How to distinguish the quality of metal zippers, resin zippers and nylon zippers?
Release time:
2024-11-19 14:35
1. Zipper straightness
The test method for the straightness of a zipper is: take a finished zipper, place it flat on a flat plate, and keep it in a natural state. Then use your fingers to move back and forth along the edges of the chain teeth once, and use a ruler to gradually move closer to the bend. Then use another ruler to measure the distance between the chain tooth foot and the ruler. This distance is the straightness.
2. Zipper strength
The strength of a 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, there are clear regulations on strength, which is also the basis for testing the quality of zippers. Zippers of different specifications and models have different strengths and are suitable for different purposes. Zipper suppliers generally provide a reference selection of specifications and models and scope of use. The specifications and models of zippers must meet the requirements of use. Once confirmed, their specifications and models must meet the requirements of the order.
3. Specifications of zippers
The specification of a zipper refers to the width and size range of the chain after two teeth are connected. The unit of measurement is millimeter. The specification of a zipper is the basis for the shape and size of each component and is the most important dimension with characteristics. The zipper model is an important reflection of the shape, structure and performance characteristics. The zipper model not only includes the zipper specification requirements, but also reflects the zipper performance characteristics, that is, the zipper technical parameters and usage functions.
4. The color of the zipper and zipper tape
The color of the zipper and zipper tape must conform to the color of the sample card. If a larger color is required, it must be checked again with the fabric. At the same time, check whether there is any color difference in the same zipper or in the same batch of zippers.
Matters needing attention in continuous dyeing of ribbons
2024-11-19
1. Factors of ribbon blanks: First of all, we should pay attention to whether the yarn used in the ribbon blanks is from the same batch, because the "oil" contained in different batches of yarn is different. If it is blended, it will become a factor of the color in the dyeing process; secondly, whether the blank has been pre-treated. The dyeing effect of the refined blank is very good, because the "oil" on the yarn is removed after treatment, and the dye can be directly in contact with the fiber for dyeing without protection.