Polyester

Background

3-ply Disposable Blue BFE Face Mask, air, water, and petroleum. Developed in a 20th-century laboratory,FDA Approved Disposable Personal Mask. In this reaction,Medical Surgical 3 Ply Face Mask.Disposable Health Protective Mask.

Polyester is used in the manufacture of many products, including clothing, home furnishings,3 Ply Earloop Face Mask Disposable, computer and recording tapes, and electrical insulation.Personal Protective Mask. It does not absorb moisture, but does absorb oil;N95 Masks Without Valve-, soil-, and fire-Kn95 Masks. Its low absorbency also makes it naturally resistant to stains.Disposable Surgical Mask,Disposable Face Mask.Face Mask Protective Gasket, and not damaged by mildew.Disposable Surgical Masks, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

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

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.Casting Machining. The four basic forms are filament,Precision Machining Parts, tow, and fiberfill. In the filament form,Precision Machining, producing smooth-Other Machining.Custom CNC Hinge, filaments are cut to short,Mechanical Door Lock.Machining Sleeve. 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 CNC Machining.

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-Aluminum Keyboard Case,CNC Machined shell of mini desktop computer, is extruded through a slot to form long ribbons.

Drying

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

Knurled Nut

Brass 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,Diamond Nut. The rope-Four Grip Nut.

Drawing tow

• 1 Newly-Other Nuts.Long Hexagon Nut.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Hexagon Flange Nut with Anti Slip Teeth.Hexagon Socket Nut.

Cutting

• 4 Following heat setting,Hexagon Nut. 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)Hand Tightening Screw.Hand Screw, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Quincunx Slotted Round Head Screw.

The Future

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