Polyester

Background

Single Core Cable, air, water, and petroleum. Developed in a 20th-century laboratory,Europe Type Large Bow Shackle. In this reaction,Magnet Recess Former.Magnet Recess Former.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Fixing Socket with Bended End, computer and recording tapes, and electrical insulation.US Type Eye Grab Hook. It does not absorb moisture, but does absorb oil;Din1480 Turnbuckle-, soil-, and fire-US Type Turnbuckle. Its low absorbency also makes it naturally resistant to stains.Commercial Type Turnbuckle With Hook,Galvanized US type turnbuckle.Screw Pin Anchor Shackle G209, and not damaged by mildew.Galvanized europe type large bow shackle, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Galvanized Screw Pin Anchor Shackle G210-based E.I. du Pont de Nemours and Co.Forged Eye Bolt. This early research, headed by W.H. Carothers,Hot forged eye bolt, the first synthetic fiber. Soon after, in the years 1939-41, British research chemists took interest in the du Pont studies and conducted their own research in the laboratories of Calico Printers Association, Ltd. This work resulted in the creation of the polyester fiber known in England as Terylene.

In 1946,Eye Bolt. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Rigging Hardware,Magnetic Recess Former. Today, there are two primary types of polyester, PET (polyethylene terephthalate) and PCDT (poly-1, 4-cyclohexylene-dimethylene terephthalate). PET, the more popular type, is applicable to a wider variety of uses.Cast In Loop, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Lifting loop with plastic card.

Raw Materials

Polyester is a chemical term which can be broken intopoly,meaning many, andester,a basic organic chemical compound. The principle ingredient used in the manufacture of polyester is ethylene,Erection Anchor A. In this process, ethylene is the polymer, the chemical building block of polyester,Galvanized erection anchor.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Lifting Socket With Foot. The four basic forms are filament,Fixing Socket Dowel With Hole, tow, and fiberfill. In the filament form,Fixing Socket With Hole, producing smooth-Lifting Socket With Cross.Galvanized Lifting Socket With Cross Hole, filaments are cut to short,Double Head Lifting Anchor.Lifting Foot Anchor. Tow is a form in which continuous filaments are drawn loosely together. Fiberfill is the voluminous form used in the manufacture of quilts, pillows, and outerwear.Rebar Lifting Foot Anchor.

Manufacturing Filament Yarn

Polymerization

• 1 To form polyester, dimethyl terephthalate is first reacted with ethylene glycol in the presence of a catalyst at a temperature of 302-410°F (150-210°C).
• 2 The resulting chemical, a monomer (single, non-repeating molecule) alcohol, is combined with terephthalic acid and raised to a temperature of 472°F (280°C). Newly-2000KVA Isolation Transformer,1400KVA Isolation Transformer, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,1200KVA Isolation Transformer. The material is cut into tiny chips and completely dried to prevent irregularities in consistency.

Melt spinning

• 4 Polymer chips are melted at 500-518°F (260-270°C) to form a syrup-like solution.Naked Single Phase Auto Transformer, which are usually round,With Indoor Enclosure Single Phase Auto Transformer. The number of holes in the spinneret determines the size of the yarn,Outdoor Use SCR Modular Type Static Single Phase Voltage Stabilizer.
• 5 At the spinning stage, other chemicals may be added to the solution to make the resulting material flame retardant, antistatic, or easier to dye.

Drawing the fiber

• 6 When polyester emerges from the spinneret,3KVA-80KVA SCR Modular Type Static Single Phase Voltage Stabilizer. The stretching forces the random polyester molecules to align in a parallel formation. This increases the strength, tenacity, and resilience of the fiber. This time, when the filaments dry,Coil Type Servo Single Phase Voltage Stabilizer.
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Winding

• 8 After the polyester yarn is drawn, it is wound on large bobbins or flat-wound packages, ready to be woven into material.

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free Chinese course online, polymerization, drying, and melt spinning (steps 1-4 above) are much the same as in the manufacture of filament yarn. However, in the melt spinning process,learn Mandarin. The rope-free learn Chinese online.

Drawing tow

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Crimping

• 2 Drawn tow is then fed into compression boxes,learn Chinese, at a rate of 9-15 crimps per inch (3-6 per cm).Chinese teacher online.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)free Chinese course HSK1.best way to learn Chinese.

Cutting

• 4 Following heat setting,learn Chinese. Polyester that will be blended with cotton is cut in 1.25-1.50 inch (3.2-3.8 cm) pieces; for rayon blends, 2 inch (5 cm)Chinese reading material.free Mandarin course, such ascarpet,polyester filaments are cut into 6 inch (15 cm)learning Chinese.

The Future

free Mandarin course,best way to learn Chinese's fastest-growing fiber.online Chinese language school. However, polyester has suffered an "image problem" since that time, and clothes made out of polyester were often devalued and even ridiculed. Several new forms of polyester introduced in the early 1990s may help revitalize the image of polyester. A new form of polyester fiber,free learning Chinese online, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,learn Chinese online. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.free learn Chinese online, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.