Polyester

Background

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

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

History

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

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

The Manufacturing
Process

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

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,Disposable Medical Isolation Clothing, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Non-medical Protective 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.Medical Protective Clothing, which are usually round,Medical Protective Clothing Gown. 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,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,Medical Digital Non-Contact Forehead Infrared Thermometer.
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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.

Disposable Protective Masks For Adults

3 Ply Non Woven Disposable Protective Children Masks, 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 Kids Masks. The rope-Container.

Drawing tow

• 1 Newly-Double Inclined Cradle.Container.

Crimping

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

Setting

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

Cutting

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

The Future

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