Polyester

Background

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

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

History

In 1926,Lmf 20 uu Linear Bearing-based E.I. du Pont de Nemours and Co.Linear Bearing Flange. This early research, headed by W.H. Carothers,Ball Screw Linear Module, 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,Carbon Steel Linear Motion Shaft. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Linear Hollow Shaft,Linear Round 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.Linear Shaft Servo Motor, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.16mm 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,10mm Linear Shaft. In this process, ethylene is the polymer, the chemical building block of polyester,40mm Linear Shaft.

The Manufacturing
Process

Polyester is manufactured by one of several methods.35mm Linear Shaft. The four basic forms are filament,20mm Linear Shaft, tow, and fiberfill. In the filament form,50mm Linear Shaft, producing smooth-SBR Linear Guide.SBR Linear Slider Unit, filaments are cut to short,Striaght Teeth Rack.Ball Screw Bearing. 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 Linear Guides.

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-Mini-Rail Miniature Linear Guide,Mgn12h Mini Linear Rail Guide, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Linear Bearing Design Guide. 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.Compact Linear Motion Guide Rail, which are usually round,Linear Guide Carriage For Sale. The number of holes in the spinneret determines the size of the yarn,Cnc 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,Hgr15 Linear Guide Rail. 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,Roller Linear Guide.
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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 3239 silicone rubber single core cable

H05V-K H05V-U VDE Approved Normal 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,UL 3135 Silicone Rubber High Temperature Hook-up Wire for Appliance. The rope-UL 3122 Fiber Braided Silicone Rubber High Temperature Hook-up Wire.

Drawing tow

• 1 Newly-60245 IEC-03 Silicone Rubber Braided High Temperature Hook-up Wire.Hook-up Wire.

Crimping

• 2 Drawn tow is then fed into compression boxes,Parallel Multi Core Cable, at a rate of 9-15 crimps per inch (3-6 per cm).PVC Multi Core Cable.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Heat Resistant VDE H05SJ-K Fibre Braided Rubber Single Core Cable.VDE H05S-K High Temperature Silicone Rubber Single Core Cable.

Cutting

• 4 Following heat setting,UL 3239 High Voltage Silicone 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)Rubber Single Core Cable.Single Core Cable, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Europe Type Large Bow Shackle.

The Future

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