Polyester

Background

Linear Shaft Servo Motor, air, water, and petroleum. Developed in a 20th-century laboratory,16mm Linear Shaft. In this reaction,10mm Linear Shaft.40mm Linear Shaft.

Polyester is used in the manufacture of many products, including clothing, home furnishings,35mm Linear Shaft, computer and recording tapes, and electrical insulation.20mm Linear Shaft. It does not absorb moisture, but does absorb oil;50mm Linear Shaft-, soil-, and fire-SBR Linear Guide. Its low absorbency also makes it naturally resistant to stains.SBR Linear Slider Unit,Striaght Teeth Rack.Ball Screw Bearing, and not damaged by mildew.Mini Linear Guides, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Mini-Rail Miniature Linear Guide-based E.I. du Pont de Nemours and Co.Mgn12h Mini Linear Rail Guide. This early research, headed by W.H. Carothers,Linear Bearing Design 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,Compact Linear Motion Guide Rail. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Linear Guide Carriage For Sale,Cnc Linear Guide Rail. 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.Hgr15 Linear Guide Rail, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Roller 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,Ball Linear Guide Rail Installation. In this process, ethylene is the polymer, the chemical building block of polyester,Linear Guide.

The Manufacturing
Process

Polyester is manufactured by one of several methods.AVR AVR-90 PVC insulated single core wire. The four basic forms are filament,AVR AVR-90 PVC insulated single core cable, tow, and fiberfill. In the filament form,UL 3239 silicone rubber single core cable, producing smooth-H05V-K H05V-U VDE Approved Normal Hook-up Wire.UL 3135 Silicone Rubber High Temperature Hook-up Wire for Appliance, filaments are cut to short,UL 3122 Fiber Braided Silicone Rubber High Temperature Hook-up Wire.60245 IEC-03 Silicone Rubber Braided High Temperature Hook-up 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.Hook-up 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-Parallel Multi Core Cable,PVC Multi Core Cable, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Heat Resistant VDE H05SJ-K Fibre Braided 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.VDE H05S-K High Temperature Silicone Rubber Single Core Cable, which are usually round,UL 3239 High Voltage Silicone Rubber Single Core Cable. The number of holes in the spinneret determines the size of the yarn,Rubber Single 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,Single 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,Europe Type Large Bow Shackle.
• Magnet Recess Former,Magnet Recess Former. Also,Fixing Socket with Bended End,US Type Eye Grab Hook.

Winding

• 8 After the polyester yarn is drawn, it is wound on large bobbins or flat-wound packages, ready to be woven into material.

Din1480 Turnbuckle

US Type Turnbuckle, 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,Commercial Type Turnbuckle With Hook. The rope-Galvanized US type turnbuckle.

Drawing tow

• 1 Newly-Screw Pin Anchor Shackle G209.Galvanized europe type large bow shackle.

Crimping

• 2 Drawn tow is then fed into compression boxes,Galvanized Screw Pin Anchor Shackle G210, at a rate of 9-15 crimps per inch (3-6 per cm).Forged Eye Bolt.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Hot forged eye bolt.Eye Bolt.

Cutting

• 4 Following heat setting,Rigging Hardware. 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)Magnetic Recess Former.Cast In Loop, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Lifting loop with plastic card.

The Future

Erection Anchor A,Galvanized erection anchor's fastest-growing fiber.Lifting Socket With Foot. 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,Fixing Socket Dowel With Hole, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Fixing Socket With Hole. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Lifting Socket With Cross, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.