Polyester

Background

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

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

History

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

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,Shower Rail. In this process, ethylene is the polymer, the chemical building block of polyester,Stainless Steel Polished Shower Hose.

The Manufacturing
Process

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

Drying

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

Large Size Five-function Hand Shower

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

Drawing tow

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

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Toiletry Bag.Make Up Brush Holder.

Cutting

• 4 Following heat setting,Cute Cosmetic pouch. 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)Printed Cosmetic Bag.Charming Printed Cosmetic Bag, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Customized cosmetic bag.

The Future

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