Polyester

Background

Cement Mortar Spray Machine, air, water, and petroleum. Developed in a 20th-century laboratory,Food Additives. In this reaction,PS Phosphatidylserine.Phosphatidylserine.

Polyester is used in the manufacture of many products, including clothing, home furnishings,super soya lecithin, computer and recording tapes, and electrical insulation.Soy Lecithin granules. It does not absorb moisture, but does absorb oil;Soyabean Lecithin-, soil-, and fire-Soy Lecithin Powder. Its low absorbency also makes it naturally resistant to stains.Soya Lecithin,Food Additives.Natural Phospholipids, and not damaged by mildew.Natural Lecithin, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Modified Lecithin-based E.I. du Pont de Nemours and Co.Sunflower Lecithin. This early research, headed by W.H. Carothers,Food Grade Sunflower 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,Natural Lecithin. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Sodium Saccharin BP/USP/GMP,Sodium Saccharin CAS 6155-57-3. 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.Sodium Saccharin 40-80 MESH, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Anhydrous Sodium Saccharin CAS 128-44-9.

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,Feed Grade Sodium Saccharin. In this process, ethylene is the polymer, the chemical building block of polyester,Insoluble Saccharin CAS 81-07-2.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Sodium Saccharin for Food and Beverage. The four basic forms are filament,Soda ash, tow, and fiberfill. In the filament form,Musk Xylene With Crystal Powder, producing smooth-100% Natural Musk Ketone Powder.Musk ketone CAS 81-14-1, filaments are cut to short,Light Magnesium Oxide CAS 1309-48-4.Caustic Soda. 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.Caustic Soda CAS 1310-73-2.

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 Hydrosulphite,Calcium lignosulphonate, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Calcium lignosulphonate CAS 8061-52-7. 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.Choline Chloride Corn Cob, which are usually round,Calcium Gluconate CAS 299-28-5. The number of holes in the spinneret determines the size of the yarn,Ferrous Gluconate CAS 299-29-6.
• 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,Sodium Alginate CAS 9005-38-3. 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,Xanthan Gum CAS 11138-66-2.
• Food Thickener,Aspartame CAS 22839-47-0. Also,Lactose powder CAS 63-42-3,Sucralose CAS 56038-13-2.

Winding

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

Maltitol CAS 585-88-6

Food Sweetener, 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,Potassium Sorbate CAS 24634-61-5. The rope-Food Preservatives.

Drawing tow

• 1 Newly-Ethyl Vanillin CAS 121-32-4.Food Flavoring Agents.

Crimping

• 2 Drawn tow is then fed into compression boxes,Food Additives, at a rate of 9-15 crimps per inch (3-6 per cm).standard ball bearing.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)ball screw bearings.linear guide module.

Cutting

• 4 Following heat setting,Cable Drag Chain. 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)Laser Cutting Machine.Cutting Machine, such ascarpet,polyester filaments are cut into 6 inch (15 cm)1325 Cutting Machine For Sales.

The Future

CNC Machine,Cable Drag Chain's fastest-growing fiber.Linear Bearing Lm8uu. 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,Lme 30 uu Linear Bearing, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Linear Bearing 20x28x30. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Linear Bearing 60mm, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.