KR20200117125A - Self-adhesive and sealed eco-friendly paper packaging materials - Google Patents

Abstract

The present invention relates to a self-adhesive and -sealed eco-friendly paper packaging material, which substitutes for a vinyl-made packaging material causing severe environmental pollution, is eco-friendly, allows free folding deformation to the shape and size of an article having a difficulty in packaging with a thick corrugated cardboard material, realizes self-adhesion, and provides significantly improved convenience in use so that an article may be packaged and sealed safely and conveniently in accordance with the shape of the article by pressurizing an edge portion simply under a predetermined pressure at room temperature without using any separate adhesive means upon the sealing treatment. According to the present invention, an adhesive composition, which maintains its adhesion continuously with the lapse of time, while realizing adhesive force to such a degree that paper may be broken upon the adhesion of the same surfaces, is applied to one surface of kraft paper as a self-adhesive and -sealed eco-friendly paper packing material. Particularly, the adhesive composition includes polyisoprene which is eco-friendly and has excellent cohesive force and adhesive force, and polyisoprene is mixed with ethylene vinyl acetate (EVA) at a mixing ratio of 90:10 to increase the close adhesion between polyisoprene and paper, thereby providing an aqueous adhesive including a natural latex ingredient. The aqueous adhesive is mixed with about 20 wt% of SBR synthetic latex having a glass transition temperature (Tg) of about -10-0°C to increase the adhesion strength. Then, the resultant mixture is mixed with 5 wt% of a non-phthalate plasticizer to increase the flexibility of the adhesive and to enhance the self-adhesive properties, and further mixed with 1.5 wt% of an amine-based anti-aging agent to prevent the aging of the adhesive.

Description

Self-adhesive and sealed eco-friendly paper packaging materials

The present invention relates to an eco-friendly paper packaging material that is self-adhesive and sealed that can be adhesively sealed without using a separate adhesive, and is an eco-friendly and environmentally friendly, yet difficult to implement, thick corrugated product as an alternative to a vinyl packaging material with severe environmental pollution. The shape and size of the product can be folded and deformed freely, but its self-adhesive power can be exerted.Therefore, it is safe and safe to fit the shape of the product by simply pressing the edge part at room temperature with a certain pressure without using a separate bonding means during sealing. It relates to an eco-friendly, self-adhesive and sealed eco-friendly paper packaging material that dramatically improves ease of use so that items can be conveniently packaged and sealed.

As is well known, corrugated cardboard packaging materials are inexpensive, have good uniformity, high strength per unit weight, excellent adhesion and printability, and have excellent adaptability to relatively high/low temperatures, as well as odor and toxicity. It is hygienic, has good automatic packaging aptitude, excellent shape retention, excellent environmental adaptability, and excellent waste recycling, so it occupies an overwhelming position as a packaging material.

However, in spite of these numerous advantages, corrugated cardboard has a corrugated property, which provides excellent cushioning for product protection, but the cut surface is not neat, it folds only when a cut is inserted, and it is not a soft material that can cut hands during packaging. There are many disadvantages in the use of such as inconveniences.

In addition, even if the delivery process or storage is not necessary, it is impossible to flexibly change its shape due to the nature of the corrugated board, so not only the packaging space is wasted more than necessary.Although it is eco-friendly, a considerable amount before incineration or other recycling is normally performed after use. There is also the inconvenience that it is difficult to sag due to the volume of garbage.

On the other hand, for clothing, books, and other articles that do not require buffering packaging, packaging materials that are light and free of shape deformation, such as vinyl, may be more convenient and economical, but plastic packaging materials naturally have environmental pollution problems. Rather, it has the disadvantage of being too vulnerable to external shocks during the delivery process. Therefore, it can be said that a packaging material containing an adhesive component, which is an alternative packaging material that is not a hard material such as corrugated cardboard, and contains an adhesive component, is naturally required.

