Polyester

Background

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

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

History

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.Silicone Rubber. The four basic forms are filament,High Temperature Resistant EPDM Rubber Sheet, tow, and fiberfill. In the filament form,EPDM Rubber, producing smooth-High Temperature Resistant Viton Rubber Sheet.FKM Rubber Sheeting, filaments are cut to short,NR Rubber Sheet.Mining Rubber Products. 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.Mining Rubber Sheets.

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-Abrasion Resistance Rubber Sheet,Black Oil Resistant NBR Rubber Sheet, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Black Nitrile 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.NBR Rubber, which are usually round,Black SBR Cloth Insertion Rubber Sheet. The number of holes in the spinneret determines the size of the yarn,Red 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,Vulcanized SBR Rubber Sheet. 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,Industrial Black SBR Rubber Sheet.
• SBR Rubber Sheet,SBR Rubber. Also,Syringe Injector,concrete repair injection.

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 injection packer

Steel Mechanical 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,aluminum injection packer. The rope-pu injection pump.

Drawing tow

• 1 Newly-polyurethane injection pump.high pressure grout pump.

Crimping

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

Setting

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

Cutting

• 4 Following heat setting,MDI High Pressure Crack Injection Pump. 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)Steel Mechanical Injection Packer.pu injection packer, such ascarpet,polyester filaments are cut into 6 inch (15 cm)steel injection packer.

The Future

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