Liaoning Duolun Machinery Co., LTD
Add: No 18, Ganquan Road, Zhenxing District, Dandong, Liaoning,China
Tel: 0086- 415- 6181481
Fax: 0086- 415- 6178681
Zip code: 118009
Drawing machine drawing machine is a mechanical device used for nylon, polyester, polypropylene filament production in the process of drafting twist process. By spinning machine of polyester, nylon, polypropylene raw silk (POY, udy) after twisting drafting the has certain linear density (size), strength and elongation degree and other physical properties can be directly or by texturing for weaving use. Drawing machine uses and characteristics: for in the lapping machine stack on the output of the fiber web longitudinal step by step stretch, the fiber orientation changes, improved aspect strength ratio of fiber network; three and five groups of draft form, the groups were independent transmission, variable frequency speed regulation, adjustment of traction for example, convenient and reliable, drawing roller surface coating special metal needle cloth. Oven heating hot rolling shaping combined yarn winding stretch machine is drafting machine a, the drawing machine pull design for a portal frame structure door frame have a pair of roll extrusion film with water and another to roll or two on and for clamps the membrane tension for wire cutting.
Carbon fiber is a new material with excellent mechanical properties. Its specific gravity is less than steel 1/4. The tensile strength of carbon fiber composite material is 7~9 times, it is 3500Mpa times of steel, and the tensile modulus of 23000~43000Mpa is higher than that of steel. So the CFRP strength than the material strength and density ratio to 2000Mpa/ (g / cm3) above, and A3 steel strength only about 59Mpa/ (g / cm3), the specific modulus also than steel. Higher than the strength of the material, component weight smaller, higher than the modulus, the greater the component stiffness, from this meaning has predicted the carbon fiber broad prospect of application in the engineering, overview of many new kinds of composite materials, such as polymer composites, metal matrix composites, ceramic matrix composite, excellent performance, many people expected, human in the material application is from the iron age into a composite materials have been widely used.
As the name suggests, it not only has the inherent characteristics of carbon materials, but also has a soft and flexible textile fiber, is a new generation of enhanced fiber. Compared with the traditional glass fiber (GF) and Young's modulus is 3 times as much; it is compared with that of Kevlar fiber (KF-49), not only young's modulus is the 2 times the left and right sides, and in organic solvent, acid and alkali insoluble expansion and corrosion resistance of outstanding. There are scholars in 1981 will pan based CF soaking in NaOH alkali solution, the time has past more than 20 years, it has remained fiber morphology.
Stretching is an essential step in the manufacturing process of polyester fiber. It is often referred to as the second stage of the forming of the polyester fiber, or the two forming process. It is not only a necessary means to improve the physical and mechanical properties of the fiber, but also to test the way to get good or bad. In the stretching process, the large molecules or aggregates of the structural elements are stretched and aligned along the fiber axis. The orientation change at the same time, often with similar state, and other characteristics of the institution changes.
As a result of the fibers within the macromolecules of stretching process oriented along the fiber axis, formation and increased the hydrogen bonding and dipole bond, and other types of intermolecular force fiber under external tension of chain molecules increase in the number, so that the breaking strength of the fiber significantly increased, elongation decreased, abrasion resistance and on a variety of different types of deformation fatigue strength also obviously increased. draw machine