Polyester

Background

Cooling System, air, water, and petroleum. Developed in a 20th-century laboratory,Aluminum Welded Tube. In this reaction,Radiator aluminum flat tube.Aluminum intercooler rectangular tube.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Composite condenser Tube, computer and recording tapes, and electrical insulation.Heat Sink Aluminum Oil Cooler Tube. It does not absorb moisture, but does absorb oil;Aluminium Multi channel Tube-, soil-, and fire-Extruded Radiator Tubes. Its low absorbency also makes it naturally resistant to stains.High frequency welded condenser tube,Aluminium Micro channel Tube.High Frequency Oil Cooler Tube, and not damaged by mildew.Checker Rubber Floor Mat, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.High Quality Aging Resistant EPDM Rubber Sheet. The four basic forms are filament,FKM Rubber Sheet, tow, and fiberfill. In the filament form,High Temperature Resistant Viton Rubber Sheet, producing smooth-Ozone Resistant Viton Rubber Sheet.Abrasion Resistance Sheet Rubber, filaments are cut to short,Abrasion Resistance Rubber Sheet.Mining Rubber Sheets. 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.Mining Rubber Products.

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-Nitrile Rubber Sheet Supplier,NBR Rubber Sheet, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Black Oil Resistant NBR 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.SBR Rubber Sheet, which are usually round,Industrial Black SBR Rubber Sheet. The number of holes in the spinneret determines the size of the yarn,Vulcanized SBR Rubber Sheet.
• 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 Resistant Red SBR 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,Red SBR Rubber Sheet.
• Black SBR Rubber Sheet,Black SBR Cloth Insertion Rubber Sheet. Also,Groove Rubber Stable Mat,Hexagon Cow Stable 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.

Diamond Rubber Mat

Rubber Powder Cow Stable Mat, 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,Hammer Groove Cow Stable Mat. The rope-Rubber Flooring.

Drawing tow

• 1 Newly-Checker Rubber Floor Mat.Rubber Floor Mat.

Crimping

• 2 Drawn tow is then fed into compression boxes,Skirt Board Rubber, at a rate of 9-15 crimps per inch (3-6 per cm).Skirt Board Rubber.

Setting

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

Cutting

• 4 Following heat setting,High Temperature Resistant Silicone Rubber Sheet. 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)Silicone Rubber.High Temperature Resistant EPDM Rubber Sheet, such ascarpet,polyester filaments are cut into 6 inch (15 cm)EPDM Rubber.

The Future

High Temperature Resistant Viton Rubber Sheet,FKM Rubber Sheeting's fastest-growing fiber.NR 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,Mining Rubber Products, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Mining Rubber Sheets. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Abrasion Resistance 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.