Polyester

Background

WF15 Tungsten Steel Thimble, air, water, and petroleum. Developed in a 20th-century laboratory,MC20 Tungsten Steel Notch Punch. In this reaction,RD50 Tungsten Steel Flat Needle.KG7 Tungsten Steel Insert.

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

History

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

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 Measuring Tool. In this process, ethylene is the polymer, the chemical building block of polyester,Tungsten Steel Plug Gauge.

The Manufacturing
Process

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

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-K44 Tungsten Steel Fine Grinding Rod,Tungsten Steel Single Straight Hole Threaded Round Rod With, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,TSF44 Tungsten Steel Carving Knife. 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.JG Coordinate Grinding, which are usually round,Tungsten Carbide Steel. The number of holes in the spinneret determines the size of the yarn,Stretch Stamping 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,Powder Metallurgy Mold. 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,Motor Progressive Die.
• Stainless Steel LED Mould,Terminal Stamping Die. Also,Wire Drawing Core Die,IC Semiconductor Packaging Mold.

Winding

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

Lead Frame Mold

Lithium Battery Mould, 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,Cemented Carbide Mould. The rope-Brass Clamp for pipe.

Drawing tow

• 1 Newly-BSPT Brass Compression Fitting.462 MBL x MI Elbow.

Crimping

• 2 Drawn tow is then fed into compression boxes,363 MBL x FI Socket, at a rate of 9-15 crimps per inch (3-6 per cm).MBL Fitting.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Hose Fitting PEX.Flexible hose fitting.

Cutting

• 4 Following heat setting,319 Extension 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)Brass Fitting.414 MI x FI Elbow, such ascarpet,polyester filaments are cut into 6 inch (15 cm)ecFIT Brass Threaded Fitting.

The Future

319 Extension Fitting,NPT Brass Threaded Fitting's fastest-growing fiber.Brass Threaded 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,BSPT Brass Threaded Fitting, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,312 MI x Socket. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Galvanized Fitting, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.