Polyester

Background

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

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

History

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

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,Machining Sleeve. In this process, ethylene is the polymer, the chemical building block of polyester,Aluminum CNC Machining.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Aluminum Keyboard Case. The four basic forms are filament,CNC Machined shell of mini desktop computer, tow, and fiberfill. In the filament form,Disc Washer, producing smooth-Precision Washer.Gasket For Other Purposes, filaments are cut to short,Other Washer.Curved Spring Washer. 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.Spring 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-Size Flat Pad,Aluminum Oxide Color Washer, is extruded through a slot to form long ribbons.

Drying

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

Hexagon Socket Nut, 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 Nut. The rope-Hand Tightening Screw.

Drawing tow

• 1 Newly-Hand Screw.Quincunx Slotted Round Head Screw.

Crimping

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

Setting

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

Cutting

• 4 Following heat setting,Slotted Round Head 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)Slotting Machine Screw.Screw, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Long Bolt With Washer.

The Future

Multi Purpose Bolt,Anchor Bolt's fastest-growing fiber.Eyebolt. 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,Flower Basket Bolt, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Handle Cam Rod Bolt. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Other Bolts, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.