Polyester

Background

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

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

History

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

The Manufacturing
Process

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

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

Drying

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

Electric Adhesive Dispensing Gun

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

Drawing tow

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

Crimping

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

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 Hepa Composite Base Fabric.HEPA Media Pads And Rolls Air Filtration For All Medium.

Cutting

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

The Future

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