There are many types of webbing in the webbing industry, which are widely used in various industrial sectors such as apparel, trademark printing, shoe materials, luggage, industry, agriculture, military supplies, and transportation. In the 1930s, webbing was produced by hand-crafted workshop webbing with exquisite pictures. The raw materials were cotton webbing made of cotton thread and cotton linen webbing made of hemp thread. After the founding of the People’s Republic of China, the raw materials for webbing gradually developed into nylon, polyester, polypropylene, spandex, viscose, etc., forming three major types of weaving, knitting, and knitting technologies. The webbing structure includes plain weave, twill weave, satin weave, jacquard ribbon, and double Layered, multi-layered, tubular and joint organization. Disassemble several warp and weft yarns of two unknown types of webbing and burn them with a lighter respectively. Observe some physical phenomena during the burning process to determine the raw materials of the warp and weft yarns. When burning, observe the flame, melting and smell, and the ashes after burning.
The following is the identification method of the ribbon factory for different materials:
Nylon webbing: near flame, it melts and burns, drips and foams. Does not continue to burn directly. It smells like celery. It is hard, round, light, brown to gray, and bead-like.
Polyester webbing: It melts and burns, drips and foams when it is near the flame. It can continue to burn, a few have smoke. Very weak sweetness. Hard round, black or light brown. Cotton fiber and hemp fiber.
Both cotton fiber and hemp fiber burn immediately near the flame, burning quickly, the flame is yellow, and blue smoke is emitted. The difference between the burning smell and the ashes after burning is that the cotton belt burns to give out the smell of paper, while the hemp cotton burns to give off the smell of plant ash; after burning, the cotton has very little powder ash, which is black or gray, and the hemp cotton produces a small amount. Off-white powder ashes.
Nylon and polyester
The scientific name of nylon (nylon) is polyamide fiber. It quickly crimps and melts into a white gel near the flame. It melts and drops and foams in the flame. There is no flame when burning. It is difficult to continue burning without the flame. It emits a celery smell. After cooling down Light brown melt is not easy to grind. The scientific name of polyester is polyester fiber. It is easy to ignite and melts when it is near the flame. When it burns, it emits black smoke while melting. It shows a yellow flame and emits an aromatic odor. Three ways to distinguish the good and bad of the webbing
Chromatic aberration test: This can be observed with the naked eye. Look at its color, texture, and stitch edges. It should not be messy, it should be a very pure color.
Shallow knowledge of quality:
Burr: It is usually the burr of some yarns. This can also be observed with the naked eye. There should be no serious hairballs and filaments on both sides of the webbing and the seam.
Skipped stitches: This can be observed by naked eyes, and the webbing must not have skipped stitches.