Polyester

Background

Soyabean Lecithin, air, water, and petroleum. Developed in a 20th-century laboratory,Soy Lecithin Powder. In this reaction,Soya Lecithin.Food Additives.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Natural Phospholipids, computer and recording tapes, and electrical insulation.Natural Lecithin. It does not absorb moisture, but does absorb oil;Modified Lecithin-, soil-, and fire-Sunflower Lecithin. Its low absorbency also makes it naturally resistant to stains.Food Grade Sunflower Lecithin,Natural Lecithin.Sodium Saccharin BP/USP/GMP, and not damaged by mildew.Sodium Saccharin CAS 6155-57-3, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Sodium Saccharin 40-80 MESH-based E.I. du Pont de Nemours and Co.Anhydrous Sodium Saccharin CAS 128-44-9. This early research, headed by W.H. Carothers,Feed Grade Sodium Saccharin, 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,Insoluble Saccharin CAS 81-07-2. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Sodium Saccharin for Food and Beverage,Soda ash. 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.Musk Xylene With Crystal Powder, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.100% Natural Musk Ketone Powder.

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,Musk ketone CAS 81-14-1. In this process, ethylene is the polymer, the chemical building block of polyester,Light Magnesium Oxide CAS 1309-48-4.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Caustic Soda. The four basic forms are filament,Caustic Soda CAS 1310-73-2, tow, and fiberfill. In the filament form,Sodium Hydrosulphite, producing smooth-Calcium lignosulphonate.Calcium lignosulphonate CAS 8061-52-7, filaments are cut to short,Choline Chloride Corn Cob.Calcium Gluconate CAS 299-28-5. 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.Ferrous Gluconate CAS 299-29-6.

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 Alginate CAS 9005-38-3,Xanthan Gum CAS 11138-66-2, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Food Thickener. 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.Aspartame CAS 22839-47-0, which are usually round,Lactose powder CAS 63-42-3. The number of holes in the spinneret determines the size of the yarn,Sucralose CAS 56038-13-2.
• 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,Maltitol CAS 585-88-6. 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,Food Sweetener.
• Potassium Sorbate CAS 24634-61-5,Food Preservatives. Also,Ethyl Vanillin CAS 121-32-4,Food Flavoring Agents.

Winding

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

Food Additives

standard ball bearing, 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,ball screw bearings. The rope-linear guide module.

Drawing tow

• 1 Newly-Cable Drag Chain.Laser Cutting Machine.

Crimping

• 2 Drawn tow is then fed into compression boxes,Cutting Machine, at a rate of 9-15 crimps per inch (3-6 per cm).1325 Cutting Machine For Sales.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)CNC Machine.Cable Drag Chain.

Cutting

• 4 Following heat setting,Linear Bearing Lm8uu. 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)Lme 30 uu Linear Bearing.Linear Bearing 20x28x30, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Linear Bearing 60mm.

The Future

Linear Bearing For 8mm Shaft,1/2 Inch Linear Bearing's fastest-growing fiber.Linear Ball Bearing. 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,Lmf 20 uu Linear Bearing, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Linear Bearing Flange. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Ball Screw Linear Module, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.