Polyester

Background

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

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

History

In 1926,Medical Shoe Cover-based E.I. du Pont de Nemours and Co.Disposable Medical Cap. This early research, headed by W.H. Carothers,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 Isolation Gown. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Medical isolation gown,Disposable Medical Isolation 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.Non-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.

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

The Manufacturing
Process

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

Drying

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

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 life jackets

Automatic Inflatable Life Jacket, 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,Accessories for inflatable lifejackets. The rope-Fishing boat immersion suit.

Drawing tow

• 1 Newly-Inclined Cradle.Self-Righting Throwing Life Raft.

Crimping

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

Setting

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

Cutting

• 4 Following heat setting,Marine Life Saving Fireworks Signal. 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)Lifejacket Light.Inflatable Waistband, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Motorcycle Safety Clothing.

The Future

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