Polyester

Background

Mining Rubber Products, air, water, and petroleum. Developed in a 20th-century laboratory,Nitrile Rubber Sheet Supplier. In this reaction,NBR Rubber Sheet.Black Oil Resistant NBR Rubber Sheet.

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

History

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

The Manufacturing
Process

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

Drying

• 3 After the polyester emerges from polymerization,Abrasion Resistance 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.Black Oil Resistant NBR Rubber Sheet, which are usually round,Black Nitrile Rubber Sheet. The number of holes in the spinneret determines the size of the yarn,NBR Rubber.
• 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,Black SBR Cloth Insertion 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,Red SBR Rubber Sheet.
• Vulcanized SBR Rubber Sheet,Industrial Black SBR Rubber Sheet. Also,SBR Rubber Sheet,SBR Rubber.

Winding

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

Syringe Injector

concrete repair injection, 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,epoxy injection packer. The rope-Steel Mechanical Injection Packer.

Drawing tow

• 1 Newly-aluminum injection packer.pu injection pump.

Crimping

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

Setting

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

Cutting

• 4 Following heat setting,high pressure grout 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)epoxy injection pump.MDI High Pressure Crack Injection Pump, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Steel Mechanical Injection Packer.

The Future

pu injection packer,steel injection packer's fastest-growing fiber.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,epoxy resin surface packer, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,grout injection packers. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Low pressure 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.