Polyester

Background

Fiberglass Long Automatic Children Umbrella, air, water, and petroleum. Developed in a 20th-century laboratory,POE Long Automatic Children Umbrella. In this reaction,EVA Print Children Umbrella.Manual Open Adult Wooden Stick Umbrella.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Rainbow Adult Stick Automatic Umbrella, computer and recording tapes, and electrical insulation.Special Rainbow Edge Long Adult Stick Umbrella. It does not absorb moisture, but does absorb oil;Double Layer Special Adult Stick Umbrella-, soil-, and fire-Automatic Long Stick Rain Umbrellas. Its low absorbency also makes it naturally resistant to stains.Gent Folding Super Mini Manual Open Umbrella,Folding Manual Open Umbrella.Wooden Two Folding Automatic Golf Umbrella, and not damaged by mildew.Folding Umbrella, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Natural Cork Composition Sheets-based E.I. du Pont de Nemours and Co.Cork and Nitrile Rubber sheets. This early research, headed by W.H. Carothers,Farmhouse Large Decorative Wall Clocks, 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,Pallet Wood Barn Farmhouse Wall Clock. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Black Windmill Wall Hook,Inspired Home Windmill Decor Wall Hooks. 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.Windmill Metal Wall Decor with Hook, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Quartz Decorative Wall Clock.

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,Multi-size Home Office Large Wall Clock. In this process, ethylene is the polymer, the chemical building block of polyester,12 Inch Printed Face Wall Clock.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Christmas Wood and Metal Crafts. The four basic forms are filament,Fall-wood and Metal Crafts, tow, and fiberfill. In the filament form,Bird House Spring Wood Planter, producing smooth-Distressed Wood Slat Wall Mirror.Large Windmill Home Decoration Wall Hook, filaments are cut to short,Vintage Look White Wash Metal Frame Wood Cabinet Storage With 6 Drawers.Vintage Look Cabinet. 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.Cabinet with 6 Drawers.

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-Furniture,Metal Planter Tray With Handles, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Antique Metal Planter Pot with Stands Décor. 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.Metal Planter, which are usually round,Rectangular MDF Wood Planter. The number of holes in the spinneret determines the size of the yarn,Square Mdf Wood Planter.
• 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,Geometric Wood Planter. 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,Antique Distressed Color Wood Planter.
• Graphite PTFE Yarn,Multiple PTFE Filament Yarn. Also,PTFE Packing with Kynol Fiber Corners,ASME Spiral Wound Gasket.

Winding

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

glass-to-glass

Exhaust Spiral Wound Gaskets, 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,Special Materials Spiral Wound Gaskets. The rope-Nuclear Spiral Wound Gasket.

Drawing tow

• 1 Newly-Kynol Fiber Packing.graphite gasket.

Crimping

• 2 Drawn tow is then fed into compression boxes,Carbonized Fiber Packing with Graphite, at a rate of 9-15 crimps per inch (3-6 per cm).Carbonized Fiber Packing.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)graphite gasket.teflon ring gasket.

Cutting

• 4 Following heat setting,Corrugated Graphite Tapes. 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)Braided Graphite Tube.PTFE Joint Sealant, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Joint Sealant Flange Gasket.

The Future

Expanded PTFE Products,eptfe's fastest-growing fiber.ptfe joint sealant tape. 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,Graphite Packing With PTFE Impregnated, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Corrugated Graphite Tapes. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.CGFO Packing, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.