Polyester

Background

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

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

History

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.Industrial Black SBR Rubber Sheet. The four basic forms are filament,SBR Rubber Sheet, tow, and fiberfill. In the filament form,SBR Rubber, producing smooth-Syringe Injector.concrete repair injection, filaments are cut to short,epoxy injection packer.Steel Mechanical 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.aluminum injection packer.

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-pu injection pump,polyurethane injection pump, is extruded through a slot to form long ribbons.

Drying

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

epoxy resin surface packer

grout injection packers, 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,Low pressure injection packer. The rope-Waterproof and plugging syringe base.

Drawing tow

• 1 Newly-concrete cement crack repair packer.surface packer.

Crimping

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

Setting

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

Cutting

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

The Future

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