Glass-fiber-reinforced resin composition and molded glass-fiber-reinforced resin article
Provided is a glass fiber-reinforced resin composition that has excellent strength and an excellent modulus when processed into a glass fiber-reinforced resin molded article and has excellent processability on producing a glass fiber-reinforced resin molded article. In the glass fiber-reinforced resin composition, the content of SiO 2 S is 48 to 70% by mass and the content of Al 2 O 3 A is 9 to 30% by mass with respect to the total amount of the glass fiber included therein, the glass fiber comprises a flat cross-sectional shape having a minor axis DS of 6.0 to 15.0 μm and a major axis DL of 20.5 to 50.0 μm, the glass fiber content C in the glass fiber-reinforced resin composition is from 65.0 to 85.0% by mass, and S, A, DS, DL, and C satisfy the following formula (1). 2.24 ≤ ( 100 × ( A 2 / S ) × ( C / 100 ) 8 ) / ( DS 3 / 4 × DL 1 / 4 ) ≤ 5.85 ( 1 )
1 . A glass fiber-reinforced resin composition, wherein
in glass fiber included in the glass fiber-reinforced resin composition, a content of SiO 2 S with respect to a total amount of the glass fiber is in a range of 48 to 70% by mass,
in the glass fiber included in the glass fiber-reinforced resin composition, a content of Al 2 O 3 A with respect to the total amount of the glass fiber is in a range of 9 to 30% by mass,
number average fiber length of the glass fiber is in the range of 250 to 500 μm,
the glass fiber comprises a flat cross-sectional shape having a minor axis DS in a range of 6.0 to 15.0 μm and a major axis DL in a range of 30.5 to 50.0 μm,
a glass fiber content C in the glass fiber-reinforced resin composition is in a range of 70.5 to 85.0% by mass, and
the S, A, DS, DL, and C satisfy following formula (1):
2.24
≤
(
100
×
(
A
2
/
S
)
×
(
C
/
100
)
8
)
/
(
DS
3
/
4
×
DL
1
/
4
)
≤
5.85
.
(
1
)
2 . The glass fiber-reinforced resin composition according to claim 1 , wherein
the S is in a range of 50 to 60% by mass, the A is in a range of 10 to 20% by mass, the DS is in a range of 7.5 to 13.0 μm, the DL is in a range of 30.5 to 48.0 μm, and the C is in a range of 70.5 to 82.5% by mass, and
the S, A, DS, DL, and C satisfy following formula (2):
2.27
≤
(
100
×
(
A
2
/
S
)
×
(
C
/
100
)
8
)
/
(
DS
3
/
4
×
DL
1
/
4
)
≤
4.3
.
(
2
)
3 . The glass fiber-reinforced resin composition according to claim 2 , wherein
the S, A, DS, DL, and C satisfy following formula (3):
2.29
≤
(
100
×
(
A
2
/
S
)
×
(
C
/
100
)
8
)
/
(
DS
3
/
4
×
DL
1
/
4
)
≤
3.37
.
(
3
)
4 . The glass fiber-reinforced resin composition according to claim 1 , wherein the resin included in the glass fiber-reinforced resin composition is a thermoplastic resin for injection molding selected from a group consisting of polyamide resins, polybutylene terephthalate resins, polycarbonate resins, polyarylene sulfide resins, polyaryl ketone resins, and liquid crystal polymer (LCP).
5 . The glass fiber-reinforced resin composition according to claim 4 , wherein
the resin included in the glass fiber-reinforced resin composition is a polyamide resin.
6 . A glass fiber-reinforced resin molded article formed from the glass fiber-reinforced resin composition according to claim 1 .
7 . The glass fiber-reinforced resin composition according to claim 2 , wherein the resin included in the glass fiber-reinforced resin composition is a thermoplastic resin for injection molding selected from a group consisting of polyamide resins, polybutylene terephthalate resins, polycarbonate resins, polyarylene sulfide resins, polyaryl ketone resins, and liquid crystal polymer (LCP).
8 . The glass fiber-reinforced resin composition according to claim 3 , wherein the resin included in the glass fiber-reinforced resin composition is a thermoplastic resin for injection molding selected from a group consisting of polyamide resins, polybutylene terephthalate resins, polycarbonate resins, polyarylene sulfide resins, polyaryl ketone resins, and liquid crystal polymer (LCP).
9 . A glass fiber-reinforced resin molded article formed from the glass fiber-reinforced resin composition according to claim 2 .
10 . A glass fiber-reinforced resin molded article formed from the glass fiber-reinforced resin composition according to claim 3 .
11 . A glass fiber-reinforced resin molded article formed from the glass fiber-reinforced resin composition according to claim 4 .
12 . A glass fiber-reinforced resin molded article formed from the glass fiber-reinforced resin composition according to claim 5 .
13 . A glass fiber-reinforced resin molded article formed from the glass fiber-reinforced resin composition according to claim 7 .
14 . A glass fiber-reinforced resin molded article formed from the glass fiber-reinforced resin composition according to claim 8 .