[go: up one dir, main page]

CN118852707B - Preparation method of oxygen and water vapor barrier packaging bag - Google Patents

Preparation method of oxygen and water vapor barrier packaging bag Download PDF

Info

Publication number
CN118852707B
CN118852707B CN202410959925.2A CN202410959925A CN118852707B CN 118852707 B CN118852707 B CN 118852707B CN 202410959925 A CN202410959925 A CN 202410959925A CN 118852707 B CN118852707 B CN 118852707B
Authority
CN
China
Prior art keywords
modified filler
barrier
mixing
water
barrier layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202410959925.2A
Other languages
Chinese (zh)
Other versions
CN118852707A (en
Inventor
李育富
赖金莹
王枚
江慧慧
杜琰奕
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Foshan Shuangfu Packaging Co ltd
Original Assignee
Foshan Shuangfu Packaging Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Foshan Shuangfu Packaging Co ltd filed Critical Foshan Shuangfu Packaging Co ltd
Priority to CN202410959925.2A priority Critical patent/CN118852707B/en
Publication of CN118852707A publication Critical patent/CN118852707A/en
Application granted granted Critical
Publication of CN118852707B publication Critical patent/CN118852707B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/048—Forming gas barrier coatings
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/65—Additives macromolecular
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C08J2367/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
    • C08K2003/3009—Sulfides
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/14—Gas barrier composition
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
    • Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Plant Pathology (AREA)
  • Inorganic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Laminated Bodies (AREA)
  • Wrappers (AREA)

Abstract

本发明属于包装袋技术领域，公开了阻隔氧气、水蒸气包装袋的制备方法。该制备方法包括以下步骤：阻隔氧气、水蒸气包装袋包括依次叠层设置的第一阻隔层、袋体基材层、第二阻隔层；袋体基材层的组成为聚乳酸；第一阻隔层通过水性羟基丙烯酸树脂、环氧树脂、第一改性填料、助剂混合干燥得到；第二阻隔层通过水性羟基丙烯酸树脂、环氧树脂、第二改性填料、助剂混合干燥得到；第一改性填料通过纳米硅酸钠、纳米二氧化硅、聚氧化乙烯、硅烷偶联剂、水、甘油混合得到；第二改性填料通过纳米二硫化钼、纳米二氧化硅、聚乙二醇、硅烷偶联剂、水混合得到，第一改性填料制备过程在加纳米硅酸钠时，还加入碳纳米管。包装袋具有良好的阻隔氧气、水蒸气效果。

The invention belongs to the technical field of packaging bags, and discloses a method for preparing a packaging bag that blocks oxygen and water vapor. The preparation method comprises the following steps: the packaging bag that blocks oxygen and water vapor comprises a first barrier layer, a bag substrate layer, and a second barrier layer that are sequentially stacked; the bag substrate layer is composed of polylactic acid; the first barrier layer is obtained by mixing and drying water-based hydroxy acrylic resin, epoxy resin, a first modified filler, and an auxiliary agent; the second barrier layer is obtained by mixing and drying water-based hydroxy acrylic resin, epoxy resin, a second modified filler, and an auxiliary agent; the first modified filler is obtained by mixing nano sodium silicate, nano silicon dioxide, polyethylene oxide, a silane coupling agent, water, and glycerol; the second modified filler is obtained by mixing nano molybdenum disulfide, nano silicon dioxide, polyethylene glycol, a silane coupling agent, and water, and carbon nanotubes are also added when adding nano sodium silicate during the preparation process of the first modified filler. The packaging bag has a good effect of blocking oxygen and water vapor.

