Polyester

Background

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

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

History

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

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,Multi Purpose Bolt. In this process, ethylene is the polymer, the chemical building block of polyester,Anchor Bolt.

The Manufacturing
Process

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

Drying

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

HEPA Media Pads And Rolls Air Filtration For Pocket Type

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

Drawing tow

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

Crimping

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

Setting

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

Cutting

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

The Future

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