Polyamide resin composition for slide fastener, slide fastener component, and slide fastener provided with same

Patent metadata

Field	Value
Publication number	US-10717830-B2
Application number	US-201616094311-A
Country	US
Kind code	B2
Filing date	May 13, 2016
Priority date	May 13, 2016
Publication date	Jul 21, 2020
Grant date	Jul 21, 2020

Abstract

Provided is a polyamide resin composition for a slide fastener that includes at least one polyamide resin and reinforcing fibers, wherein a total mass of the polyamide resin and the reinforcing fibers accounts for 90% by mass or more of the composition; wherein poly(m-xylylene adipamide) (MXD 6) accounts for 60% by mass or more of the polyamide resin; wherein reinforcing fibers account for 45 to 70% by mass of the total mass of the polyamide resin and the reinforcing fibers; wherein both first reinforcing fibers having a fiber diameter of from 5 to 7 μm and second reinforcing fibers having a fiber diameter larger than that of the first reinforcing fibers by more than 2 μm account for 90% by mass or more of the reinforcing fibers; and wherein the first reinforcing fibers account for 20% by mass or more and less than 50% by mass of the reinforcing fibers.

First claim

What is claimed is:

1. A polyamide resin composition for a slide fastener, comprising at least one polyamide resin and reinforcing fibers,
wherein a total mass of the polyamide resin and the reinforcing fibers accounts for 90% by mass or more of the composition;
wherein poly(m-xylylene adipamide) (MXD 6) accounts for 60% by mass or more of the polyamide resin;
wherein the reinforcing fibers account for from 45 to 70% by mass of the total mass of the polyamide resin and the reinforcing fibers;
wherein both first reinforcing fibers having a fiber diameter of from 5 to 7 μm and second reinforcing fibers having a fiber diameter larger than that of the first reinforcing fibers by more than 2 μm account for 90% by mass or more of the reinforcing fibers; and
wherein the first reinforcing fibers account for 20% by mass or more and less than 50% by mass of the reinforcing fibers.

2. The polyamide resin composition according to claim 1 , wherein the polyamide resin further comprises an aliphatic polyamide having a water absorption rate lower than that of poly(m-xylylene adipamide) (MXD 6).

3. The polyamide resin composition according to claim 2 , wherein the aliphatic polyamide having the water absorption rate lower than that of poly(m-xylylene adipamide) (MXD 6) accounts for from 5 to 20% by mass of the polyamide resin.

4. The polyamide resin composition according to claim 1 , wherein poly(m-xylylene adipamide) (MXD 6) accounts for 85% by mass or more of the polyamide resin.

5. The polyamide resin composition according to claim 1 , wherein the polyamide resin composition contains less than 4% by mass of a pigment relative to the total mass of the polyamide resin and the reinforcing fibers.

6. The polyamide resin composition according to claim 1 , wherein the fiber diameter of the second reinforcing fibers is from 9 to 14 μm.

7. The polyamide resin composition according to claim 1 , wherein all of the at least one polyamide resin in the polyamide resin composition have a glass transition temperature of lower than or equal to 120° C.

8. A slide fastener component made of the polyamide resin composition for the slide fastener according to claim 1 .

9. The slide fastener component according to claim 8 , wherein the slide fastener component comprises a pull tab.

10. The slide fastener component according to claim 8 , wherein the slide fastener component is dyed.

11. A slide fastener comprising the slide fastener component according to claim 1 .

12. The slide fastener according to claim 11 , wherein the slide fastener comprises a slider body made of a polyamide resin composition comprising: at least one polyamide resin; and reinforcing fibers, wherein a total mass of the polyamide resin and the reinforcing fibers accounts for 90% by mass or more of the composition; wherein an aliphatic polyamide accounts for 60% by mass or more of the polyamide resin; and wherein the reinforcing fibers account for from 45 to 70% by mass of the total mass of the polyamide resin and the reinforcing fibers.

13. A slide fastener comprising:
a pull tab made of the polyamide resin composition for the slide fastener according to claim 1 ; and
a slider body made of a polyamide resin composition comprising at least one polyamide resin and reinforcing fibers, wherein a total mass of the polyamide resin and the reinforcing fibers accounts for 90% by mass or more of the composition; wherein an aliphatic polyamide accounts for 60% by mass or more of the polyamide resin; and wherein the reinforcing fibers account for from 45 to 70% by mass of the total mass of the polyamide resin and the reinforcing fibers.

14. The slide fastener according to claim 13 , wherein each of the polyamide resin composition configuring the pull tab and the polyamide resin composition configuring the slider body contains less than 4% by mass of a pigment relative to the total mass of the polyamide resin and the reinforcing fibers; and wherein the slide fastener satisfies a ratio P 1 :P 2 =1.5:1 to 4:1, in which P 1 represents a concentration of the pigment relative to the total mass of the polyamide resin and the reinforcing fibers in the polyamide resin composition configuring the pull tab; and P 2 represents a concentration of the pigment relative to the total mass of the polyamide resin and the reinforcing fibers in the polyamide resin composition configuring the slider body.

15. The slide fastener according to claim 13 , wherein both the pull tab and the slider body are dyed.

Assignees

• Ykk Corp

Inventors

• Mizumoto Kazuya
• Wakasa Hironobu
• Yokogoshi Yasuhiro
• Ozaki Norihide

Classifications

• A44B19/24

  Details · CPC title

• A44B19/26

  Sliders · CPC title

• B29D5/00

  Producing elements of slide fasteners; Combined making and attaching of elements of slide fasteners · CPC title

• A44B19/12

  Interlocking member in the shape of a continuous helix · CPC title

• A44B19/00

  Slide fasteners · CPC title