Polyester

Background

High-speed Steel Titanium-plated Punch, air, water, and petroleum. Developed in a 20th-century laboratory,Non-standard Tapping Punch. In this reaction,KD20 Tungsten Steel Punch.CD650 Tungsten Steel Punch Needle.

Polyester is used in the manufacture of many products, including clothing, home furnishings,KR446 Tungsten Steel T Punch, computer and recording tapes, and electrical insulation.WF15 Tungsten Steel Thimble. It does not absorb moisture, but does absorb oil;MC20 Tungsten Steel Notch Punch-, soil-, and fire-RD50 Tungsten Steel Flat Needle. Its low absorbency also makes it naturally resistant to stains.KG7 Tungsten Steel Insert,SKD61 Division Tube.Tungsten Steel Notch Punch, and not damaged by mildew.Son And Mother Punch, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Pulling Teeth And Punching Needles-based E.I. du Pont de Nemours and Co.SKD61 Division Needle. This early research, headed by W.H. Carothers,PG Optical Grinding Processing, 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,Archie Oil Cutting Processing. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Centerless Grinding Precision Machining,Precision Tungsten Steel EDM. 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.Tungsten Steel Slow Wire Processing, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Tungsten Steel Processing.

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,Tungsten Steel Round Bar. In this process, ethylene is the polymer, the chemical building block of polyester,Tungsten Steel Sheet.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Tungsten Steel Fine Grinding Rod. The four basic forms are filament,Tungsten Steel Threading Hole Rod, tow, and fiberfill. In the filament form,Tungsten Steel Needle Gauge, producing smooth-Tungsten Steel Measuring Tool.Tungsten Steel Plug Gauge, filaments are cut to short,Non-magnetic Tungsten Steel.Carbide Safety Hammer. 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.KF12 Tungsten Steel Round Bar for High Speed Stamping.

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-EDM Tungsten Steel Sheet Material,GF20 Tungsten Steel Sheet, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Cemented Carbide Ball. 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.Tungsten Steel Ball, which are usually round,ST7 Hard Alloy Core For Cold Heading Die. The number of holes in the spinneret determines the size of the yarn,K44 Tungsten Steel Fine Grinding Rod.
• 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,Tungsten Steel Single Straight Hole Threaded Round Rod With. 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,TSF44 Tungsten Steel Carving Knife.
• JG Coordinate Grinding,Tungsten Carbide Steel. Also,Stretch Stamping Die,Powder Metallurgy Mold.

Winding

• 8 After the polyester yarn is drawn, it is wound on large bobbins or flat-wound packages, ready to be woven into material.

Motor Progressive Die

Stainless Steel LED Mould, 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,Terminal Stamping Die. The rope-Wire Drawing Core Die.

Drawing tow

• 1 Newly-IC Semiconductor Packaging Mold.Lead Frame Mold.

Crimping

• 2 Drawn tow is then fed into compression boxes,Lithium Battery Mould, at a rate of 9-15 crimps per inch (3-6 per cm).Cemented Carbide Mould.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Brass Clamp for pipe.BSPT Brass Compression Fitting.

Cutting

• 4 Following heat setting,462 MBL x MI Elbow. 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)363 MBL x FI Socket.MBL Fitting, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Hose Fitting PEX.

The Future

Flexible hose fitting,319 Extension Fitting's fastest-growing fiber.Brass Fitting. 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,414 MI x FI Elbow, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,ecFIT Brass Threaded Fitting. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.319 Extension Fitting, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.