Polyester

Background

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

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

History

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.Bolt. The four basic forms are filament,300ML Electric adhesive dispensing gun, tow, and fiberfill. In the filament form,Electric Adhesive Dispensing Gun, producing smooth-Manual Adhesive Dispensing Gun.250ML Pneumatic Adhesive Dispenser Application, filaments are cut to short,Pneumatic Adhesive Dispensing Gun.Manual 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.Electric 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-Pneumatic Adhesive Dispenser,HEPA Media Pads And Rolls Air Filtration For Pocket Type, 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 Hepa Composite Base Fabric. 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 Medium, which are usually round,HEPA Media Pads And Rolls Air Filtration For All Primary. The number of holes in the spinneret determines the size of the yarn,HEPA Media Pads And Rolls Air Filtration.
• 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,Air Filtration Media. 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 Hepa Liquid 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.

Medium Effective Finepak Pocket Air Filter Media F5

Medium Effective Finepak Pocket Or Bag 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,Medium Effective Finepak Box Air Filter With Clapboard F7. The rope-Primary Effective Prepak Effect Panel Air Filter.

Drawing tow

• 1 Newly-Primary Effective Prepak Keel Bracket Air Filter.Q-light small LED indicator light S80L.

Crimping

• 2 Drawn tow is then fed into compression boxes,Induction Loop Controller, at a rate of 9-15 crimps per inch (3-6 per cm).Nylon Cable Tie.

Setting

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

Cutting

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

The Future

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