Polyester

Background

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

Polyester is used in the manufacture of many products, including clothing, home furnishings,Hexagon Cow Stable Mat, computer and recording tapes, and electrical insulation.Diamond Rubber Mat. It does not absorb moisture, but does absorb oil;Rubber Powder Cow Stable Mat-, soil-, and fire-Hammer Groove Cow Stable Mat. Its low absorbency also makes it naturally resistant to stains.Rubber Flooring,Checker Rubber Floor Mat.Rubber Floor Mat, and not damaged by mildew.Skirt Board Rubber, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Skirt Board Rubber-based E.I. du Pont de Nemours and Co.FDA Rubber Sheet. This early research, headed by W.H. Carothers,FDA Rubber, 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,High Temperature Resistant Silicone Rubber Sheet. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Silicone Rubber,High Temperature Resistant EPDM 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.EPDM Rubber, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.High Temperature Resistant Viton 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,FKM Rubber Sheeting. In this process, ethylene is the polymer, the chemical building block of polyester,NR Rubber Sheet.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Mining Rubber Products. The four basic forms are filament,Mining Rubber Sheets, tow, and fiberfill. In the filament form,Abrasion Resistance Rubber Sheet, producing smooth-Black Oil Resistant NBR Rubber Sheet.Black Nitrile Rubber Sheet, filaments are cut to short,NBR Rubber.Black SBR Cloth Insertion Rubber Sheet. 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.Red SBR Rubber Sheet.

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-Vulcanized SBR Rubber Sheet,Industrial Black SBR Rubber Sheet, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,SBR Rubber Sheet. 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.SBR Rubber, which are usually round,Syringe Injector. The number of holes in the spinneret determines the size of the yarn,concrete repair injection.
• 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 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,Steel Mechanical Injection Packer.
• aluminum injection packer,pu injection pump. Also,polyurethane injection pump,high pressure grout pump.

Winding

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

pu injection pump

pu grouting pump, 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,high pressure grout pump. The rope-epoxy injection pump.

Drawing tow

• 1 Newly-MDI High Pressure Crack Injection Pump.Steel Mechanical Injection Packer.

Crimping

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

Setting

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

Cutting

• 4 Following heat setting,grout injection packers. 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)Low pressure injection packer.Waterproof and plugging syringe base, such ascarpet,polyester filaments are cut into 6 inch (15 cm)concrete cement crack repair packer.

The Future

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