Polyester

Background

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

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

History

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

The Manufacturing
Process

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

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-BSPT Brass Compression Fitting,462 MBL x MI Elbow, is extruded through a slot to form long ribbons.

Drying

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

Brass Threaded Fitting

BSPT 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,312 MI x Socket. The rope-Galvanized Fitting.

Drawing tow

• 1 Newly-Nickel Plated Fitting.653 Wallplated Tee.

Crimping

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

Setting

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

Cutting

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

The Future

Other Products,363 Series MBL x FI Socket's fastest-growing fiber.314 Series Bush. 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,315 Series Long Nipple, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,318 Series FI x Union. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.412 Series MI 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.