Polyester

Background

KF12 Tungsten Steel Round Bar for High Speed Stamping, air, water, and petroleum. Developed in a 20th-century laboratory,EDM Tungsten Steel Sheet Material. In this reaction,GF20 Tungsten Steel Sheet.Cemented Carbide Ball.

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

History

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

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,Cemented Carbide Mould. In this process, ethylene is the polymer, the chemical building block of polyester,Brass Clamp for pipe.

The Manufacturing
Process

Polyester is manufactured by one of several methods.BSPT Brass Compression Fitting. The four basic forms are filament,462 MBL x MI Elbow, tow, and fiberfill. In the filament form,363 MBL x FI Socket, producing smooth-MBL Fitting.Hose Fitting PEX, filaments are cut to short,Flexible hose fitting.319 Extension 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.Brass 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-414 MI x FI Elbow,ecFIT Brass Threaded Fitting, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,319 Extension 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.NPT Brass Threaded Fitting, which are usually round,Brass Threaded Fitting. The number of holes in the spinneret determines the size of the yarn,BSPT Brass Threaded 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,312 MI x 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,Galvanized Fitting.
• Nickel Plated Fitting,653 Wallplated Tee. Also,Brass Compression Fitting,Chrome 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.

ecFIT Brass Fitting

ecFIT 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,401 C x Elbow. The rope-323 Stop End.

Drawing tow

• 1 Newly-302 C x MI Coupler.BSP Brass Compression Fitting.

Crimping

• 2 Drawn tow is then fed into compression boxes,Other Products, at a rate of 9-15 crimps per inch (3-6 per cm).363 Series MBL x FI Socket.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)314 Series Bush.315 Series Long Nipple.

Cutting

• 4 Following heat setting,318 Series FI x Union. 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)412 Series MI x Elbow.317 Series Cap, such ascarpet,polyester filaments are cut into 6 inch (15 cm)323 Series Stop End.

The Future

401 C x Elbow,453 Series C x FI Wall Plated Elbow's fastest-growing fiber.601 Series C x Tee. 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,684 Series C x FI Tee, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,All-stainless Kitchen Scissors. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Upgrade Version Of Multi-purposed Kitchen Scissors, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.