Polyester

Background

400mm Double Layers Folding Shelf, air, water, and petroleum. Developed in a 20th-century laboratory,300mm Double Layers Folding Shelf. In this reaction,Folding Shelf.Bathroom Glass Shelf with Round Base.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Glass Shelf, computer and recording tapes, and electrical insulation.Perforation-free Wall-mounted Storage Plastic Box. It does not absorb moisture, but does absorb oil;Perforation-free Wall-mounted Hair Dryer Storage Plastic Box-, soil-, and fire-Plastic Box. Its low absorbency also makes it naturally resistant to stains.Bathroom Metal Towel Rack With Glass Panel,Bathroom Metal Towel Rack.Metal Towel Rack, and not damaged by mildew.Popular Metal Tissue Holder, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Tissue Holder-based E.I. du Pont de Nemours and Co.Basketball Sports Storage Rack. This early research, headed by W.H. Carothers,Rectangular Towel Rack, 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,Shower Handle Metal Holder. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Perforation-free Self-sticky Helmet Metal Holder,Hair Driver Holder For Hotel. 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.Large Storage Basket, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Storage Basket.

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,Metal Storage Basket for Kitchen. In this process, ethylene is the polymer, the chemical building block of polyester,Multi-functional Storage Metal Basket for Kitchen.

The Manufacturing
Process

Polyester is manufactured by one of several methods.White Multi-functional Storagemetal Basket. The four basic forms are filament,Self-stick double hooks, tow, and fiberfill. In the filament form,Self-stick Hooks, producing smooth-Self-stick Hooks.New Style Metal Hooks, filaments are cut to short,Over Door Metal Hooks.Over Door Metal Hook with Basket. 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.Telescoping Pedestal Paper Holder.

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-Paper Holder,Rubber Foot Pads, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Black Felt Foot Pads. 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.Self-adhesive Felt Foot Pads Furniture, which are usually round,Felt Foot Pads For Desk Legs. The number of holes in the spinneret determines the size of the yarn,Rectangle Felt Foot Pads.
• 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,Black Square Felt Foot Pads. 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,Strong Adhesives Felt Foot Pads.
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Winding

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

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CNC Axis Types, 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,Aluminum Bar. The rope-CNC Milling Machine Parts.

Drawing tow

• 1 Newly-Milling Small Parts.Hardware Decoration.

Crimping

• 2 Drawn tow is then fed into compression boxes,High Speed CNC Milling, at a rate of 9-15 crimps per inch (3-6 per cm).Cell Phone Frame.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Mobile Phone Frame.Die head.

Cutting

• 4 Following heat setting,CNC Parts Manufacturer. 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)Unmanned Plane Parts.CNC Lathe Parts Charging Pile, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Assembled box.

The Future

Light Cover,Lamp Housing's fastest-growing fiber.Medical Instrument Parts. 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,Surgical Instrument Parts, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,CNC Machining Medical Devices. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Flashlight Parts, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.