Glass yarn, glass cloth, and method for manufacturing glass yarn
By employing an indirect method with controlled temperature differences, the glass filaments are produced with reduced hollow fibers and flyers, achieving a fine fiber diameter and low dielectric constant, improving the mechanical strength and reliability of glass cloth for printed circuit boards.
JP7876804B2Active Publication Date: 2026-06-22UNITIKA LTD +1
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- UNITIKA LTD
- Filing Date
- 2026-03-04
- Publication Date
- 2026-06-22
Smart Images
Figure 0007876804000002 
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Figure 0007876804000004
Abstract
The present invention provides a glass yarn in which multiple glass filaments are bundled together, wherein the glass material constituting the glass filaments contains 40-60% by mass of SiO2 and 15-35% by mass of B2O3, and the average fiber diameter of the glass filaments is 3-6 μm, and which can suppress the generation of fluff when made into glass cloth. [Solution] A glass yarn comprising a bundle of multiple glass filaments, wherein the glass material constituting the glass filaments contains 40-60% by mass of SiO2 and 15-35% by mass of B2O3, the number of glass filaments is 30-120, the average fiber diameter of the glass filaments is 3-6 μm, the count of the glass yarn is 0.3-6 tex, and the Worcester spot of the glass yarn is 0.5-2.0%.
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Citation Information
Patent Citations
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