Polyester

Background

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

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

History

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

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,Auto Radiator. In this process, ethylene is the polymer, the chemical building block of polyester,Electronic Cigarette Atomizer Hood.

The Manufacturing
Process

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

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-Die head,CNC Parts Manufacturer, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

5 Axis CNC

Type of CNC Machines, 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,Copper Nut. The rope-Brass nut.

Drawing tow

• 1 Newly-Automatic Machine Parts.Balance Shaft for Cars.

Crimping

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

Setting

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

Cutting

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

The Future

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