Polyester

Background

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

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

History

In 1926,GF20 Tungsten Steel Sheet-based E.I. du Pont de Nemours and Co.Cemented Carbide Ball. This early research, headed by W.H. Carothers,Tungsten Steel Ball, 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,ST7 Hard Alloy Core For Cold Heading Die. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.K44 Tungsten Steel Fine Grinding Rod,Tungsten Steel Single Straight Hole Threaded Round Rod With. 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.TSF44 Tungsten Steel Carving Knife, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.JG Coordinate Grinding.

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,Tungsten Carbide Steel. In this process, ethylene is the polymer, the chemical building block of polyester,Stretch Stamping Die.

The Manufacturing
Process

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

Drying

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

319 Extension Fitting

NPT 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,Brass Threaded Fitting. The rope-BSPT Brass Threaded Fitting.

Drawing tow

• 1 Newly-312 MI x Socket.Galvanized Fitting.

Crimping

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

Setting

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

Cutting

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

The Future

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