Polyester

Background

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

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

History

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

The Manufacturing
Process

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

Drying

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

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 Hepa Composite Base Fabric

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

Drawing tow

• 1 Newly-Air Filtration Media.HEPA Senior Effective Radicel Hepa Liquid Air Filter.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)HEPA Senior Effective Radicel Box Air Filter With Clean Room.HEPA Senior Effective Radicel Box Air Filter For Clapboard.

Cutting

• 4 Following heat setting,Medium Effective Finepak Pocket Air Filter Media F5. 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 Pocket Or Bag Air Filter.Medium Effective Finepak Box Air Filter With Clapboard F7, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Primary Effective Prepak Effect Panel Air Filter.

The Future

Primary Effective Prepak Keel Bracket Air Filter,Q-light small LED indicator light S80L's fastest-growing fiber.Induction Loop Controller. 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,Nylon Cable Tie, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Anti-UV PA66 Nylon Cable Tie. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.New Product Nylon Cable Ties 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.