Polyester

Background

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

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

History

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

The Manufacturing
Process

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

Drying

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

Double-sided Electroplating 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,Electroplating Round Hand Shower Head. The rope-Round Hand Shower Head.

Drawing tow

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

Crimping

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

Setting

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

Cutting

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

The Future

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