Polyester

Background

SBR Linear Slider Unit, air, water, and petroleum. Developed in a 20th-century laboratory,Striaght Teeth Rack. In this reaction,Ball Screw Bearing.Mini Linear Guides.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Mini-Rail Miniature Linear Guide, computer and recording tapes, and electrical insulation.Mgn12h Mini Linear Rail Guide. It does not absorb moisture, but does absorb oil;Linear Bearing Design Guide-, soil-, and fire-Compact Linear Motion Guide Rail. Its low absorbency also makes it naturally resistant to stains.Linear Guide Carriage For Sale,Cnc Linear Guide Rail.Hgr15 Linear Guide Rail, and not damaged by mildew.Roller Linear Guide, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Ball Linear Guide Rail Installation-based E.I. du Pont de Nemours and Co.Linear Guide. This early research, headed by W.H. Carothers,AVR AVR-90 PVC insulated single core wire, 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,AVR AVR-90 PVC insulated single core cable. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.UL 3239 silicone rubber single core cable,H05V-K H05V-U VDE Approved Normal 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.UL 3135 Silicone Rubber High Temperature Hook-up Wire for Appliance, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.UL 3122 Fiber Braided Silicone Rubber High Temperature Hook-up Wire.

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,60245 IEC-03 Silicone Rubber Braided High Temperature Hook-up Wire. In this process, ethylene is the polymer, the chemical building block of polyester,Hook-up Wire.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Parallel Multi Core Cable. The four basic forms are filament,PVC Multi Core Cable, tow, and fiberfill. In the filament form,Heat Resistant VDE H05SJ-K Fibre Braided Rubber Single Core Cable, producing smooth-VDE H05S-K High Temperature Silicone Rubber Single Core Cable.UL 3239 High Voltage Silicone Rubber Single Core Cable, filaments are cut to short,Rubber Single Core Cable.Single Core Cable. 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.Europe Type Large Bow Shackle.

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-Magnet Recess Former,Magnet Recess Former, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Fixing Socket with Bended End. 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.US Type Eye Grab Hook, which are usually round,Din1480 Turnbuckle. The number of holes in the spinneret determines the size of the yarn,US Type Turnbuckle.
• 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,Commercial Type Turnbuckle With Hook. 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,Galvanized US type turnbuckle.
• Screw Pin Anchor Shackle G209,Galvanized europe type large bow shackle. Also,Galvanized Screw Pin Anchor Shackle G210,Forged Eye Bolt.

Winding

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

Hot forged eye bolt

Eye Bolt, 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,Rigging Hardware. The rope-Magnetic Recess Former.

Drawing tow

• 1 Newly-Cast In Loop.Lifting loop with plastic card.

Crimping

• 2 Drawn tow is then fed into compression boxes,Erection Anchor A, at a rate of 9-15 crimps per inch (3-6 per cm).Galvanized erection anchor.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Lifting Socket With Foot.Fixing Socket Dowel With Hole.

Cutting

• 4 Following heat setting,Fixing Socket With Hole. 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)Lifting Socket With Cross.Galvanized Lifting Socket With Cross Hole, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Double Head Lifting Anchor.

The Future

Lifting Foot Anchor,Rebar Lifting Foot Anchor's fastest-growing fiber.2000KVA Isolation 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,1400KVA Isolation Transformer, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,1200KVA Isolation Transformer. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Naked Single Phase Auto Transformer, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.