Polyester

Background

Sodium Hydrosulphite, air, water, and petroleum. Developed in a 20th-century laboratory,Calcium lignosulphonate. In this reaction,Calcium lignosulphonate CAS 8061-52-7.Choline Chloride Corn Cob.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Calcium Gluconate CAS 299-28-5, computer and recording tapes, and electrical insulation.Ferrous Gluconate CAS 299-29-6. It does not absorb moisture, but does absorb oil;Sodium Alginate CAS 9005-38-3-, soil-, and fire-Xanthan Gum CAS 11138-66-2. Its low absorbency also makes it naturally resistant to stains.Food Thickener,Aspartame CAS 22839-47-0.Lactose powder CAS 63-42-3, and not damaged by mildew.Sucralose CAS 56038-13-2, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

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

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,ball screw bearings. In this process, ethylene is the polymer, the chemical building block of polyester,linear guide module.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Cable Drag Chain. The four basic forms are filament,Laser Cutting Machine, tow, and fiberfill. In the filament form,Cutting Machine, producing smooth-1325 Cutting Machine For Sales.CNC Machine, filaments are cut to short,Cable Drag Chain.Linear Bearing Lm8uu. 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.Lme 30 uu Linear Bearing.

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 20x28x30,Linear Bearing 60mm, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

16mm Linear Shaft

10mm Linear 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,40mm Linear Shaft. The rope-35mm Linear Shaft.

Drawing tow

• 1 Newly-20mm Linear Shaft.50mm Linear Shaft.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Striaght Teeth Rack.Ball Screw Bearing.

Cutting

• 4 Following heat setting,Mini Linear Guides. 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)Mini-Rail Miniature Linear Guide.Mgn12h Mini Linear Rail Guide, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Linear Bearing Design Guide.

The Future

Compact Linear Motion Guide Rail,Linear Guide Carriage For Sale's fastest-growing fiber.Cnc Linear 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,Hgr15 Linear Guide Rail, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Roller Linear Guide. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Ball Linear Guide Rail Installation, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.