For reference, looking at the existing prior art for packaging paper (packaging material) containing an adhesive component capable of sealingly packaging relatively small items (accessories), Registration Patent No. 10-0295597 (A soluble packaging material with a non-adhesive interior), registered Patent No. 10-0417673 (packaging paper and packaging method sealed with foil), Patent Publication No. 2001-0082215 (packaging paper), Patent Publication No. 2001-0101069 (packaging paper), Patent Publication No. 2002-0001743 (Pressure paper- Plastic film laminated tape), Patent Publication No. 10-2005-0108086 (tea bag packaging paper), Registration Patent No. 10-1502186 (pattern paper packaging paper with higher chalk level), Publication Patent No. 10-2015-0078853 (disposable use) Food packaging paper), Registration Patent No. 10-1816354 (coating composition for food packing material that can realize paper texture), Registration Utility Model No. 20-0370733 (packaging material), Registration Utility Model No. 20-0378858 (packaging material for pharmaceuticals packaging), Publication Utility model No. 20-2012-0000856 (packaging paper for fish packaging) has been disclosed.

However, the above-listed prior art does not have a big problem in sealing and packaging the corresponding product, which is mostly the contents, but the product formation process of the packaging material itself is structurally more complicated than necessary. In particular, the product of a certain size is placed directly on the wrapping paper and is simply There are aspects that are not very satisfactory in the convenience of packaging work of folding and sealing and bonding, and the functionality and economy of sealing bonding performance. Therefore, it is a material that can be easily self-adhesive and sealed, and is an eco-friendly packaging material that can be easily self-adhesive and sealed as a material that can freely change shape according to the item to be packaged according to the recent strong crackdown on environmentally polluted packaging materials as well as economical properties. You can say it is necessary.

The present invention has been researched and developed to reliably solve structurally and functionally all inconveniences that the existing packaging materials have not solved, and can be free from crackdowns and punishments for vinyl packaging materials with severe environmental pollution in recent years. It is possible to freely fold and deform the shape and size of the item to be packaged, which is difficult to implement in an eco-friendly and thick corrugated board, and can exhibit self-adhesive power.When sealing, it is possible to use only a certain pressure at room temperature without using a separate adhesive means. Its purpose is to provide an eco-friendly, self-adhesive and sealed paper packaging material that dramatically improves ease of use so that the product can be adhesively sealed safely and conveniently by simply pressing the edge portion.

The self-adhesive and sealed eco-friendly paper packaging material of the present invention for achieving such an object is, basically, the adhesive composition that exhibits an adhesive strength of a degree that the paper is destroyed during hibernation and maintains the adhesive strength over time. This self-adhesive and sealed eco-friendly paper packaging material is applied on one side of kraft paper, but it is an ethylene vinyl acetate (EVA: Ethylene Vinyl) that is friendly and has excellent cohesiveness and adhesion as an adhesive to increase the adhesion between paper and polyisoprene. Acetate) is mixed at a mixing ratio of 90:10 to an aqueous adhesive made of natural latex, and 20% by weight of SBR synthetic latex having a Tg (glass transition temperature) of -10 to 0°C is mixed to increase the adhesive strength. An adhesive formed by mixing 5% by weight of a non-phthalate plasticizer and 1.5% by weight of an amine-based anti-aging agent is applied to one side of the kraft paper to prevent the adhesive from aging. .

In addition, the 10% by weight of ethylene vinyl acetate, which is used to prevent tearing of the coating film while increasing the adhesion to the paper, which is the kraft paper, is used as 60 to 80% by weight of vinyl acetate and ethylene monomer (Ethylene). Monomer) 10-20wt% and polyvinyl alcohol (PVA) 10-20wt% are mixed to synthesize an emulsion type resin.

In particular, the 90% by weight of polyisoprene is a natural latex adhesive having a Tg of -40 to 60°C so that it has excellent adhesion to the copper surface and does not exhibit adhesive properties with other adherends, and the lack of adhesive properties of the natural latex Synthetic latex used to compensate for Tg maintains properties of -10~0℃. In addition, the plasticizer that exhibits the flexibility is a non-phthalate-based plasticizer that gives tack to the surface of the adhesive to keep the coating smooth so that the adhesive properties can be exhibited even under a small pressure, and the amine-based anti-aging agent is natural latex and synthetic latex. There is also a technical feature of improving the aging phenomenon generated by reacting with oxygen in the air, so that the adhesive strength decreases over time.

The self-adhesive and sealed eco-friendly paper packaging material of the present invention formed from the above-described elements is an eco-friendly and environmentally friendly, but difficult to implement in thick corrugated board, as an alternative to the environmentally polluted vinyl packaging material. Since self-adhesiveness can be exerted while deformable, the product can be packaged and sealed safely and conveniently according to the shape of the product by simply pressing the edge part at room temperature with a certain pressure without using a separate bonding means during sealing. So that the usability can be dramatically improved.

