Polyester

Background

Machining Anti Theft Nut, air, water, and petroleum. Developed in a 20th-century laboratory,Butterfly Nut. In this reaction,Knurled Nut.Brass Nut.

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

History

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.Screw. The four basic forms are filament,Long Bolt With Washer, tow, and fiberfill. In the filament form,Multi Purpose Bolt, producing smooth-Anchor Bolt.Eyebolt, filaments are cut to short,Flower Basket Bolt.Handle Cam Rod 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.Other Bolts.

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-Hexagon Bolt With Intermediate,Hexagon Head Bolt, is extruded through a slot to form long ribbons.

Drying

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

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 Dispensing Gun

Manual 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,Electric Adhesive Dispenser. The rope-Pneumatic Adhesive Dispenser.

Drawing tow

• 1 Newly-HEPA Media Pads And Rolls Air Filtration For Pocket Type.HEPA Media Pads And Rolls Air Filtration For All Hepa Composite Base Fabric.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)HEPA Media Pads And Rolls Air Filtration.Air Filtration Media.

Cutting

• 4 Following heat setting,HEPA Senior Effective Radicel Hepa Liquid 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 Fine Air Filter V Bank With Cleanroom.HEPA Senior Effective Radicel Extend Surface Carbon V Style Air Filter, such ascarpet,polyester filaments are cut into 6 inch (15 cm)HEPA Senior Effective Radicel Box Air Filter With Clean Room.

The Future

HEPA Senior Effective Radicel Box Air Filter For Clapboard,Medium Effective Finepak Pocket Air Filter Media F5's fastest-growing fiber.Medium Effective Finepak Pocket Or Bag 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,Medium Effective Finepak Box Air Filter With Clapboard F7, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Primary Effective Prepak Effect Panel Air Filter. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Primary Effective Prepak Keel Bracket Air Filter, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.