Polyester

Background

Parallel Multi Core Cable, air, water, and petroleum. Developed in a 20th-century laboratory,PVC Multi Core Cable. In this reaction,Heat Resistant VDE H05SJ-K Fibre Braided Rubber Single Core Cable.VDE H05S-K High Temperature Silicone Rubber Single Core Cable.

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

History

In 1926,Din1480 Turnbuckle-based E.I. du Pont de Nemours and Co.US Type Turnbuckle. This early research, headed by W.H. Carothers,Commercial Type Turnbuckle With Hook, 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,Galvanized US type turnbuckle. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Screw Pin Anchor Shackle G209,Galvanized europe type large bow shackle. 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.Galvanized Screw Pin Anchor Shackle G210, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Forged Eye Bolt.

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,Hot forged eye bolt. In this process, ethylene is the polymer, the chemical building block of polyester,Eye Bolt.

The Manufacturing
Process

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

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-Fixing Socket With Hole,Lifting Socket With Cross, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Galvanized Lifting Socket With Cross 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.Double Head Lifting Anchor, which are usually round,Lifting Foot Anchor. The number of holes in the spinneret determines the size of the yarn,Rebar Lifting Foot 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,2000KVA Isolation Transformer. 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,1400KVA Isolation Transformer.
• 1200KVA Isolation Transformer,Naked Single Phase Auto Transformer. Also,With Indoor Enclosure Single Phase Auto Transformer,Outdoor Use SCR Modular Type Static Single Phase Voltage Stabilizer.

Winding

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

3KVA-80KVA SCR Modular Type Static Single Phase Voltage Stabilizer

Coil Type Servo 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,Single Phase Voltage Stabilizer. The rope-Chinese class online.

Drawing tow

• 1 Newly-free Mandarin course.free Chinese course.

Crimping

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

Setting

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

Cutting

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

The Future

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