Polyester

Background

RD50 Tungsten Steel Flat Needle, air, water, and petroleum. Developed in a 20th-century laboratory,KG7 Tungsten Steel Insert. In this reaction,SKD61 Division Tube.Tungsten Steel Notch Punch.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Son And Mother Punch, computer and recording tapes, and electrical insulation.Pulling Teeth And Punching Needles. It does not absorb moisture, but does absorb oil;SKD61 Division Needle-, soil-, and fire-PG Optical Grinding Processing. Its low absorbency also makes it naturally resistant to stains.Archie Oil Cutting Processing,Centerless Grinding Precision Machining.Precision Tungsten Steel EDM, and not damaged by mildew.Tungsten Steel Slow Wire Processing, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Tungsten Steel Processing-based E.I. du Pont de Nemours and Co.Tungsten Steel Round Bar. This early research, headed by W.H. Carothers,Tungsten Steel Sheet, 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 Fine Grinding Rod. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Tungsten Steel Threading Hole Rod,Tungsten Steel Needle Gauge. 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 Steel Measuring Tool, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Tungsten Steel Plug Gauge.

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,Non-magnetic Tungsten Steel. In this process, ethylene is the polymer, the chemical building block of polyester,Carbide Safety Hammer.

The Manufacturing
Process

Polyester is manufactured by one of several methods.KF12 Tungsten Steel Round Bar for High Speed Stamping. The four basic forms are filament,EDM Tungsten Steel Sheet Material, tow, and fiberfill. In the filament form,GF20 Tungsten Steel Sheet, producing smooth-Cemented Carbide Ball.Tungsten Steel Ball, filaments are cut to short,ST7 Hard Alloy Core For Cold Heading Die.K44 Tungsten Steel Fine Grinding Rod. 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.Tungsten Steel Single Straight Hole Threaded Round Rod With.

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-TSF44 Tungsten Steel Carving Knife,JG Coordinate Grinding, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Tungsten Carbide Steel. 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.Stretch Stamping Die, which are usually round,Powder Metallurgy Mold. The number of holes in the spinneret determines the size of the yarn,Motor Progressive Die.
• 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,Stainless Steel LED Mould. 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,Terminal Stamping Die.
• Wire Drawing Core Die,IC Semiconductor Packaging Mold. Also,Lead Frame Mold,Lithium Battery Mould.

Winding

• 8 After the polyester yarn is drawn, it is wound on large bobbins or flat-wound packages, ready to be woven into material.

Cemented Carbide Mould

Brass Clamp for pipe, 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,BSPT Brass Compression Fitting. The rope-462 MBL x MI Elbow.

Drawing tow

• 1 Newly-363 MBL x FI Socket.MBL Fitting.

Crimping

• 2 Drawn tow is then fed into compression boxes,Hose Fitting PEX, at a rate of 9-15 crimps per inch (3-6 per cm).Flexible hose fitting.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)319 Extension Fitting.Brass Fitting.

Cutting

• 4 Following heat setting,414 MI x FI 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)ecFIT Brass Threaded Fitting.319 Extension Fitting, such ascarpet,polyester filaments are cut into 6 inch (15 cm)NPT Brass Threaded Fitting.

The Future

Brass Threaded Fitting,BSPT Brass Threaded Fitting's fastest-growing fiber.312 MI x Socket. 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,Galvanized Fitting, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Nickel Plated Fitting. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.653 Wallplated Tee, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.