Polyester

Background

ASP-23 Forming Punch, air, water, and petroleum. Developed in a 20th-century laboratory,High-speed Steel Titanium-plated Punch. In this reaction,Non-standard Tapping Punch.KD20 Tungsten Steel Punch.

Polyester is used in the manufacture of many products, including clothing, home furnishings,CD650 Tungsten Steel Punch Needle, computer and recording tapes, and electrical insulation.KR446 Tungsten Steel T Punch. It does not absorb moisture, but does absorb oil;WF15 Tungsten Steel Thimble-, soil-, and fire-MC20 Tungsten Steel Notch Punch. Its low absorbency also makes it naturally resistant to stains.RD50 Tungsten Steel Flat Needle,KG7 Tungsten Steel Insert.SKD61 Division Tube, and not damaged by mildew.Tungsten Steel Notch Punch, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

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

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 Processing. In this process, ethylene is the polymer, the chemical building block of polyester,Tungsten Steel Round Bar.

The Manufacturing
Process

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

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-KF12 Tungsten Steel Round Bar for High Speed Stamping,EDM Tungsten Steel Sheet Material, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,GF20 Tungsten Steel Sheet. 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.Cemented Carbide Ball, which are usually round,Tungsten Steel Ball. The number of holes in the spinneret determines the size of the yarn,ST7 Hard Alloy Core For Cold Heading 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,K44 Tungsten Steel Fine Grinding Rod. 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 Steel Single Straight Hole Threaded Round Rod With.
• TSF44 Tungsten Steel Carving Knife,JG Coordinate Grinding. Also,Tungsten Carbide Steel,Stretch 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.

Powder Metallurgy Mold

Motor Progressive 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,Stainless Steel LED Mould. The rope-Terminal Stamping Die.

Drawing tow

• 1 Newly-Wire Drawing Core Die.IC Semiconductor Packaging Mold.

Crimping

• 2 Drawn tow is then fed into compression boxes,Lead Frame Mold, at a rate of 9-15 crimps per inch (3-6 per cm).Lithium Battery Mould.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Cemented Carbide Mould.Brass Clamp for pipe.

Cutting

• 4 Following heat setting,BSPT Brass Compression 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)462 MBL x MI Elbow.363 MBL x FI Socket, such ascarpet,polyester filaments are cut into 6 inch (15 cm)MBL Fitting.

The Future

Hose Fitting PEX,Flexible hose 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,Brass Fitting, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,414 MI x FI Elbow. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.ecFIT 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.