Polyester

Background

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

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

History

In 1926,Quincunx Slotted Round Head Screw-based E.I. du Pont de Nemours and Co.Quincunx Slotted Cylindrical Head Screw. This early research, headed by W.H. Carothers,Hexagon Socket Knurled 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 Countersunk Head Screw. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Hexagon Socket Machine Screw,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.Slotting Machine Screw, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.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,Long Bolt With Washer. In this process, ethylene is the polymer, the chemical building block of polyester,Multi Purpose Bolt.

The Manufacturing
Process

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

Drying

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

Pneumatic Adhesive Dispenser

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

Drawing tow

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

Crimping

• 2 Drawn tow is then fed into compression boxes,Air Filtration Media, at a rate of 9-15 crimps per inch (3-6 per cm).HEPA Senior Effective Radicel Hepa Liquid Air Filter.

Setting

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

Cutting

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

The Future

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