Polyester

Background

Cutting Machine, air, water, and petroleum. Developed in a 20th-century laboratory,1325 Cutting Machine For Sales. In this reaction,CNC Machine.Cable Drag Chain.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Linear Bearing Lm8uu, computer and recording tapes, and electrical insulation.Lme 30 uu Linear Bearing. It does not absorb moisture, but does absorb oil;Linear Bearing 20x28x30-, soil-, and fire-Linear Bearing 60mm. Its low absorbency also makes it naturally resistant to stains.Linear Bearing For 8mm Shaft,1/2 Inch Linear Bearing.Linear Ball Bearing, and not damaged by mildew.Lmf 20 uu Linear Bearing, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.20mm Linear Shaft. The four basic forms are filament,50mm Linear Shaft, tow, and fiberfill. In the filament form,SBR Linear Guide, producing smooth-SBR Linear Slider Unit.Striaght Teeth Rack, filaments are cut to short,Ball Screw Bearing.Mini Linear Guides. 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.Mini-Rail Miniature Linear 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-Mgn12h Mini Linear Rail Guide,Linear Bearing Design Guide, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Compact Linear Motion 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.Linear Guide Carriage For Sale, which are usually round,Cnc Linear Guide Rail. The number of holes in the spinneret determines the size of the yarn,Hgr15 Linear Guide Rail.
• 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,Roller 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,Ball Linear Guide Rail Installation.
• Linear Guide,AVR AVR-90 PVC insulated single core wire. Also,AVR AVR-90 PVC insulated single core cable,UL 3239 silicone rubber 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.

H05V-K H05V-U VDE Approved Normal Hook-up Wire

UL 3135 Silicone Rubber High Temperature Hook-up Wire for Appliance, 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,UL 3122 Fiber Braided Silicone Rubber High Temperature Hook-up Wire. The rope-60245 IEC-03 Silicone Rubber Braided High Temperature Hook-up Wire.

Drawing tow

• 1 Newly-Hook-up Wire.Parallel Multi Core Cable.

Crimping

• 2 Drawn tow is then fed into compression boxes,PVC Multi Core Cable, at a rate of 9-15 crimps per inch (3-6 per cm).Heat Resistant VDE H05SJ-K Fibre Braided Rubber Single Core Cable.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)VDE H05S-K High Temperature Silicone Rubber Single Core Cable.UL 3239 High Voltage Silicone Rubber Single Core Cable.

Cutting

• 4 Following heat setting,Rubber Single Core Cable. 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)Single Core Cable.Europe Type Large Bow Shackle, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Magnet Recess Former.

The Future

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