Polyester

Background

Medical Cotton, air, water, and petroleum. Developed in a 20th-century laboratory,Gauze Balls. In this reaction,Lap Sponges.Urinary Catheter.

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

History

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

The Manufacturing
Process

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

Drying

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

Round Hand Shower Head

Large Size 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,Single Function Round Hand Shower Head. The rope-Electroplating Hand Shower Head.

Drawing tow

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

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Clear comsetic bag.Toiletry Bag.

Cutting

• 4 Following heat setting,Make Up Brush Holder. 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)Cute Cosmetic pouch.Printed Cosmetic Bag, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Charming Printed Cosmetic Bag.

The Future

Customized cosmetic bag,Rectangular Cosmetic Bag's fastest-growing fiber.Nylon mesh pouch promotion. 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,Velvet Makeup Pouch, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Travel beauty pouch. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Cosmetic makeup bag, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.