Polyester

Background

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

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

History

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

The Manufacturing
Process

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

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

Drying

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

Winding

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

Long Hexagon Nut

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

Drawing tow

• 1 Newly-Hexagon Socket Nut.Hexagon Nut.

Crimping

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

Setting

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

Cutting

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

The Future

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