Polyester

Background

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

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

History

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

The Manufacturing
Process

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

Drying

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

Quincunx Slotted Cylindrical Head Screw

Hexagon Socket Knurled Cylindrical 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 Countersunk Head Screw. The rope-Hexagon Socket Machine Screw.

Drawing tow

• 1 Newly-Slotted Round Head Screw.Slotting Machine Screw.

Crimping

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

Setting

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

Cutting

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

The Future

Hexagon Bolt With Intermediate,Hexagon Head Bolt's fastest-growing fiber.Round 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,T-shaped Countersunk Head Bolt, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Hexagon Socket Countersunk Head Bolt. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Cross 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.