In other words, it is simpler and can replace vinyl packaging with the base paper of self-adhesive corrugated cardboard as an alternative item due to the restriction on the use of vinyl, which is a recent environmental issue. It will be a packaging material, and its physical properties do not stick to the product, so it can be widely and conveniently used for packaging of any product except for products that are vulnerable to breakage.

In particular, it can be used for all individual packaging, and if it is produced in various standards and sold in small packages, general consumers will be able to use it easily, and it is expected that the consumption of a considerable amount of vinyl discharged from home can be drastically reduced. If it is produced in large rolls, it can be delivered to places where it is consumed in large quantities. In addition, since 100g paper and 300g paper are mainly used, including 80g paper with a large amount of pulp, you can expect tough strength (durability) similar to that of vinyl, and use it as a cushioning material that can be recycled in various ways if it is crumpled. Value is expected.

This can be used for packaging products that are not greatly damaged by external impacts, such as books and clothing, and if produced in various standards and distributed in small packages (e.g., large rolls), general consumers can easily purchase them and conveniently It will be able to be used, and furthermore, as an alternative that can drastically reduce the consumption of a significant amount of vinyl discharged from home, the provided effect will be tremendous.

1 is a working state of preparing self-adhesively sealed eco-friendly paper packaging material according to the present invention according to the size of an article to be packaged and spreading it straight on the floor.
Figures 2 and 3 are a working state of folding the paper packaging material in half by placing an article on the adhesive surface of the self-adhesive and sealed eco-friendly paper packaging material produced according to the present invention.
Figures 4a and 4b is a self-adhesive sealed eco-friendly paper packaging of the present invention by directly rubbing the edge portion of the packaging material around the article or pushing it with a tool such as a roller to seal the article itself Work condition diagram.

Hereinafter, the specific members of the self-adhesive and sealed eco-friendly paper packaging material of the present invention will be described in more detail through test results and drawings of preferred embodiments.

For reference, as a result of running through machine manufacturing until the stage of recognizing and packaging books or objects of different sizes, a problem was found that cannot be packaged when the product is thick or when the size is large. However, due to the characteristic of self-adhesive corrugated cardboard, it has the advantage that it can provide a buffering effect for product protection.However, due to the nature of corrugated cardboard, the cut surface is not neat and can be folded only by inserting a cut line, and it is not a soft material that can cut hands. Several unexpected problems such as, etc. can be called disadvantages.

So, as a result of contemplating and researching convenient packaging methods in various ways, simple packaging was performed with paper coated with natural latex, which is the pre-production stage of self-adhesive corrugated cardboard. Accordingly, if the plastic packaging material is replaced with a base paper (basically kraft paper) of self-adhesive corrugated cardboard as a replacement item due to the restrictions on the use of vinyl, which is a more convenient and recent environmental issue, various forms along with enormous energy savings for corrugated board production. It will be an innovative individual packaging material, and the present invention was developed with the focus on the fact that it can be widely and conveniently used for packaging of any product except for products that are vulnerable to breakage because it has a property that does not stick to the product physically.

This can be used for packaging products that are not greatly damaged by external shocks, such as books and clothing, and if they are produced in various sizes and distributed in small packages (e.g., large rolls), they can be easily purchased and used conveniently by general consumers. In addition, the effect of providing it as an alternative that can drastically reduce the consumption of a significant amount of vinyl discharged from home will be great.

Importantly, in order for the self-adhesive and sealed eco-friendly paper packaging material of the present invention to function normally, the adhesive applied to one side of kraft paper, which is the base paper of the eco-friendly paper packaging material, does not have a problem as an adhesive component of the packaging material, and its effect should be exhibited. Accordingly, the most preferable components and composition ranges of the adhesive according to the experiment of various examples below by the present applicant could be confirmed.

First, in order to select a resin that needs self-adhesiveness in order to exhibit adhesion by pressure during adhesion, it is a principle to select 300g Kraft Paper as the basic test object and conduct the adhesion test in a direction. When the surface tack was raised, the experiment was conducted to see if the self-adhesive property increased together, and the persistence of the adhesive strength was maintained through the prevention of aging of the adhesive. The results of the experiment are summarized below.

(1) Evaluation of adhesive properties

The evaluation method was to measure the adhesive strength at the time of peeling after applying dry adhesive 10㎛ to 300g paper, drying -> co-face bonding (based on room temperature).

