Polyester

Background

Linear Bearing 60mm, air, water, and petroleum. Developed in a 20th-century laboratory,Linear Bearing For 8mm Shaft. In this reaction,1/2 Inch Linear Bearing.Linear Ball Bearing.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Lmf 20 uu Linear Bearing, computer and recording tapes, and electrical insulation.Linear Bearing Flange. It does not absorb moisture, but does absorb oil;Ball Screw Linear Module-, soil-, and fire-Carbon Steel Linear Motion Shaft. Its low absorbency also makes it naturally resistant to stains.Linear Hollow Shaft,Linear Round Shaft.Linear Shaft Servo Motor, and not damaged by mildew.16mm Linear Shaft, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

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

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,Ball Screw Bearing. In this process, ethylene is the polymer, the chemical building block of polyester,Mini Linear Guides.

The Manufacturing
Process

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

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-Ball Linear Guide Rail Installation,Linear Guide, is extruded through a slot to form long ribbons.

Drying

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

Heat Resistant VDE H05SJ-K Fibre Braided Rubber Single Core Cable

VDE H05S-K High Temperature 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,UL 3239 High Voltage Silicone Rubber Single Core Cable. The rope-Rubber Single Core Cable.

Drawing tow

• 1 Newly-Single Core Cable.Europe Type Large Bow Shackle.

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).Magnet Recess Former.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Fixing Socket with Bended End.US Type Eye Grab Hook.

Cutting

• 4 Following heat setting,Din1480 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)US Type Turnbuckle.Commercial Type Turnbuckle With Hook, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Galvanized US type turnbuckle.

The Future

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