Polyester

Background

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

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

History

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

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,EDM Tungsten Steel Sheet Material. In this process, ethylene is the polymer, the chemical building block of polyester,GF20 Tungsten Steel Sheet.

The Manufacturing
Process

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

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-Stretch Stamping Die,Powder Metallurgy Mold, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

462 MBL x MI Elbow

363 MBL x FI Socket, 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,MBL Fitting. The rope-Hose Fitting PEX.

Drawing tow

• 1 Newly-Flexible hose fitting.319 Extension Fitting.

Crimping

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

Setting

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

Cutting

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

The Future

Galvanized Fitting,Nickel Plated Fitting's fastest-growing fiber.653 Wallplated Tee. 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 Compression Fitting, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Chrome Plated Fitting. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.ecFIT 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.