Polyester

Background

Low Cut Textile Surface Safety Shoes, air, water, and petroleum. Developed in a 20th-century laboratory,PU Low Cut Textile Safety Shoes. In this reaction,Shockproof And Wearable Safety Shoes.RUBBER Low Cut Textile Surface Safety Shoes.

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

History

In 1926,Tungsten Steel A Punch-based E.I. du Pont de Nemours and Co.PG Punch. This early research, headed by W.H. Carothers,ASP-23 Forming 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,High-speed Steel Titanium-plated Punch. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Non-standard Tapping Punch,KD20 Tungsten Steel 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.CD650 Tungsten Steel Punch Needle, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.KR446 Tungsten Steel T 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,WF15 Tungsten Steel Thimble. In this process, ethylene is the polymer, the chemical building block of polyester,MC20 Tungsten Steel Notch Punch.

The Manufacturing
Process

Polyester is manufactured by one of several methods.RD50 Tungsten Steel Flat Needle. The four basic forms are filament,KG7 Tungsten Steel Insert, tow, and fiberfill. In the filament form,SKD61 Division Tube, producing smooth-Tungsten Steel Notch Punch.Son And Mother Punch, filaments are cut to short,Pulling Teeth And Punching Needles.SKD61 Division Needle. 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.PG Optical Grinding Processing.

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-Archie Oil Cutting Processing,Centerless Grinding Precision Machining, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Precision Tungsten Steel EDM. 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 Slow Wire Processing, which are usually round,Tungsten Steel Processing. The number of holes in the spinneret determines the size of the yarn,Tungsten Steel Round Bar.
• 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 Sheet. 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 Fine Grinding Rod.
• Tungsten Steel Threading Hole Rod,Tungsten Steel Needle Gauge. Also,Tungsten Steel Measuring Tool,Tungsten Steel Plug Gauge.

Winding

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

Non-magnetic Tungsten Steel

Carbide Safety Hammer, 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,KF12 Tungsten Steel Round Bar for High Speed Stamping. The rope-EDM Tungsten Steel Sheet Material.

Drawing tow

• 1 Newly-GF20 Tungsten Steel Sheet.Cemented Carbide Ball.

Crimping

• 2 Drawn tow is then fed into compression boxes,Tungsten Steel Ball, at a rate of 9-15 crimps per inch (3-6 per cm).ST7 Hard Alloy Core For Cold Heading Die.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)K44 Tungsten Steel Fine Grinding Rod.Tungsten Steel Single Straight Hole Threaded Round Rod With.

Cutting

• 4 Following heat setting,TSF44 Tungsten Steel Carving Knife. 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)JG Coordinate Grinding.Tungsten Carbide Steel, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Stretch Stamping Die.

The Future

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