Description

Preparation method of packaging bag capable of blocking oxygen and water vapor
The application relates to a method for preparing a packaging bag for blocking oxygen and water vapor, which is a divisional application of application No. 202410649713.4, the application date of which is 24 days of 05 months of 2024.
Technical Field
The invention belongs to the technical field of packaging bags, and particularly relates to a preparation method of a packaging bag capable of blocking oxygen and water vapor.
Background
Polymeric materials have a wide range of applications in the packaging field, for example for the purpose of various packaging bags. However, the degradation performance of the polymer materials is poor, and the polymer materials are not environment-friendly. Polylactic acid is an environment-friendly material, so that the polylactic acid is gradually popularized and used for manufacturing packaging bags. However, when polylactic acid is directly used as a packaging bag, its corresponding oxygen and water vapor barrier properties are poor, which is disadvantageous for preservation of some foods or medicines.
In addition, the existing polylactic acid has poor tensile strength, so that the use of the polylactic acid packaging bag is limited.
Accordingly, there is a need to provide a novel polylactic acid packaging bag having not only good oxygen barrier properties but also good water vapor barrier properties.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the prior art described above. Therefore, the invention provides a preparation method of the packaging bag for blocking oxygen and water vapor. The oxygen and water vapor blocking packaging bag prepared by the preparation method has good blocking performance on oxygen and water vapor, and the base material of the oxygen and water vapor blocking packaging bag is polylactic acid, so that the oxygen and water vapor blocking packaging bag has good degradation effect, and is an environment-friendly packaging bag.
The packaging bag for blocking oxygen and water vapor comprises a first blocking layer, a bag body substrate layer and a second blocking layer which are sequentially laminated, wherein the first blocking layer takes aqueous hydroxy acrylic resin and epoxy resin as main film forming substances, the modified filler (first modified filler and second modified filler) can be uniformly dispersed in the aqueous hydroxy acrylic resin and the epoxy resin through modification, a uniform network crosslinking structure is formed after drying and curing, the first modified filler is obtained through modification of nano sodium silicate, nano silicon dioxide, polyethylene oxide, a silane coupling agent, water and glycerin, and the polyethylene carries out surface modification on the nano sodium silicate and the nano silicon dioxide, so that the nano sodium silicate and the nano silicon dioxide can be uniformly dispersed after the silane coupling agent is hydrolyzed by water, the compatibility with the aqueous hydroxy acrylic resin and the epoxy resin is further improved, the structure of the first blocking layer is stable, and the first modified filler can be uniformly dispersed. The second modified filler is prepared from nano molybdenum disulfide, nano silicon dioxide, polyethylene glycol, a silane coupling agent and water. By modifying the nano molybdenum disulfide and the nano silicon dioxide by using polyethylene glycol, a silane coupling agent and water, the second modified filler and the resin substance are uniformly dispersed, and a uniform network structure can be formed during drying and curing. Through the combined use of the first barrier layer and the second barrier layer, the bag body substrate layer which is formed into the polylactic acid has good oxygen and water vapor barrier effect. Through the combined use of the first barrier layer and the second barrier layer, the oxygen and water vapor barrier packaging bag also has better mechanical strength, which is beneficial to popularization and application of the oxygen and water vapor barrier packaging bag.
When the second modified filler is prepared, chitosan acid liquor is also added, so that the antibacterial effect of the second barrier layer is improved, the polyhydroxy characteristics of chitosan are fully utilized, the dispersion of nano molybdenum disulfide and nano silicon dioxide is promoted, the compatibility of the second modified filler with water-based hydroxy acrylic resin and epoxy resin is obviously improved, and the hydroxyl substance component can also enhance the network structural strength of the second barrier layer when the second barrier layer is dried and solidified.
In order to achieve the above purpose, the present invention is realized by the following technical scheme:
The preparation method of the packaging bag for blocking oxygen and water vapor comprises the following steps:
the packaging bag for blocking oxygen and water vapor comprises a first blocking layer, a bag body substrate layer and a second blocking layer which are sequentially laminated;
The composition of the bag body substrate layer is polylactic acid;
The preparation process of the first barrier layer comprises the steps of mixing water-based hydroxyl acrylic resin, epoxy resin, first modified filler and auxiliary agent to obtain first barrier slurry, coating one surface of the bag body substrate layer, and drying to obtain the first barrier layer;
