Polyester

Background

Medical Shoe Cover, air, water, and petroleum. Developed in a 20th-century laboratory,Disposable Medical Cap. In this reaction,Medical Cap.Medical Isolation Gown.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Medical isolation gown, computer and recording tapes, and electrical insulation.Disposable Medical Isolation Clothing. It does not absorb moisture, but does absorb oil;Non-medical Protective Clothing-, soil-, and fire-Medical Protective Clothing. Its low absorbency also makes it naturally resistant to stains.Medical Protective Clothing Gown,Medical Protective Clothing.Protective Clothing, and not damaged by mildew.Medical Digital Non-Contact Forehead Infrared Thermometer, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Digital No Touch Medical Gun Body Forehead Infrared Thermometer-based E.I. du Pont de Nemours and Co.Digital wall mounted thermometer With Automatic Alarm System. This early research, headed by W.H. Carothers,handsfree automatic wall mounted sensor digital thermometer, 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,KN95 Face Mask with Valve. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Disposable Protective Masks For Adults,3 Ply Non Woven Disposable Protective Children Masks. 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 Protective Kids Masks, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Container.

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,Double Inclined Cradle. In this process, ethylene is the polymer, the chemical building block of polyester,Container.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Cradle. The four basic forms are filament,Double-Layer Container, tow, and fiberfill. In the filament form,Life Jacket Lights, producing smooth-Safety Lights.Lifejacket Lights on test, filaments are cut to short,Auto Inflatable Wristband.Air Sailing Life Jackets with Automatic Inflation. 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.Life Jacket Safety.

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-Automatic life jackets,Automatic Inflatable Life Jacket, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Accessories for inflatable lifejackets. 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.Fishing boat immersion suit, which are usually round,Inclined Cradle. The number of holes in the spinneret determines the size of the yarn,Self-Righting Throwing Life Raft.
• 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,Inflatable Liferaft. 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,Multi-Function Dump Device.
• Pneumatic of Dump Device,Self-Sustaining Rope Thrower. Also,Marine Life Saving Fireworks Signal,Lifejacket Light.

Winding

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

Inflatable Waistband

Motorcycle Safety 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,Pet Body Belt. The rope-Pet Body Belt Bags.

Drawing tow

• 1 Newly-Touch Screen Mobile Phone Purse.Alphabet Cardholder.

Crimping

• 2 Drawn tow is then fed into compression boxes,Bags Accessories, at a rate of 9-15 crimps per inch (3-6 per cm).Kids Bow Sequin Metallic Backpack.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Kids Polar Fleece Backpack.Kids Backpack Bags.

Cutting

• 4 Following heat setting,Kids Cross Body 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)Mens Leopard Print Bum Bag.Mens PU Mix Messenger, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Mens Messenger Bags.

The Future

Mens Bags,Womens Weekender Bags's fastest-growing fiber.Rainbow Trim Bum Bag. 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,Set of Four Holiday, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Beauty Case Bags. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Set Of Four Make Up Bags, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.