Polyester

Background

pu grouting pump, air, water, and petroleum. Developed in a 20th-century laboratory,high pressure grout pump. In this reaction,epoxy injection pump.MDI High Pressure Crack Injection Pump.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Steel Mechanical Injection Packer, computer and recording tapes, and electrical insulation.pu injection packer. It does not absorb moisture, but does absorb oil;steel injection packer-, soil-, and fire-Injection Packer. Its low absorbency also makes it naturally resistant to stains.epoxy resin surface packer,grout injection packers.Low pressure injection packer, and not damaged by mildew.Waterproof and plugging syringe base, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,concrete cement crack repair packer-based E.I. du Pont de Nemours and Co.surface packer. This early research, headed by W.H. Carothers,acrylate 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,acrylate grouting pump. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.surface ports,epoxy injection. 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.epoxy crack injection, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.EPOXY INJECTION FOR CONCRETE CRACK REPAIR.

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.epoxy injection packers. The four basic forms are filament,polyurethane foam injection packer, tow, and fiberfill. In the filament form,Steel Mechanical Injection Packer, producing smooth-pu injection packer.polyurethane foam injection packer, filaments are cut to short,aluminum injection packer.SJY-10 Rescue Tripod. 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.Rescue Tripod.

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 Agent High Pressure Injection Pump,Polyurethane High Pressure Crack Injection Pump, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,High Pressure Injection Pump. 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 Pressure Steel Mechanical Injection Packer, which are usually round,Hammer Injection Packer. The number of holes in the spinneret determines the size of the yarn,Aluminum Injection Packers.
• 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,150MM High Pressure Steel Mechanical Injection Packer. New Nitrile Rubber. 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,Waterproof Injection Packer.
• Lp-5 Low Pressure Syringe Adjustable Spring,LP-3 Rubber low pressure syringe. Also,BG-LP-1 and BG-LP-2 Plastic Surface Injection Packers,Low Pressure Epoxy Syringe Injectior.

Winding

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

BG-710 Multifunctional Spraying Machine

BG-780 Multifunctional Spraying Machine, 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,BG-830 Multifunctional Spraying Machine. The rope-BG-860 Multifunctional Spraying Machine.

Drawing tow

• 1 Newly-BG-870 Multifunctional Spraying Machine.BG-930 Multifunctional Spraying Machine.

Crimping

• 2 Drawn tow is then fed into compression boxes,Multifunctional Cement Mortar Spraying Machine, at a rate of 9-15 crimps per inch (3-6 per cm).Cement Mortar Spray Machine.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Food Additives.PS Phosphatidylserine.

Cutting

• 4 Following heat setting,Phosphatidylserine. 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)super soya lecithin.Soy Lecithin granules, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Soyabean Lecithin.

The Future

Soy Lecithin Powder,Soya Lecithin's fastest-growing fiber.Food Additives. 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,Natural Phospholipids, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Natural Lecithin. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Modified Lecithin, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.