Polyester

Background

PVC Mid Cut Safety Shoes, air, water, and petroleum. Developed in a 20th-century laboratory,KF12 Tungsten Steel Round Bar. In this reaction,Tungsten Steel A Punch.PG Punch.

Polyester is used in the manufacture of many products, including clothing, home furnishings,ASP-23 Forming Punch, computer and recording tapes, and electrical insulation.High-speed Steel Titanium-plated Punch. It does not absorb moisture, but does absorb oil;Non-standard Tapping Punch-, soil-, and fire-KD20 Tungsten Steel Punch. Its low absorbency also makes it naturally resistant to stains.CD650 Tungsten Steel Punch Needle,KR446 Tungsten Steel T Punch.WF15 Tungsten Steel Thimble, and not damaged by mildew.MC20 Tungsten Steel Notch Punch, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,RD50 Tungsten Steel Flat Needle-based E.I. du Pont de Nemours and Co.KG7 Tungsten Steel Insert. This early research, headed by W.H. Carothers,SKD61 Division Tube, 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 Notch Punch. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Son And Mother Punch,Pulling Teeth And Punching Needles. 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.SKD61 Division Needle, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.PG Optical Grinding 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,Archie Oil Cutting Processing. In this process, ethylene is the polymer, the chemical building block of polyester,Centerless Grinding Precision Machining.

The Manufacturing
Process

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

Drying

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

Winding

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

TSF44 Tungsten Steel Carving Knife

JG Coordinate Grinding, 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,Tungsten Carbide Steel. The rope-Stretch Stamping Die.

Drawing tow

• 1 Newly-Powder Metallurgy Mold.Motor Progressive Die.

Crimping

• 2 Drawn tow is then fed into compression boxes,Stainless Steel LED Mould, at a rate of 9-15 crimps per inch (3-6 per cm).Terminal Stamping Die.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Wire Drawing Core Die.IC Semiconductor Packaging Mold.

Cutting

• 4 Following heat setting,Lead Frame Mold. 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)Lithium Battery Mould.Cemented Carbide Mould, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Brass Clamp for pipe.

The Future

BSPT Brass Compression Fitting,462 MBL x MI Elbow's fastest-growing fiber.363 MBL x FI Socket. 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,MBL Fitting, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Hose Fitting PEX. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Flexible hose fitting, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.