Waterproof zipper and process of manufacturing same
AssigneeWin-Chain Knitting Co., Ltd.
InventorHung-Chao Chen
Life of this patent
Estimating the term…
Abstract
A waterproof zipper is provided with two halves, each including a half tape member and a row of protruding teeth along an inner edge of the half tape member; and a waterproof layer is secured to an inner surface of the halves. A process of manufacturing the waterproof zipper is also provided, including the steps of: (a) guiding the waterproof layer to a position above the two halves on a continuous flow production line, each half having a half tape member and a row of protruding teeth along an inner edge of the half tape member; (b) coating a waterproof layer on a releasing layer; (c) drying both the waterproof layer and the releasing layer in an oven.
Claims2
A waterproof zipper comprising:
- two halves, each including a half tape member and a row of protruding teeth along an inner edge of the half tape member;
- and
- a waterproof layer is secured to an inner surface of the halves,
- wherein the waterproof layer comprises 10% to 21% by weight of dimethylacetamide, 30% to 41% of methyl ethyl ketone, 4% to 12% of toluene, 1% to 7% of N-methyl-2-pyrrolidone, and 36% to 47% of polyurethane resin.
A method for manufacturing a waterproof zipper, comprising the steps of:
- (a) guiding a waterproof layer to a position above two halves on a continuous flow production line, each half having a half tape member and a row of protruding teeth along an inner edge of the half tape member;
- (b) coating a waterproof layer on a releasing layer;
- (c) drying both the waterproof layer and the releasing layer in an oven;
- (d) pressing the halves on the waterproof layer at a pressure range from 10 kg/cm2 to 30 kg/cm2 by means of a pressing device in a temperature range from 40° C. and 140° C. to secure the waterproof layer and the releasing layer together;
- (e) removing the releasing layer from the waterproof layer;
- (f) drying both the waterproof layer and the halves in the oven again;
- (g) cooling both the waterproof layer and the halves for a predetermined period of time;
- (h) removing both the waterproof layer and the halves from the continuous flow production line;
- and
- (i) placing both the waterproof layer and the halves in an environment for five to seven days to produce a finished waterproof zipper,
- wherein the waterproof layer comprises 10% to 21% by weight of dimethylacetamide, 30% to 41% of methyl ethyl ketone, 4% to 12% of toluene, 1% to 7% of N-methyl-2-pyrrolidone, and 36% to 47% of polyurethane resin.
Dependencies are inferred from the claim text.