Polyester

Background

SMC Sheet Automatic Cutter Machine, air, water, and petroleum. Developed in a 20th-century laboratory,SMC Sheet Cutting Machine. In this reaction,Cap assembling Machine For Add Aluminium Foil.Flip Top Cap Assembling Machine.

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

History

In 1926,Plastic Cap Liner Machine-based E.I. du Pont de Nemours and Co.Bottle Cap Liner Machine. This early research, headed by W.H. Carothers,High Speed Cap Slitting Folding 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 1946,38mm Mineral Water Cap Folding Slitting Machine. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Automatic Cap Slitting Folding Machine,Bottle 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.28MM Pet Preform Mould, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.48MM Pet Preform Mould.

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,30/25 PP Preform Mould. In this process, ethylene is the polymer, the chemical building block of polyester,Cap Assembly Machine For Add Foam Liner.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Cap Assembly Machine For Add Washers. The four basic forms are filament,Flip Top Cap Assembly Machine, tow, and fiberfill. In the filament form,Push Pull Cap Assembly Machine, producing smooth-Sport Cap Assembly Machine.Press Cap Assembly Machine, filaments are cut to short,Plastic Cap Assembly Machine.Bottle 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.Mineral Water Cap Slitting 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-Medicine Cap Cutting Machine,28mm Plastic Cap Slitting Machine, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Bottle Cap Cutting 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 Printing Machine, which are usually round,Bottle Cap Printing Machine. The number of holes in the spinneret determines the size of the yarn,Automatic Cap Lining 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,Auto Cap Lining 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 Lining Machine.
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Winding

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

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Electric Hand Massager Tool, 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,Neck Massager. The rope-Air Pressure Eye Massager.

Drawing tow

• 1 Newly-Electric Eye Massager.Eye Massager With Heat.

Crimping

• 2 Drawn tow is then fed into compression boxes,Eye Massager For Dry Eyes, at a rate of 9-15 crimps per inch (3-6 per cm).Professional 4D Massage Chair.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)4D Massage Chair With Footrest.4D Electric Massage Chair.

Cutting

• 4 Following heat setting,Shiatsu 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)Automatic 4D Massage Chair.3D Massage Recliner Chair, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Heated 3D Massage Chair.

The Future

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