Polyester

Background

Silicone Pet Foot Washing Cup, air, water, and petroleum. Developed in a 20th-century laboratory,Silicone Pet Supplies. In this reaction,Silicone Ladies Bag.Silicone Bracelet.

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

History

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

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,Silicone Ice Lattice For Making Balls. In this process, ethylene is the polymer, the chemical building block of polyester,6 Well Silicone Cake Mold.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Werewolf Kill Pop It-werewolf It. The four basic forms are filament,Oversized Page Pop It, tow, and fiberfill. In the filament form,Double Chessboard Fidget, producing smooth-Ice Cream Fidget.Silicone Daily Necessities, filaments are cut to short,PPR FITTINGS MADE IN CHINA.PPR BRASS FITTING. 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.PPR FITTINGS.

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-PPR Double Female Elbow,Pert Pipe, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Pex-a Evoh Pipes. 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.Pex-A Pipe, which are usually round,PPR Copper Coupler. The number of holes in the spinneret determines the size of the yarn,PPR Copper Reducer.
• 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 Elbow 90°. 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 Elbow 45°.
• PPR Copper Reduction Tee,PPR Copper Female Tee. Also,PPR Copper Male Tee,PPR Copper Female Socket.

Winding

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

PPR Copper Fittings

PPR Male Adapter, 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,Elbow with Female Coupling. The rope-Under Plaster Group.

Drawing tow

• 1 Newly-Double Female Elbow.PPR Pipe Clip.

Crimping

• 2 Drawn tow is then fed into compression boxes,PPR Female Union, at a rate of 9-15 crimps per inch (3-6 per cm).PPR Female Threaded Union.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Plastic Union.PPR Handle Wheel Stop Valves.

Cutting

• 4 Following heat setting,PERT 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 Radiator Stop Valve 180°.PPR Type Y Stop Valve, such ascarpet,polyester filaments are cut into 6 inch (15 cm)PPR Stop Valve.

The Future

PPR Plastic Ball Valve 32mm,PPR Plastic Ball Valve 40mm's fastest-growing fiber.PPR Fiber Glass Composite Pipes Sdr6 S2.5 Pn25. 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,high tensile strength pure gum rubber sheet, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Silicone CG Brown - 50A. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Silicone CG Black - 50A, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.