Polyester

Background

Tungsten Steel Slow Wire Processing, air, water, and petroleum. Developed in a 20th-century laboratory,Tungsten Steel Processing. In this reaction,Tungsten Steel Round Bar.Tungsten Steel Sheet.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Tungsten Steel Fine Grinding Rod, computer and recording tapes, and electrical insulation.Tungsten Steel Threading Hole Rod. It does not absorb moisture, but does absorb oil;Tungsten Steel Needle Gauge-, soil-, and fire-Tungsten Steel Measuring Tool. Its low absorbency also makes it naturally resistant to stains.Tungsten Steel Plug Gauge,Non-magnetic Tungsten Steel.Carbide Safety Hammer, and not damaged by mildew.KF12 Tungsten Steel Round Bar for High Speed Stamping, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,EDM Tungsten Steel Sheet Material-based E.I. du Pont de Nemours and Co.GF20 Tungsten Steel Sheet. This early research, headed by W.H. Carothers,Cemented Carbide Ball, 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,Tungsten Steel Ball. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.ST7 Hard Alloy Core For Cold Heading Die,K44 Tungsten Steel Fine Grinding Rod. 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.Tungsten Steel Single Straight Hole Threaded Round Rod With, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.TSF44 Tungsten Steel Carving Knife.

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,JG Coordinate Grinding. In this process, ethylene is the polymer, the chemical building block of polyester,Tungsten Carbide Steel.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Stretch Stamping Die. The four basic forms are filament,Powder Metallurgy Mold, tow, and fiberfill. In the filament form,Motor Progressive Die, producing smooth-Stainless Steel LED Mould.Terminal Stamping Die, filaments are cut to short,Wire Drawing Core Die.IC Semiconductor Packaging Mold. 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.Lead Frame Mold.

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-Lithium Battery Mould,Cemented Carbide Mould, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Brass Clamp for pipe. 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.BSPT Brass Compression Fitting, which are usually round,462 MBL x MI Elbow. The number of holes in the spinneret determines the size of the yarn,363 MBL x FI Socket.
• 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,MBL Fitting. 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,Hose Fitting PEX.
• Flexible hose fitting,319 Extension Fitting. Also,Brass Fitting,414 MI x FI Elbow.

Winding

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

ecFIT Brass Threaded Fitting

319 Extension Fitting, 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,NPT Brass Threaded Fitting. The rope-Brass Threaded Fitting.

Drawing tow

• 1 Newly-BSPT Brass Threaded Fitting.312 MI x Socket.

Crimping

• 2 Drawn tow is then fed into compression boxes,Galvanized Fitting, at a rate of 9-15 crimps per inch (3-6 per cm).Nickel Plated Fitting.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)653 Wallplated Tee.Brass Compression Fitting.

Cutting

• 4 Following heat setting,Chrome Plated Fitting. 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)ecFIT Brass Fitting.ecFIT Brass Compression Fitting, such ascarpet,polyester filaments are cut into 6 inch (15 cm)401 C x Elbow.

The Future

323 Stop End,302 C x MI Coupler's fastest-growing fiber.BSP Brass Compression Fitting. 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,Other Products, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,363 Series MBL x FI Socket. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.314 Series Bush, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.