Slide fastener slider, and slide fastener

Abstract

A slide fastener slider, includes: a slider body; a puller, and a lock pin. The lock pin is made of a stainless steel material. A black oxide film is formed on a surface of the lock pin. The surface of the lock pin has brightness L* satisfying 31.70≤L*≤35.90, and a* of a value satisfying −0.708≤a*≤1.929, the brightness L′ and the a* of the value according to definitions in a CIELAB color space defined in JIS Z8781-4 (2013).

What is claimed is: 
     
         1 . A slide fastener slider, comprising:
 a slider body;   a puller; and   a lock pin,   wherein the lock pin is made of a stainless steel material,   wherein a black oxide film is formed on a surface of the lock pin, and   wherein the surface of the lock pin has brightness L* satisfying 31.70≤L*≤35.90, and a* of a value satisfying −0.708≤a*≤1.929, the brightness L* and the a* of the value according to definitions in a CIELAB color space defined in JIS Z8781-4 (2013).   
     
     
         2 . The slide fastener slider according to  claim 1 ,
 wherein the surface of the lock pin has b* of a value satisfying −2.428≤b*≤0.466, the b* of the value according to a definition in the CIELAB color space defined in JIS Z8781-4 (2013).   
     
     
         3 . The slide fastener slider according to  claim 1 ,
 wherein the stainless steel material for the lock pin is an austenitic stainless steel material containing 10 wt % to 14 wt % of nickel, and   wherein the surface of the lock pin has the brightness L* satisfying 31.70≤L*≤34.16, the a* of the value satisfying 0.369≤a*≤1.736, and b* of a value satisfying −2.428≤b*≤0.466, the brightness L*, the a* of the value and the b* of the value according to definitions in the CIELAB color space defined in JIS Z8781-4 (2013).   
     
     
         4 . The slide fastener slider according to  claim 1 ,
 wherein the stainless steel material for the lock pin is an austenitic stainless steel material containing 13 wt % to 17 wt % of manganese, and   wherein the surface of the lock pin has the brightness L* satisfying 33.04≤L*≤35.90, the a* of the value satisfying −0.708≤a*≤1.929, and b* of a value satisfying −2.388≤b*≤−1.495, the brightness L*, the a* of the value and the b* of the value according to definitions in the CIELAB color space defined in JIS Z8781-4 (2013).   
     
     
         5 . The slide fastener slider according to  claim 1 ,
 wherein the slider body is black, and   wherein according to the definitions in the CIELAB color space defined in JIS Z8781-4 (2013),   a difference ΔL* between brightness L* of the slider body and brightness L* of the lock pin satisfies ΔL*≤8.54, and   a difference Δa* between a* of a value of the slider body and a* of a value of the lock pin satisfies 0.03≤Δa*≤2.67.   
     
     
         6 . The slide fastener slider according to  claim 3 ,
 wherein the slider body is black, and   wherein according to the definitions in the CIELAB color space defined in JIS Z8781-4 (2013),   a difference ΔL* between brightness L* of the slider body and brightness L* of the lock pin satisfies ΔL*≤6.79, and   a difference Δa* between a* of a value of the slider body and a* of a value of the lock pin satisfies 1.11≤Δa*≤2.47.   
     
     
         7 . The slide fastener slider according to  claim 4 ,
 wherein the slider body is black, and   wherein according to the definitions in the CIELAB color space defined in JIS Z8781-4 (2013),   a difference ΔL* between brightness L* of the slider body and brightness L* of the lock pin satisfies ΔL*≤8.54, and   a difference Δa* between a* of a value of the slider body and a* of a value of the lock pin satisfies 0.03≤Δa*≤2.67.   
     
     
         8 . A slide fastener comprising:
 the slide fastener slider according to  claim 1 ,   wherein an element of the slide fastener is made of a ferritic stainless steel material, and the element has brightness L* satisfying 29.67≤L*≤36.24, a* of a value satisfying −0.63≤a*≤0.76, and b* of a value satisfying 0.42≤b*≤1.22, the brightness L*, the a* of the value and the b* of the value according to definitions in the CIELAB color space defined in JIS Z8781-4 (2013).   
     
     
         9 . The slide fastener according to  claim 8 :
 wherein the slider body is black, and   wherein according to the definitions in the CIELAB color space defined in JIS Z8781-4 (2013), a difference ΔL* between the brightness L* of the element and brightness L* of the slider body satisfies ΔL*≤8.94, and a difference Δa* between values of a* thereof satisfies 0.11≤Δa*≤1.49.   
     
     
         10 . The slide fastener slider according to  claim 1 ,
 wherein the oxide film on the surface of the lock pin has a thickness of 320 nm or more and 1870 nm or less.   
     
     
         11 . The slide fastener slider according to  claim 1 ,
 wherein the stainless steel material for the lock pin is an austenitic stainless steel material containing 10 wt % or more and 14 wt % or less of nickel, and a thickness of the oxide film on the surface of the lock pin is 320 nm or more and 1260 nm or less.   
     
     
         12 . The slide fastener slider according to  claim 1 ,
 wherein the stainless steel material for the lock pin is an austenitic stainless steel material containing 13 wt % or more and 17 wt % or less of manganese, and a thickness of the oxide film on the surface of the lock pin is 440 nm or more and 1870 nm or less.   
     
     
         13 . The slide fastener according to  claim 8 ,
 wherein a thickness of an oxide film on the element of the slide fastener is 1010 nm or more and 2700 nm or less.