Polyester

Background

Anhydrous Sodium Saccharin CAS 128-44-9, air, water, and petroleum. Developed in a 20th-century laboratory,Feed Grade Sodium Saccharin. In this reaction,Insoluble Saccharin CAS 81-07-2.Sodium Saccharin for Food and Beverage.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Soda ash, computer and recording tapes, and electrical insulation.Musk Xylene With Crystal Powder. It does not absorb moisture, but does absorb oil;100% Natural Musk Ketone Powder-, soil-, and fire-Musk ketone CAS 81-14-1. Its low absorbency also makes it naturally resistant to stains.Light Magnesium Oxide CAS 1309-48-4,Caustic Soda.Caustic Soda CAS 1310-73-2, and not damaged by mildew.Sodium Hydrosulphite, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Calcium lignosulphonate-based E.I. du Pont de Nemours and Co.Calcium lignosulphonate CAS 8061-52-7. This early research, headed by W.H. Carothers,Choline Chloride Corn Cob, 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,Calcium Gluconate CAS 299-28-5. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Ferrous Gluconate CAS 299-29-6,Sodium Alginate CAS 9005-38-3. 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.Xanthan Gum CAS 11138-66-2, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Food Thickener.

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,Aspartame CAS 22839-47-0. In this process, ethylene is the polymer, the chemical building block of polyester,Lactose powder CAS 63-42-3.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Sucralose CAS 56038-13-2. The four basic forms are filament,Maltitol CAS 585-88-6, tow, and fiberfill. In the filament form,Food Sweetener, producing smooth-Potassium Sorbate CAS 24634-61-5.Food Preservatives, filaments are cut to short,Ethyl Vanillin CAS 121-32-4.Food Flavoring Agents. 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.Food Additives.

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-standard ball bearing,ball screw bearings, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,linear guide module. 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.Cable Drag Chain, which are usually round,Laser Cutting Machine. The number of holes in the spinneret determines the size of the yarn,Cutting Machine.
• 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,1325 Cutting Machine For Sales. 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,CNC Machine.
• Cable Drag Chain,Linear Bearing Lm8uu. Also,Lme 30 uu Linear Bearing,Linear Bearing 20x28x30.

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 Bearing 60mm

Linear Bearing For 8mm 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,1/2 Inch Linear Bearing. The rope-Linear Ball Bearing.

Drawing tow

• 1 Newly-Lmf 20 uu Linear Bearing.Linear Bearing Flange.

Crimping

• 2 Drawn tow is then fed into compression boxes,Ball Screw Linear Module, at a rate of 9-15 crimps per inch (3-6 per cm).Carbon Steel Linear Motion Shaft.

Setting

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

Cutting

• 4 Following heat setting,Linear Shaft Servo Motor. 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)16mm Linear Shaft.10mm Linear Shaft, such ascarpet,polyester filaments are cut into 6 inch (15 cm)40mm Linear Shaft.

The Future

35mm Linear Shaft,20mm Linear Shaft's fastest-growing fiber.50mm Linear Shaft. 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,SBR Linear Guide, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,SBR Linear Slider Unit. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Striaght Teeth Rack, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.