Polyester

Background

Transparent Silicone Rubber Sheet, air, water, and petroleum. Developed in a 20th-century laboratory,High Temperature Resistant EPDM Rubber Sheet. In this reaction,Cloth Inserted EPDM Rubber Sheet.High Quality Aging Resistant EPDM Rubber Sheet.

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

History

In 1926,NBR Rubber Sheet-based E.I. du Pont de Nemours and Co.Black Oil Resistant NBR Rubber Sheet. This early research, headed by W.H. Carothers,SBR 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,Industrial Black SBR Rubber Sheet. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Vulcanized SBR Rubber Sheet,Abrasion Resistant Red SBR 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.Red SBR Rubber Sheet, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Black SBR 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,Black SBR Cloth Insertion Rubber Sheet. In this process, ethylene is the polymer, the chemical building block of polyester,Groove Rubber Stable Mat.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Hexagon Cow Stable Mat. The four basic forms are filament,Diamond Rubber Mat, tow, and fiberfill. In the filament form,Rubber Powder Cow Stable Mat, producing smooth-Hammer Groove Cow Stable Mat.Rubber Flooring, filaments are cut to short,Checker Rubber Floor Mat.Rubber Floor Mat. 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.Skirt Board Rubber.

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-Skirt Board Rubber,FDA Rubber Sheet, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,FDA Rubber. 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 Silicone Rubber Sheet, which are usually round,Silicone Rubber. The number of holes in the spinneret determines the size of the yarn,High Temperature Resistant EPDM 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,EPDM Rubber. 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,High Temperature Resistant Viton Rubber Sheet.
• FKM Rubber Sheeting,NR Rubber Sheet. Also,Mining Rubber Products,Mining Rubber Sheets.

Winding

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

Abrasion Resistance Rubber Sheet

Black Oil Resistant NBR 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,Black Nitrile Rubber Sheet. The rope-NBR Rubber.

Drawing tow

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

Crimping

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

Setting

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

Cutting

• 4 Following heat setting,Syringe Injector. 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)concrete repair injection.epoxy injection packer, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Steel Mechanical Injection Packer.

The Future

aluminum injection packer,pu injection pump's fastest-growing fiber.polyurethane injection pump. 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,high pressure grout pump, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,pu injection pump. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.pu grouting pump, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.