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Composite film for flour packaging and manufacturing method thereof

A manufacturing method and composite film technology, applied in packaging, wrapping paper, transportation and packaging, etc., can solve problems such as large amount of addition, influence on emulsion stability, emulsion breaking, etc., achieve good heat sealing performance, and simple and easy production process control effect

Active Publication Date: 2014-05-07
HAINAN SHINER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such as: adding conductive metal powder or conductive components such as carbon particles to acrylic emulsion, however, the amount added is relatively large, thereby reducing the transparency of the composite film; try adding ethylene oxide denatured dioctyl phthalate Plasticizer to prevent the generation of static electricity (Japanese Patent Publication No. 5-140519), however, adding this plasticizer can not fundamentally prevent the generation of static electricity, and its antistatic effect is not ideal; Korean Patent (publication No. 1973014) , describes the prevention of static electricity by adding plasticizers with ether bonds, alkali metal salts and quaternary ammonium salts, but since the addition of salts is very likely to affect the stability of the emulsion, and even cause the emulsion to break, it has not been obtained Widely used; Ciba in Switzerland, Cytec in the United States, and domestic chemical research institutes have all developed antistatic agent products by themselves, and solved the problem by adding antistatic agents, but the cost of antistatic agents is very high. compatibility is not good

Method used

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  • Composite film for flour packaging and manufacturing method thereof
  • Composite film for flour packaging and manufacturing method thereof
  • Composite film for flour packaging and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Manufacture raw material (weight percentage) according to following composition:

[0040]

[0041]

[0042] (1) Preparation of modified acrylic emulsion:

[0043] Add 0.51kg of sodium lauryl sulfate, 0.51kg of OP-10 and 0.3kg of potassium persulfate into the pre-emulsification tank in sequence, then add 250kg of deionized water, start stirring to fully dissolve the contents of the tank; Process ratio Add 60kg of acrylic acid, 80kg of ethyl acrylate, 40kg of methyl acrylate and 40kg of methyl methacrylate into the polymerization kettle in sequence, stir and emulsify for 15 minutes to obtain a pre-emulsion, and heat up to 70°C under nitrogen protection; in the polymerization kettle Add 1.5kg sodium lauryl sulfate, 1.5kg OP-10, 0.7kg potassium persulfate and 500kg deionized water in sequence; stir and heat up to 80°C, add 1kg of silicone defoamer, keep the temperature for 5 minutes, Use the installed plunger pump to slowly inject the contents of the pre-emulsificati...

Embodiment 2

[0049] Manufacture raw material (weight percentage) according to following composition:

[0050]

[0051] (1) Preparation of modified acrylic emulsion:

[0052] Add 0.1kg sodium lauryl sulfate, 0.2kg OP-10 and 0.05kg ammonium persulfate in turn into the pre-emulsification kettle, then add 44kg deionized water, start stirring to fully dissolve the contents of the kettle; according to the set specific Proportion of process Add 18.2kg of acrylic acid, 24kg of butyl acrylate, 8kg of methyl acrylate and 8kg of methyl methacrylate into the polymerization kettle in sequence, stir and emulsify for 20 minutes to obtain a pre-emulsion, and heat up to 70°C under nitrogen protection; Add 0.3kg of sodium lauryl sulfate, 0.4kg of OP-10, 0.15kg of ammonium persulfate and 90kg of deionized water in sequence; stir and heat up to 80°C, add 0.36kg of silicone defoamer, and keep the temperature constant for 5 minutes Finally, use the installed plunger pump to slowly inject the contents of the...

Embodiment 3

[0058] Manufacture raw material (weight percentage) according to following composition:

[0059]

[0060] (1) Preparation of modified acrylic emulsion:

[0061] Add 0.52kg of sodium lauryl sulfate, 0.52kg of OP-10 and 0.3kg of potassium persulfate to the pre-emulsification kettle in sequence, then add 230kg of deionized water, and start stirring to fully dissolve the contents of the kettle; Process ratio Add 100kg of acrylic acid, 80kg of ethyl acrylate, 30kg of methyl acrylate and 30kg of methyl methacrylate into the polymerization tank in sequence, stir and emulsify for 30 minutes to obtain a pre-emulsion, and heat up to 75°C under nitrogen protection; in the polymerization tank Add 0.52kg sodium lauryl sulfate, 0.52kg OP-10, 0.7kg potassium persulfate and 500kg deionized water in sequence; stir and heat up to 80°C, add 2kg of silicone defoamer, keep the temperature for 5 minutes, Use the installed plunger pump to slowly inject the contents of the pre-emulsification tank...

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Abstract

The invention relates to a composite film for flour packaging and a manufacturing method thereof. The composite film comprises three layers (figure. I), namely a PET (polythylene terephthalate) litho-coated thin film, a PE (polyethylene) thin film and a polyurethane adhesive layer arranged between the PET litho-coated thin film and the PET thin film, wherein the PET litho-coated thin film comprises three layers (figure. II), namely a PET coated thin film, a printed layer on the coated thin film and a polyurethane adhesive layer arranged between the PET coated thin film and the printed layer; the PET coated thin film comprises three layers (figure. III), namely a PET base material, a modified crylic acid coating layer on the surface of the base material and a polyurethane adhesive layer arranged between the PET base material and the modified crylic acid coating layer; the modified crylic acid coating layer is obtained by coating the surface of the PET base material with crylic acid emulsion through a coating technology; the modified crylic acid emulsion is prepared from the following raw materials in percentage by weight: 5-10 percent of a functional monomer, 8-12 percent of an adhesive monomer, 6-8 percent of a cohesion monomer, 0.02-0.08 percent of chondroitin sulfate, 0.2-0.5 percent of an emulsifier, 0.05-0.2 percent of a defoaming agent, 0.05-0.1 percent of an initiator, 0.02-0.1 percent of electrolyte, 1-3 percent of ammonia water and 67-75 percent of deionized water. The composite film disclosed by the invention can well achieve the effect of electrostatic dust (powder) absorption during flour packaging and is high in thermal sealing performance.

Description

Technical field [0001] The invention relates to a composite film used for flour packaging and a manufacturing method thereof, and belongs to the field of new polymer materials. Background technique [0002] Most packaging films are highly insulating substances. The higher the insulation of a substance, the easier it is to generate static electricity. Therefore, during the processing or application of the film, various disadvantages will be caused by electrostatic dust collection and electrostatic accumulation. For example, there may be potential safety hazards, endangering life or property. For example, the packaging film will affect the ink transfer during the printing process, and the so-called "static ink spot" or static "film whisker" such as uneven inking will appear, resulting in unclear printing patterns, or reducing the transparency of the packaging, directly affecting the quality of the product. Visual display effect. When packaging powders such as flour, the pac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/06B32B27/08B32B7/12B65D65/40
Inventor 洪景利宋军军
Owner HAINAN SHINER IND
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