Quality management items for clothing and apparel zippers

Quality management items for clothing and apparel zippers:

1, the specifications and models of the zipper

The specification of the zipper refers to the width and size range of the chain after the two teeth are engaged. The unit of measurement is millimeters. The specification of the zipper is the basis for the shape and size of each component, and is the most characteristic and important dimension. The model of the zipper chain is the shape of the zipper. , An important reflection of the structure and performance characteristics, the chain model of the zipper not only includes the specification requirements of the zipper chain, but also reflects the performance characteristics of the zipper chain, that is, the technical parameters of the zipper and the function of use.

2, the strength of the zipper

The strength of the zipper is the most important performance indicator, which determines the scope of use and durability of the zipper. In the zipper standards of various countries, the strength is clearly defined, and it is also the basis for testing the quality of the zipper. Different specifications and models of zippers have different strengths suitable for For different uses, zipper suppliers will generally give a reference selection of specifications and scope of use. The specifications and models of zippers must meet the requirements of use. Once confirmed, the specifications and models must meet the requirements of the order.

3, zipper chain length

The length of the zipper is related to the size of the clothing and the closure body or part of the clothing, and it is the most important size. The method of measuring the length of the zipper is: place the zipper flat on a flat table to make it in a natural state, and use a steel ruler to measure the length of the zipper. Measure from the top of the slider to the outer end of the bottom stop, and measure the open end zipper to the outer end of the socket.

During the production process of the zipper, due to the inertia of the equipment and the integrity of the connecting teeth, the length of the zipper is allowed to deviate, but it must be within a certain range.

4, the straightness of the zipper

The test method for the straightness of the zipper is: take a finished zipper, lay it flat on a flat platen to make it in a natural state, then move your fingers back and forth along both sides of the edge of the fastener element, and use a ruler to gradually move closer to the bend , and then use another ruler to measure the distance between the chain element foot and the ruler, this distance is the straightness.

5, the color of zipper and zipper tape

The color of the zipper and zipper tape must conform to the confirmation sample card and the confirmation sample. If a large body color is required, it must be checked with the fabric again, and at the same time, check whether there is a color difference in the same zipper, and whether there is a color difference in the same batch of zippers, generally it should be above GRADE3 .

6 zipper appearance

1. The straightness and flatness of the zipper: keep the zipper in a natural sagging state without wave back bending.

2. The elements of the zipper: the teeth of the injection-molded zipper are bright, there is no depression in the middle of the front, no missing teeth, the metal teeth are neatly arranged, not skewed, and there is no broken tooth chain, and the teeth have good occlusion.

3 The color of the injection molded zipper: the color is uniform, bright and bright, and there is no color difference.

4. The zipper tape is glued: the position of the zipper tape is symmetrical, and there is no skew. The glued place is repeatedly turned 180 degrees for 10 times and continues.

5 Slider: The coating of the electroplating slider is bright, no peeling, no foreign matter scratches, the thickness of the coating is not less than 3UM, the surface of the painted and sprayed slider is bright and the coating is uniform and firm, no bubbles, no dead corners and other defects.

7 Functions of the zipper

During inspection, the following operations can be performed to ensure that the zipper functions well.

Pull the slider to move back and forth, the slider slides smoothly and flexibly, without jumping or blocking feeling. Pay special attention to the upper stop, the lower stop and the opening of the slider when it is started without obstacles.

The flipping flap can be flipped flexibly within a range of 180 degrees.

Insert the cannula into the socket or pull out the cannula, flexible and barrier-free.

Open the two zipper tooth belts, the angle is about 60, and the pulling force is moderate. If the slider does not slide, it means that the slider is self-locking well; Pull up and the hood is firm.

8, Special performance requirements

1. Dyeing fastness: Generally, it is required that after immersion in hot water of 80°C for 15min, it is greater than grade 4 compared with the original.

2. Hand shrinkage rate: the shrinkage rate of the zipper is not more than 3% in water washing, and the shrinkage rate in dry cleaning is not more than 3%.

3. Resistant to organic solvents: immerse the zipper in a dilute ethylene solution with a temperature of 20+/-2 degrees Celsius for 2H, let it dry naturally, and the opening and closing of the zipper will maintain the original function.

4. Corrosion resistance of metal coating: in 3% sodium chloride solution, take out and dry naturally after 180 minutes, and visually check whether there is rust spots.

Information comes from clothing accessories hanger hook net