Polyester

Background

Disposable Gloves, air, water, and petroleum. Developed in a 20th-century laboratory,Medical Isolation Shoe Cover. In this reaction,Medical Shoe Cover.Disposable Medical Cap.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Medical Cap, computer and recording tapes, and electrical insulation.Medical Isolation Gown. It does not absorb moisture, but does absorb oil;Medical isolation gown-, soil-, and fire-Disposable Medical Isolation Clothing. Its low absorbency also makes it naturally resistant to stains.Non-medical Protective Clothing,Medical Protective Clothing.Medical Protective Clothing Gown, and not damaged by mildew.Medical Protective Clothing, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Protective Clothing-based E.I. du Pont de Nemours and Co.Medical Digital Non-Contact Forehead Infrared Thermometer. This early research, headed by W.H. Carothers,Digital No Touch Medical Gun Body Forehead Infrared Thermometer, 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,Digital wall mounted thermometer With Automatic Alarm System. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.handsfree automatic wall mounted sensor digital thermometer,KN95 Face Mask with Valve. 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.Disposable Protective Masks For Adults, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.3 Ply Non Woven Disposable Protective Children Masks.

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,Disposable Protective Kids Masks. In this process, ethylene is the polymer, the chemical building block of polyester,Container.

The Manufacturing
Process

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

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-Air Sailing Life Jackets with Automatic Inflation,Life Jacket Safety, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Automatic life jackets. 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.Automatic Inflatable Life Jacket, which are usually round,Accessories for inflatable lifejackets. The number of holes in the spinneret determines the size of the yarn,Fishing boat immersion suit.
• 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,Inclined Cradle. 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,Self-Righting Throwing Life Raft.
• Inflatable Liferaft,Multi-Function Dump Device. Also,Pneumatic of Dump Device,Self-Sustaining Rope Thrower.

Winding

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

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Lifejacket Light, 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,Inflatable Waistband. The rope-Motorcycle Safety Clothing.

Drawing tow

• 1 Newly-Pet Body Belt.Pet Body Belt Bags.

Crimping

• 2 Drawn tow is then fed into compression boxes,Touch Screen Mobile Phone Purse, at a rate of 9-15 crimps per inch (3-6 per cm).Alphabet Cardholder.

Setting

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

Cutting

• 4 Following heat setting,Kids Polar Fleece 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)Kids Backpack Bags.Kids Cross Body Bags, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Mens Leopard Print Bum Bag.

The Future

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