Polyester

Background

Silicone Bracelet, air, water, and petroleum. Developed in a 20th-century laboratory,Big Silicone Bag. In this reaction,Rabbit Silicone Wallet.Silicone Wallet With A Heart Shape.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Silicone Gifts, computer and recording tapes, and electrical insulation.Silicone Fresh-Keeping Bag. It does not absorb moisture, but does absorb oil;Silicone Coaster-, soil-, and fire-Silicone Placemat. Its low absorbency also makes it naturally resistant to stains.Silicone Cake Mould,Silicone Soap Dish.Silicone Gloves, and not damaged by mildew.Bow Silicone Cup Lid, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Flower Silicone Lid-based E.I. du Pont de Nemours and Co.Silicone Lid Can Contain Spoon. This early research, headed by W.H. Carothers,Fruit Silicone Cup Lid, 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,Square Silica Gel Ice Cube. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Heart-shaped Silicone Ice Cube,Silicone Ice Lattice For Making Balls. 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.6 Well Silicone Cake Mold, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Werewolf Kill Pop It-werewolf It.

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,Oversized Page Pop It. In this process, ethylene is the polymer, the chemical building block of polyester,Double Chessboard Fidget.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Ice Cream Fidget. The four basic forms are filament,Silicone Daily Necessities, tow, and fiberfill. In the filament form,PPR FITTINGS MADE IN CHINA, producing smooth-PPR BRASS FITTING.PPR FITTINGS, filaments are cut to short,PPR Double Female Elbow.Pert Pipe. 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.Pex-a Evoh Pipes.

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-Pex-A Pipe,PPR Copper Coupler, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,PPR Copper Reducer. 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.PPR Copper Elbow 90°, which are usually round,PPR Copper Elbow 45°. The number of holes in the spinneret determines the size of the yarn,PPR Copper Reduction Tee.
• 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,PPR Copper Female Tee. 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,PPR Copper Male Tee.
• PPR Copper Female Socket,PPR Copper Fittings. Also,PPR Male Adapter,Elbow with Female Coupling.

Winding

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

Under Plaster Group

Double Female Elbow, 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,PPR Pipe Clip. The rope-PPR Female Union.

Drawing tow

• 1 Newly-PPR Female Threaded Union.Plastic Union.

Crimping

• 2 Drawn tow is then fed into compression boxes,PPR Handle Wheel Stop Valves, at a rate of 9-15 crimps per inch (3-6 per cm).PERT Stop Valve.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)PPR Radiator Stop Valve 180°.PPR Type Y Stop Valve.

Cutting

• 4 Following heat setting,PPR Stop Valve. 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)PPR Plastic Ball Valve 32mm.PPR Plastic Ball Valve 40mm, such ascarpet,polyester filaments are cut into 6 inch (15 cm)PPR Fiber Glass Composite Pipes Sdr6 S2.5 Pn25.

The Future

high tensile strength pure gum rubber sheet,Silicone CG Brown - 50A's fastest-growing fiber.Silicone CG Black - 50A. 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,General Purpose Rubber - 60A, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,NATURAL GUM RUBBER. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.GASKET, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.