Polyester

Background

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

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

History

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

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,Aluminum rivets. In this process, ethylene is the polymer, the chemical building block of polyester,copper rivets.

The Manufacturing
Process

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

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-CuSn6 Phosphor Bronze Strip,C51900 Bronze Strip, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,C51000 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.CuSn5 Phosphor Bronze Strip, which are usually round,C5100 Bronze Strip. The number of holes in the spinneret determines the size of the yarn,C28000 Brass 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,H63 Brass Strip Coil. 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,C27000 CuZn35 Brass.
• H65 Brass Strip Coil,C26000 CuZn30 Brass Strip. Also,H80 Brass Strip Coil,C22000 CuZn10 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.

C22000 Brass Strip

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,C75200 Copper Nickel Zinc Strip. The rope-C7701 C7521 Nickel Silver Strip.

Drawing tow

• 1 Newly-Copper Nickel Zinc.Nickel Silver Strip.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Copper Clad.Silver Onlay Brass Strip.

Cutting

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

The Future

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