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Low temperature dried pressure-sensitive adhesive and its prepn process and coating method on polylactic film

A pressure-sensitive adhesive and drying technology, applied in the direction of coating, etc., can solve the problems of not being able to adapt to the requirements of the pressure-sensitive tape production process, and achieve the effects of improving working conditions, ensuring product quality, and expanding the scope of use

Inactive Publication Date: 2007-12-19
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent publication No. CN1250065A jointly applied by Japan Mitsubishi Gas Chemical Co., Ltd. and Japan Starlight Co., Ltd. specifically studies the heat resistance of polylactic acid. The obtained results show that the maximum Vicat softening point of polylactic acid resin is only 88°C, which is far from being able to adapt to pressure. Requirements for the existing production process of sensitive tape

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1. A pressure-sensitive adhesive with a mass ratio of 30 parts of polyacrylate and 100 parts of ethyl acetate is placed in a reaction vessel, and ethyl acetate is volatilized at 80°C. After the ethyl acetate has volatilized completely, After cooling down to 50°C, add a replacement solvent, the replacement solvent is acetone and hexane, the mass ratio of acetone to hexane is 1:2; the mass ratio of the replacement solvent is 100 parts,

[0016] Stir evenly to obtain a low-temperature drying pressure-sensitive adhesive.

[0017] After coating a 70um polylactic acid film substrate with this adhesive system, it is dried by a box oven type drying and heating equipment, and the coating amount is 25g / m 2 , The drying process temperature from the inlet to the outlet is 40°C, 40°C, 50°C, 50°C, 40°C. A polylactic acid film coated with a low-temperature drying pressure-sensitive adhesive was obtained. The measured peel strength was 0.13 KN / m.

Embodiment 2

[0018] Example 2. A pressure-sensitive adhesive with a mass ratio of 60 parts of polymethacrylate and 100 parts of ethyl acetate is placed in a reaction vessel, and ethyl acetate is volatilized at 80° C., and the ethyl acetate is completely volatilized Finally, after cooling down to 50°C, add a replacement solvent, the replacement solvent is acetone and hexane, the mass ratio of acetone and hexane is 1:2; the mass ratio of the replacement solvent is 100 parts, stir well, and obtain a low-temperature drying Pressure sensitive adhesive.

[0019] The adhesive system is coated with a 70um polylactic acid film substrate and then dried through a box oven type drying and heating equipment, and the coating amount is 50g / m 2 , The drying process temperature from the inlet to the outlet is 60°C, 60°C, 70°C, 60°C, 50°C. A polylactic acid film coated with a low-temperature drying pressure-sensitive adhesive was obtained. The measured peel strength was 1.21 KN / m.

Embodiment 3

[0020] Example 3. A pressure-sensitive adhesive with a mass ratio of 40 parts of polyethyl acrylate and 100 parts of ethyl acetate is placed in a reaction vessel, and ethyl acetate is volatilized at 80°C until the ethyl acetate is volatilized completely Finally, after cooling down to 50°C, add a replacement solvent, the replacement solvent is acetone and hexane, the mass ratio of acetone and hexane is 1:2; the mass ratio of the replacement solvent is 100 parts, stir well, and obtain a low-temperature drying Pressure sensitive adhesive.

[0021] The adhesive system is coated with a 70um polylactic acid film substrate and then dried through a box oven type drying and heating equipment, and the coating amount is 40g / m 2 , The drying process temperature from the inlet to the outlet is 55°C, 55°C, 65°C, 55°C, 45°C. A polylactic acid film coated with a low-temperature drying pressure-sensitive adhesive was obtained. The measured peel strength was 0.92KN / m.

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Abstract

The present invention belongs to the field of pressure-sensitive adhesive, and is especially one kind of solution type low temperature acrylate adhesive. The solution type low temperature acrylate adhesive consists of acrylate copolymer colloid and mixed solvent comprising acetone and hexae. The adhesive is suitable for pressure-sensitive adhesive product operated at temperature below 70 deg.c, and may be dried completely at the temperature in saving of energy source.

Description

technical field [0001] The invention relates to a low-temperature drying pressure-sensitive adhesive, a preparation method and a method for coating polylactic acid film, belonging to the technical field of polymer processing. Background technique [0002] Due to its unique performance and characteristics, pressure-sensitive adhesives have become the most used and widely used products in adhesives. Its products are widely used in packaging, automobiles, transportation, communications, electrical appliances, building materials, machinery, aviation, light industry, health and other fields. At present, the domestic annual output has reached more than 400,000 tons. Among them, acrylic pressure-sensitive adhesives have become the fastest-growing main product in pressure-sensitive adhesives due to their superior performance, convenient operation, and low price. Its products include three categories: pressure-sensitive adhesive tape, pressure-sensitive adhesive label paper and pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/08C09D7/02C09D7/45
Inventor 刘南安冉祥海韩常玉董丽松
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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