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Title:
GLASS CLOTH, PREPREG, AND PRINTED WIRING BOARD
Document Type and Number:
WIPO Patent Application WO/2022/038944
Kind Code:
A1
Abstract:
Provided is a glass cloth obtained by weaving a glass thread, which is made from a plurality of glass filaments, as a warp and weft. The average filament diameter of the glass filaments is 3.0-4.5 μm. The respective weaving densities of the warp and the weft constituting the glass cloth are, independently, 70-130 threads / 25 mm. The standard deviation of weft width of the glass cloth is not more than 30 μm. The weft covering ratio R, which is represented by the expression R=Y/(25400/D) (where R is the weft covering ratio, Y is the average weft width, and D is the weft weaving density) satisfies the relational expression 0.50≤R≤0.83.

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Inventors:
HONMA HIROYUKI (JP)
HIROSE AMANE (JP)
Application Number:
PCT/JP2021/026865
Publication Date:
February 24, 2022
Filing Date:
July 16, 2021
Export Citation:
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Assignee:
ASAHI CHEMICAL IND (JP)
International Classes:
D03D15/267; B29B11/16; D03D1/00; H05K1/03; H05K1/11; B29K105/10
Domestic Patent References:
WO2021090756A12021-05-14
Foreign References:
JP2020105683A2020-07-09
JP2019104996A2019-06-27
JP2019031750A2019-02-28
JP2006052473A2006-02-23
JP2005042245A2005-02-17
JP2006063489A2006-03-09
JP2018021274A2018-02-08
JP2011241515A2011-12-01
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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