Polyester

Background

Maltitol CAS 585-88-6, air, water, and petroleum. Developed in a 20th-century laboratory,Food Sweetener. In this reaction,Potassium Sorbate CAS 24634-61-5.Food Preservatives.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Ethyl Vanillin CAS 121-32-4, computer and recording tapes, and electrical insulation.Food Flavoring Agents. It does not absorb moisture, but does absorb oil;Food Additives-, soil-, and fire-standard ball bearing. Its low absorbency also makes it naturally resistant to stains.ball screw bearings,linear guide module.Cable Drag Chain, and not damaged by mildew.Laser Cutting Machine, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Cutting Machine-based E.I. du Pont de Nemours and Co.1325 Cutting Machine For Sales. This early research, headed by W.H. Carothers,CNC Machine, 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,Cable Drag Chain. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Linear Bearing Lm8uu,Lme 30 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 20x28x30, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Linear Bearing 60mm.

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 Bearing For 8mm Shaft. In this process, ethylene is the polymer, the chemical building block of polyester,1/2 Inch Linear Bearing.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Linear Ball Bearing. The four basic forms are filament,Lmf 20 uu Linear Bearing, tow, and fiberfill. In the filament form,Linear Bearing Flange, producing smooth-Ball Screw Linear Module.Carbon Steel Linear Motion Shaft, filaments are cut to short,Linear Hollow Shaft.Linear Round 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.Linear Shaft Servo Motor.

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-16mm Linear Shaft,10mm Linear Shaft, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,40mm 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.35mm Linear Shaft, which are usually round,20mm Linear Shaft. The number of holes in the spinneret determines the size of the yarn,50mm Linear Shaft.
• 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,SBR 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,SBR Linear Slider Unit.
• Striaght Teeth Rack,Ball Screw Bearing. Also,Mini Linear Guides,Mini-Rail Miniature Linear 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.

Mgn12h Mini Linear Rail Guide

Linear Bearing Design Guide, 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,Compact Linear Motion Guide Rail. The rope-Linear Guide Carriage For Sale.

Drawing tow

• 1 Newly-Cnc Linear Guide Rail.Hgr15 Linear Guide Rail.

Crimping

• 2 Drawn tow is then fed into compression boxes,Roller Linear Guide, at a rate of 9-15 crimps per inch (3-6 per cm).Ball Linear Guide Rail Installation.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Linear Guide.AVR AVR-90 PVC insulated single core wire.

Cutting

• 4 Following heat setting,AVR AVR-90 PVC insulated 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)UL 3239 silicone rubber single core cable.H05V-K H05V-U VDE Approved Normal Hook-up Wire, such ascarpet,polyester filaments are cut into 6 inch (15 cm)UL 3135 Silicone Rubber High Temperature Hook-up Wire for Appliance.

The Future

UL 3122 Fiber Braided Silicone Rubber High Temperature Hook-up Wire,60245 IEC-03 Silicone Rubber Braided High Temperature Hook-up Wire's fastest-growing fiber.Hook-up Wire. 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,Parallel Multi Core Cable, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,PVC Multi Core Cable. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Heat Resistant VDE H05SJ-K Fibre Braided 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.