CN116285784A - A kind of plasticizer-resistant hot-melt pressure-sensitive adhesive and preparation method thereof - Google Patents

Abstract

The present invention relates to the technical field of adhesives, in particular to a plasticizer-resistant hot-melt pressure-sensitive adhesive and a preparation method thereof; a plasticizer-resistant hot-melt pressure-sensitive adhesive, comprising the following raw materials in parts by mass : 80‑120 parts of acrylic copolymer, 7‑12 parts of polyvinyl chloride, 10‑15 parts of nitrile rubber, 1‑6 parts of tackifier, 18‑28 parts of polypropylene, 13‑23 parts of silane coupling agent, bamboo 1-3 parts of fiber, 10-18 parts of kaolin, 20-30 parts of starch adhesive; in this application, by improving the raw material of the hot-melt pressure-sensitive adhesive, the hot-melt pressure-sensitive adhesive of the application can be effectively resistant to growth for a long time The migration of the plasticizer makes the prepared hot-melt pressure-sensitive adhesive have excellent initial tack, peel strength and high stickiness.

Description

A kind of plasticizer-resistant hot-melt pressure-sensitive adhesive and preparation method thereof

technical field

The invention relates to the technical field of adhesives, in particular to a plasticizer-resistant hot-melt pressure-sensitive adhesive and a preparation method thereof.

Background technique

Hot-melt pressure-sensitive adhesive is an adhesive based on thermoplastic polymers. It integrates the characteristics of hot-melt adhesives and pressure-sensitive adhesives. It is solvent-free, pollution-free, and easy to use; Light finger pressure is all it takes to bond.

PVC protective film is a kind of plastic protective film, which is calendered by polyvinyl chloride and plasticizer, heat stabilizer, modifier, ultraviolet absorber, etc. It is softer and has better mechanical properties than PE film. PVC protective film can be made into a protective film with better performance requirements than PE film according to different formulations, and is used to protect materials with special requirements.

When using the existing PVC protective film, it is necessary to coat the surface of the PVC protective film with a hot-melt pressure-sensitive adhesive to adhere to the board. When the PVC protective film coated with hot-melt pressure-sensitive adhesive is stored, some additives in the PVC protective film, such as plasticizers, easily migrate from the inside of the PVC protective film to the adhesive layer, which causes the adhesive layer of the PVC protective film to fall off, making the The viscosity is reduced; if the PVC protective film coated with hot-melt pressure-sensitive adhesive is directly attached to the board, defects such as residual glue and ghosting are likely to occur.

Therefore, how to prepare a plasticizer-resistant hot-melt pressure-sensitive adhesive has become a problem to be solved by many manufacturers.

Contents of the invention

In view of the deficiencies in the prior art, the present application provides a plasticizer-resistant hot-melt pressure-sensitive adhesive and a preparation method thereof.

In the first aspect, the application provides a plasticizer-resistant hot-melt pressure-sensitive adhesive, which adopts the following technical scheme:

A plasticizer-resistant hot-melt pressure-sensitive adhesive, comprising the following raw materials in parts by mass: 80-120 parts of acrylic acid copolymer, 7-12 parts of polyvinyl chloride, 10-15 parts of nitrile rubber, 1-12 parts of tackifier 6 parts, polypropylene 18-28 parts, silane coupling agent 13-23 parts, bamboo fiber 1-3 parts, kaolin 10-18 parts, starch adhesive 20-30 parts.

Preferably, the acrylic acid copolymer comprises the following raw materials in parts by mass: 40-50 parts of acrylic acid, 24-35 parts of methacrylic acid, 20-30 parts of butyl acrylate, 12-20 parts of ethyl acrylate, 8-18 parts of vinyl acetate share.

