Polyester

Background

Aluminum CNC Machining, air, water, and petroleum. Developed in a 20th-century laboratory,Aluminum Keyboard Case. In this reaction,CNC Machined shell of mini desktop computer.Disc Washer.

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

History

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

The Manufacturing
Process

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

Drying

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

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 Head Bolt

Round 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,T-shaped Countersunk Head Bolt. The rope-Hexagon Socket Countersunk Head Bolt.

Drawing tow

• 1 Newly-Cross Countersunk Head Bolt.Countersunk Head Bolt.

Crimping

• 2 Drawn tow is then fed into compression boxes,Bolt, at a rate of 9-15 crimps per inch (3-6 per cm).300ML Electric adhesive dispensing gun.

Setting

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

Cutting

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

The Future

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