Polyester

Background

FDA Approved Food Grade PVC Steel Wire Hose, air, water, and petroleum. Developed in a 20th-century laboratory,Clear PVC Fiber Reinforced Hose. In this reaction,High Pressure PVC Lay Flat Hose.Blue PVC Layflat Hose.

Polyester is used in the manufacture of many products, including clothing, home furnishings,PVC Lay Flat Water Delivery Hose, computer and recording tapes, and electrical insulation.Pool Backwash PVC Layflat Hose. It does not absorb moisture, but does absorb oil;PVC Lay Flat Discharge Hose-, soil-, and fire-Sunny Layflat Hose. Its low absorbency also makes it naturally resistant to stains.C19400,nickel silver alloy.silver points, and not damaged by mildew.Steel rivets, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Aluminum rivets-based E.I. du Pont de Nemours and Co.copper rivets. This early research, headed by W.H. Carothers,AgCdO Bimetal rivet, 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,AgCdO contact. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.CNC Parts,CuBe2 Beryllium Copper Strip. 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.CuBe2 Beryllium Copper, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.C17200 Beryllium Copper Strip.

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,C17200 Beryllium Copper. In this process, ethylene is the polymer, the chemical building block of polyester,Beryllium Copper.

The Manufacturing
Process

Polyester is manufactured by one of several methods.CuSn6 Phosphor Bronze Strip. The four basic forms are filament,C51900 Bronze Strip, tow, and fiberfill. In the filament form,C51000 Bronze Strip, producing smooth-CuSn5 Phosphor Bronze Strip.C5100 Bronze Strip, filaments are cut to short,C28000 Brass Strip.H63 Brass Strip Coil. 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.C27000 CuZn35 Brass.

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-H65 Brass Strip Coil,C26000 CuZn30 Brass Strip, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,H80 Brass Strip Coil. 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.C22000 CuZn10 Brass Strip, which are usually round,C22000 Brass Strip. The number of holes in the spinneret determines the size of the yarn,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,C75200 Copper Nickel Zinc 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,C7701 C7521 Nickel Silver Strip.
• Copper Nickel Zinc,Nickel Silver Strip. Also,Nickel Plated Copper Strip,PCB Copper.

Winding

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

Copper Clad

Silver Onlay 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,Silver Onlay. The rope-Silver Clad Copper Strip.

Drawing tow

• 1 Newly-Silver Clad.Semi Tubular Brass Rivet.

Crimping

• 2 Drawn tow is then fed into compression boxes,Brass Tubular Rivet, at a rate of 9-15 crimps per inch (3-6 per cm).Solid Brass Rivet.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Solid Copper Rivets.Copper Rivet.

Cutting

• 4 Following heat setting,Silver Contact Points. 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)Electrical Contact Rivets.Silver Tungsten Electrical Contact, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Moving Contact Rivets.

The Future

Cervical Secretion IGFBP-1 PROM Test Strip,Cervical Secretion IGFBP-1 PROM Test's fastest-growing fiber.IGFBP-1 PROM Test. 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,Urine FSH Menopause Test Device, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,LH Ovulation Test. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Serum HCG Pregnancy Test, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.