Identification Methods Of Zipper Quality
A,
Zipper quality
Commonly used identification methods
Tape
The cloth is dyed evenly, no stain, no scar, and soft handle. The cloth should be wavy in the vertical direction or in the horizontal direction.
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
Ingredients
The requirement is whether it does not contain AZO (AZO), nickel free, or needle detector.
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%
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