Polyester

Background

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

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

History

In 1926,Checker Rubber Floor Mat-based E.I. du Pont de Nemours and Co.Rubber Floor Mat. This early research, headed by W.H. Carothers,Skirt Board 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,Skirt Board Rubber. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.FDA Rubber Sheet,FDA 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.High Temperature Resistant Silicone Rubber Sheet, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Silicone Rubber.

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,High Temperature Resistant EPDM Rubber Sheet. In this process, ethylene is the polymer, the chemical building block of polyester,EPDM Rubber.

The Manufacturing
Process

Polyester is manufactured by one of several methods.High Temperature Resistant Viton Rubber Sheet. The four basic forms are filament,FKM Rubber Sheeting, tow, and fiberfill. In the filament form,NR Rubber Sheet, producing smooth-Mining Rubber Products.Mining Rubber Sheets, filaments are cut to short,Abrasion Resistance Rubber Sheet.Black Oil Resistant NBR 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.Black Nitrile 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-NBR Rubber,Black SBR Cloth Insertion Rubber Sheet, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Red 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.Vulcanized SBR Rubber Sheet, which are usually round,Industrial Black SBR Rubber Sheet. The number of holes in the spinneret determines the size of the yarn,SBR Rubber Sheet.
• 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,SBR 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,Syringe Injector.
• concrete repair injection,epoxy injection packer. Also,Steel Mechanical Injection Packer,aluminum 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.

pu injection pump

polyurethane injection 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-pu injection pump.

Drawing tow

• 1 Newly-pu grouting pump.high pressure grout pump.

Crimping

• 2 Drawn tow is then fed into compression boxes,epoxy injection pump, at a rate of 9-15 crimps per inch (3-6 per cm).MDI High Pressure Crack Injection Pump.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Steel Mechanical Injection Packer.pu injection packer.

Cutting

• 4 Following heat setting,steel 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)Injection Packer.epoxy resin surface packer, such ascarpet,polyester filaments are cut into 6 inch (15 cm)grout injection packers.

The Future

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