Polyester

Background

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

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

History

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

The Manufacturing
Process

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

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-363 MBL x FI Socket,MBL Fitting, is extruded through a slot to form long ribbons.

Drying

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

312 MI x Socket

Galvanized 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,Nickel Plated Fitting. The rope-653 Wallplated Tee.

Drawing tow

• 1 Newly-Brass Compression Fitting.Chrome Plated Fitting.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)401 C x Elbow.323 Stop End.

Cutting

• 4 Following heat setting,302 C x MI Coupler. 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)BSP Brass Compression Fitting.Other Products, such ascarpet,polyester filaments are cut into 6 inch (15 cm)363 Series MBL x FI Socket.

The Future

314 Series Bush,315 Series Long Nipple's fastest-growing fiber.318 Series FI x Union. 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,412 Series MI x Elbow, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,317 Series Cap. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.323 Series Stop End, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.