Aluminum alloy fastening member, fastener chain and method for producing aluminum alloy fastening member

Patent metadata

Field	Value
Publication number	US-12351895-B2
Application number	US-202117367045-A
Country	US
Kind code	B2
Filing date	Jul 2, 2021
Priority date	Jul 6, 2020
Publication date	Jul 8, 2025
Grant date	Jul 8, 2025

Abstract

An aluminum alloy fastening member has a novel chemical includes conversion coating as a colored coating, a fastener chain. A method producing the aluminum alloy fastening member. The aluminum alloy fastening member includes a chemical conversion coating containing manganese as a component element, and the chemical conversion coating satisfies hue ranges of −3≤a*≤12, −5≤b*≤35, and 45≤L*≤80 in a CIELAB color space as defined by JIS Z 8781-4 (2013).

First claim

The invention claimed is:

1. An aluminum alloy fastening member comprising a chemical conversion coating containing manganese as a component element,
wherein the chemical conversion coating satisfies hue ranges of 0≤a*≤10, 5≤b*≤18, and 45≤L*≤60 in a CIELAB color space as defined by JIS Z 8781-4 (2013), and
wherein the aluminum alloy has a composition represented by a general formula Al x Si y Mg c , in which:
each of x, y, and c is % by mass;
symbol x is a balance;
0.1≤y≤1.5;
4.5≤c≤5.6; and
unavoidable impurities are configured to be contained,
wherein the aluminum alloy fastening member comprises a clear coating on the chemical conversion coating, and
wherein the clear coating has an average thickness of 1.7 μm or more and 36.5 μm or less.

2. The aluminum alloy fastening member according to claim 1 , wherein the chemical conversion coating comprises a manganese element in an amount of more than 0% by mass and 35% by mass or less.

3. The aluminum alloy fastening member according to claim 1 , wherein the chemical conversion coating has an average thickness of 0.05 μm or more and 3.00 μm or less.

4. The aluminum alloy fastening member according to claim 1 , wherein the aluminum alloy fastening member is an element for slide fastener, a slider for slide fasteners, a stopper for slide fasteners, or a button.

5. A fastener chain, comprising:
the aluminum alloy fastening member according to claim 1 ; and
fastener tapes made of a plurality of threads,
wherein the aluminum alloy fastening member is an element for a slide fastener, and the elements for slide fasteners are attached to the fastener tapes, and
wherein an amount of a manganese element remaining in the fastener tapes is less than 90 ppm.

6. A method for producing the aluminum alloy fastening member according to claim 1 , comprising a step of forming a chemical conversion coating containing manganese as a component element by immersing the aluminum alloy fastening member in a metal coloring solution for chemical conversion treatment, the metal coloring solution comprising permanganic acid or a salt thereof, and one or both of an inorganic acid and a salt thereof, and a condensed phosphate.

7. The method for producing the aluminum alloy fastening member according to claim 6 , wherein the permanganate or the salt thereof is permanganic acid, sodium permanganate, potassium permanganate, zinc permanganate, magnesium permanganate, calcium permanganate, ammonium permanganate, or a combination thereof.

Assignees

• Ykk Corp

Inventors

• Urita Yuki
• Ogihara Atsushi
• Tsuchida Shigeru
• Hiromi Chikako
• Ara Ryota
• Nagasawa Sohei
• Katori Mitsuomi
• Hosaka Misako

Classifications

• C23C22/66

  Treatment of aluminium or alloys based thereon · CPC title

• B32B15/016

  all layers being formed of aluminium or aluminium alloys · CPC title

• A44B19/04

  Stringers arranged edge-to-edge when fastened {, e.g. abutting stringers} · CPC title

• C23C22/56

  Treatment of aluminium or alloys based thereon · CPC title

• A44B19/24

  Details · CPC title