Polyester

Background

Zigzag Cotton, air, water, and petroleum. Developed in a 20th-century laboratory,Cotton Roll. In this reaction,Medical Cotton.Gauze Balls.

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

History

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

The Manufacturing
Process

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

Drying

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

Double-sided Electroplating Hand Shower

Electroplating Round 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,Round Hand Shower Head. The rope-Large Size Five-function Hand Shower.

Drawing tow

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

Crimping

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

Setting

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

Cutting

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

The Future

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