Glass fiber-reinforced resin molded article

Patent metadata

Field	Value
Publication number	US-11059946-B2
Application number	US-201716470028-A
Country	US
Kind code	B2
Filing date	Jun 29, 2017
Priority date	Dec 26, 2016
Publication date	Jul 13, 2021
Grant date	Jul 13, 2021

Abstract

Provided is a glass fiber-reinforced resin molded article having high tensile strength and high impact strength in combination with a low dielectric constant and a low dissipation factor. The glass fiber-reinforced resin molded article contains: 10 to 90 mass % of a glass fiber; and 90 to 10 mass % of a resin based on the total amount of the glass fiber-reinforced resin molded article, wherein the glass fiber has composition containing: 52.0 to 57.0 mass % of SiO2; 13.0 to 17.0 mass % of Al2O3; 15.0 to 21.5 mass % of B2O3; 2.0 to 6.0 mass % of MgO; 2.0 to 6.0 mass % of CaO; 1.0 to 4.0 mass % of TiO2; and less than 1.5 mass % of F2, and the total amount of Li2O, Na2O, and K2O is less than 0.6 mass %, based on the total amount of the glass fiber, and the glass fiber has a number-average fiber length of 30 to 5000 μm.

First claim

The invention claimed is:

1. A glass fiber-reinforced resin molded article comprising:
a glass fiber in a range of 10 to 90 mass %; and
a resin in a range of 90 to 10 mass % based on a total amount of the glass fiber reinforced resin molded article, wherein
the glass fiber has composition comprising:
SiO 2 in a range of 52.0 to 57.0 mass %;
Al 2 O 3 in a range of 13.0 to 17.0 mass %;
B 2 O 3 in a range of 15.0 to 21.5 mass %;
MgO in a range of 2.0 to 6.0 mass %;
CaO in a range of 2.0 to 6.0 mass %;
TiO 2 in a range of 1.0 to 4.0 mass %; and
less than 1.5 mass % of F 2 ,

provided that the total amount of Li 2 O, Na 2 O, and K 2 O is less than 0.6 mass %, based on the total amount of the glass fiber,
the total amount of Fe 2 O 3 , Cr 2 O 3 , ZrO 2 , MoO 3 , SO 3 , and Cl 2 is less than 0.4 mass %,
Fe 2 O 3 in a range of 0.05 to 0.15 mass %, and
the glass fiber has a number-average fiber length in a range of 30 to 5000 μm.

2. The glass fiber-reinforced resin molded article according to claim 1 , wherein the glass fiber comprises noncircular cross-section such that a ratio of a major axis to a minor axis (major axis/minor axis) in a cross-sectional shape is in a range of 2.0 to 10.0 and a fiber diameter determined by converting a cross-sectional area to a true circle equivalent in area is in a range of 3.0 to 35.0 μm.

3. The glass fiber-reinforced resin molded article according to claim 1 , wherein the glass fiber has composition such that a ratio of the B 2 O 3 content by percentage (mass %) to the TiO 2 content by percentage (mass %) (B 2 O 3 (mass %)/TiO 2 (mass %)) is in a range of 9.6 to 11.4.

Assignees

• Nitto Boseki Co Ltd

Inventors

• Tsuchigane Akane
• Onodera Yuya
• Takahashi Yuta
• Kurita Tadashi
• Aizawa Tsunefumi

Classifications

• C08L101/00

  Compositions of unspecified macromolecular compounds · CPC title

• C08J5/043 Primary

  with glass fibres · CPC title

• B29C45/0001

  characterised by the choice of material · CPC title

• C08K2201/003

  Additives being defined by their diameter · CPC title

• C08J5/08

  glass fibres · CPC title