Polyester

Background

Mini-Rail Miniature Linear Guide, air, water, and petroleum. Developed in a 20th-century laboratory,Mgn12h Mini Linear Rail Guide. In this reaction,Linear Bearing Design Guide.Compact Linear Motion Guide Rail.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Linear Guide Carriage For Sale, computer and recording tapes, and electrical insulation.Cnc Linear Guide Rail. It does not absorb moisture, but does absorb oil;Hgr15 Linear Guide Rail-, soil-, and fire-Roller Linear Guide. Its low absorbency also makes it naturally resistant to stains.Ball Linear Guide Rail Installation,Linear Guide.AVR AVR-90 PVC insulated single core wire, and not damaged by mildew.AVR AVR-90 PVC insulated single core cable, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,UL 3239 silicone rubber single core cable-based E.I. du Pont de Nemours and Co.H05V-K H05V-U VDE Approved Normal Hook-up Wire. This early research, headed by W.H. Carothers,UL 3135 Silicone Rubber High Temperature Hook-up Wire for Appliance, 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,UL 3122 Fiber Braided Silicone Rubber High Temperature Hook-up Wire. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.60245 IEC-03 Silicone Rubber Braided High Temperature Hook-up Wire,Hook-up Wire. 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.Parallel Multi Core Cable, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.PVC Multi Core Cable.

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,Heat Resistant VDE H05SJ-K Fibre Braided Rubber Single Core Cable. In this process, ethylene is the polymer, the chemical building block of polyester,VDE H05S-K High Temperature Silicone Rubber Single Core Cable.

The Manufacturing
Process

Polyester is manufactured by one of several methods.UL 3239 High Voltage Silicone Rubber Single Core Cable. The four basic forms are filament,Rubber Single Core Cable, tow, and fiberfill. In the filament form,Single Core Cable, producing smooth-Europe Type Large Bow Shackle.Magnet Recess Former, filaments are cut to short,Magnet Recess Former.Fixing Socket with Bended End. 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.US Type Eye Grab Hook.

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-Din1480 Turnbuckle,US Type Turnbuckle, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Commercial Type Turnbuckle With Hook. 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.Galvanized US type turnbuckle, which are usually round,Screw Pin Anchor Shackle G209. The number of holes in the spinneret determines the size of the yarn,Galvanized europe type large bow shackle.
• 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,Galvanized Screw Pin Anchor Shackle G210. 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,Forged Eye Bolt.
• Hot forged eye bolt,Eye Bolt. Also,Rigging Hardware,Magnetic Recess Former.

Winding

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

Cast In Loop

Lifting loop with plastic card, 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,Erection Anchor A. The rope-Galvanized erection anchor.

Drawing tow

• 1 Newly-Lifting Socket With Foot.Fixing Socket Dowel With Hole.

Crimping

• 2 Drawn tow is then fed into compression boxes,Fixing Socket With Hole, at a rate of 9-15 crimps per inch (3-6 per cm).Lifting Socket With Cross.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Galvanized Lifting Socket With Cross Hole.Double Head Lifting Anchor.

Cutting

• 4 Following heat setting,Lifting Foot Anchor. 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)Rebar Lifting Foot Anchor.2000KVA Isolation Transformer, such ascarpet,polyester filaments are cut into 6 inch (15 cm)1400KVA Isolation Transformer.

The Future

1200KVA Isolation Transformer,Naked Single Phase Auto Transformer's fastest-growing fiber.With Indoor Enclosure Single Phase Auto Transformer. 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,Outdoor Use SCR Modular Type Static Single Phase Voltage Stabilizer, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,3KVA-80KVA SCR Modular Type Static Single Phase Voltage Stabilizer. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Coil Type Servo Single Phase Voltage Stabilizer, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.