The preparation process of the second barrier layer comprises the steps of mixing water-based hydroxyl acrylic resin, epoxy resin, second modified filler and auxiliary agent to obtain second barrier slurry, coating the second barrier slurry on the other surface of the bag body substrate layer, and drying to obtain the second barrier layer;
The preparation process of the first modified filler comprises the steps of stirring and mixing nano sodium silicate, nano silicon dioxide, polyethylene oxide, a silane coupling agent, water and glycerin according to the weight ratio of 1 (1-2) (0.5-2) (1.5-3) (5-20) (3-10) to obtain the first modified filler;
The preparation process of the second modified filler comprises the steps of stirring and mixing nano molybdenum disulfide, nano silicon dioxide, polyethylene glycol, a silane coupling agent and water according to the weight ratio of 1 (0.5-2.5) (2-3.5) (5-15) (10-20) to obtain the second modified filler.
Preferably, chitosan acid liquor is also added in the preparation process of the second modified filler, the preparation process of the second modified filler comprises the steps of mixing chitosan, organic acid and water according to the weight ratio of (0.5-2) to (10-50) to obtain chitosan acid liquor, then adding nano molybdenum disulfide, nano silicon dioxide, polyethylene glycol, silane coupling agent and water, stirring and mixing to obtain the second modified filler;
the weight ratio of the chitosan acid liquor, the nano molybdenum disulfide, the nano silicon dioxide, the polyethylene glycol, the silane coupling agent and the water is (0.5-1.1) 1 (1-2.5) 2-3.5 (5-15) 10-20.
Preferably, the organic acid includes at least one of citric acid and acetic acid.
Preferably, the preparation process of the first barrier layer comprises the steps of mixing, by weight, 50 parts of aqueous hydroxy acrylic resin, 30-50 parts of epoxy resin, 20-40 parts of first modified filler and 3-8 parts of auxiliary agent to obtain first barrier slurry, coating one side of a base material layer of the bag body, and drying to obtain the first barrier layer.
Preferably, the preparation process of the second barrier layer comprises the steps of mixing 50 parts of water-based hydroxyl acrylic resin, 30-50 parts of epoxy resin, 15-45 parts of second modified filler and 3-8 parts of auxiliary agent to obtain second barrier slurry, coating the second barrier slurry on the other surface of the bag body substrate layer, and drying to obtain the second barrier layer.
Preferably, the thickness of the bag body substrate layer is 10-30 μm, and more preferably, the thickness of the bag body substrate layer is 20-25 μm.
Preferably, the auxiliary agent comprises isocyanate and at least one of diethylenetriamine, triethylenetetramine and diethylaminopropylamine.
Preferably, the weight ratio of isocyanate and at least one of diethylenetriamine, triethylenetetramine and diethylaminopropylamine in the auxiliary agent is (1.5-4): 1.
Preferably, the auxiliary agent further comprises polydimethylsiloxane and sodium dodecyl sulfonate.
Preferably, the isocyanate is at least one selected from hexamethylene diisocyanate, toluene diisocyanate and lysine diisocyanate.
Preferably, the second barrier layer is in contact with the food or drug when the food or drug is packaged. I.e. the second barrier layer, as an in-bag structure.
Preferably, when the first barrier slurry is applied, the corresponding coating amount is 10-18g/m 2, and more preferably, the corresponding coating amount is 16-18g/m 2.
Preferably, the temperature of drying is 20-60 ℃ and the time of drying is 24-72 hours when the first barrier slurry is coated. Sufficient drying time to allow adequate curing of the film-forming material.
Preferably, when the second barrier slurry is applied, the corresponding coating amount is 10-18g/m 2, and more preferably, the corresponding coating amount is 16-18g/m 2.
Preferably, the temperature of drying is 20-60 ℃ and the time of drying is 24-72 hours when the second barrier slurry is coated.
Preferably, the carbon nano tube is further added during the preparation process of the first modified filler when the nano sodium silicate is added. The preparation method of the first modified filler ensures that the carbon nano tube has good dispersibility, thereby obviously improving the tensile property of the packaging bag for blocking oxygen and water vapor.
Preferably, the mass ratio of the nano sodium silicate to the carbon nano tube is 1 (0.01-0.2), and more preferably 1 (0.05-0.1).
Preferably, the preparation method of the packaging bag for blocking oxygen and water vapor comprises the following steps:
the packaging bag for blocking oxygen and water vapor comprises a first blocking layer, a bag body substrate layer and a second blocking layer which are sequentially laminated;
The composition of the bag body substrate layer is polylactic acid;
The preparation process of the first barrier layer comprises the steps of mixing 50 parts by weight of water-based hydroxyl acrylic resin, 35-45 parts by weight of epoxy resin, 25-40 parts by weight of first modified filler and 4-8 parts by weight of auxiliary agent to obtain first barrier slurry, coating one surface of a base material layer of the bag body, and drying to obtain the first barrier layer;
the preparation process of the second barrier layer comprises the steps of mixing 50 parts of water-based hydroxyl acrylic resin, 35-50 parts of epoxy resin, 20-45 parts of second modified filler and 4-8 parts of auxiliary agent to obtain second barrier slurry, coating the second barrier slurry on the other surface of the bag body substrate layer, and drying to obtain the second barrier layer;
