Polyester

Background

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

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

History

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

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,Suede Leather Safety Shoes. In this process, ethylene is the polymer, the chemical building block of polyester,Split Embossed Leather Safety Shoes.

The Manufacturing
Process

Polyester is manufactured by one of several methods.RUBBER Low Cut Safety Shoes. The four basic forms are filament,Offset Print  Low Cut Safety Shoes, tow, and fiberfill. In the filament form,PVC Mid Cut Safety Shoes, producing smooth-KF12 Tungsten Steel Round Bar.Tungsten Steel A Punch, filaments are cut to short,PG Punch.ASP-23 Forming Punch. 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.High-speed Steel Titanium-plated 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-Non-standard Tapping Punch,KD20 Tungsten Steel Punch, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,CD650 Tungsten Steel Punch Needle. 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.KR446 Tungsten Steel T Punch, which are usually round,WF15 Tungsten Steel Thimble. The number of holes in the spinneret determines the size of the yarn,MC20 Tungsten Steel Notch Punch.
• 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,RD50 Tungsten Steel Flat 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,KG7 Tungsten Steel Insert.
• SKD61 Division Tube,Tungsten Steel Notch Punch. Also,Son And Mother Punch,Pulling Teeth And Punching Needles.

Winding

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

SKD61 Division Needle

PG Optical Grinding Processing, 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,Archie Oil Cutting Processing. The rope-Centerless Grinding Precision Machining.

Drawing tow

• 1 Newly-Precision Tungsten Steel EDM.Tungsten Steel Slow Wire Processing.

Crimping

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

Setting

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

Cutting

• 4 Following heat setting,Tungsten Steel Threading Hole Rod. 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)Tungsten Steel Needle Gauge.Tungsten Steel Measuring Tool, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Tungsten Steel Plug Gauge.

The Future

Non-magnetic Tungsten Steel,Carbide Safety Hammer's fastest-growing fiber.KF12 Tungsten Steel Round Bar for High Speed Stamping. 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,EDM Tungsten Steel Sheet Material, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,GF20 Tungsten Steel Sheet. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Cemented Carbide Ball, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.