A heat-shrinkable film suitable for automatic and rapid packaging in production lines

A heat-shrinkable film and production line technology, applied to layered products, synthetic resin layered products, sacks, etc., to achieve high strength, excellent machine performance, and reduce the risk of pollution

Active Publication Date: 2020-04-03
SUNRISE PACKAGING MATERIAL JIANGYIN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But there is no report about a kind of heat-shrinkable film suitable for automatic fast packaging of production line

Method used

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  • A heat-shrinkable film suitable for automatic and rapid packaging in production lines
  • A heat-shrinkable film suitable for automatic and rapid packaging in production lines

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] The heat-shrinkable film includes a surface layer 1 (PA), a structural layer 2 (PE), a barrier layer 3 (PA / EVOH / PA) from outside to inside, including an EVOH barrier middle layer 31 and barrier layer protection layers 32 on both sides. PA layer), heat seal layer 4 (POP+mLLDPE). The surface layer 1, the structural layer 2, the barrier layer 3 and the heat-sealing layer 4 are respectively connected by an adhesive resin 5 (Tie).

[0077] The specific membrane structure is: PA / Tie / PE / Tie / PA / EVOH / PA / Tie / POP+mLLDPE;

[0078] The PA of the surface layer 1 and the middle two layers are all blended by PA6, copolymerized PA and amorphous PA. The mass percentage of copolymerized PA in the resin of the PA layer is 10%, the content of 4POP in the heat-sealing layer is 90%, and the total thickness of the film is It is 75um. PE is a lower density (≤0.91g / cm 3 ) PE.

[0079] The production process includes the following steps:

[0080] S1: Place the raw materials in an extruder to...

Embodiment 2-4

[0084] The metallocene material mLLDPE is added to the heat-sealing layer, and the difference from Example 1 is that the contents of POP in the heat-sealing layer are 85%, 70%, and 50%, respectively.

Embodiment 5-8

[0086] There are two layers of PA in the surface layer and the middle layer, and the mass percentages of the resin copolymerized PA in the PA layer are 20%, 30%, 40%, and 50% respectively. The inflation ratio of the secondary inflation in S2 is 2.0-4.5, and the traction ratio is 3.0-3.5.

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Abstract

Disclosed is a thermal shrinkage film suitable for automatic and quick packaging in a production line, the thermal shrinkage film comprising a surface layer (1) on an outer surface, a heat sealing layer (4) on an inner surface, and a barrier layer (3) disposed between the surface layer (1) and the heat sealing layer (4), wherein the barrier layer (3) comprises an EVOH barrier intermediate layer (31), a protective layer (32) for the barrier layer is disposed on at least one side of the EVOH barrier intermediate layer (31), and the protective layer (32) for the barrier layer is a PA layer; the surface layer (1) is a PA layer; the heat sealing layer (4) is one of a POP layer, an mLLDPE layer, a ULDPE layer or a Surlyn resin layer, or a blended layer of POP and mLLDPE; and the surface layer (1) and the barrier layer (3) and the barrier layer (3) and the heat sealing layer (4) are respectively connected by means of an adhesive resin (5). The thermal shrinkable film has a good barrier performance, high strength and a good heat sealing performance, also has an excellent machinability performance, and is suitable for fully automatic online packaging, which changes the packaging mode and packaging efficiency of shrink bags.

Description

technical field [0001] The invention relates to the technical field of heat-shrinkable films, in particular to a heat-shrinkable film suitable for automatic and rapid packaging in a production line. Background technique [0002] Shrink film is widely used in the packaging of various products such as food, medicine, disinfection tableware, stationery and sports supplies, craft gifts, printed matter, hardware and plastic products, telephones, electronic appliances, etc. In terms of cluster) packaging, it can not only meet the functions of moisture-proof and dust-proof, anti-touch and stealing, transparent display and other functions of the product, but also increase the attractiveness of the product appearance, and can also be used to replace various cartons. The traditional shrink bag packaging method is inefficient and cannot realize online automatic packaging. [0003] Chinese patent document CN106739356 discloses a multi-layer co-extrusion shrink film, including a heat-se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B7/12B32B27/08B32B27/30B32B27/32B32B27/34B32B27/36B32B33/00
CPCB32B7/12B32B27/08B32B27/30B32B27/306B32B27/32B32B27/327B32B27/34B32B27/36B32B33/00B32B2250/24B32B2307/308B32B2307/558B32B2307/726B32B2439/06
Inventor 宋建新
Owner SUNRISE PACKAGING MATERIAL JIANGYIN CO LTD
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