Polyester

Background

High Temperature Resistant Viton Rubber Sheet, air, water, and petroleum. Developed in a 20th-century laboratory,FKM Rubber Sheeting. In this reaction,NR Rubber Sheet.Mining Rubber Products.

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

History

In 1926,Industrial Black SBR Rubber Sheet-based E.I. du Pont de Nemours and Co.SBR Rubber Sheet. This early research, headed by W.H. Carothers,SBR Rubber, 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,Syringe Injector. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.concrete repair injection,epoxy injection packer. 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.Steel Mechanical Injection Packer, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.aluminum injection packer.

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,pu injection pump. In this process, ethylene is the polymer, the chemical building block of polyester,polyurethane injection pump.

The Manufacturing
Process

Polyester is manufactured by one of several methods.high pressure grout pump. The four basic forms are filament,pu injection pump, tow, and fiberfill. In the filament form,pu grouting pump, producing smooth-high pressure grout pump.epoxy injection pump, filaments are cut to short,MDI High Pressure Crack Injection Pump.Steel Mechanical Injection Packer. 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.pu 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 injection packer,Injection Packer, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,epoxy resin surface packer. 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.grout injection packers, which are usually round,Low pressure injection packer. The number of holes in the spinneret determines the size of the yarn,Waterproof and plugging syringe base.
• 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 cement crack repair packer. 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,surface packer.
• acrylate injection pump,acrylate grouting pump. Also,surface ports,epoxy injection.

Winding

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

epoxy crack injection

EPOXY INJECTION FOR CONCRETE CRACK REPAIR, 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 foam injection packer. The rope-injection packer.

Drawing tow

• 1 Newly-epoxy injection packers.polyurethane foam injection packer.

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)polyurethane foam injection packer.aluminum injection packer.

Cutting

• 4 Following heat setting,SJY-10 Rescue Tripod. 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)Rescue Tripod.Acrylate Agent High Pressure Injection Pump, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Polyurethane High Pressure Crack Injection Pump.

The Future

High Pressure Injection Pump,High Pressure Steel Mechanical Injection Packer's fastest-growing fiber.Hammer 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,Aluminum Injection Packers, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,150MM High Pressure Steel Mechanical Injection Packer. New Nitrile Rubber. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Waterproof 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.