Polyester

Background

Hand Tightening Screw, air, water, and petroleum. Developed in a 20th-century laboratory,Hand Screw. In this reaction,Quincunx Slotted Round Head Screw.Quincunx Slotted Cylindrical Head Screw.

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

History

In 1926,Anchor Bolt-based E.I. du Pont de Nemours and Co.Eyebolt. This early research, headed by W.H. Carothers,Flower Basket 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,Handle Cam Rod Bolt. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Other Bolts,Hexagon Bolt With Intermediate. 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.Hexagon Head Bolt, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Round 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,T-shaped Countersunk Head Bolt. In this process, ethylene is the polymer, the chemical building block of polyester,Hexagon Socket Countersunk Head Bolt.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Cross Countersunk Head Bolt. The four basic forms are filament,Countersunk Head Bolt, tow, and fiberfill. In the filament form,Bolt, producing smooth-300ML Electric adhesive dispensing gun.Electric Adhesive Dispensing Gun, filaments are cut to short,Manual Adhesive Dispensing Gun.250ML Pneumatic Adhesive Dispenser Application. 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.Pneumatic Adhesive Dispensing Gun.

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-Manual Adhesive Dispenser,Electric Adhesive Dispenser, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Pneumatic Adhesive Dispenser. 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 For Pocket Type, which are usually round,HEPA Media Pads And Rolls Air Filtration For All Hepa Composite Base Fabric. The number of holes in the spinneret determines the size of the yarn,HEPA Media Pads And Rolls Air Filtration For All Medium.
• 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 Media Pads And Rolls Air Filtration For All Primary. 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 Media Pads And Rolls Air Filtration.
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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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HEPA Senior Effective Radicel Box Air Filter For Clapboard, 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,Medium Effective Finepak Pocket Air Filter Media F5. The rope-Medium Effective Finepak Pocket Or Bag Air Filter.

Drawing tow

• 1 Newly-Medium Effective Finepak Box Air Filter With Clapboard F7.Primary Effective Prepak Effect Panel Air Filter.

Crimping

• 2 Drawn tow is then fed into compression boxes,Primary Effective Prepak Keel Bracket Air Filter, at a rate of 9-15 crimps per inch (3-6 per cm).Q-light small LED indicator light S80L.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Induction Loop Controller.Nylon Cable Tie.

Cutting

• 4 Following heat setting,Anti-UV PA66 Nylon Cable Tie. 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)New Product Nylon Cable Ties with good price.Vehicle Restraint with good price, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Vehicle Restraint.

The Future

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