Polyester

Background

metal cnc machining, air, water, and petroleum. Developed in a 20th-century laboratory,Stamping Pipe Buckle. In this reaction,Greenhouses Flat Timber Connector.CNC Machining Parts.

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

History

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

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

The Manufacturing
Process

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

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-Long Hexagon Nut,Slotted Hex Nut, is extruded through a slot to form long ribbons.

Drying

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

Slotted Round 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,Slotting Machine Screw. The rope-Screw.

Drawing tow

• 1 Newly-Long Bolt With Washer.Multi Purpose Bolt.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Flower Basket Bolt.Handle Cam Rod Bolt.

Cutting

• 4 Following heat setting,Other Bolts. 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)Hexagon Bolt With Intermediate.Hexagon Head Bolt, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Round Head Bolt.

The Future

T-shaped Countersunk Head Bolt,Hexagon Socket Countersunk Head Bolt's fastest-growing fiber.Cross 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,Countersunk Head Bolt, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Bolt. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.300ML Electric adhesive dispensing gun, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.