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A heat-sealable water-based anti-fog coating and its preparation method and application

An anti-fog coating, water-based technology, applied in the direction of rosin coatings, coatings, etc., can solve the problem of anti-fog coating can not be heat-sealed, can not be heat-sealed bags, etc., to achieve excellent anti-fog performance, high adhesion, heat sealing high intensity effect

Active Publication Date: 2022-02-01
上海都昱新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the anti-fog effect of fresh food packaging can be achieved by coating a very thin anti-fog coating on the packaging bag. The product is simply wrapped, but cannot be heat-sealed into bags

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment provides a heat-sealable water-based anti-fog coating, and its preparation method comprises the following steps:

[0028] (1) Weigh each raw material according to the following weight percentage: 20% of EVA resin, 3% of chlorinated polypropylene resin, 8% of tackifying resin, 8% of wetting and dispersing agent, 12% of water-based antifogging agent, and water-based anti-adhesive additive 1%, isopropanol 18%, and the balance is deionized water.

[0029] Wherein, the EVA resin is unmodified EVA, its vinyl acetate content is 20-40%, the softening point is 65-110°C, and the melting point is 80°C; in the chlorinated polypropylene resin, the chlorine content is 30%, The softening point is 70-100°C, and the melting point is 68°C. The tackifying resin is C5 petroleum resin with a softening point of 70-110°C and a melting point of 70-75°C. The wetting and dispersing agent is ZetaSperse3600 type dispersing agent. The water-based antifogging agent is sodium laury...

Embodiment 2

[0035] This embodiment provides a heat-sealable water-based anti-fog coating, and its preparation method comprises the following steps:

[0036] (1) Weigh each raw material according to the following weight percentage: EVA resin 25%, tackifying resin 8%, wetting and dispersing agent 8%, water-based antifogging agent 12%, water-based anti-adhesive additive 1%, isopropanol 16% , and the balance is deionized water.

[0037] Wherein, the EVA resin is EVA grafted with maleic anhydride; in the EVA grafted with maleic anhydride, the grafting rate of maleic anhydride is 0.85%, the softening point is 70-100°C, and the melting point is 80°C. The tackifying resin is a hydrogenated rosin resin with a softening point of 70-110°C and a melting point of 75-85°C. The wetting and dispersing agent is ZetaSperse3600 type dispersing agent. The water-based antifogging agent is fatty alcohol polyoxyethylene ether sodium sulfate; the water-based anti-adhesive additive is polyethylene wax dispersio...

Embodiment 3

[0043] This embodiment provides a heat-sealable water-based anti-fog coating, and its preparation method comprises the following steps:

[0044] (1) Weigh each raw material according to the following weight percentage: EVA resin 25%, tackifying resin 8%, wetting and dispersing agent 8%, water-based antifogging agent 12%, water-based anti-adhesive additive 1%, isopropanol 16% , and the balance is deionized water.

[0045] Wherein, the EVA resin is chlorinated modified EVA; in the chlorinated modified EVA, the chlorine content is 10-30%, the softening point is 70-100°C, and the melting point is 85°C; the tackifying resin is terpene phenolic The resin has a softening point of 70-110°C and a melting point of 75-85°C. The wetting and dispersing agent is ZetaSperse3600 type dispersing agent. The water-based anti-fogging agent is fatty alcohol polyoxyethylene ether sodium sulfate; the water-based anti-adhesive additive is polyethylene wax dispersion with a melting point of 110°C, a...

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Abstract

The invention is applicable to the field of anti-fog technology, and provides a heat-sealable water-based anti-fog coating and a preparation method and application thereof. The heat-sealable water-based anti-fog coating includes the following raw materials in weight percentage: 15-30% of EVA resin, 0-10% of chlorinated polypropylene resin, 5-10% of tackifying resin, 6-10% of wetting and dispersing agent %, water-based antifogging agent 10~20%, water-based anti-adhesive additive 1~2%, isopropanol 0~20%, and the balance is water. The invention solves the difficulty that ordinary anti-fog coatings cannot be heat-sealed, and the base material has wide adaptability, can be adapted to various types of transparent base materials, has high adhesion to the base material, good transparency of the coating, and heat It has the characteristics of high sealing strength and excellent anti-fog performance.

Description

technical field [0001] The invention belongs to the field of anti-fog technology, and in particular relates to a heat-sealable water-based anti-fog coating and its preparation method and application. Background technique [0002] Fresh food is usually stored in packaging bags. Because fruits and vegetables breathe and volatilize water vapor, mist will be generated in the packaging bag, and when it is cold, it will condense and form water droplets. Bacteria multiply, leading to rot and deterioration. In addition, in the process of transportation, refrigeration and sales of fresh products, due to repeated changes in the temperature difference between the inside and outside of the packaging bag, and fresh products contain a lot of water, it is easy to generate fog in the packaging bag, which will also affect consumers' observation of the packaging. internal goods. The traditional method is to punch air holes in the packaging bag to emit water vapor and slow down the rotting s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D123/08C09D151/06C09D123/28C09D157/02C09D193/04C09D161/14C09D7/20C09D7/63C09D7/65
CPCC09D123/0853C09D151/06C09D123/28C09D7/20C09D7/63C09D7/65C08L2201/10C08L2205/035C08L2205/03C08L57/02C08L23/28C08K5/41C08K5/20C08L93/04C08L71/02C08L23/06C08L61/14
Inventor 张人华许期斌
Owner 上海都昱新材料科技有限公司