Glass chopped strand mat, method for producing same, automotive molded ceiling material, and method for producing same

Patent metadata

Field	Value
Publication number	US-9637066-B2
Application number	US-201214237581-A
Country	US
Kind code	B2
Filing date	Dec 5, 2012
Priority date	Dec 20, 2011
Publication date	May 2, 2017
Grant date	May 2, 2017

Abstract

Provided is a high-quality and high-functionality glass chopped strand mat which is applicable to recent automotive molded ceiling materials which have excellent design and reduced weights. The glass chopped strand mat is a glass chopped strand mat (M) produced by forming glass chopped strands (S) into a sheet, in which the ratio of a tensile strength in a width direction to a tensile strength in a longitudinal direction (the width direction/the longitudinal direction) of the glass chopped strand mat (M) is at least 0.73 and less than 1.00, and the tensile strength in the width direction is not less than 80 N as measured in a tensile rupture test conducted according to the Japanese Industrial Standards (Section 7.25 of JIS R3420 (2006)), where the width of a test specimen is 150 mm.

First claim

The invention claimed is:

1. A glass chopped strand mat produced by forming glass chopped strands into a sheet, wherein
the ratio of a tensile strength in a width direction to a tensile strength in a longitudinal direction (the width direction/the longitudinal direction) of the glass chopped strand mat is at least 0.73 and less than 1.00,
wherein the tensile strength in the width direction is 80 N to 154 N as measured in a tensile rupture test conducted according to the Japanese Industrial Standards (Section 7.25 of JIS R3420 (2006)), where width of a test specimen is 150 mm.

2. The glass chopped strand mat of claim 1 , wherein
the glass chopped strands have a weight of 50 to 150 g/m 2 , where the weight is the mass per unit area.

3. A method for producing an automotive molded ceiling material, comprising:
a layering step of putting the glass chopped strand mat of claim 1 on one or both sides of a flexible base sheet.

4. A method for producing an automotive molded ceiling material, comprising:
a layering step of putting the glass chopped strand mat of claim 2 on one or both sides of a flexible base sheet.

5. An automotive molded ceiling material including a glass chopped strand mat produced by forming glass chopped strands into a sheet, and a flexible base sheet on one or both sides of which the glass chopped strand mat is provided, wherein
the ratio of a tensile strength in a width direction to a tensile strength in a longitudinal direction (the width direction/the longitudinal direction) of the glass chopped strand mat is at least 0.73 and less than 1.00,
wherein the tensile strength in the width direction is 80 N to 154 N as measured in a tensile rupture test conducted according to the Japanese Industrial Standards (Section 7.25 of JIS R3420 (2006)), where width of a test specimen is 150 mm.

Assignees

• Nippon Electric Glass Co

Inventors

• Abe Jiro
• Nishie Satoshi
• Sugimoto Kiyomasa

Classifications

• B60R13/0212 Primary

  Roof or head liners (movable head-liners B60J7/0007) · CPC title

• D04H1/74

  the fibres being orientated, e.g. in parallel {(anisotropic fleeces)} · CPC title

• B32B2266/0278

  Polyurethane · CPC title

• D04H1/60

  the bonding agent being applied in dry state, e.g. thermo-activatable agents in solid or molten state, and heat being applied subsequently · CPC title

• B32B2605/003

  Interior finishings · CPC title