The preparation process of the first modified filler comprises the steps of stirring and mixing nano sodium silicate, nano silicon dioxide, polyethylene oxide, a silane coupling agent, water and glycerin according to the weight ratio of 1 (1.2-2) (0.8-2) (1.5-2.5) (8-15) (3-8) to prepare the first modified filler;
the preparation process of the second modified filler comprises the steps of mixing chitosan, organic acid and water according to the weight ratio of (0.5-2) to (20-50) to obtain chitosan acid liquor, then adding nano molybdenum disulfide, nano silicon dioxide, polyethylene glycol, silane coupling agent and water, and stirring and mixing the chitosan acid liquor, the nano molybdenum disulfide, the nano silicon dioxide, the polyethylene glycol, the silane coupling agent and the water according to the weight ratio of (0.5-1.1) to (1-2.5) to (2-3.5) to (5-15) to (10-20) to obtain the second modified filler.
Compared with the prior art, the invention has the following beneficial effects:
(1) The packaging bag for blocking oxygen and water vapor comprises a first blocking layer, a bag body substrate layer and a second blocking layer which are sequentially laminated, wherein the first blocking layer takes aqueous hydroxy acrylic resin and epoxy resin as main film forming substances, the modified filler (first modified filler and second modified filler) can be uniformly dispersed in the aqueous hydroxy acrylic resin and the epoxy resin through modification, a uniform network crosslinking structure is formed after drying and curing, the first modified filler is obtained through modification of nano sodium silicate, nano silicon dioxide, polyethylene oxide, a silane coupling agent, water and glycerin, and the polyethylene carries out surface modification on the nano sodium silicate and the nano silicon dioxide, so that the nano sodium silicate and the nano silicon dioxide can be uniformly dispersed after the silane coupling agent is hydrolyzed by water, the compatibility with the aqueous hydroxy acrylic resin and the epoxy resin is further improved, the structure of the first blocking layer is stable, and the first modified filler can be uniformly dispersed. The second modified filler is prepared from nano molybdenum disulfide, nano silicon dioxide, polyethylene glycol, a silane coupling agent and water. By modifying the nano molybdenum disulfide and the nano silicon dioxide by using polyethylene glycol, a silane coupling agent and water, the second modified filler and the resin substance are uniformly dispersed, and a uniform network structure can be formed during drying and curing. Through the combined use of the first barrier layer and the second barrier layer, the bag body substrate layer which is formed into the polylactic acid has good oxygen and water vapor barrier effect. Through the combined use of the first barrier layer and the second barrier layer, the oxygen and water vapor barrier packaging bag also has better mechanical strength, which is beneficial to popularization and application of the oxygen and water vapor barrier packaging bag.
(2) When the second modified filler is prepared, chitosan acid liquor is also added, so that the antibacterial effect of the second barrier layer is improved, the polyhydroxy characteristics of chitosan are fully utilized, the dispersion of nano molybdenum disulfide and nano silicon dioxide is promoted, the compatibility of the second modified filler with water-based hydroxy acrylic resin and epoxy resin is obviously improved, and the hydroxyl substance component can also enhance the network structural strength of the second barrier layer when the second barrier layer is dried and solidified.
Drawings
Fig. 1 is a schematic structural diagram of an oxygen and water vapor barrier packaging bag prepared in example 1 of the present invention.
Detailed Description
In order to make the technical solutions of the present invention more apparent to those skilled in the art, the following examples will be presented. It should be noted that the following examples do not limit the scope of the invention.
The starting materials, reagents or apparatus used in the following examples are all available from conventional commercial sources or may be obtained by methods known in the art unless otherwise specified.
Example 1
The preparation method of the packaging bag for blocking oxygen and water vapor comprises the following steps:
The oxygen and water vapor barrier packaging bag comprises a first barrier layer, a bag body substrate layer and a second barrier layer which are sequentially laminated, wherein fig. 1 is a schematic structural diagram of the oxygen and water vapor barrier packaging bag prepared in embodiment 1 of the invention, wherein 100 represents the first barrier layer, 200 represents the bag body substrate layer and 300 represents the second barrier layer.
The composition of the bag body substrate layer is polylactic acid, and the thickness of the bag body substrate layer is 20 mu m;
The preparation process of the first barrier layer comprises the steps of mixing 50 parts by weight of aqueous hydroxy acrylic resin, 35 parts by weight of epoxy resin (bisphenol A type epoxy resin), 30 parts by weight of first modified filler, 6 parts by weight of auxiliary agent (2 parts by weight of diethylenetriamine, 3 parts by weight of hexamethylene diisocyanate, 0.5 part by weight of polydimethylsiloxane and 0.5 part by weight of sodium dodecyl sulfonate), stirring at a stirring speed of 500 revolutions per minute for 30 minutes to obtain first barrier slurry, and then coating (the coating amount is 17g/m 2) on one surface of a bag body substrate layer, drying at a drying temperature of 40 ℃ for 36 hours to obtain the first barrier layer;
