Identification Methods Of Zipper Quality

A,

Teeth: the surface of the teeth should be smooth, with soft and smooth hands and less noise.

Pull head: self locking pull head is easy to pull, lock and not slide.

Sticking cloth: it is not easy to break and fall off.

Square and sheath: interspersed freely and fasten cloth tape.

Upper and lower stops:

The first gear (metal and nylon) should be tightly attached to the A and the upper end, but the distance should not exceed 1mm.

B, bottom clasp teeth or pliers on top, and solid and perfect.

B, important tips for purchasing zippers

Because zippers have different adaptability in different environments, they should make special recommendations to manufacturers when purchasing zippers.

1. What kind of products are zippers used (such as leather suitcase, footwear, ski suit, raincoat, tent, jeans or acid skin) or other special requirements.

Two. Pair of zippers

C, zipper length tolerance

Due to the inertia generated by the speed of mechanical operation and the integrity of the chain teeth, the zipper will have tolerances, and the longer the length, the greater the allowable tolerance.

Germany and Japan YKK tolerance table:

Germany DIN, 3419, Section 2.1

Zipper length (mm) tolerances

250 below +-5mm

250-1000 less than +-10mm

1000-5000 not full +-1%

More than 5000 +-50mm

Germany and Japan YKK tolerance table:

Zipper tolerances presented by YKK in Japan at the new century Fair

Zipper length (mm) tolerances

30 below +-5mm

60-100 less than +-15mm

1000-5000 less than +-1%

More than 100 +-3%