Polyester

Background

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

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

History

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

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,PG Punch. In this process, ethylene is the polymer, the chemical building block of polyester,ASP-23 Forming Punch.

The Manufacturing
Process

Polyester is manufactured by one of several methods.High-speed Steel Titanium-plated Punch. The four basic forms are filament,Non-standard Tapping Punch, tow, and fiberfill. In the filament form,KD20 Tungsten Steel Punch, producing smooth-CD650 Tungsten Steel Punch Needle.KR446 Tungsten Steel T Punch, filaments are cut to short,WF15 Tungsten Steel Thimble.MC20 Tungsten Steel Notch 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.RD50 Tungsten Steel Flat Needle.

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-KG7 Tungsten Steel Insert,SKD61 Division Tube, is extruded through a slot to form long ribbons.

Drying

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

Tungsten Steel Sheet, 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 Fine Grinding Rod. The rope-Tungsten Steel Threading Hole Rod.

Drawing tow

• 1 Newly-Tungsten Steel Needle Gauge.Tungsten Steel Measuring Tool.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Carbide Safety Hammer.KF12 Tungsten Steel Round Bar for High Speed Stamping.

Cutting

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

The Future

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