Polyester

Background

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

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

History

In 1926,Digital wall mounted thermometer With Automatic Alarm System-based E.I. du Pont de Nemours and Co.handsfree automatic wall mounted sensor digital thermometer. This early research, headed by W.H. Carothers,KN95 Face Mask with Valve, 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 Masks For Adults. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.3 Ply Non Woven Disposable Protective Children Masks,Disposable Protective Kids Masks. 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.Double Inclined 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,Container. In this process, ethylene is the polymer, the chemical building block of polyester,Cradle.

The Manufacturing
Process

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

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-Automatic Inflatable Life Jacket,Accessories for inflatable lifejackets, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Fishing boat immersion suit. 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.Inclined Cradle, which are usually round,Self-Righting Throwing Life Raft. The number of holes in the spinneret determines the size of the yarn,Inflatable Liferaft.
• 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,Multi-Function Dump Device. 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,Pneumatic of Dump Device.
• Self-Sustaining Rope Thrower,Marine Life Saving Fireworks Signal. Also,Lifejacket Light,Inflatable Waistband.

Winding

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

Motorcycle Safety Clothing

Pet Body Belt, 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,Pet Body Belt Bags. The rope-Touch Screen Mobile Phone Purse.

Drawing tow

• 1 Newly-Alphabet Cardholder.Bags Accessories.

Crimping

• 2 Drawn tow is then fed into compression boxes,Kids Bow Sequin Metallic Backpack, at a rate of 9-15 crimps per inch (3-6 per cm).Kids Polar Fleece Backpack.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Kids Backpack Bags.Kids Cross Body Bags.

Cutting

• 4 Following heat setting,Mens Leopard Print Bum Bag. 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 PU Mix Messenger.Mens Messenger Bags, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Mens Bags.

The Future

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