Polyester

Background

Linear Bearing Lm8uu, air, water, and petroleum. Developed in a 20th-century laboratory,Lme 30 uu Linear Bearing. In this reaction,Linear Bearing 20x28x30.Linear Bearing 60mm.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Linear Bearing For 8mm Shaft, computer and recording tapes, and electrical insulation.1/2 Inch Linear Bearing. It does not absorb moisture, but does absorb oil;Linear Ball Bearing-, soil-, and fire-Lmf 20 uu Linear Bearing. Its low absorbency also makes it naturally resistant to stains.Linear Bearing Flange,Ball Screw Linear Module.Carbon Steel Linear Motion Shaft, and not damaged by mildew.Linear Hollow Shaft, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Linear Round Shaft-based E.I. du Pont de Nemours and Co.Linear Shaft Servo Motor. This early research, headed by W.H. Carothers,16mm 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 1946,10mm Linear Shaft. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.40mm Linear Shaft,35mm Linear Shaft. 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.20mm Linear Shaft, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.50mm Linear Shaft.

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,SBR Linear Guide. In this process, ethylene is the polymer, the chemical building block of polyester,SBR Linear Slider Unit.

The Manufacturing
Process

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

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-Cnc Linear Guide Rail,Hgr15 Linear Guide Rail, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Roller Linear Guide. 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.Ball Linear Guide Rail Installation, which are usually round,Linear Guide. The number of holes in the spinneret determines the size of the yarn,AVR AVR-90 PVC insulated single core wire.
• 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,AVR AVR-90 PVC insulated single core cable. 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,UL 3239 silicone rubber single core cable.
• H05V-K H05V-U VDE Approved Normal Hook-up Wire,UL 3135 Silicone Rubber High Temperature Hook-up Wire for Appliance. Also,UL 3122 Fiber Braided Silicone Rubber High Temperature Hook-up Wire,60245 IEC-03 Silicone Rubber Braided High Temperature Hook-up Wire.

Winding

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

Hook-up Wire

Parallel Multi 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,PVC Multi Core Cable. The rope-Heat Resistant VDE H05SJ-K Fibre Braided Rubber Single Core Cable.

Drawing tow

• 1 Newly-VDE H05S-K High Temperature Silicone Rubber Single Core Cable.UL 3239 High Voltage Silicone Rubber Single Core Cable.

Crimping

• 2 Drawn tow is then fed into compression boxes,Rubber Single Core Cable, at a rate of 9-15 crimps per inch (3-6 per cm).Single Core Cable.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Europe Type Large Bow Shackle.Magnet Recess Former.

Cutting

• 4 Following heat setting,Magnet Recess Former. 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)Fixing Socket with Bended End.US Type Eye Grab Hook, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Din1480 Turnbuckle.

The Future

US Type Turnbuckle,Commercial Type Turnbuckle With Hook's fastest-growing fiber.Galvanized US type turnbuckle. 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,Screw Pin Anchor Shackle G209, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Galvanized europe type large bow shackle. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Galvanized Screw Pin Anchor Shackle G210, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.