Invention Grant
- Patent Title: Sizing agent for quartz glass fibers, quartz glass fiber, quartz glass yarn, and quartz glass cloth
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Application No.: US15177724Application Date: 2016-06-09
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Publication No.: US10104768B2Publication Date: 2018-10-16
- Inventor: Yuya Yokosawa
- Applicant: SHIN-ETSU QUARTZ PRODUCTS CO., LTD.
- Applicant Address: JP Tokyo
- Assignee: SHIN-ETSU QUARTZ PRODUCTS CO., LTD.
- Current Assignee: SHIN-ETSU QUARTZ PRODUCTS CO., LTD.
- Current Assignee Address: JP Tokyo
- Agency: Cheng Law Group, PLLC
- Priority: JP2015-120524 20150615
- Main IPC: C03C13/06
- IPC: C03C13/06 ; H05K1/03 ; C03C25/1095 ; C03C25/28 ; C03C25/321 ; C09D103/02 ; C09D103/04 ; C09D103/08

Abstract:
Provided are a sizing agent for quartz glass fibers capable of suppressing charging of quartz glass fibers, and suppressing generation of fluff in a production process for quartz glass fibers and a weaving process for a quartz glass cloth, a quartz glass fiber or a quartz glass yarn having applied thereonto the sizing agent, a quartz glass cloth, a prepreg for a printed circuit board, and a product using the quartz glass fiber. The sizing agent for quartz glass fibers includes an aqueous solution containing: a cationic vinyl acetate copolymer emulsion in which a cationic vinyl acetate copolymer having a weight average molecular weight of from 5,000 to 500,000 is dispersed in water; and starch, in which emulsion particles of the cationic vinyl acetate copolymer emulsion have a 50% diameter on a volume basis of from 0.1 μm to 5 μm.
Public/Granted literature
- US20160362330A1 SIZING AGENT FOR QUARTZ GLASS FIBERS, QUARTZ GLASS FIBER, QUARTZ GLASS YARN, AND QUARTZ GLASS CLOTH Public/Granted day:2016-12-15
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