Polyester

Background

Chocolate Tempering Machine, air, water, and petroleum. Developed in a 20th-century laboratory,Chocolate Blocks Crusher. In this reaction,Chocolate Paste Making Equipment.Chocolate Forming Moulds.

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

History

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

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,Automatic Cereal Bar Line. In this process, ethylene is the polymer, the chemical building block of polyester,Extruding Type Konjac Ball Production Line.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Aluminium Moulds and Silicon. The four basic forms are filament,Gummy Moving Cart, tow, and fiberfill. In the filament form,Advance Rasing Film Vacuum Cooker, producing smooth-Vacuum Batch Type Cooker.Gummy Kitchen System, filaments are cut to short,Advance Gummy Production Line.Gummy Machines. 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.Cloth Bag For Gift.

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-Cloth Christmas Gift Bag,Gift Cloth Pouch, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

Packaging For Sunglasses

Spectacle Frame Box, 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,Black Sunglasses Case Packaging. The rope-Sunglasses Product Packaging.

Drawing tow

• 1 Newly-Paper Packaging Box For Eyeglasses Frames.Corrugated PVC Suction Hose.

Crimping

• 2 Drawn tow is then fed into compression boxes,Clear And Transparent PVC Tubing, at a rate of 9-15 crimps per inch (3-6 per cm).PVC Clear Hose.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)General Purpose PVC Garden Hose.Non-kink PVC Garden Hose.

Cutting

• 4 Following heat setting,Home PVC Garden 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)Flexible PVC Garden Hose.Anti-UV PVC Garden Hose, such ascarpet,polyester filaments are cut into 6 inch (15 cm)PVC Garden Hose.

The Future

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