With the improvement of living standards, the demand for knitted sweaters is no longer limited to warm and warmth, but more and more attention is paid to its comfort and personalization. Elastic fibers is a major factor in the comfort of garments. Through the use of elastic fibers, along with the reasonable on-weaving and dyeing and finishing processes, elastic fibers can provide good resilience to fabrics and thus make the human body feel comfortable. Many advantages of wool make it the main raw material for knitted sweaters, but the dimensional stability of wool products and wash is a big problem plaguing the development of sweaters, wool and elastic silk combination, which can be a better solution to this A problem is the sweater industry an important direction. At present, flat knitting yarn products to use more spandex yarn to improve product flexibility and shape retention, higher product costs. To this end, we envision using CM800 instead of spandex core-spun yarn interwoven with wool, woven fabric. CM800, that is PTT / PET bicomponent filaments, which PTT and PET each account for 50%, and exist along the fiber axis side by side, the formation of parallel bicomponent filaments. PTT and PET belong to the same polyester material, but with different physical properties and thermal processing properties, PTT / PET composite fiber is the most prominent feature of the use of two components of different thermal properties, through the composite spinning method can be obtained with a high degree of natural curly and fluffy Sexual three-dimensional curly structure. Under-machine fabric after wet heat treatment processing, you can make the fabric straight fiber curl can be seen to form a thin and dense like wool curly morphology, giving the fabric good elasticity and bulkiness. Raw materials, the combination of wool and elastic yarn is usually achieved by weaving the yarn organization, so the raw material is divided into veil and ground yarn. Veil 32S / 2 pure wool yarn, ground yarn 150D / 64f PTT / PET bicomponent filaments and 40D / 70D nylon bag spandex elastic yarn. Weaving technology 11G hand-held flat knitting machine with flat knitting needles and 1 +1 rib knit woven to the ground, double-sided two Tim yarn fabric. It is found that the excellent elastic recovery performance of CM800 yarn can only be obtained after certain heat and moisture treatment, so the fabric containing CM800 should undergo proper finishing to show satisfactory elasticity. When finishing, the higher the temperature of the water bath, the longer the treatment time, the better the elastic properties of the yarn. However, given the characteristics of the other yarn in the gauze and the flexibility of the finished product, the proper temperature and time should be used. Specific steps are as follows: The CM800 fabric immersed in a water bath at 80 ℃ for 20 minutes (nylon package spandex not); FLOW0.5% lotion, bath ratio 1:30, at 60 ℃ for 10 minutes; rinsed with warm water at 40 ℃ 2 Times, and then washed with water; softener WA 2ml / L, acetic acid 0.5ml / L, bath ratio 1:30, soak at 50 ℃ for 20 minutes; dehydration drying. The test shows that the CM800 fabric is thinner than the spandex fabric of the same fineness and same weaving technology, the spandex fabric is thick and rough, rigid and rigid. The CM800 maintains the characteristics of lightness and softness after finishing, has novel drapeability, and is suitable for the development of knitting Sweater products. In addition, we conducted performance tests on several fabrics, including moisture permeability, thermal retention, pilling resistance, drape, and wrinkle resistance. Test results show that: CM800 fabric moisture permeability is poor, because of its poor hygroscopic yarn, and spandex nylon nylon outsourcing has greatly enhanced its hygroscopicity. CM800 fabric thermal insulation relative to the lower spandex, but still has a high thermal insulation. CM800 fabric drape is significantly better than spandex, while its anti-pilling pilling performance has been significantly improved, wrinkle resistance is also better. By comparing the performance of CM800 and nylon bag spandex yarn and fabric, CM800 fabric was found to have obvious advantages in some aspects. Although spandex is highly elastic, it is harder to control when weaving. At the same time, its production process is complicated and pollutes the environment, which does not meet the requirements of energy saving and emission reduction. As a result, PTT possesses the ability to replace nylon spandex yarns in some non-elastomeric applications. In addition, the price of spandex tens of thousands of yuan per ton, in addition to the need for a package of yarn processing, and PTT filament only a few million, lower cost, cost-effective obvious advantages, used in knitted sweaters, manufacturers can Through the lower cost of raw materials and high value-added products, with strong market competitiveness.