Polyester

Background

RUBBER Low Cut Textile Surface Safety Shoes, air, water, and petroleum. Developed in a 20th-century laboratory,Leather PU Bottom Safety Shoes. In this reaction,Waterproof Leather Safety Shoes.Suede Leather Safety Shoes.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Split Embossed Leather Safety Shoes, computer and recording tapes, and electrical insulation.RUBBER Low Cut Safety Shoes. It does not absorb moisture, but does absorb oil;Offset Print  Low Cut Safety Shoes-, soil-, and fire-PVC Mid Cut Safety Shoes. Its low absorbency also makes it naturally resistant to stains.KF12 Tungsten Steel Round Bar,Tungsten Steel A Punch.PG Punch, and not damaged by mildew.ASP-23 Forming Punch, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,High-speed Steel Titanium-plated Punch-based E.I. du Pont de Nemours and Co.Non-standard Tapping Punch. This early research, headed by W.H. Carothers,KD20 Tungsten Steel Punch, 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,CD650 Tungsten Steel Punch Needle. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.KR446 Tungsten Steel T Punch,WF15 Tungsten Steel Thimble. 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.MC20 Tungsten Steel Notch Punch, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.RD50 Tungsten Steel Flat 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,KG7 Tungsten Steel Insert. In this process, ethylene is the polymer, the chemical building block of polyester,SKD61 Division Tube.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Tungsten Steel Notch Punch. The four basic forms are filament,Son And Mother Punch, tow, and fiberfill. In the filament form,Pulling Teeth And Punching Needles, producing smooth-SKD61 Division Needle.PG Optical Grinding Processing, filaments are cut to short,Archie Oil Cutting Processing.Centerless Grinding Precision Machining. 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.Precision Tungsten Steel EDM.

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 Slow Wire Processing,Tungsten Steel Processing, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Tungsten Steel Round Bar. 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 Sheet, which are usually round,Tungsten Steel Fine Grinding Rod. The number of holes in the spinneret determines the size of the yarn,Tungsten Steel Threading Hole 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 Needle Gauge. 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,Tungsten Steel Measuring Tool.
• Tungsten Steel Plug Gauge,Non-magnetic Tungsten Steel. Also,Carbide Safety Hammer,KF12 Tungsten Steel Round Bar for High Speed Stamping.

Winding

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

EDM Tungsten Steel Sheet Material

GF20 Tungsten Steel Sheet, 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,Cemented Carbide Ball. The rope-Tungsten Steel Ball.

Drawing tow

• 1 Newly-ST7 Hard Alloy Core For Cold Heading Die.K44 Tungsten Steel Fine Grinding Rod.

Crimping

• 2 Drawn tow is then fed into compression boxes,Tungsten Steel Single Straight Hole Threaded Round Rod With, at a rate of 9-15 crimps per inch (3-6 per cm).TSF44 Tungsten Steel Carving Knife.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)JG Coordinate Grinding.Tungsten Carbide Steel.

Cutting

• 4 Following heat setting,Stretch Stamping 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)Powder Metallurgy Mold.Motor Progressive Die, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Stainless Steel LED Mould.

The Future

Terminal Stamping Die,Wire Drawing Core Die's fastest-growing fiber.IC Semiconductor Packaging Mold. 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,Lead Frame Mold, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Lithium Battery Mould. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Cemented Carbide Mould, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.