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Method for preparing hot-sealing film

A film and coating technology, applied in the field of heat-sealing film preparation, can solve the problems of health hazards, environmental pollution, secondary pollution and other problems of surrounding personnel, and achieve the effects of moderate tensile strength, suitable barrier properties, and easy operation.

Active Publication Date: 2013-08-21
SHANDONG HENGLIAN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing process of producing heat-sealed regenerated cellulose film, the coatings used in the coating process are basically solvent-based. During the production process, the organic solvents volatilized into the air not only pose a hazard to the health of the surrounding personnel, but also have a The environment also causes certain pollution; during use, solvent residues are likely to cause secondary pollution of food, making it taste and deteriorate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] (1) Select cotton pulp with a weight ratio of 30% and wood pulp with a weight ratio of 70%, and make viscose through alkalization, pressing, aging, yellowing, dissolving, aging, filtration and defoaming. The viscose metering pump is pumped into the film former, and the film is formed by the former; the film is put into the desulfurization tank for desulfurization; after desulfurization, it is transferred to the bleaching tank for bleaching; the bleached film is washed with water and then plasticized. After chemical treatment, coating;

[0013] (2) For coating preparation, first add 0.3kg of slip agent and 8kg of demineralized water into the preparer, and stir for 5 minutes; then add 0.2kg of E wax emulsion, 80kg of water-based polyurethane, and 112kg of demineralized water into the preparer, and stir for 10 minutes. produced paint;

[0014] (3) Coating, add the prepared coating into the coating tank, control the vehicle speed at 60m / min, let the film pass through the c...

Embodiment 2

[0017] (1) Select cotton pulp with a weight ratio of 30% and wood pulp with a weight ratio of 70%, and make viscose through alkalization, pressing, aging, yellowing, dissolving, aging, filtration and defoaming. The viscose metering pump is pumped into the film former, and the film is formed by the former; the film is put into the desulfurization tank for desulfurization; after desulfurization, it is transferred to the bleaching tank for bleaching; the bleached film is washed with water and then plasticized. After chemical treatment, coating;

[0018] (2) For coating preparation, first add 0.35kg of slip agent and 8kg of demineralized water into the preparer, and stir for 5 minutes; then add 0.2kg of E wax emulsion, 82kg of water-based polyurethane, and 110kg of demineralized water into the preparer, and stir for 10 minutes. produced paint;

[0019] (3) Coating, add the prepared coating into the coating tank, control the vehicle speed at 65m / min, let the film pass through the ...

Embodiment 3

[0022] (1) Select cotton pulp with a weight ratio of 35% and wood pulp with a weight ratio of 65% to make viscose through alkalization, pressing, aging, yellowing, dissolving, aging, filtration and defoaming. The viscose metering pump is pumped into the film former, and the film is formed by the former; the film is put into the desulfurization tank for desulfurization; after desulfurization, it is transferred to the bleaching tank for bleaching; the bleached film is washed with water and then plasticized. After chemical treatment, coating;

[0023] (2) For coating preparation, first add 0.6kg of slip agent and 10kg of demineralized water into the preparer, and stir for 10 minutes; then add 0.4kg of E wax emulsion, 90kg of water-based polyurethane, and 100kg of demineralized water into the preparer, and stir for 10 minutes. produced paint;

[0024] (3) Coating, add the prepared coating into the coating tank, control the vehicle speed at 70m / min, let the film pass through the c...

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Abstract

The invention discloses a method for preparing a hot-sealing film. The method comprises the steps of selecting raw materials, preparing mucilage glue, regenerating cellulose, desulfurating, bleaching, plastifying, coating, drying and humidifying, wherein the coating step is completed by adding coating into a coating tank so that the film passes through the coating tank; in the event of coating, the turning speed is controlled within 60-80 m / min; the coating weight of the coating is controlled within 1.5-3.0 g / m2; and the coating comprises the raw materials consisting of waterborne polyurethane, a slip agent, E wax emulsion and softened water. The method disclosed by the invention has simple steps and is convenient to operate; the production process is free from pollution, secondary pollution on foods and the like cannot be caused in the application process, and the prepared hot-sealing film is degradable, so that the environment-friendly requirement is achieved; furthermore, the hot-sealing film is nontoxic, tasteless, proper in barrier property, good in hot-sealing property and proper in tensile strength and is capable of being applied to automatic high-speed packaging.

Description

technical field [0001] The invention relates to a preparation method of a heat-sealing film. Background technique [0002] Heat-sealable regenerated cellulose film has quickly replaced plastic film packaging materials and has become the main force in food packaging due to its natural degradable environmental advantages. In the existing process of producing heat-sealing regenerated cellulose film, the coatings used in the coating process are basically solvent-based. The environment also causes certain pollution; in the process of use, solvent residues can easily cause secondary pollution of food, making it stale and spoiled. SUMMARY OF THE INVENTION [0003] The object of the present invention is to provide a preparation method of a heat-sealing film. [0004] In order to achieve the above-mentioned purpose of the invention, the production steps adopted in the present invention include: raw material selection, viscose preparation, cellulose regeneration, desulfurization, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/12C08J7/04C08J7/00C08J5/18C08L1/24C09D175/04C09D7/12B65D65/42
CPCY02W90/10
Inventor 张晓煜王新王慧君许丽丽杨同仙
Owner SHANDONG HENGLIAN NEW MATERIALS CO LTD
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