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An anti-blocking, antistatic heat-sealing coating and cover tape

A heat-sealing coating and anti-static technology, applied in coatings, conductive coatings, etc., can solve the problems of uneven dispersion of heat-sealing coating liquid, adhesion of cover tape and electronic components, and hazards of electronic components storage and transportation. Enhance anti-blocking effect, good anti-static effect, maintain anti-static effect for a long time

Active Publication Date: 2022-02-22
ZHEJIANG JIEMEI ELECTRONICS & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cover tape is stored in the form of winding before use. After winding, the front and back of the cover tape overlap. After being attached to the carrier tape, it is stored as a reel. During storage in the reel state, the cover tape is in contact with the electronic components and the carrier tape, and the cover tape and the electronic components may sometimes stick together, which affects the use of the electronic components.
At the same time, the existence of static electricity on the cover tape will also bring certain hazards to the storage and transportation of electronic components. Therefore, the development of a non-adhesive and anti-static cover tape is urgently needed by the market.
[0003] Since the heat-sealing layer resin of the cover tape is sticky, it is generally necessary to add an auxiliary anti-blocking agent to prevent the problems caused by the sticking of the cover tape product. Usually, the added anti-blocking agent is some inorganic fillers, such as carnauba wax and polyolefin wax , spherical or crushed talc particles, silica particles, bauxite particles, mica particles, calcium carbonate, magnesium carbonate, etc., these materials may be unevenly dispersed in the heat-sealing coating liquid, and problems such as agglomeration occur, and then Affects the peel performance of the cover tape
At the same time, the cover tape must also provide some protection against static electricity. Static electricity will cause breakdown and other damage to precision electronic components, and the winding and unwinding of the cover tape will aggravate such problems. In order to avoid damage to electronic components caused by static electricity, In the prior art, ionic antistatic agents are usually added to the cover tape coating. The hydrophilic groups in the molecules of such antistatic agents are all arranged toward the air side, which is easy to absorb environmental moisture, or interact with moisture in the air through hydrogen bonds. Combined, a monomolecular conductive layer is formed, so that the generated static charge can leak quickly to achieve the purpose of antistatic, but this kind of antistatic agent is greatly affected by air humidity, and the antistatic effect is short-lived

Method used

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  • An anti-blocking, antistatic heat-sealing coating and cover tape

Examples

Experimental program
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Effect test

Embodiment 1

[0028] An anti-blocking, antistatic heat-sealing coating is formed by coating a coating liquid, and the coating liquid includes the following components: cellulose acetate butyrate 1wt%, acrylic resin 10.2wt%, ethyl acetate 86wt%, Titanium dioxide conductive particles 2wt%, phosphate ester dispersant 0.8wt%; Among them, the titanium dioxide conductive particles adopt the FT300W product of Ishihara Industry, which is needle-shaped titanium dioxide conductive particles with a diameter of 0.2-0.3μm and a length of 5-6μm; The quasi-dispersant uses BYK-110 product.

Embodiment 2

[0030] An anti-blocking, antistatic heat-sealing coating is formed by coating a coating liquid, and the raw materials of the coating liquid are the same as those in Example 1, with differences in content, and specifically include the following components: cellulose acetate butyrate 2wt%, Acrylic resin 9.6wt%, ethyl acetate 86wt%, titanium dioxide conductive particles 2wt%, phosphate ester dispersant 0.4wt%.

Embodiment 3

[0032] An anti-blocking, antistatic heat-sealing coating is formed by coating a coating liquid, and the raw materials of the coating liquid are the same as those in Example 1, with differences in content, and specifically include the following components: cellulose acetate butyrate 2wt%, Acrylic resin 9.4wt%, ethyl acetate 86wt%, titanium dioxide conductive particles 2wt%, phosphate ester dispersant 0.6wt%.

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Abstract

The invention belongs to the technical field of cover tape film, and specifically discloses an anti-blocking and antistatic heat-sealing coating and a cover tape; Cloth is formed, and described coating liquid comprises following composition: cellulose acetate butyrate 1-3wt%, heat-sealing resin 9-18wt%, solvent 76-86wt%, titanium dioxide conductive particle 2-3wt%, dispersant 0.4-0.8 wt%; the cover tape includes a substrate layer and the anti-blocking and antistatic heat-seal coating formed on the substrate layer. The invention can effectively solve the problems of high adhesion and unsatisfactory antistatic effect of the heat-sealing layer resin of the existing cover tape, and the prepared cover tape will not cause self-adhesion and reverse winding; the pulling force is large and it is not easily damaged; the antistatic effect lasting.

Description

technical field [0001] The invention belongs to the technical field of cover tape films, and in particular relates to an anti-adhesion and antistatic heat-sealing coating and a cover tape. Background technique [0002] In recent years, with the rapid development of surface mounting of electronic components, surface mounting technology has also made great progress. In order to better preserve and transport small electronic chip components, carrier tape is usually used for packaging, and electronic components are stored in each part of the carrier tape. Pocket, then seal with cover tape. The cover tape is stored in the form of winding before use. After winding, the front and back of the cover tape overlap. After being attached to the carrier tape, it is stored in a coiled state. During storage in the coiled state, the cover tape is in contact with the electronic components and the carrier tape, and the cover tape and the electronic components sometimes stick together, which a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/04C09D5/24C09D7/63C09D7/65C08J7/044C08J7/052C08L67/02C08L23/06
CPCC09D133/04C09D5/24C09D7/63C09D7/65C08J7/052C08J7/044C08J7/0427C08K2003/2241C08K2201/001C08L2201/04C08L2203/16C08J2367/02C08J2323/06C08J2433/04
Inventor 吴琦琦秦怀礼王鹏姚小琴何教滢
Owner ZHEJIANG JIEMEI ELECTRONICS & TECH
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