Polyester

Background

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

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

History

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

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,Marine Life Saving Fireworks Signal. In this process, ethylene is the polymer, the chemical building block of polyester,Lifejacket Light.

The Manufacturing
Process

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

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-Kids Polar Fleece Backpack,Kids Backpack Bags, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

Make Up Bags

Allover Printed Nylon Shopper, 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,Woven Panel Camera Bag. The rope-Smooth Structured Tote.

Drawing tow

• 1 Newly-Ladies Quilted Tote.Faux Fur Midi Tote.

Crimping

• 2 Drawn tow is then fed into compression boxes,Padded Nylon Tote With Front Pocket, at a rate of 9-15 crimps per inch (3-6 per cm).Tote Bags.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Quilted Nylon Backpack.Casual Nylon Backpack.

Cutting

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

The Future

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