Polyester

Background

Grey PVC Suction Hose, air, water, and petroleum. Developed in a 20th-century laboratory,Green PVC Suction Hose. In this reaction,Clear Orange Braid PVC Water Suction Discharge Transfer Hose.Heavy Duty Fabric Reinforced PVC Suction and Discharge Hose.

Polyester is used in the manufacture of many products, including clothing, home furnishings,PVC Suction Hose, computer and recording tapes, and electrical insulation.General Purpose PVC Garden Hose. It does not absorb moisture, but does absorb oil;Reinforced Braided PVC Hose-, soil-, and fire-PVC Thunder Hose Pipe. Its low absorbency also makes it naturally resistant to stains.PVC Spring Hose,Non Toxic PVC Steel Wire Hose.FDA Approved Food Grade PVC Steel Wire Hose, and not damaged by mildew.Clear PVC Fiber Reinforced Hose, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,High Pressure PVC Lay Flat Hose-based E.I. du Pont de Nemours and Co.Blue PVC Layflat Hose. This early research, headed by W.H. Carothers,PVC Lay Flat Water Delivery Hose, 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,Pool Backwash PVC Layflat Hose. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.PVC Lay Flat Discharge Hose,Sunny Layflat Hose. 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.C19400, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.nickel silver alloy.

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,silver points. In this process, ethylene is the polymer, the chemical building block of polyester,Steel rivets.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Aluminum rivets. The four basic forms are filament,copper rivets, tow, and fiberfill. In the filament form,AgCdO Bimetal rivet, producing smooth-AgCdO contact.CNC Parts, filaments are cut to short,CuBe2 Beryllium Copper Strip.CuBe2 Beryllium Copper. 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.C17200 Beryllium Copper Strip.

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-C17200 Beryllium Copper,Beryllium Copper, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,CuSn6 Phosphor Bronze Strip. 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.C51900 Bronze Strip, which are usually round,C51000 Bronze Strip. The number of holes in the spinneret determines the size of the yarn,CuSn5 Phosphor Bronze Strip.
• 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,C5100 Bronze Strip. 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,C28000 Brass Strip.
• H63 Brass Strip Coil,C27000 CuZn35 Brass. Also,H65 Brass Strip Coil,C26000 CuZn30 Brass Strip.

Winding

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

H80 Brass Strip Coil

C22000 CuZn10 Brass Strip, 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,C22000 Brass Strip. The rope-Brass Strip.

Drawing tow

• 1 Newly-C75200 Copper Nickel Zinc Strip.C7701 C7521 Nickel Silver Strip.

Crimping

• 2 Drawn tow is then fed into compression boxes,Copper Nickel Zinc, at a rate of 9-15 crimps per inch (3-6 per cm).Nickel Silver Strip.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Nickel Plated Copper Strip.PCB Copper.

Cutting

• 4 Following heat setting,Copper Clad. 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)Silver Onlay Brass Strip.Silver Onlay, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Silver Clad Copper Strip.

The Future

Silver Clad,Semi Tubular Brass Rivet's fastest-growing fiber.Brass Tubular Rivet. 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,Solid Brass Rivet, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Solid Copper Rivets. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Copper Rivet, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.