Polyester

Background

Fully Automatic Blood Pressure Measure（Sphygmomanometers） With Spo2 Measure Function, air, water, and petroleum. Developed in a 20th-century laboratory,Infra-red Ear Thermometer With Fever Alarm. In this reaction,Infra-red Ear Thermometer With Switchable Dual Scale.Character Digital Thermometer.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Digital Thermometer With Soft Tip, computer and recording tapes, and electrical insulation.Digital Thermometers. It does not absorb moisture, but does absorb oil;Figertip Pulse Oximeter-, soil-, and fire-Medical Oxygen Concentrator. Its low absorbency also makes it naturally resistant to stains.Neoprene Rubber O Rings,Yellow Modified PTFE Gasket Sheet with silica filled.Type D Flange Insulation Gasket, and not damaged by mildew.Fluorine Rubber Gaskets, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Styrene-Butadiene Rubber Gaskets-based E.I. du Pont de Nemours and Co.Nitrile Rubber Gaskets. This early research, headed by W.H. Carothers,Asbestos Gasket Sheet, 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,flange Isolation gasket kits. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Insulating Flange Kits,Flange Insulation Kit Distributor. 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.Flange Insulation Gasket Kit, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Corrugated Graphite Tapes.

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,Expanded PTFE Joint Sealant Roll Tape. In this process, ethylene is the polymer, the chemical building block of polyester,Expanded PTFE joint Sealant Spool.

The Manufacturing
Process

Polyester is manufactured by one of several methods.PTFE Thread Sealant Tapes. The four basic forms are filament,PTFE Sealant Tape, tow, and fiberfill. In the filament form,NBR Rubber O Rings, producing smooth-Rubber O Rings.Black Natural Rubber Gasket, filaments are cut to short,Non-Asbestos Ring Flange Gaskets.Non Asbestos Ring Gasket. 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.Modified PTFE Gasket.

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-Solid Copper Gasket,Kammprofile Gasket with Integral Outer Ring, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Corrugated Jacketed Gasket. 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.Corrugated Graphite Gasket, which are usually round,Corrugated Gasket. The number of holes in the spinneret determines the size of the yarn,Corrugated Metal Gaskets.
• 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,Standard Spiral Wound Gasket. 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,Inner & Outer Ring Of SWG.
• Spiral Wound Gaskets,55-inch multimedia advertising player. Also,43-inch wall-mounted advertising player,55-inch Vertical Double-sided Window Advertising Machine.

Winding

• 8 After the polyester yarn is drawn, it is wound on large bobbins or flat-wound packages, ready to be woven into material.

32-inch Wall-mounted Online Advertising Machine

43-inch Wall-mounted Online Advertising Machine, 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,37-inch Bar Screen. The rope-88-inch Bar Screen.

Drawing tow

• 1 Newly-55-inch Infrared Touch Flagship Conference All-in-one Machine.65-inch Infrared Touch Flagship Conference All-in-one Machine.

Crimping

• 2 Drawn tow is then fed into compression boxes,75-inch Infrared Touch Flagship Conference All-in-one Machine, at a rate of 9-15 crimps per inch (3-6 per cm).100-inch Infrared Touch Flagship Conference All-in-one Machine.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)75-inch Infrared Touch Ordinary Conference All-in-one Machine.86-inch Infrared Touch Ordinary Conference All-in-one Machine.

Cutting

• 4 Following heat setting,All-in-one Series. 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)15-inch Open Frame Infrared Touch Monitor.23.6-inch Open Frame Infrared Touch Monitor, such ascarpet,polyester filaments are cut into 6 inch (15 cm)12.1-inch Open Capacitive Touch Display.

The Future

10.1-inch Open Capacitive Touch Display,7-inch Open Capacitive Touch Display's fastest-growing fiber.17-inch Open Capacitive Touch Display. 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,18.5-inch Open Capacitive Touch Display, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,23.8-inch Open Capacitive Touch Display. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.32-inch Open Capacitive Touch Display, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.