Polyester

Background

Antistatic protective Safety Shoes, air, water, and petroleum. Developed in a 20th-century laboratory,PU And RUBBER Leather Low Cut Safety Shoes. In this reaction,PU Low Cut Split Embossed Leather Safety Shoes.Leather Surface PU Safety Shoes.

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

History

In 1926,Microfiber PU Low Cut Safety Shoes-based E.I. du Pont de Nemours and Co.Split Embossed Leather PU Boots Safety Shoes. This early research, headed by W.H. Carothers,PU High Cut 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 Mid Cut Hiking Safety Shoes. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Hiking Safety Shoes,Leather PVC Bottom 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.PU And RUBBER Low Cut Safety Shoes, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Embossed 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,Low Cut Textile Surface Safety Shoes. In this process, ethylene is the polymer, the chemical building block of polyester,PU Low Cut Textile Safety Shoes.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Shockproof And Wearable Safety Shoes. The four basic forms are filament,RUBBER Low Cut Textile Surface Safety Shoes, tow, and fiberfill. In the filament form,Leather PU Bottom Safety Shoes, producing smooth-Waterproof Leather Safety Shoes.Suede Leather Safety Shoes, filaments are cut to short,Split Embossed Leather Safety Shoes.RUBBER Low Cut Safety Shoes. 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.Offset Print  Low Cut Safety Shoes.

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-PVC Mid Cut Safety Shoes,KF12 Tungsten Steel Round Bar, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Tungsten Steel A Punch. 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.PG Punch, which are usually round,ASP-23 Forming Punch. The number of holes in the spinneret determines the size of the yarn,High-speed Steel Titanium-plated 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,Non-standard Tapping Punch. 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,KD20 Tungsten Steel Punch.
• CD650 Tungsten Steel Punch Needle,KR446 Tungsten Steel T Punch. Also,WF15 Tungsten Steel Thimble,MC20 Tungsten Steel Notch Punch.

Winding

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

RD50 Tungsten Steel Flat Needle

KG7 Tungsten Steel Insert, 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,SKD61 Division Tube. The rope-Tungsten Steel Notch Punch.

Drawing tow

• 1 Newly-Son And Mother Punch.Pulling Teeth And Punching Needles.

Crimping

• 2 Drawn tow is then fed into compression boxes,SKD61 Division Needle, at a rate of 9-15 crimps per inch (3-6 per cm).PG Optical Grinding Processing.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Archie Oil Cutting Processing.Centerless Grinding Precision Machining.

Cutting

• 4 Following heat setting,Precision Tungsten Steel EDM. 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 Slow Wire Processing.Tungsten Steel Processing, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Tungsten Steel Round Bar.

The Future

Tungsten Steel Sheet,Tungsten Steel Fine Grinding Rod's fastest-growing fiber.Tungsten Steel Threading Hole 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 Needle Gauge, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Tungsten Steel Measuring Tool. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Tungsten Steel Plug Gauge, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.