In this application, through the improvement of the raw material of hot-melt pressure-sensitive adhesive, after adding bamboo fiber and silane coupling agent to react, after reacting with polypropylene and polyvinyl chloride, due to the diffusion of water molecules in the composite raw material, its diffusion The speed is lower than the movement speed of polypropylene molecular chains. The thermal stress caused by the performance difference between bamboo fiber and polypropylene can guide the thermal movement of polypropylene molecular chains, promote the rearrangement of molecular chain movement, eliminate internal thermal stress, and improve mechanical properties to a certain extent. Therefore, the added bamboo fiber can significantly reduce the tensile strength loss rate and bending strength loss rate of the raw material mixture, thereby improving the anti-aging performance of the hot-melt pressure-sensitive adhesive and effectively prolonging the life of the hot-melt pressure-sensitive adhesive. service life.

In this application, through the improvement of raw materials, adding kaolin can be filled between bamboo fibers, which can effectively prevent bamboo fibers from being evenly dispersed in the mixture due to the presence of strong hydrogen bonds. In addition, the added kaolin After reacting with the silane coupling agent, the surface of kaolin has many polar groups, which improves the molecular polarity of the raw material mixture, making it have a strong interaction with the laminated board, and is easy to bond with the laminated board. A large number of hydrogen bonds are formed between them, so that the cohesion of the raw material mixture is increased, and the initial adhesion and peel strength of the product are effectively improved.

In this application, through the improvement of the raw materials, the added starch adhesive reacts with the silane coupling agent, and the silane coupling agent combines with the starch adhesive to form a network structure, which improves the stability and bonding performance of the starch adhesive. Improves the tack of hot melt pressure sensitive adhesives.

By adopting the above-mentioned technical scheme, in the present application, by adding bamboo fiber, kaolin, starch adhesive, after reacting with acrylic acid copolymer, polyvinyl chloride, nitrile rubber, tackifier, polypropylene by silane coupling agent, pressure can be adjusted. The initial adhesion and peel strength properties of the sensitive adhesive finally make the hot-melt pressure-sensitive adhesive of the present application effectively resistant to plasticizer migration for a long time, so that the prepared hot-melt pressure-sensitive adhesive has excellent initial adhesion, peel strength and High viscosity and other properties.

In a specific embodiment, the hot-melt pressure-sensitive adhesive further includes 5-10 parts by mass of guar gum.

By adopting the above technical scheme, the added guar gum reacts with the starch adhesive modified by the silane coupling agent, which can effectively delay the aging of the hot-melt pressure-sensitive adhesive, improve the aging resistance of the hot-melt pressure-sensitive adhesive, and effectively Extends the service life of hot melt pressure sensitive adhesives.

In a specific embodiment, the hot-melt pressure-sensitive adhesive further includes 4-14 parts by mass of tannin.

By adopting the above technical scheme, the added tannin reacts with the starch adhesive modified by the silane coupling agent, and the hydroxyl group in the tannin molecule can combine with the free amino group of the protein in the starch adhesive modified by the silane coupling agent, Thereby promoting the cross-linking between each protein to strengthen the network structure of the protein and improve the viscosity of the hot melt pressure sensitive adhesive.

In a specific embodiment, the hot-melt pressure-sensitive adhesive further includes 2-6 parts by mass of antioxidant.

Preferably, the antioxidant is any one of the antioxidant 1010, the antioxidant 168, the antioxidant 1076, and the antioxidant 1726.

Preferably, the tackifier is rosin pentaerythritol ester or petroleum resin.

In the second aspect, the present application provides a method for preparing a plasticizer-resistant hot-melt pressure-sensitive adhesive, which adopts the following technical scheme:

A preparation method of a plasticizer-resistant hot-melt pressure-sensitive adhesive, the preparation steps are as follows:

(1) take the raw material of hot-melt pressure-sensitive adhesive by proportioning;

(2) After mixing acrylic copolymer, polyvinyl chloride, nitrile rubber, tackifier, polypropylene, silane coupling agent, bamboo fiber, kaolin, and starch adhesive, add guar gum, tannin, antioxidant Agents are mixed to obtain hot-melt pressure-sensitive adhesives.

