Glass fiber-reinforced resin molded article

Patent metadata

Field	Value
Publication number	US-12139591-B2
Application number	US-202218014223-A
Country	US
Kind code	B2
Filing date	Mar 28, 2022
Priority date	May 31, 2021
Publication date	Nov 12, 2024
Grant date	Nov 12, 2024

Abstract

In the glass fiber-reinforced resin molded article, the glass fiber has a flat cross-sectional shape having a ratio of the major axis to the minor axis (major axis/minor axis) in the range of 5.0 to 10.0, the thermoplastic resin is polyaryletherketone, the number average fiber length L of the glass fiber having a length of 25 μm or more contained in the glass fiber-reinforced resin molded article is in the range of 50 to 300 μm, the proportion PS of the glass fiber having a length of 25 to 100 μm contained in the glass fiber-reinforced resin molded article is in the range of 20.0 to 60.0%, the proportion PL of the glass fiber having a length of 500 μm or more is in the range of 1.0 to 15.0%; and the L, PS, PL satisfy the following formula (1).39.5≤L×PS2/(1000×PL)≤82.4  (1)

First claim

The invention claimed is:

1. A glass fiber-reinforced resin molded article comprising:
a glass fiber portion in a range of 15.0 to 50.0% by mass with respect to the total amount of the glass fiber-reinforced resin molded article; and
a polyaryletherketone thermoplastic resin, wherein
the glass fiber portion consists of:
glass fiber having a flat cross-sectional shape having a major axis in a range of 29.5 to 55.0 μm and a ratio of the major axis to a minor axis (major axis/minor axis) in a range of 5.0 to 10.0,
the glass fiber having a length of 25 μm or more, and
the glass fiber comprises a composition including:
SiO 2 in a range of 52.0 to 56.0% by mass,
Al 2 O 3 in a range of 12.0 to 16.0% by mass,
MgO and CaO in a range of 20.0 to 25.0% by mass in total, and
B 2 O 3 in a range of 5.0 to 10.0% by mass, with respect to a total amount of the glass fiber,

a number average fiber length L (μm) of the glass fiber having a length of 25 μm or more contained in the glass fiber-reinforced resin molded article is in a range of 50 to 300 μm;
a proportion P S (%) of the glass fiber having a length in a range of 25 to 100 μm with respect to the total number of the glass fiber having a length of 25 μm or more contained in the glass fiber-reinforced resin molded article is in a range of 20.0 to 60.0%;
a proportion P L (%) of the glass fiber having a length of 500 μm or more with respect to the total number of the glass fiber having a length of 25 μm or more contained in the glass fiber-reinforced resin molded article is in a range of 1.0 to 15.0%; and
the L (μm), P S (%), and P L (%) satisfy a following formula (1):
39.5≤ L×P S 2 /(1000× P L )≤82.4  (1).

2. The glass fiber-reinforced resin molded article according to claim 1 , wherein the L (μm) is in a range of 75 to 250 μm, the P S (%) is in a range of 30.0 to 50.0%, the P L (%) is in a range of 2.0 to 6.0%, and the L, P S , and P L satisfy a following formula (2):
55.9≤ L×P S 2 /(1000× P L )≤81.9  (2).

3. The glass fiber-reinforced resin molded article according to claim 1 , wherein the L (μm) is in a range of 80 to 190 μm, the P S (%) is in a range of 35.0 to 50.0%, the P L (%) is in a range of 2.0 to 5.0%, and the L, P S , and P L satisfy the following formula (3):
71.1≤ L×P S 2 /(1000× P L )≤80.1  (3).

Assignees

• Nitto Boseki Co Ltd

Inventors

• Sasaki Ryo
• Nukui Yosuke

Classifications

• C08L71/10 Primary

  from phenols · CPC title

• C08K2201/004

  Additives being defined by their length · CPC title

• C08G2650/40

  containing ketone groups, e.g. polyarylethylketones, PEEK or PEK · CPC title

• C08L71/00

  Compositions of polyethers obtained by reactions forming an ether link in the main chain (of polyacetals C08L59/00; of epoxy resins C08L63/00; of polythioether-ethers C08L81/02; of polyether-sulfones C08L81/06); Compositions of derivatives of such polymers · CPC title

• C08K7/14 Primary

  Glass · CPC title