Polyester

Background

Medical Isolation Gown, air, water, and petroleum. Developed in a 20th-century laboratory,Medical isolation gown. In this reaction,Disposable Medical Isolation Clothing.Non-medical Protective Clothing.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Medical Protective Clothing, computer and recording tapes, and electrical insulation.Medical Protective Clothing Gown. It does not absorb moisture, but does absorb oil;Medical Protective Clothing-, soil-, and fire-Protective Clothing. Its low absorbency also makes it naturally resistant to stains.Medical Digital Non-Contact Forehead Infrared Thermometer,Digital No Touch Medical Gun Body Forehead Infrared Thermometer.Digital wall mounted thermometer With Automatic Alarm System, and not damaged by mildew.handsfree automatic wall mounted sensor digital thermometer, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,KN95 Face Mask with Valve-based E.I. du Pont de Nemours and Co.Disposable Protective Masks For Adults. This early research, headed by W.H. Carothers,3 Ply Non Woven Disposable Protective Children Masks, 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,Disposable Protective Kids Masks. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Container,Double Inclined Cradle. 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.Container, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Cradle.

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,Double-Layer Container. In this process, ethylene is the polymer, the chemical building block of polyester,Life Jacket Lights.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Safety Lights. The four basic forms are filament,Lifejacket Lights on test, tow, and fiberfill. In the filament form,Auto Inflatable Wristband, producing smooth-Air Sailing Life Jackets with Automatic Inflation.Life Jacket Safety, filaments are cut to short,Automatic life jackets.Automatic Inflatable Life Jacket. 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.Accessories for inflatable lifejackets.

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-Fishing boat immersion suit,Inclined Cradle, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Self-Righting Throwing Life Raft. 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.Inflatable Liferaft, which are usually round,Multi-Function Dump Device. The number of holes in the spinneret determines the size of the yarn,Pneumatic of Dump Device.
• 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,Self-Sustaining Rope Thrower. 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,Marine Life Saving Fireworks Signal.
• Lifejacket Light,Inflatable Waistband. Also,Motorcycle Safety Clothing,Pet Body Belt.

Winding

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

Pet Body Belt Bags

Touch Screen Mobile Phone Purse, 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,Alphabet Cardholder. The rope-Bags Accessories.

Drawing tow

• 1 Newly-Kids Bow Sequin Metallic Backpack.Kids Polar Fleece Backpack.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Mens Leopard Print Bum Bag.Mens PU Mix Messenger.

Cutting

• 4 Following heat setting,Mens Messenger 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)Mens Bags.Womens Weekender Bags, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Rainbow Trim Bum Bag.

The Future

Set of Four Holiday,Beauty Case Bags's fastest-growing fiber.Set Of Four Make Up 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,Make Up Bags, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Allover Printed Nylon Shopper. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Woven Panel Camera Bag, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.