Preferably, the reaction temperature is 100-200° C., and the stirring speed is 60-120 rpm.

By adopting the above-mentioned technical scheme, in the present application, by adding bamboo fiber, kaolin, starch adhesive, guar gum, tannin, antioxidant, by silane coupling agent and acrylic acid copolymer, polyvinyl chloride, nitrile rubber, After the adhesive and polypropylene are reacted, the initial tack and peel strength properties of the pressure-sensitive adhesive can be adjusted, the bonding strength and anti-aging performance of the pressure-sensitive adhesive can be improved, and finally the hot-melt pressure-sensitive adhesive of the present application can be effectively durable for a long time. The migration of the plasticizer can effectively prevent the influence of the plasticizer on the pressure-sensitive adhesive layer caused by the precipitation of the plasticizer from the PVC base film layer; the prepared hot-melt pressure-sensitive adhesive has excellent initial tack, peel strength and high stickiness.

The pressure-sensitive adhesive prepared by this application can effectively prevent and reduce the peeling of the pressure-sensitive adhesive layer, and when the PVC protective film coated with the pressure-sensitive adhesive is directly attached to the board, it can effectively reduce the occurrence of residual glue and ghost images on the board. chance of defects.

In summary, the present application includes at least one of the following beneficial technical effects:

In this application, by improving the raw material of hot-melt pressure-sensitive adhesive, adding bamboo fiber, kaolin, starch adhesive, guar gum, tannin, antioxidant, through silane coupling agent and acrylic acid copolymer, polyvinyl chloride, butyl After the reaction of nitrile rubber, tackifier, and polypropylene, the initial adhesion and peel strength properties of the pressure-sensitive adhesive can be adjusted, and finally the hot-melt pressure-sensitive adhesive of the present application can effectively resist plasticizer migration for a long time, and the prepared Hot melt pressure sensitive adhesive has excellent initial tack, peel strength and high tack.

Detailed ways

The raw materials involved in this application all adopt commercially available products, wherein,

Nitrile rubber was purchased from Jiangsu Guanlian New Material Technology Co., Ltd.; petroleum resin was purchased from Jiangsu Plus Biotechnology Co., Ltd.; bamboo fiber was purchased from Qingdao Yushengbang Textile Co., Ltd.; kaolin was purchased from Changzhou Rongao Chemical New Materials Co., Ltd.; corn starch adhesive was purchased from Suzhou Yisaixin Chemical Technology Co., Ltd.; guar gum was purchased from Jiangsu Ruiduo Bioengineering Co., Ltd.; tannin was purchased from Shandong Guohua Chemical Co., Ltd.; Agent 1010 was purchased from Changzhou Youfeng Chemical Co., Ltd.; the polyvinyl chloride CAS registration number is 9002-86-2.

The present application will be described in further detail below in conjunction with examples and comparative examples.

Preparation of Acrylic Copolymer:

Preparation example 1:

After mixing 40g of acrylic acid, 24g of methacrylic acid, 20g of butyl acrylate, 12g of ethyl acrylate and 8g of vinyl acetate, add 2g of azobisisobutyronitrile and blow in nitrogen gas, heat up to 80°C for 4 hours, add Take 2 g of azobisisobutyronitrile, raise the temperature to 88° C., and react for 1 hour to obtain an acrylic acid copolymer.

Preparation example 2:

After mixing 45g of acrylic acid, 29g of methacrylic acid, 25g of butyl acrylate, 16g of ethyl acrylate and 13g of vinyl acetate, add 2g of azobisisobutyronitrile and pass in nitrogen gas, heat up to 80°C for 4 hours, add Take 2 g of azobisisobutyronitrile, raise the temperature to 88° C., and react for 1 hour to obtain an acrylic acid copolymer.

