Polyester

Background

Caustic Soda, air, water, and petroleum. Developed in a 20th-century laboratory,Caustic Soda CAS 1310-73-2. In this reaction,Sodium Hydrosulphite.Calcium lignosulphonate.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Calcium lignosulphonate CAS 8061-52-7, computer and recording tapes, and electrical insulation.Choline Chloride Corn Cob. It does not absorb moisture, but does absorb oil;Calcium Gluconate CAS 299-28-5-, soil-, and fire-Ferrous Gluconate CAS 299-29-6. Its low absorbency also makes it naturally resistant to stains.Sodium Alginate CAS 9005-38-3,Xanthan Gum CAS 11138-66-2.Food Thickener, and not damaged by mildew.Aspartame CAS 22839-47-0, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

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

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 Additives. In this process, ethylene is the polymer, the chemical building block of polyester,standard ball bearing.

The Manufacturing
Process

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

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-Linear Bearing Lm8uu,Lme 30 uu Linear Bearing, is extruded through a slot to form long ribbons.

Drying

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

Linear Shaft Servo Motor, 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,16mm Linear Shaft. The rope-10mm Linear Shaft.

Drawing tow

• 1 Newly-40mm Linear Shaft.35mm Linear Shaft.

Crimping

• 2 Drawn tow is then fed into compression boxes,20mm Linear Shaft, at a rate of 9-15 crimps per inch (3-6 per cm).50mm Linear Shaft.

Setting

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

Cutting

• 4 Following heat setting,Striaght Teeth Rack. 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 Screw Bearing.Mini Linear Guides, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Mini-Rail Miniature Linear Guide.

The Future

Mgn12h Mini Linear Rail Guide,Linear Bearing Design Guide's fastest-growing fiber.Compact Linear Motion Guide Rail. 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,Linear Guide Carriage For Sale, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Cnc Linear Guide Rail. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Hgr15 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.