Polyester

Background

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

Polyester is used in the manufacture of many products, including clothing, home furnishings,Non-standard Tapping Punch, computer and recording tapes, and electrical insulation.KD20 Tungsten Steel Punch. It does not absorb moisture, but does absorb oil;CD650 Tungsten Steel Punch Needle-, soil-, and fire-KR446 Tungsten Steel T Punch. Its low absorbency also makes it naturally resistant to stains.WF15 Tungsten Steel Thimble,MC20 Tungsten Steel Notch Punch.RD50 Tungsten Steel Flat Needle, and not damaged by mildew.KG7 Tungsten Steel Insert, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

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

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,Precision Tungsten Steel EDM. In this process, ethylene is the polymer, the chemical building block of polyester,Tungsten Steel Slow Wire Processing.

The Manufacturing
Process

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

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-Non-magnetic Tungsten Steel,Carbide Safety Hammer, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,KF12 Tungsten Steel Round Bar for High Speed Stamping. 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.EDM Tungsten Steel Sheet Material, which are usually round,GF20 Tungsten Steel Sheet. The number of holes in the spinneret determines the size of the yarn,Cemented Carbide Ball.
• 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 Steel Ball. 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,ST7 Hard Alloy Core For Cold Heading Die.
• K44 Tungsten Steel Fine Grinding Rod,Tungsten Steel Single Straight Hole Threaded Round Rod With. Also,TSF44 Tungsten Steel Carving Knife,JG Coordinate Grinding.

Winding

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

Tungsten Carbide Steel

Stretch 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,Powder Metallurgy Mold. The rope-Motor Progressive Die.

Drawing tow

• 1 Newly-Stainless Steel LED Mould.Terminal Stamping Die.

Crimping

• 2 Drawn tow is then fed into compression boxes,Wire Drawing Core Die, at a rate of 9-15 crimps per inch (3-6 per cm).IC Semiconductor Packaging Mold.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Lead Frame Mold.Lithium Battery Mould.

Cutting

• 4 Following heat setting,Cemented Carbide Mould. 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)Brass Clamp for pipe.BSPT Brass Compression Fitting, such ascarpet,polyester filaments are cut into 6 inch (15 cm)462 MBL x MI Elbow.

The Future

363 MBL x FI Socket,MBL Fitting's fastest-growing fiber.Hose Fitting PEX. 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,Flexible hose 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.Brass Fitting, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.