Polyester

Background

Diamond Rubber Mat, air, water, and petroleum. Developed in a 20th-century laboratory,Rubber Powder Cow Stable Mat. In this reaction,Hammer Groove Cow Stable Mat.Rubber Flooring.

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

History

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.NBR Rubber. The four basic forms are filament,Black SBR Cloth Insertion Rubber Sheet, tow, and fiberfill. In the filament form,Red SBR Rubber Sheet, producing smooth-Vulcanized SBR Rubber Sheet.Industrial Black SBR Rubber Sheet, filaments are cut to short,SBR Rubber Sheet.SBR Rubber. 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.Syringe Injector.

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-concrete repair injection,epoxy injection packer, is extruded through a slot to form long ribbons.

Drying

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

Steel Mechanical Injection Packer

pu 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,steel injection packer. The rope-Injection Packer.

Drawing tow

• 1 Newly-epoxy resin surface packer.grout injection packers.

Crimping

• 2 Drawn tow is then fed into compression boxes,Low pressure injection packer, at a rate of 9-15 crimps per inch (3-6 per cm).Waterproof and plugging syringe base.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)concrete cement crack repair packer.surface packer.

Cutting

• 4 Following heat setting,acrylate 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)acrylate grouting pump.surface ports, such ascarpet,polyester filaments are cut into 6 inch (15 cm)epoxy injection.

The Future

epoxy crack injection,EPOXY INJECTION FOR CONCRETE CRACK REPAIR's fastest-growing fiber.PU foam 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,injection packer, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,epoxy injection packers. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.polyurethane foam 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.