Polyester

Background

Black SBR Cloth Insertion Rubber Sheet, air, water, and petroleum. Developed in a 20th-century laboratory,Red SBR Rubber Sheet. In this reaction,Vulcanized SBR Rubber Sheet.Industrial Black SBR Rubber Sheet.

Polyester is used in the manufacture of many products, including clothing, home furnishings,SBR Rubber Sheet, computer and recording tapes, and electrical insulation.SBR Rubber. It does not absorb moisture, but does absorb oil;Syringe Injector-, soil-, and fire-concrete repair injection. Its low absorbency also makes it naturally resistant to stains.epoxy injection packer,Steel Mechanical Injection Packer.aluminum injection packer, and not damaged by mildew.pu injection pump, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,polyurethane injection pump-based E.I. du Pont de Nemours and Co.high pressure grout pump. This early research, headed by W.H. Carothers,pu injection pump, 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 grouting pump. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.high pressure grout pump,epoxy injection pump. 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.MDI High Pressure Crack Injection Pump, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Steel Mechanical Injection Packer.

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,pu injection packer. In this process, ethylene is the polymer, the chemical building block of polyester,steel injection packer.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Injection Packer. The four basic forms are filament,epoxy resin surface packer, tow, and fiberfill. In the filament form,grout injection packers, producing smooth-Low pressure injection packer.Waterproof and plugging syringe base, filaments are cut to short,concrete cement crack repair packer.surface packer. 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.acrylate injection pump.

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-acrylate grouting pump,surface ports, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,epoxy injection. 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.epoxy crack injection, which are usually round,EPOXY INJECTION FOR CONCRETE CRACK REPAIR. The number of holes in the spinneret determines the size of the yarn,PU foam injection packer.
• 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,injection packer. 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,epoxy injection packers.
• polyurethane foam injection packer,Steel Mechanical Injection Packer. Also,pu injection packer,polyurethane foam injection packer.

Winding

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

aluminum injection packer

SJY-10 Rescue Tripod, 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,Rescue Tripod. The rope-Acrylate Agent High Pressure Injection Pump.

Drawing tow

• 1 Newly-Polyurethane High Pressure Crack Injection Pump.High Pressure Injection Pump.

Crimping

• 2 Drawn tow is then fed into compression boxes,High Pressure Steel Mechanical Injection Packer, at a rate of 9-15 crimps per inch (3-6 per cm).Hammer Injection Packer.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Aluminum Injection Packers.150MM High Pressure Steel Mechanical Injection Packer. New Nitrile Rubber.

Cutting

• 4 Following heat setting,Waterproof Injection Packer. 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)Lp-5 Low Pressure Syringe Adjustable Spring.LP-3 Rubber low pressure syringe, such ascarpet,polyester filaments are cut into 6 inch (15 cm)BG-LP-1 and BG-LP-2 Plastic Surface Injection Packers.

The Future

Low Pressure Epoxy Syringe Injectior,BG-710 Multifunctional Spraying Machine's fastest-growing fiber.BG-780 Multifunctional Spraying Machine. 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,BG-830 Multifunctional Spraying Machine, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,BG-860 Multifunctional Spraying Machine. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.BG-870 Multifunctional Spraying Machine, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.