Polyester

Background

Crepe Bandage, air, water, and petroleum. Developed in a 20th-century laboratory,Plaster Of Paris Bandage. In this reaction,PBT Bandage.Cotton Wool Roll.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Zigzag Cotton, computer and recording tapes, and electrical insulation.Cotton Roll. It does not absorb moisture, but does absorb oil;Medical Cotton-, soil-, and fire-Gauze Balls. Its low absorbency also makes it naturally resistant to stains.Lap Sponges,Urinary Catheter.Urinary Leg Bag, and not damaged by mildew.Nebulizer Mask, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Venturi Mask-based E.I. du Pont de Nemours and Co.Resuscitator. This early research, headed by W.H. Carothers,Nelaton Catheter, 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,Oxygen Mask With Reservoir Bagen. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Rectal Tube,Silicone Laryngeal Mask. 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.Respiratory Care, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Shower Accessories.

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,Classic Shower Set. In this process, ethylene is the polymer, the chemical building block of polyester,Flat Shower Set.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Stainless Steel Chrome-plated Shower Set. The four basic forms are filament,Classic Electroplating Shower Set, tow, and fiberfill. In the filament form,Retractable Round Shower Rod Set, producing smooth-Round Shower Set.Round Shower Rail, filaments are cut to short,Shower Rail.Stainless Steel Polished Shower Hose. 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.S.S. Shower Hose.

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-Shower Hose,Ultra-thin Overhead Shower, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Classic Round Head Shower. 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.Large Round Head Shower, which are usually round,ABS Plastic Round Head Shower. The number of holes in the spinneret determines the size of the yarn,Classic Plating Overhead Shower.
• 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,Waterfall Head Shower. 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,Electroplating Square Head Shower.
• Yellow Square Head Shower,Temperature Control LED Shower Head. Also,LED Shower Head,Square Waterfall Small Top Shower Head.

Winding

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

Small Top Shower Head

ABS Plastic Five-Function Hand Shower, 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,Household Five-Function Handheld Shower. The rope-Household Switch Hand Shower Head.

Drawing tow

• 1 Newly-Double-sided Electroplating Hand Shower.Electroplating Round Hand Shower Head.

Crimping

• 2 Drawn tow is then fed into compression boxes,Round Hand Shower Head, at a rate of 9-15 crimps per inch (3-6 per cm).Large Size Five-function Hand Shower.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Single Function Round Hand Shower Head.Electroplating Hand Shower Head.

Cutting

• 4 Following heat setting,Large Size Hand Shower Head. 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)Large Size Five-function Hand Shower Head.Five-function Chrome Hand Shower, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Three-function Hand Shower Head.

The Future

Clear comsetic bag,Toiletry Bag's fastest-growing fiber.Make Up Brush Holder. 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,Cute Cosmetic pouch, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Printed Cosmetic Bag. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Charming Printed Cosmetic Bag, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.