Polyester

Background

Full Automatic Spiral Wound Gasket Winding Machine, air, water, and petroleum. Developed in a 20th-century laboratory,china cheap Spiral wound gaskets. In this reaction,BX Ring Joint Gasket.china RX Ring Joint Gasket supplier.

Polyester is used in the manufacture of many products, including clothing, home furnishings,RX Ring Joint Gasket, computer and recording tapes, and electrical insulation.china cheap PTFE Gaskets. It does not absorb moisture, but does absorb oil;PTFE Gaskets-, soil-, and fire-viton gasket. Its low absorbency also makes it naturally resistant to stains.NBR gasket,SBR gasket.Graphite gaskets, and not damaged by mildew.Automatic Winding Machine for Spiral Wound Gaskets, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Medium Winding Machine for Spiral Wound Gasket-based E.I. du Pont de Nemours and Co.low price Small Winding Machine for Spiral Wound Gasket. This early research, headed by W.H. Carothers,Small Winding Machine for Spiral Wound Gasket, 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,china Viton rubber sheet factory. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Viton rubber sheet,china Nitrile Rubber sipplier. 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.Nitrile Rubber, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.china Neoprene Rubber supplier.

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,china Natural Rubber Insertion factory. In this process, ethylene is the polymer, the chemical building block of polyester,Natural Rubber Insertion.

The Manufacturing
Process

Polyester is manufactured by one of several methods.china EPDM rubber factory. The four basic forms are filament,Small Winding Machine for Spiral Wound Gasket, tow, and fiberfill. In the filament form,Medium Winding Machine for Spiral Wound Gasket, producing smooth-Automatic Winding Machine for Spiral Wound Gaskets.Expanded PTFE Sealing Tape, filaments are cut to short,Expanded PTFE Sheet.EXPANDED PTFE SHEET. 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.EPDM rubber.

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-Natural Rubber Insertion,Neoprene Rubber, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Nitrile Rubber. 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.RUBBE SHEET, which are usually round,Flange gaskets. The number of holes in the spinneret determines the size of the yarn,FLANGE GASKETS.
• 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,Rubber gaskets and seals. 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,GRAPHITE GASKETS AND SEALS.
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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.

Magnetic Socks，magnetic compression socks，magnetic therapy socks

Mens Socks | Trainer, 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,Health care products. The rope-Saliva Test Kits.

Drawing tow

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Crimping

• 2 Drawn tow is then fed into compression boxes,Oxygen Concentrator, at a rate of 9-15 crimps per inch (3-6 per cm).Sphygmomanometers.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Non-contact Digital Thermometer.Diagnostics.

Cutting

• 4 Following heat setting,Endotracheal Tube. 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)Nasopharyngeal Airway.Anesthesia Supplies, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Yank.

The Future

Surgery Supplies,Zinc Oxide Plaster's fastest-growing fiber.Alcohol Swabs. 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,Wound Dressing, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Paraffin Gauze. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.KN95 Protective Mask, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.