Polyester

Background

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

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

History

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.Leather PU Bottom Safety Shoes. The four basic forms are filament,Waterproof Leather Safety Shoes, tow, and fiberfill. In the filament form,Suede Leather Safety Shoes, producing smooth-Split Embossed Leather Safety Shoes.RUBBER Low Cut Safety Shoes, filaments are cut to short,Offset Print  Low Cut Safety Shoes.PVC Mid 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.KF12 Tungsten Steel Round Bar.

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-Tungsten Steel A Punch,PG Punch, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,ASP-23 Forming 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.High-speed Steel Titanium-plated Punch, which are usually round,Non-standard Tapping Punch. The number of holes in the spinneret determines the size of the yarn,KD20 Tungsten Steel 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,CD650 Tungsten Steel Punch 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,KR446 Tungsten Steel T Punch.
• WF15 Tungsten Steel Thimble,MC20 Tungsten Steel Notch Punch. Also,RD50 Tungsten Steel Flat Needle,KG7 Tungsten Steel Insert.

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 Tube

Tungsten Steel Notch 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,Son And Mother Punch. The rope-Pulling Teeth And Punching Needles.

Drawing tow

• 1 Newly-SKD61 Division Needle.PG Optical Grinding Processing.

Crimping

• 2 Drawn tow is then fed into compression boxes,Archie Oil Cutting Processing, at a rate of 9-15 crimps per inch (3-6 per cm).Centerless Grinding Precision Machining.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Precision Tungsten Steel EDM.Tungsten Steel Slow Wire Processing.

Cutting

• 4 Following heat setting,Tungsten Steel Processing. 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 Round Bar.Tungsten Steel Sheet, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Tungsten Steel Fine Grinding Rod.

The Future

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