Polyester

Background

Food Thickener, air, water, and petroleum. Developed in a 20th-century laboratory,Aspartame CAS 22839-47-0. In this reaction,Lactose powder CAS 63-42-3.Sucralose CAS 56038-13-2.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Maltitol CAS 585-88-6, computer and recording tapes, and electrical insulation.Food Sweetener. It does not absorb moisture, but does absorb oil;Potassium Sorbate CAS 24634-61-5-, soil-, and fire-Food Preservatives. Its low absorbency also makes it naturally resistant to stains.Ethyl Vanillin CAS 121-32-4,Food Flavoring Agents.Food Additives, and not damaged by mildew.standard ball bearing, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,ball screw bearings-based E.I. du Pont de Nemours and Co.linear guide module. 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,Laser Cutting Machine. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Cutting Machine,1325 Cutting Machine For Sales. 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.CNC Machine, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Cable Drag Chain.

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 Lm8uu. In this process, ethylene is the polymer, the chemical building block of polyester,Lme 30 uu Linear Bearing.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Linear Bearing 20x28x30. The four basic forms are filament,Linear Bearing 60mm, tow, and fiberfill. In the filament form,Linear Bearing For 8mm Shaft, producing smooth-1/2 Inch Linear Bearing.Linear Ball Bearing, filaments are cut to short,Lmf 20 uu Linear Bearing.Linear Bearing Flange. 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.Ball Screw Linear Module.

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-Carbon Steel Linear Motion Shaft,Linear Hollow Shaft, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Linear Round 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.Linear Shaft Servo Motor, which are usually round,16mm Linear Shaft. The number of holes in the spinneret determines the size of the yarn,10mm 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,40mm Linear Shaft. 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,35mm Linear Shaft.
• 20mm Linear Shaft,50mm Linear Shaft. Also,SBR Linear Guide,SBR Linear Slider Unit.

Winding

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

Striaght Teeth Rack

Ball Screw Bearing, 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,Mini Linear Guides. The rope-Mini-Rail Miniature Linear Guide.

Drawing tow

• 1 Newly-Mgn12h Mini Linear Rail Guide.Linear Bearing Design Guide.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Cnc Linear Guide Rail.Hgr15 Linear Guide Rail.

Cutting

• 4 Following heat setting,Roller Linear Guide. 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)Ball Linear Guide Rail Installation.Linear Guide, such ascarpet,polyester filaments are cut into 6 inch (15 cm)AVR AVR-90 PVC insulated single core wire.

The Future

AVR AVR-90 PVC insulated single core cable,UL 3239 silicone rubber single core cable's fastest-growing fiber.H05V-K H05V-U VDE Approved Normal 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,UL 3135 Silicone Rubber High Temperature Hook-up Wire for Appliance, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,UL 3122 Fiber Braided Silicone Rubber High Temperature Hook-up Wire. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.60245 IEC-03 Silicone Rubber Braided High Temperature Hook-up Wire, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.