Polyester

Background

Tungsten Steel Fine Grinding Rod, air, water, and petroleum. Developed in a 20th-century laboratory,Tungsten Steel Threading Hole Rod. In this reaction,Tungsten Steel Needle Gauge.Tungsten Steel Measuring Tool.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Tungsten Steel Plug Gauge, computer and recording tapes, and electrical insulation.Non-magnetic Tungsten Steel. It does not absorb moisture, but does absorb oil;Carbide Safety Hammer-, soil-, and fire-KF12 Tungsten Steel Round Bar for High Speed Stamping. Its low absorbency also makes it naturally resistant to stains.EDM Tungsten Steel Sheet Material,GF20 Tungsten Steel Sheet.Cemented Carbide Ball, and not damaged by mildew.Tungsten Steel Ball, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,ST7 Hard Alloy Core For Cold Heading Die-based E.I. du Pont de Nemours and Co.K44 Tungsten Steel Fine Grinding Rod. This early research, headed by W.H. Carothers,Tungsten Steel Single Straight Hole Threaded Round Rod With, 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,TSF44 Tungsten Steel Carving Knife. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.JG Coordinate Grinding,Tungsten Carbide 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.Stretch Stamping Die, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Powder Metallurgy Mold.

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,Motor Progressive Die. In this process, ethylene is the polymer, the chemical building block of polyester,Stainless Steel LED Mould.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Terminal Stamping Die. The four basic forms are filament,Wire Drawing Core Die, tow, and fiberfill. In the filament form,IC Semiconductor Packaging Mold, producing smooth-Lead Frame Mold.Lithium Battery Mould, filaments are cut to short,Cemented Carbide Mould.Brass Clamp for pipe. 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.BSPT Brass Compression Fitting.

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-462 MBL x MI Elbow,363 MBL x FI Socket, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,MBL Fitting. 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.Hose Fitting PEX, which are usually round,Flexible hose fitting. The number of holes in the spinneret determines the size of the yarn,319 Extension Fitting.
• 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 Fitting. 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,414 MI x FI Elbow.
• ecFIT Brass Threaded Fitting,319 Extension Fitting. Also,NPT Brass Threaded Fitting,Brass Threaded 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.

BSPT Brass Threaded Fitting

312 MI x 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,Galvanized Fitting. The rope-Nickel Plated Fitting.

Drawing tow

• 1 Newly-653 Wallplated Tee.Brass Compression Fitting.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)ecFIT Brass Compression Fitting.401 C x Elbow.

Cutting

• 4 Following heat setting,323 Stop End. 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)302 C x MI Coupler.BSP Brass Compression Fitting, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Other Products.

The Future

363 Series MBL x FI Socket,314 Series Bush's fastest-growing fiber.315 Series Long Nipple. 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,318 Series FI x Union, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,412 Series MI x Elbow. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.317 Series Cap, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.