Polyester

Background

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

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

History

In 1926,20mm Linear Shaft-based E.I. du Pont de Nemours and Co.50mm Linear Shaft. This early research, headed by W.H. Carothers,SBR Linear Guide, 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 Slider Unit. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Striaght Teeth Rack,Ball Screw Bearing. 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 Linear Guides, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Mini-Rail Miniature Linear 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,Mgn12h Mini Linear Rail Guide. In this process, ethylene is the polymer, the chemical building block of polyester,Linear Bearing Design Guide.

The Manufacturing
Process

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

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 cable,UL 3239 silicone rubber single core cable, is extruded through a slot to form long ribbons.

Drying

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

Rubber Single Core Cable

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

Drawing tow

• 1 Newly-Magnet Recess Former.Fixing Socket with Bended End.

Crimping

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

Setting

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

Cutting

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

The Future

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