Polyester

Background

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

Polyester is used in the manufacture of many products, including clothing, home furnishings,Ball Screw Linear Module, computer and recording tapes, and electrical insulation.Carbon Steel Linear Motion Shaft. It does not absorb moisture, but does absorb oil;Linear Hollow Shaft-, soil-, and fire-Linear Round Shaft. Its low absorbency also makes it naturally resistant to stains.Linear Shaft Servo Motor,16mm Linear Shaft.10mm Linear Shaft, and not damaged by mildew.40mm Linear Shaft, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

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

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-Rail Miniature Linear Guide. In this process, ethylene is the polymer, the chemical building block of polyester,Mgn12h Mini Linear Rail Guide.

The Manufacturing
Process

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

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

Drying

• 3 After the polyester emerges from polymerization,UL 3239 silicone rubber 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.H05V-K H05V-U VDE Approved Normal Hook-up Wire, which are usually round,UL 3135 Silicone Rubber High Temperature Hook-up Wire for Appliance. The number of holes in the spinneret determines the size of the yarn,UL 3122 Fiber Braided Silicone Rubber High Temperature 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,60245 IEC-03 Silicone Rubber Braided 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,Hook-up Wire.
• Parallel Multi Core Cable,PVC Multi Core Cable. Also,Heat Resistant VDE H05SJ-K Fibre Braided Rubber Single Core Cable,VDE H05S-K High Temperature Silicone 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.

UL 3239 High Voltage Silicone Rubber Single Core Cable

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,Single Core Cable. The rope-Europe Type Large Bow Shackle.

Drawing tow

• 1 Newly-Magnet Recess Former.Magnet Recess Former.

Crimping

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

Setting

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

Cutting

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

The Future

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