Polyester

Background

Pinkycolor PP Pencil Case, air, water, and petroleum. Developed in a 20th-century laboratory,High-quality PP Pencil Case. In this reaction,PP Pencil Case.Multicolor Plastic Pencil Case.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Printable Plastic Pencil Case, computer and recording tapes, and electrical insulation.Solid Color PP Pen Case. It does not absorb moisture, but does absorb oil;PP Pen Case With Logo-, soil-, and fire-Plastic Pen Case. Its low absorbency also makes it naturally resistant to stains.Pen Case,Silicone Coated Parts.Silicone Pad, and not damaged by mildew.Silicone Gasket, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Silicone Sealing Ring-based E.I. du Pont de Nemours and Co.Silicone Accessories. This early research, headed by W.H. Carothers,Silicone Special-Shaped Waterproof Ring, 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,Rubber Sealed Loop. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Silicone Pacifier,Silicone Nail Pad. 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 Beauty Scrubbing Pad, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Silicone Molars.

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 Baby Bottle Cover. In this process, ethylene is the polymer, the chemical building block of polyester,Silicone Face Brush.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Silicone Teether. The four basic forms are filament,Silicone ChildrenS Dinner Plate, tow, and fiberfill. In the filament form,Silicone Pet Placemat, producing smooth-Silicone Pet Slow Food Device.Silicone Pet Foot Washing Cup, filaments are cut to short,Silicone Pet Supplies.Silicone Ladies Bag. 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 Bracelet.

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-Big Silicone Bag,Rabbit Silicone Wallet, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Silicone Wallet With A Heart Shape. 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 Gifts, which are usually round,Silicone Fresh-Keeping Bag. The number of holes in the spinneret determines the size of the yarn,Silicone Coaster.
• 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 Placemat. 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 Cake Mould.
• Silicone Soap Dish,Silicone Gloves. Also,Bow Silicone Cup Lid,Flower Silicone Lid.

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 Lid Can Contain Spoon

Fruit Silicone Cup Lid, 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,Square Silica Gel Ice Cube. The rope-Heart-shaped Silicone Ice Cube.

Drawing tow

• 1 Newly-Silicone Ice Lattice For Making Balls.6 Well Silicone Cake Mold.

Crimping

• 2 Drawn tow is then fed into compression boxes,Werewolf Kill Pop It-werewolf It, at a rate of 9-15 crimps per inch (3-6 per cm).Oversized Page Pop It.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Double Chessboard Fidget.Ice Cream Fidget.

Cutting

• 4 Following heat setting,Silicone Daily Necessities. 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 FITTINGS MADE IN CHINA.PPR BRASS FITTING, such ascarpet,polyester filaments are cut into 6 inch (15 cm)PPR FITTINGS.

The Future

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