Polyester

Background

Mechanical Door Lock, air, water, and petroleum. Developed in a 20th-century laboratory,Machining Sleeve. In this reaction,Aluminum CNC Machining.Aluminum Keyboard Case.

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

History

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

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,Long Hexagon Nut. In this process, ethylene is the polymer, the chemical building block of polyester,Slotted Hex Nut.

The Manufacturing
Process

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

Drying

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

Other Bolts

Hexagon Bolt With Intermediate, 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,Hexagon Head Bolt. The rope-Round Head Bolt.

Drawing tow

• 1 Newly-T-shaped Countersunk Head Bolt.Hexagon Socket Countersunk Head Bolt.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Bolt.300ML Electric adhesive dispensing gun.

Cutting

• 4 Following heat setting,Electric Adhesive Dispensing Gun. 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)Manual Adhesive Dispensing Gun.250ML Pneumatic Adhesive Dispenser Application, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Pneumatic Adhesive Dispensing Gun.

The Future

Manual Adhesive Dispenser,Electric Adhesive Dispenser's fastest-growing fiber.Pneumatic 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,HEPA Media Pads And Rolls Air Filtration For Pocket Type, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,HEPA Media Pads And Rolls Air Filtration For All Hepa Composite Base Fabric. 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 All Medium, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.