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

Patent metadata

Field	Value
Publication number	US-10064454-B2
Application number	US-201415123521-A
Country	US
Kind code	B2
Filing date	Apr 9, 2014
Priority date	Apr 9, 2014
Publication date	Sep 4, 2018
Grant date	Sep 4, 2018

Abstract

Provided is a polyamide resin composition that is suitable as a material for slide fastener parts having good strength after being dyed. A polyamide resin composition for a slide fastener, comprising a polyamide resin and reinforcing fibers, wherein a total mass of the polyamide resin and the reinforcing fibers is 90% by mass or more of the composition; wherein a proportion of an aromatic polyamide having a melting point of from 200 to 250° C. in the polyamide resin is more than 70% by mass; and wherein a content of the reinforcing fibers in the total mass of the polyamide resin and the reinforcing fibers is from 45 to 70% by mass.

First claim

What is claimed is:

1. A polyamide resin composition for a slide fastener, which has absorbed water, the composition comprising a polyamide resin and reinforcing fibers, wherein a total mass of the polyamide resin and the reinforcing fibers is 90% by mass or more of the composition; wherein a proportion of an aromatic polyamide having a melting point of from 200 to 250° C. in the polyamide resin is more than 70% by mass; and wherein a content of the reinforcing fibers in the total mass of the polyamide resin and the reinforcing fibers is from 45 to 70% by mass, wherein the aromatic polyamide is polyamide MXD6 having a saturated water absorption rate of 5% or more measured according to JIS K7209-2000, and
wherein a melt flow rate of the polyamide resin composition is from 10 to 50 g/10 min.

2. The polyamide resin composition according to claim 1 , wherein the proportion of the aromatic polyamide having the melting point of from 200 to 250° C. in the polyamide resin is more than 80% by mass.

3. The polyamide resin composition according to claim 1 , wherein the polyamide resin further contains an aliphatic polyamide having a water absorption rate less than that of the aromatic polyamide and having a melting point is from 200 to 250° C.

4. The polyamide resin composition according to claim 1 , wherein the proportion of the aromatic polyamide having the melting point of from 200 to 250° C. in the polyamide resin is from 80 to 95% by mass; and wherein a proportion of the aliphatic polyamide having the water absorption rate less than that of the aromatic polyamide and having the melting point of from 200 to 250° C., in the polyamide resin, is from 5 to 20% by mass.

5. A part for a slide fastener, made of the polyamide resin composition for a slide fastener according to claim 1 .

6. The part for a slide fastener according to claim 5 , wherein the part is a pull tab, a pull tab cover, a top stop, a bottom stop or an element.

7. The part for a slide fastener according to claim 5 , wherein the part is the element.

8. A fastener stringer in which a plurality of elements according to claim 7 are attached to a side edge of a fastener tape to form an element row.

9. A slide fastener comprising the part for a slide fastener according to claim 7 or the fastener stringer according to claim 8 .

10. The slide fastener according to claim 9 , further comprising a slider body made of a polyamide resin composition comprising a polyamide resin and reinforcing fibers, the composition being such that a total mass of the polyamide resin and the reinforcing fibers is 90% by mass or more of the composition, and a proportion of an aliphatic polyamide having a melting point of from 220 to 310° C. in the polyamide resin is 60% by mass or more, and a content of the reinforcing fibers in the total mass of the polyamide resin and the reinforcing fibers is from 45 to 70% by mass.

11. The part for a slide fastener according to claim 5 , wherein the part has been dyed with an acid dye.

12. A slide fastener comprising at least one part selected from a group consisting of a pull tab, a pull tab cover, a top stop, a bottom stop and element rows made of the polyamide resin composition for a slide fastener according to claim 1 .

13. The slide fastener according to claim 12 , which comprises a pull tab and a pull tab cover made of the polyamide resin composition according to claim 1 , and which further comprises a slider body made of a polyamide resin composition comprising a polyamide resin and reinforcing fibers, the composition being such that the total mass of the polyamide resin and the reinforcing fibers is 90% by mass or more of the composition, and a proportion of an aliphatic polyamide having a melting point of from 220 to 310° C. in the polyamide resin is 60% by mass or more, and a content of the reinforcing fibers in the total mass of the polyamide resin and the reinforcing fibers is from 45 to 70% by mass.

14. The slide fastener according to claim 12 , which comprises an element row made of the polyamide resin composition according to claim 1 , and which further comprises a slider body made of a polyamide resin composition comprising a polyamide resin and reinforcing fibers, the composition being such that a total mass of the polyamide resin and the reinforcing fibers is 90% by mass or more of the composition, and a proportion of an aliphatic polyamide having a melting point of from 220 to 310° C. in the polyamide resin is 60% by mass or more, and a content of the reinforcing fibers in the total mass of the polyamide resin and the reinforcing fibers is from 45 to 70% by mass.

15. The slide fastener claim 12 , further comprising a slider body made of a polyamide resin composition comprising a polyamide resin and reinforcing fibers, the composition being such that a total mass of the polyamide resin and the reinforcing fibers is 90% by mass or more of the composition, and a proportion of an aliphatic polyamide having a melting point of from 220 to 310° C. in the polyamide resin is 60% by mass or more, and a content of the reinforcing fibers in the total mass of the polyamide resin and the reinforcing fibers is from 45 to 70% by mass.

Assignees

• Ykk Corp

Inventors

• Mizumoto Kazuya
• Kojima Masayoshi
• Ozawa Takanori
• Hanyu Masahiro
• Sato Hideki

Classifications

• A44B19/26 Primary

  Sliders · CPC title

• A44B19/262

  Pull members; Ornamental attachments for sliders · CPC title

• A44B19/36

  Means for permanently uniting the stringers at the end; Means for stopping movement of slider at the end · CPC title

• A41D2500/50

  Synthetic resins or rubbers · CPC title

• A44B19/24 Primary

  Details · CPC title