Polyester

Background

Rubber Sealed Loop, air, water, and petroleum. Developed in a 20th-century laboratory,Silicone Pacifier. In this reaction,Silicone Nail Pad.Silicone Beauty Scrubbing Pad.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Silicone Molars, computer and recording tapes, and electrical insulation.Silicone Baby Bottle Cover. It does not absorb moisture, but does absorb oil;Silicone Face Brush-, soil-, and fire-Silicone Teether. Its low absorbency also makes it naturally resistant to stains.Silicone ChildrenS Dinner Plate,Silicone Pet Placemat.Silicone Pet Slow Food Device, and not damaged by mildew.Silicone Pet Foot Washing Cup, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Silicone Pet Supplies-based E.I. du Pont de Nemours and Co.Silicone Ladies Bag. This early research, headed by W.H. Carothers,Silicone Bracelet, 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,Big Silicone Bag. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Rabbit Silicone Wallet,Silicone Wallet With A Heart Shape. 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 Gifts, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Silicone Fresh-Keeping Bag.

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 Coaster. In this process, ethylene is the polymer, the chemical building block of polyester,Silicone Placemat.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Silicone Cake Mould. The four basic forms are filament,Silicone Soap Dish, tow, and fiberfill. In the filament form,Silicone Gloves, producing smooth-Bow Silicone Cup Lid.Flower Silicone Lid, filaments are cut to short,Silicone Lid Can Contain Spoon.Fruit Silicone Cup Lid. 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.Square Silica Gel Ice Cube.

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-Heart-shaped Silicone Ice Cube,Silicone Ice Lattice For Making Balls, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,6 Well Silicone Cake Mold. 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.Werewolf Kill Pop It-werewolf It, which are usually round,Oversized Page Pop It. The number of holes in the spinneret determines the size of the yarn,Double Chessboard Fidget.
• 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,Ice Cream Fidget. 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,Silicone Daily Necessities.
• PPR FITTINGS MADE IN CHINA,PPR BRASS FITTING. Also,PPR FITTINGS,PPR Double Female Elbow.

Winding

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

Pert Pipe

Pex-a Evoh Pipes, 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,Pex-A Pipe. The rope-PPR Copper Coupler.

Drawing tow

• 1 Newly-PPR Copper Reducer.PPR Copper Elbow 90°.

Crimping

• 2 Drawn tow is then fed into compression boxes,PPR Copper Elbow 45°, at a rate of 9-15 crimps per inch (3-6 per cm).PPR Copper Reduction Tee.

Setting

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

Cutting

• 4 Following heat setting,PPR Copper Female Socket. 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 Fittings.PPR Male Adapter, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Elbow with Female Coupling.

The Future

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