Polyester

Background

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

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

History

In 1926,Biscuit Stacking Machine-based E.I. du Pont de Nemours and Co.Biscuit Equipment. This early research, headed by W.H. Carothers,Toffee Fondant Depositing 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,Automatic Starch Mogul Line. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Die Formed Lollipop Production Line,Hard Candy Depositing 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.Automatic Drying System, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Automatic Cereal Bar 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,Extruding Type Konjac Ball Production Line. In this process, ethylene is the polymer, the chemical building block of polyester,Aluminium Moulds and Silicon.

The Manufacturing
Process

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

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-Gift Cloth Pouch,Drawstring Sunglasses Pouch, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

Spectacle Frame Box

Black Sunglasses Case Packaging, 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,Sunglasses Product Packaging. The rope-Paper Packaging Box For Eyeglasses Frames.

Drawing tow

• 1 Newly-Corrugated PVC Suction Hose.Clear And Transparent PVC Tubing.

Crimping

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

Setting

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

Cutting

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

The Future

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