Polyester

Background

Disposable Protective Kids Masks, air, water, and petroleum. Developed in a 20th-century laboratory,Container. In this reaction,Double Inclined Cradle.Container.

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

History

In 1926,Automatic life jackets-based E.I. du Pont de Nemours and Co.Automatic Inflatable Life Jacket. This early research, headed by W.H. Carothers,Accessories for inflatable lifejackets, 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,Fishing boat immersion suit. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Inclined Cradle,Self-Righting Throwing Life Raft. 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 Liferaft, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Multi-Function Dump Device.

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,Pneumatic of Dump Device. In this process, ethylene is the polymer, the chemical building block of polyester,Self-Sustaining Rope Thrower.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Marine Life Saving Fireworks Signal. The four basic forms are filament,Lifejacket Light, tow, and fiberfill. In the filament form,Inflatable Waistband, producing smooth-Motorcycle Safety Clothing.Pet Body Belt, filaments are cut to short,Pet Body Belt Bags.Touch Screen Mobile Phone Purse. 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.Alphabet Cardholder.

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-Bags Accessories,Kids Bow Sequin Metallic Backpack, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Kids Polar Fleece Backpack. 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.Kids Backpack Bags, which are usually round,Kids Cross Body Bags. The number of holes in the spinneret determines the size of the yarn,Mens Leopard Print 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,Mens PU Mix Messenger. 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,Mens Messenger Bags.
• Mens Bags,Womens Weekender Bags. Also,Rainbow Trim Bum Bag,Set of Four Holiday.

Winding

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

Beauty Case Bags

Set Of Four Make Up Bags, 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,Make Up Bags. The rope-Allover Printed Nylon Shopper.

Drawing tow

• 1 Newly-Woven Panel Camera Bag.Smooth Structured Tote.

Crimping

• 2 Drawn tow is then fed into compression boxes,Ladies Quilted Tote, at a rate of 9-15 crimps per inch (3-6 per cm).Faux Fur Midi Tote.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Padded Nylon Tote With Front Pocket.Tote Bags.

Cutting

• 4 Following heat setting,Quilted Nylon Backpack. 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)Casual Nylon Backpack.Ladies Duffle Cross Body, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Structured Formal Cross Body.

The Future

Quilted Boxy Cross Body,Ladies Monogram Hobo's fastest-growing fiber.Ladies Twist Handle Medium Hobo. 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,Work Bags, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Womens Bags. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Belt Sander, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.