Polyester

Background

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

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

History

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

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,Medical Protective Clothing Gown.

The Manufacturing
Process

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

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-3 Ply Non Woven Disposable Protective Children Masks,Disposable Protective Kids Masks, 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.Double Inclined Cradle, which are usually round,Container. The number of holes in the spinneret determines the size of the yarn,Cradle.
• 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-Layer Container. 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,Life Jacket Lights.
• Safety Lights,Lifejacket Lights on test. Also,Auto Inflatable Wristband,Air Sailing Life Jackets with Automatic Inflation.

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 Safety

Automatic life jackets, 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,Automatic Inflatable Life Jacket. The rope-Accessories for inflatable lifejackets.

Drawing tow

• 1 Newly-Fishing boat immersion suit.Inclined Cradle.

Crimping

• 2 Drawn tow is then fed into compression boxes,Self-Righting Throwing Life Raft, at a rate of 9-15 crimps per inch (3-6 per cm).Inflatable Liferaft.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Multi-Function Dump Device.Pneumatic of Dump Device.

Cutting

• 4 Following heat setting,Self-Sustaining Rope Thrower. 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)Marine Life Saving Fireworks Signal.Lifejacket Light, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Inflatable Waistband.

The Future

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