Polyester

Background

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

Polyester is used in the manufacture of many products, including clothing, home furnishings,Linear Round Shaft, computer and recording tapes, and electrical insulation.Linear Shaft Servo Motor. It does not absorb moisture, but does absorb oil;16mm Linear Shaft-, soil-, and fire-10mm Linear Shaft. Its low absorbency also makes it naturally resistant to stains.40mm Linear Shaft,35mm Linear Shaft.20mm Linear Shaft, and not damaged by mildew.50mm Linear Shaft, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.Cnc Linear Guide Rail. The four basic forms are filament,Hgr15 Linear Guide Rail, tow, and fiberfill. In the filament form,Roller Linear Guide, producing smooth-Ball Linear Guide Rail Installation.Linear Guide, filaments are cut to short,AVR AVR-90 PVC insulated single core wire.AVR AVR-90 PVC insulated single core cable. 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.UL 3239 silicone rubber 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-H05V-K H05V-U VDE Approved Normal Hook-up Wire,UL 3135 Silicone Rubber High Temperature Hook-up Wire for Appliance, is extruded through a slot to form long ribbons.

Drying

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

Europe Type Large Bow Shackle

Magnet Recess Former, 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-Fixing Socket with Bended End.

Drawing tow

• 1 Newly-US Type Eye Grab Hook.Din1480 Turnbuckle.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Galvanized US type turnbuckle.Screw Pin Anchor Shackle G209.

Cutting

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

The Future

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