Heat shrinkable film applicable to automatic quick packaging on production line

A heat shrinkable film, production line technology, applied in the direction of layered products, synthetic resin layered products, containers, etc., to achieve the effect of reducing operating procedures and steps, good heat sealing performance, and high barrier.

Active Publication Date: 2018-02-16
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 fil

Method used

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  • Heat shrinkable film applicable to automatic quick packaging on production line
  • Heat shrinkable film applicable to automatic quick packaging on production line

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

The invention relates to the field of heat shrinkable films, in particular to a heat shrinkable film applicable to automatic quick packaging on a production line. The heat shrinkable film comprises anouter surface layer, a heat seal layer on the inner surface and a barrier layer between the outer surface layer and the heat seal layer. The barrier layer comprises an EVOH (ethylene-vinyl alcohol) barrier interlayer, at least one side of the EVOH barrier interlayer is provided with a barrier layer protecting layer which is a PA (polyamide) layer, the surface layer is a PA layer, and the heat seal layer is a POP (polyether polyol) layer or one of an mLLDPE (metallocene linear low density polyethylene) layer, a ULDPE (ultralow-density polyethylene) layer and a Surlyn resin layer or a POP and mLLDPE mixed layer. The surface layer and the barrier layer as well as the barrier layer and the heat seal layer are connected through adhesive resin. The heat shrinkable film is high in strength, great in barrier and heat seal performance, excellent in machinability and suitable for full-automatic online packaging. By the heat shrinkable film, the shrinkable bag packaging modes and packaging efficiency can be changed.

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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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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