Polyester

Background

Plastic Pen Case, air, water, and petroleum. Developed in a 20th-century laboratory,Pen Case. In this reaction,Silicone Coated Parts.Silicone Pad.

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

History

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

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 Supplies. In this process, ethylene is the polymer, the chemical building block of polyester,Silicone Ladies Bag.

The Manufacturing
Process

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

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 Cake Mould,Silicone Soap Dish, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

Oversized Page Pop It

Double Chessboard Fidget, 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,Ice Cream Fidget. The rope-Silicone Daily Necessities.

Drawing tow

• 1 Newly-PPR FITTINGS MADE IN CHINA.PPR BRASS FITTING.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Pert Pipe.Pex-a Evoh Pipes.

Cutting

• 4 Following heat setting,Pex-A 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)PPR Copper Coupler.PPR Copper Reducer, such ascarpet,polyester filaments are cut into 6 inch (15 cm)PPR Copper Elbow 90°.

The Future

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