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Heat-sealing film for aluminum-plastic composite film and manufacturing method thereof

A technology of aluminum-plastic composite film and manufacturing method, which is applied in the field of aluminum-plastic composite film, can solve problems such as insufficient stability of molecular characteristics, stress whitening of heat-sealing layer, and large friction coefficient, and achieve stable thickness, excellent heat-sealing performance, and toughness Improved effect

Active Publication Date: 2019-08-02
ZHEJIANG DAOMING OPTOELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the molecular properties of the additives added in the heat-sealing layer existing in the prior art are not stable enough, migration occurs when the temperature is too high, and the coefficient of friction increases, and the heat-sealing layer is prone to stress whitening when the aluminum-plastic composite film is stamped and formed, thereby A new heat-sealing film for aluminum-plastic composite film and its manufacturing method are provided based on comprehensive consideration of temperature resistance, mechanical properties, electrolyte corrosion resistance, and heat-sealing performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A heat-sealing film for an aluminum-plastic composite film, which includes a composite layer, a core layer, and a heat-sealing layer from top to bottom. The composite layer is made of ternary random copolymer polypropylene A and an elastic resin that resists whitening. The mass ratio of the ternary random copolymer polypropylene A to the anti-whitening elastic resin is 60:10, and the melting point of the composite layer is 120° C.; the core layer is composed of homopolypropylene, and the melting point of the core layer is 140° C. °C; the heat-sealing layer is made of ternary random copolymer polypropylene B and binary random copolymer polypropylene, and the mass ratio of the ternary random copolymer polypropylene B to binary random copolymer polypropylene is 50 : 10, the molar ratio of ethylene content in the binary random copolymerized polypropylene is 4%, the fusing point of the heat-sealing layer is 110° C., and the layer thickness ratio of the composite layer, the co...

Embodiment 2

[0057] A heat-sealing film for an aluminum-plastic composite film, which includes a composite layer, a core layer, and a heat-sealing layer from top to bottom. The composite layer is made of ternary random copolymer polypropylene A and an elastic resin that resists whitening. The mass ratio of the ternary random copolymer polypropylene A to the anti-whitening elastic resin is 75:25, and the melting point of the composite layer is 170° C.; the core layer is composed of homopolypropylene, and the melting point of the core layer is 140° C. °C; the heat-sealing layer is made of ternary random copolymer polypropylene B and binary random copolymer polypropylene, and the mass ratio of the ternary random copolymer polypropylene B to binary random copolymer polypropylene is 50 : 10, the molar ratio of ethylene content in the binary random copolymerized polypropylene is 4%, the fusing point of the heat-sealing layer is 110° C., and the layer thickness ratio of the composite layer, the co...

Embodiment 3

[0072] A heat-sealing film for an aluminum-plastic composite film, which includes a composite layer, a core layer, and a heat-sealing layer from top to bottom. The composite layer is made of ternary random copolymer polypropylene A and an elastic resin that resists whitening. The mass ratio of the ternary random copolymer polypropylene A to the anti-whitening elastic resin is 90:40, and the melting point of the composite layer is 145° C.; the core layer is composed of homopolypropylene, and the melting point of the core layer is 170° C. °C; the heat-sealing layer is made of ternary random copolymer polypropylene B and binary random copolymer polypropylene, and the mass ratio of the ternary random copolymer polypropylene B to binary random copolymer polypropylene is 50 : 10, the molar ratio of ethylene content in the binary random copolymerized polypropylene is 4%, the fusing point of the heat-sealing layer is 110° C., and the layer thickness ratio of the composite layer, the co...

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Abstract

The invention discloses a thermal sealing film for an aluminum-plastic composite film and a preparation method of the thermal sealing film. The thermal sealing film comprises a composite layer, a core layer and a thermal sealing layer in sequence, wherein the composite layer is made of a ternary polypropylene random copolymer and an anti-albefaction elastic resin; the core layer is made of homo-polypropylene; and the thermal sealing layer is made of a ternary block copolymerization polypropylene random copolymer and a binary polypropylene random copolymer. The preparation method comprises the following steps: respectively putting the ternary polypropylene random copolymer, the anti-albefaction elastic resin, the homo-polypropylene, the ternary block copolymerization polypropylene random copolymer and the binary polypropylene random copolymer into three groups of screw rods, performing gradient heating, pushing to a distributor, distributing, performing extrusion so as to obtain a three-layer co-extrusion film, performing surface treatment on the composite layer, and performing trimming and coiling, thereby obtaining the thermal sealing film for the aluminum-plastic composite film. By adopting the thermal sealing film, the stress albefaction degree of the thermal sealing layer is effectively reduced when the aluminum-plastic composite film is molded in a stamping manner, the temperature resistance, the mechanical property, the electrolyte corrosion resistance and thermal sealing property of the thermal sealing film are improved, and the service life of the thermal sealing film is prolonged.

Description

technical field [0001] The invention relates to the field of aluminum-plastic composite films, in particular to a heat-sealing film for aluminum-plastic composite films and a manufacturing method thereof. Background technique [0002] In recent years, vigorously developing high value-added functional film packaging materials has become the development trend of the plastic packaging material industry in various countries in the world. Functional films usually have high technical content, but also have good economic benefits and strong market competitiveness, so they have attracted people's attention. As an emerging functional film, aluminum-plastic composite film has been widely used in the field of lithium-ion battery packaging because of its good packaging, temperature resistance, oxygen barrier, moisture resistance, puncture resistance, and corrosion resistance. [0003] Aluminum-plastic composite film is generally composed of outer protective film, outer adhesive, core l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/32B32B27/06B32B27/08B32B37/10C08L23/14C08L23/08C08L53/02C08L51/00C08L53/00C08L23/12C08L83/04C08K5/17
CPCB32B27/08B32B27/32B32B37/10C08L23/14C08L53/00C08L2205/02C08L2205/03C08L2205/035C08L23/0869C08L53/025C08L51/006C08L23/12C08L83/04C08K5/17
Inventor 蓝庆东曾正好段伟情吕斌金峰徐鸿
Owner ZHEJIANG DAOMING OPTOELECTRONICS TECH