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Environment-friendly hot melt adhesive for wax cartons and preparation method thereof

A hot-melt adhesive and environment-friendly technology, applied in wax adhesives, adhesive types, adhesive additives, etc., can solve the problems of slow drying speed, complicated production process, and high temperature of hot-melt adhesives, and achieve fast adhesion The effects of joint operation, improved production efficiency, and short bonding time

Active Publication Date: 2020-06-05
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Shipping cartons must be able to withstand temperature, humidity changes and rough handling, which is more difficult with tape
At present, the starch adhesives used in the carton production industry are mainly made of raw materials such as starch, water, sodium hydroxide, and oxidants. The disadvantages are slow drying speed, low bonding strength, poor water resistance, and unstable storage performance. Coated or oil-based cardboard does not stick well
Although the bonding strength of sealing hot melt adhesives is better than that of starch adhesives, some hot melt adhesives are still not strong enough to stick waxed cartons. Secondly, most hot melt adhesives are used at a higher temperature and cannot meet the needs of waxed cartons. Requirements for the use of adhesives
Moreover, these hot melt adhesives also have problems such as complex production process, use of organic solvents, and high requirements for production equipment.
Existing carton adhesives have limited the application of wax cartons in the packaging production industry to a certain extent

Method used

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  • Environment-friendly hot melt adhesive for wax cartons and preparation method thereof
  • Environment-friendly hot melt adhesive for wax cartons and preparation method thereof
  • Environment-friendly hot melt adhesive for wax cartons and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] An environment-friendly hot-melt adhesive for waxed cartons, the preparation steps of which are as follows:

[0028] S1. Preparation of paraffin wax emulsion: put 16 parts of sliced ​​paraffin and 4 parts of compound emulsifier B in a reaction vessel, and raise the temperature to 75°C. After the paraffin is completely melted, start stirring. After stirring for 10 minutes, add dropwise at a rate of 2.0 mL / min 80 parts of deionized water heated to 75°C, continue to heat and stir at 75°C for 30min, and then cool the prepared paraffin emulsion to room temperature for later use; wherein, the composite emulsifier B is an alkylphenol polymer with a weight ratio of 11:9 A mixture of oxyethylene ether and Span 80;

[0029] S2. Compound emulsion preparation: Mix 28 parts of vinyl acetate, 3 parts of methyl methacrylate, 7 parts of butyl acrylate and 2 parts of acrylic acid to obtain a monomer mixture; dissolve 0.3 parts of potassium persulfate in 15 parts of deionized Prepare th...

Embodiment 2

[0032] An environment-friendly hot-melt adhesive for waxed cartons, the preparation steps of which are as follows:

[0033] S1. Preparation of paraffin wax emulsion: put 16 parts of sliced ​​paraffin and 10 parts of compound emulsifier B in a reaction vessel, and raise the temperature to 75°C. After the paraffin is completely melted, start stirring. After stirring for 10 minutes, add dropwise at a speed of 2.0 mL / min 74 parts of deionized water warmed up to 75°C, continue to heat and stir at 75°C for 45min, and then cool the prepared paraffin emulsion to room temperature for later use; wherein, the composite emulsifier B is an alkylphenol polymer with a weight ratio of 11:9 A mixture of oxyethylene ether and Span 80;

[0034] S2. Compound emulsion preparation: Mix 28 parts of vinyl acetate, 6 parts of methyl methacrylate, 4 parts of butyl acrylate and 2 parts of acrylic acid to obtain a monomer mixture; dissolve 0.2 parts of potassium persulfate in 15 parts of deionized Prepa...

Embodiment 3

[0037] An environment-friendly hot-melt adhesive for waxed cartons, the preparation steps of which are as follows:

[0038] S1. Preparation of paraffin emulsion: put 12 parts of sliced ​​paraffin and 8 parts of compound emulsifier B in a reaction vessel, and raise the temperature to 75°C. After the paraffin is completely melted, start stirring. After stirring for 10 minutes, add dropwise at a rate of 2.0 mL / min 80 parts of deionized water warmed up to 75°C, continue to heat and stir at 75°C for 60min, and then cool the prepared paraffin emulsion to room temperature for later use; wherein, the composite emulsifier B is an alkylphenol polymer with a weight ratio of 11:9 A mixture of oxyethylene ether and Span 80;

[0039] S2. Prepare composite emulsion: Mix 22 parts of vinyl acetate, 7.2 parts of methyl methacrylate, 5.8 parts of butyl acrylate and 5 parts of acrylic acid to obtain a monomer mixture; dissolve 0.2 parts of potassium persulfate in 15 parts of deionized Prepare th...

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Abstract

The invention discloses an environment-friendly hot melt adhesive for wax cartons and a preparation method of the hot melt adhesive, the hot melt adhesive is obtained by emulsion polymerization of vinyl acetate, methyl methacrylate, butyl acrylate and acrylic acid in paraffin emulsion, and dioctyl phthalate can be selectively added; the melting temperature of the environment-friendly hot melt adhesive for the wax carton ranges from 58 DEG C to 71 DEG C and is lower than or close to the temperature of a wax coating, and the wax coating on the surface of the wax carton can be effectively protected against damage in the bonding process; the solid hot melt adhesive is superior to commercially available common hot melt adhesives in T-shaped peel strength and single lap shear strength, meets therequirement for high bonding strength required by wax layers of wax cartons, has high cohesion strength, is not prone to damage, is good in liquidity in a molten state and short in bonding time, canachieve rapid bonding operation, and effectively improves production efficiency.

Description

technical field [0001] The invention relates to the technical field of hot-melt adhesives, in particular to an environment-friendly hot-melt adhesive for wax cartons and a preparation method thereof. Background technique [0002] With the improvement of the quality of life of modern people, the nationals have improved their awareness of the nutritional value of fresh vegetables, and the requirements for the freshness of fruits and vegetables have also increased. With the development of China's agricultural science and technology, domestic high-end agricultural products are also sold across the ocean to the world. For the food field, especially for the packaging of fresh food, not only must it have the basic functions of the packaging box, but also require it to have functions such as freshness preservation, waterproof, and anti-extrusion. Therefore, the wax carton will become an ideal environmentally friendly cold chain packaging. [0003] The waxed carton has a wax layer ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J131/04C09J191/06C09J11/08C09J11/06C08F218/08C08F220/14C08F220/18C08F220/06
CPCC08F218/08C08L2205/03C09J11/06C09J11/08C09J131/04C08L91/06C08L71/02C08K5/12
Inventor 郭敏杰郑娜王家泰周文雅马转弟王子珍
Owner TIANJIN UNIV OF SCI & TECH
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