The preparation process of the second barrier layer comprises the steps of mixing 50 parts of aqueous hydroxy acrylic resin, 40 parts of epoxy resin (bisphenol F type epoxy resin), 30 parts of second modified filler, 6.2 parts of auxiliary agent (2.2 parts of diethylenetriamine, 3 parts of hexamethylene diisocyanate, 0.5 part of polydimethylsiloxane and 0.5 part of sodium dodecyl sulfonate), wherein the stirring speed during mixing is 500 revolutions per minute, the mixing time is 30 minutes, the second barrier slurry is obtained, and then the second barrier layer is obtained after coating (the coating amount is 18g/m 2) on the other surface of the bag body substrate layer, and drying is carried out at the temperature of 40 ℃ for 36 hours;
the preparation process of the first modified filler comprises the steps of stirring and mixing nano sodium silicate, nano silicon dioxide, polyethylene oxide, a silane coupling agent KH550, water and glycerol according to the weight ratio of 1:1.3:0.9:1.8:10:5, wherein the stirring speed is 400 revolutions per minute, and the mixing time is 20 minutes, so as to prepare the first modified filler;
the preparation process of the second modified filler comprises the steps of stirring and mixing nano molybdenum disulfide, nano silicon dioxide, polyethylene glycol, a silane coupling agent KH560 and water according to the weight ratio of 1:1.5:3.0:12:15, wherein the stirring speed is 400 rpm, and the mixing time is 25 minutes, so that the second modified filler is prepared.
Example 2
The preparation method of the packaging bag for blocking oxygen and water vapor comprises the following steps:
the packaging bag for blocking oxygen and water vapor comprises a first blocking layer, a bag body substrate layer and a second blocking layer which are sequentially laminated;
the composition of the bag body base material layer is polylactic acid, and the thickness of the bag body base material layer is 25 mu m;
The preparation process of the first barrier layer comprises the steps of mixing 50 parts by weight of aqueous hydroxy acrylic resin, 40 parts by weight of epoxy resin (bisphenol A type epoxy resin), 35 parts by weight of first modified filler, 7 parts by weight of auxiliary agent (diethylaminopropylamine 2 parts, hexamethylene diisocyanate 3.5 parts, polydimethylsiloxane 1.0 parts and sodium dodecyl sulfate 0.5 parts), stirring at a stirring speed of 400 revolutions per minute for 35 minutes to obtain first barrier slurry, and then coating (coating amount of 16g/m 2) on one surface of a bag substrate layer, drying at a drying temperature of 45 ℃ for 30 hours to obtain the first barrier layer;
The preparation process of the second barrier layer comprises the steps of mixing 50 parts of aqueous hydroxy acrylic resin, 38 parts of epoxy resin (bisphenol A type epoxy resin), 35 parts of second modified filler, 6.2 parts of auxiliary agent (2.2 parts of triethylene tetramine, 3 parts of hexamethylene diisocyanate, 0.5 part of polydimethylsiloxane and 0.5 part of sodium dodecyl sulfate), wherein the stirring speed during mixing is 550 r/min, the mixing time is 25 min, the second barrier slurry is obtained, and then the second barrier layer is obtained after coating (the coating amount is 17g/m 2) on the other surface of the bag body substrate layer, drying the bag body substrate layer, the drying temperature is 40 ℃, and the drying time is 36 hours;
The preparation process of the first modified filler comprises the steps of stirring and mixing nano sodium silicate, nano silicon dioxide, polyethylene oxide, a silane coupling agent KH550, water and glycerol according to the weight ratio of 1:1.8:1.0:1.9:14:6, wherein the stirring speed is 450 revolutions per minute, and the mixing time is 20 minutes, so as to prepare the first modified filler;
The preparation process of the second modified filler comprises the steps of stirring and mixing nano molybdenum disulfide, nano silicon dioxide, polyethylene glycol, a silane coupling agent KH550 and water according to the weight ratio of 1:1.8:2.5:10:18, wherein the stirring speed is 450 revolutions per minute, and the mixing time is 25 minutes, so that the second modified filler is prepared.
Example 3
The preparation method of the packaging bag for blocking oxygen and water vapor comprises the following steps:
the packaging bag for blocking oxygen and water vapor comprises a first blocking layer, a bag body substrate layer and a second blocking layer which are sequentially laminated;
The composition of the bag body substrate layer is polylactic acid, and the thickness of the bag body substrate layer is 20 mu m;
The preparation process of the first barrier layer comprises the steps of mixing 50 parts by weight of aqueous hydroxy acrylic resin, 35 parts by weight of epoxy resin (bisphenol A type epoxy resin), 30 parts by weight of first modified filler, 6 parts by weight of auxiliary agent (2 parts by weight of diethylenetriamine, 3 parts by weight of hexamethylene diisocyanate, 0.5 part by weight of polydimethylsiloxane and 0.5 part by weight of sodium dodecyl sulfonate), stirring at a stirring speed of 500 revolutions per minute for 30 minutes to obtain first barrier slurry, and then coating (the coating amount is 17g/m 2) on one surface of a bag body substrate layer, drying at a drying temperature of 40 ℃ for 36 hours to obtain the first barrier layer;
