Polyester

Background

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

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

History

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

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,Touch Screen Mobile Phone Purse. In this process, ethylene is the polymer, the chemical building block of polyester,Alphabet Cardholder.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Bags Accessories. The four basic forms are filament,Kids Bow Sequin Metallic Backpack, tow, and fiberfill. In the filament form,Kids Polar Fleece Backpack, producing smooth-Kids Backpack Bags.Kids Cross Body Bags, filaments are cut to short,Mens Leopard Print Bum Bag.Mens PU Mix Messenger. 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 Messenger 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 Bags,Womens Weekender Bags, is extruded through a slot to form long ribbons.

Drying

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

Padded Nylon Tote With Front Pocket

Tote 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,Quilted Nylon Backpack. The rope-Casual Nylon Backpack.

Drawing tow

• 1 Newly-Ladies Duffle Cross Body.Structured Formal Cross Body.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Ladies Twist Handle Medium Hobo.Work Bags.

Cutting

• 4 Following heat setting,Womens Bags. 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)Belt Sander.Plate-Type Cutting Center, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Hot-press Machine.

The Future

Hydraulic Shearing Machine,Three Wide Belts Sanding Machine's fastest-growing fiber.Floating Primer Sander. 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,NC Tenoning Machine, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Cnc Double Side Tenon Machine Computer. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.CNC Double-end Tenoning Machine 6 Spindles, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.