Polyester

Background

Rubber Floor Mat, air, water, and petroleum. Developed in a 20th-century laboratory,Skirt Board Rubber. In this reaction,Skirt Board Rubber.FDA Rubber Sheet.

Polyester is used in the manufacture of many products, including clothing, home furnishings,FDA Rubber, computer and recording tapes, and electrical insulation.High Temperature Resistant Silicone Rubber Sheet. It does not absorb moisture, but does absorb oil;Silicone Rubber-, soil-, and fire-High Temperature Resistant EPDM Rubber Sheet. Its low absorbency also makes it naturally resistant to stains.EPDM Rubber,High Temperature Resistant Viton Rubber Sheet.FKM Rubber Sheeting, and not damaged by mildew.NR Rubber Sheet, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Mining Rubber Products-based E.I. du Pont de Nemours and Co.Mining Rubber Sheets. This early research, headed by W.H. Carothers,Abrasion Resistance Rubber Sheet, 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,Black Oil Resistant NBR Rubber Sheet. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Black Nitrile Rubber Sheet,NBR Rubber. 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.Black SBR Cloth Insertion Rubber Sheet, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Red SBR Rubber Sheet.

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,Vulcanized SBR Rubber Sheet. In this process, ethylene is the polymer, the chemical building block of polyester,Industrial Black SBR Rubber Sheet.

The Manufacturing
Process

Polyester is manufactured by one of several methods.SBR Rubber Sheet. The four basic forms are filament,SBR Rubber, tow, and fiberfill. In the filament form,Syringe Injector, producing smooth-concrete repair injection.epoxy injection packer, filaments are cut to short,Steel Mechanical Injection Packer.aluminum injection 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.pu 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-polyurethane injection pump,high pressure grout pump, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,pu 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.pu grouting pump, which are usually round,high pressure grout pump. The number of holes in the spinneret determines the size of the yarn,epoxy injection pump.
• 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,MDI High Pressure Crack Injection Pump. 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,Steel Mechanical Injection Packer.
• pu injection packer,steel injection packer. Also,Injection Packer,epoxy resin surface 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.

grout injection packers

Low pressure injection packer, 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,Waterproof and plugging syringe base. The rope-concrete cement crack repair packer.

Drawing tow

• 1 Newly-surface packer.acrylate injection pump.

Crimping

• 2 Drawn tow is then fed into compression boxes,acrylate grouting pump, at a rate of 9-15 crimps per inch (3-6 per cm).surface ports.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)epoxy injection.epoxy crack injection.

Cutting

• 4 Following heat setting,EPOXY INJECTION FOR CONCRETE CRACK REPAIR. 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)PU foam injection packer.injection packer, such ascarpet,polyester filaments are cut into 6 inch (15 cm)epoxy injection packers.

The Future

polyurethane foam injection packer,Steel Mechanical Injection Packer's fastest-growing fiber.pu injection packer. 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,polyurethane foam injection packer, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,aluminum injection packer. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.SJY-10 Rescue Tripod, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.