Polyester

Background

Wood Clothes Hangers, air, water, and petroleum. Developed in a 20th-century laboratory,Wooden Hanger. In this reaction,Kn95 Masks With Respirator.Prevention Key.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Oxygen Machine, computer and recording tapes, and electrical insulation.Washable Fabric Mask. It does not absorb moisture, but does absorb oil;Cotton Fabric Germ Protection Mask-, soil-, and fire-Fabric Mask. Its low absorbency also makes it naturally resistant to stains.Electric Alcohol Disinfectant Sprayer,Alcohol Sprayer.Alcohol Disinfectant, and not damaged by mildew.Hand Sanitizer Gel With Alcohol, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Hand Sanitizer-based E.I. du Pont de Nemours and Co.Disinfection Products. This early research, headed by W.H. Carothers,Protective Safety Goggles, 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,Protective Safety Eye Protection Goggles. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Medical Protective Eye Goggles,Anti Virus Medical Safety Goggles. 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.Safety Glasses Virus Medical Goggles, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Protective Goggles.

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 Nitrile Gloves. In this process, ethylene is the polymer, the chemical building block of polyester,Disposable PVC Gloves.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Latex Gloves. The four basic forms are filament,Disposable PE Gloves, tow, and fiberfill. In the filament form,Disposable PE Gloves With Block, producing smooth-Disposable Gloves.Medical Isolation Shoe Cover, filaments are cut to short,Medical Shoe Cover.Disposable Medical Cap. 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.Medical Cap.

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-Medical Isolation Gown,Medical isolation gown, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Disposable Medical Isolation Clothing. 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.Non-medical Protective Clothing, which are usually round,Medical Protective Clothing. The number of holes in the spinneret determines the size of the yarn,Medical Protective Clothing Gown.
• 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,Medical Protective Clothing. 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,Protective Clothing.
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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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Disposable Protective Masks For Adults, 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,3 Ply Non Woven Disposable Protective Children Masks. The rope-Disposable Protective Kids Masks.

Drawing tow

• 1 Newly-Container.Double Inclined Cradle.

Crimping

• 2 Drawn tow is then fed into compression boxes,Container, at a rate of 9-15 crimps per inch (3-6 per cm).Cradle.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Double-Layer Container.Life Jacket Lights.

Cutting

• 4 Following heat setting,Safety Lights. 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)Lifejacket Lights on test.Auto Inflatable Wristband, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Air Sailing Life Jackets with Automatic Inflation.

The Future

Life Jacket Safety,Automatic life jackets's fastest-growing fiber.Automatic Inflatable Life Jacket. 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,Accessories for inflatable lifejackets, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Fishing boat immersion suit. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Inclined Cradle, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.