Polyester

Background

Disposable Health Protective Mask, air, water, and petroleum. Developed in a 20th-century laboratory,3 Ply Earloop Face Mask Disposable. In this reaction,Personal Protective Mask.N95 Masks Without Valve.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Kn95 Masks, computer and recording tapes, and electrical insulation.Disposable Surgical Mask. It does not absorb moisture, but does absorb oil;Disposable Face Mask-, soil-, and fire-Face Mask Protective Gasket. Its low absorbency also makes it naturally resistant to stains.Disposable Surgical Masks,Disposable Medical Mask .Disposable Medical Masks, and not damaged by mildew.Disposable Non-medical Mask, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Disposable Non Woven Three Layer Ear Hanging Mask-based E.I. du Pont de Nemours and Co.Disposable Non-medical Masks. This early research, headed by W.H. Carothers,metal 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,Stamping Pipe Buckle. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Greenhouses Flat Timber Connector,CNC Machining Parts. 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 Parts, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Casting 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,Precision Machining Parts. In this process, ethylene is the polymer, the chemical building block of polyester,Precision Machining.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Other Machining. The four basic forms are filament,Custom CNC Hinge, tow, and fiberfill. In the filament form,Mechanical Door Lock, producing smooth-Machining Sleeve.Aluminum CNC Machining, filaments are cut to short,Aluminum Keyboard Case.CNC Machined shell of mini desktop computer. 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.Disc 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-Precision Washer,Gasket For Other Purposes, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Other Washer. 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.Curved Spring Washer, which are usually round,Spring Washer. The number of holes in the spinneret determines the size of the yarn,Size Flat Pad.
• 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,Aluminum Oxide Color Washer. 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,Machining Anti Theft Nut.
• Butterfly Nut,Knurled Nut. Also,Brass Nut,Diamond 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.

Four Grip Nut

Other Nuts, 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,Long Hexagon Nut. The rope-Slotted Hex Nut.

Drawing tow

• 1 Newly-Hexagon Full Hole Slotted Insert Nut.Hexagon Flange Nut with Anti Slip Teeth.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Hand Tightening Screw.Hand Screw.

Cutting

• 4 Following heat setting,Quincunx 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)Quincunx Slotted Cylindrical Head Screw.Hexagon Socket Knurled Cylindrical Head Screw, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Hexagon Socket Countersunk Head Screw.

The Future

Hexagon Socket Machine Screw,Slotted Round Head Screw's fastest-growing fiber.Slotting Machine Screw. 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,Screw, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Long Bolt With Washer. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Multi Purpose Bolt, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.