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Heat-shrinkable bag for packaging marine product

A heat-shrinking, seafood technology, used in packaging, wrapping paper, layered products, etc., can solve the problems of low shrinkage, large shrinkage force, and poor barrier properties.

Inactive Publication Date: 2012-04-11
SUZHOU TIPACK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a multi-layer co-extruded heat shrinkable bag for seafood packaging, which aims to effectively overcome the low shrinkage rate and large shrinkage force of the existing multi-layer co-extruded nylon heat-shrinkable bag , Poor barrier property, brittle at low temperature and other technical defects, better meet the requirements for the use of seafood fresh-keeping shrink packaging

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] First prepare the raw materials of each layer, core layer B: 49kg of VDC-MA copolymer and 1kg of epoxidized soybean oil. Surface layer A: 40kg of ethylene-octene-1 copolymer and 60kg of ethylene-vinyl acetate copolymer, the density of ethylene-octene-1 copolymer is 0.90g / cm 3 , the density of ethylene-vinyl acetate copolymer is 0.935 g / cm 3 . Heat seal layer C: 70kg of ethylene-octene-1 copolymer and 29kg of LLDPE, the density of ethylene-octene-1 is 0.89g / cm 3 , the density of LLDPE is 0.917g / cm 3 , 1kg processing aid; adhesive layer D and adhesive layer E: 12kg of EVA, density 0.935g / cm 3 .

[0023] The raw materials of each layer are added to the extruder of each layer to melt and plasticize, and then enter a multi-layer co-extrusion circular die to distribute the melt to form a multi-layer circular melt tube; The body tube blank is cooled and formed by vacuum sizing, and then enters the hot water tank to be heated to a suitable blowing temperature, and the com...

Embodiment 2

[0025] Prepare the raw materials of each layer first, core layer B: 49kg of VDC-MA copolymer and 1kg of epoxy soybean oil. Surface layer A: 40kg of ethylene-hexene-1 copolymer and 60kg of ethylene-vinyl acetate copolymer, the density of ethylene-hexene-1 copolymer is 0.91g / cm 3 , the density of ethylene-vinyl acetate copolymer is 0.935 g / cm 3 . Heat seal layer C: 70kg of ethylene-hexene-1 copolymer and 29kg of LLDPE, the density of ethylene-hexene-1 is 0.91g / cm 3 , the density of LLDPE is 0.917g / cm 3 , 1kg processing aid; adhesive layer D and adhesive layer E: 12kg of EVA, density 0.935g / cm 3 .

[0026] Other methods and structures are the same as in Example 1.

Embodiment 3

[0028] Prepare the raw materials of each layer first, core layer B: 49kg of VDC-MA copolymer and 1kg of epoxy soybean oil. Surface layer A: 40kg of ethylene-octene-1 copolymer and 60kg of ethylene-vinyl acetate copolymer, the density of ethylene-octene-1 copolymer is 0.90g / cm 3 , the density of ethylene-vinyl acetate copolymer is 0.935 g / cm 3 . Heat seal layer C: 70kg of ethylene-octene-1 copolymer and 29kg of VLDPE, the density of ethylene-octene-1 is 0.89g / cm 3 , the density of VLDPE is 0.905g / cm 3 , 1kg processing aid; adhesive layer D and adhesive layer E: 12kg of EVA, density 0.935g / cm 3 .

[0029] Other methods and structures are the same as in Example 1.

[0030] After testing, the main performance indicators of the heat-shrinkable bag for seafood packaging obtained by adopting the technical solution of the present invention are shown in Table 1.

[0031] Table 1

[0032] Test items Example 1 Example 2 Example 3 Longitudinal and tr...

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Abstract

The utility model relates to a heat-shrinkable bag for packaging a marine product, which comprises a surface layer, a core layer and a heat sealing layer, wherein the surface layer and the heat sealing layer are respectively boned with the core layer through bonding layers. The heat-shrinkable bag for packaging the marine product is characterized in that the core layer is made of mixtures consisting of 98 percent of polyvinyl dichloride (PVDC) resin and 2 percent of processing adjuvant by weight, the PVDC resin consists of vinylidene dichloride-methyl acrylate (VDC-MA) copolymers, and the processing adjuvant consists of epoxidized soybean oil or other plasticizer systems; the surface layer is made of resin a and resin b, the resin a consists of ethylene-alpha olefin copolymers or mixtures formed by kinds of ethylene-alpha olefin copolymers, and the resin b consists of ethylene-vinyl acetate copolymers; and the heat sealing layer is made of resin e, resin c and resin d, the resin e consists of ethylene-alpha olefin copolymers or mixtures formed by kinds of ethylene-alpha olefin copolymers, the resin c consists of one or mixtures of linear low density polyethylene (LLDPE), very low density polyethylene (VLDPE) and linear medium density polyethylene (LMDPE), and the resin d consists of processing adjuvant using polyolefin as a carrier. The heat-shrinkable bag has excellent heat sealing performance and excellent anti-piercing performance, and is very suitable for the preservative and shrinking packaging of marine products, especially tunas.

Description

technical field [0001] The invention relates to a heat-shrinkable film, in particular to a heat-shrinkable bag used for packaging seafood, and belongs to the technical field of plastic products and packaging materials. Background technique [0002] The film produced with polyamide as the main resin has natural shrinkage at room temperature; the shrink film processed with polyvinylidene chloride resin as the main raw material has the disadvantages of difficult processing, large equipment investment, and environmental pollution. Such as Japan Kureha Chemical Industry Co., Ltd.'s "stretched multi-layer film casing and its preparation method", the publication number is CNI 252348A; the "multi-layer heat-shrinkable film" of the U.S. Cliovac company, the publication number is CNI 1 90367A; the "heat-shrinkable multilayer film" of Kureha Chemical Industry Co., Ltd. of Japan, the publication number is CNI 365886A; the "multilayer heat-shrinkable film" of Greece Sporos Co. Heat shri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D30/02B65D65/40B65D81/24B32B27/08B32B27/18
Inventor 冯春张建岭
Owner SUZHOU TIPACK
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