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The development of spunbond and meltblown nonwovens and the expansion of product applications have promoted the use of high-performance polymers to meet the special needs of industrial textiles, such as high temperature, chemical resistance, good strength and elasticity, and medical applications. Product comfort, food contact safety and other requirements. The production equipment provided by many spunbonded nonwoven equipment manufacturers uses traditional PP , PET , COPET , PE , PA , COPA , PBT , PTT , some high performance fiber-forming polymers in spunbond, meltblown nonwovens It is also used. Such as polyoxymethylene copolymer ( POM ), cyclic polyolefin copolymer ( COC ), thermoplastic polyester elastomer ( TPE? E ), polyphenylene sulfide ( PPS ) and so on.
( 1 ) Elastomer Material
In 2008 , the INDEX 08 Raw Materials Award organized by EDANA was awarded to Vistamaxx TM 2125 developed by ExxonMobil Chemical . Vistamaxx TM 2125 is a metallocene plastomers superior performance thermoplastic elastomers. Vistamaxx TM has a special semi-crystalline structure and good compatibility with other polymers, easy processing, can be independently used as starting material, may form a blend with other polymers. Workability of cast film is very similar to PP was prepared, film properties: density less than 1.0 g /> / cm 3, an elongation at break greater than 500%, tensile strength greater than 24.5 MPa, a flexural modulus of 10.5 ~ 11.2 MPa .
Vistamaxx TM are increasingly being used in the nonwovens industry, such as health-absorbent material, medical and filtration materials and so on. In addition, with this elastomeric polymer, spunbond nonwovens companies can produce elastic nonwovens in just one step on a variety of spunbond equipment. Vistamaxx TM can also be used for the production of a multi-die nonwoven fabric, or as a multi-layer composite in which one layer of nonwoven fabric.
China National Bridge Industrial Company (the NBI) Vistamaxx TM recently used special elastic spunbond elastomeric invention Marnix one kind of nonwoven fabric, it combines the advantages of double nonwovens and of elastic fabric, stretchable 2 to 5 times , Elastic recovery capacity of more than 90% , and soft touch, can be applied to medical and other fields. Marnix is a biodegradable recycler and has now applied for a patent.
United States DOW (Dow) chemical company, today announced the launch of nine will develop market-oriented type olefin block copolymer, will be marketed as INFUSE TM olefin block copolymers sales. INFUSE TM olefin block copolymer having a special block structure, an unprecedented combination of performance and improved processability. Dow application INSITE TM technology to achieve innovation of this material, INSITE TM technology enables olefin elastomer material can be widely used for flexible product mix as well as many of the potential market. This material can bring excellent personal comfort, is a bomb
Films and ideal materials for elastic nonwovens for diapers and adult incontinence products. Developed olefin block copolymers offer the advantages of liquid packaging, adhesives, hygiene and health products, and requirements for hand-feeling comfort products for processing, compounding, and end-use applications.
Kraton Polymers LLC, the world's leading engineering polymer producer, introduced its latest innovation in elastic nonwoven technology— MD6705 . According to Kraton , MD6705 breaks through the barriers to traditional styrenic block copolymers and now allows processing plants to produce bicomponent elastic nonwovens at full speed on industrial production facilities. Previously, two-component elastic nonwovens based on thermoplastic elastomers were difficult to produce. Polymers suitable for textiles generally do not have very good elasticity, and the unique design of MD6705 achieves processing at industrial production rates and produces very good elasticity. In the production lines of Hills , Reifenhauser and Oerlikon Neumag with PP , PET and nylon sleeves , the product has been shown to be capable of high-speed machining. At present, non-woven fabrics with different weights and core-to-core ratios can be produced, and the properties of the finished fabric can be easily fine-tuned to meet specific use requirements. Nonwovens made with this new bicomponent fiber technology can be used as elastic materials in personal hygiene products such as diaper belts, diaper waistbands, training pants side panels, adult incontinence products, and feminine hygiene Supplies materials and so on. In addition, it can also be applied to clothing, medical equipment parts, industry, food service, automotive parts and sporting goods.
Japan's Idemitsu Kosan used its own single-site catalyst to develop a new type of soft polyolefin synthesized from propylene and butene called LMPO (Table 4 ). It is said that the nonwoven fabric made of LMPO has excellent elasticity without any other support. In addition, the material also has high thermal stability, low melt viscosity, odorless, non-adhesion, colorless and transparent, compatible with PP and other characteristics, and applies to certain solvents. In addition, its molecular weight and melt viscosity can also be controlled as needed. LMPO suitable for spunbond and meltblown processes, Idemitsu Kosan Company has partnered with Reifenhauser company, trial production on Reicofil 4 S? Bico system.
Spin- bonded or melt-blown nonwovens based on LMPO will be used mainly for the main parts (front and side) of diapers, and are expected to enter the medical and sports products. In addition, LMPO can also be used as a polyphenylene polymer or additive for hot melts , adhesives, films, or other fibers.
( 2 ) Microfiber raw materials
US Ticona PBT company is launching a product -? Celanex2000 K, an alternative plan for the production of PET homogeneous, two-component spunbond fibers. According to Ticona , the shrinkage of this new PBT process is smaller than that of conventional PET . Not only does the prepared fiber be softer and more supple, but it can also produce finer fibers than PET , and it can even be comparable to PP pilot-produced fine fiber. . Celenex 2000TM can be blended with PET to not only reduce the stiffness of the PET fiber but also improve its processability.
A new water-dispersible polymer developed by Eastman Chemical Co. , Ltd. , EastONE S85030 , can be used to process sea-island or segmented microfibre so that non-woven fabrics have the drape and feel of ordinary woven fabrics. This copolyester is mainly used for filtration, processing of non-woven fabrics, such as high-strength fabrics. Ultrafine fibers processed with this copolymer do not require chemical treatment, thereby reducing fiber damage. This material is primarily used in melt systems, including spunbond and meltblown nonwoven processes.
( 3 ) High performance meltblown materials
Japan's Toyobo (Toyobo) Corporation has used its patented technology to develop a high-strength meltblown PE fiber called " Tsunoga " . According to the test, Tsunooga fiber is light and its cutting resistance is better than para-aramid, so it is expected to be used in various industrial fields. In addition, it also has light, water and chemical stability, but also suitable for pre-staining of various colors.
US meltblown equipment manufacturers Biax? Fiberfilm company recently announced that they launched an ultra-high strength meltblown material, the use of this material, people just use a process can produce three previous steps (S, M, S) to Completed product, and product performance, including tensile strength, water repellency, and filterability, are the same as for SMS . According to reports, this new ultra-high-strength melt-blown material is 10 times more powerful than conventional melt-blown materials , and has lower production costs, smaller grammage, and better performance.
Celanese of the United States introduced a polyphenylene sulfide resin for meltblown nonwovens - Fortron PPS 0203HS . It is said that this raw material can be processed into a non-woven fabric on a standard meltblown apparatus that normally uses PP raw materials, but the melting temperature of the melt needs to be in the range of 300 to 320 °C, and the temperature during spinning needs to be increased.
According Celanese Company, PPS fineness such meltblown fibers mostly in 2 ~ 4 ì m, from fine to coarse wide distribution. Because PPS has the characteristics of high temperature resistance and can be used as a filter material in harsh environments, it has great development prospects and can be used for flue gas filtration in cement plants and steel plants.
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