Polyester

Background

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

Polyester is used in the manufacture of many products, including clothing, home furnishings,GF20 Tungsten Steel Sheet, computer and recording tapes, and electrical insulation.Cemented Carbide Ball. It does not absorb moisture, but does absorb oil;Tungsten Steel Ball-, soil-, and fire-ST7 Hard Alloy Core For Cold Heading Die. Its low absorbency also makes it naturally resistant to stains.K44 Tungsten Steel Fine Grinding Rod,Tungsten Steel Single Straight Hole Threaded Round Rod With.TSF44 Tungsten Steel Carving Knife, and not damaged by mildew.JG Coordinate Grinding, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

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

The Manufacturing
Process

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

Drying

• 3 After the polyester emerges from polymerization,414 MI x FI 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.ecFIT Brass Threaded Fitting, which are usually round,319 Extension Fitting. The number of holes in the spinneret determines the size of the yarn,NPT 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,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,BSPT Brass Threaded Fitting.
• 312 MI x Socket,Galvanized Fitting. Also,Nickel Plated Fitting,653 Wallplated Tee.

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 Compression Fitting

Chrome 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,ecFIT Brass Fitting. The rope-ecFIT Brass Compression Fitting.

Drawing tow

• 1 Newly-401 C x Elbow.323 Stop End.

Crimping

• 2 Drawn tow is then fed into compression boxes,302 C x MI Coupler, at a rate of 9-15 crimps per inch (3-6 per cm).BSP Brass Compression Fitting.

Setting

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

Cutting

• 4 Following heat setting,314 Series Bush. 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)315 Series Long Nipple.318 Series FI x Union, such ascarpet,polyester filaments are cut into 6 inch (15 cm)412 Series MI x Elbow.

The Future

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