Polyester

Background

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

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

History

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

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

The Manufacturing
Process

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

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-Disc Washer,Precision Washer, is extruded through a slot to form long ribbons.

Drying

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

Diamond Nut

Four Grip 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,Other Nuts. The rope-Long Hexagon Nut.

Drawing tow

• 1 Newly-Slotted Hex Nut.Hexagon Full Hole Slotted Insert Nut.

Crimping

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

Setting

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

Cutting

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

The Future

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