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White covering film and manufacturing method thereof

A production method and technology of covering film, which are applied in chemical instruments and methods, film/sheet adhesives, epoxy resin adhesives, etc., can solve the problems of high cost, low peel strength, etc., and achieve good yellowing resistance. , Simple and fast production, excellent anti-yellowing effect

Active Publication Date: 2011-06-01
GUANGDONG SHENGYI SCI TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN200910188903 mentions that white coating and adhesive composition are applied on both sides of colored PI film respectively, so as to make white covering film, which has good flexibility and high hiding power, but because PI film is used as insulating base film, the cost is higher; CN200910188904 Only coat one layer of white coating on the surface of the release film to obtain a white film with good flexibility and good weather resistance, but the peel strength is low when pressing the substrate

Method used

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  • White covering film and manufacturing method thereof
  • White covering film and manufacturing method thereof
  • White covering film and manufacturing method thereof

Examples

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Embodiment 1

[0053] Flexible linear saturated polyester (commodity model Vitel3300B, manufactured by Bostik Company) 68 parts by weight; Rigid linear saturated polyester (commodity model Vitel2200B, manufactured by Bostik Company) 32 parts by weight; Blocked isocyanate curing agent (commodity model 1530, manufactured by Bayer Manufacturing) 10 parts by weight; 115 parts by weight of rutile titanium dioxide (commercial model TRONOX CR828, product of Kemeiji Co., Ltd., Australia); 0.08 part by weight of fluorescent whitening agent (commodity model OB-1, product of U.S. Eastman Company); defoamer (Product model BYK-57, product of BYK Company) 0.4 parts by weight. A butanone solvent was used to adjust the solid content of the glue solution to 48%, and mixed to form a white coating composition.

[0054] The composition is coated on the release surface of the PET release base film with a thickness of 25 μm by a glue coating machine, and the thickness of the coating is 25 μm, and then baked in an...

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Abstract

The invention relates to a white covering film and a manufacturing method thereof. The white covering film comprises a release basement membrane, a white coating coated on the release basement membrane and an adhesive layer coated on the white coating. The white coating is a composition using flexible saturated polyester as a matrix and comprises the following components in part by weight: 50 to 70 parts of flexible saturated polyester, 30 to 50 parts of hard saturated polyester, 1 to 20 parts of blocked isocyanate curing agent, 15 to 150 parts of pigment, 15 to 120 parts of inorganic filler, 0.01 to 0.30 parts of fluorescent brightening agent, 0.5 to 2.5 parts of antifoaming agent and a right amount of solvent. The white covering film can be used for a flexible printed circuit and has high yellowing resistance, high covering power, excellent folding resistance and high glossiness. When the white covering film is compressed with a substrate, the excellent adhesion between the white covering film and the substrate is guaranteed.

Description

technical field [0001] The invention relates to the field of flexible printed circuits, in particular to a white covering film for flexible printed circuits and a manufacturing method thereof. Background technique [0002] The progress of the information and communication industry has led to the rapid development of the microelectronics industry. Flexible printed circuits (FPC) have emerged and developed rapidly, and have been widely used in many fields such as mobile phones, notebook computers, and liquid crystal displays. At present, due to the three major characteristics of LED products, such as energy saving, environmental protection, and long life, their application fields continue to expand, and the types and quantities of applied products continue to increase. All parties are investing in the LED industry. In the financial tsunami, it rose against the market and showed strong vitality. [0003] The biggest difference between a flexible printed circuit board (FPCB) an...

Claims

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Application Information

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IPC IPC(8): C09J7/02C09D175/06C09D7/12C09J163/00C09J133/04B32B27/18B32B27/36H05K1/02
Inventor 鹿海华茹敬宏伍宏奎
Owner GUANGDONG SHENGYI SCI TECH
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