Polyester

Background

Wooden Cloth Hanger Rack, air, water, and petroleum. Developed in a 20th-century laboratory,Luxury Antique Wooden Shirt Hanger. In this reaction,Wooden Hanger Anti Theft with Clips.Natural wood Pack Solid Wood Clothes Hangers.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Wood Clothes Hangers, computer and recording tapes, and electrical insulation.Wooden Hanger. It does not absorb moisture, but does absorb oil;Kn95 Masks With Respirator-, soil-, and fire-Prevention Key. Its low absorbency also makes it naturally resistant to stains.Oxygen Machine,Washable Fabric Mask.Cotton Fabric Germ Protection Mask, and not damaged by mildew.Fabric Mask, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Electric Alcohol Disinfectant Sprayer-based E.I. du Pont de Nemours and Co.Alcohol Sprayer. This early research, headed by W.H. Carothers,Alcohol Disinfectant, 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,Hand Sanitizer Gel With Alcohol. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Hand Sanitizer,Disinfection Products. 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.Protective Safety Goggles, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Protective Safety Eye Protection Goggles.

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 Eye Goggles. In this process, ethylene is the polymer, the chemical building block of polyester,Anti Virus Medical Safety Goggles.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Safety Glasses Virus Medical Goggles. The four basic forms are filament,Protective Goggles, tow, and fiberfill. In the filament form,Disposable Nitrile Gloves, producing smooth-Disposable PVC Gloves.Latex Gloves, filaments are cut to short,Disposable PE Gloves.Disposable PE Gloves With Block. 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 Gloves.

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 Isolation Shoe Cover,Medical Shoe Cover, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Disposable Medical Cap. 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.Medical Cap, which are usually round,Medical Isolation Gown. The number of holes in the spinneret determines the size of the yarn,Medical isolation gown.
• 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,Disposable Medical Isolation Clothing. 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,Non-medical Protective Clothing.
• Medical Protective Clothing,Medical Protective Clothing Gown. Also,Medical Protective Clothing,Protective Clothing.

Winding

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

Medical Digital Non-Contact Forehead Infrared Thermometer

Digital No Touch Medical Gun Body Forehead Infrared Thermometer, 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,Digital wall mounted thermometer With Automatic Alarm System. The rope-handsfree automatic wall mounted sensor digital thermometer.

Drawing tow

• 1 Newly-KN95 Face Mask with Valve.Disposable Protective Masks For Adults.

Crimping

• 2 Drawn tow is then fed into compression boxes,3 Ply Non Woven Disposable Protective Children Masks, at a rate of 9-15 crimps per inch (3-6 per cm).Disposable Protective Kids Masks.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Container.Double Inclined Cradle.

Cutting

• 4 Following heat setting,Container. 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)Cradle.Double-Layer Container, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Life Jacket Lights.

The Future

Safety Lights,Lifejacket Lights on test's fastest-growing fiber.Auto Inflatable Wristband. 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,Air Sailing Life Jackets with Automatic Inflation, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Life Jacket Safety. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Automatic life jackets, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.