Polyester

Background

Offset Print  Low Cut Safety Shoes, air, water, and petroleum. Developed in a 20th-century laboratory,PVC Mid Cut Safety Shoes. In this reaction,KF12 Tungsten Steel Round Bar.Tungsten Steel A Punch.

Polyester is used in the manufacture of many products, including clothing, home furnishings,PG Punch, computer and recording tapes, and electrical insulation.ASP-23 Forming Punch. It does not absorb moisture, but does absorb oil;High-speed Steel Titanium-plated Punch-, soil-, and fire-Non-standard Tapping Punch. Its low absorbency also makes it naturally resistant to stains.KD20 Tungsten Steel Punch,CD650 Tungsten Steel Punch Needle.KR446 Tungsten Steel T Punch, and not damaged by mildew.WF15 Tungsten Steel Thimble, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,MC20 Tungsten Steel Notch Punch-based E.I. du Pont de Nemours and Co.RD50 Tungsten Steel Flat Needle. This early research, headed by W.H. Carothers,KG7 Tungsten Steel Insert, 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,SKD61 Division Tube. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Tungsten Steel Notch Punch,Son And Mother Punch. 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.Pulling Teeth And Punching Needles, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.SKD61 Division Needle.

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,PG Optical Grinding Processing. In this process, ethylene is the polymer, the chemical building block of polyester,Archie Oil Cutting Processing.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Centerless Grinding Precision Machining. The four basic forms are filament,Precision Tungsten Steel EDM, tow, and fiberfill. In the filament form,Tungsten Steel Slow Wire Processing, producing smooth-Tungsten Steel Processing.Tungsten Steel Round Bar, filaments are cut to short,Tungsten Steel Sheet.Tungsten Steel Fine Grinding Rod. 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.Tungsten Steel Threading Hole Rod.

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-Tungsten Steel Needle Gauge,Tungsten Steel Measuring Tool, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Tungsten Steel Plug Gauge. 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.Non-magnetic Tungsten Steel, which are usually round,Carbide Safety Hammer. The number of holes in the spinneret determines the size of the yarn,KF12 Tungsten Steel Round Bar for High Speed Stamping.
• 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,EDM Tungsten Steel Sheet Material. 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,GF20 Tungsten Steel Sheet.
• Cemented Carbide Ball,Tungsten Steel Ball. Also,ST7 Hard Alloy Core For Cold Heading Die,K44 Tungsten Steel Fine Grinding Rod.

Winding

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

Tungsten Steel Single Straight Hole Threaded Round Rod With

TSF44 Tungsten Steel Carving Knife, 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,JG Coordinate Grinding. The rope-Tungsten Carbide Steel.

Drawing tow

• 1 Newly-Stretch Stamping Die.Powder Metallurgy Mold.

Crimping

• 2 Drawn tow is then fed into compression boxes,Motor Progressive Die, at a rate of 9-15 crimps per inch (3-6 per cm).Stainless Steel LED Mould.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Terminal Stamping Die.Wire Drawing Core Die.

Cutting

• 4 Following heat setting,IC Semiconductor Packaging Mold. 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)Lead Frame Mold.Lithium Battery Mould, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Cemented Carbide Mould.

The Future

Brass Clamp for pipe,BSPT Brass Compression Fitting's fastest-growing fiber.462 MBL x MI Elbow. 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,363 MBL x FI Socket, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,MBL Fitting. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Hose Fitting PEX, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.