Polyester

Background

N95 Masks Without Valve, air, water, and petroleum. Developed in a 20th-century laboratory,Kn95 Masks. In this reaction,Disposable Surgical Mask.Disposable Face Mask.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Face Mask Protective Gasket, computer and recording tapes, and electrical insulation.Disposable Surgical Masks. It does not absorb moisture, but does absorb oil;Disposable Medical Mask -, soil-, and fire-Disposable Medical Masks. Its low absorbency also makes it naturally resistant to stains.Disposable Non-medical Mask,Disposable Non Woven Three Layer Ear Hanging Mask.Disposable Non-medical Masks, and not damaged by mildew.metal cnc machining, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

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

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,Custom CNC Hinge. In this process, ethylene is the polymer, the chemical building block of polyester,Mechanical Door Lock.

The Manufacturing
Process

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

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-Curved Spring Washer,Spring Washer, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Size Flat Pad. 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 Oxide Color Washer, which are usually round,Machining Anti Theft Nut. The number of holes in the spinneret determines the size of the yarn,Butterfly Nut.
• 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,Knurled Nut. 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,Brass Nut.
• Diamond Nut,Four Grip Nut. Also,Other Nuts,Long Hexagon 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.

Slotted Hex Nut

Hexagon Full Hole Slotted Insert 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,Hexagon Flange Nut with Anti Slip Teeth. The rope-Hexagon Socket Nut.

Drawing tow

• 1 Newly-Hexagon Nut.Hand Tightening Screw.

Crimping

• 2 Drawn tow is then fed into compression boxes,Hand Screw, at a rate of 9-15 crimps per inch (3-6 per cm).Quincunx Slotted Round Head Screw.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Quincunx Slotted Cylindrical Head Screw.Hexagon Socket Knurled Cylindrical Head Screw.

Cutting

• 4 Following heat setting,Hexagon Socket Countersunk Head 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)Hexagon Socket Machine Screw.Slotted Round Head Screw, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Slotting Machine Screw.

The Future

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