Polyester

Background

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

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

History

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

The Manufacturing
Process

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

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-Steel Mechanical Injection Packer,aluminum injection packer, is extruded through a slot to form long ribbons.

Drying

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

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 injection packer

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,epoxy resin surface packer. The rope-grout injection packers.

Drawing tow

• 1 Newly-Low pressure injection packer.Waterproof and plugging syringe base.

Crimping

• 2 Drawn tow is then fed into compression boxes,concrete cement crack repair packer, at a rate of 9-15 crimps per inch (3-6 per cm).surface packer.

Setting

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

Cutting

• 4 Following heat setting,surface ports. 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.epoxy crack injection, such ascarpet,polyester filaments are cut into 6 inch (15 cm)EPOXY INJECTION FOR CONCRETE CRACK REPAIR.

The Future

PU foam injection packer,injection packer's fastest-growing fiber.epoxy injection packers. 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,polyurethane foam injection packer, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Steel Mechanical Injection Packer. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.pu 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.