Polyester

Background

KD20 Tungsten Steel Punch, air, water, and petroleum. Developed in a 20th-century laboratory,CD650 Tungsten Steel Punch Needle. In this reaction,KR446 Tungsten Steel T Punch.WF15 Tungsten Steel Thimble.

Polyester is used in the manufacture of many products, including clothing, home furnishings,MC20 Tungsten Steel Notch Punch, computer and recording tapes, and electrical insulation.RD50 Tungsten Steel Flat Needle. It does not absorb moisture, but does absorb oil;KG7 Tungsten Steel Insert-, soil-, and fire-SKD61 Division Tube. Its low absorbency also makes it naturally resistant to stains.Tungsten Steel Notch Punch,Son And Mother Punch.Pulling Teeth And Punching Needles, and not damaged by mildew.SKD61 Division Needle, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

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

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 Fine Grinding Rod. In this process, ethylene is the polymer, the chemical building block of polyester,Tungsten Steel Threading Hole Rod.

The Manufacturing
Process

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

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 Ball,Tungsten Steel Ball, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,ST7 Hard Alloy Core For Cold Heading Die. 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.K44 Tungsten Steel Fine Grinding Rod, which are usually round,Tungsten Steel Single Straight Hole Threaded Round Rod With. The number of holes in the spinneret determines the size of the yarn,TSF44 Tungsten Steel Carving Knife.
• 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,JG Coordinate Grinding. 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,Tungsten Carbide Steel.
• Stretch Stamping Die,Powder Metallurgy Mold. Also,Motor Progressive Die,Stainless Steel LED 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.

Terminal Stamping Die

Wire Drawing Core Die, 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,IC Semiconductor Packaging Mold. The rope-Lead Frame Mold.

Drawing tow

• 1 Newly-Lithium Battery Mould.Cemented Carbide Mould.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)462 MBL x MI Elbow.363 MBL x FI Socket.

Cutting

• 4 Following heat setting,MBL 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)Hose Fitting PEX.Flexible hose fitting, such ascarpet,polyester filaments are cut into 6 inch (15 cm)319 Extension Fitting.

The Future

Brass Fitting,414 MI x FI Elbow's fastest-growing fiber.ecFIT 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,319 Extension Fitting, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,NPT Brass Threaded Fitting. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Brass Threaded Fitting, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.