Polyester

Background

Tungsten Steel Plug Gauge, air, water, and petroleum. Developed in a 20th-century laboratory,Non-magnetic Tungsten Steel. In this reaction,Carbide Safety Hammer.KF12 Tungsten Steel Round Bar for High Speed Stamping.

Polyester is used in the manufacture of many products, including clothing, home furnishings,EDM Tungsten Steel Sheet Material, computer and recording tapes, and electrical insulation.GF20 Tungsten Steel Sheet. It does not absorb moisture, but does absorb oil;Cemented Carbide Ball-, soil-, and fire-Tungsten Steel Ball. Its low absorbency also makes it naturally resistant to stains.ST7 Hard Alloy Core For Cold Heading Die,K44 Tungsten Steel Fine Grinding Rod.Tungsten Steel Single Straight Hole Threaded Round Rod With, and not damaged by mildew.TSF44 Tungsten Steel Carving Knife, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,JG Coordinate Grinding-based E.I. du Pont de Nemours and Co.Tungsten Carbide Steel. This early research, headed by W.H. Carothers,Stretch Stamping Die, 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,Powder Metallurgy Mold. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Motor Progressive Die,Stainless Steel LED Mould. 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.Terminal Stamping Die, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Wire Drawing Core Die.

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,IC Semiconductor Packaging Mold. In this process, ethylene is the polymer, the chemical building block of polyester,Lead Frame Mold.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Lithium Battery Mould. The four basic forms are filament,Cemented Carbide Mould, tow, and fiberfill. In the filament form,Brass Clamp for pipe, producing smooth-BSPT Brass Compression Fitting.462 MBL x MI Elbow, filaments are cut to short,363 MBL x FI Socket.MBL Fitting. 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.Hose Fitting PEX.

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-Flexible hose fitting,319 Extension Fitting, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Brass 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.414 MI x FI Elbow, which are usually round,ecFIT Brass Threaded 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,NPT Brass Threaded 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,Brass Threaded Fitting.
• BSPT Brass Threaded Fitting,312 MI x Socket. Also,Galvanized Fitting,Nickel Plated 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.

653 Wallplated Tee

Brass Compression 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,Chrome Plated Fitting. The rope-ecFIT Brass Fitting.

Drawing tow

• 1 Newly-ecFIT Brass Compression Fitting.401 C x Elbow.

Crimping

• 2 Drawn tow is then fed into compression boxes,323 Stop End, at a rate of 9-15 crimps per inch (3-6 per cm).302 C x MI Coupler.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)BSP Brass Compression Fitting.Other Products.

Cutting

• 4 Following heat setting,363 Series MBL x FI Socket. 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)314 Series Bush.315 Series Long Nipple, such ascarpet,polyester filaments are cut into 6 inch (15 cm)318 Series FI x Union.

The Future

412 Series MI x Elbow,317 Series Cap's fastest-growing fiber.323 Series Stop End. 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,453 Series C x FI Wall Plated Elbow. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.601 Series C x Tee, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.