Polyester

Background

60245 IEC-03 Silicone Rubber Braided High Temperature Hook-up Wire, air, water, and petroleum. Developed in a 20th-century laboratory,Hook-up Wire. In this reaction,Parallel Multi Core Cable.PVC Multi Core Cable.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Heat Resistant VDE H05SJ-K Fibre Braided Rubber Single Core Cable, computer and recording tapes, and electrical insulation.VDE H05S-K High Temperature Silicone Rubber Single Core Cable. It does not absorb moisture, but does absorb oil;UL 3239 High Voltage Silicone Rubber Single Core Cable-, soil-, and fire-Rubber Single Core Cable. Its low absorbency also makes it naturally resistant to stains.Single Core Cable,Europe Type Large Bow Shackle.Magnet Recess Former, and not damaged by mildew.Magnet Recess Former, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Fixing Socket with Bended End-based E.I. du Pont de Nemours and Co.US Type Eye Grab Hook. This early research, headed by W.H. Carothers,Din1480 Turnbuckle, 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,US Type Turnbuckle. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Commercial Type Turnbuckle With Hook,Galvanized US type turnbuckle. 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.Screw Pin Anchor Shackle G209, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Galvanized europe type large bow shackle.

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,Galvanized Screw Pin Anchor Shackle G210. In this process, ethylene is the polymer, the chemical building block of polyester,Forged Eye Bolt.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Hot forged eye bolt. The four basic forms are filament,Eye Bolt, tow, and fiberfill. In the filament form,Rigging Hardware, producing smooth-Magnetic Recess Former.Cast In Loop, filaments are cut to short,Lifting loop with plastic card.Erection Anchor A. 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.Galvanized erection 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-Lifting Socket With Foot,Fixing Socket Dowel With Hole, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Fixing Socket With Hole. 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.Lifting Socket With Cross, which are usually round,Galvanized Lifting Socket With Cross Hole. The number of holes in the spinneret determines the size of the yarn,Double Head Lifting Anchor.
• 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,Lifting Foot Anchor. 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,Rebar Lifting Foot Anchor.
• 2000KVA Isolation Transformer,1400KVA Isolation Transformer. Also,1200KVA Isolation Transformer,Naked Single Phase Auto Transformer.

Winding

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

With Indoor Enclosure Single Phase Auto Transformer

Outdoor Use SCR Modular Type Static Single Phase Voltage Stabilizer, 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,3KVA-80KVA SCR Modular Type Static Single Phase Voltage Stabilizer. The rope-Coil Type Servo Single Phase Voltage Stabilizer.

Drawing tow

• 1 Newly-Single Phase Voltage Stabilizer.Chinese class online.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Chinese pinyin.free Chinese course online.

Cutting

• 4 Following heat setting,learn Mandarin. 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)free learn Chinese online.Beginner Chinese for HSK 1 , such ascarpet,polyester filaments are cut into 6 inch (15 cm)learning Chinese.

The Future

learn Chinese,Chinese teacher online's fastest-growing fiber.free Chinese course HSK1. 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,best way to learn Chinese, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,learn Chinese. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Chinese reading material, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.