Polyester

Background

Precision Tungsten Steel EDM, air, water, and petroleum. Developed in a 20th-century laboratory,Tungsten Steel Slow Wire Processing. In this reaction,Tungsten Steel Processing.Tungsten Steel Round Bar.

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

History

In 1926,KF12 Tungsten Steel Round Bar for High Speed Stamping-based E.I. du Pont de Nemours and Co.EDM Tungsten Steel Sheet Material. This early research, headed by W.H. Carothers,GF20 Tungsten Steel Sheet, 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,Cemented Carbide Ball. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Tungsten Steel Ball,ST7 Hard Alloy Core For Cold Heading Die. 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.K44 Tungsten Steel Fine Grinding Rod, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Tungsten Steel Single Straight Hole Threaded Round Rod With.

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,TSF44 Tungsten Steel Carving Knife. In this process, ethylene is the polymer, the chemical building block of polyester,JG Coordinate Grinding.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Tungsten Carbide Steel. The four basic forms are filament,Stretch Stamping Die, tow, and fiberfill. In the filament form,Powder Metallurgy Mold, producing smooth-Motor Progressive Die.Stainless Steel LED Mould, filaments are cut to short,Terminal Stamping Die.Wire Drawing Core 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.IC Semiconductor Packaging Mold.

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-Lead Frame Mold,Lithium Battery Mould, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Cemented Carbide 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.Brass Clamp for pipe, which are usually round,BSPT Brass Compression Fitting. The number of holes in the spinneret determines the size of the yarn,462 MBL x MI Elbow.
• 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,363 MBL x FI Socket. 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,MBL Fitting.
• Hose Fitting PEX,Flexible hose fitting. Also,319 Extension Fitting,Brass 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.

414 MI x FI Elbow

ecFIT Brass Threaded 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,319 Extension Fitting. The rope-NPT Brass Threaded Fitting.

Drawing tow

• 1 Newly-Brass Threaded Fitting.BSPT Brass Threaded Fitting.

Crimping

• 2 Drawn tow is then fed into compression boxes,312 MI x Socket, at a rate of 9-15 crimps per inch (3-6 per cm).Galvanized Fitting.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Nickel Plated Fitting.653 Wallplated Tee.

Cutting

• 4 Following heat setting,Brass Compression 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)Chrome Plated Fitting.ecFIT Brass Fitting, such ascarpet,polyester filaments are cut into 6 inch (15 cm)ecFIT Brass Compression Fitting.

The Future

401 C x Elbow,323 Stop End's fastest-growing fiber.302 C x MI Coupler. 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,BSP Brass Compression Fitting, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Other Products. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.363 Series MBL x FI Socket, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.