Polyester

Background

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

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

History

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

The Manufacturing
Process

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

Drying

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

Disposable Protective Kids Masks

Container, 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,Double Inclined Cradle. The rope-Container.

Drawing tow

• 1 Newly-Cradle.Double-Layer Container.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Lifejacket Lights on test.Auto Inflatable Wristband.

Cutting

• 4 Following heat setting,Air Sailing Life Jackets with Automatic Inflation. 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)Life Jacket Safety.Automatic life jackets, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Automatic Inflatable Life Jacket.

The Future

Accessories for inflatable lifejackets,Fishing boat immersion suit's fastest-growing fiber.Inclined Cradle. 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,Self-Righting Throwing Life Raft, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Inflatable Liferaft. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Multi-Function 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.