Polyester

Background

Knurled Nut, air, water, and petroleum. Developed in a 20th-century laboratory,Brass Nut. In this reaction,Diamond Nut.Four Grip Nut.

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

History

In 1926,Hand Screw-based E.I. du Pont de Nemours and Co.Quincunx Slotted Round Head Screw. This early research, headed by W.H. Carothers,Quincunx Slotted Cylindrical Head Screw, 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 Socket Knurled Cylindrical Head Screw. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Hexagon Socket Countersunk Head Screw,Hexagon Socket Machine 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.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.Slotting Machine 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,Screw. In this process, ethylene is the polymer, the chemical building block of polyester,Long Bolt With Washer.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Multi Purpose Bolt. The four basic forms are filament,Anchor Bolt, tow, and fiberfill. In the filament form,Eyebolt, producing smooth-Flower Basket Bolt.Handle Cam Rod Bolt, filaments are cut to short,Other Bolts.Hexagon Bolt With Intermediate. 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.Hexagon Head 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-Round Head Bolt,T-shaped Countersunk Head Bolt, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Hexagon Socket Countersunk Head Bolt. 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.Cross Countersunk Head Bolt, which are usually round,Countersunk Head Bolt. The number of holes in the spinneret determines the size of the yarn,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,300ML Electric adhesive dispensing gun. 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,Electric Adhesive Dispensing Gun.
• Manual Adhesive Dispensing Gun,250ML Pneumatic Adhesive Dispenser Application. Also,Pneumatic Adhesive Dispensing Gun,Manual Adhesive Dispenser.

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 Dispenser

Pneumatic Adhesive Dispenser, 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,HEPA Media Pads And Rolls Air Filtration For Pocket Type. The rope-HEPA Media Pads And Rolls Air Filtration For All Hepa Composite Base Fabric.

Drawing tow

• 1 Newly-HEPA Media Pads And Rolls Air Filtration For All Medium.HEPA Media Pads And Rolls Air Filtration For All Primary.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)HEPA Senior Effective Radicel Hepa Liquid Air Filter.HEPA Senior Effective Radicel Fine Air Filter V Bank With Cleanroom.

Cutting

• 4 Following heat setting,HEPA Senior Effective Radicel Extend Surface Carbon V Style Air Filter. 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 Senior Effective Radicel Box Air Filter With Clean Room.HEPA Senior Effective Radicel Box Air Filter For Clapboard, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Medium Effective Finepak Pocket Air Filter Media F5.

The Future

Medium Effective Finepak Pocket Or Bag Air Filter,Medium Effective Finepak Box Air Filter With Clapboard F7's fastest-growing fiber.Primary Effective Prepak Effect Panel Air Filter. 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,Primary Effective Prepak Keel Bracket Air Filter, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Q-light small LED indicator light S80L. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Induction Loop Controller, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.