Polyester

Background

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

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

History

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

The Manufacturing
Process

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

Drying

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

Container

Cradle, 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,Double-Layer Container. The rope-Life Jacket Lights.

Drawing tow

• 1 Newly-Safety Lights.Lifejacket Lights on test.

Crimping

• 2 Drawn tow is then fed into compression boxes,Auto Inflatable Wristband, at a rate of 9-15 crimps per inch (3-6 per cm).Air Sailing Life Jackets with Automatic Inflation.

Setting

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

Cutting

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

The Future

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