Polyester

Background

Carbide Safety Hammer, air, water, and petroleum. Developed in a 20th-century laboratory,KF12 Tungsten Steel Round Bar for High Speed Stamping. In this reaction,EDM Tungsten Steel Sheet Material.GF20 Tungsten Steel Sheet.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Cemented Carbide Ball, computer and recording tapes, and electrical insulation.Tungsten Steel Ball. It does not absorb moisture, but does absorb oil;ST7 Hard Alloy Core For Cold Heading Die-, soil-, and fire-K44 Tungsten Steel Fine Grinding Rod. Its low absorbency also makes it naturally resistant to stains.Tungsten Steel Single Straight Hole Threaded Round Rod With,TSF44 Tungsten Steel Carving Knife.JG Coordinate Grinding, and not damaged by mildew.Tungsten Carbide Steel, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

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

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,Lithium Battery Mould. In this process, ethylene is the polymer, the chemical building block of polyester,Cemented Carbide Mould.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Brass Clamp for pipe. The four basic forms are filament,BSPT Brass Compression Fitting, tow, and fiberfill. In the filament form,462 MBL x MI Elbow, producing smooth-363 MBL x FI Socket.MBL Fitting, filaments are cut to short,Hose Fitting PEX.Flexible hose fitting. 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.319 Extension 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-Brass Fitting,414 MI x FI Elbow, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,ecFIT Brass Threaded 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,NPT Brass Threaded Fitting. The number of holes in the spinneret determines the size of the yarn,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,BSPT 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,312 MI x Socket.
• Galvanized Fitting,Nickel Plated Fitting. Also,653 Wallplated Tee,Brass Compression 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.

Chrome Plated Fitting

ecFIT Brass 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,ecFIT Brass Compression Fitting. The rope-401 C x Elbow.

Drawing tow

• 1 Newly-323 Stop End.302 C x MI Coupler.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)363 Series MBL x FI Socket.314 Series Bush.

Cutting

• 4 Following heat setting,315 Series Long Nipple. 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)318 Series FI x Union.412 Series MI x Elbow, such ascarpet,polyester filaments are cut into 6 inch (15 cm)317 Series Cap.

The Future

323 Series Stop End,401 C x Elbow's fastest-growing fiber.453 Series C x FI Wall Plated 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,601 Series C x Tee, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,684 Series C x FI Tee. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.All-stainless Kitchen Scissors, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.