Polyester

Background

Calcium lignosulphonate, air, water, and petroleum. Developed in a 20th-century laboratory,Calcium lignosulphonate CAS 8061-52-7. In this reaction,Choline Chloride Corn Cob.Calcium Gluconate CAS 299-28-5.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Ferrous Gluconate CAS 299-29-6, computer and recording tapes, and electrical insulation.Sodium Alginate CAS 9005-38-3. It does not absorb moisture, but does absorb oil;Xanthan Gum CAS 11138-66-2-, soil-, and fire-Food Thickener. Its low absorbency also makes it naturally resistant to stains.Aspartame CAS 22839-47-0,Lactose powder CAS 63-42-3.Sucralose CAS 56038-13-2, and not damaged by mildew.Maltitol CAS 585-88-6, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

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

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 guide module. In this process, ethylene is the polymer, the chemical building block of polyester,Cable Drag Chain.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Laser Cutting Machine. The four basic forms are filament,Cutting Machine, tow, and fiberfill. In the filament form,1325 Cutting Machine For Sales, producing smooth-CNC Machine.Cable Drag Chain, filaments are cut to short,Linear Bearing Lm8uu.Lme 30 uu Linear Bearing. 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.Linear Bearing 20x28x30.

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 60mm,Linear Bearing For 8mm Shaft, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,1/2 Inch 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 Ball Bearing, which are usually round,Lmf 20 uu Linear Bearing. The number of holes in the spinneret determines the size of the yarn,Linear Bearing Flange.
• 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,Ball Screw Linear Module. 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,Carbon Steel Linear Motion Shaft.
• Linear Hollow Shaft,Linear Round Shaft. Also,Linear Shaft Servo Motor,16mm Linear 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.

10mm Linear Shaft

40mm 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,35mm Linear Shaft. The rope-20mm Linear Shaft.

Drawing tow

• 1 Newly-50mm Linear Shaft.SBR Linear Guide.

Crimping

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

Setting

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

Cutting

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

The Future

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