Polyester

Background

Tungsten Steel Needle Gauge, air, water, and petroleum. Developed in a 20th-century laboratory,Tungsten Steel Measuring Tool. In this reaction,Tungsten Steel Plug Gauge.Non-magnetic Tungsten Steel.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Carbide Safety Hammer, computer and recording tapes, and electrical insulation.KF12 Tungsten Steel Round Bar for High Speed Stamping. It does not absorb moisture, but does absorb oil;EDM Tungsten Steel Sheet Material-, soil-, and fire-GF20 Tungsten Steel Sheet. Its low absorbency also makes it naturally resistant to stains.Cemented Carbide Ball,Tungsten Steel Ball.ST7 Hard Alloy Core For Cold Heading Die, and not damaged by mildew.K44 Tungsten Steel Fine Grinding Rod, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Tungsten Steel Single Straight Hole Threaded Round Rod With-based E.I. du Pont de Nemours and Co.TSF44 Tungsten Steel Carving Knife. This early research, headed by W.H. Carothers,JG Coordinate Grinding, 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 Carbide Steel. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Stretch Stamping Die,Powder Metallurgy Mold. 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.Motor Progressive Die, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Stainless Steel LED Mould.

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,Terminal Stamping Die. In this process, ethylene is the polymer, the chemical building block of polyester,Wire Drawing Core Die.

The Manufacturing
Process

Polyester is manufactured by one of several methods.IC Semiconductor Packaging Mold. The four basic forms are filament,Lead Frame Mold, tow, and fiberfill. In the filament form,Lithium Battery Mould, producing smooth-Cemented Carbide Mould.Brass Clamp for pipe, filaments are cut to short,BSPT Brass Compression Fitting.462 MBL x MI Elbow. 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.363 MBL x FI Socket.

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-MBL Fitting,Hose Fitting PEX, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Flexible hose fitting. 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.319 Extension Fitting, which are usually round,Brass Fitting. The number of holes in the spinneret determines the size of the yarn,414 MI x FI Elbow.
• 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,ecFIT Brass Threaded 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,319 Extension Fitting.
• NPT Brass Threaded Fitting,Brass Threaded Fitting. Also,BSPT Brass Threaded Fitting,312 MI x Socket.

Winding

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

Galvanized Fitting

Nickel Plated 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,653 Wallplated Tee. The rope-Brass Compression Fitting.

Drawing tow

• 1 Newly-Chrome Plated Fitting.ecFIT Brass Fitting.

Crimping

• 2 Drawn tow is then fed into compression boxes,ecFIT Brass Compression Fitting, at a rate of 9-15 crimps per inch (3-6 per cm).401 C x Elbow.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)323 Stop End.302 C x MI Coupler.

Cutting

• 4 Following heat setting,BSP Brass Compression 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)Other Products.363 Series MBL x FI Socket, such ascarpet,polyester filaments are cut into 6 inch (15 cm)314 Series Bush.

The Future

315 Series Long Nipple,318 Series FI x Union's fastest-growing fiber.412 Series MI x Elbow. 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,317 Series Cap, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,323 Series Stop End. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.401 C x Elbow, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.