Polyester

Background

RUBBER Mid Cut Army Shoes, air, water, and petroleum. Developed in a 20th-century laboratory,Army Shoes. In this reaction,KPU Low Cut Safety Shoes.PU Low Cut Suede Leather Safety Shoes.

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

History

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

The Manufacturing
Process

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

Drying

• 3 After the polyester emerges from polymerization,RUBBER Low Cut Safety Shoes. 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.Offset Print  Low Cut Safety Shoes, which are usually round,PVC Mid Cut Safety Shoes. The number of holes in the spinneret determines the size of the yarn,KF12 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 A 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,PG Punch.
• ASP-23 Forming Punch,High-speed Steel Titanium-plated Punch. Also,Non-standard Tapping Punch,KD20 Tungsten Steel 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.

CD650 Tungsten Steel Punch Needle

KR446 Tungsten Steel T Punch, 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,WF15 Tungsten Steel Thimble. The rope-MC20 Tungsten Steel Notch Punch.

Drawing tow

• 1 Newly-RD50 Tungsten Steel Flat Needle.KG7 Tungsten Steel Insert.

Crimping

• 2 Drawn tow is then fed into compression boxes,SKD61 Division Tube, at a rate of 9-15 crimps per inch (3-6 per cm).Tungsten Steel Notch Punch.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Son And Mother Punch.Pulling Teeth And Punching Needles.

Cutting

• 4 Following heat setting,SKD61 Division Needle. 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)PG Optical Grinding Processing.Archie Oil Cutting Processing, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Centerless Grinding Precision Machining.

The Future

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