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Wholesale top produce ratchet tie down metal flat J hook

Identify Rigging straps the material of the webbing. Experienced people will know what the material is, the width and thickness of the webbing as soon as they touch the webbing. But as a newcomer who has just stepped into the webbing industry, it is obviously necessary to rely on the accumulation of experience to reach this level. The methods to distinguish the webbing include: touch the feel of the webbing, observe its color, burning, Nylon, that is, nylon webbing feels soft, smooth, bright in color, good gloss, and lighter; polypropylene webbing feels astringent and hard, Rough and poor gloss; polyester webbing has a relatively rigid color, but has good color fastness and heavier specific gravity; polyester staple fiber is also called polyester civil silk, commonly known as polyester cotton polyester civil silk has a feel similar to cotton, and has a soft feel.

 

Purple Polyester Duplex Flat Webbing Sling with Reinforced Lifting Eyes 1 Tonne

 

Ignite it with fire, observe the state of the burning flame, smell the smell after burning, and look at the residue after burning to judge the material of the webbing. Both cotton fiber and hemp fiber burn immediately near the flame and burn quickly. The flame is yellow with blue smoke. The difference between the burning smell and the ashes after burning is that the burning of cotton gives off the smell of paper, and the burning of hemp gives off the smell of plant ash; after burning, the cotton has very little powder ash, which is black or gray. Hemp produces a small amount of off-white powder ashes. Polyamide fiber, the scientific name of nylon nylon, is quickly crimped and melted into a white gel near the flame. It melts and drops and foams in the flame. There is no flame when burning, and it is difficult to continue burning away from the flame. Exudes a celery flavor, the light brown melt is not easy to grind after cooling.

 

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 smell. After burning, the ashes are dark brown lumps, which can be broken with fingers.The scientific name of vinylon is polyvinyl formal fiber. It is not easy to ignite. It melts and shrinks near the flame. There is a little flame at the top when it burns. When the fiber is melted into a gel, the flame becomes larger, there is thick black smoke, and it emits a bitter odor. Bead-shaped particles can be crushed with fingers.The scientific name of polyvinyl chloride fiber is polyvinyl chloride fiber. It is hard to burn and extinguishes when you leave the fire. The flame is yellow, with green white smoke at the bottom, emitting a pungent, pungent and sour smell. After burning, the ashes are dark brown irregular lumps, and fingers are not easy to twist. The scientific name of acrylic fiber is polyacrylonitrile fiber. It softens and shrinks near fire. It emits black smoke after fire. The flame is white. After leaving the flame, it burns quickly.

 

It emits a bitter smell of burning meat. After burning, the ashes are irregular black lumps, which are easily broken by hand twist. . The scientific name of polypropylene fiber is polypropylene fiber, which melts near the flame and is flammable. It burns slowly and emits black smoke from the fire. The upper end of the flame is yellow and the lower end is blue, emitting a smell of petroleum. The ashes after burning are hard round light yellow-brown particles, easy to twist by hand. broken. The scientific name of spandex is polyurethane fiber. It melts and burns near the fire. The flame is blue when it burns. It continues to melt away from the fire and emits a special pungent odor. The ashes after burning are soft and fluffy black ash. The scientific name of fluorine fiber is polytetrafluoroethylene fiber. ISO organization calls it fluorite fiber. It only melts near the flame, hard to ignite, and does not burn. The edge flame is blue-green and carbonized, melted and decomposed. The gas is toxic, and the melt is hard round black. Beads. Fluorine fiber is often used in the textile industry to make high-performance sewing threads.