The preparation process of the second barrier layer comprises the steps of mixing 50 parts of aqueous hydroxy acrylic resin, 40 parts of epoxy resin (bisphenol F type epoxy resin), 30 parts of second modified filler, 6.2 parts of auxiliary agent (2.2 parts of diethylenetriamine, 3 parts of hexamethylene diisocyanate, 0.5 part of polydimethylsiloxane and 0.5 part of sodium dodecyl sulfonate), wherein the stirring speed during mixing is 500 revolutions per minute, the mixing time is 30 minutes, the second barrier slurry is obtained, and then the second barrier layer is obtained after coating (the coating amount is 18g/m 2) on the other surface of the bag body substrate layer, and drying is carried out at the temperature of 40 ℃ for 36 hours;
the preparation process of the first modified filler comprises the steps of stirring and mixing nano sodium silicate, nano silicon dioxide, polyethylene oxide, a silane coupling agent KH550, water and glycerol according to the weight ratio of 1:1.3:0.9:1.8:10:5, wherein the stirring speed is 400 revolutions per minute, and the mixing time is 20 minutes, so as to prepare the first modified filler;
The preparation process of the second modified filler comprises the steps of mixing chitosan, acetic acid and water according to the weight ratio of 1:1:40 to obtain chitosan acid liquor, then adding nano molybdenum disulfide, nano silicon dioxide, polyethylene glycol, a silane coupling agent and water, stirring and mixing the chitosan acid liquor, the nano molybdenum disulfide, the nano silicon dioxide, the polyethylene glycol, the silane coupling agent and the water according to the weight ratio of 0.8:1:1.5:3.0:12:15, wherein the stirring speed is 400 revolutions per minute, and the mixing time is 25 minutes, so as to obtain the second modified filler.
Example 4
Example 4 differs from example 1 only in that example 4 was added with 0.08 parts of carbon nanotubes at the same time as nano sodium silicate, and the remaining components and processes were the same as example 1.
Comparative example 1
Comparative example 1 differs from example 1 only in that comparative example 1 uses an equivalent amount of aqueous hydroxyacrylic resin instead of epoxy resin in the preparation of the first and second barrier layers, and the remaining components and processes are the same as example 1.
Comparative example 2
Comparative example 2 differs from example 1 only in that comparative example 2 uses the same amount of polyethylene glycol instead of polyethylene oxide in the preparation of the first modified filler, and the remaining components and processes are the same as example 1.
Comparative example 3
Comparative example 3 differs from example 1 only in that comparative example 3 uses an equivalent amount of nano silica instead of nano molybdenum disulfide in the preparation of the second modified filler, and the remaining components and processes are the same as example 1.
Product effect test
1. Oxygen, water vapor barrier performance test
The oxygen and water vapor barrier bags prepared in examples 1 and 3 and the bags prepared in comparative examples 1 to 3 were allowed to stand at a relative humidity of 85% and a temperature of 25℃for 24 hours and 72 hours, and the oxygen and water vapor transmission amounts of the bags were measured, and the results are shown in Table 1.
TABLE 1
As can be seen from Table 1, the coating materials prepared in examples 1 and 3 of the present invention have significantly better oxygen and water vapor barrier effect than those of comparative examples 1 to 3. From the results of examples 1 and 3, it can be seen that the use of chitosan acid liquor can further significantly enhance the barrier effect against oxygen and water vapor during the preparation of the second modified filler.
From the results of example 1 and comparative example 1, it can be seen that the aqueous hydroxyacrylic resin cannot replace the epoxy resin because the film layer formed by drying and curing the single aqueous hydroxyacrylic resin is poor in compactness, unstable in structure and poor in barrier property against oxygen and water vapor.
From the results of example 1 and comparative example 2, it can be seen that polyethylene oxide cannot be replaced by polyethylene glycol, because for different nano inorganic fillers, specific hydrophilic polymers need to be used for surface modification, so that the components of the modified filler have good dispersibility and can be uniformly dispersed in the resin film forming material, and the barrier effect of oxygen and water vapor on oxygen and water vapor is improved.
As can be seen from the results of example 1 and comparative example 3, the nano molybdenum disulfide cannot be replaced by the nano silicon dioxide with the same amount in the preparation process of the second modified filler, because the nano molybdenum disulfide with the two-dimensional structure is used in the preparation process of the second modified filler, and the blocking effect of the oxygen and water vapor packaging bag on oxygen and water vapor is also obviously improved.
2. Mechanical property test
The oxygen and water vapor barrier packaging bags prepared in example 1, example 2 and example 4 were tested for tensile strength according to the method of GB/T1040.1-2006, and the results are shown in Table 2.
TABLE 2
Example 1 Example 2 Example 4
Tensile Strength (MPa) 46.8 47.0 59.0
As can be seen from table 2, in the preparation process of the first modified filler, the carbon nanotubes are added, so that the carbon nanotubes can be uniformly dispersed and not aggregated, thereby remarkably improving the tensile strength of the packaging bag for blocking oxygen and water vapor.

