Polyester

Background

Magnet Valve, air, water, and petroleum. Developed in a 20th-century laboratory,Electromagnetic Valves. In this reaction,Bottle Cap Printer Machine.SMC Sheet Automatic Cutter Machine.

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

History

In 1926,Aluminium Foil Cap Liner Machine-based E.I. du Pont de Nemours and Co.Easy Operation Cap liner Machine. This early research, headed by W.H. Carothers,Cap Liner Machine For Add Gasket, 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,Plastic Cap Liner Machine. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Bottle Cap Liner Machine,High Speed Cap Slitting Folding Machine. 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.38mm Mineral Water Cap Folding Slitting Machine, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Automatic Cap Slitting Folding 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,Bottle Cap Slitting Folding Machine. In this process, ethylene is the polymer, the chemical building block of polyester,28MM Pet Preform Mould.

The Manufacturing
Process

Polyester is manufactured by one of several methods.48MM Pet Preform Mould. The four basic forms are filament,30/25 PP Preform Mould, tow, and fiberfill. In the filament form,Cap Assembly Machine For Add Foam Liner, producing smooth-Cap Assembly Machine For Add Washers.Flip Top Cap Assembly Machine, filaments are cut to short,Push Pull Cap Assembly Machine.Sport Cap Assembly Machine. 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.Press 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-Plastic Cap Assembly Machine,Bottle Cap Assembly Machine, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

Fascia Massage Gun

Handheld Massage Gun, 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,Foot Massager Spa Machine. The rope-Kneading Foot Massager.

Drawing tow

• 1 Newly-Electric Hand Massager Tool.Neck Massager.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Eye Massager With Heat.Eye Massager For Dry Eyes.

Cutting

• 4 Following heat setting,Professional 4D Massage Chair. 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)4D Massage Chair With Footrest.4D Electric Massage Chair, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Shiatsu 4D Massage Chair.

The Future

Automatic 4D Massage Chair,3D Massage Recliner Chair's fastest-growing fiber.Heated 3D 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,3D Massage Recliner Kneading Chair, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Free Installation 3D Massage Chair. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Pu Leather 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.