Application and development of PTT on non-woven fabrics

According to the characteristics of PTT fiber, its application on non-woven fabrics has the following advantages: it has higher elongation at break than PET and PA fibers, which will give PTT non-woven fabrics better tearing strength; The lower initial modulus of PTT fiber makes the bending stiffness of the fiber small. According to theoretical calculation, 1. 7 bending stiffness of dtexPTT fiber and 1. 29dtex nylon 66 and 1. 06 dtex's PET fiber is equivalent, which makes PTT fiber soft, easier to puncture, and saves energy; With higher combing efficiency; More likely to dye; Due to the good curl retention of the fiber, it has better elastic response rate and elastic recovery performance. Under the condition of 5cN/cm2, after 3 combing and drafting, 1. The volume mass of PTT staple fiber of 7dtex is 22cm3/g, while 1. The PET fiber of 7dtex is only 12cm3/g. Making full use of the structure and characteristics of PTT fibers, hollow parallel composite fibers can be made by parallel composite method for non-woven fabric filling materials. Using the low-temperature staining performance of PTT fiber relative to PET fiber, some polyamide fibers can be replaced in the field of non-woven fabrics requiring low-temperature staining. PTT, PET, PA, PP and other staple fibers are mixed, and PTT-based non-woven fabrics with soft hand feeling and good fluffiness can be prepared by acupuncture, spunlaced and other methods, or directly by spunbond or melt spray method. As can be seen from the existing reports, PTT-based non-woven fabrics are mostly obtained by spunbond method and meltblown method. Spunbond method, like other polyester fibers, PTT fibers have a large specific gravity, so it can overcome the limitation of the ability of the spray plate and make ultra-fine denier silk, which can be widely used in the field of non-woven fabrics. By Hills/sq high speed spinning or Reifenh? PTT-based non-woven fabrics can be produced by user's low-speed spinning and bonding production equipment. If the process parameters are used to set the correct calender for processing, it can be used in Reifenh? The user low-speed spunbond device obtains a fiber mesh with low strength and high elongation. The Spunbonded Nonwoven currently being developed by Shell can be used as a base fabric for PTT carpets. PTT-based non-woven fabrics with high-speed spinning adhesive method have soft hand feeling and good drape, and have outstanding resistance & gamma; Ray function (Especially in 2. 5 must and 5. 0 must). Suffered & gamma; Ray damage is a major problem in medical PP non-woven fabrics. However, PET non-woven fabrics lack softness and are difficult to squeeze out, but PTT spunbonded non-woven fabrics do not have the above problems. PTT-based leather core and parallel spunbond non-woven fabrics. PTT can be used as PET- PTT parallel spunbond or melt-blown non-woven fabric adhesive, while PET and PTT polymers have different heat shrinkage rates, which will lead to better fluffiness. PTT-based Island fibers can also be used to make microfibers for artificial leather. In addition, PTT and PA, PP and PE composite fibers are also under study. The melting temperature of PTT melt-blown non-woven fabrics is generally 260 ℃ ~ At 275 ℃, a fiber net randomly arranged or orderly can be formed, and the density can be as light as 12. 2g/m2 non-woven fabric is soft to the touch and has good drape. When a thicker structure is formed, the non-woven fabric will be thicker and harder. This may be caused by the residual heat of the fiber on the drum. PTT melt-blown non-woven fabric is essentially different from PP non-woven fabric. It does not have many bonding points like PP melt-blown non-woven fabric. PTT melt-blown non-woven fabric is actually a kind of'Non-adhesive spunbond'Structure of non-woven fabric.