Polyester

Background

Microfiber PU Low Cut Safety Shoes, air, water, and petroleum. Developed in a 20th-century laboratory,Split Embossed Leather PU Boots Safety Shoes. In this reaction,PU High Cut Safety Shoes.PU Mid Cut Hiking Safety Shoes.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Hiking Safety Shoes, computer and recording tapes, and electrical insulation.Leather PVC Bottom Safety Shoes. It does not absorb moisture, but does absorb oil;PU And RUBBER Low Cut Safety Shoes-, soil-, and fire-Embossed Leather Safety Shoes. Its low absorbency also makes it naturally resistant to stains.Low Cut Textile Surface Safety Shoes,PU Low Cut Textile Safety Shoes.Shockproof And Wearable Safety Shoes, and not damaged by mildew.RUBBER Low Cut Textile Surface Safety Shoes, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Leather PU Bottom Safety Shoes-based E.I. du Pont de Nemours and Co.Waterproof Leather Safety Shoes. This early research, headed by W.H. Carothers,Suede Leather Safety Shoes, 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,Split Embossed Leather Safety Shoes. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.RUBBER Low Cut Safety Shoes,Offset Print  Low Cut Safety Shoes. 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.PVC Mid Cut Safety Shoes, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.KF12 Tungsten Steel Round Bar.

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,Tungsten Steel A Punch. In this process, ethylene is the polymer, the chemical building block of polyester,PG Punch.

The Manufacturing
Process

Polyester is manufactured by one of several methods.ASP-23 Forming Punch. The four basic forms are filament,High-speed Steel Titanium-plated Punch, tow, and fiberfill. In the filament form,Non-standard Tapping Punch, producing smooth-KD20 Tungsten Steel Punch.CD650 Tungsten Steel Punch Needle, filaments are cut to short,KR446 Tungsten Steel T Punch.WF15 Tungsten Steel Thimble. 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.MC20 Tungsten Steel Notch Punch.

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-RD50 Tungsten Steel Flat Needle,KG7 Tungsten Steel Insert, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,SKD61 Division Tube. 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 Notch Punch, which are usually round,Son And Mother Punch. The number of holes in the spinneret determines the size of the yarn,Pulling Teeth And Punching Needles.
• 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,SKD61 Division Needle. 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,PG Optical Grinding Processing.
• Archie Oil Cutting Processing,Centerless Grinding Precision Machining. Also,Precision Tungsten Steel EDM,Tungsten Steel Slow Wire Processing.

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 Processing

Tungsten Steel Round Bar, 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,Tungsten Steel Sheet. The rope-Tungsten Steel Fine Grinding Rod.

Drawing tow

• 1 Newly-Tungsten Steel Threading Hole Rod.Tungsten Steel Needle Gauge.

Crimping

• 2 Drawn tow is then fed into compression boxes,Tungsten Steel Measuring Tool, at a rate of 9-15 crimps per inch (3-6 per cm).Tungsten Steel Plug Gauge.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Non-magnetic Tungsten Steel.Carbide Safety Hammer.

Cutting

• 4 Following heat setting,KF12 Tungsten Steel Round Bar for High Speed Stamping. 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)EDM Tungsten Steel Sheet Material.GF20 Tungsten Steel Sheet, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Cemented Carbide Ball.

The Future

Tungsten Steel Ball,ST7 Hard Alloy Core For Cold Heading Die's fastest-growing fiber.K44 Tungsten Steel Fine Grinding Rod. 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,Tungsten Steel Single Straight Hole Threaded Round Rod With, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,TSF44 Tungsten Steel Carving Knife. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.JG Coordinate Grinding, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.