Polyester

Background

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

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

History

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

The Manufacturing
Process

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

Drying

• 3 After the polyester emerges from polymerization,Medical isolation gown. 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.Disposable Medical Isolation Clothing, which are usually round,Non-medical Protective Clothing. The number of holes in the spinneret determines the size of the yarn,Medical Protective Clothing.
• 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 Gown. 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,Medical 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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KN95 Face Mask with Valve, 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,Disposable Protective Masks For Adults. The rope-3 Ply Non Woven Disposable Protective Children Masks.

Drawing tow

• 1 Newly-Disposable Protective Kids Masks.Container.

Crimping

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

Setting

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

Cutting

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

The Future

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