Polyester

Background

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

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

History

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

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,Square Silica Gel Ice Cube. In this process, ethylene is the polymer, the chemical building block of polyester,Heart-shaped Silicone Ice Cube.

The Manufacturing
Process

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

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

Drying

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

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

Drawing tow

• 1 Newly-Elbow with Female Coupling.Under Plaster Group.

Crimping

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

Setting

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

Cutting

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

The Future

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