Polyester

Background

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

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

History

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

The Manufacturing
Process

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

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-NR Rubber Sheet,Mining Rubber Products, is extruded through a slot to form long ribbons.

Drying

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

SBR Rubber

Syringe Injector, 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,concrete repair injection. The rope-epoxy injection packer.

Drawing tow

• 1 Newly-Steel Mechanical Injection Packer.aluminum injection packer.

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).polyurethane injection pump.

Setting

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

Cutting

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

The Future

Steel Mechanical Injection Packer,pu injection packer's fastest-growing fiber.steel 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 resin surface packer. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.grout injection packers, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.