High-flatness, high-barrier, high-strength and cooking-resistant stretch film and production method thereof

A high barrier and flatness technology, applied in chemical instruments and methods, layered products, flat products, etc., can solve problems that affect product information reading, be easily restricted by thickness, and affect the appearance of aesthetics, so as to improve the aesthetics of packaging , the cooling effect is uniform, and the finished product is flat and beautiful

Inactive Publication Date: 2020-11-27
SUNRISE PACKAGING MATERIAL JIANGYIN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Curly packaging not only affects the aesthetics of the appearance, but also affects the reading of product information when purchasing
Although there is a way of cover film / bottom film curling relative to each other to reduce this effect to varying degrees, but because curling is related to thickness, it is easy to be limited by thickness, and the thickness of the cover bottom is required to be the same or very similar

Method used

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  • High-flatness, high-barrier, high-strength and cooking-resistant stretch film and production method thereof
  • High-flatness, high-barrier, high-strength and cooking-resistant stretch film and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A high-flatness, high-barrier, high-strength, retort-resistant stretch film, such as figure 1 as shown, figure 1 It is a structural schematic diagram of the high-flatness, high-barrier, high-strength retort-resistant stretched film of the present invention. From top to bottom are the outer layer 101, the first outer layer 102, the second outer layer 103, the first adhesive layer 104, the first PA layer 105, the high barrier layer 106, the second PA layer 107, the second The adhesive layer 108, the second heat-sealing layer 109, the first heat-sealing layer 110, and the heat-sealing layer 111 are all made of PP , the first adhesive layer 104 and the second adhesive layer 108 are made of maleic anhydride-modified polyethylene resin, and the first PA layer 105 and the second PA layer 107 are made of PA, so The raw material of the high barrier layer 106 is EVOH, the raw materials of the second heat-sealing layer 109, the first heat-sealing layer 110, and the heat-sealing ...

Embodiment 2

[0055] A high-flatness, high-barrier, high-strength, retort-resistant stretched film, from top to bottom is the outer layer 101, the first outer layer 102, the second outer layer 103, the first adhesive layer 104, and the first PA layer 105, high barrier layer 106, second PA layer 107, second adhesive layer 108, second heat seal layer 109, first heat seal layer 110, heat seal layer 111, the outer surface layer 101, first time The raw materials of the outer layer 102 and the second outer layer 103 are all PP, and the first adhesive layer 104 and the second adhesive layer 108 are made of maleic anhydride-modified polyethylene resin. The first PA The raw materials of the layer 105 and the second PA layer 107 are PA, the raw materials of the high barrier layer 106 are EVOH, and the raw materials of the second heat-seal layer 109, the first heat-seal layer 110, and the heat-seal layer 111 are all Using PE, the product structure is PP / PP / PP / TIE / PA / EVOH / PA / TIE / PE / PE / PE.

[0056] The...

Embodiment 3

[0063] A high-flatness, high-barrier, high-strength, retort-resistant stretched film, from top to bottom is the outer layer 101, the first outer layer 102, the second outer layer 103, the first adhesive layer 104, and the first PA layer 105, high barrier layer 106, second PA layer 107, second adhesive layer 108, second heat seal layer 109, first heat seal layer 110, heat seal layer 111, the outer surface layer 101, first time The raw materials of the outer layer 102 and the second outer layer 103 are all PP, and the first adhesive layer 104 and the second adhesive layer 108 are made of maleic anhydride-modified polyethylene resin. The first PA The raw materials of the layer 105 and the second PA layer 107 are PA, the raw materials of the high barrier layer 106 are EVOH, and the raw materials of the second heat-seal layer 109, the first heat-seal layer 110, and the heat-seal layer 111 are all Using PE, the product structure is PP / PP / PP / TIE / PA / EVOH / PA / TIE / PE / PE / PE.

[0064] The...

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Abstract

The invention discloses a high-flatness, high-barrier, high-strength and cooking-resistant stretch film. The film sequentially comprises an outer surface layer, a primary outer layer, a secondary outer layer, a first bonding layer, a first PA layer, a high-barrier layer, a second PA layer, a second bonding layer, a secondary heat-seal layer, a primary heat-seal layer and a heat-seal layer from topto bottom, the structure of the product is PP/PP/PP/TIE/PA/EVOH/PA/TIE/PE/PE/PE; according to the invention, the film curling degree caused by the structure can be reduced; the preparation method provided by the invention uses a tape casting process for production; most of the selected materials are low in crystallization degree, rapid crystallization can be achieved, the influence of secondary crystallization of the materials on film curling can be reduced, and through selection of the raw materials, integration of excellent properties such as high barrier, high strength and steaming resistance is achieved.

Description

technical field [0001] The invention belongs to the technical field of films, and in particular relates to a high-flatness, high-barrier, high-strength, retort-resistant stretchable film for food packaging that requires retort sterilization and high shelf-life requirements, and a production method thereof. Background technique [0002] Processed meat will be packaged with films containing PA / EVOH materials due to the requirements of flavor preservation, quality preservation, and ease of transportation and storage. Due to the packaging requirements of the contents, these films need to be sterilized by medium temperature or high temperature cooking. Films produced by conventional processes, usually due to the nature of the material, will naturally curl the film. In addition, films produced from conventional materials are often prone to curling after cooking. Curly packaging not only affects the aesthetics of the appearance, but also affects the reading of product information...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/12B32B27/30B32B27/32B32B27/34B32B33/00B29D7/01
CPCB32B27/08B32B27/12B32B27/32B32B27/34B32B27/306B32B33/00B29D7/01B32B2250/24B32B2307/7242B32B2307/558B32B2307/306B32B2439/70
Inventor 杨伟徐平许君尉
Owner SUNRISE PACKAGING MATERIAL JIANGYIN CO LTD
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