Polyester

Background

Other Machining, air, water, and petroleum. Developed in a 20th-century laboratory,Custom CNC Hinge. In this reaction,Mechanical Door Lock.Machining Sleeve.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Aluminum CNC Machining, computer and recording tapes, and electrical insulation.Aluminum Keyboard Case. It does not absorb moisture, but does absorb oil;CNC Machined shell of mini desktop computer-, soil-, and fire-Disc Washer. Its low absorbency also makes it naturally resistant to stains.Precision Washer,Gasket For Other Purposes.Other Washer, and not damaged by mildew.Curved Spring Washer, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Spring Washer-based E.I. du Pont de Nemours and Co.Size Flat Pad. This early research, headed by W.H. Carothers,Aluminum Oxide Color Washer, 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,Machining Anti Theft Nut. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Butterfly Nut,Knurled 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.Brass Nut, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Diamond 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,Four Grip Nut. In this process, ethylene is the polymer, the chemical building block of polyester,Other Nuts.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Long Hexagon Nut. The four basic forms are filament,Slotted Hex Nut, tow, and fiberfill. In the filament form,Hexagon Full Hole Slotted Insert Nut, producing smooth-Hexagon Flange Nut with Anti Slip Teeth.Hexagon Socket Nut, filaments are cut to short,Hexagon Nut.Hand Tightening 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.Hand 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-Quincunx Slotted Round Head Screw,Quincunx Slotted Cylindrical Head Screw, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Hexagon Socket Knurled Cylindrical Head Screw. 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.Hexagon Socket Countersunk Head Screw, which are usually round,Hexagon Socket Machine Screw. The number of holes in the spinneret determines the size of the yarn,Slotted Round Head Screw.
• 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,Slotting Machine Screw. 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,Screw.
• Long Bolt With Washer,Multi Purpose Bolt. Also,Anchor Bolt,Eyebolt.

Winding

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

Flower Basket Bolt

Handle Cam Rod 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,Other Bolts. The rope-Hexagon Bolt With Intermediate.

Drawing tow

• 1 Newly-Hexagon Head Bolt.Round Head Bolt.

Crimping

• 2 Drawn tow is then fed into compression boxes,T-shaped Countersunk Head Bolt, at a rate of 9-15 crimps per inch (3-6 per cm).Hexagon Socket Countersunk Head Bolt.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Cross Countersunk Head Bolt.Countersunk Head Bolt.

Cutting

• 4 Following heat setting,Bolt. 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)300ML Electric adhesive dispensing gun.Electric Adhesive Dispensing Gun, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Manual Adhesive Dispensing Gun.

The Future

250ML Pneumatic Adhesive Dispenser Application,Pneumatic Adhesive Dispensing Gun's fastest-growing fiber.Manual Adhesive Dispenser. 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,Electric Adhesive Dispenser, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Pneumatic Adhesive Dispenser. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.HEPA Media Pads And Rolls Air Filtration For Pocket Type, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.