Polyester

Background

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

Polyester is used in the manufacture of many products, including clothing, home furnishings,WF15 Tungsten Steel Thimble, computer and recording tapes, and electrical insulation.MC20 Tungsten Steel Notch Punch. It does not absorb moisture, but does absorb oil;RD50 Tungsten Steel Flat Needle-, soil-, and fire-KG7 Tungsten Steel Insert. Its low absorbency also makes it naturally resistant to stains.SKD61 Division Tube,Tungsten Steel Notch Punch.Son And Mother Punch, and not damaged by mildew.Pulling Teeth And Punching Needles, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,SKD61 Division Needle-based E.I. du Pont de Nemours and Co.PG Optical Grinding Processing. This early research, headed by W.H. Carothers,Archie Oil Cutting 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,Centerless Grinding Precision Machining. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Precision Tungsten Steel EDM,Tungsten Steel Slow Wire 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 Processing, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Tungsten Steel Round Bar.

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

The Manufacturing
Process

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

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-GF20 Tungsten Steel Sheet,Cemented Carbide Ball, is extruded through a slot to form long ribbons.

Drying

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

Stainless Steel LED Mould

Terminal Stamping 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,Wire Drawing Core Die. The rope-IC Semiconductor Packaging Mold.

Drawing tow

• 1 Newly-Lead Frame Mold.Lithium Battery Mould.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)BSPT Brass Compression Fitting.462 MBL x MI Elbow.

Cutting

• 4 Following heat setting,363 MBL x FI Socket. 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)MBL Fitting.Hose Fitting PEX, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Flexible hose fitting.

The Future

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