Polyester

Background

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

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

History

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

The Manufacturing
Process

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

Drying

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

ABS Plastic Five-Function Hand Shower

Household Five-Function Handheld 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 Switch Hand Shower Head. The rope-Double-sided Electroplating Hand Shower.

Drawing tow

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

Crimping

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

Setting

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

Cutting

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

The Future

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