Polyester

Background

Electric Car Automatic Control Family New Cars, air, water, and petroleum. Developed in a 20th-century laboratory,Fast Food Delivery Electric Dumper Cargo Truck. In this reaction,Three Wheels Battery Electric Tipper Truck.Lithium Iron Phosphate Battery Three Wheels Dumper Electric Car.

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

History

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

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,Disposable Non-medical Masks. In this process, ethylene is the polymer, the chemical building block of polyester,metal cnc machining.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Stamping Pipe Buckle. The four basic forms are filament,Greenhouses Flat Timber Connector, tow, and fiberfill. In the filament form,CNC Machining Parts, producing smooth-Machining Parts.Casting Machining, filaments are cut to short,Precision Machining Parts.Precision Machining. 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.Other 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-Custom CNC Hinge,Mechanical Door Lock, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Machining Sleeve. 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.Aluminum CNC Machining, which are usually round,Aluminum Keyboard Case. The number of holes in the spinneret determines the size of the yarn,CNC Machined shell of mini desktop computer.
• 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,Disc 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,Precision Washer.
• Gasket For Other Purposes,Other Washer. Also,Curved Spring Washer,Spring Washer.

Winding

• 8 After the polyester yarn is drawn, it is wound on large bobbins or flat-wound packages, ready to be woven into material.

Size Flat Pad

Aluminum Oxide Color Washer, 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,Machining Anti Theft Nut. The rope-Butterfly Nut.

Drawing tow

• 1 Newly-Knurled Nut.Brass Nut.

Crimping

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

Setting

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

Cutting

• 4 Following heat setting,Slotted Hex 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)Hexagon Full Hole Slotted Insert Nut.Hexagon Flange Nut with Anti Slip Teeth, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Hexagon Socket Nut.

The Future

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