Polyester

Background

Silicone Face Brush, air, water, and petroleum. Developed in a 20th-century laboratory,Silicone Teether. In this reaction,Silicone ChildrenS Dinner Plate.Silicone Pet Placemat.

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

History

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

The Manufacturing
Process

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

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-Ice Cream Fidget,Silicone Daily Necessities, is extruded through a slot to form long ribbons.

Drying

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

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 Elbow 45°

PPR Copper Reduction 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 Tee. The rope-PPR Copper Male Tee.

Drawing tow

• 1 Newly-PPR Copper Female Socket.PPR Copper Fittings.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Under Plaster Group.Double Female Elbow.

Cutting

• 4 Following heat setting,PPR Pipe Clip. 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 Female Union.PPR Female Threaded Union, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Plastic Union.

The Future

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