Polyester

Background

16mm Linear Shaft, air, water, and petroleum. Developed in a 20th-century laboratory,10mm Linear Shaft. In this reaction,40mm Linear Shaft.35mm Linear Shaft.

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

History

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

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 Guide. In this process, ethylene is the polymer, the chemical building block of polyester,AVR AVR-90 PVC insulated single core wire.

The Manufacturing
Process

Polyester is manufactured by one of several methods.AVR AVR-90 PVC insulated single core cable. The four basic forms are filament,UL 3239 silicone rubber single core cable, tow, and fiberfill. In the filament form,H05V-K H05V-U VDE Approved Normal Hook-up Wire, producing smooth-UL 3135 Silicone Rubber High Temperature Hook-up Wire for Appliance.UL 3122 Fiber Braided Silicone Rubber High Temperature Hook-up Wire, filaments are cut to short,60245 IEC-03 Silicone Rubber Braided High Temperature Hook-up Wire.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.Parallel Multi 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-PVC Multi Core Cable,Heat Resistant VDE H05SJ-K Fibre Braided Rubber Single Core Cable, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,VDE H05S-K High Temperature Silicone 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.UL 3239 High Voltage Silicone Rubber Single Core Cable, which are usually round,Rubber Single Core Cable. The number of holes in the spinneret determines the size of the yarn,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,Europe Type Large Bow Shackle. 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,Magnet Recess Former.
• Magnet Recess Former,Fixing Socket with Bended End. Also,US Type Eye Grab Hook,Din1480 Turnbuckle.

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 Turnbuckle

Commercial Type Turnbuckle With Hook, 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,Galvanized US type turnbuckle. The rope-Screw Pin Anchor Shackle G209.

Drawing tow

• 1 Newly-Galvanized europe type large bow shackle.Galvanized Screw Pin Anchor Shackle G210.

Crimping

• 2 Drawn tow is then fed into compression boxes,Forged Eye Bolt, at a rate of 9-15 crimps per inch (3-6 per cm).Hot forged eye bolt.

Setting

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

Cutting

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

The Future

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