Polyester

Background

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

Polyester is used in the manufacture of many products, including clothing, home furnishings,Groove Rubber Stable Mat, computer and recording tapes, and electrical insulation.Hexagon Cow Stable Mat. It does not absorb moisture, but does absorb oil;Diamond Rubber Mat-, soil-, and fire-Rubber Powder Cow Stable Mat. Its low absorbency also makes it naturally resistant to stains.Hammer Groove Cow Stable Mat,Rubber Flooring.Checker Rubber Floor Mat, and not damaged by mildew.Rubber Floor Mat, 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.Skirt Board Rubber. This early research, headed by W.H. Carothers,FDA 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,FDA Rubber. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.High Temperature Resistant Silicone Rubber Sheet,Silicone 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 EPDM Rubber Sheet, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.EPDM 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 Viton Rubber Sheet. In this process, ethylene is the polymer, the chemical building block of polyester,FKM Rubber Sheeting.

The Manufacturing
Process

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

Drying

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

high pressure grout pump

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

Drawing tow

• 1 Newly-epoxy injection pump.MDI High Pressure Crack Injection Pump.

Crimping

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

Setting

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

Cutting

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

The Future

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