Target Example 1 Example 2 Example 3 Example 4 Example 5 Poly Isoprene 100 95 90 85 80 EVA 5 10 15 20 Paper seating Good Peeling Partial peeling Good Good Good Adhesion (g/inch) 1,500 1,400 1,350 1,300 1,270 1,200 Example 6 Example 7 Example 8 Example 9 Example 10 Example 11 Poly Isoprene 75 70 65 60 55 50 EVA 25 30 45 40 45 50 Paper seating Good Good Good Good Good Good Adhesion (g/inch) 1,160 1,000 900 820 700 540

In the above examples, the target is a foreign product currently coated on 300g cover paper, and isoprene is a synthetic latex whose Tg (glass transition temperature) is -40~60℃, and the Tg of EVA is about 0~10. to be.

As a result of the above test, in the case of Poly Isoprene, the self-adhesion property was good, but the film itself was peeled off due to the lack of settling with the paper. If the paper is poorly settled, the finished product may be completely peeled off the paper, so it seemed difficult to use it alone.

When mixing with EVA, the seating with the paper is improved, but self-adhesiveness is gradually lowered. In addition, another formulation capable of reinforcing adhesion was added to the formulation of Example 3, and the test results are as follows.

Example 12 Example l Example 13 Example 14 Example 15 Example 16 Example 17 Poly Isoprene 90 90 90 90 90 90 EVA 10 10 10 10 10 10 SBR 1 10 20 30 SBR 2 10 20 30 Paper seating Good Good Good Good Good Good Adhesion (g/inch) 1,300 1,280 1,250 1,350 1,420 1,410

In the above examples, SBR 1,2 is a synthetic Latex, and Tg is 0 to 10°C and -10 to 0°C, respectively. As a result of the test, the low Tg SBR showed good results in more physical properties, but slightly insufficient in the desired adhesive strength.

(2) Test to increase adhesive strength by applying surface tack

Following the above evaluation of the adhesive properties, an experiment was conducted to confirm whether the flexibility increased due to the addition of a plasticizer and the surface tack was increased, and thus the effect of increasing the self-adhesive properties could be seen, and the test results are as follows.

Example 18 Example 19 Example 20 Example 21 Example 22 Poly Isoprene 90 90 90 90 90 EVA 10 10 10 10 10 SBR 2 20 20 20 20 20 Plasticizer One 3 5 7 9 Paper seating Good Good Good Good Good Adhesion (g/inch) 1,470 1,560 1,670 1,650 1,650

The plasticizer used in the above examples was a plasticizer of the NON-phthalate series. Looking at the test results, it was confirmed that the surface tack was increased according to the plasticizer content, and Example 20 showed the most good physical properties, and it was confirmed that there was no significant change in adhesion because the effect fell from above a certain content. .

(3) Improvement test to improve adhesion over time

The effect of increasing the surface tack and increasing the adhesion by using a plasticizer was confirmed. In the case of poly isoprene, aging occurs due to oxygen, ozone, alkali, ultraviolet rays, wind speed, etc., but it is a method of stopping the chain reaction that is automatically oxidized, and additional tests are conducted by adding an anti-aging agent to improve adhesion over time. I did. As a result, when the adhesive properties were the best, it was attempted to confirm the change in adhesive force over time in Example 20.

As a test condition, 300g kraft paper was applied with a dry thickness of 10㎛. After covering the transparent film to prevent dust from getting on the surface, it was exposed to sunlight for a long time, and then the adhesion was measured, and the change in adhesion strength over time was confirmed from the initial adhesion.

Example 20 Initial adhesion 1,670 1 week later 1,500 2 weeks later 1,320 3 weeks later 1,100 4 weeks later 950

As a result of the test, it was confirmed that the adhesive properties deteriorate as time passed. Therefore, in Example 20, an experiment was conducted to confirm the effect by adding an anti-aging agent to examine the change in adhesion with time, and the results are as follows.

