Polyester

Background

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

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

History

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

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

The Manufacturing
Process

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

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-Digital No Touch Medical Gun Body Forehead Infrared Thermometer,Digital wall mounted thermometer With Automatic Alarm System, is extruded through a slot to form long ribbons.

Drying

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

Life Jacket Lights

Safety 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,Lifejacket Lights on test. The rope-Auto Inflatable Wristband.

Drawing tow

• 1 Newly-Air Sailing Life Jackets with Automatic Inflation.Life Jacket Safety.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Accessories for inflatable lifejackets.Fishing boat immersion suit.

Cutting

• 4 Following heat setting,Inclined Cradle. 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)Self-Righting Throwing Life Raft.Inflatable Liferaft, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Multi-Function Dump Device.

The Future

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