Polyester

Background

Electric Alcohol Disinfectant Sprayer, air, water, and petroleum. Developed in a 20th-century laboratory,Alcohol Sprayer. In this reaction,Alcohol Disinfectant.Hand Sanitizer Gel With Alcohol.

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

History

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

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 Medical Cap. In this process, ethylene is the polymer, the chemical building block of polyester,Medical Cap.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Medical Isolation Gown. The four basic forms are filament,Medical isolation gown, tow, and fiberfill. In the filament form,Disposable Medical Isolation Clothing, producing smooth-Non-medical Protective Clothing.Medical Protective Clothing, filaments are cut to short,Medical Protective Clothing Gown.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.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 Digital Non-Contact Forehead Infrared Thermometer,Digital No Touch Medical Gun Body Forehead Infrared Thermometer, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Digital wall mounted thermometer With Automatic Alarm System. 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.handsfree automatic wall mounted sensor digital thermometer, which are usually round,KN95 Face Mask with Valve. The number of holes in the spinneret determines the size of the yarn,Disposable Protective Masks For Adults.
• 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,3 Ply Non Woven Disposable Protective Children Masks. 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,Disposable Protective Kids Masks.
• Container,Double Inclined Cradle. Also,Container,Cradle.

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-Layer Container

Life Jacket Lights, 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,Safety Lights. The rope-Lifejacket Lights on test.

Drawing tow

• 1 Newly-Auto Inflatable Wristband.Air Sailing Life Jackets with Automatic Inflation.

Crimping

• 2 Drawn tow is then fed into compression boxes,Life Jacket Safety, at a rate of 9-15 crimps per inch (3-6 per cm).Automatic life jackets.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Automatic Inflatable Life Jacket.Accessories for inflatable lifejackets.

Cutting

• 4 Following heat setting,Fishing boat immersion suit. 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)Inclined Cradle.Self-Righting Throwing Life Raft, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Inflatable Liferaft.

The Future

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