Claims (10)

1. The preparation method of the packaging bag for blocking oxygen and water vapor is characterized by comprising the following steps:
the packaging bag for blocking oxygen and water vapor comprises a first blocking layer, a bag body substrate layer and a second blocking layer which are sequentially laminated;
The composition of the bag body substrate layer is polylactic acid;
The preparation process of the first barrier layer comprises the steps of mixing water-based hydroxyl acrylic resin, epoxy resin, first modified filler and auxiliary agent to obtain first barrier slurry, coating one surface of the bag body substrate layer, and drying to obtain the first barrier layer;
The preparation process of the second barrier layer comprises the steps of mixing water-based hydroxyl acrylic resin, epoxy resin, second modified filler and auxiliary agent to obtain second barrier slurry, coating the second barrier slurry on the other surface of the bag body substrate layer, and drying to obtain the second barrier layer;
The preparation process of the first modified filler comprises the steps of stirring and mixing nano sodium silicate, nano silicon dioxide, polyethylene oxide, a silane coupling agent, water and glycerin according to the weight ratio of 1 (1-2) (0.5-2) (1.5-3) (5-20) (3-10) to obtain the first modified filler;
The preparation process of the second modified filler comprises the steps of stirring and mixing nano molybdenum disulfide, nano silicon dioxide, polyethylene glycol, a silane coupling agent and water according to the weight ratio of 1 (0.5-2) (2-3.5) (5-15) (10-20) to prepare the second modified filler;
When nano sodium silicate is added in the preparation process of the first modified filler, carbon nano tubes are also added.
2. The preparation method of the second modified filler is characterized in that chitosan acid liquor is also added in the preparation process of the second modified filler, the preparation process of the second modified filler comprises the steps of mixing chitosan, organic acid and water according to the weight ratio of 1 (0.5-2) to 10-50 to obtain chitosan acid liquor, then adding nano molybdenum disulfide, nano silicon dioxide, polyethylene glycol, silane coupling agent and water, stirring and mixing to obtain the second modified filler;
the weight ratio of the chitosan acid liquor, the nano molybdenum disulfide, the nano silicon dioxide, the polyethylene glycol, the silane coupling agent and the water is (0.5-1.1) 1 (1-2.5) 2-3.5 (5-15) 10-20.
3. The method according to claim 2, wherein the organic acid comprises at least one of citric acid and acetic acid.
4. The preparation method of the first barrier layer according to claim 1, wherein the preparation process of the first barrier layer comprises the steps of mixing, by weight, 50 parts of aqueous hydroxy acrylic resin, 30-50 parts of epoxy resin, 20-40 parts of first modified filler and 3-8 parts of auxiliary agent to obtain first barrier slurry, coating the first barrier slurry on one surface of the bag body substrate layer, and drying to obtain the first barrier layer.
5. The preparation method of the second barrier layer according to claim 1, wherein the preparation process of the second barrier layer comprises the steps of mixing 50 parts of aqueous hydroxy acrylic resin, 30-50 parts of epoxy resin, 15-45 parts of second modified filler and 3-8 parts of auxiliary agent to obtain second barrier slurry, coating the second barrier slurry on the other surface of the bag body substrate layer, and drying to obtain the second barrier layer.
6. The method of claim 1, wherein the thickness of the pouch substrate layer is 10-30 μm.
7. The method according to claim 1, wherein the auxiliary agent comprises isocyanate and at least one of diethylenetriamine, triethylenetetramine and diethylaminopropylamine.
8. The method according to claim 7, wherein the auxiliary agent further comprises polydimethylsiloxane and sodium dodecyl sulfonate.
9. The method of claim 1, wherein the first barrier slurry is applied in a corresponding amount of 10-18g/m 2, and wherein the first barrier slurry is dried at 20-60 ℃ for 24-72 hours.
10. The method of claim 1, wherein the second barrier slurry is applied in a corresponding amount of 10-18g/m 2, and wherein the second barrier slurry is dried at 20-60 ℃ for 24-72 hours.
CN202410959925.2A 2024-05-24 2024-05-24 Preparation method of oxygen and water vapor barrier packaging bag Active CN118852707B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202410959925.2A CN118852707B (en) 2024-05-24 2024-05-24 Preparation method of oxygen and water vapor barrier packaging bag

