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Adhesive for cooking packaging film and preparation method thereof

A technology of adhesives and composite films, applied in the direction of polymer adhesive additives, non-polymer adhesive additives, adhesive additives, etc., can solve problems such as insufficient high temperature resistance and poor material adaptability

Inactive Publication Date: 2017-05-31
SHANDONG ZHONGSU TAIFU TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of insufficient high temperature resistance and poor material adaptability in the adhesive for composite membranes in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The composition of adhesive for composite film comprises the following raw materials in parts by weight, 10 parts of isocyanate, 2 parts of 12-hydroxystearic acid, 3 parts of polyvinyl alcohol, 2 parts of methacrylate, 0.5 part of epoxy resin, 0.3 part Nano-alumina loaded with 5wt% hexamethylenediamine;

[0017] For the preparation of adhesives for composite films, heat the isocyanate to 80°C, add methacrylate, stir for 10 minutes, then add polyvinyl alcohol and 12-hydroxystearic acid, react at 105°C for 1 hour, cool to 95°C, add ring Oxygen resin and nano-alumina were stirred thoroughly for 30 minutes to prepare the adhesive.

Embodiment 2

[0019] The composition of adhesive for composite film comprises the following raw materials in parts by weight, 10 parts of isocyanate, 3 parts of 12-hydroxystearic acid, 5 parts of polyvinyl alcohol, 5 parts of methacrylate, 1 part of epoxy resin, 0.5 part Nano titanium oxide;

[0020] For the preparation of adhesives for composite films, heat the isocyanate to 90°C, add methacrylate, stir for 30 minutes, then add polyvinyl alcohol and 12-hydroxystearic acid, react at 100°C for 2 hours, cool to 90°C, add ring Oxygen resin and nano-alumina were stirred thoroughly for 30 minutes to prepare the adhesive.

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Abstract

The invention discloses an adhesive for a cooking packaging film. The adhesive is prepared from reactants of isocyanate, 12-hydroxystearic acid, polyvinyl alcohol, methacrylate, epoxy resin and a nano filling agent, wherein a mass ratio of the isocyanate, the 12-hydroxystearic acid and the polyvinyl alcohol is 1 to (0.1 to 0.5) to (0.1 to 1.0), and preferably, the mass ratio is 1 to (0.1 to 0.3) to (0.2 to 0.5); the dosage of the epoxy resin is 0.01 to 0.1 time of that the isocyanate; the dosage of the methacrylate is 0.2 to 0.6 time of that the isocyanate; the dosage of the nano filling agent is 0.01 to 0.05 time of that of the isocyanate. According to the adhesive disclosed by the invention, the problems that the adhesive for a cooking composite film is insufficient in high temperature resistance and poorer in material adaptability are solved, high-temperature-resisting cooking at 130 DEG C for 1 hour can be carried out, deformation and lamination cannot happen, the peeling strength after cooking is up to AD-502 / CAT-10, and the adhesive can be applied to adhesion of various organic materials.

Description

technical field [0001] The invention relates to an adhesive for a retortable flexible packaging composite film used for packaging food, more specifically a polyurethane adhesive for a naphthalene high-temperature retort composite film and a preparation method thereof. Background technique [0002] The so-called high-temperature cooking refers to the processing technology of food sterilization at a high temperature of 121-145°C and a steam pressure of 0.18-0.40MPa. High-temperature retort bag, also known as soft can, is an ideal packaging container due to its small size, light weight, convenient consumption and the combination of the advantages of canned containers and boiling water-resistant plastic bags. It is developed by the US Army Natick Research Institute It was successfully developed first, and was successfully applied to the Apollo Aerospace Project in 1969. In the same year, Japan's Toyo Can Manufacturing Co., Ltd. also put it on the market. Retort bags are mainly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C09J11/04C09J11/08C08G18/62C08G18/34
CPCC09J175/04C08G18/348C08G18/6212C08K2201/011C09J11/04C09J11/08C08L63/00C08K9/12C08K2003/2227C08K2003/2241
Inventor 王震尹强
Owner SHANDONG ZHONGSU TAIFU TECH
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