Polyester

Background

Hand Sanitizer, air, water, and petroleum. Developed in a 20th-century laboratory,Disinfection Products. In this reaction,Protective Safety Goggles.Protective Safety Eye Protection Goggles.

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

History

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

The Manufacturing
Process

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

Drying

• 3 After the polyester emerges from polymerization,3 Ply Non Woven Disposable Protective Children Masks. 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.Disposable Protective Kids Masks, which are usually round,Container. The number of holes in the spinneret determines the size of the yarn,Double Inclined 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,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,Cradle.
• Double-Layer Container,Life Jacket Lights. Also,Safety Lights,Lifejacket Lights on test.

Winding

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

Auto Inflatable Wristband

Air Sailing Life Jackets with Automatic Inflation, 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,Life Jacket Safety. The rope-Automatic life jackets.

Drawing tow

• 1 Newly-Automatic Inflatable Life Jacket.Accessories for inflatable lifejackets.

Crimping

• 2 Drawn tow is then fed into compression boxes,Fishing boat immersion suit, at a rate of 9-15 crimps per inch (3-6 per cm).Inclined Cradle.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Self-Righting Throwing Life Raft.Inflatable Liferaft.

Cutting

• 4 Following heat setting,Multi-Function Dump Device. 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)Pneumatic of Dump Device.Self-Sustaining Rope Thrower, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Marine Life Saving Fireworks Signal.

The Future

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