Polyester

Background

Self-stick Hooks, air, water, and petroleum. Developed in a 20th-century laboratory,Self-stick Hooks. In this reaction,New Style Metal Hooks.Over Door Metal Hooks.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Over Door Metal Hook with Basket, computer and recording tapes, and electrical insulation.Telescoping Pedestal Paper Holder. It does not absorb moisture, but does absorb oil;Paper Holder-, soil-, and fire-Rubber Foot Pads. Its low absorbency also makes it naturally resistant to stains.Black Felt Foot Pads,Self-adhesive Felt Foot Pads Furniture.Felt Foot Pads For Desk Legs, and not damaged by mildew.Rectangle Felt Foot Pads, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Black Square Felt Foot Pads-based E.I. du Pont de Nemours and Co.Strong Adhesives Felt Foot Pads. This early research, headed by W.H. Carothers,Chrome Plated Bathroom Accessories Kit, 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,Accessories. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.3D Printer V-Wheel,Auto Radiator. 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.Electronic Cigarette Atomizer Hood, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.CNC Axis Types.

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,Aluminum Bar. In this process, ethylene is the polymer, the chemical building block of polyester,CNC Milling Machine Parts.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Milling Small Parts. The four basic forms are filament,Hardware Decoration, tow, and fiberfill. In the filament form,High Speed CNC Milling, producing smooth-Cell Phone Frame.Mobile Phone Frame, filaments are cut to short,Die head.CNC Parts Manufacturer. 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.Unmanned Plane 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-CNC Lathe Parts Charging Pile,Assembled box, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Light Cover. 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.Lamp Housing, which are usually round,Medical Instrument Parts. The number of holes in the spinneret determines the size of the yarn,Surgical Instrument Parts.
• 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 Machining Medical Devices. 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,Flashlight Parts.
• Camera cover,5 Axis CNC. Also,Type of CNC Machines,Copper 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.

Brass nut

Automatic Machine Parts, 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,Balance Shaft for Cars. The rope-Metal Parts Manufacturer.

Drawing tow

• 1 Newly-Electric Toothbrush Parts.Forehead Thermometer Parts.

Crimping

• 2 Drawn tow is then fed into compression boxes,Automobile Electric Solenoid Valve, at a rate of 9-15 crimps per inch (3-6 per cm).Face Mask Machine Parts.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Massage Chair Parts.Massage Push Rod of Chair.

Cutting

• 4 Following heat setting,Small radar cover. 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)Twist Pin.Electronic Cigarette Retainer Ring, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Cutter Shaft of Mower.

The Future

Electronic Cigarette Base,Electronic Cigarette Retainer Ring Neck's fastest-growing fiber.Auto Engine Parts. 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,Mouthpiece for Electronics Cigarettes, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Electronic Cigarette Holder. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Custom Steel Turning Parts, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.