Glass chopped strand mat, glass chopped strand mat roll, method for manufacturing glass chopped strand mat and automotive molded ceiling material

Patent metadata

Field	Value
Publication number	US-10196011-B2
Application number	US-201715834385-A
Country	US
Kind code	B2
Filing date	Dec 7, 2017
Priority date	Mar 10, 2014
Publication date	Feb 5, 2019
Grant date	Feb 5, 2019

Abstract

In a glass chopped strand mat, a short chopped strand layer having first glass chopped strands with an average length of 25.4 to 76.2 mm and a long chopped strand layer having second glass chopped strands with an average length of 76.2 to 203.2 mm are laminated, a difference between the average length of the first glass chopped strands and that of the second glass chopped strands is 25.4 mm or greater, the short chopped strand layer occupies 50 to 70 parts by mass, and the long chopped strand layer occupies 30 to 50 parts by mass with respect to 100 parts by mass of the glass chopped strand mat, a mass per unit area of the glass chopped strand mat is 180 g/m 2 or lower, and a loss on ignition of the glass chopped strand mat measured on the basis of JIS R 3420 is lower than 10%.

First claim

The invention claimed is:

1. An automotive molded ceiling material comprising:
a glass chopped strand mat in which glass chopped strands are deposited in a sheet shape and are bound together by a binder made of a thermoplastic resin; and
a resin foam sheet laminated and adhered onto the glass chopped strand mat,
wherein a short chopped strand layer having first glass chopped strands with an average length of 25.4 mm to 76.2 mm and a long chopped strand layer having second glass chopped strands with an average length of 76.2 to 203.2 mm are laminated,
a difference between the average length of the first glass chopped strands and the average length of the second glass chopped strands is 25.4 mm or greater,
with respect to 100 parts by mass of the glass chopped strand mat, the short chopped strand layer occupies 50 to 70 parts by mass, and the long chopped strand layer occupies 30 to 50 parts by mass,
a mass per unit area of the glass chopped strand mat is 180 g/m 2 or lower, and
a loss on ignition of the glass chopped strand mat measured on the basis of JIS R 3420 is lower than 10%.

2. The automotive molded ceiling material according to claim 1 , wherein, with respect to 100 parts by mass of the binder present in the glass chopped strand mat, the binder present in the short chopped strand layer occupies 20 to 40 parts by mass, and the binder present in the long chopped strand layer occupies 60 to 80 parts by mass.

3. The automotive molded ceiling material according to claim 1 ,
wherein the glass chopped strand mat is wound around a winding core into a roll shape, and
the long chopped strand layer is disposed on an inside.

4. The automotive molded ceiling material according to claim 1 , wherein the yarn counts of the first glass chopped strands and the second glass chopped strands are the same.

5. The automotive molded ceiling material according to claim 1 , wherein the first glass chopped strands has an average length of 25.4 mm to 63.5 mm , and the second glass chopped strands has an average length of 76.2 to 127.0 mm.

6. The automotive molded ceiling material according to claim 1 , wherein the mass per unit area of the glass chopped strand mat is from 20 to 150 g/m 2 .

7. The automotive molded ceiling material according to claim 1 , wherein the mass per unit area of the glass chopped strand mat is from 45 to 95 g/m 2 .

8. The automotive molded ceiling material according to claim 1 , wherein the loss on ignition of the glass chopped strand mat measured on the basis of JIS R 3420 is from 8.5 to 9.5 wt %.

9. The automotive molded ceiling material according to claim 1 , wherein
the first glass chopped strands has an average length of 25.4 mm to 63.5 mm,
the second glass chopped strands has an average length of 76.2 to 127.0 mm;
the mass per unit area of the glass chopped strand mat is from 45 to 95 g/m 2 ; and
the loss on ignition of the glass chopped strand mat measured on the basis of JIS R 3420 is from 8.5 to 9.5 wt %.

Assignees

• Nitto Boseki Co Ltd

Inventors

• OMIYA Mitsuhiro
• Suzuki Masatoshi

Classifications

• D04H1/593

  to layered webs · CPC title

• D04H1/4374

  using different kinds of webs, e.g. by layering webs · CPC title

• B32B2307/30

  having particular thermal properties · CPC title

• B32B2262/101

  Glass fibres · CPC title

• B32B2260/021

  Fibrous or filamentary layer · CPC title