Polyester

Background

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

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

History

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

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

The Manufacturing
Process

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

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

Drying

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

Winding

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

Lifejacket Light

Inflatable Waistband, 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,Motorcycle Safety Clothing. The rope-Pet Body Belt.

Drawing tow

• 1 Newly-Pet Body Belt Bags.Touch Screen Mobile Phone Purse.

Crimping

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

Setting

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

Cutting

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

The Future

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