Preparation example 3:

After mixing 50g of acrylic acid, 35g of methacrylic acid, 30g of butyl acrylate, 20g of ethyl acrylate and 18g of vinyl acetate, add 2g of azobisisobutyronitrile and pass in nitrogen gas, heat up to 80°C for 4 hours, add Take 2 g of azobisisobutyronitrile, raise the temperature to 88° C., and react for 1 hour to obtain an acrylic acid copolymer.

Preparation of hot melt pressure sensitive adhesive:

Example 1:

A preparation method of a plasticizer-resistant hot-melt pressure-sensitive adhesive, the preparation steps are as follows:

(1) take the raw material of hot-melt pressure-sensitive adhesive by proportioning;

(2) 80 parts of acrylic copolymer, 7 parts of polyvinyl chloride, 10 parts of nitrile rubber, 1 part of tackifier, 18 parts of polypropylene, 13 parts of silane coupling agent, 1 part of bamboo fiber, 10 parts of kaolin, starch 20 parts of the adhesive are mixed to obtain a hot-melt pressure-sensitive adhesive.

Wherein, the heating temperature is 110° C., and the stirring speed is 90 rpm.

In this embodiment, the acrylic acid copolymer is obtained from Preparation Example 1; the tackifier is petroleum resin; the starch adhesive is corn starch adhesive; the silane coupling agent is silane coupling agent KH570.

Example 2:

A preparation method of a plasticizer-resistant hot-melt pressure-sensitive adhesive, the preparation steps are as follows:

(1) take the raw material of hot-melt pressure-sensitive adhesive by proportioning;

(2) 100 parts of acrylic copolymer, 10 parts of polyvinyl chloride, 12 parts of nitrile rubber, 3 parts of tackifier, 20 parts of polypropylene, 17 parts of silane coupling agent, 2 parts of bamboo fiber, 14 parts of kaolin, starch 25 parts of the adhesive are mixed to obtain a hot-melt pressure-sensitive adhesive.

Wherein, the heating temperature is 110° C., and the stirring speed is 90 rpm.

In this example, the acrylic acid copolymer is obtained from Preparation Example 2; the tackifier is petroleum resin; the starch adhesive is corn starch adhesive; the silane coupling agent is silane coupling agent KH570.

Example 3:

A preparation method of a plasticizer-resistant hot-melt pressure-sensitive adhesive, the preparation steps are as follows:

(1) take the raw material of hot-melt pressure-sensitive adhesive by proportioning;

(2) 120 parts of acrylic copolymer, 12 parts of polyvinyl chloride, 15 parts of nitrile rubber, 6 parts of tackifier, 28 parts of polypropylene, 23 parts of silane coupling agent, 3 parts of bamboo fiber, 18 parts of kaolin, starch 30 parts of the adhesive are mixed to obtain a hot-melt pressure-sensitive adhesive.

Wherein, the heating temperature is 110° C., and the stirring speed is 90 rpm.

In this example, the acrylic acid copolymer is obtained from Preparation Example 3; the tackifier is petroleum resin; the starch adhesive is corn starch adhesive; the silane coupling agent is silane coupling agent KH570.

Example 4:

A preparation method of a plasticizer-resistant hot-melt pressure-sensitive adhesive, the preparation steps are as follows:

(1) take the raw material of hot-melt pressure-sensitive adhesive by proportioning;

(2) 100 parts of acrylic copolymer, 10 parts of polyvinyl chloride, 12 parts of nitrile rubber, 3 parts of tackifier, 20 parts of polypropylene, 17 parts of silane coupling agent, 2 parts of bamboo fiber, 14 parts of kaolin, starch Mix 25 parts of adhesive, add 5 parts of guar gum, 4 parts of tannin, and 2 parts of antioxidant, and mix to obtain a hot-melt pressure-sensitive adhesive.

Wherein, the heating temperature is 110° C., and the stirring speed is 90 rpm.

