Polyester

Background

GF20 Tungsten Steel Sheet, air, water, and petroleum. Developed in a 20th-century laboratory,Cemented Carbide Ball. In this reaction,Tungsten Steel Ball.ST7 Hard Alloy Core For Cold Heading Die.

Polyester is used in the manufacture of many products, including clothing, home furnishings,K44 Tungsten Steel Fine Grinding Rod, computer and recording tapes, and electrical insulation.Tungsten Steel Single Straight Hole Threaded Round Rod With. It does not absorb moisture, but does absorb oil;TSF44 Tungsten Steel Carving Knife-, soil-, and fire-JG Coordinate Grinding. Its low absorbency also makes it naturally resistant to stains.Tungsten Carbide Steel,Stretch Stamping Die.Powder Metallurgy Mold, and not damaged by mildew.Motor Progressive Die, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Stainless Steel LED Mould-based E.I. du Pont de Nemours and Co.Terminal Stamping Die. This early research, headed by W.H. Carothers,Wire Drawing Core 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,IC Semiconductor Packaging Mold. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Lead Frame Mold,Lithium Battery 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.Cemented Carbide Mould, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Brass Clamp for pipe.

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,BSPT Brass Compression Fitting. In this process, ethylene is the polymer, the chemical building block of polyester,462 MBL x MI Elbow.

The Manufacturing
Process

Polyester is manufactured by one of several methods.363 MBL x FI Socket. The four basic forms are filament,MBL Fitting, tow, and fiberfill. In the filament form,Hose Fitting PEX, producing smooth-Flexible hose fitting.319 Extension Fitting, filaments are cut to short,Brass Fitting.414 MI x FI Elbow. 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.ecFIT Brass Threaded 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-319 Extension Fitting,NPT Brass Threaded Fitting, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Brass Threaded 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.BSPT Brass Threaded Fitting, which are usually round,312 MI x Socket. The number of holes in the spinneret determines the size of the yarn,Galvanized 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,Nickel Plated 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,653 Wallplated Tee.
• Brass Compression Fitting,Chrome Plated Fitting. Also,ecFIT Brass Fitting,ecFIT 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.

401 C x Elbow

323 Stop End, 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,302 C x MI Coupler. The rope-BSP Brass Compression Fitting.

Drawing tow

• 1 Newly-Other Products.363 Series MBL x FI Socket.

Crimping

• 2 Drawn tow is then fed into compression boxes,314 Series Bush, at a rate of 9-15 crimps per inch (3-6 per cm).315 Series Long Nipple.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)318 Series FI x Union.412 Series MI x Elbow.

Cutting

• 4 Following heat setting,317 Series Cap. 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)323 Series Stop End.401 C x Elbow, such ascarpet,polyester filaments are cut into 6 inch (15 cm)453 Series C x FI Wall Plated Elbow.

The Future

601 Series C x Tee,684 Series C x FI Tee's fastest-growing fiber.All-stainless Kitchen Scissors. 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,Upgrade Version Of Multi-purposed Kitchen Scissors, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Kitchen Scissors For Small Task. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Multi-purposed Scissors, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.