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Hot melt adhesive film and its preparation method, application, organosilicon polymer

A hot-melt adhesive film and polymer technology, applied in applications, adhesive products, other household appliances, etc., can solve problems such as decreased bonding force, delamination of packaging materials, and increased risk of delamination, to improve stability, The effect of enhancing the bonding force

Active Publication Date: 2021-03-16
CHANGZHOU BAIJIA NIANDAI FILM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the long-term aging process of this co-extruded film, the risk of delamination of the two materials will increase, which will eventually lead to a decrease in the bonding force between the interfaces of the EVA-POE layer, resulting in delamination between the inner layers of the packaging material, shortening the Lifespan of solar panels and touchscreens

Method used

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  • Hot melt adhesive film and its preparation method, application, organosilicon polymer
  • Hot melt adhesive film and its preparation method, application, organosilicon polymer
  • Hot melt adhesive film and its preparation method, application, organosilicon polymer

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preparation example Construction

[0046] further, see figure 1 , the present invention also provides a method for preparing a hot-melt adhesive film, comprising: using polyolefin elastomer as the inner layer, ethylene-vinyl acetate copolymer as the outer layer on both surfaces of the inner layer, and making three layers by co-extrusion Co-extruded composite film; UV radiation, the addition reaction of siloxane containing special polar structure in the polyolefin elastomer produces organic silicon polymer, that is, the middle layer. Specifically, the hot melt adhesive film comprises a five-layer structure: an inner polyolefin elastomer; two outer layers of ethylene-vinyl acetate copolymer; two middle layers of silicone polymer between the inner layer and the outer layer .

[0047] As an optional implementation of co-extrusion.

[0048] The co-extrusion method includes: mixing and melting the components of the polyolefin elastomer to form an inner layer melt; mixing and melting the components of the ethylene-v...

Embodiment 1

[0056] (1) The polyolefin elastomer in the inner layer adopts 95kg of polyolefin elastomer masterbatch, 1.2kg of siloxane with special polar structure, 0.5kg of antioxidant, 1.6kg of thermal initiator, and 1.5kg of crosslinking monomer, 0.2kg of light stabilizer is prepared; the ethylene-vinyl acetate copolymer of the outer layer adopts 96.2kg of ethylene-vinyl acetate copolymer masterbatch, 0.6kg of antioxidant, 0.8kg of thermal initiator, 1.6kg of crosslinking monomer, silane Prepare 0.4kg of coupling agent and 0.2kg of light stabilizer.

[0057] (2) Add one part of polyolefin elastomer raw material and two parts of ethylene-vinyl acetate copolymer raw material into corresponding feeding cylinders respectively, and after extrusion at 100°C, an inner layer melt and two outer layer melts are obtained; then The three-layer co-extruded composite film is obtained by distributing through a distributor and co-extruding a die head, and after UV irradiation, a five-layer composite ho...

Embodiment 2

[0059] (1) The polyolefin elastomer in the inner layer adopts 94.8kg of polyolefin elastomer masterbatch, 1.6kg of siloxane containing special polar structure, 0.5kg of antioxidant, 1.5kg of thermal initiator, and 1.4kg of crosslinking monomer , light stabilizer 0.2kg, prepared; the ethylene-vinyl acetate copolymer of the outer layer adopts ethylene-vinyl acetate copolymer masterbatch 97.1kg, antioxidant 0.5kg, thermal initiator 0.6kg, crosslinking monomer 1.2kg, Silane coupling agent 0.4kg, light stabilizer 0.2kg, prepare.

[0060] (2) Add one part of polyolefin elastomer raw material and two parts of ethylene-vinyl acetate copolymer raw material into corresponding feeding cylinders respectively, and after extrusion at 100°C, an inner layer melt and two outer layer melts are obtained; then The three-layer co-extruded composite film is obtained by distributing through a distributor and co-extruding a die head, and after UV irradiation, a five-layer composite hot-melt adhesive ...

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Abstract

The invention belongs to the technical field of adhesive films, and in particular relates to a hot-melt adhesive film, a preparation method, an application thereof, and an organosilicon polymer. The hot melt adhesive film includes: inner layer, polyolefin elastomer; outer layer, ethylene-vinyl acetate copolymer on both surfaces of the inner layer; and middle layer, silicone polymer. The organic silicon polymer is used as the middle layer to play the role of connection and transition, which improves the bonding force between the EVA and POE layers and improves the stability of the hot melt adhesive film during long-term use. It can be applied to solar panels and The field of packaging materials for touch screens.

Description

technical field [0001] The invention belongs to the technical field of adhesive films, and in particular relates to a hot-melt adhesive film, a preparation method, an application thereof, and an organosilicon polymer. Background technique [0002] At present, the existing EVA / POE / EVA hot-melt adhesive film is gradually replacing ethylene-vinyl acetate copolymer film (EVA) as the main packaging material due to its excellent water vapor barrier and anti-PID characteristics. However, since polyolefin elastomers are non-polar resins and ethylene-vinyl acetate copolymers are polar resins, the crosslinking reactivity, melt viscosity and shear melt heating rate of the two resins are significantly different, so The film will delaminate after co-extrusion. During the long-term aging process of this co-extruded film, the risk of delamination of the two materials will increase, which will eventually lead to a decrease in the bonding force between the interfaces of the EVA-POE layer, r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/10C09J7/30C09J123/08C09J183/04H01L31/048
CPCC09J7/10C09J7/30C09J123/0815C09J123/0853C09J183/04H01L31/0481C09J2423/04C09J2483/00Y02E10/50B32B27/32B32B27/08B32B27/283B32B27/306B32B27/18B32B27/26B32B2405/00B32B2307/30C09J7/50C09J2301/208C09J2483/003C09J2301/304C09J2203/318C09J2203/322C09J2431/00C09J7/35C09J7/241B29C48/022C09J2301/416C09J2301/12C09J2301/162C09J2301/414B29L2031/712C08G77/20C08L23/0853C08L83/04C08L2203/30C08L2310/00
Inventor 熊唯诚边祥成范国威朱宙峰周乐茹正伟罗刚
Owner CHANGZHOU BAIJIA NIANDAI FILM TECH CO LTD