Polyester

Background

Solid Color PP Pen Case, air, water, and petroleum. Developed in a 20th-century laboratory,PP Pen Case With Logo. In this reaction,Plastic Pen Case.Pen Case.

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

History

In 1926,Silicone Nail Pad-based E.I. du Pont de Nemours and Co.Silicone Beauty Scrubbing Pad. This early research, headed by W.H. Carothers,Silicone Molars, 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 Baby Bottle Cover. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Silicone Face Brush,Silicone Teether. 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 ChildrenS Dinner Plate, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Silicone Pet Placemat.

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 Pet Slow Food Device. In this process, ethylene is the polymer, the chemical building block of polyester,Silicone Pet Foot Washing Cup.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Silicone Pet Supplies. The four basic forms are filament,Silicone Ladies Bag, tow, and fiberfill. In the filament form,Silicone Bracelet, producing smooth-Big Silicone Bag.Rabbit Silicone Wallet, filaments are cut to short,Silicone Wallet With A Heart Shape.Silicone Gifts. 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 Fresh-Keeping Bag.

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-Silicone Coaster,Silicone Placemat, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Silicone Cake Mould. 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.Silicone Soap Dish, which are usually round,Silicone Gloves. The number of holes in the spinneret determines the size of the yarn,Bow Silicone Cup Lid.
• 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,Flower Silicone Lid. 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 Lid Can Contain Spoon.
• Fruit Silicone Cup Lid,Square Silica Gel Ice Cube. Also,Heart-shaped Silicone Ice Cube,Silicone Ice Lattice For Making Balls.

Winding

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

6 Well Silicone Cake Mold

Werewolf Kill Pop It-werewolf It, 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,Oversized Page Pop It. The rope-Double Chessboard Fidget.

Drawing tow

• 1 Newly-Ice Cream Fidget.Silicone Daily Necessities.

Crimping

• 2 Drawn tow is then fed into compression boxes,PPR FITTINGS MADE IN CHINA, at a rate of 9-15 crimps per inch (3-6 per cm).PPR BRASS FITTING.

Setting

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

Cutting

• 4 Following heat setting,Pert Pipe. 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)Pex-a Evoh Pipes.Pex-A Pipe, such ascarpet,polyester filaments are cut into 6 inch (15 cm)PPR Copper Coupler.

The Future

PPR Copper Reducer,PPR Copper Elbow 90°'s fastest-growing fiber.PPR Copper Elbow 45°. 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 Copper Reduction Tee, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,PPR Copper Female Tee. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.PPR Copper Male Tee, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.