Polyester

Background

Other Nuts, air, water, and petroleum. Developed in a 20th-century laboratory,Long Hexagon Nut. In this reaction,Slotted Hex Nut.Hexagon Full Hole Slotted Insert Nut.

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

History

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

The Manufacturing
Process

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

Drying

• 3 After the polyester emerges from polymerization,300ML Electric adhesive dispensing gun. 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.Electric Adhesive Dispensing Gun, which are usually round,Manual Adhesive Dispensing Gun. The number of holes in the spinneret determines the size of the yarn,250ML Pneumatic Adhesive Dispenser Application.
• 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,Pneumatic 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 Dispenser.
• Electric Adhesive Dispenser,Pneumatic Adhesive Dispenser. Also,HEPA Media Pads And Rolls Air Filtration For Pocket Type,HEPA Media Pads And Rolls Air Filtration For All Hepa Composite Base Fabric.

Winding

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

HEPA Media Pads And Rolls Air Filtration For All Medium

HEPA Media Pads And Rolls Air Filtration For All Primary, 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. The rope-Air Filtration Media.

Drawing tow

• 1 Newly-HEPA Senior Effective Radicel Hepa Liquid Air Filter.HEPA Senior Effective Radicel Fine Air Filter V Bank With Cleanroom.

Crimping

• 2 Drawn tow is then fed into compression boxes,HEPA Senior Effective Radicel Extend Surface Carbon V Style Air Filter, at a rate of 9-15 crimps per inch (3-6 per cm).HEPA Senior Effective Radicel Box Air Filter With Clean Room.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)HEPA Senior Effective Radicel Box Air Filter For Clapboard.Medium Effective Finepak Pocket Air Filter Media F5.

Cutting

• 4 Following heat setting,Medium Effective Finepak Pocket Or Bag 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)Medium Effective Finepak Box Air Filter With Clapboard F7.Primary Effective Prepak Effect Panel Air Filter, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Primary Effective Prepak Keel Bracket Air Filter.

The Future

Q-light small LED indicator light S80L,Induction Loop Controller's fastest-growing fiber.Nylon Cable Tie. 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,Anti-UV PA66 Nylon Cable Tie, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,New Product Nylon Cable Ties with good price. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Vehicle Restraint with good price, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.