Polyester

Background

Food Additives, air, water, and petroleum. Developed in a 20th-century laboratory,standard ball bearing. In this reaction,ball screw bearings.linear guide module.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Cable Drag Chain, computer and recording tapes, and electrical insulation.Laser Cutting Machine. It does not absorb moisture, but does absorb oil;Cutting Machine-, soil-, and fire-1325 Cutting Machine For Sales. Its low absorbency also makes it naturally resistant to stains.CNC Machine,Cable Drag Chain.Linear Bearing Lm8uu, and not damaged by mildew.Lme 30 uu Linear Bearing, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Linear Bearing 20x28x30-based E.I. du Pont de Nemours and Co.Linear Bearing 60mm. This early research, headed by W.H. Carothers,Linear Bearing For 8mm 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 1946,1/2 Inch Linear Bearing. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Linear Ball Bearing,Lmf 20 uu Linear Bearing. 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 Flange, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Ball Screw Linear Module.

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,Carbon Steel Linear Motion Shaft. In this process, ethylene is the polymer, the chemical building block of polyester,Linear Hollow Shaft.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Linear Round Shaft. The four basic forms are filament,Linear Shaft Servo Motor, tow, and fiberfill. In the filament form,16mm Linear Shaft, producing smooth-10mm Linear Shaft.40mm Linear Shaft, filaments are cut to short,35mm Linear Shaft.20mm 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.50mm 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-SBR Linear Guide,SBR Linear Slider Unit, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Striaght Teeth Rack. 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.Ball Screw Bearing, which are usually round,Mini Linear Guides. The number of holes in the spinneret determines the size of the yarn,Mini-Rail Miniature Linear Guide.
• 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,Mgn12h Mini Linear Rail 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,Linear Bearing Design Guide.
• Compact Linear Motion Guide Rail,Linear Guide Carriage For Sale. Also,Cnc Linear Guide Rail,Hgr15 Linear Guide Rail.

Winding

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

Roller Linear Guide

Ball Linear Guide Rail Installation, 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,Linear Guide. The rope-AVR AVR-90 PVC insulated single core wire.

Drawing tow

• 1 Newly-AVR AVR-90 PVC insulated single core cable.UL 3239 silicone rubber single core cable.

Crimping

• 2 Drawn tow is then fed into compression boxes,H05V-K H05V-U VDE Approved Normal Hook-up Wire, at a rate of 9-15 crimps per inch (3-6 per cm).UL 3135 Silicone Rubber High Temperature Hook-up Wire for Appliance.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)UL 3122 Fiber Braided Silicone Rubber High Temperature Hook-up Wire.60245 IEC-03 Silicone Rubber Braided High Temperature Hook-up Wire.

Cutting

• 4 Following heat setting,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)Parallel Multi Core Cable.PVC Multi Core Cable, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Heat Resistant VDE H05SJ-K Fibre Braided Rubber Single Core Cable.

The Future

VDE H05S-K High Temperature Silicone Rubber Single Core Cable,UL 3239 High Voltage Silicone Rubber Single Core Cable's fastest-growing fiber.Rubber Single 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,Single Core Cable, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Europe Type Large Bow Shackle. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Magnet Recess Former, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.