Slide fastener provided with molded component
Provided is a molded component for slide fasteners, which has a good balance between mechanical strength and platability. This molded component for slide fasteners is made of a resin composition that contains 30-50% by mass of a polyamide and 50-70% by mass of reinforcing fibers, with the total of the polyamide and the reinforcing fibers being substantially 100% by mass. In the resin composition, the polyamide has a weight average molecular weight of 30,000-80,000, and 50% by mass or more of the polyamide is composed of an aliphatic polyamide.
1. A slide fastener comprising:
a slider made of a resin composition;
a pull-tab made of the resin composition and engaged with the slider for pulling the slider;
an element for sliding the slider; and
a top stop on the element for stopping the slider,
wherein the resin composition consists of 30 to 50% by mass of a polyamide and 50 to 70% by mass of reinforcing fibers, with the total of the polyamide and the reinforcing fibers being substantially 100% by mass, wherein the polyamide has a weight average molecular weight of 61,600 to 65,000,
wherein the resin composition has a melt flow rate of 6 to 50 g/10 min measured at 320 degrees C. and a measuring load of 2.16 kg,
wherein a proportion of an aliphatic polyamide is 80 parts by mass or more based on 100 parts by mass of the total amount of the polyamide, wherein the aliphatic polyamide comprises at least one selected from the group consisting of nylon 6, 6, nylon 6, 10, and nylon 6,12, and
wherein a surface of the slider and the pull-tab has been subjected to fluorine gas treatment to have a carboxyl group equivalent of 1.5 atom % or more, and at least a part of the surface of the slider and the pull-tab is metal plated.
2. The slide fastener according to claim 1 , wherein the proportion of the aliphatic polyamide is 100 parts by mass based on 100 parts by mass of the total amount of the polyamide.
3. The slide fastener according to claim 1 , wherein the aliphatic polyamide comprises at least one aliphatic polyamide obtained by co-polycondensation of an aliphatic diamine and an aliphatic dicarboxylic acid.
4. The slide fastener according to claim 1 , wherein the reinforcing fibers comprise at least one selected from the group consisting of glass fibers, carbon fibers, and aramid fibers.
5. The molded component for slide fasteners according to claim 1 , wherein an average fiber length of the reinforcing fibers after molding is 0.1 mm to 1.0 mm.