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A soft pvc tape/protective film

A protective film, PVC resin technology, applied in the direction of adhesives, pressure-sensitive films/sheets, film/sheet adhesives, etc., can solve the problems of complicated manufacturing process and increased cost, and achieve the effect of preventing the migration of plasticizers

Active Publication Date: 2022-04-15
张进波
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the coating process is added to the process, the manufacturing process is complicated, and the cost increases

Method used

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  • A soft pvc tape/protective film
  • A soft pvc tape/protective film
  • A soft pvc tape/protective film

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1～4

[0024] According to the proportions in the table below, each component is fully mixed and swollen, and a film material with a thickness of 150 μm is made on a polymer calender.

[0025]

[0026] * Manufactured by Nissin Chemical Industry Co., Ltd.; a Diisooctyl phthalate; b Diisooctyl terephthalate.

Synthetic example 1

[0028] Configure a mixer, a reflux condenser, and a flask with a thermometer, add 41 parts of methyl acrylate, 44 parts of isooctyl acrylate, 13.5 parts of methyl methacrylate, 1.5 parts of acrylic acid, and 0.5 parts of initiator azoisobisbutyronitrile (AIBN). Parts, 70 parts of ethyl acetate, after mixing evenly, control the external temperature, keep the reflux state, and obtain the pressure-sensitive adhesive solution after 6 hours. After the reaction was completed, 50 parts of butyl acetate was added for dilution and stirring, and after further cooling to room temperature, 0.2 parts of the required curing agent aluminum acetylacetonate (dissolved in 30 parts of isopropanol) was added to obtain adhesive solution a. Theoretical glass transition temperature Tg~-20°C, theoretical acid value 12.7mgKOH / g, GPC test results: Mn=88600, Mw=621000, Mw / Mn=7.01.

Synthetic example 2

[0030]Configure a mixer, a reflux condenser, and a flask with a thermometer, add 38 parts of methyl acrylate, 46 parts of isooctyl acrylate, 13.5 parts of methyl methacrylate, 2.5 parts of acrylic acid, and 0.3 parts of initiator azoisobisbutyronitrile (AIBN) Parts, 70 parts of ethyl acetate, after mixing evenly, control the external temperature, keep the reflux state, and obtain the pressure-sensitive adhesive solution after 6 hours. After the reaction was completed, 50 parts of butyl acetate was added for dilution and stirring, and after further cooling to room temperature, 0.4 parts of the required curing agent aluminum acetylacetonate (dissolved in 30 parts of isopropanol) was added to obtain adhesive solution b. Theoretical glass transition temperature Tg~-25°C, theoretical acid value 18.0mgKOH / g, GPC test results: Mn=197000, Mw=690000, Mw / Mn=3.50.

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Abstract

The invention discloses a soft PVC adhesive tape / protective film, which comprises a PVC film base material and an acrylic pressure-sensitive adhesive coated on the surface of the PVC film base material, and the soft PVC film base material is composed of: PVC resin / vinyl chloride resin / plasticizer=80~90 / 10~20 / 30~60 (weight ratio), the glass transition temperature of the pressure-sensitive adhesive is -30~-10°C, and the number average molecular weight is 60000~250000, The molecular weight distribution is 2.0-10.0, and the acid value is 5-30 mgKOH / g. The soft PVC adhesive tape / protective film of the present invention, through the improvement of the manufacturing formula of the PVC film substrate, uses the plasticizer-resistant pressure-sensitive adhesive at the same time, under the one-step coating process, saves the primer process, and solves the problem of the plasticizer-resistant agent. The bonding force between the pressure-sensitive adhesive and the substrate prevents the damage of the adhesive / base interface over time, effectively prevents the migration of the plasticizer, and solves the problem of residual glue when the PVC tape and PVC protective film are peeled off.

Description

technical field [0001] The invention relates to the technical field of polyvinyl chloride film materials, in particular to a soft PVC adhesive tape / protective film. Background technique [0002] Polyvinyl chloride (PVC) membrane materials are usually divided into rigid polyvinyl chloride and soft polyvinyl chloride. Soft polyvinyl chloride PVC film is used as a general base material and can be widely used in the manufacture of labels, advertising stickers, transparent protective films and electrical tapes. Due to the plasticizer and other small molecules contained in the substrate, it is easy to migrate to the adhesive layer, resulting in a decrease in the peeling force and it is difficult to stick until it falls off. The development of plasticizer-resistant adhesives and the solution to the migration and penetration of plasticizers have become the field. two important issues. [0003] As the previous topic, under normal circumstances, acrylic pressure-sensitive adhesives ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/38C09J7/24C09J133/08C08L27/06C08K5/12C08J5/18
CPCC09J7/385C09J7/245C09J133/064C08J5/18C09J2427/006C09J2433/00C08J2327/06C08K5/12
Inventor 李燚汪冬朱晓春丁海霖
Owner 张进波
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