Polyester

Background

Hand Sanitizer Gel With Alcohol, air, water, and petroleum. Developed in a 20th-century laboratory,Hand Sanitizer. In this reaction,Disinfection Products.Protective Safety Goggles.

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

History

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

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 gown. In this process, ethylene is the polymer, the chemical building block of polyester,Disposable Medical Isolation Clothing.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Non-medical Protective Clothing. The four basic forms are filament,Medical Protective Clothing, tow, and fiberfill. In the filament form,Medical Protective Clothing Gown, producing smooth-Medical Protective Clothing.Protective Clothing, filaments are cut to short,Medical Digital Non-Contact Forehead Infrared Thermometer.Digital No Touch Medical Gun Body Forehead Infrared Thermometer. 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.Digital wall mounted thermometer With Automatic Alarm System.

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-handsfree automatic wall mounted sensor digital thermometer,KN95 Face Mask with Valve, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Disposable Protective Masks For Adults. 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.3 Ply Non Woven Disposable Protective Children Masks, which are usually round,Disposable Protective Kids Masks. The number of holes in the spinneret determines the size of the yarn,Container.
• 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,Double Inclined Cradle. 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,Container.
• Cradle,Double-Layer Container. Also,Life Jacket Lights,Safety Lights.

Winding

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

Lifejacket Lights on test

Auto Inflatable Wristband, 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,Air Sailing Life Jackets with Automatic Inflation. The rope-Life Jacket Safety.

Drawing tow

• 1 Newly-Automatic life jackets.Automatic Inflatable Life Jacket.

Crimping

• 2 Drawn tow is then fed into compression boxes,Accessories for inflatable lifejackets, at a rate of 9-15 crimps per inch (3-6 per cm).Fishing boat immersion suit.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Inclined Cradle.Self-Righting Throwing Life Raft.

Cutting

• 4 Following heat setting,Inflatable Liferaft. 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)Multi-Function Dump Device.Pneumatic of Dump Device, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Self-Sustaining Rope Thrower.

The Future

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