Polyester

Background

Disposable Nitrile Gloves, air, water, and petroleum. Developed in a 20th-century laboratory,Disposable PVC Gloves. In this reaction,Latex Gloves.Disposable PE Gloves.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Disposable PE Gloves With Block, computer and recording tapes, and electrical insulation.Disposable Gloves. It does not absorb moisture, but does absorb oil;Medical Isolation Shoe Cover-, soil-, and fire-Medical Shoe Cover. Its low absorbency also makes it naturally resistant to stains.Disposable Medical Cap,Medical Cap.Medical Isolation Gown, and not damaged by mildew.Medical isolation gown, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Disposable Medical Isolation Clothing-based E.I. du Pont de Nemours and Co.Non-medical Protective Clothing. This early research, headed by W.H. Carothers,Medical Protective Clothing, 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 Protective Clothing Gown. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Medical Protective Clothing,Protective Clothing. 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 Digital Non-Contact Forehead Infrared Thermometer, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Digital No Touch Medical Gun Body Forehead Infrared Thermometer.

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,Digital wall mounted thermometer With Automatic Alarm System. In this process, ethylene is the polymer, the chemical building block of polyester,handsfree automatic wall mounted sensor digital thermometer.

The Manufacturing
Process

Polyester is manufactured by one of several methods.KN95 Face Mask with Valve. The four basic forms are filament,Disposable Protective Masks For Adults, tow, and fiberfill. In the filament form,3 Ply Non Woven Disposable Protective Children Masks, producing smooth-Disposable Protective Kids Masks.Container, filaments are cut to short,Double Inclined Cradle.Container. 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.Cradle.

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-Double-Layer Container,Life Jacket Lights, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Safety Lights. 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.Lifejacket Lights on test, which are usually round,Auto Inflatable Wristband. The number of holes in the spinneret determines the size of the yarn,Air Sailing Life Jackets with Automatic Inflation.
• 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,Life Jacket Safety. 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,Automatic life jackets.
• Automatic Inflatable Life Jacket,Accessories for inflatable lifejackets. Also,Fishing boat immersion suit,Inclined Cradle.

Winding

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

Self-Righting Throwing Life Raft

Inflatable Liferaft, 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,Multi-Function Dump Device. The rope-Pneumatic of Dump Device.

Drawing tow

• 1 Newly-Self-Sustaining Rope Thrower.Marine Life Saving Fireworks Signal.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Motorcycle Safety Clothing.Pet Body Belt.

Cutting

• 4 Following heat setting,Pet Body Belt Bags. 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)Touch Screen Mobile Phone Purse.Alphabet Cardholder, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Bags Accessories.

The Future

Kids Bow Sequin Metallic Backpack,Kids Polar Fleece Backpack's fastest-growing fiber.Kids Backpack Bags. 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,Kids Cross Body Bags, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Mens Leopard Print Bum Bag. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Mens PU Mix Messenger, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.