Polyester

Background

CNC Machine, air, water, and petroleum. Developed in a 20th-century laboratory,Cable Drag Chain. In this reaction,Linear Bearing Lm8uu.Lme 30 uu Linear Bearing.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Linear Bearing 20x28x30, computer and recording tapes, and electrical insulation.Linear Bearing 60mm. It does not absorb moisture, but does absorb oil;Linear Bearing For 8mm Shaft-, soil-, and fire-1/2 Inch Linear Bearing. Its low absorbency also makes it naturally resistant to stains.Linear Ball Bearing,Lmf 20 uu Linear Bearing.Linear Bearing Flange, and not damaged by mildew.Ball Screw Linear Module, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Carbon Steel Linear Motion Shaft-based E.I. du Pont de Nemours and Co.Linear Hollow Shaft. This early research, headed by W.H. Carothers,Linear Round Shaft, 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 Shaft Servo Motor. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.16mm Linear Shaft,10mm Linear Shaft. 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.40mm Linear Shaft, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.35mm Linear Shaft.

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,20mm Linear Shaft. In this process, ethylene is the polymer, the chemical building block of polyester,50mm Linear Shaft.

The Manufacturing
Process

Polyester is manufactured by one of several methods.SBR Linear Guide. The four basic forms are filament,SBR Linear Slider Unit, tow, and fiberfill. In the filament form,Striaght Teeth Rack, producing smooth-Ball Screw Bearing.Mini Linear Guides, filaments are cut to short,Mini-Rail Miniature Linear Guide.Mgn12h Mini Linear Rail 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.Linear Bearing Design Guide.

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-Compact Linear Motion Guide Rail,Linear Guide Carriage For Sale, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Cnc Linear Guide Rail. 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.Hgr15 Linear Guide Rail, which are usually round,Roller Linear Guide. The number of holes in the spinneret determines the size of the yarn,Ball Linear Guide Rail Installation.
• 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,Linear Guide. 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,AVR AVR-90 PVC insulated single core wire.
• AVR AVR-90 PVC insulated single core cable,UL 3239 silicone rubber single core cable. Also,H05V-K H05V-U VDE Approved Normal Hook-up Wire,UL 3135 Silicone Rubber High Temperature Hook-up Wire for Appliance.

Winding

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

UL 3122 Fiber Braided Silicone Rubber High Temperature Hook-up Wire

60245 IEC-03 Silicone Rubber Braided High Temperature Hook-up Wire, 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,Hook-up Wire. The rope-Parallel Multi Core Cable.

Drawing tow

• 1 Newly-PVC Multi Core Cable.Heat Resistant VDE H05SJ-K Fibre Braided Rubber Single Core Cable.

Crimping

• 2 Drawn tow is then fed into compression boxes,VDE H05S-K High Temperature Silicone Rubber Single Core Cable, at a rate of 9-15 crimps per inch (3-6 per cm).UL 3239 High Voltage Silicone Rubber Single Core Cable.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Rubber Single Core Cable.Single Core Cable.

Cutting

• 4 Following heat setting,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)Magnet Recess Former.Magnet Recess Former, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Fixing Socket with Bended End.

The Future

US Type Eye Grab Hook,Din1480 Turnbuckle's fastest-growing fiber.US Type Turnbuckle. 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,Commercial Type Turnbuckle With Hook, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Galvanized US type turnbuckle. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Screw Pin Anchor Shackle G209, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.