Polyester

Background

Heat Sink Aluminum Oil Cooler Tube, air, water, and petroleum. Developed in a 20th-century laboratory,Aluminium Multi channel Tube. In this reaction,Extruded Radiator Tubes.High frequency welded condenser tube.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Aluminium Micro channel Tube, computer and recording tapes, and electrical insulation.High Frequency Oil Cooler Tube. It does not absorb moisture, but does absorb oil;Checker Rubber Floor Mat-, soil-, and fire-Rubber Mat. Its low absorbency also makes it naturally resistant to stains.Black Butyl Rubber Sheet,Skirt Board Rubber.FDA Rubber Sheet, and not damaged by mildew.Food Grade Rubber Sheet, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Red Silicone Rubber Sheet-based E.I. du Pont de Nemours and Co.High Temperature Resistant Silicone Rubber Sheet. This early research, headed by W.H. Carothers,Transparent Silicone 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,High Temperature Resistant EPDM Rubber Sheet. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Cloth Inserted EPDM Rubber Sheet,High Quality Aging Resistant EPDM 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.FKM Rubber Sheet, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.High Temperature Resistant Viton 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,Ozone Resistant Viton Rubber Sheet. In this process, ethylene is the polymer, the chemical building block of polyester,Abrasion Resistance Sheet Rubber.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Abrasion Resistance Rubber Sheet. The four basic forms are filament,Mining Rubber Sheets, tow, and fiberfill. In the filament form,Mining Rubber Products, producing smooth-Nitrile Rubber Sheet Supplier.NBR Rubber Sheet, filaments are cut to short,Black Oil Resistant NBR Rubber Sheet.SBR 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.Industrial Black SBR 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-Vulcanized SBR Rubber Sheet,Abrasion Resistant Red SBR Rubber Sheet, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Red SBR 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 SBR Rubber Sheet, which are usually round,Black SBR Cloth Insertion Rubber Sheet. The number of holes in the spinneret determines the size of the yarn,Groove Rubber Stable Mat.
• 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,Hexagon Cow Stable Mat. 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,Diamond Rubber Mat.
• Rubber Powder Cow Stable Mat,Hammer Groove Cow Stable Mat. Also,Rubber Flooring,Checker Rubber Floor Mat.

Winding

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

Rubber Floor Mat

Skirt Board Rubber, 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,Skirt Board Rubber. The rope-FDA Rubber Sheet.

Drawing tow

• 1 Newly-FDA Rubber.High Temperature Resistant Silicone Rubber Sheet.

Crimping

• 2 Drawn tow is then fed into compression boxes,Silicone Rubber, at a rate of 9-15 crimps per inch (3-6 per cm).High Temperature Resistant EPDM Rubber Sheet.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)EPDM Rubber.High Temperature Resistant Viton Rubber Sheet.

Cutting

• 4 Following heat setting,FKM Rubber Sheeting. 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)NR Rubber Sheet.Mining Rubber Products, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Mining Rubber Sheets.

The Future

Abrasion Resistance Rubber Sheet,Black Oil Resistant NBR Rubber Sheet's fastest-growing fiber.Black Nitrile Rubber Sheet. 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,NBR Rubber, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Black SBR Cloth Insertion Rubber Sheet. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Red SBR 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.