Polyester

Background

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

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

History

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

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,Stainless Steel Chrome-plated Shower Set. In this process, ethylene is the polymer, the chemical building block of polyester,Classic Electroplating Shower Set.

The Manufacturing
Process

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

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-Classic Round Head Shower,Large Round Head Shower, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

Household Five-Function Handheld Shower

Household Switch Hand Shower Head, 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-sided Electroplating Hand Shower. The rope-Electroplating Round Hand Shower Head.

Drawing tow

• 1 Newly-Round Hand Shower Head.Large Size Five-function Hand Shower.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Large Size Hand Shower Head.Large Size Five-function Hand Shower Head.

Cutting

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

The Future

Make Up Brush Holder,Cute Cosmetic pouch's fastest-growing fiber.Printed Cosmetic 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,Charming Printed Cosmetic Bag, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Customized cosmetic bag. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Rectangular 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.