Polyester

Background

Long Hexagon Nut, air, water, and petroleum. Developed in a 20th-century laboratory,Slotted Hex Nut. In this reaction,Hexagon Full Hole Slotted Insert Nut.Hexagon Flange Nut with Anti Slip Teeth.

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

History

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

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,Flower Basket Bolt. In this process, ethylene is the polymer, the chemical building block of polyester,Handle Cam Rod Bolt.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Other Bolts. The four basic forms are filament,Hexagon Bolt With Intermediate, tow, and fiberfill. In the filament form,Hexagon Head Bolt, producing smooth-Round Head Bolt.T-shaped Countersunk Head Bolt, filaments are cut to short,Hexagon Socket Countersunk Head Bolt.Cross 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.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-Bolt,300ML Electric adhesive dispensing gun, is extruded through a slot to form long ribbons.

Drying

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

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 Primary

HEPA Media Pads And Rolls Air Filtration, 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,Air Filtration Media. The rope-HEPA Senior Effective Radicel Hepa Liquid Air Filter.

Drawing tow

• 1 Newly-HEPA Senior Effective Radicel Fine Air Filter V Bank With Cleanroom.HEPA Senior Effective Radicel Extend Surface Carbon V Style Air Filter.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Medium Effective Finepak Pocket Air Filter Media F5.Medium Effective Finepak Pocket Or Bag Air Filter.

Cutting

• 4 Following heat setting,Medium Effective Finepak Box Air Filter With Clapboard F7. 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)Primary Effective Prepak Effect Panel Air Filter.Primary Effective Prepak Keel Bracket Air Filter, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Q-light small LED indicator light S80L.

The Future

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