Polyester

Background

Plate Fin Oil Cooler, air, water, and petroleum. Developed in a 20th-century laboratory,Tube Belt Oil Cooler. In this reaction,Universal Oil Cooler.Aluminum Bar and Plate Intercooler.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Universal Front Mount Intercooler, computer and recording tapes, and electrical insulation.Aluminum Radiator Core. It does not absorb moisture, but does absorb oil;Auto Plastic Aluminum Radiator-, soil-, and fire-Radiators with Plastic Tank. Its low absorbency also makes it naturally resistant to stains.All Aluminum Radiator,Cooling System.Aluminum Welded Tube, and not damaged by mildew.Radiator aluminum flat tube, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Aluminum intercooler rectangular tube-based E.I. du Pont de Nemours and Co.Composite condenser Tube. This early research, headed by W.H. Carothers,Heat Sink Aluminum Oil Cooler Tube, 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,Aluminium Multi channel Tube. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Extruded Radiator Tubes,High frequency welded condenser tube. 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.Aluminium Micro channel Tube, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.High Frequency Oil Cooler Tube.

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,Checker Rubber Floor Mat. In this process, ethylene is the polymer, the chemical building block of polyester,Rubber Mat.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Black Butyl Rubber Sheet. The four basic forms are filament,Skirt Board Rubber, tow, and fiberfill. In the filament form,FDA Rubber Sheet, producing smooth-Food Grade Rubber Sheet.Red Silicone Rubber Sheet, filaments are cut to short,High Temperature Resistant Silicone Rubber Sheet.Transparent Silicone 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.High Temperature Resistant EPDM 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-Cloth Inserted EPDM Rubber Sheet,High Quality Aging Resistant EPDM Rubber Sheet, is extruded through a slot to form long ribbons.

Drying

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

SBR Rubber Sheet

Industrial Black SBR Rubber Sheet, 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,Vulcanized SBR Rubber Sheet. The rope-Abrasion Resistant Red SBR Rubber Sheet.

Drawing tow

• 1 Newly-Red SBR Rubber Sheet.Black SBR Rubber Sheet.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Hexagon Cow Stable Mat.Diamond Rubber Mat.

Cutting

• 4 Following heat setting,Rubber Powder Cow Stable Mat. 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)Hammer Groove Cow Stable Mat.Rubber Flooring, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Checker Rubber Floor Mat.

The Future

Rubber Floor Mat,Skirt Board Rubber's fastest-growing fiber.Skirt Board Rubber. 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,FDA Rubber Sheet, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,FDA Rubber. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.High Temperature Resistant Silicone Rubber Sheet, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.