Patent ID: 9259061
Filing Date: 2016-02-16
CPC Classification: A44B,B29C,B29D,B29K,B32B,Y10T

Claim Text:
1. A slide fastener comprising: a pair of left and right fastener tapes; a plurality of fastener elements made of a synthetic resin and attached along opposing side edges of the fastener tapes, wherein flat metal foil containing aluminum is mixed with the synthetic resin, and an average particle diameter of the metal foil is between 3 μm and 8 μm and upper and lower stoppers, wherein each fastener element has a body portion fixed to one of the fastener tapes and a head portion protruding toward a tip end via a neck portion; each fastener element has a first element half part disposed on a front surface side of the fastener element in a tape front and back direction, and a second element half part disposed on a rear surface side of the fastener element in the tape front and back direction, the first element half part has a first element surface and a second element surface, the second element surface slopes downward toward the tip end of the head portion from the first element surface so that a size of the first element half part in the tape front and back direction decreases towards the tip end; the first element surface is formed such that a size of the first element surface gradually decreases in a tape length direction toward a tape inner side of the fastener tape, and the second element surface is formed such that a size of the second element surface gradually decreases in the tape length direction toward the tip end; and at least one of the first element surface and the second element surface is a flat surface with an area between 0.4 mm