Polyester

Background

Tungsten Steel Round Bar, air, water, and petroleum. Developed in a 20th-century laboratory,Tungsten Steel Sheet. In this reaction,Tungsten Steel Fine Grinding Rod.Tungsten Steel Threading Hole Rod.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Tungsten Steel Needle Gauge, computer and recording tapes, and electrical insulation.Tungsten Steel Measuring Tool. It does not absorb moisture, but does absorb oil;Tungsten Steel Plug Gauge-, soil-, and fire-Non-magnetic Tungsten Steel. Its low absorbency also makes it naturally resistant to stains.Carbide Safety Hammer,KF12 Tungsten Steel Round Bar for High Speed Stamping.EDM Tungsten Steel Sheet Material, and not damaged by mildew.GF20 Tungsten Steel Sheet, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

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

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,Stretch Stamping Die. In this process, ethylene is the polymer, the chemical building block of polyester,Powder Metallurgy Mold.

The Manufacturing
Process

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

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-Brass Clamp for pipe,BSPT Brass Compression Fitting, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

NPT Brass Threaded Fitting

Brass Threaded 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,BSPT Brass Threaded Fitting. The rope-312 MI x Socket.

Drawing tow

• 1 Newly-Galvanized Fitting.Nickel Plated Fitting.

Crimping

• 2 Drawn tow is then fed into compression boxes,653 Wallplated Tee, at a rate of 9-15 crimps per inch (3-6 per cm).Brass Compression Fitting.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Chrome Plated Fitting.ecFIT Brass Fitting.

Cutting

• 4 Following heat setting,ecFIT 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)401 C x Elbow.323 Stop End, such ascarpet,polyester filaments are cut into 6 inch (15 cm)302 C x MI Coupler.

The Future

BSP Brass Compression Fitting,Other Products's fastest-growing fiber.363 Series MBL x FI Socket. 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,314 Series Bush, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,315 Series Long Nipple. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.318 Series FI x Union, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.