Polyester

Background

Silicone Pad, air, water, and petroleum. Developed in a 20th-century laboratory,Silicone Gasket. In this reaction,Silicone Sealing Ring.Silicone Accessories.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Silicone Special-Shaped Waterproof Ring, computer and recording tapes, and electrical insulation.Rubber Sealed Loop. It does not absorb moisture, but does absorb oil;Silicone Pacifier-, soil-, and fire-Silicone Nail Pad. Its low absorbency also makes it naturally resistant to stains.Silicone Beauty Scrubbing Pad,Silicone Molars.Silicone Baby Bottle Cover, and not damaged by mildew.Silicone Face Brush, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Silicone Teether-based E.I. du Pont de Nemours and Co.Silicone ChildrenS Dinner Plate. This early research, headed by W.H. Carothers,Silicone Pet Placemat, 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 Pet Slow Food Device. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Silicone Pet Foot Washing Cup,Silicone Pet Supplies. 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 Ladies Bag, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Silicone Bracelet.

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,Big Silicone Bag. In this process, ethylene is the polymer, the chemical building block of polyester,Rabbit Silicone Wallet.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Silicone Wallet With A Heart Shape. The four basic forms are filament,Silicone Gifts, tow, and fiberfill. In the filament form,Silicone Fresh-Keeping Bag, producing smooth-Silicone Coaster.Silicone Placemat, filaments are cut to short,Silicone Cake Mould.Silicone Soap Dish. 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 Gloves.

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-Bow Silicone Cup Lid,Flower Silicone Lid, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Silicone Lid Can Contain Spoon. 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.Fruit Silicone Cup Lid, which are usually round,Square Silica Gel Ice Cube. The number of holes in the spinneret determines the size of the yarn,Heart-shaped Silicone Ice Cube.
• 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,Silicone Ice Lattice For Making Balls. 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,6 Well Silicone Cake Mold.
• Werewolf Kill Pop It-werewolf It,Oversized Page Pop It. Also,Double Chessboard Fidget,Ice Cream Fidget.

Winding

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

Silicone Daily Necessities

PPR FITTINGS MADE IN CHINA, 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 BRASS FITTING. The rope-PPR FITTINGS.

Drawing tow

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

Crimping

• 2 Drawn tow is then fed into compression boxes,Pex-a Evoh Pipes, at a rate of 9-15 crimps per inch (3-6 per cm).Pex-A Pipe.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)PPR Copper Coupler.PPR Copper Reducer.

Cutting

• 4 Following heat setting,PPR Copper Elbow 90°. 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 Copper Elbow 45°.PPR Copper Reduction Tee, such ascarpet,polyester filaments are cut into 6 inch (15 cm)PPR Copper Female Tee.

The Future

PPR Copper Male Tee,PPR Copper Female Socket's fastest-growing fiber.PPR Copper Fittings. 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 Male Adapter, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Elbow with Female Coupling. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Under Plaster Group, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.