Polyester

Background

Disc Washer, air, water, and petroleum. Developed in a 20th-century laboratory,Precision Washer. In this reaction,Gasket For Other Purposes.Other Washer.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Curved Spring Washer, computer and recording tapes, and electrical insulation.Spring Washer. It does not absorb moisture, but does absorb oil;Size Flat Pad-, soil-, and fire-Aluminum Oxide Color Washer. Its low absorbency also makes it naturally resistant to stains.Machining Anti Theft Nut,Butterfly Nut.Knurled Nut, and not damaged by mildew.Brass Nut, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Diamond Nut-based E.I. du Pont de Nemours and Co.Four Grip Nut. This early research, headed by W.H. Carothers,Other Nuts, 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,Long Hexagon Nut. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Slotted Hex Nut,Hexagon Full Hole Slotted Insert Nut. 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 Flange Nut with Anti Slip Teeth, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Hexagon Socket Nut.

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,Hexagon Nut. In this process, ethylene is the polymer, the chemical building block of polyester,Hand Tightening Screw.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Hand Screw. The four basic forms are filament,Quincunx Slotted Round Head Screw, tow, and fiberfill. In the filament form,Quincunx Slotted Cylindrical Head Screw, producing smooth-Hexagon Socket Knurled Cylindrical Head Screw.Hexagon Socket Countersunk Head Screw, filaments are cut to short,Hexagon Socket Machine Screw.Slotted Round Head Screw. 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.Slotting Machine Screw.

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-Screw,Long Bolt With Washer, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Multi Purpose 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.Anchor Bolt, which are usually round,Eyebolt. The number of holes in the spinneret determines the size of the yarn,Flower Basket 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,Handle Cam Rod 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,Other Bolts.
• Hexagon Bolt With Intermediate,Hexagon Head Bolt. Also,Round Head Bolt,T-shaped Countersunk Head Bolt.

Winding

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

Hexagon Socket Countersunk Head Bolt

Cross Countersunk Head Bolt, 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,Countersunk Head Bolt. The rope-Bolt.

Drawing tow

• 1 Newly-300ML Electric adhesive dispensing gun.Electric Adhesive Dispensing Gun.

Crimping

• 2 Drawn tow is then fed into compression boxes,Manual Adhesive Dispensing Gun, at a rate of 9-15 crimps per inch (3-6 per cm).250ML Pneumatic Adhesive Dispenser Application.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Pneumatic Adhesive Dispensing Gun.Manual Adhesive Dispenser.

Cutting

• 4 Following heat setting,Electric Adhesive Dispenser. 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)Pneumatic Adhesive Dispenser.HEPA Media Pads And Rolls Air Filtration For Pocket Type, such ascarpet,polyester filaments are cut into 6 inch (15 cm)HEPA Media Pads And Rolls Air Filtration For All Hepa Composite Base Fabric.

The Future

HEPA Media Pads And Rolls Air Filtration For All Medium,HEPA Media Pads And Rolls Air Filtration For All Primary's fastest-growing fiber.HEPA Media Pads And Rolls Air Filtration. 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,Air Filtration Media, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,HEPA Senior Effective Radicel Hepa Liquid Air Filter. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.HEPA Senior Effective Radicel Fine Air Filter V Bank With Cleanroom, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.