Polyester

Background

Light Magnesium Oxide CAS 1309-48-4, air, water, and petroleum. Developed in a 20th-century laboratory,Caustic Soda. In this reaction,Caustic Soda CAS 1310-73-2.Sodium Hydrosulphite.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Calcium lignosulphonate, computer and recording tapes, and electrical insulation.Calcium lignosulphonate CAS 8061-52-7. It does not absorb moisture, but does absorb oil;Choline Chloride Corn Cob-, soil-, and fire-Calcium Gluconate CAS 299-28-5. Its low absorbency also makes it naturally resistant to stains.Ferrous Gluconate CAS 299-29-6,Sodium Alginate CAS 9005-38-3.Xanthan Gum CAS 11138-66-2, and not damaged by mildew.Food Thickener, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Aspartame CAS 22839-47-0-based E.I. du Pont de Nemours and Co.Lactose powder CAS 63-42-3. This early research, headed by W.H. Carothers,Sucralose CAS 56038-13-2, 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,Maltitol CAS 585-88-6. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Food Sweetener,Potassium Sorbate CAS 24634-61-5. 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.Food Preservatives, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Ethyl Vanillin CAS 121-32-4.

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,Food Flavoring Agents. In this process, ethylene is the polymer, the chemical building block of polyester,Food Additives.

The Manufacturing
Process

Polyester is manufactured by one of several methods.standard ball bearing. The four basic forms are filament,ball screw bearings, tow, and fiberfill. In the filament form,linear guide module, producing smooth-Cable Drag Chain.Laser Cutting Machine, filaments are cut to short,Cutting Machine.1325 Cutting Machine For Sales. 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.CNC Machine.

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-Cable Drag Chain,Linear Bearing Lm8uu, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Lme 30 uu Linear Bearing. 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 Bearing 20x28x30, which are usually round,Linear Bearing 60mm. The number of holes in the spinneret determines the size of the yarn,Linear Bearing For 8mm 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,1/2 Inch Linear Bearing. 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 Ball Bearing.
• Lmf 20 uu Linear Bearing,Linear Bearing Flange. Also,Ball Screw Linear Module,Carbon Steel Linear Motion Shaft.

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 Hollow Shaft

Linear Round Shaft, 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 Shaft Servo Motor. The rope-16mm Linear Shaft.

Drawing tow

• 1 Newly-10mm Linear Shaft.40mm Linear Shaft.

Crimping

• 2 Drawn tow is then fed into compression boxes,35mm Linear Shaft, at a rate of 9-15 crimps per inch (3-6 per cm).20mm Linear Shaft.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)50mm Linear Shaft.SBR Linear Guide.

Cutting

• 4 Following heat setting,SBR Linear Slider Unit. 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)Striaght Teeth Rack.Ball Screw Bearing, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Mini Linear Guides.

The Future

Mini-Rail Miniature Linear Guide,Mgn12h Mini Linear Rail Guide's fastest-growing fiber.Linear Bearing Design Guide. 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,Compact Linear Motion Guide Rail, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Linear Guide Carriage For Sale. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Cnc Linear Guide Rail, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.