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Self-supporting bag and composite film thereof

A composite film, stand-up pouch technology, applied in the direction of synthetic resin layered products, lamination, layered products, etc., can solve the problem of "PE melting out, achieve good stiffness, excellent heat sealing performance, and improve product quality." Effect

Active Publication Date: 2015-09-23
河北永新包装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a polyethylene film, which has good heat-sealing performance, solves the problem of "PE melt-out" at the existing heat-sealing part, thereby improving the resistance of the stand-up pouch made from it. Pressure performance and drop resistance

Method used

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  • Self-supporting bag and composite film thereof
  • Self-supporting bag and composite film thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1, preparing PE film.

[0030] Add composite layer resin raw materials, intermediate layer resin raw materials and heat-sealing layer resin raw materials to the three barrels of the co-extrusion machine respectively. The formula of each resin raw material is as follows:

[0031] Composite layer: 70wt% m-LLDPE and 30wt% LDPE.

[0032] Middle layer: 35wt% HDPE, 30wt% LLDPE, 34.7wt% LDPE and 0.3wt% fluoride additive.

[0033] Heat-sealing layer: 33wt% of LDPE, 65wt% of reinforced polyethylene resin, 0.7wt% of slippery agent and 1.3wt% of opening agent.

[0034] The polymer particles in the above three barrels are melted by the extruder to form a tube blank. After the tube blank is stretched, compressed air is blown out from the center of the extruder die to blow the tube blank into a bubble-like film. The shaped film is cooled and shaped by the air ring cooling air to obtain a PE film.

Embodiment 2

[0035] Example 2, preparing PE film.

[0036] The formula of each resin raw material is as follows: Composite layer: 60wt% m-LLDPE and 40wt% LDPE.

[0037] Middle layer: 30wt% HDPE, 34.8wt% LLDPE, 35wt% LDPE and 0.2wt% fluoride additive.

[0038] Heat-sealing layer: 34.2wt% of LDPE, 63wt% of reinforced polyethylene resin, 0.8wt% of slippery agent and 2.0wt% of opening agent. All the other are with embodiment 1.

Embodiment 3

[0039] Example 3, preparing PE film.

[0040] The formula of each resin raw material is as follows: Composite layer: 66.7wt% m-LLDPE and 33.3wt% LDPE.

[0041] Middle layer: 33.24wt% HDPE, 33.24wt% LLDPE, 33.24wt% LDPE and 0.28wt% fluoride additive.

[0042] Heat-sealing layer: 32.43wt% LDPE, 64.85wt% reinforced polyethylene resin, 0.78wt% slip agent and 1.94wt% anti-opening agent. All the other are with embodiment 1.

[0043] The PE films prepared in Examples 1-3 were tested for their heat-sealing properties and mechanical properties, and the test results are shown in Table 1.

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Abstract

The invention discloses a polyethylene film. The polyethylene film comprises a composite layer, a middle layer and a heat sealing layer which are sequentially overlapped. The composite layer comprises 60-70wt% of metallocene polyethylene and 30-40wt% of low-density polyethylene; the middle layer comprises 30-35wt% of high-density polyethylene, 30-35wt% of linear low-density polyethylene and 30-35wt% of low-density polyethylene; the heat sealing layer comprises 33-35% of low-density polyethylene, 63-65% of reinforcing polyethylene resin, 0.5-0.8wt% of slipping agent and 1.3-2.0wt% of anti-blocking agent. A melting point of the composite layer is higher than that of the middle layer, and the melting point of the middle layer is higher than that of the heat sealing layer. The invention further provides a composite film and a self-supporting bag which are prepared through the polyethylene film. By the adoption of the PE film, PE melting of the heat sealing portion can be effectively avoided, the heat sealing performance of the PE film is greatly improved, and the polyethylene film has excellent adaptation, pressure resistance and falling resistance and meets the requirement of actual production.

Description

technical field [0001] The invention relates to the field of packaging of edible products, in particular to a polyethylene film, a composite film of a stand-up pouch with a welding spout and a stand-up pouch with a welding spout product. Background technique [0002] In recent years, the fast-moving consumer food industry is gradually rising, and its demand is increasing day by day. More and more consumers have higher and higher requirements for the functional packaging of fast-moving consumer goods. As one of many fast-moving packaging bags, the stand-up pouch has always been loved by consumers due to its unique bag shape. At the same time, many flexible packaging manufacturers will complain about the complexity of the stand-up pouch product process. [0003] Compared with other packaging products, the stand-up pouch is composed of two parts: the spout and the bag body. Its production mainly includes four processes: printing, compounding, bag making, and spout ironing. Esp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/06B32B27/32B32B27/18B32B27/36B32B27/08B32B27/16B32B37/12B32B33/00
CPCB32B27/06B32B27/08B32B27/16B32B27/18B32B27/32B32B27/327B32B27/36B32B33/00B32B37/1284B32B2307/31
Inventor 胡继超汪学文谢文汇姚荣
Owner 河北永新包装有限公司
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