Polyester

Background

CD650 Tungsten Steel Punch Needle, air, water, and petroleum. Developed in a 20th-century laboratory,KR446 Tungsten Steel T Punch. In this reaction,WF15 Tungsten Steel Thimble.MC20 Tungsten Steel Notch Punch.

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

History

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.Tungsten Steel Measuring Tool. The four basic forms are filament,Tungsten Steel Plug Gauge, tow, and fiberfill. In the filament form,Non-magnetic Tungsten Steel, producing smooth-Carbide Safety Hammer.KF12 Tungsten Steel Round Bar for High Speed Stamping, filaments are cut to short,EDM Tungsten Steel Sheet Material.GF20 Tungsten Steel Sheet. 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.Cemented Carbide 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-Tungsten Steel Ball,ST7 Hard Alloy Core For Cold Heading Die, is extruded through a slot to form long ribbons.

Drying

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

Wire Drawing Core Die

IC Semiconductor Packaging 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,Lead Frame Mold. The rope-Lithium Battery Mould.

Drawing tow

• 1 Newly-Cemented Carbide Mould.Brass Clamp for pipe.

Crimping

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

Setting

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

Cutting

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

The Future

414 MI x FI Elbow,ecFIT Brass Threaded Fitting's fastest-growing fiber.319 Extension 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,NPT Brass Threaded Fitting, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Brass Threaded Fitting. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.BSPT 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.