Polyester

Background

Plastic Stationery Item, air, water, and petroleum. Developed in a 20th-century laboratory,Stationery Item. In this reaction,PP Pen Box With Various Styles.Plastic Double Side Pencil Case.

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

History

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

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,Rubber Sealed Loop. In this process, ethylene is the polymer, the chemical building block of polyester,Silicone Pacifier.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Silicone Nail Pad. The four basic forms are filament,Silicone Beauty Scrubbing Pad, tow, and fiberfill. In the filament form,Silicone Molars, producing smooth-Silicone Baby Bottle Cover.Silicone Face Brush, filaments are cut to short,Silicone Teether.Silicone ChildrenS Dinner Plate. 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 Pet 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 Pet Slow Food Device,Silicone Pet Foot Washing Cup, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Silicone Pet Supplies. 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 Ladies Bag, which are usually round,Silicone Bracelet. The number of holes in the spinneret determines the size of the yarn,Big Silicone Bag.
• 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,Rabbit Silicone Wallet. 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 Wallet With A Heart Shape.
• Silicone Gifts,Silicone Fresh-Keeping Bag. Also,Silicone Coaster,Silicone Placemat.

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 Cake Mould

Silicone Soap Dish, 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,Silicone Gloves. The rope-Bow Silicone Cup Lid.

Drawing tow

• 1 Newly-Flower Silicone Lid.Silicone Lid Can Contain Spoon.

Crimping

• 2 Drawn tow is then fed into compression boxes,Fruit Silicone Cup Lid, at a rate of 9-15 crimps per inch (3-6 per cm).Square Silica Gel Ice Cube.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Heart-shaped Silicone Ice Cube.Silicone Ice Lattice For Making Balls.

Cutting

• 4 Following heat setting,6 Well Silicone Cake Mold. 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)Werewolf Kill Pop It-werewolf It.Oversized Page Pop It, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Double Chessboard Fidget.

The Future

Ice Cream Fidget,Silicone Daily Necessities's fastest-growing fiber.PPR FITTINGS MADE IN CHINA. 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 BRASS FITTING, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,PPR FITTINGS. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.PPR Double Female Elbow, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.