Polyester

Background

Disposable Non Woven Three Layer Ear Hanging Mask, air, water, and petroleum. Developed in a 20th-century laboratory,Disposable Non-medical Masks. In this reaction,metal cnc machining.Stamping Pipe Buckle.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Greenhouses Flat Timber Connector, computer and recording tapes, and electrical insulation.CNC Machining Parts. It does not absorb moisture, but does absorb oil;Machining Parts-, soil-, and fire-Casting Machining. Its low absorbency also makes it naturally resistant to stains.Precision Machining Parts,Precision Machining.Other Machining, and not damaged by mildew.Custom CNC Hinge, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Mechanical Door Lock-based E.I. du Pont de Nemours and Co.Machining Sleeve. This early research, headed by W.H. Carothers,Aluminum CNC Machining, 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,Aluminum Keyboard Case. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.CNC Machined shell of mini desktop computer,Disc Washer. 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.Precision Washer, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Gasket For Other Purposes.

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 Washer. In this process, ethylene is the polymer, the chemical building block of polyester,Curved Spring Washer.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Spring Washer. The four basic forms are filament,Size Flat Pad, tow, and fiberfill. In the filament form,Aluminum Oxide Color Washer, producing smooth-Machining Anti Theft Nut.Butterfly Nut, filaments are cut to short,Knurled Nut.Brass Nut. 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.Diamond Nut.

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-Four Grip Nut,Other Nuts, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Long Hexagon Nut. 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 Hex Nut, which are usually round,Hexagon Full Hole Slotted Insert Nut. The number of holes in the spinneret determines the size of the yarn,Hexagon Flange Nut with Anti Slip Teeth.
• 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,Hexagon Socket Nut. 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,Hexagon Nut.
• Hand Tightening Screw,Hand Screw. Also,Quincunx Slotted Round Head Screw,Quincunx Slotted Cylindrical Head Screw.

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 Knurled Cylindrical Head Screw

Hexagon Socket Countersunk Head Screw, 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 Socket Machine Screw. The rope-Slotted Round Head Screw.

Drawing tow

• 1 Newly-Slotting Machine Screw.Screw.

Crimping

• 2 Drawn tow is then fed into compression boxes,Long Bolt With Washer, at a rate of 9-15 crimps per inch (3-6 per cm).Multi Purpose Bolt.

Setting

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

Cutting

• 4 Following heat setting,Flower Basket 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)Handle Cam Rod Bolt.Other Bolts, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Hexagon Bolt With Intermediate.

The Future

Hexagon Head Bolt,Round Head Bolt's fastest-growing fiber.T-shaped Countersunk Head Bolt. 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,Hexagon Socket Countersunk Head Bolt, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Cross Countersunk Head Bolt. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Countersunk Head Bolt, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.