Polyester

Background

Cloth Inserted EPDM Rubber Sheet, air, water, and petroleum. Developed in a 20th-century laboratory,High Quality Aging Resistant EPDM Rubber Sheet. In this reaction,FKM Rubber Sheet.High Temperature Resistant Viton Rubber Sheet.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Ozone Resistant Viton Rubber Sheet, computer and recording tapes, and electrical insulation.Abrasion Resistance Sheet Rubber. It does not absorb moisture, but does absorb oil;Abrasion Resistance Rubber Sheet-, soil-, and fire-Mining Rubber Sheets. Its low absorbency also makes it naturally resistant to stains.Mining Rubber Products,Nitrile Rubber Sheet Supplier.NBR Rubber Sheet, and not damaged by mildew.Black Oil Resistant NBR Rubber Sheet, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,SBR Rubber Sheet-based E.I. du Pont de Nemours and Co.Industrial Black SBR Rubber Sheet. This early research, headed by W.H. Carothers,Vulcanized SBR 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,Abrasion Resistant Red SBR Rubber Sheet. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Red SBR Rubber Sheet,Black SBR 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.Black SBR Cloth Insertion Rubber Sheet, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Groove Rubber Stable Mat.

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,Hexagon Cow Stable Mat. In this process, ethylene is the polymer, the chemical building block of polyester,Diamond Rubber Mat.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Rubber Powder Cow Stable Mat. The four basic forms are filament,Hammer Groove Cow Stable Mat, tow, and fiberfill. In the filament form,Rubber Flooring, producing smooth-Checker Rubber Floor Mat.Rubber Floor Mat, filaments are cut to short,Skirt Board Rubber.Skirt Board 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.FDA 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-FDA Rubber,High Temperature Resistant Silicone Rubber Sheet, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Silicone Rubber. 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.High Temperature Resistant EPDM Rubber Sheet, which are usually round,EPDM Rubber. The number of holes in the spinneret determines the size of the yarn,High Temperature Resistant Viton 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,FKM Rubber Sheeting. 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,NR Rubber Sheet.
• Mining Rubber Products,Mining Rubber Sheets. Also,Abrasion Resistance Rubber Sheet,Black Oil Resistant NBR Rubber Sheet.

Winding

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

Black Nitrile Rubber Sheet

NBR Rubber, 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,Black SBR Cloth Insertion Rubber Sheet. The rope-Red SBR Rubber Sheet.

Drawing tow

• 1 Newly-Vulcanized SBR Rubber Sheet.Industrial Black SBR Rubber Sheet.

Crimping

• 2 Drawn tow is then fed into compression boxes,SBR Rubber Sheet, at a rate of 9-15 crimps per inch (3-6 per cm).SBR Rubber.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Syringe Injector.concrete repair injection.

Cutting

• 4 Following heat setting,epoxy 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)Steel Mechanical Injection Packer.aluminum injection packer, such ascarpet,polyester filaments are cut into 6 inch (15 cm)pu injection pump.

The Future

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