Polyester

Background

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

Polyester is used in the manufacture of many products, including clothing, home furnishings,Suede Leather Safety Shoes, computer and recording tapes, and electrical insulation.Split Embossed Leather Safety Shoes. It does not absorb moisture, but does absorb oil;RUBBER Low Cut Safety Shoes-, soil-, and fire-Offset Print  Low Cut Safety Shoes. Its low absorbency also makes it naturally resistant to stains.PVC Mid Cut Safety Shoes,KF12 Tungsten Steel Round Bar.Tungsten Steel A Punch, and not damaged by mildew.PG Punch, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,ASP-23 Forming Punch-based E.I. du Pont de Nemours and Co.High-speed Steel Titanium-plated Punch. This early research, headed by W.H. Carothers,Non-standard Tapping Punch, 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,KD20 Tungsten Steel Punch. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.CD650 Tungsten Steel Punch Needle,KR446 Tungsten Steel T Punch. 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.WF15 Tungsten Steel Thimble, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.MC20 Tungsten Steel Notch 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,RD50 Tungsten Steel Flat Needle. In this process, ethylene is the polymer, the chemical building block of polyester,KG7 Tungsten Steel Insert.

The Manufacturing
Process

Polyester is manufactured by one of several methods.SKD61 Division Tube. The four basic forms are filament,Tungsten Steel Notch Punch, tow, and fiberfill. In the filament form,Son And Mother Punch, producing smooth-Pulling Teeth And Punching Needles.SKD61 Division Needle, filaments are cut to short,PG Optical Grinding Processing.Archie Oil Cutting Processing. 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.Centerless Grinding Precision Machining.

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-Precision Tungsten Steel EDM,Tungsten Steel Slow Wire Processing, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Tungsten Steel Processing. 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.Tungsten Steel Round Bar, which are usually round,Tungsten Steel Sheet. The number of holes in the spinneret determines the size of the yarn,Tungsten Steel Fine Grinding Rod.
• 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 Threading Hole Rod. 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,Tungsten Steel Needle Gauge.
• Tungsten Steel Measuring Tool,Tungsten Steel Plug Gauge. Also,Non-magnetic Tungsten Steel,Carbide Safety Hammer.

Winding

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

KF12 Tungsten Steel Round Bar for High Speed Stamping

EDM Tungsten Steel Sheet Material, 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,GF20 Tungsten Steel Sheet. The rope-Cemented Carbide Ball.

Drawing tow

• 1 Newly-Tungsten Steel Ball.ST7 Hard Alloy Core For Cold Heading Die.

Crimping

• 2 Drawn tow is then fed into compression boxes,K44 Tungsten Steel Fine Grinding Rod, at a rate of 9-15 crimps per inch (3-6 per cm).Tungsten Steel Single Straight Hole Threaded Round Rod With.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)TSF44 Tungsten Steel Carving Knife.JG Coordinate Grinding.

Cutting

• 4 Following heat setting,Tungsten Carbide Steel. 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)Stretch Stamping Die.Powder Metallurgy Mold, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Motor Progressive Die.

The Future

Stainless Steel LED Mould,Terminal Stamping Die's fastest-growing fiber.Wire Drawing Core Die. 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,IC Semiconductor Packaging Mold, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Lead Frame Mold. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Lithium Battery Mould, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.