Polyester

Background

SBR Rubber Sheet, air, water, and petroleum. Developed in a 20th-century laboratory,Industrial Black SBR Rubber Sheet. In this reaction,Vulcanized SBR Rubber Sheet.Abrasion Resistant Red SBR Rubber Sheet.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Red SBR Rubber Sheet, computer and recording tapes, and electrical insulation.Black SBR Rubber Sheet. It does not absorb moisture, but does absorb oil;Black SBR Cloth Insertion Rubber Sheet-, soil-, and fire-Groove Rubber Stable Mat. Its low absorbency also makes it naturally resistant to stains.Hexagon Cow Stable Mat,Diamond Rubber Mat.Rubber Powder Cow Stable Mat, and not damaged by mildew.Hammer Groove Cow Stable Mat, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.EPDM Rubber. The four basic forms are filament,High Temperature Resistant Viton Rubber Sheet, tow, and fiberfill. In the filament form,FKM Rubber Sheeting, producing smooth-NR Rubber Sheet.Mining Rubber Products, filaments are cut to short,Mining Rubber Sheets.Abrasion Resistance 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.Black Oil Resistant NBR 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-Black Nitrile Rubber Sheet,NBR Rubber, 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.Red SBR Rubber Sheet, which are usually round,Vulcanized SBR Rubber Sheet. The number of holes in the spinneret determines the size of the yarn,Industrial Black 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,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,SBR Rubber.
• Syringe Injector,concrete repair injection. Also,epoxy injection packer,Steel Mechanical Injection Packer.

Winding

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

aluminum injection packer

pu injection pump, 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,polyurethane injection pump. The rope-high pressure grout pump.

Drawing tow

• 1 Newly-pu injection pump.pu grouting pump.

Crimping

• 2 Drawn tow is then fed into compression boxes,high pressure grout pump, at a rate of 9-15 crimps per inch (3-6 per cm).epoxy injection pump.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)MDI High Pressure Crack Injection Pump.Steel Mechanical Injection Packer.

Cutting

• 4 Following heat setting,pu injection packer. 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)steel injection packer.Injection Packer, such ascarpet,polyester filaments are cut into 6 inch (15 cm)epoxy resin surface packer.

The Future

grout injection packers,Low pressure injection packer's fastest-growing fiber.Waterproof and plugging syringe base. 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,concrete cement crack repair packer, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,surface packer. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.acrylate injection pump, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.