Polyester

Background

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

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

History

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

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,Abrasion Resistance Rubber Sheet. In this process, ethylene is the polymer, the chemical building block of polyester,Mining Rubber Sheets.

The Manufacturing
Process

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

Drying

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

Winding

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

Skirt Board Rubber

FDA 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,FDA Rubber. The rope-High Temperature Resistant Silicone Rubber Sheet.

Drawing tow

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

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)FKM Rubber Sheeting.NR Rubber Sheet.

Cutting

• 4 Following heat setting,Mining Rubber Products. 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)Mining Rubber Sheets.Abrasion Resistance Rubber Sheet, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Black Oil Resistant NBR Rubber Sheet.

The Future

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