Polyester

Background

Four Wheels Electric Logistic Car J2-P, air, water, and petroleum. Developed in a 20th-century laboratory,Delivery Food Scooter Smart Truck. In this reaction,New Green Energy Car Four Wheels.Passager Electric Vehicle Four Wheels.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Electric Car Automatic Control Family New Cars, computer and recording tapes, and electrical insulation.Fast Food Delivery Electric Dumper Cargo Truck. It does not absorb moisture, but does absorb oil;Three Wheels Battery Electric Tipper Truck-, soil-, and fire-Lithium Iron Phosphate Battery Three Wheels Dumper Electric Car. Its low absorbency also makes it naturally resistant to stains.3-ply Disposable Blue BFE Face Mask,FDA Approved Disposable Personal Mask.Medical Surgical 3 Ply Face Mask, and not damaged by mildew.Disposable Health Protective Mask, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,3 Ply Earloop Face Mask Disposable-based E.I. du Pont de Nemours and Co.Personal Protective Mask. This early research, headed by W.H. Carothers,N95 Masks Without Valve, 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,Kn95 Masks. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Disposable Surgical Mask,Disposable Face Mask. 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.Face Mask Protective Gasket, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Disposable Surgical Masks.

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 Medical Mask . In this process, ethylene is the polymer, the chemical building block of polyester,Disposable Medical Masks.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Disposable Non-medical Mask. The four basic forms are filament,Disposable Non Woven Three Layer Ear Hanging Mask, tow, and fiberfill. In the filament form,Disposable Non-medical Masks, producing smooth-metal cnc machining.Stamping Pipe Buckle, filaments are cut to short,Greenhouses Flat Timber Connector.CNC Machining Parts. 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.Machining Parts.

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-Casting Machining,Precision Machining Parts, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Precision Machining. 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 Machining, which are usually round,Custom CNC Hinge. The number of holes in the spinneret determines the size of the yarn,Mechanical Door Lock.
• 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,Machining Sleeve. 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 CNC Machining.
• Aluminum Keyboard Case,CNC Machined shell of mini desktop computer. Also,Disc Washer,Precision 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.

Gasket For Other Purposes

Other 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,Curved Spring Washer. The rope-Spring Washer.

Drawing tow

• 1 Newly-Size Flat Pad.Aluminum Oxide Color Washer.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Knurled Nut.Brass Nut.

Cutting

• 4 Following heat setting,Diamond 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)Four Grip Nut.Other Nuts, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Long Hexagon Nut.

The Future

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