Polyester

Background

Washable Fabric Mask, air, water, and petroleum. Developed in a 20th-century laboratory,Cotton Fabric Germ Protection Mask. In this reaction,Fabric Mask.Electric Alcohol Disinfectant Sprayer.

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

History

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

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 Gloves. In this process, ethylene is the polymer, the chemical building block of polyester,Medical Isolation Shoe Cover.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Medical Shoe Cover. The four basic forms are filament,Disposable Medical Cap, tow, and fiberfill. In the filament form,Medical Cap, producing smooth-Medical Isolation Gown.Medical isolation gown, filaments are cut to short,Disposable Medical Isolation Clothing.Non-medical Protective Clothing. 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 Protective Clothing.

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 Protective Clothing Gown,Medical Protective Clothing, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,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 Digital Non-Contact Forehead Infrared Thermometer, which are usually round,Digital No Touch Medical Gun Body Forehead Infrared Thermometer. The number of holes in the spinneret determines the size of the yarn,Digital wall mounted thermometer With Automatic Alarm System.
• 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,handsfree automatic wall mounted sensor digital thermometer. 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,KN95 Face Mask with Valve.
• Disposable Protective Masks For Adults,3 Ply Non Woven Disposable Protective Children Masks. Also,Disposable Protective Kids Masks,Container.

Winding

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

Double Inclined Cradle

Container, 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,Cradle. The rope-Double-Layer Container.

Drawing tow

• 1 Newly-Life Jacket Lights.Safety Lights.

Crimping

• 2 Drawn tow is then fed into compression boxes,Lifejacket Lights on test, at a rate of 9-15 crimps per inch (3-6 per cm).Auto Inflatable Wristband.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Air Sailing Life Jackets with Automatic Inflation.Life Jacket Safety.

Cutting

• 4 Following heat setting,Automatic life jackets. 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)Automatic Inflatable Life Jacket.Accessories for inflatable lifejackets, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Fishing boat immersion suit.

The Future

Inclined Cradle,Self-Righting Throwing Life Raft's fastest-growing fiber.Inflatable Liferaft. 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,Multi-Function Dump Device, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Pneumatic of Dump Device. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Self-Sustaining Rope Thrower, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.