In this example, the acrylic acid copolymer is obtained from Preparation Example 1; the antioxidant used is antioxidant 1010; the tackifier is petroleum resin; the starch adhesive is corn starch adhesive; the silane coupling agent is silane coupling agent KH570.

Example 5:

A preparation method of a plasticizer-resistant hot-melt pressure-sensitive adhesive, the preparation steps are as follows:

(1) take the raw material of hot-melt pressure-sensitive adhesive by proportioning;

(2) 100 parts of acrylic copolymer, 10 parts of polyvinyl chloride, 12 parts of nitrile rubber, 3 parts of tackifier, 20 parts of polypropylene, 17 parts of silane coupling agent, 2 parts of bamboo fiber, 14 parts of kaolin, starch Mix 25 parts of adhesive, add 7 parts of guar gum, 9 parts of tannin, and 4 parts of antioxidant, and mix to obtain a hot-melt pressure-sensitive adhesive.

Wherein, the heating temperature is 110° C., and the stirring speed is 90 rpm.

Acrylic acid copolymer in this example is obtained from Preparation Example 2; the antioxidant used is antioxidant 1010; the tackifier is petroleum resin; the starch adhesive is corn starch adhesive; the silane coupling agent is silane coupling agent KH570.

Embodiment 6:

A preparation method of a plasticizer-resistant hot-melt pressure-sensitive adhesive, the preparation steps are as follows:

(1) take the raw material of hot-melt pressure-sensitive adhesive by proportioning;

(2) 100 parts of acrylic copolymer, 10 parts of polyvinyl chloride, 12 parts of nitrile rubber, 3 parts of tackifier, 20 parts of polypropylene, 17 parts of silane coupling agent, 2 parts of bamboo fiber, 14 parts of kaolin, starch 25 parts of adhesive are mixed, 10 parts of guar gum, 14 parts of tannin, and 6 parts of antioxidant are added and mixed to obtain a hot-melt pressure-sensitive adhesive.

Wherein, the heating temperature is 110° C., and the stirring speed is 90 rpm.

Acrylic acid copolymer in this example is obtained from Preparation Example 3; the antioxidant used is antioxidant 1010; the tackifier is petroleum resin; the starch adhesive is corn starch adhesive; the silane coupling agent is silane coupling agent KH570.

comparative example

Comparative example 1:

The main difference with embodiment 2 is: do not add bamboo fiber.

Comparative example 2:

The main difference with embodiment 2 is: do not add kaolin.

Comparative example 3:

The main difference with Example 2 is: no starch adhesive is added.

Comparative example 4:

The main difference with embodiment 5 is: do not add bamboo fiber.

Comparative example 5:

The main difference with embodiment 5 is: do not add kaolin.

Comparative example 6:

The main difference with Example 5 is: no starch adhesive is added.

Performance testing:

1. The 180-degree peel strength, initial tack, and stickiness of the hot-melt pressure-sensitive adhesives prepared in Examples 1-6 and the samples prepared in Comparative Examples 1-6 are tested for performance, and the detection method is as follows:

(1) 180-degree peel strength: measured according to GB/T 2792-2014 "Pressure-sensitive adhesive tape 180-degree peel strength test method".

(2) Initial tack: Tested according to GB/T4852-2002 "Pressure-sensitive adhesive tape initial tack test method (rolling ball method)" standard;

(3) Stickiness: Tested according to GB/T4851-1998 "Test Method for Stickiness of Pressure-Sensitive Adhesive Tapes".

