Polyester

Background

White Multi-functional Storagemetal Basket, air, water, and petroleum. Developed in a 20th-century laboratory,Self-stick double hooks. In this reaction,Self-stick Hooks.Self-stick Hooks.

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

History

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

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,Electronic Cigarette Atomizer Hood. In this process, ethylene is the polymer, the chemical building block of polyester,CNC Axis Types.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Aluminum Bar. The four basic forms are filament,CNC Milling Machine Parts, tow, and fiberfill. In the filament form,Milling Small Parts, producing smooth-Hardware Decoration.High Speed CNC Milling, filaments are cut to short,Cell Phone Frame.Mobile Phone Frame. 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.Die head.

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 Parts Manufacturer,Unmanned Plane Parts, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

Type of CNC Machines

Copper 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,Brass nut. The rope-Automatic Machine Parts.

Drawing tow

• 1 Newly-Balance Shaft for Cars.Metal Parts Manufacturer.

Crimping

• 2 Drawn tow is then fed into compression boxes,Electric Toothbrush Parts, at a rate of 9-15 crimps per inch (3-6 per cm).Forehead Thermometer Parts.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Automobile Electric Solenoid Valve.Face Mask Machine Parts.

Cutting

• 4 Following heat setting,Massage Chair Parts. 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)Massage Push Rod of Chair.Small radar cover, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Twist Pin.

The Future

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