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Methods for the identification of zipper quality A, the common methods to identify the zipper quality Cloth: cloth dyeing is uniform, no stain, no scars, and soft to the touch, in a vertical direction or in the horizontal direction, cloth to wave type. Teeth: tooth surface should be smooth, soft feel when pulling Kai Chang, and less noise. Pull head: self-locking pull head pull Kai ease, rather than locking slide. Cloth: cloth sticking buckle belt, not easy to break, fall off. Box, plug: overlap freely, fastening tape. Top stop, next stop: A, stop to be closely linked to the first grain of tooth (metal, nylon), but the distance cannot be more than 1mm and fit perfectly. Under B, only closely teeth or clamp on top, and fit perfectly. Important B, choose the zipper China garment accessories net www.fuliao.com small make up remind, because the zipper have different adaptability in different environments, so in the purchase should be to the manufacturers put forward special zipper: A zipper applications, where products (such as luggage, shoes and boots, ski clothing, raincoats, tents, to wash water jeans or acidic larger leather category) or other special requirements. Two, the requirements of the zipper elements, whether azo free (AZO), does not contain nickel, or through needle detector. C, zipper length tolerance (table CM) allowance of length 30 under the positive and negative 5MM More than 30 60 under positive and negative 5MM More than 60 120 under positive and negative 15MM More than 120 plus or minus 2% for zipper in the production process, the inertia machinery operating speed generated and consider the integrity of the zipper chain teeth, there will be permitted tolerances, and the length is longer, the greater the difference between the allow public. Method for determination of zipper strength: * lateral tension zipper (2.5cm) Determination of resistance to tension of ordinary zipper and zipper: with vertical direction angle and fixed speed force acting on the zipper, determination of resistance to tension. * anti tension zipper top Fixed to the bottom end of the zipper, pull buckle to pull zipper top, force by acting on the top in zipper pull buckle, can measure the size of tensile strength. * anti tension zipper bottom Pull buckle and pull to the chain at the bottom, two flat chain left and right, can measure the bottom tension. * the bottom end of the horizontal tension zipper Zipper opening of the lower end of part fixed to the tensile detector (only the lower end fixed as shown in the figure of the opening part) to the lower end of the zipper first zipper teeth with clamp edges in a horizontal line, that determining the tension. * zip lock strength Zip lock in the middle of the two zipper zipper, a left and right without tooth of a zipper lock, anti strength and the zipper can be determined. * the overall strength of the zipper (90 DEG C) For a full zipper, zipper buckle part when force is applied to the heavy plate and the lower part of the zipper, zipper can be anti tension measurement, in addition to the left shown 90 C. Measuring method, another method is 45 C measurement method. |
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