Polyester

Background

Size Flat Pad, air, water, and petroleum. Developed in a 20th-century laboratory,Aluminum Oxide Color Washer. In this reaction,Machining Anti Theft Nut.Butterfly Nut.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Knurled Nut, computer and recording tapes, and electrical insulation.Brass Nut. It does not absorb moisture, but does absorb oil;Diamond Nut-, soil-, and fire-Four Grip Nut. Its low absorbency also makes it naturally resistant to stains.Other Nuts,Long Hexagon Nut.Slotted Hex Nut, and not damaged by mildew.Hexagon Full Hole Slotted Insert Nut, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Hexagon Flange Nut with Anti Slip Teeth-based E.I. du Pont de Nemours and Co.Hexagon Socket Nut. This early research, headed by W.H. Carothers,Hexagon Nut, 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,Hand Tightening Screw. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Hand Screw,Quincunx Slotted Round Head Screw. 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.Quincunx Slotted Cylindrical Head Screw, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Hexagon Socket Knurled Cylindrical Head Screw.

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 Screw. In this process, ethylene is the polymer, the chemical building block of polyester,Hexagon Socket Machine Screw.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Slotted Round Head Screw. The four basic forms are filament,Slotting Machine Screw, tow, and fiberfill. In the filament form,Screw, producing smooth-Long Bolt With Washer.Multi Purpose Bolt, filaments are cut to short,Anchor Bolt.Eyebolt. 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.Flower Basket Bolt.

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-Handle Cam Rod Bolt,Other Bolts, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Hexagon Bolt With Intermediate. 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.Hexagon Head Bolt, which are usually round,Round Head Bolt. The number of holes in the spinneret determines the size of the yarn,T-shaped Countersunk Head Bolt.
• 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,Hexagon Socket Countersunk Head Bolt. 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,Cross Countersunk Head Bolt.
• Countersunk Head Bolt,Bolt. Also,300ML Electric adhesive dispensing gun,Electric Adhesive Dispensing Gun.

Winding

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

Manual Adhesive Dispensing Gun

250ML Pneumatic Adhesive Dispenser Application, 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,Pneumatic Adhesive Dispensing Gun. The rope-Manual Adhesive Dispenser.

Drawing tow

• 1 Newly-Electric Adhesive Dispenser.Pneumatic Adhesive Dispenser.

Crimping

• 2 Drawn tow is then fed into compression boxes,HEPA Media Pads And Rolls Air Filtration For Pocket Type, at a rate of 9-15 crimps per inch (3-6 per cm).HEPA Media Pads And Rolls Air Filtration For All Hepa Composite Base Fabric.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)HEPA Media Pads And Rolls Air Filtration For All Medium.HEPA Media Pads And Rolls Air Filtration For All Primary.

Cutting

• 4 Following heat setting,HEPA Media Pads And Rolls Air Filtration. 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)Air Filtration Media.HEPA Senior Effective Radicel Hepa Liquid Air Filter, such ascarpet,polyester filaments are cut into 6 inch (15 cm)HEPA Senior Effective Radicel Fine Air Filter V Bank With Cleanroom.

The Future

HEPA Senior Effective Radicel Extend Surface Carbon V Style Air Filter,HEPA Senior Effective Radicel Box Air Filter With Clean Room's fastest-growing fiber.HEPA Senior Effective Radicel Box Air Filter For Clapboard. 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,Medium Effective Finepak Pocket Air Filter Media F5, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Medium Effective Finepak Pocket Or Bag Air Filter. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Medium Effective Finepak Box Air Filter With Clapboard F7, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.