Polyester

Background

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

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

History

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

The Manufacturing
Process

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

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-Electric Adhesive Dispenser,Pneumatic Adhesive Dispenser, 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 Pocket Type. 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 All Hepa Composite Base Fabric, which are usually round,HEPA Media Pads And Rolls Air Filtration For All Medium. The number of holes in the spinneret determines the size of the yarn,HEPA Media Pads And Rolls Air Filtration For All Primary.
• 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. 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,Air Filtration Media.
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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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Medium Effective Finepak Pocket Air Filter Media F5, 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 Or Bag Air Filter. The rope-Medium Effective Finepak Box Air Filter With Clapboard F7.

Drawing tow

• 1 Newly-Primary Effective Prepak Effect Panel Air Filter.Primary Effective Prepak Keel Bracket Air Filter.

Crimping

• 2 Drawn tow is then fed into compression boxes,Q-light small LED indicator light S80L, at a rate of 9-15 crimps per inch (3-6 per cm).Induction Loop Controller.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Nylon Cable Tie.Anti-UV PA66 Nylon Cable Tie.

Cutting

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

The Future

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