A kind of optical grade self-adhesive polyethylene protective film and preparation method thereof

A polyethylene protective film, self-adhesive technology, applied in chemical instruments and methods, layered products, synthetic resin layered products, etc., can solve the problem that the protective film cannot achieve optical grade transparency, damage to electronic components, and peeling force of the protective film. problems such as lowering, to achieve the effects of excellent self-adhesion, easy processing and good mechanical properties

Active Publication Date: 2011-12-28
佛山新长盛塑料薄膜有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyisobutylene has good self-adhesiveness, but the peel force of the protective film tends to decrease with time
However, the polar groups of copolymers usin

Method used

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  • A kind of optical grade self-adhesive polyethylene protective film and preparation method thereof
  • A kind of optical grade self-adhesive polyethylene protective film and preparation method thereof
  • A kind of optical grade self-adhesive polyethylene protective film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Low-density polyethylene 2420H produced by Daqing Petrochemical is used as the back layer resin of the protective film; 30 parts of low-density polyethylene 2420H produced by Daqing Petrochemical is taken, and 70 parts of medium-density polyethylene 3505CH produced by Exxon Mobil is used as the middle layer of the protective film Layer resin; get 30 parts of low-density polyethylene 2420H produced by Daqing Petrochemical, and 70 parts of metallocene low-density polyethylene 1018HA produced by Exxon Mobil as the self-adhesive layer resin of the protective film.

[0023] The three-layer resin is co-extruded through three extruders. When extruding, a supercritical nitrogen fluid delivery system is used. The three machines are all heated in 5 stages. The temperature of the 5 stages from the head to the feed port is set to: 195 ℃, 180℃, 175℃, 160℃, 110℃. After extrusion, the film is blown to obtain a three-layer composite protective film. The process of extrusion blown film ...

Embodiment 2

[0026] Low-density polyethylene 2420H produced by Yangzi BASF is used as the back layer resin of the protective film; 30 parts of low-density polyethylene 2420H produced by Yangzi BASF and 70 parts of medium-density polyethylene 3505CH produced by ExxonMobil are used as the middle layer of the protective film Layer resin; get 30 parts of low-density polyethylene 2420H produced by Yangzi BASF, and 70 parts of metallocene low-density polyethylene 1018HA produced by Exxon Mobil as the self-adhesive layer resin of the protective film.

[0027] The three-layer resin is co-extruded through three extruders. When extruding, a supercritical nitrogen fluid delivery system is used. The three machines are all heated in 5 stages. The temperature of the 5 stages from the head to the feed port is set to: 195 ℃, 180℃, 175℃, 160℃, 110℃. After extrusion, the film is blown to obtain a three-layer composite protective film. The process of extrusion blown film is carried out in a dust-free and cle...

Embodiment 3

[0030] Low-density polyethylene 410E produced by Dow Chemical is used as the back layer resin of the protective film; 30 parts of low-density polyethylene 100BW produced by Exxon Mobil and 70 parts of medium-density polyethylene 6910AA produced by BP are used as the middle layer of the protective film. Layer resin; get 30 parts of low-density polyethylene 410E produced by Dow Chemical, and 70 parts of metallocene low-density polyethylene 1318CA produced by Exxon Mobil as the self-adhesive layer resin of the protective film.

[0031] The three-layer resin is co-extruded through three extruders. Supercritical nitrogen fluid delivery system technology is used for extrusion. The three machines are all heated in 5 stages, and the temperature of the 5 stages from the head to the feed port is set to: 190 ℃, 180℃, 170℃, 155℃, 100℃. After extrusion, the film is blown to obtain a three-layer composite protective film. The process of extrusion blown film is carried out in a dust-free and...

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Abstract

The invention belongs to a preparation method of a self-adhesive polyethylene protective film with optical-grade transparency. The protective film of the invention comprises three layers of a self-adhesive layer, an interlayer, and a back-material layer, and is a composite film obtained by coextrusion film blowing. Thereinto, the self-adhesive layer accounts for 10%-20% of the composite film in thickness; the interlayer accounts for 60%-80% of the composite film in thickness; and the back-material layer accounts for 10%-20% of the composite film in thickness. The self-adhesive layer is compounded by low density polyethylene and metallocene low density polyethylene with a ratio of 20/80-40/60 wt%; the interlayer is compounded by low density polyethylene and medium density polyethylene witha ratio of 20/80-40/60 wt%; and the back-material layer is composed of low density polyethylene. Three coextrusion film blowing units are all single screw machines with a length-diameter ratio of 28;the plastification extrusion process adopts a supercritical nitrogen fluid conveying system; and the extrusion film blowing process is performed in a dust-free and clean workshop. With the method of the invention, a self-adhesive polyethylene protective film with optical-grade transparency can be prepared.

Description

[0001] technical field [0002] The invention relates to a preparation method of an optical grade self-adhesive polyethylene protective film. technical background [0003] As the name suggests, a protective film is a thin film used to protect vulnerable surfaces. The function of the protective film is to prevent the surface of the protected substrate from damage or contamination during transportation, assembly, or processing. The protective film will remain on the surface of the protected substrate until the product is delivered to the user before being torn off and discarded. Therefore, under the basic performance requirements: proper and stable viscosity, easy to tear off, no residual glue and no shadow after the protective film is torn off, no air bubbles floating or warped edges after long-term lamination, outdoor use must have weather resistance. Many electrical appliances, high-end furniture, and decorative materials use this protective film. [0004] According to ...

Claims

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Application Information

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IPC IPC(8): B32B27/32B32B33/00B29C49/04
Inventor 戴涛
Owner 佛山新长盛塑料薄膜有限公司
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