Polyester

Background

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

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

History

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

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,Roller Linear Guide. In this process, ethylene is the polymer, the chemical building block of polyester,Ball Linear Guide Rail Installation.

The Manufacturing
Process

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

Drying

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

Winding

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

US Type Eye Grab Hook

Din1480 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,US Type Turnbuckle. The rope-Commercial Type Turnbuckle With Hook.

Drawing tow

• 1 Newly-Galvanized US type turnbuckle.Screw Pin Anchor Shackle G209.

Crimping

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

Setting

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

Cutting

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

The Future

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