Polyester Fiber Reinforced With Tension Of Fabric

PTT, PBT

It combines the elasticity and softness of nylon, the fluffiness of acrylic fiber, the dirt resistance of polyester, and its excellent dyeing properties and comfortable handle. With these excellent characteristics, PTT and PBT polyester fibers are unique in the field of chemical fiber.

PTT and PBT polyester fibers have attracted much attention due to their excellent properties and have been widely applied in various fields.

Its soft handle and strong tensile recovery are widely used in swimsuits, pajamas, underwear and women's tights to meet the requirements for fiber elasticity in these fields.

Its dyeing properties are excellent, bright colors, high color fastness, in sportswear, jacket, knitted pullover, socks products fiber stand out.

Its anti fouling ability is strong and recyclable. It is widely used in curtains, bedding mats, mosquito nets, sofa covers, carpets, tablecloths, toys, automotive interior decorations and so on. PBT polyester fiber is also known as "new carpet material".

PBT excellent mechanical properties.

PBT is a polymer made from high purity terephthalic acid (PTA) and 1,4- butanediol esterified and condensed.

The molecular structure of PBT fiber has the same aromatic ring as polyester and the longer methylene segment which is the same as nylon. Therefore, it has excellent mechanical properties of polyester and nylon's softness and friction resistance.

It can be dyed and dyed better than polyester and nylon. It can be directly dyed at ambient pressure with disperse dyes without carrier and dyed with bright color, good color fastness and good chlorine resistance.

PBT has high rigidity and excellent fluffiness and curl value.

PBT has high surface hardness and excellent shape retention under wet condition.

The main chain structure of PBT has a longer methylene segment, so its vitrification temperature and melting point are lower than that of PET. However, because PBT has strong crystallization property, its crystallization rate is 10 times faster than that of PET. Therefore, the drying process similar to that of PET slice is adopted in the production process, and the chips will not be bonded.

The critical surface tension of PBT is low, so its anti fouling ability is strong.

The young's modulus of PBT is lower than that of PET, similar to PA, so its fiber and products are soft and the fibers are easy to curl.

PBT has good durability, dimensional stability and elasticity.

PBT fiber and its products are soft, hygroscopicity, wear resistance and fiber curl. They have excellent elasticity and compression elasticity, and their elastic recovery rate is better than polyester.

Under dry and wet conditions, both of them have special elasticity, and the elasticity is not affected by the ambient temperature. The price is far lower than that of spandex fiber.

PBT fiber has good chemical resistance, light fastness and heat resistance.

Under high temperature and long time sunlight, the intensity of PBT changed little.

PTT slice monopoly is broken

As a new type of fiber, PTT fiber is made from polycondensation of benzene two formic acid (PTA) and 1,3- propylene glycol (PDO).

Because the chemical structure of PTT is different from that of PET polyester fiber, their properties are also different.

The glass pition temperature of PTT is 45~65 degrees Celsius, and the melting point of PTT is lower than that of PET, which is equivalent to that of PBT. Therefore, in terms of fiber processing, PTT has higher tolerance and is more competitive in energy saving and process control.

As early as 1941, PTT has been developed successfully, but because of its high cost of raw material PDO, high production cost, and no industrial production, it has been shelved for a long time.

Since the 90s of last century, with the successful development of the new technology of PDO production, this innovative fiber has once again entered the field of vision.

PTT in elastic bathing suits,

It has great market potential in the field of textiles, medical treatment, hygiene and other nonwovens.

In recent years, as Japan's Asahi Asahi, South Korea's SK chemistry, Italy Miroglio, France Setilia, Spain Antex and other famous companies have entered the field of PTT fiber, PTT fiber has entered an unprecedented research and development boom.

Jiangsu Sheng Hong Polytron Technologies Inc responsible person told reporters that its wholly-owned subsidiary Jiangsu Jiangsu perch Technology Development Co., Ltd. began in 2008 to research and development of polymerization technology.

At present, significant technological breakthroughs have been made, and the first 30 thousand tons / year PTT continuous polymerization device has been successfully built in China. The device was put into operation in June 2011 and was successfully driven. It has produced more than 10 thousand tons of PTT chips with independent intellectual property rights.

In view of the problems existing in the spinning process of DuPont Co's PTT polyester chip, Sheng Hong has made effective improvements in polyester synthesis technology.

The quality of the product has been improved obviously, especially in the process of suppressing the thermal degradation and thermal degradation of the spinning process.

The product has high stability of spinning and dyeing, narrow molecular weight distribution, good fluidity of melt, and the lowest viscosity of polyester chips with the same breaking strength. The quality of PTT chips reaches the level of Shell products, and the individual index is superior to Shell. The overall quality is obviously higher than that of DuPont products.

The person in charge said that the biological PDO project under construction will be put into operation in 2013. After the breakthrough of PTT polyester synthesis technology in the company, the cost of the PTT polyester product is 15000~16000 yuan / ton, which is significantly lower than the current price of DuPont Co 21500 yuan / ton.

This makes the price of PTT polyester fiber fall sharply at the same time, and greatly opens up the use field of PTT fiber. The enterprise and China's chemical fiber industry have gained great competitiveness in the field of PTT polyester fiber.

At the same time, Jiangsu Sheng Hong technology shares responsible person also said that although the company's engineering and technical personnel in the commissioning process has been carried out to improve the existing problems in engineering design, but the core problem of restricting the PTT industry chain is the synthesis of high quality PDO, these questions need further study and solution.

PTT and PBT are different in weaving.

Weaving of high quality PTT memory fabrics is usually done by air jet loom waxing and weaving.

During the weaving process, the tension fluctuation of the spindle position of the double twister is strictly controlled so as to prevent the PTT polyester fiber from stretching under the action of the processing tension.

During the course of twisting, attention should be paid to the difference of heating temperature between inner and outer layers.

During the warping process, tension should be controlled to avoid uneven tension, resulting in uneven dyeing caused by excessive stretching.

The sizing process is based on low temperature, low tension sizing, low temperature slow drying, and strict control of slurry and drying temperature.

PTT fabrics need to be pre designed to minimize the problems such as willow, weft, blister and so on, so as to ensure the smoothness of fabrics.

Wet heat finishing usually uses overflow dyeing machine to enhance soaping and wax removal to avoid dyeing.

Because the proportion of the two component fibers of different manufacturers is different from that of the components, the two component fibers should be selected and woven.

The elastic design matches the style requirement of the fabric.

In the production process, we should give full consideration to the rule of fiber organization and warp density. The fabric finishing should keep the PTT components of the two components to shrink sufficiently, and make the yarn and fabric form a bulky structure, and reduce the tension of the fabric finishing process as far as possible.

PBT polyester fiber can be produced by the original textile processing equipment. Weft elastic fabric needs wide loom.

In order to be able to use PBT fibers in warp direction, sizing requires relatively low tension to fully accommodate meridional elasticity.

It can be used as elastic yarn directly when knitting.

PBT high elastic fabric can be made by using double rib knitting method with proper stitch density and yarn count. The length and tension of coil should be optimized in weaving process.

PBT polyester fabric can be dyed with disperse dyes.

The glass pition temperature of PBT is relatively low and can be dyed at atmospheric pressure.

In order to obtain high elastic fabric, heat treatment of PBT fabric is required at the calibration temperature, and the fabric is finalized at a temperature below or equal to the preheating temperature.

When the size of the fabric is fixed, the tension applied to the fabric must be controlled.