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Heat-sealing coating for aluminum foil meal box and preparation method of heat-sealing coating

A lunch box, aluminum foil technology, applied in the direction of coating, can solve the problems of poor resistance to boiling, acid resistance, low heat sealing strength, etc., and achieve the effects of excellent comprehensive performance, enhanced peel strength, and enhanced bonding strength.

Pending Publication Date: 2022-02-01
清远慧谷新材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems that the existing heat-sealing materials for aluminum foil lunch boxes have low heat-sealing strength to PP and PE films, poor boiling resistance, retort resistance and acid resistance, the invention provides a heat-sealing coating for aluminum foil lunch boxes and a preparation method thereof

Method used

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  • Heat-sealing coating for aluminum foil meal box and preparation method of heat-sealing coating
  • Heat-sealing coating for aluminum foil meal box and preparation method of heat-sealing coating
  • Heat-sealing coating for aluminum foil meal box and preparation method of heat-sealing coating

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preparation example Construction

[0038] On the other hand, an embodiment of the present invention also provides a method for preparing the above-mentioned heat-sealing coating for aluminum foil lunch boxes, comprising the following steps:

[0039] Mix polyolefin dispersion and tackifying resin, stir at 400-600rpm for 20-30min;

[0040] Then add deionized water, n-butanol, defoamer, and curing agent, stir at 400-600 rpm for 20-30 minutes, and filter with a 400-mesh filter cloth to obtain the heat-sealing coating for aluminum foil lunch boxes.

Embodiment 1

[0045] This embodiment is used to illustrate the heat-sealing coating for aluminum foil lunch boxes disclosed by the present invention and its preparation method, comprising the following steps:

[0046]Step 1: According to the components and mass ratios listed in Example 1 in Table 1, under the mixer in the starting state of the mixing tank, add polyolefin dispersion and tackifying resin, and stir at 500 rpm for 20 minutes to obtain a mixture.

[0047] Step 2: According to the components listed in Example 1 in Table 1 and the mass ratio, deionized water, n-butanol, defoamer, and curing agent were put into the mixture, and dispersed for 20 minutes at a rotating speed of 600 rpm to obtain premix.

[0048] Step 3: Filter the above-mentioned premix with a 400-mesh filter cloth to obtain a heat-sealing coating for aluminum foil lunch boxes.

Embodiment 2～5

[0050] Embodiments 2 to 5 are used to illustrate the heat-sealing coating for aluminum foil lunch boxes disclosed by the present invention and its preparation method, including most of the operating steps in Embodiment 1, the difference being:

[0051] In the step 1 and the step 2, the components and mass ratios listed in Examples 2-5 in Table 1 were used to prepare heat-sealing coatings for aluminum foil lunch boxes.

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Abstract

In order to overcome the problems of low heat-sealing strength of the existing aluminum foil meal box heat-sealing material on PP and PE films and poor boiling resistance, steaming resistance and acid resistance, the invention provides a heat-sealing coating for an aluminum foil meal box, the heat-sealing coating comprises the following components in parts by mass: 40-60 parts of polyolefin dispersion; 4-8 parts of a curing agent; 15-25 parts of tackifying resin; and 10-30 parts of deionized water. The invention also provides a preparation method of the heat-sealing coating for the aluminum foil meal box. The heat-sealing coating obtained by coating the inner wall of the aluminum foil meal box with the heat-sealing coating has excellent flexibility, meets the tensile deformation capacity of the aluminum foil meal box in use, is excellent in high-temperature boiling resistance and acetic acid boiling resistance, can be subjected to heat-sealing adhesion with PP and PE laminated adhesives at 160-230 DEG C, and the meal box after heat sealing has excellent air tightness.

Description

technical field [0001] The invention belongs to the field of coatings for metal packaging materials, and in particular relates to a heat-sealing coating for aluminum foil lunch boxes and a preparation method thereof. Background technique [0002] As the country and society have stricter food safety and hygiene requirements, and people's awareness of environmental protection and resource conservation has increased, aluminum foil lunch boxes, as green packaging materials, are becoming a new choice for the catering industry and food packaging industry. The aluminum foil lunch box has good airtightness and can maintain the integrity of the food. After the food is packed, it is heat-sealed with a sealing machine. During the process of catering, storage and transportation, if someone opens it, it cannot be restored. [0003] In the prior art, the heat-sealing materials used in aluminum foil lunch boxes are mainly PP and PE film-coated materials. PP film has excellent processabilit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D123/26C09D7/65
CPCC09D123/26C09D7/65C08L2203/30C08L2201/14C08L61/32C08L31/04C08L93/04C08L61/24
Inventor 冀伟强张启禄李垒
Owner 清远慧谷新材料技术有限公司
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