Polyester

Background

Hexagon Socket Knurled Cylindrical Head Screw, air, water, and petroleum. Developed in a 20th-century laboratory,Hexagon Socket Countersunk Head Screw. In this reaction,Hexagon Socket Machine Screw.Slotted Round Head Screw.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Slotting Machine Screw, computer and recording tapes, and electrical insulation.Screw. It does not absorb moisture, but does absorb oil;Long Bolt With Washer-, soil-, and fire-Multi Purpose Bolt. Its low absorbency also makes it naturally resistant to stains.Anchor Bolt,Eyebolt.Flower Basket Bolt, and not damaged by mildew.Handle Cam Rod Bolt, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Other Bolts-based E.I. du Pont de Nemours and Co.Hexagon Bolt With Intermediate. This early research, headed by W.H. Carothers,Hexagon Head Bolt, 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,Round Head Bolt. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.T-shaped Countersunk Head Bolt,Hexagon Socket Countersunk Head Bolt. 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.Cross Countersunk Head Bolt, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Countersunk Head Bolt.

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,Bolt. In this process, ethylene is the polymer, the chemical building block of polyester,300ML Electric adhesive dispensing gun.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Electric Adhesive Dispensing Gun. The four basic forms are filament,Manual Adhesive Dispensing Gun, tow, and fiberfill. In the filament form,250ML Pneumatic Adhesive Dispenser Application, producing smooth-Pneumatic Adhesive Dispensing Gun.Manual Adhesive Dispenser, filaments are cut to short,Electric Adhesive Dispenser.Pneumatic Adhesive Dispenser. 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.HEPA Media Pads And Rolls Air Filtration For Pocket Type.

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-HEPA Media Pads And Rolls Air Filtration For All Hepa Composite Base Fabric,HEPA Media Pads And Rolls Air Filtration For All Medium, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,HEPA Media Pads And Rolls Air Filtration For All Primary. 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.HEPA Media Pads And Rolls Air Filtration, which are usually round,Air Filtration Media. The number of holes in the spinneret determines the size of the yarn,HEPA Senior Effective Radicel Hepa Liquid Air Filter.
• 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,HEPA Senior Effective Radicel Fine Air Filter V Bank With Cleanroom. 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,HEPA Senior Effective Radicel Extend Surface Carbon V Style Air Filter.
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Winding

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

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Primary Effective Prepak Effect Panel Air Filter, 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,Primary Effective Prepak Keel Bracket Air Filter. The rope-Q-light small LED indicator light S80L.

Drawing tow

• 1 Newly-Induction Loop Controller.Nylon Cable Tie.

Crimping

• 2 Drawn tow is then fed into compression boxes,Anti-UV PA66 Nylon Cable Tie, at a rate of 9-15 crimps per inch (3-6 per cm).New Product Nylon Cable Ties with good price.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Vehicle Restraint with good price.Vehicle Restraint.

Cutting

• 4 Following heat setting,Vehicle Restraint. 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)Dock Seal.Inflatable Dock Shelter, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Adjustable Dock Seal.

The Future

Dock leveler bumper,Sponge Dock Seal's fastest-growing fiber.Dock Shelter. 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,Dock Seal And Shelter, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Telescopic Hydraulic Dock Leveler. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Baffle Hydraulic Dock Leveler, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.