Polyester

Background

Silicone ChildrenS Dinner Plate, air, water, and petroleum. Developed in a 20th-century laboratory,Silicone Pet Placemat. In this reaction,Silicone Pet Slow Food Device.Silicone Pet Foot Washing Cup.

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

History

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

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,Fruit Silicone Cup Lid. In this process, ethylene is the polymer, the chemical building block of polyester,Square Silica Gel Ice Cube.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Heart-shaped Silicone Ice Cube. The four basic forms are filament,Silicone Ice Lattice For Making Balls, tow, and fiberfill. In the filament form,6 Well Silicone Cake Mold, producing smooth-Werewolf Kill Pop It-werewolf It.Oversized Page Pop It, filaments are cut to short,Double Chessboard Fidget.Ice Cream Fidget. 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.Silicone Daily Necessities.

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 FITTINGS MADE IN CHINA,PPR BRASS FITTING, is extruded through a slot to form long ribbons.

Drying

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

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 Female Tee

PPR Copper Male Tee, 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 Copper Female Socket. The rope-PPR Copper Fittings.

Drawing tow

• 1 Newly-PPR Male Adapter.Elbow with Female Coupling.

Crimping

• 2 Drawn tow is then fed into compression boxes,Under Plaster Group, at a rate of 9-15 crimps per inch (3-6 per cm).Double Female Elbow.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)PPR Pipe Clip.PPR Female Union.

Cutting

• 4 Following heat setting,PPR Female Threaded Union. 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)Plastic Union.PPR Handle Wheel Stop Valves, such ascarpet,polyester filaments are cut into 6 inch (15 cm)PERT Stop Valve.

The Future

PPR Radiator Stop Valve 180°,PPR Type Y Stop Valve's fastest-growing fiber.PPR Stop Valve. 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,PPR Plastic Ball Valve 32mm, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,PPR Plastic Ball Valve 40mm. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.PPR Fiber Glass Composite Pipes Sdr6 S2.5 Pn25, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.