Polyester

Background

KR446 Tungsten Steel T Punch, air, water, and petroleum. Developed in a 20th-century laboratory,WF15 Tungsten Steel Thimble. In this reaction,MC20 Tungsten Steel Notch Punch.RD50 Tungsten Steel Flat Needle.

Polyester is used in the manufacture of many products, including clothing, home furnishings,KG7 Tungsten Steel Insert, computer and recording tapes, and electrical insulation.SKD61 Division Tube. It does not absorb moisture, but does absorb oil;Tungsten Steel Notch Punch-, soil-, and fire-Son And Mother Punch. Its low absorbency also makes it naturally resistant to stains.Pulling Teeth And Punching Needles,SKD61 Division Needle.PG Optical Grinding Processing, and not damaged by mildew.Archie Oil Cutting Processing, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

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

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 Steel Needle Gauge. In this process, ethylene is the polymer, the chemical building block of polyester,Tungsten Steel Measuring Tool.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Tungsten Steel Plug Gauge. The four basic forms are filament,Non-magnetic Tungsten Steel, tow, and fiberfill. In the filament form,Carbide Safety Hammer, producing smooth-KF12 Tungsten Steel Round Bar for High Speed Stamping.EDM Tungsten Steel Sheet Material, filaments are cut to short,GF20 Tungsten Steel Sheet.Cemented Carbide Ball. 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 Ball.

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-ST7 Hard Alloy Core For Cold Heading Die,K44 Tungsten Steel Fine Grinding Rod, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Tungsten Steel Single Straight Hole Threaded Round Rod With. 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.TSF44 Tungsten Steel Carving Knife, which are usually round,JG Coordinate Grinding. The number of holes in the spinneret determines the size of the yarn,Tungsten Carbide Steel.
• 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,Stretch Stamping Die. 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,Powder Metallurgy Mold.
• Motor Progressive Die,Stainless Steel LED Mould. Also,Terminal Stamping Die,Wire Drawing Core Die.

Winding

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

IC Semiconductor Packaging Mold

Lead Frame Mold, 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,Lithium Battery Mould. The rope-Cemented Carbide Mould.

Drawing tow

• 1 Newly-Brass Clamp for pipe.BSPT Brass Compression Fitting.

Crimping

• 2 Drawn tow is then fed into compression boxes,462 MBL x MI Elbow, at a rate of 9-15 crimps per inch (3-6 per cm).363 MBL x FI Socket.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)MBL Fitting.Hose Fitting PEX.

Cutting

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

The Future

ecFIT Brass Threaded Fitting,319 Extension Fitting's fastest-growing fiber.NPT Brass Threaded Fitting. 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,Brass Threaded Fitting, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,BSPT Brass Threaded Fitting. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.312 MI x Socket, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.