Polyester

Background

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

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

History

In 1926,Kn95 Masks-based E.I. du Pont de Nemours and Co.Disposable Surgical Mask. This early research, headed by W.H. Carothers,Disposable Face 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,Face Mask Protective Gasket. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Disposable Surgical Masks,Disposable Medical 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.Disposable Medical Masks, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Disposable Non-medical 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 Woven Three Layer Ear Hanging Mask. In this process, ethylene is the polymer, the chemical building block of polyester,Disposable Non-medical Masks.

The Manufacturing
Process

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

Drying

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

Spring Washer

Size Flat Pad, 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,Aluminum Oxide Color Washer. The rope-Machining Anti Theft Nut.

Drawing tow

• 1 Newly-Butterfly Nut.Knurled Nut.

Crimping

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

Setting

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

Cutting

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

The Future

Hexagon Socket Nut,Hexagon Nut's fastest-growing fiber.Hand Tightening 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,Hand Screw, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Quincunx Slotted Round Head Screw. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Quincunx Slotted 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.