Move your thumb and pay attention to it. Knitting requires that the strips (that is, the uniformity of the thickness of the yarn) are higher, the softness is good, the strength and elongation, and the twist (the yarn twist are relatively low). In the process of forming the knitted fabric on the knitting machine, the yarn is subjected to the yarn. Complex mechanical effects such as stretching, bending, torsion, friction, etc. In order to ensure the normal production and the quality of the product, the knitting yarn should meet the following requirements. 1, the yarn should have a certain strength and extensibility The strength of the yarn is an important quality indicator for the yarn for knitting. Since the yarn is subjected to a certain tension and repeated loading during preparation and weaving, the knitting yarn must have a certain strength. 2, the yarn should have good softness The softness of the yarn for knitting is higher than that of the yarn for weaving. Because the soft yarn is easy to bend and twist, and the coil structure in the knitted fabric is uniform, the appearance is clear and beautiful, and the yarn breakage during the weaving process and the damage to the looping mechanism are also reduced. 3, the yarn should have a certain degree of twist In general, the knitting yarn has a lower twist than the woven yarn. If the twist is too large, the softness of the yarn is poor, it is not easy to be bent and twisted during weaving, and it is easy to cause kinking, which causes woven fabric and damages the knitting needle; therefore, correct selection of twist is a reasonable selection of yarn. Important way. 4, the linear density of the yarn should be uniform, less yarn defects The uniformity of yarn linear density, that is, the uniformity of the yarn strands, is an important quality indicator for knitting yarns. The evenly-spun yarn facilitates the knitting process and ensures the quality of the fabric, so that the coil structure is uniform and the cloth surface is clear. 5, the yarn should have good hygroscopicity The ability of a yarn to absorb moisture in the air is called hygroscopicity. The hygroscopic capacity of various fibers varies greatly, and the amount of moisture absorption varies with the temperature and humidity of the air. Yarns used in knitting production should have a certain hygroscopicity. 6, the yarn should have a good finish and a small coefficient of friction Knitting yarns should be as free of impurities and grease as possible, and should be smooth. The non-smooth yarn has a great damage to the machine parts, which is easy to damage the machine parts, and there are many flying flowers in the workshop, which affects the health of the workers and affects the productivity of the knitting machine and the quality of the fabric. Source: China Knitting Net
Outdoor Leather
Outdoor pvc leather includes the yacht leather,Outdoor placemat leather,beach chair leather,Beach toy leather,Film and television prop leather and so on.
Outdoor pvc leather has wide range use.So the quality of different use will be much different.
For example:beach chair leather.It always be low thickness and tiny pattern.Price will not be very high.But for the tacht leather,it has good wear-resisting,warer reisitant,scratch resistant.With higher thickness and rough pattern,it takes a higher price.
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