Polyester

Background

Medical Protective Eye Goggles, air, water, and petroleum. Developed in a 20th-century laboratory,Anti Virus Medical Safety Goggles. In this reaction,Safety Glasses Virus Medical Goggles.Protective Goggles.

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

History

In 1926,Disposable Medical Cap-based E.I. du Pont de Nemours and Co.Medical Cap. This early research, headed by W.H. Carothers,Medical Isolation Gown, 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 gown. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Disposable Medical Isolation Clothing,Non-medical Protective Clothing. 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 Protective Clothing, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Medical Protective Clothing 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 Protective Clothing. In this process, ethylene is the polymer, the chemical building block of polyester,Protective Clothing.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Medical Digital Non-Contact Forehead Infrared Thermometer. The four basic forms are filament,Digital No Touch Medical Gun Body Forehead Infrared Thermometer, tow, and fiberfill. In the filament form,Digital wall mounted thermometer With Automatic Alarm System, producing smooth-handsfree automatic wall mounted sensor digital thermometer.KN95 Face Mask with Valve, filaments are cut to short,Disposable Protective Masks For Adults.3 Ply Non Woven Disposable Protective Children Masks. 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.Disposable Protective Kids Masks.

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-Container,Double Inclined Cradle, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Container. 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.Cradle, which are usually round,Double-Layer Container. The number of holes in the spinneret determines the size of the yarn,Life Jacket Lights.
• 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,Safety Lights. 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,Lifejacket Lights on test.
• Auto Inflatable Wristband,Air Sailing Life Jackets with Automatic Inflation. Also,Life Jacket Safety,Automatic life jackets.

Winding

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

Automatic Inflatable Life Jacket

Accessories for inflatable lifejackets, 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,Fishing boat immersion suit. The rope-Inclined Cradle.

Drawing tow

• 1 Newly-Self-Righting Throwing Life Raft.Inflatable Liferaft.

Crimping

• 2 Drawn tow is then fed into compression boxes,Multi-Function Dump Device, at a rate of 9-15 crimps per inch (3-6 per cm).Pneumatic of Dump Device.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Self-Sustaining Rope Thrower.Marine Life Saving Fireworks Signal.

Cutting

• 4 Following heat setting,Lifejacket Light. 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)Inflatable Waistband.Motorcycle Safety Clothing, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Pet Body Belt.

The Future

Pet Body Belt Bags,Touch Screen Mobile Phone Purse's fastest-growing fiber.Alphabet Cardholder. 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,Bags Accessories, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Kids Bow Sequin Metallic Backpack. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Kids Polar Fleece Backpack, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.