Polyester

Background

Lmf 20 uu Linear Bearing, air, water, and petroleum. Developed in a 20th-century laboratory,Linear Bearing Flange. In this reaction,Ball Screw Linear Module.Carbon Steel Linear Motion Shaft.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Linear Hollow Shaft, computer and recording tapes, and electrical insulation.Linear Round Shaft. It does not absorb moisture, but does absorb oil;Linear Shaft Servo Motor-, soil-, and fire-16mm Linear Shaft. Its low absorbency also makes it naturally resistant to stains.10mm Linear Shaft,40mm Linear Shaft.35mm Linear Shaft, and not damaged by mildew.20mm Linear Shaft, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,50mm Linear Shaft-based E.I. du Pont de Nemours and Co.SBR Linear Guide. This early research, headed by W.H. Carothers,SBR Linear Slider Unit, 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,Striaght Teeth Rack. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Ball Screw Bearing,Mini Linear Guides. 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.Mini-Rail Miniature Linear Guide, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Mgn12h Mini Linear Rail Guide.

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,Linear Bearing Design Guide. In this process, ethylene is the polymer, the chemical building block of polyester,Compact Linear Motion Guide Rail.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Linear Guide Carriage For Sale. The four basic forms are filament,Cnc Linear Guide Rail, tow, and fiberfill. In the filament form,Hgr15 Linear Guide Rail, producing smooth-Roller Linear Guide.Ball Linear Guide Rail Installation, filaments are cut to short,Linear Guide.AVR AVR-90 PVC insulated single core wire. 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.AVR AVR-90 PVC insulated single core cable.

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-UL 3239 silicone rubber single core cable,H05V-K H05V-U VDE Approved Normal Hook-up Wire, is extruded through a slot to form long ribbons.

Drying

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

Single Core Cable

Europe Type Large Bow Shackle, 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,Magnet Recess Former. The rope-Magnet Recess Former.

Drawing tow

• 1 Newly-Fixing Socket with Bended End.US Type Eye Grab Hook.

Crimping

• 2 Drawn tow is then fed into compression boxes,Din1480 Turnbuckle, at a rate of 9-15 crimps per inch (3-6 per cm).US Type Turnbuckle.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Commercial Type Turnbuckle With Hook.Galvanized US type turnbuckle.

Cutting

• 4 Following heat setting,Screw Pin Anchor Shackle G209. 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 europe type large bow shackle.Galvanized Screw Pin Anchor Shackle G210, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Forged Eye Bolt.

The Future

Hot forged eye bolt,Eye Bolt's fastest-growing fiber.Rigging Hardware. 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,Magnetic Recess Former, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Cast In Loop. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Lifting loop with plastic card, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.