Polyester

Background

Chocolate Slicing Machine, air, water, and petroleum. Developed in a 20th-century laboratory,Small Chocolate Machine. In this reaction,Chocolate Enrobing Line.Chocolate Tempering Machine.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Chocolate Blocks Crusher, computer and recording tapes, and electrical insulation.Chocolate Paste Making Equipment. It does not absorb moisture, but does absorb oil;Chocolate Forming Moulds-, soil-, and fire-Chocolate Moulds. Its low absorbency also makes it naturally resistant to stains.Hollow Chocolate Spinning Machine,Chocolate Equipment.Sandwiching and Packaging, and not damaged by mildew.Rotary Rack Oven, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Rack Oven-based E.I. du Pont de Nemours and Co.Automatic Multifunctional Biscuit Production Line. This early research, headed by W.H. Carothers,Automatic Multifunctional Biscuit Production Line, 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,Soft Biscuit Rotary Moulder. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Biscuit Stacking Machine,Biscuit Equipment. 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.Toffee Fondant Depositing Line, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Automatic Starch Mogul Line.

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,Die Formed Lollipop Production Line. In this process, ethylene is the polymer, the chemical building block of polyester,Hard Candy Depositing Line.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Automatic Drying System. The four basic forms are filament,Automatic Cereal Bar Line, tow, and fiberfill. In the filament form,Extruding Type Konjac Ball Production Line, producing smooth-Aluminium Moulds and Silicon.Gummy Moving Cart, filaments are cut to short,Advance Rasing Film Vacuum Cooker.Vacuum Batch Type Cooker. 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.Gummy Kitchen System.

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-Advance Gummy Production Line,Gummy Machines, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Cloth Bag For Gift. 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.Cloth Christmas Gift Bag, which are usually round,Gift Cloth Pouch. The number of holes in the spinneret determines the size of the yarn,Drawstring Sunglasses Pouch.
• 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,Microfiber Pouch. 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,Printing Paper Shopping Bag.
• Shopping Gift Paper Bag For Packaging,Paper Bags. Also,Soft Microfiber Cleaning Cloth For Jewelry,Jewelry Polishing Cleaning Cloth Printed.

Winding

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

Microfiber Camera Cleaning Cloth

Camera Cleaning Cloth, 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,Cleaning Cloth For Eyeglasses. The rope-Packaging For Sunglasses.

Drawing tow

• 1 Newly-Spectacle Frame Box.Black Sunglasses Case Packaging.

Crimping

• 2 Drawn tow is then fed into compression boxes,Sunglasses Product Packaging, at a rate of 9-15 crimps per inch (3-6 per cm).Paper Packaging Box For Eyeglasses Frames.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Corrugated PVC Suction Hose.Clear And Transparent PVC Tubing.

Cutting

• 4 Following heat setting,PVC Clear Hose. 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)General Purpose PVC Garden Hose.Non-kink PVC Garden Hose, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Home PVC Garden Hose.

The Future

Flexible PVC Garden Hose,Anti-UV PVC Garden Hose's fastest-growing fiber.PVC Garden Hose. 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,Torsion Free Garden Hose, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Reinforced Braided PVC Hose. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Clear PVC Braided Hose, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.