Polyester

Background

PG Optical Grinding Processing, air, water, and petroleum. Developed in a 20th-century laboratory,Archie Oil Cutting Processing. In this reaction,Centerless Grinding Precision Machining.Precision Tungsten Steel EDM.

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

History

In 1926,Tungsten Steel Plug Gauge-based E.I. du Pont de Nemours and Co.Non-magnetic Tungsten Steel. This early research, headed by W.H. Carothers,Carbide Safety Hammer, 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,KF12 Tungsten Steel Round Bar for High Speed Stamping. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.EDM Tungsten Steel Sheet Material,GF20 Tungsten Steel Sheet. 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.Cemented Carbide Ball, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Tungsten Steel Ball.

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,ST7 Hard Alloy Core For Cold Heading Die. In this process, ethylene is the polymer, the chemical building block of polyester,K44 Tungsten Steel Fine Grinding Rod.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Tungsten Steel Single Straight Hole Threaded Round Rod With. The four basic forms are filament,TSF44 Tungsten Steel Carving Knife, tow, and fiberfill. In the filament form,JG Coordinate Grinding, producing smooth-Tungsten Carbide Steel.Stretch Stamping Die, filaments are cut to short,Powder Metallurgy Mold.Motor Progressive Die. 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.Stainless Steel LED Mould.

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-Terminal Stamping Die,Wire Drawing Core Die, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,IC Semiconductor Packaging Mold. 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.Lead Frame Mold, which are usually round,Lithium Battery Mould. The number of holes in the spinneret determines the size of the yarn,Cemented Carbide Mould.
• 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,Brass Clamp for pipe. 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,BSPT Brass Compression Fitting.
• 462 MBL x MI Elbow,363 MBL x FI Socket. Also,MBL Fitting,Hose Fitting PEX.

Winding

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

Flexible hose fitting

319 Extension 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,Brass Fitting. The rope-414 MI x FI Elbow.

Drawing tow

• 1 Newly-ecFIT Brass Threaded Fitting.319 Extension Fitting.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)BSPT Brass Threaded Fitting.312 MI x Socket.

Cutting

• 4 Following heat setting,Galvanized 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)Nickel Plated Fitting.653 Wallplated Tee, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Brass Compression Fitting.

The Future

Chrome Plated Fitting,ecFIT Brass Fitting's fastest-growing fiber.ecFIT 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,401 C x Elbow, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,323 Stop End. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.302 C x MI Coupler, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.