What is bulked yarn?
Bulk yarn is first blended into yarn from two fibers with different shrinkage rates, and then the yarn is placed in steam or hot air or boiling water for treatment. At this time, the fibers that shrink the most shrink significantly and are located at the center of the yarn. In the center, the mixed low-shrinkage fibers are squeezed on the surface of the yarn to form a loop due to their small shrinkage, thereby obtaining a fluffy, plump, and elastic bulked yarn.
Wool ball → shearing machine → fan → small mixing bin → wool fiber (other fibers) of a certain length → cotton curtain opening mixing machine → fan → large mixing bin → mixed raw materials → packaging.
The transformation of the carding process mainly includes: cylinder, flat card clothing, licker-in card clothing and cotton feeding plate. The card clothing should be replaced with a special card clothing or dual-purpose card clothing suitable for spinning chemical fibers, and the cotton feed plate should be replaced with a double-curved working surface type suitable for spinning medium-long fibers. The bulked yarn itself is short fiber yarn or filament yarn, but it has a larger volume than the original yarn, and is bulky and soft.
1) Bulk yarn: Acrylic yarn fiber is thermoplastic. When stretched under heating, it will produce greater elongation, and then cooled and fixed to form high shrinkage fiber. This fiber is blended with ordinary fibers to make short fiber yarn. After steaming processing, the high shrinkage fibers shrink longitudinally and gather in the yarn core, while the ordinary fibers form curls or loops and bulge, making the yarn structure become Bulking indicates an increase in volume, which is bulked yarn.
2) Textured yarn refers to filament yarn that has undergone texturing processing. During the production process, some methods are used to cause permanent curls, loops and wrinkles in the silk fibers, thus increasing the gaps between the fibers and bulking the yarn body.
3) Elastic yarn Elastic yarn has a high degree of elongation (3-5 times) and recovery ability. When it is fully stretched, it acts like an ordinary filament yarn; when it is fully relaxed, it acts like a bulked yarn.
What is solid yarn?
Solid acrylic yarn is mainly composed of polyacrylonitrile. It is copolymerized with more than 85% acrylonitrile and no more than 15% first and third monomers. It is made into short fiber or fiber by wet or dry spinning. Filament. The acrylonitrile content accounts for more than 85%, which is called polyacrylonitrile. Pure polyacrylonitrile has a tight structure, is brittle and hard, and has poor dyeability. *** monomers usually use compounds containing ester groups, such as methyl acrylate, methyl methacrylate, vinyl acetate, etc. After the *** monomer is added, the regularity of the arrangement of macromolecules becomes worse, and the intermolecular forces Weakened, the fiber becomes looser in microstructure, the softness of the fiber is increased, the elasticity and feel are improved, and it is conducive to the introduction of dye molecules and improves the dyeability of the fiber.
It has good elasticity, second only to polyester, about 2 times higher than nylon, and has better shape retention. The light resistance of acrylic fiber is the best among all synthetic fibers, and its strength will only decrease by 20% after being exposed to the sun for one year. Because acrylic yarn has good fluffiness and soft feel, it is often used to make wool, carpets, etc.; because it has good weather resistance, mildew-proof, and moth-proof properties, it can also be spun purely or blended with natural fibers, and is widely used in various applications. Tarpaulin, decoration, industrial fields, curtains and other industries; because of its good warmth retention properties, it is also used to make clothing, plush, artificial fur, etc.
What is the difference between solid yarn and bulked yarn?
1. After dyeing or heating, bulked yarn will appear jagged, and the surface of the yarn will show a bulking effect. Solid yarn will not deform after being heated or dyed.
2. The bulked yarn contains shrinkable acrylic, which shrinks when encountering heat and moisture during the dyeing or bulking process, causing the yarn surface to show a bulking effect. It is mostly used in artificial fur or wool knitted sweaters. Solid yarn does not contain shrinkage components and is mostly used in woven fabrics.
3. Solid cotton will not shrink (i.e. does not shorten) under high temperature, while expanded cotton will shorten under high temperature. The shrinkage rate depends on the characteristics of the fiber itself. Simply put: bulked yarn will appear jagged after dyeing or heating, and the surface of the yarn will show a bulking effect. Solid yarn will not deform after being heated or dyed.
