Polyester

Background

Son And Mother Punch, air, water, and petroleum. Developed in a 20th-century laboratory,Pulling Teeth And Punching Needles. In this reaction,SKD61 Division Needle.PG Optical Grinding Processing.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Archie Oil Cutting Processing, computer and recording tapes, and electrical insulation.Centerless Grinding Precision Machining. It does not absorb moisture, but does absorb oil;Precision Tungsten Steel EDM-, soil-, and fire-Tungsten Steel Slow Wire Processing. Its low absorbency also makes it naturally resistant to stains.Tungsten Steel Processing,Tungsten Steel Round Bar.Tungsten Steel Sheet, and not damaged by mildew.Tungsten Steel Fine Grinding Rod, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Tungsten Steel Threading Hole Rod-based E.I. du Pont de Nemours and Co.Tungsten Steel Needle Gauge. This early research, headed by W.H. Carothers,Tungsten Steel Measuring Tool, 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 Plug Gauge. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Non-magnetic Tungsten Steel,Carbide Safety Hammer. 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.KF12 Tungsten Steel Round Bar for High Speed Stamping, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.EDM Tungsten Steel Sheet Material.

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,GF20 Tungsten Steel Sheet. In this process, ethylene is the polymer, the chemical building block of polyester,Cemented Carbide Ball.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Tungsten Steel Ball. The four basic forms are filament,ST7 Hard Alloy Core For Cold Heading Die, tow, and fiberfill. In the filament form,K44 Tungsten Steel Fine Grinding Rod, producing smooth-Tungsten Steel Single Straight Hole Threaded Round Rod With.TSF44 Tungsten Steel Carving Knife, filaments are cut to short,JG Coordinate Grinding.Tungsten Carbide 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.Stretch Stamping 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-Powder Metallurgy Mold,Motor Progressive Die, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Stainless Steel LED Mould. 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.Terminal Stamping Die, which are usually round,Wire Drawing Core Die. The number of holes in the spinneret determines the size of the yarn,IC Semiconductor Packaging Mold.
• 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,Lead Frame 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,Lithium Battery Mould.
• Cemented Carbide Mould,Brass Clamp for pipe. Also,BSPT Brass Compression Fitting,462 MBL x MI Elbow.

Winding

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

363 MBL x FI Socket

MBL Fitting, 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,Hose Fitting PEX. The rope-Flexible hose fitting.

Drawing tow

• 1 Newly-319 Extension Fitting.Brass Fitting.

Crimping

• 2 Drawn tow is then fed into compression boxes,414 MI x FI Elbow, at a rate of 9-15 crimps per inch (3-6 per cm).ecFIT Brass Threaded Fitting.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)319 Extension Fitting.NPT Brass Threaded Fitting.

Cutting

• 4 Following heat setting,Brass Threaded 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)BSPT Brass Threaded Fitting.312 MI x Socket, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Galvanized Fitting.

The Future

Nickel Plated Fitting,653 Wallplated Tee's fastest-growing fiber.Brass Compression 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,Chrome Plated Fitting, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,ecFIT Brass Fitting. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.ecFIT Brass Compression Fitting, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.