Target Example 22 Example 23 Example 24 Example 25 Example 26 Poly Isoprene 90 90 90 90 90 EVA 10 10 10 10 10 SBR 2 20 20 20 20 20 Plasticizer 5 5 5 5 5 Anti-aging agent 0.5 One 1.5 2 2.5 Adhesion
(g/inch) Early 1,500 1,670 1,670 1,670 1,670 1,650 Week 1 1,500 1,600 1,650 1,670 1,670 1,650 2nd week 1,450 1,350 1,620 1,660 1,660 1,630 Week 3 1,450 1,230 1,550 1,660 1,660 1,620 Week 4 1,420 1,100 1,520 1,650 1,650 1,620

Usually, phenolic and amine-based anti-aging agents are mainly used, but since amine-based is more excellent in terms of anti-aging properties, tests were conducted using amine-based anti-aging agents in the examples of this experiment.

As a result of the test, the measurement was carried out until the 4th week, and it was confirmed that the change over time of the adhesive force by the anti-aging agent was reduced. In particular, the content of Example 24 seems to be the best, and if the content is too high, the change over time is good, but the initial adhesive strength decreases, so it can be seen that selection of an appropriate content is important.

For reference, the adhesive applied on one side of the kraft paper, which is a corrugated base paper constituting the self-adhesive and sealed eco-friendly paper packaging material of the present invention, is basically a gravure-based coating and is simply as it is on 300g kraft paper (300g paper), an eco-friendly paper packaging material. It is sufficient to coat and dry. At this time, the adhesive property to be coated with natural latex alone may be good, but a phenomenon of sticking to the back side called blocking phenomenon occurs.This part is mixed with EVA resin and synthetic latex with a lower Tg. By doing so, it was intended to give the effect of improving the blocking at a level where the adhesive property did not decrease significantly.

The important point of this physical property is that as the thickness of the paper increases, the lipid of the paper becomes stronger, so unless it exhibits a certain level of adhesion, it does not show the degree of adhesion of the paper and peels as it is. In order to improve, the best self-adhesive and sealable eco-friendly paper packaging material of the present invention can be exhibited normally through the above examples tested by adding synthetic latex, plasticizer, etc. to exert adhesion at the level of destruction of paper. It was possible to judge the composition of the differentiated and specialized adhesive that can be used. This is to prove objectively that the aging phenomenon is improved by adding antioxidants against aging, which is the biggest disadvantage of ordinary latex-based adhesives, and that there is no significant difference between the initial adhesion and the adhesion after time. have.

Claims (4)

The adhesive composition is applied to one side of kraft paper, which is an eco-friendly paper packaging material that is self-adhesive and sealed, while exhibiting adhesive strength at the level of destruction of paper during hibernation adhesion and maintaining adhesion over time. Adhesion to a water-based adhesive made of natural latex component by mixing ethylene vinyl acetate (EVA: Ethylene Vinyl Acetate) at a mixing ratio of 90:10 to increase the adhesion between polyisoprene, which has excellent cohesion and adhesion, and paper. To increase the strength, mix 20% by weight of SBR synthetic latex with a Tg (glass transition temperature) of -10 to 0°C, and then mix 5% by weight of a non-phthalate plasticizer to increase the self-adhesive properties by increasing the flexibility of the adhesive. And, in order to prevent the aging of the adhesive, an adhesive formed by mixing 1.5% by weight of an amine-based anti-aging agent is applied to one side of the kraft paper. The method according to claim 1,
The 10% by weight of ethylene vinyl acetate, which is used to prevent tearing of the coating film while increasing the adhesion to the paper, which is the kraft paper, is 60 to 80 wt% of vinyl acetate and ethylene monomer ) Eco-friendly paper packaging material that is self-adhesive and sealed, characterized in that it is an emulsion-type resin synthesized by mixing 10-20wt% and 10-20wt% of polyvinyl alcohol (PVA). The method according to claim 1,
The 90% by weight of polyisoprene is a natural latex adhesive with a Tg of -40 to 60°C so that it has excellent adhesion to the copper surface and does not exhibit adhesive properties with other adherends, and supplements the insufficient adhesive properties of the natural latex. The synthetic latex used for this purpose is self-adhesive and sealed eco-friendly paper packaging, characterized in that the Tg maintains properties of about -10 to 0℃. The method according to claim 1,
The plasticizer that exhibits the flexibility is a non-phthalate plasticizer that gives a tack to the surface of the adhesive to keep the coating soft so that the adhesive properties can be exhibited even under a small pressure, and the amine-based anti-aging agent is composed of natural latex and synthetic latex. A packaging material having a self-adhesive sealing and shock absorption function, characterized in that the aging phenomenon generated by reacting with oxygen in the air is improved, and accordingly, the adhesive strength decreases over time.

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