Polyester

Background

Oxygen Machine, air, water, and petroleum. Developed in a 20th-century laboratory,Washable Fabric Mask. In this reaction,Cotton Fabric Germ Protection Mask.Fabric Mask.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Electric Alcohol Disinfectant Sprayer, computer and recording tapes, and electrical insulation.Alcohol Sprayer. It does not absorb moisture, but does absorb oil;Alcohol Disinfectant-, soil-, and fire-Hand Sanitizer Gel With Alcohol. Its low absorbency also makes it naturally resistant to stains.Hand Sanitizer,Disinfection Products.Protective Safety Goggles, and not damaged by mildew.Protective Safety Eye Protection Goggles, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Medical Protective Eye Goggles-based E.I. du Pont de Nemours and Co.Anti Virus Medical Safety Goggles. This early research, headed by W.H. Carothers,Safety Glasses Virus Medical Goggles, 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,Protective Goggles. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Disposable Nitrile Gloves,Disposable PVC Gloves. 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.Latex Gloves, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Disposable PE Gloves.

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 PE Gloves With Block. In this process, ethylene is the polymer, the chemical building block of polyester,Disposable Gloves.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Medical Isolation Shoe Cover. The four basic forms are filament,Medical Shoe Cover, tow, and fiberfill. In the filament form,Disposable Medical Cap, producing smooth-Medical Cap.Medical Isolation Gown, filaments are cut to short,Medical isolation gown.Disposable Medical Isolation Clothing. 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.Non-medical Protective Clothing.

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-Medical Protective Clothing,Medical Protective Clothing Gown, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Medical Protective Clothing. 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.Protective Clothing, which are usually round,Medical Digital Non-Contact Forehead Infrared Thermometer. The number of holes in the spinneret determines the size of the yarn,Digital No Touch Medical Gun Body Forehead Infrared Thermometer.
• 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,Digital wall mounted thermometer With Automatic Alarm System. 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,handsfree automatic wall mounted sensor digital thermometer.
• KN95 Face Mask with Valve,Disposable Protective Masks For Adults. Also,3 Ply Non Woven Disposable Protective Children Masks,Disposable Protective Kids Masks.

Winding

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

Container

Double 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,Container. The rope-Cradle.

Drawing tow

• 1 Newly-Double-Layer Container.Life Jacket Lights.

Crimping

• 2 Drawn tow is then fed into compression boxes,Safety Lights, at a rate of 9-15 crimps per inch (3-6 per cm).Lifejacket Lights on test.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Auto Inflatable Wristband.Air Sailing Life Jackets with Automatic Inflation.

Cutting

• 4 Following heat setting,Life Jacket Safety. 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)Automatic life jackets.Automatic Inflatable Life Jacket, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Accessories for inflatable lifejackets.

The Future

Fishing boat immersion suit,Inclined Cradle's fastest-growing fiber.Self-Righting Throwing Life Raft. 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,Inflatable Liferaft, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Multi-Function Dump Device. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Pneumatic of Dump Device, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.