1. Fabric and lining
Because the fabric and lining are mainly used for the outside and inside of the bag. Customized surface of business backpack: The fabric should not have drawstring, the stripes of the yarn should be clear and uniform in color, the number of horizontal and straight stripes of the yarn should be sufficient, the thickness should be sufficient and the yarn should be straight. Rubber sole: The glue will be firm and will not come off the rubber sole, and the rubber sole will not turn white.
2. Ribbon
There are many types of webbing, such as plain, fine, pitted, etc., but each type of webbing has a standard weight. From the outside, check whether the two edges are smooth, whether the surface is uniform, and there is no drawing, no dyeing, no lint, etc.
3. Business backpack foam and sponge
It is mostly used between the fabric and the lining of the bag, and the finished bag cannot be seen. It mainly depends on whether the thick bottom and the density are enough (whether one square has enough weight). Good cotton is elastic and not easy to pull apart. Mesh material: It should be elastic, good in force, not easy to break, and there is no yarn breakage.
4. Zipper
The quality of zipper cloth and slider is mainly distinguished by grade: such as grades A, B, and C, the more advanced the grade, the better the quality. Specifications are distinguished by size: such as size 3, 5, 8, 10, etc., the larger the number, the larger the size. When pulling, it should be smooth, and the pull tab should be firm, not easy to be pulled apart, deformed, etc.
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