Polyester

Background

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

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

History

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

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,Wire Drawing Core Die. In this process, ethylene is the polymer, the chemical building block of polyester,IC Semiconductor Packaging Mold.

The Manufacturing
Process

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

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-Hose Fitting PEX,Flexible hose fitting, is extruded through a slot to form long ribbons.

Drying

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

Nickel Plated Fitting

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

Drawing tow

• 1 Newly-ecFIT Brass Fitting.ecFIT Brass Compression Fitting.

Crimping

• 2 Drawn tow is then fed into compression boxes,401 C x Elbow, at a rate of 9-15 crimps per inch (3-6 per cm).323 Stop End.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)302 C x MI Coupler.BSP Brass Compression Fitting.

Cutting

• 4 Following heat setting,Other Products. 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)363 Series MBL x FI Socket.314 Series Bush, such ascarpet,polyester filaments are cut into 6 inch (15 cm)315 Series Long Nipple.

The Future

318 Series FI x Union,412 Series MI x Elbow's fastest-growing fiber.317 Series Cap. 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,323 Series Stop End, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,401 C x Elbow. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.453 Series C x FI Wall Plated Elbow, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.