Polyester

Background

Food Additives, air, water, and petroleum. Developed in a 20th-century laboratory,Natural Phospholipids. In this reaction,Natural Lecithin.Modified Lecithin.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Sunflower Lecithin, computer and recording tapes, and electrical insulation.Food Grade Sunflower Lecithin. It does not absorb moisture, but does absorb oil;Natural Lecithin-, soil-, and fire-Sodium Saccharin BP/USP/GMP. Its low absorbency also makes it naturally resistant to stains.Sodium Saccharin CAS 6155-57-3,Sodium Saccharin 40-80 MESH.Anhydrous Sodium Saccharin CAS 128-44-9, and not damaged by mildew.Feed Grade Sodium Saccharin, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Insoluble Saccharin CAS 81-07-2-based E.I. du Pont de Nemours and Co.Sodium Saccharin for Food and Beverage. This early research, headed by W.H. Carothers,Soda ash, 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,Musk Xylene With Crystal Powder. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.100% Natural Musk Ketone Powder,Musk ketone CAS 81-14-1. 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.Light Magnesium Oxide CAS 1309-48-4, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Caustic Soda.

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,Caustic Soda CAS 1310-73-2. In this process, ethylene is the polymer, the chemical building block of polyester,Sodium Hydrosulphite.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Calcium lignosulphonate. The four basic forms are filament,Calcium lignosulphonate CAS 8061-52-7, tow, and fiberfill. In the filament form,Choline Chloride Corn Cob, producing smooth-Calcium Gluconate CAS 299-28-5.Ferrous Gluconate CAS 299-29-6, filaments are cut to short,Sodium Alginate CAS 9005-38-3.Xanthan Gum CAS 11138-66-2. 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 Thickener.

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-Aspartame CAS 22839-47-0,Lactose powder CAS 63-42-3, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Sucralose CAS 56038-13-2. 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.Maltitol CAS 585-88-6, which are usually round,Food Sweetener. The number of holes in the spinneret determines the size of the yarn,Potassium Sorbate CAS 24634-61-5.
• 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,Food Preservatives. 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,Ethyl Vanillin CAS 121-32-4.
• Food Flavoring Agents,Food Additives. Also,standard ball bearing,ball screw bearings.

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 guide module

Cable Drag Chain, 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,Laser Cutting Machine. The rope-Cutting Machine.

Drawing tow

• 1 Newly-1325 Cutting Machine For Sales.CNC Machine.

Crimping

• 2 Drawn tow is then fed into compression boxes,Cable Drag Chain, at a rate of 9-15 crimps per inch (3-6 per cm).Linear Bearing Lm8uu.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Lme 30 uu Linear Bearing.Linear Bearing 20x28x30.

Cutting

• 4 Following heat setting,Linear Bearing 60mm. 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)Linear Bearing For 8mm Shaft.1/2 Inch Linear Bearing, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Linear Ball Bearing.

The Future

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