Polyester

Background

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

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

History

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

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

The Manufacturing
Process

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

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 Leopard Print Bum Bag,Mens PU Mix Messenger, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

Smooth Structured Tote

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

Drawing tow

• 1 Newly-Tote Bags.Quilted Nylon Backpack.

Crimping

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

Setting

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

Cutting

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

The Future

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