Polyester

Background

Life Jacket Lights, air, water, and petroleum. Developed in a 20th-century laboratory,Safety Lights. In this reaction,Lifejacket Lights on test.Auto Inflatable Wristband.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Air Sailing Life Jackets with Automatic Inflation, computer and recording tapes, and electrical insulation.Life Jacket Safety. It does not absorb moisture, but does absorb oil;Automatic life jackets-, soil-, and fire-Automatic Inflatable Life Jacket. Its low absorbency also makes it naturally resistant to stains.Accessories for inflatable lifejackets,Fishing boat immersion suit.Inclined Cradle, and not damaged by mildew.Self-Righting Throwing Life Raft, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Inflatable Liferaft-based E.I. du Pont de Nemours and Co.Multi-Function Dump Device. This early research, headed by W.H. Carothers,Pneumatic of Dump Device, 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,Self-Sustaining Rope Thrower. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Marine Life Saving Fireworks Signal,Lifejacket Light. 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.Inflatable Waistband, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Motorcycle Safety Clothing.

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,Pet Body Belt. In this process, ethylene is the polymer, the chemical building block of polyester,Pet Body Belt Bags.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Touch Screen Mobile Phone Purse. The four basic forms are filament,Alphabet Cardholder, tow, and fiberfill. In the filament form,Bags Accessories, producing smooth-Kids Bow Sequin Metallic Backpack.Kids Polar Fleece Backpack, filaments are cut to short,Kids Backpack Bags.Kids Cross Body Bags. 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.Mens Leopard Print Bum Bag.

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-Mens PU Mix Messenger,Mens Messenger Bags, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Mens Bags. 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.Womens Weekender Bags, which are usually round,Rainbow Trim Bum Bag. The number of holes in the spinneret determines the size of the yarn,Set of Four Holiday.
• 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,Beauty Case Bags. 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,Set Of Four Make Up Bags.
• Make Up Bags,Allover Printed Nylon Shopper. Also,Woven Panel Camera Bag,Smooth Structured Tote.

Winding

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

Ladies Quilted Tote

Faux Fur Midi Tote, 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,Padded Nylon Tote With Front Pocket. The rope-Tote Bags.

Drawing tow

• 1 Newly-Quilted Nylon Backpack.Casual Nylon Backpack.

Crimping

• 2 Drawn tow is then fed into compression boxes,Ladies Duffle Cross Body, at a rate of 9-15 crimps per inch (3-6 per cm).Structured Formal Cross Body.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Quilted Boxy Cross Body.Ladies Monogram Hobo.

Cutting

• 4 Following heat setting,Ladies Twist Handle Medium Hobo. 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)Work Bags.Womens Bags, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Belt Sander.

The Future

Plate-Type Cutting Center,Hot-press Machine's fastest-growing fiber.Hydraulic Shearing Machine. 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,Three Wide Belts Sanding Machine, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Floating Primer Sander. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.NC Tenoning Machine, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.