Table 1 performance test data

结合表1、实施例1-6、对比例1-6可知，实施例1-6制备得到的热熔压敏胶，其初粘力、剥离强度、持粘性均优于对比例1-6制备得到的样品，并且经过60天后，其初粘力、剥离强度、持粘性均未发生变化，说明本申请中通过对配方的改进，最终使得本申请的热熔压敏胶能够长时间有效的耐增塑剂迁移，制备得到的热熔压敏胶具有优异的初粘性，剥离强度和高持粘性等性能，有效阻止和减少压敏胶层脱落。

In combination with Table 1, Examples 1-6, and Comparative Examples 1-6, it can be seen that the hot-melt pressure-sensitive adhesives prepared in Examples 1-6 have better initial adhesion, peel strength, and stickiness than those prepared in Comparative Examples 1-6. Obtained sample, and after 60 days, its initial adhesion, peel strength, and stickiness have not changed, indicating that the application is passed through the improvement of the formula, and finally the hot-melt pressure-sensitive adhesive of the application can be effectively durable for a long time. The plasticizer migrates, and the prepared hot-melt pressure-sensitive adhesive has excellent initial tack, peel strength and high stickiness, etc., which can effectively prevent and reduce the peeling off of the pressure-sensitive adhesive layer.

In conjunction with Examples 1-3 and Examples 4-6, it can be seen that the hot-melt pressure-sensitive adhesives prepared in Examples 4-6 have initial adhesion, peel strength, and stickiness that are better than those in Examples 1-3. Strength, peel strength, stickiness, indicating that in this application, by improving the formula, adding guar gum, tannin, and antioxidant, the initial tack, peel strength, and stickiness of the hot-melt pressure-sensitive adhesive are effectively improved.

In conjunction with Example 2 and Comparative Example 1, it can be known that the hot-melt pressure-sensitive adhesive obtained in Example 2 has initial tack, peel strength, and tack retention, which are better than those of Comparative Example 1, peel strength, and tack retention. The added bamboo fiber can significantly reduce the tensile strength loss rate and bending strength loss rate of the raw material mixture, thereby improving the anti-aging performance of the hot-melt pressure-sensitive adhesive and effectively prolonging the service life of the hot-melt pressure-sensitive adhesive.

Know in conjunction with embodiment 2, comparative example 2, the hot-melt pressure-sensitive adhesive that embodiment 2 obtains, its initial tack, peel strength, stickiness, all are better than comparative example 2 initial tack, peel strength, stickiness, illustrate adding Kaolin can increase the cohesion of the raw material mixture and effectively improve the initial adhesion and peel strength of the product.

Know in conjunction with embodiment 2, comparative example 3, the hot-melt pressure-sensitive adhesive that embodiment 2 obtains, its initial tack, peel strength, stickiness, are all better than comparative example 3 initial tack, peel strength, stickiness, illustrate adding Starch adhesive, which improves the stability and bonding performance of starch adhesive, so that the viscosity of hot melt pressure sensitive adhesive can be improved.

In conjunction with Example 5 and Comparative Example 4, it can be known that the hot-melt pressure-sensitive adhesive obtained in Example 5 has initial tack, peel strength, and tack retention, which are better than those of Comparative Example 4, peel strength, and tack retention. The added bamboo fiber can significantly reduce the tensile strength loss rate and bending strength loss rate of the raw material mixture, thereby improving the anti-aging performance of the hot-melt pressure-sensitive adhesive and effectively prolonging the service life of the hot-melt pressure-sensitive adhesive.

Know in conjunction with embodiment 5, comparative example 5, the hot-melt pressure-sensitive adhesive that embodiment 5 obtains, its initial tack, peel strength, stickiness, are all better than comparative example 5 initial tack, peel strength, stickiness, illustrate adding Kaolin can increase the cohesion of the raw material mixture and effectively improve the initial adhesion and peel strength of the product.

Know in conjunction with embodiment 5, comparative example 6, the hot-melt pressure-sensitive adhesive that embodiment 5 obtains, its initial tack, peel strength, stickiness, are all better than comparative example 6 initial tack, peel strength, stickiness, illustrate adding Starch adhesive, which improves the stability and bonding performance of starch adhesive, so that the viscosity of hot melt pressure sensitive adhesive can be improved.

