Polyester

Background

Suede Leather Safety Shoes, air, water, and petroleum. Developed in a 20th-century laboratory,Split Embossed Leather Safety Shoes. In this reaction,RUBBER Low Cut Safety Shoes.Offset Print  Low Cut Safety Shoes.

Polyester is used in the manufacture of many products, including clothing, home furnishings,PVC Mid Cut Safety Shoes, computer and recording tapes, and electrical insulation.KF12 Tungsten Steel Round Bar. It does not absorb moisture, but does absorb oil;Tungsten Steel A Punch-, soil-, and fire-PG Punch. Its low absorbency also makes it naturally resistant to stains.ASP-23 Forming Punch,High-speed Steel Titanium-plated Punch.Non-standard Tapping Punch, and not damaged by mildew.KD20 Tungsten Steel Punch, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

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

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,Son And Mother Punch. In this process, ethylene is the polymer, the chemical building block of polyester,Pulling Teeth And Punching Needles.

The Manufacturing
Process

Polyester is manufactured by one of several methods.SKD61 Division Needle. The four basic forms are filament,PG Optical Grinding Processing, tow, and fiberfill. In the filament form,Archie Oil Cutting Processing, producing smooth-Centerless Grinding Precision Machining.Precision Tungsten Steel EDM, filaments are cut to short,Tungsten Steel Slow Wire Processing.Tungsten Steel Processing. 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 Round Bar.

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 Sheet,Tungsten Steel Fine Grinding Rod, is extruded through a slot to form long ribbons.

Drying

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

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 Ball

ST7 Hard Alloy Core For Cold Heading Die, 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,K44 Tungsten Steel Fine Grinding Rod. The rope-Tungsten Steel Single Straight Hole Threaded Round Rod With.

Drawing tow

• 1 Newly-TSF44 Tungsten Steel Carving Knife.JG Coordinate Grinding.

Crimping

• 2 Drawn tow is then fed into compression boxes,Tungsten Carbide Steel, at a rate of 9-15 crimps per inch (3-6 per cm).Stretch Stamping Die.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Powder Metallurgy Mold.Motor Progressive Die.

Cutting

• 4 Following heat setting,Stainless Steel LED Mould. 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)Terminal Stamping Die.Wire Drawing Core Die, such ascarpet,polyester filaments are cut into 6 inch (15 cm)IC Semiconductor Packaging Mold.

The Future

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