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A kind of PET protective film and preparation method thereof

A protective film and film technology, applied in the field of PET protective film and its preparation, can solve the problems of harming the environment, easy to produce residual glue, poor peelability, etc., and achieve good compatibility, excellent transparency and gloss, and good adhesion performance. Effect

Active Publication Date: 2018-04-20
朱文鹏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of poor peelability, easy to produce residual glue, and environmental hazards in the existing PET protective film, the present invention provides a PET protective film and its preparation method, which is extruded and compounded by using a single-layer laminating extruder in a dust-free workshop Process production, at the same time, use thickness tester and other equipment to track and detect the thickness of the film on-line during the production process, so that the film has excellent characteristics such as uniform thickness, high cleanliness, no impurities, smooth appearance and low crystal point, and through the above implementation The PET protective film processed and formed by the scheme, the adhesion of the adhesive layer to the mirror steel plate at room temperature is 10-300gf / 25mm, and the increase in the adhesion force on the back of the laminated steel plate at 50°C for 1 hour is controlled between 2-5 times, and the process is protected The film is easy to tear without residual glue

Method used

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  • A kind of PET protective film and preparation method thereof
  • A kind of PET protective film and preparation method thereof
  • A kind of PET protective film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A PET protective film, comprising a PET base layer and an adhesive layer, the adhesive layer is made of metallocene polyethylene (MPE), wherein the mass fraction of metallocene polyethylene (MPE) is 100%, and the density is 0.89g / cm 3 , the melt index is 6.5g / 10min at 190°C and 2.16kg pressure, and the thickness of the adhesive layer is 8μm. Metallocene polyethylene (MPE) is purchased from Mitsui Chemicals Co., Ltd., Japan.

[0033] The PET base layer is a coated PET film with a longitudinal tensile strength of 227N / mm 2 , transverse tensile strength 235N / mm 2 ; Longitudinal elongation at break 95%, transverse elongation at break 97%; at 150°C / 15min, longitudinal heat shrinkage 1.2%, transverse heat shrinkage 0.2%; PET film density 1.35g / cm 3 , the thickness is 38μm, and the surface corona value is 40 dynes. From Yizheng Chemical Fiber Material Co., Ltd.

[0034] The preparation steps of above-mentioned protective film are:

[0035] After the above-mentioned component...

Embodiment 2

[0049] A PET protective film, comprising PET base layer and adhesive layer, adhesive layer adopts metallocene polyethylene (MPE) resin, POE elastomer, wherein, the mass fraction of metallocene polyethylene (MPE) resin is 95%, POE elasticity The mass fraction of body is 5%; the density of MPE is 0.90g / cm 3 The melt index at 190°C and 2.16kg pressure is 4.5g / 10min. The material is purchased from Mitsui Chemicals Co., Ltd., Japan. POE thermoplastic elastomer resin is a hydrogenated random copolymer of styrene polymer blocks and olefins , The material is purchased from Japan Asahi Kasei Co., Ltd., the molecular weight is 30000-80000, the molecular weight distribution index is between 1.5-2.5, and the density is 0.83g / cm 3 , under the conditions of 230°C and 2.16kg pressure, the melt index is 6.0g / 10min, and the thickness of the adhesive layer is 8μm.

[0050] The PET base layer is a coated PET film with a longitudinal tensile strength of 234N / mm 2 , transverse tensile strength 2...

Embodiment 3

[0057] A PET protective film, comprising a PET base layer and an adhesive layer, the adhesive layer is made of a metallocene polyethylene (MPE) resin and a POE elastomer, wherein the mass fraction of the metallocene polyethylene (MPE) resin is 70%, and the POE The mass fraction of elastomer is 30%, and the density of MPE is 0.90g / cm 3 , The melt index under the conditions of 190°C and 2.16kg pressure is 4.5g / 10min, the source of the material is Mitsui Chemicals Co., Ltd., Japan, POE thermoplastic elastomer resin is a hydrogenated random copolymer of styrene polymer block and olefin, the material Purchased from Japan Asahi Kasei Co., Ltd., the molecular weight is 30000-80000, the molecular weight distribution index is between 1.5 and 2.5, and the density is 0.88g / cm 3 , The melt index under the conditions of 230°C and 2.16kg pressure is 5.0g / 10min. The material is from Asahi Kasei Co., Ltd., Japan, and the thickness of the adhesive layer is 6 μm.

[0058] The PET base layer i...

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Abstract

The invention discloses a PET protective film and a preparation method thereof, belonging to the technical field of substrate surface protection. The PET protective film of the present invention comprises a PET base layer and an adhesive layer, and the adhesive layer is made of metallocene polyethylene and POE elastomer, wherein the mass fraction of metallocene polyethylene is 50-100%, and the mass fraction of POE elastomer is The mass fraction is 0-50%; the PET base layer is a PET film. The protective film of the present invention has high interlayer adhesion, strong shock resistance, good adhesion and peelability, low crystal point, high cleanliness, and small changes in adhesive strength with temperature and time. After long-term lamination, There is no air bubble floating or edge warping, and it can be recycled, and the preparation method is simple to operate and low in cost.

Description

technical field [0001] The invention belongs to the technical field of substrate surface protection, in particular relates to a protective film, more specifically relates to a PET protective film and a preparation method thereof. Background technique [0002] With the rapid development of IT and electronic industries and the development of many emerging high-tech application fields, the demand for PET protective films for electronic products is increasing. However, because the surface of electronic product components is very fragile and sensitive, there must be very strict requirements on the cleanliness, crystal point level, viscosity, and temperature resistance of the protective film covering it. In the production and use of many electronic products or touch screens, LCD screens, etc., in order to avoid possible damage during processing and handling, PET protective films must be used to provide comprehensive protection, and to avoid damage to the pasted objects by the prot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29D7/01C09J7/30C09J123/06C09J153/02
Inventor 朱文鹏
Owner 朱文鹏
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