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202410649713.4A CN118271683B (en) 2024-05-24 2024-05-24 A method for preparing a packaging bag capable of blocking oxygen and water vapor
CN202410959925.2A CN118852707B (en) 2024-05-24 2024-05-24 Preparation method of oxygen and water vapor barrier packaging bag

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CN202410649713.4A Division CN118271683B (en) 2024-05-24 2024-05-24 A method for preparing a packaging bag capable of blocking oxygen and water vapor

Publications (2)

Publication Number Publication Date
CN118852707A CN118852707A (en) 2024-10-29
CN118852707B true CN118852707B (en) 2025-02-11

Family

ID=91634742

Family Applications (2)

Application Number Title Priority Date Filing Date
CN202410959925.2A Active CN118852707B (en) 2024-05-24 2024-05-24 Preparation method of oxygen and water vapor barrier packaging bag
CN202410649713.4A Active CN118271683B (en) 2024-05-24 2024-05-24 A method for preparing a packaging bag capable of blocking oxygen and water vapor

Family Applications After (1)

Application Number Title Priority Date Filing Date
CN202410649713.4A Active CN118271683B (en) 2024-05-24 2024-05-24 A method for preparing a packaging bag capable of blocking oxygen and water vapor

Country Status (1)

Country Link
CN (2) CN118852707B (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003011284A (en) * 2001-07-04 2003-01-15 Mitsui Chemicals Inc Laminated film or sheet and manufacturing method thereof
CN115139603A (en) * 2022-07-04 2022-10-04 平湖市华达塑料制品有限公司 Multilayer biodegradable foaming buffer film and preparation method thereof

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3913847B2 (en) * 1996-07-19 2007-05-09 株式会社クレハ Gas barrier composite film
US7267877B2 (en) * 2000-12-26 2007-09-11 Mitsubishi Gas Chemical Company, Inc. Composition for coating having a gas barrier property, coating and coated film having a gas barrier property used the same
WO2007026751A1 (en) * 2005-08-31 2007-03-08 Mitsubishi Plastics, Inc. Gas barrier multilayer film
WO2012047246A1 (en) * 2010-10-06 2012-04-12 Toray Plastics (America) Inc. Barrier coating composition with organic particles
WO2014063009A1 (en) * 2012-10-18 2014-04-24 Texas State University-San Marcos Multi-functional high performance nanocoatings from a facile co-assembly process
JP7503929B2 (en) * 2020-03-31 2024-06-21 アキレス株式会社 Biodegradable laminated paper and packaging materials
CN114211841A (en) * 2021-12-23 2022-03-22 浙江大学台州研究院 A kind of degradable high barrier composite film and preparation method thereof
CN116926992B (en) * 2023-07-07 2024-03-19 佛山市泽景包装科技有限公司 Waterproof, oil-proof and gas-blocking paint, preparation method thereof and packaging paper

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003011284A (en) * 2001-07-04 2003-01-15 Mitsui Chemicals Inc Laminated film or sheet and manufacturing method thereof
CN115139603A (en) * 2022-07-04 2022-10-04 平湖市华达塑料制品有限公司 Multilayer biodegradable foaming buffer film and preparation method thereof

Also Published As

Publication number Publication date
CN118852707A (en) 2024-10-29
CN118271683B (en) 2024-08-06
CN118271683A (en) 2024-07-02

Similar Documents

Publication Publication Date Title
Reddy et al. Mechanical, thermal, and water vapor barrier properties of regenerated cellulose/nano-SiO2 composite films
CN109054584B (en) A kind of nano-scale cellulose functional doping modified coating and preparation method thereof
CN116926992B (en) Waterproof, oil-proof and gas-blocking paint, preparation method thereof and packaging paper
CN112280261A (en) Full-biodegradable high-barrier PLA/PBAT composite packaging film
CN111019507B (en) A kind of high-strength water-based polyurethane/cellulose nanocomposite emulsion and preparation method thereof
CN115894855A (en) A kind of preparation method and application of cellulose nanocrystal modified waterborne polyurethane composite material
CN116333459B (en) High-barrier PBAT material and preparation method and application thereof
CN115368728A (en) Polymer composite filling block and preparation method thereof
CN118852707B (en) Preparation method of oxygen and water vapor barrier packaging bag
CN119773337B (en) A polyethylene isolation film with high residual bonding rate and preparation method thereof
CN118374149A (en) A SiO2@hyperbranched polymer/polyimide composite film and preparation method thereof
CN117050590A (en) Teflon roller and production process thereof
CN112831165B (en) Degradable barrier nano composite film and preparation method and application thereof
CN108102603B (en) A kind of two-component addition type thermal conductive silicone rubber containing graphene and preparation method thereof
CN112940318A (en) Method for producing organic-inorganic composite film and organic-inorganic composite film
CN117799272A (en) Bio-based food packaging bag and preparation method thereof
CN107488320A (en) A kind of preparation method for the polyvinyl alcohol/silicon dioxide nano compound film having excellent water-resistance
CN117511365A (en) Polylactic acid/polydopamine/mica nano composite coating and preparation method and application thereof
CN111807373B (en) Inorganic nano material with polymer performance and preparation method thereof
CN110396220A (en) A kind of carbon nanotube-based polyol and carbon nanotube/polyurethane composite material and preparation method thereof
CN110387769A (en) Preparation method and application of a high-strength barrier hydrophobic paper-based coating
CN111393653A (en) Modified epoxy resin composition, adhesive film and preparation method thereof
CN115260976B (en) Water-soluble polyurethane adhesive and preparation method thereof
CN118440496A (en) Polymer rubber stabilizer and preparation method thereof
CN120649302A (en) A corrosion-resistant epoxy resin composite carbon fiber sizing agent and preparation method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant