Polyester

Background

Linear Bearing For 8mm Shaft, air, water, and petroleum. Developed in a 20th-century laboratory,1/2 Inch Linear Bearing. In this reaction,Linear Ball Bearing.Lmf 20 uu Linear Bearing.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Linear Bearing Flange, computer and recording tapes, and electrical insulation.Ball Screw Linear Module. It does not absorb moisture, but does absorb oil;Carbon Steel Linear Motion Shaft-, soil-, and fire-Linear Hollow Shaft. Its low absorbency also makes it naturally resistant to stains.Linear Round Shaft,Linear Shaft Servo Motor.16mm Linear Shaft, and not damaged by mildew.10mm Linear Shaft, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,40mm Linear Shaft-based E.I. du Pont de Nemours and Co.35mm Linear Shaft. This early research, headed by W.H. Carothers,20mm Linear Shaft, 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 1946,50mm Linear Shaft. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.SBR Linear Guide,SBR Linear Slider Unit. 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.Striaght Teeth Rack, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Ball Screw Bearing.

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,Mini Linear Guides. In this process, ethylene is the polymer, the chemical building block of polyester,Mini-Rail Miniature Linear Guide.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Mgn12h Mini Linear Rail Guide. The four basic forms are filament,Linear Bearing Design Guide, tow, and fiberfill. In the filament form,Compact Linear Motion Guide Rail, producing smooth-Linear Guide Carriage For Sale.Cnc Linear Guide Rail, filaments are cut to short,Hgr15 Linear Guide Rail.Roller Linear Guide. 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.Ball Linear Guide Rail Installation.

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-Linear Guide,AVR AVR-90 PVC insulated single core wire, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,AVR AVR-90 PVC insulated single core cable. 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.UL 3239 silicone rubber single core cable, which are usually round,H05V-K H05V-U VDE Approved Normal Hook-up Wire. The number of holes in the spinneret determines the size of the yarn,UL 3135 Silicone Rubber High Temperature Hook-up Wire for Appliance.
• 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,UL 3122 Fiber Braided Silicone Rubber High Temperature Hook-up Wire. 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,60245 IEC-03 Silicone Rubber Braided High Temperature Hook-up Wire.
• Hook-up Wire,Parallel Multi Core Cable. Also,PVC Multi Core Cable,Heat Resistant VDE H05SJ-K Fibre Braided Rubber Single Core Cable.

Winding

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

VDE H05S-K High Temperature Silicone Rubber Single Core Cable

UL 3239 High Voltage Silicone Rubber Single Core Cable, 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,Rubber Single Core Cable. The rope-Single Core Cable.

Drawing tow

• 1 Newly-Europe Type Large Bow Shackle.Magnet Recess Former.

Crimping

• 2 Drawn tow is then fed into compression boxes,Magnet Recess Former, at a rate of 9-15 crimps per inch (3-6 per cm).Fixing Socket with Bended End.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)US Type Eye Grab Hook.Din1480 Turnbuckle.

Cutting

• 4 Following heat setting,US Type Turnbuckle. 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)Commercial Type Turnbuckle With Hook.Galvanized US type turnbuckle, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Screw Pin Anchor Shackle G209.

The Future

Galvanized europe type large bow shackle,Galvanized Screw Pin Anchor Shackle G210's fastest-growing fiber.Forged Eye Bolt. 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,Hot forged eye bolt, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Eye Bolt. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Rigging Hardware, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.