Polyester

Background

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

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

History

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

The Manufacturing
Process

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

Drying

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

Handle Cam Rod Bolt

Other Bolts, 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 Bolt With Intermediate. The rope-Hexagon Head Bolt.

Drawing tow

• 1 Newly-Round Head Bolt.T-shaped Countersunk Head Bolt.

Crimping

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

Setting

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

Cutting

• 4 Following heat setting,300ML 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)Electric Adhesive Dispensing Gun.Manual Adhesive Dispensing Gun, such ascarpet,polyester filaments are cut into 6 inch (15 cm)250ML Pneumatic Adhesive Dispenser Application.

The Future

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