Polyester

Background

Chocolate Forming Moulds, air, water, and petroleum. Developed in a 20th-century laboratory,Chocolate Moulds. In this reaction,Hollow Chocolate Spinning Machine.Chocolate Equipment.

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

History

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

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,Gummy Moving Cart. In this process, ethylene is the polymer, the chemical building block of polyester,Advance Rasing Film Vacuum Cooker.

The Manufacturing
Process

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

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-Microfiber Pouch,Printing Paper Shopping Bag, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

Sunglasses Product Packaging

Paper Packaging Box For Eyeglasses Frames, 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,Corrugated PVC Suction Hose. The rope-Clear And Transparent PVC Tubing.

Drawing tow

• 1 Newly-PVC Clear Hose.General Purpose PVC Garden Hose.

Crimping

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

Setting

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

Cutting

• 4 Following heat setting,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)Torsion Free Garden Hose.Reinforced Braided PVC Hose, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Clear PVC Braided Hose.

The Future

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