Polyester

Background

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

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

History

In 1926,1325 Cutting Machine For Sales-based E.I. du Pont de Nemours and Co.CNC Machine. This early research, headed by W.H. Carothers,Cable Drag Chain, 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 Bearing Lm8uu. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Lme 30 uu Linear Bearing,Linear Bearing 20x28x30. 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 60mm, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Linear Bearing For 8mm 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,1/2 Inch Linear Bearing. In this process, ethylene is the polymer, the chemical building block of polyester,Linear Ball Bearing.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Lmf 20 uu Linear Bearing. The four basic forms are filament,Linear Bearing Flange, tow, and fiberfill. In the filament form,Ball Screw Linear Module, producing smooth-Carbon Steel Linear Motion Shaft.Linear Hollow Shaft, filaments are cut to short,Linear Round Shaft.Linear Shaft Servo Motor. 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.16mm 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-10mm Linear Shaft,40mm Linear Shaft, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,35mm 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.20mm Linear Shaft, which are usually round,50mm Linear Shaft. The number of holes in the spinneret determines the size of the yarn,SBR 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,SBR Linear Slider Unit. 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,Striaght Teeth Rack.
• Ball Screw Bearing,Mini Linear Guides. Also,Mini-Rail Miniature Linear Guide,Mgn12h Mini Linear Rail 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.

Linear Bearing Design Guide

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

Drawing tow

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

Crimping

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

Setting

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

Cutting

• 4 Following heat setting,UL 3239 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)H05V-K H05V-U VDE Approved Normal Hook-up Wire.UL 3135 Silicone Rubber High Temperature Hook-up Wire for Appliance, such ascarpet,polyester filaments are cut into 6 inch (15 cm)UL 3122 Fiber Braided Silicone Rubber High Temperature Hook-up Wire.

The Future

60245 IEC-03 Silicone Rubber Braided High Temperature Hook-up Wire,Hook-up Wire's fastest-growing fiber.Parallel 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,PVC Multi Core Cable, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Heat Resistant VDE H05SJ-K Fibre Braided Rubber Single Core Cable. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.VDE H05S-K High Temperature 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.