Polyester

Background

Face Mask Protective Gasket, air, water, and petroleum. Developed in a 20th-century laboratory,Disposable Surgical Masks. In this reaction,Disposable Medical Mask .Disposable Medical Masks.

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

History

In 1926,Casting Machining-based E.I. du Pont de Nemours and Co.Precision Machining Parts. This early research, headed by W.H. Carothers,Precision 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,Other Machining. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Custom CNC Hinge,Mechanical Door Lock. 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.Machining Sleeve, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Aluminum CNC Machining.

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,Aluminum Keyboard Case. In this process, ethylene is the polymer, the chemical building block of polyester,CNC Machined shell of mini desktop computer.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Disc Washer. The four basic forms are filament,Precision Washer, tow, and fiberfill. In the filament form,Gasket For Other Purposes, producing smooth-Other Washer.Curved Spring Washer, filaments are cut to short,Spring Washer.Size Flat Pad. 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.Aluminum Oxide Color Washer.

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-Machining Anti Theft Nut,Butterfly Nut, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Knurled 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.Brass Nut, which are usually round,Diamond Nut. The number of holes in the spinneret determines the size of the yarn,Four Grip 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,Other Nuts. 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 Hexagon Nut.
• Slotted Hex Nut,Hexagon Full Hole Slotted Insert Nut. Also,Hexagon Flange Nut with Anti Slip Teeth,Hexagon Socket Nut.

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 Nut

Hand Tightening 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,Hand Screw. The rope-Quincunx Slotted Round Head Screw.

Drawing tow

• 1 Newly-Quincunx Slotted Cylindrical Head Screw.Hexagon Socket Knurled Cylindrical Head Screw.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Slotted Round Head Screw.Slotting Machine Screw.

Cutting

• 4 Following heat setting,Screw. 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)Long Bolt With Washer.Multi Purpose Bolt, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Anchor Bolt.

The Future

Eyebolt,Flower Basket Bolt's fastest-growing fiber.Handle Cam Rod 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,Other Bolts, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Hexagon Bolt With Intermediate. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Hexagon 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.