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Production technology of high-toughness high-impact strength heat-shrinkage film packaging bag

A technology of heat shrinkable film and production process, which is applied in the field of plastic products, can solve problems such as insufficient strength, graying, and surface blooming, and achieve the effects of improving heat sealing performance, broadening application fields, and good tear strength

Inactive Publication Date: 2016-11-02
SHAANXI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This product adopts the special technology of advanced bidirectional stretching and three-layer melt co-extrusion, which can produce a soft shrink film with high transparency, high shrinkage rate, high toughness, high heat sealing performance, antistatic, cold resistance, safe and reliable, However, the ordinary POF heat-shrinkable film of the prior art still has the following defects: insufficient strength, unable to meet higher requirements for applications; low transparency of the film, blooming or whitening of the surface, and poor printing effect; general heat-sealing performance, low heat-sealing strength Not high enough to affect the appearance of the product and the quality of the packaged product

Method used

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  • Production technology of high-toughness high-impact strength heat-shrinkage film packaging bag
  • Production technology of high-toughness high-impact strength heat-shrinkage film packaging bag

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Experimental program
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Effect test

Embodiment 1

[0021] Such as figure 1 As shown, the production process of a high-toughness and high-impact-strength heat-shrinkable film packaging bag of this embodiment is characterized in that it comprises the following process steps:

[0022] 1) Raw material preparation: The raw materials for the heat shrinkable film include the following components (parts by weight): 85 parts of LDPE low-density polyethylene, 65 parts of LLDPE linear low-density polyethylene, 3 parts of magnesium stearate, 3 parts of pentaerythritol, ethylene - 55 parts of octene copolymer, 2 parts of calcium stearate, 3 parts of sorbitol, 2 parts of barium stearate, 2 parts of polyglycerol monostearate, 2 parts of glycerol, wherein the LDPE low density poly Ethylene has a melt index of 0.3g / 10min and a density of 0.93 g / cm 3 low-density polyethylene, wherein the LLDPE linear low-density polyethylene has a melt index of 0.45g / 10min and a density of 0.91 g / cm 3 linear low density polyethylene;

[0023] (2) Mixing trea...

Embodiment 2

[0028] Embodiment 2: The rest are the same as in Embodiment 1, except that in the step (1), the raw materials for the production of the heat shrinkable film include the following components (parts by weight): 80 parts of LDPE low-density polyethylene, LLDPE linear 60 parts of low-density polyethylene, 2 parts of magnesium stearate, 2 parts of pentaerythritol, 50 parts of ethylene-octene copolymer, 1 part of calcium stearate, 2 parts of sorbitol, 1 part of barium stearate, polyglycerol monohard 1 part of fatty acid ester, 1 part of glycerol; the LDPE low-density polyethylene described in the step (1) has a melt index of 0.35g / 10min; the LLDPE linear low-density polyethylene described in the step (1) The melt index is 0.5g / 10min and the density is 0.92g / cm 3 linear low-density polyethylene; the extrusion temperature of the film blowing machine in the step (4) is 210°C; the material is air-cooled to 45°C in the step (5), and the transverse stretch ratio is 6, and the longitudina...

Embodiment 3

[0029] Embodiment 3: The rest are the same as in Embodiment 1, except that in the step (1), the raw materials for the production of the heat shrinkable film include the following components (parts by weight): 82 parts of LDPE low-density polyethylene, LLDPE linear 63 parts of low-density polyethylene, 2 parts of magnesium stearate, 3 parts of pentaerythritol, 50-55 parts of ethylene-octene copolymer, 2 parts of calcium stearate, 2 parts of sorbitol, 1 part of barium stearate, polyglycerin 2 parts of monostearate, 1 part of glycerol; the LDPE low-density polyethylene described in the step (1) has a melt index of 0.4g / 10min; the LLDPE linear low-density polyethylene described in the step (1) Polyethylene has a melt index of 0.55g / 10min and a density of 0.93g / cm 3 linear low-density polyethylene; the extrusion temperature of the film blowing machine in the step (4) is 220°C; the material is air-cooled to 50°C in the step (5), and the transverse stretch ratio is 7, and the longit...

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Abstract

The invention discloses a production technology of a high-toughness high-impact strength heat-shrinkage film packaging bag and relates to the field of plastic products. The production technology comprises raw material preparation, material blending, high temperature mixing, extrusion film blowing treatment, cooling cutting treatment, and examination and package punching of a finished product. Through selected raw materials and appropriate processes, film strength is improved, an application range is widened, film heat-sealing performances are improved, mechanized production is feasible and package rebound elasticity is improved. The product has invariant vertical and horizontal shrinkage rates, guarantees package stability, has good physical and mechanical performances such as good tearing strength, fracture tensile strength, fracture percentage elongation and impact strength and is worthy of promotion.

Description

technical field [0001] The invention relates to the field of plastic products, in particular to a production process of a heat-shrinkable film packaging bag with high toughness and high impact strength. Background technique [0002] POF shrink film is the abbreviation of biaxially oriented polyolefin shrink film. It is a new type of environmentally friendly shrink film that is most widely used in the world and is developing rapidly. This product adopts the special technology of advanced bidirectional stretching and three-layer melt co-extrusion, which can produce a soft shrink film with high transparency, high shrinkage rate, high toughness, high heat sealing performance, antistatic, cold resistance, safe and reliable, However, the ordinary POF heat-shrinkable film of the prior art still has the following defects: insufficient strength, unable to meet higher requirements for applications; low transparency of the film, blooming or whitening of the surface, and poor printing e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08K13/02C08K5/098C08K5/053B29C69/00B29C47/92B29L7/00B29C48/92
CPCC08L23/06B29C48/0018B29C48/92B29C69/001B29C2948/92704B29L2007/00C08J5/18C08J2323/06C08J2423/08C08K2201/014C08L2203/162C08L2205/025C08L2205/035C08L2207/066C08L23/0815C08K13/02C08K5/098C08K5/053
Inventor 许磊
Owner SHAANXI UNIV OF TECH
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