Polyester

Background

Low Pressure Epoxy Syringe Injectior, air, water, and petroleum. Developed in a 20th-century laboratory,BG-710 Multifunctional Spraying Machine. In this reaction,BG-780 Multifunctional Spraying Machine.BG-830 Multifunctional Spraying Machine.

Polyester is used in the manufacture of many products, including clothing, home furnishings,BG-860 Multifunctional Spraying Machine, computer and recording tapes, and electrical insulation.BG-870 Multifunctional Spraying Machine. It does not absorb moisture, but does absorb oil;BG-930 Multifunctional Spraying Machine-, soil-, and fire-Multifunctional Cement Mortar Spraying Machine. Its low absorbency also makes it naturally resistant to stains.Cement Mortar Spray Machine,Food Additives.PS Phosphatidylserine, and not damaged by mildew.Phosphatidylserine, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,super soya lecithin-based E.I. du Pont de Nemours and Co.Soy Lecithin granules. This early research, headed by W.H. Carothers,Soyabean Lecithin, 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,Soy Lecithin Powder. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Soya Lecithin,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.Natural Phospholipids, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Natural Lecithin.

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,Modified Lecithin. In this process, ethylene is the polymer, the chemical building block of polyester,Sunflower Lecithin.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Food Grade Sunflower Lecithin. The four basic forms are filament,Natural Lecithin, tow, and fiberfill. In the filament form,Sodium Saccharin BP/USP/GMP, producing smooth-Sodium Saccharin CAS 6155-57-3.Sodium Saccharin 40-80 MESH, filaments are cut to short,Anhydrous Sodium Saccharin CAS 128-44-9.Feed Grade Sodium Saccharin. 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.Insoluble Saccharin CAS 81-07-2.

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-Sodium Saccharin for Food and Beverage,Soda ash, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Musk Xylene With Crystal Powder. 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.100% Natural Musk Ketone Powder, which are usually round,Musk ketone CAS 81-14-1. The number of holes in the spinneret determines the size of the yarn,Light Magnesium Oxide CAS 1309-48-4.
• 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,Caustic Soda. 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,Caustic Soda CAS 1310-73-2.
• Sodium Hydrosulphite,Calcium lignosulphonate. Also,Calcium lignosulphonate CAS 8061-52-7,Choline Chloride Corn Cob.

Winding

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

Calcium Gluconate CAS 299-28-5

Ferrous Gluconate CAS 299-29-6, 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,Sodium Alginate CAS 9005-38-3. The rope-Xanthan Gum CAS 11138-66-2.

Drawing tow

• 1 Newly-Food Thickener.Aspartame CAS 22839-47-0.

Crimping

• 2 Drawn tow is then fed into compression boxes,Lactose powder CAS 63-42-3, at a rate of 9-15 crimps per inch (3-6 per cm).Sucralose CAS 56038-13-2.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Maltitol CAS 585-88-6.Food Sweetener.

Cutting

• 4 Following heat setting,Potassium Sorbate CAS 24634-61-5. 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)Food Preservatives.Ethyl Vanillin CAS 121-32-4, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Food Flavoring Agents.

The Future

Food Additives,standard ball bearing's fastest-growing fiber.ball screw bearings. 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 module, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Cable Drag Chain. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Laser Cutting Machine, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.