Polyester

Background

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

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

History

In 1926,WF15 Tungsten Steel Thimble-based E.I. du Pont de Nemours and Co.MC20 Tungsten Steel Notch Punch. This early research, headed by W.H. Carothers,RD50 Tungsten Steel Flat Needle, 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,KG7 Tungsten Steel Insert. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.SKD61 Division Tube,Tungsten Steel Notch 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.Son And Mother Punch, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Pulling Teeth And Punching Needles.

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,SKD61 Division Needle. In this process, ethylene is the polymer, the chemical building block of polyester,PG Optical Grinding Processing.

The Manufacturing
Process

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

Drying

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

Winding

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

K44 Tungsten Steel Fine Grinding Rod

Tungsten Steel Single Straight Hole Threaded Round Rod With, 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,TSF44 Tungsten Steel Carving Knife. The rope-JG Coordinate Grinding.

Drawing tow

• 1 Newly-Tungsten Carbide Steel.Stretch Stamping Die.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Stainless Steel LED Mould.Terminal Stamping Die.

Cutting

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

The Future

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