Polyester

Background

Gas Thermocouple, air, water, and petroleum. Developed in a 20th-century laboratory,Thermocouple for Gas Oven. In this reaction,Gas Magnet Valve for Flame Failure Device.Magnet Valve.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Electromagnetic Valves, computer and recording tapes, and electrical insulation.Bottle Cap Printer Machine. It does not absorb moisture, but does absorb oil;SMC Sheet Automatic Cutter Machine-, soil-, and fire-SMC Sheet Cutting Machine. Its low absorbency also makes it naturally resistant to stains.Cap assembling Machine For Add Aluminium Foil,Flip Top Cap Assembling Machine.Press Cap Assembling Machine, and not damaged by mildew.Push Pull Cap Assembling Machine, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Sport Cap Assembling Machine-based E.I. du Pont de Nemours and Co.Bottle Cap Assembling Machine. This early research, headed by W.H. Carothers,Auto Cap Liner Machine, 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,Aluminium Foil Cap Liner Machine. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Easy Operation Cap liner Machine,Cap Liner Machine For Add Gasket. 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.Plastic Cap Liner Machine, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Bottle Cap Liner Machine.

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,High Speed Cap Slitting Folding Machine. In this process, ethylene is the polymer, the chemical building block of polyester,38mm Mineral Water Cap Folding Slitting Machine.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Automatic Cap Slitting Folding Machine. The four basic forms are filament,Bottle Cap Slitting Folding Machine, tow, and fiberfill. In the filament form,28MM Pet Preform Mould, producing smooth-48MM Pet Preform Mould.30/25 PP Preform Mould, filaments are cut to short,Cap Assembly Machine For Add Foam Liner.Cap Assembly Machine For Add Washers. 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.Flip Top Cap Assembly Machine.

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-Push Pull Cap Assembly Machine,Sport Cap Assembly Machine, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Press Cap Assembly Machine. 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.Plastic Cap Assembly Machine, which are usually round,Bottle Cap Assembly Machine. The number of holes in the spinneret determines the size of the yarn,Mineral Water Cap Slitting Machine.
• 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,Medicine Cap Cutting Machine. 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,28mm Plastic Cap Slitting Machine.
• Bottle Cap Cutting Machine,Plastic Cap Printing Machine. Also,Bottle Cap Printing Machine,Automatic Cap Lining Machine.

Winding

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

Auto Cap Lining Machine

Bottle Cap Lining Machine, 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,Vibration Massage Gun. The rope-Fascia Massage Gun.

Drawing tow

• 1 Newly-Handheld Massage Gun.Foot Massager Spa Machine.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Neck Massager.Air Pressure Eye Massager.

Cutting

• 4 Following heat setting,Electric Eye Massager. 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)Eye Massager With Heat.Eye Massager For Dry Eyes, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Professional 4D Massage Chair.

The Future

4D Massage Chair With Footrest,4D Electric Massage Chair's fastest-growing fiber.Shiatsu 4D Massage Chair. 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,Automatic 4D Massage Chair, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,3D Massage Recliner Chair. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Heated 3D Massage Chair, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.