Composite PE (polyethylene) film for printing and preparation method of PE film

A polyethylene film and melt index technology, applied in the field of polyethylene film, can solve the problems of low surface free energy, reduced heat-sealing performance of polyethylene film, and poor aesthetics.

Active Publication Date: 2018-12-14
青岛东海包装产业有限公司
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In actual use, many plastic films used for packaging need to be printed. The commonly used printing process is surface printing. The process of forming on the surface of the surface, surface printing mostly uses polyolefin films such as polyethylene and polypropylene as substrates; however, because LDPE molecules only contain two elements, C and H, do not contain polar groups, and have high crystallinity , the surface free energy is low, resulting in poor affinity between LDPE and ink, poor printing effect during surface printing, and prone to deinking, and poor aesthetics after packaging; therefore, the printing surface must be treated with corona, but corona After treatment, the heat sealing performance of polyethylene film will be reduced

Method used

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  • Composite PE (polyethylene) film for printing and preparation method of PE film
  • Composite PE (polyethylene) film for printing and preparation method of PE film
  • Composite PE (polyethylene) film for printing and preparation method of PE film

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Experimental program
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Effect test

Embodiment 1

[0046] Embodiment 1: A kind of polyethylene film for printing composite is prepared by the following method:

[0047] (1) Ingredients: A: Inner layer raw materials include 40kg with a melt index of 1.9g / 10min and a density of 0.924g / cm 3 LDPE, 30kg melt index is 2.0g / 10min, density is 0.918g / cm 3 m-VLDPE, 30kg melt index is 1.0g / 10min, density is 0.918g / cm 3 m-LLDPE, 3kg of silica blocking agent with a particle size of 4-5μm and 1kg of PPA additive;

[0048] B: The middle layer raw material includes 40kg with a melt index of 1.9g / 10min and a density of 0.924g / cm 3 LDPE, 60kg melt index is 1.0g / 10min, density is 0.918g / cm 3 m-LLDPE and 1kgPPA additives;

[0049] C: Outer layer raw materials include 20kg with a melt index of 1.9g / 10min and a density of 0.924g / cm 3 LDPE, 40kg melt index is 2.0g / 10min, density is 0.918g / cm 3 m-VLDPE, 40kg melt index is 1.0g / 10min, density is 0.918g / cm 3 m-LLDPE and 1.4kgPPA additives;

[0050] Wherein, the interlayer thickness ratio of the...

Embodiment 2

[0056] Embodiment 2: A kind of polyethylene film for printing composite is prepared by the following method:

[0057] (1) Ingredients: A: Inner layer raw materials include 35kg with a melt index of 1.9g / 10min and a density of 0.924g / cm 3 LDPE, 35kg melt index is 2.0g / 10min, density is 0.918g / cm 3 m-VLDPE, 30kg melt index is 1.0g / 10min, density is 0.918g / cm 3 m-LLDPE, 2kg of silica blocking agent with a particle size of 4-5μm and 0.5kg of PPA additive;

[0058] B: The middle layer raw material includes 45kg with a melt index of 1.9g / 10min and a density of 0.924g / cm 3 LDPE, 55kg melt index is 1.0g / 10min, density is 0.918g / cm 3 m-LLDPE and 0.5kgPPA additives;

[0059] C: Outer layer raw materials include 15kg with a melt index of 1.9g / 10min and a density of 0.924g / cm 3 LDPE, 40kg melt index is 2.0g / 10min, density is 0.918g / cm 3 m-VLDPE, 45kg melt index is 1.0g / 10min, density is 0.918g / cm 3 m-LLDPE and 1kgPPA additives;

[0060] Wherein, the interlayer thickness ratio of t...

Embodiment 3

[0066] Embodiment 3: A kind of polyethylene film for printing composite is prepared by the following method:

[0067] (1) Ingredients: A: Inner layer raw materials include 45kg with a melt index of 1.9g / 10min and a density of 0.924g / cm 3 LDPE, 30kg melt index is 2.0g / 10min, density is 0.918g / cm 3 m-VLDPE, 25kg melt index is 1.0g / 10min, density is 0.918g / cm 3 m-LLDPE, 4kg of silica blocking agent with a particle size of 4-5μm and 1kg of PPA additive;

[0068] B: The middle layer raw material includes 50kg with a melt index of 1.9g / 10min and a density of 0.924g / cm 3 LDPE, 50kg melt index is 1.0g / 10min, density is 0.918g / cm 3 m-LLDPE and 1kgPPA additives;

[0069] C: Outer layer raw materials include 25kg with a melt index of 1.9g / 10min and a density of 0.924g / cm 3 LDPE, 35kg melt index is 2.0g / 10min, density is 0.918g / cm 3 m-VLDPE, 40kg melt index is 1.0g / 10min, density is 0.918g / cm 3 m-LLDPE and 2kgPPA additives;

[0070] Wherein, the interlayer thickness ratio of the i...

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Abstract

The invention discloses a composite PE (polyethylene) film for printing and a preparation method of the PE film and belongs to the technical field of PE films. The technical scheme is characterized inthat the composite PE film for printing comprises an inner layer, a middle layer and an outer layer, wherein the inner layer comprises LDPE (low density polyethylene), m-VLDPE (metallocene-very low density polyethylene), m-LLDPE (metallocene-linear low density polyethylene), an anti-block agent and a PPA (phenyl-propanolamine) aid in the weight ratio being (35-45):(25-35):(25-35):(2-4):(0.5-1); the middle layer comprises LDPE, m-LLDPE and the PPA aid in the weight ratio being (40-50):(50-60):(0.5-1.5); the outer layer comprises LDPE, m-VLDPE, m-LLDPE and the PPA aid in the weight ratio being(15-25):(35-45):(35-45):(1-2). High-transparency PE resin containing no slipping agent is selected, the adsorption capability of the PE film for ink can be improved, the deinking phenomenon is reduced, and the technical effect of improving the inner printing effect is realized.

Description

technical field [0001] The invention relates to the technical field of polyethylene film, more specifically, it relates to a polyethylene film for printing and compounding and a preparation method thereof. Background technique [0002] Polyethylene film, that is, PE film, refers to the film produced by PE, which can be divided into low-density polyethylene (LDPE), medium-density polyethylene (MDPE), high-density polyethylene (HDPE) and cross-linked polyethylene; low-density polyethylene Polyethylene film is a translucent, high-gloss film with good heat-sealing performance. It has excellent chemical stability, heat-sealing performance, water resistance and moisture resistance, freezing resistance, and can be boiled. It is often used in the interior of composite flexible packaging materials. Multi-layer film is also the most widely used and most used plastic packaging film at present, accounting for more than 40% of the consumption of plastic packaging film. [0003] For the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32B32B27/06B32B27/18B32B33/00B29C55/28
Inventor 吴伟张贵金吉东升
Owner 青岛东海包装产业有限公司
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