The teeth of the coil zippers are made of monofilament polyesters. These zippers are applicable for various segments in the market ranging from apparel industry such as manufacturing of pants, jackets, kidswear and coats to the production of furniture, seat covers, tents and many more.
1. Coil zipper without cord: Its teeth are made of monofilament and create a hollow spiral.
2. Coil zipper with cord: Its teeth are also made of monofilament which centres round the centre-cord and then form a spiral.
3. Invisible zipper: The formation its teeth are similar to that of the coil zipper with cord but they are covered by the zipper tape while zipping it up, which makes them invisible on the front end.
How to install coil zippers?
During the tooth cutting process, some portion of the teeth on the zipper tape would be cut off. But half surplus tooth close to the top stop would be there for the zipper usage.
If the gap between the forth head tape where it is folded and then bent and the top stop located on the upper portion of the zipper is too close in the installation process, then the surplus half tooth introduced by the tooth-cutting process may be exposed. This in turn may harm the consumer. Thus the distance between the forth head tape and the first tooth should be minimum 5cm. The coil zipper with plastic top/bottom stops or U-type top stop should be used to avoid such problem.
Special care is needed while installing the invisible zippers. Take their attachment to the clothing that involves splicing for example. This splicing gets thick while the fabric is folded and if the sewing quality is bad then the sliding track of the zipper would get narrow. This would make it difficult to open and close the zipper, leading to damaging the tape while pulling the zipper forcefully. Thus the distance between the splicing section and zipper chain should be more than 2cm when the invisible zipper is used.
Usage of coil zippers
1. Rubberizing waterproof coil zippers
A layer of TPU film is attached to its tape that serves a purpose of water-repellent one. The side of the zipper where the film is attached would appear dark compared to the other side. However, this is not the waterproof zipper as water may leak through the gap in the zipper tape.
Below are the tips for using this type of zipper to avoid unanticipated hurdles and for better performance of the products they are attached to.
Zipper up the zipper completely while washing the garment and dry them naturally in proper ventilated place in order to avert the film from getting damaged.