2. Perform a performance test on the residual rate of the hot-melt pressure-sensitive adhesive prepared in Examples 1-6 and the samples prepared in Comparative Examples 1-6. The test method is as follows:

Residual rate: After aging at room temperature for 24 hours, the residual rate of the adhesive is tested, referring to GB/T4851-1998 "Pressure Sensitive Adhesive Tape Stickiness Test Method" standard for testing.

Table 2 Residual rate detection results

Residual rate (%) Example 1 0% Example 2 0% Example 3 0% Example 4 0% Example 5 0% Example 6 0% Comparative example 1 90% Comparative example 2 70% Comparative example 3 50% Comparative example 4 80% Comparative example 5 50% Comparative example 6 40%

In conjunction with Table 1, Examples 1-6, and Comparative Examples 1-6, it can be seen that the residual rate of the hot-melt pressure-sensitive adhesives prepared in Examples 1-6 is better than that of the samples prepared in Comparative Examples 1-6, indicating that the present application Through the improvement of the formula, the probability of defects such as residual glue and ghost images on the board is effectively reduced.

This specific embodiment is only an explanation of this application, and it is not a limitation of this application. Those skilled in the art can make modifications to this embodiment without creative contribution according to needs after reading this specification, but as long as the rights of this application All claims are protected by patent law.

Claims (9)

1. A plasticizer-resistant hot-melt pressure-sensitive adhesive, characterized in that it comprises the following raw materials in parts by mass: 80-120 parts of acrylic copolymer, 7-12 parts of polyvinyl chloride, 10-15 parts of nitrile rubber , 1-6 parts of tackifier, 18-28 parts of polypropylene, 13-23 parts of silane coupling agent, 1-3 parts of bamboo fiber, 10-18 parts of kaolin, 20-30 parts of starch adhesive. 2. A plasticizer-resistant hot-melt pressure-sensitive adhesive according to claim 1, wherein the acrylic acid copolymer comprises the following raw materials in parts by mass: 40-50 parts of acrylic acid, 24-35 parts of methacrylic acid , 20-30 parts of butyl acrylate, 12-20 parts of ethyl acrylate, and 8-18 parts of vinyl acetate. 3. A plasticizer-resistant hot-melt pressure-sensitive adhesive according to claim 1, characterized in that: the hot-melt pressure-sensitive adhesive further comprises 5-10 parts by mass of guar gum. 4. A plasticizer-resistant hot-melt pressure-sensitive adhesive according to claim 1, characterized in that: the hot-melt pressure-sensitive adhesive further comprises 4-14 parts by mass of tannin. 5. A plasticizer-resistant hot-melt pressure-sensitive adhesive according to claim 1, characterized in that: the hot-melt pressure-sensitive adhesive further comprises 2-6 parts by mass of an antioxidant. 6. A plasticizer-resistant hot-melt pressure-sensitive adhesive according to claim 5, wherein the antioxidant is antioxidant 1010, antioxidant 168, antioxidant 1076, and antioxidant 1726 any kind. 7. A plasticizer-resistant hot-melt pressure-sensitive adhesive according to claim 1, characterized in that: the tackifier is rosin pentaerythritol ester or petroleum resin. 8. A method for preparing the plasticizer-resistant hot-melt pressure-sensitive adhesive according to any one of claims 1-7, characterized in that the preparation steps are as follows: (1) Weigh the raw materials of the hot-melt pressure-sensitive adhesive according to the proportion; (2) After mixing acrylic copolymer, polyvinyl chloride, nitrile rubber, tackifier, polypropylene, silane coupling agent, bamboo fiber, kaolin, and starch adhesive, add guar gum, tannin, antioxidant Agents are mixed to obtain hot-melt pressure-sensitive adhesives. 9. The method according to claim 8, characterized in that: the reaction temperature is 100-200° C., and the stirring speed is 60-120 rpm.