Polyester

Background

Safety Glasses Virus Medical Goggles, air, water, and petroleum. Developed in a 20th-century laboratory,Protective Goggles. In this reaction,Disposable Nitrile Gloves.Disposable PVC Gloves.

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

History

In 1926,Medical Isolation Gown-based E.I. du Pont de Nemours and Co.Medical isolation gown. This early research, headed by W.H. Carothers,Disposable Medical Isolation Clothing, 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,Non-medical Protective Clothing. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Medical Protective Clothing,Medical Protective Clothing 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.Medical Protective Clothing, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.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 Digital Non-Contact Forehead Infrared Thermometer. In this process, ethylene is the polymer, the chemical building block of polyester,Digital No Touch Medical Gun Body Forehead Infrared Thermometer.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Digital wall mounted thermometer With Automatic Alarm System. The four basic forms are filament,handsfree automatic wall mounted sensor digital thermometer, tow, and fiberfill. In the filament form,KN95 Face Mask with Valve, producing smooth-Disposable Protective Masks For Adults.3 Ply Non Woven Disposable Protective Children Masks, filaments are cut to short,Disposable Protective Kids Masks.Container. 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.Double Inclined Cradle.

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,Cradle, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

Fishing boat immersion suit

Inclined Cradle, 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,Self-Righting Throwing Life Raft. The rope-Inflatable Liferaft.

Drawing tow

• 1 Newly-Multi-Function Dump Device.Pneumatic of Dump Device.

Crimping

• 2 Drawn tow is then fed into compression boxes,Self-Sustaining Rope Thrower, at a rate of 9-15 crimps per inch (3-6 per cm).Marine Life Saving Fireworks Signal.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Lifejacket Light.Inflatable Waistband.

Cutting

• 4 Following heat setting,Motorcycle Safety Clothing. 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)Pet Body Belt.Pet Body Belt Bags, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Touch Screen Mobile Phone Purse.

The Future

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