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Hot bending protective film as well as preparation method and application thereof

A technology of protective film and hot bending, which is applied in the field of hot bending protective film and its preparation, can solve the problems of failure to achieve the visual effect of the appearance, the decline of the protective effect, and the failure to achieve the adhesion of the board, so as to improve the yield of the appearance surface, The effect of reducing spot defects and good protection effect

Active Publication Date: 2019-12-31
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing hot-bending protective film has poor flexibility and cannot achieve a good fit with the sheet, which reduces its protective effect. During the hot-bending forming process, the sheet is prone to appearance pitting or blooming. Cannot meet the qualified appearance and visual effect

Method used

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  • Hot bending protective film as well as preparation method and application thereof
  • Hot bending protective film as well as preparation method and application thereof
  • Hot bending protective film as well as preparation method and application thereof

Examples

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preparation example Construction

[0031] For the preparation method of the above-mentioned hot bending protective film 100 in one embodiment, refer to figure 2 , the method includes the following steps:

[0032] S101: mixing polyolefin, plasticizer and heat stabilizer to obtain a premix.

[0033] Wherein, the proportioning of polyolefin, plasticizer and thermal stabilizer is as mentioned above. In order to improve the uniformity of mixing the materials, the step of mixing the polyolefin, the plasticizer and the heat stabilizer is carried out under stirring conditions. Further, the stirring conditions may include: the rotation speed is 500r / min-1500r / min, and the time is 20min-40min.

[0034] S102: Molding the premix to obtain the polymer base layer 120 .

[0035] Wherein, the method for molding the premix may be a conventional molding method in the field, such as extrusion molding. Conditions for molding the premixed material may include: a temperature of 120° C. to 110° C. and a time of 20 minutes to 120...

Embodiment 1

[0054] The structure of the heat bending protective film of the present embodiment is as follows: figure 1 shown.

[0055] Mix polyvinyl chloride, epoxidized soybean oil, and barium-zinc stabilizer in a weight ratio of 100:50:2, and stir at 800 r / min for 30 minutes to obtain a premix. The premix was placed in a twin-roll calender (manufactured by Chuanghong Instrument Equipment Co., Ltd., model CH-0201) and plasticized and extruded at 145 ° C for 30 minutes to obtain a polymer base layer with a thickness of 0.1 mm; Acrylate is evenly printed on one side of the polymer base layer by screen printing to form a bonding layer with a thickness of 10 μm, and then the fluorine-containing polyester varnish is evenly coated on the other side of the polymer base layer by screen printing , forming a release layer whose thickness is controlled to be 8 μm; place the compounded polymer base layer with an adhesive layer and a release layer in a curing chamber, and cure it at 60° C. for 36 ho...

Embodiment 2

[0057] The preparation process of the hot bending protective film of this embodiment is similar to that of Example 1, the difference is that the raw materials for preparing the polymer base layer are polyvinyl chloride, epoxy fatty acid methyl ester and barium zinc stabilizer, and the weight ratio is 100:25:6 .

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Abstract

The invention relates to a hot bending protective film as well as a preparation method and an application thereof. The hot bending protective film comprises a polymer base layer; raw materials for preparing the polymer base layer comprise polyolefin, a plasticizer and a heat stabilizer; the weight ratio of the polyolefin to the plasticizer to the heat stabilizer is 100:(20-80):(1-10). The hot bending protective film has high flexibility and can be well attached to a to-be-hot-bent plate, so that a sufficient buffering effect is achieved in the hot bending process, the plate is protected, meanwhile, reduction of point defects caused by the fact that dust or other particles contaminate the plate in the production environment can be facilitated, and the yield of the appearance surface of theplate is increased.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a hot bending protective film and its preparation method and application. Background technique [0002] With the rapid development of mobile communication technology, mobile terminals (such as mobile phones, tablet computers, etc.) have become an indispensable communication tool in people's life and work, and mobile terminals have been greatly developed in appearance and function. Existing mobile terminal shells generally need to be made through multiple special processing procedures, including high-pressure hot-bending forming process, through which 2D plates can be formed into 3D plates with curved surface effects. In order to avoid damage to the sheet during hot bending, the sheet is usually covered with a protective film before hot bending. However, the existing hot-bending protective film has poor flexibility and cannot achieve a good fit with the sheet, which reduces its p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/24
CPCC08K5/098C08L91/00C09J2423/106C09J2427/006C09J2433/00C09J7/243C09J7/245C09J2301/41
Inventor 郭学方
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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