Polyester

Background

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

Polyester is used in the manufacture of many products, including clothing, home furnishings,Linear Bearing 60mm, computer and recording tapes, and electrical insulation.Linear Bearing For 8mm Shaft. It does not absorb moisture, but does absorb oil;1/2 Inch Linear Bearing-, soil-, and fire-Linear Ball Bearing. Its low absorbency also makes it naturally resistant to stains.Lmf 20 uu Linear Bearing,Linear Bearing Flange.Ball Screw Linear Module, and not damaged by mildew.Carbon Steel Linear Motion Shaft, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

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

The Manufacturing
Process

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

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 Carriage For Sale,Cnc Linear Guide Rail, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Hgr15 Linear Guide Rail. 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.Roller Linear Guide, which are usually round,Ball Linear Guide Rail Installation. The number of holes in the spinneret determines the size of the yarn,Linear Guide.
• 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 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,AVR AVR-90 PVC insulated single core cable.
• UL 3239 silicone rubber single core cable,H05V-K H05V-U VDE Approved Normal Hook-up Wire. Also,UL 3135 Silicone Rubber High Temperature Hook-up Wire for Appliance,UL 3122 Fiber Braided Silicone Rubber 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.

60245 IEC-03 Silicone Rubber Braided High Temperature Hook-up Wire

Hook-up Wire, 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,Parallel Multi Core Cable. The rope-PVC Multi Core Cable.

Drawing tow

• 1 Newly-Heat Resistant VDE H05SJ-K Fibre Braided Rubber Single Core Cable.VDE H05S-K High Temperature Silicone Rubber Single Core Cable.

Crimping

• 2 Drawn tow is then fed into compression boxes,UL 3239 High Voltage Silicone Rubber Single Core Cable, at a rate of 9-15 crimps per inch (3-6 per cm).Rubber Single Core Cable.

Setting

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

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

The Future

Din1480 Turnbuckle,US Type Turnbuckle's fastest-growing fiber.Commercial Type Turnbuckle With Hook. 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,Galvanized US type turnbuckle, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Screw Pin Anchor Shackle G209. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Galvanized europe type large bow shackle, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.