Laminated polyarylene sulfide heat-resistant filter

Patent metadata

Field	Value
Publication number	US-10688753-B2
Application number	US-201716086443-A
Country	US
Kind code	B2
Filing date	Mar 13, 2017
Priority date	Mar 29, 2016
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

A laminated polyarylene sulfide heat-resistant filter has a plurality of layers, at least including a first web layer that is a filtering surface, and a second web layer that is a non-filtering surface, the laminated polyarylene sulfide heat-resistant filter being characterized in that the first web layer contains 30 to 70 wt % of polyarylene sulfide fibers having a fineness of 0.5 to 1.2 dtex, and 30 to 70 wt % of polyarylene sulfide fibers having a fineness of 1.3 to 3.0 dtex taking a total of a weight percentages of the first web layer as 100 wt %, wherein the second web layer contains polyarylene sulfide fibers having a fineness of 1.0 to 4.0 dtex.

First claim

The invention claimed is:

1. A laminated polyarylene sulfide heat-resistant filter comprising a plurality of layers, at least including a first web layer that is a filtering surface, and a second web layer that is a non-filtering surface, wherein
the first web layer consists of 30 to 70 wt % of polyarylene sulfide fibers having a fineness of 0.5 to 1.2 dtex, and 30 to 70 wt % of polyarylene sulfide fibers having a fineness of 1.3 to 3.0 dtex, based on a total of a weight percentages of the first web layer as 100 wt %, and
the second web layer consists of polyarylene sulfide fibers having a fineness of 1.0 to 4.0 dtex.

2. The laminated polyarylene sulfide heat-resistant filter according to claim 1 , wherein an average fineness X 1 of the fibers constituting the first web layer and an average fineness X 2 of the fibers constituting the second web layer satisfy formula (1):
X 1 <X 2   (1).

3. The laminated polyarylene sulfide heat-resistant filter according to claim 2 , further comprising a support layer between the first web layer and the second web layer.

4. The laminated polyarylene sulfide heat-resistant filter according to claim 3 , wherein the support layer is a polyarylene sulfide spun yarn woven fabric having an MD strength of 1000 N/5 cm or more and a CD strength of 500 N/5 cm or more.

5. The laminated polyarylene sulfide heat-resistant filter according to claim 2 , wherein the laminated polyarylene sulfide heat-resistant filter has a thickness of 1.5 to 2.5 mm, and the laminated polyarylene sulfide heat-resistant filter has an apparent density of the entirety of 0.20 to 0.40 g/cm 3 .

6. The laminated polyarylene sulfide heat-resistant filter according to claim 2 , wherein an air permeability when ventilated at a static pressure of 125 kPa is 5 cc/cm 2 /sec or more.

7. The laminated polyarylene sulfide heat-resistant filter according to claim 1 , further comprising a support layer between the first web layer and the second web layer.

8. The laminated polyarylene sulfide heat-resistant filter according to claim 7 , wherein the support layer is a polyarylene sulfide spun yarn woven fabric having an MD strength of 1000 N/5 cm or more and a CD strength of 500 N/5 cm or more.

9. The laminated polyarylene sulfide heat-resistant filter according to claim 8 , wherein the laminated polyarylene sulfide heat-resistant filter has a thickness of 1.5 to 2.5 mm, and the laminated polyarylene sulfide heat-resistant filter has an apparent density of the entirety of 0.20 to 0.40 g/cm 3 .

10. The laminated polyarylene sulfide heat-resistant filter according to claim 8 , wherein an air permeability when ventilated at a static pressure of 125 kPa is 5 cc/cm 2 /sec or more.

11. The laminated polyarylene sulfide heat-resistant filter according to claim 7 , wherein the laminated polyarylene sulfide heat-resistant filter has a thickness of 1.5 to 2.5 mm, and the laminated polyarylene sulfide heat-resistant filter has an apparent density of the entirety of 0.20 to 0.40 g/cm 3 .

12. The laminated polyarylene sulfide heat-resistant filter according to claim 7 , wherein an air permeability when ventilated at a static pressure of 125 kPa is 5 cc/cm 2 /sec or more.

13. The laminated polyarylene sulfide heat-resistant filter according to claim 1 , wherein the laminated polyarylene sulfide heat-resistant filter has a thickness of 1.5 to 2.5 mm, and the laminated polyarylene sulfide heat-resistant filter has an apparent density of the entirety of 0.20 to 0.40 g/cm 3 .

14. The laminated polyarylene sulfide heat-resistant filter according to claim 13 , wherein an air permeability when ventilated at a static pressure of 125 kPa is 5 cc/cm 2 /sec or more.

15. The laminated polyarylene sulfide heat-resistant filter according to claim 1 , wherein an air permeability when ventilated at a static pressure of 125 kPa is 5 cc/cm 2 /sec or more.

16. The laminated polyarylene sulfide heat-resistant filter according to claim 1 , wherein an air permeability when ventilated at a static pressure of 125 kPa is 5 to 12.6 cc/cm 2 /sec.

Assignees

• Toray Industries

Inventors

• Mori Tatsuya
• Sugimoto Takeshi
• Mitsunaga Reo

Classifications

• B32B2307/72

  Density · CPC title

• B32B5/277

  including an additional non-woven fabric layer · CPC title

• B32B2307/724

  Permeability to gases, adsorption · CPC title

• B32B2307/54

  Yield strength; Tensile strength · CPC title

• B32B2307/306

  Resistant to heat · CPC title