Polyester

Background

Compressed Bag, air, water, and petroleum. Developed in a 20th-century laboratory,Display Plywood Clothes Hanger with Leopard Head. In this reaction,Wooden Cloth Hanger Rack.Luxury Antique Wooden Shirt Hanger.

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

History

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

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,Protective Safety Goggles. In this process, ethylene is the polymer, the chemical building block of polyester,Protective Safety Eye Protection Goggles.

The Manufacturing
Process

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

Drying

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

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 Protective Clothing

Protective Clothing, 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,Medical Digital Non-Contact Forehead Infrared Thermometer. The rope-Digital No Touch Medical Gun Body Forehead Infrared Thermometer.

Drawing tow

• 1 Newly-Digital wall mounted thermometer With Automatic Alarm System.handsfree automatic wall mounted sensor digital thermometer.

Crimping

• 2 Drawn tow is then fed into compression boxes,KN95 Face Mask with Valve, at a rate of 9-15 crimps per inch (3-6 per cm).Disposable Protective Masks For Adults.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)3 Ply Non Woven Disposable Protective Children Masks.Disposable Protective Kids Masks.

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)Double Inclined Cradle.Container, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Cradle.

The Future

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