Polyester

Background

gland type limited expansion joint, air, water, and petroleum. Developed in a 20th-century laboratory,single flange dismantling joint. In this reaction,Dismantling Duble Fange Dsmantling Joint.single sphere rubber joint.

Polyester is used in the manufacture of many products, including clothing, home furnishings,DIN rubber expansion joint, computer and recording tapes, and electrical insulation.EPDM rubber expansion joint. It does not absorb moisture, but does absorb oil;concentric reducer rubber joint-, soil-, and fire-clamp type flexing rubber joint. Its low absorbency also makes it naturally resistant to stains.rubber check valve flanged,sleeve Duckbill valve XH81.Small Plastic Clip, and not damaged by mildew.Small Plastic Clip, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Clear Mini Plastic Clip-based E.I. du Pont de Nemours and Co.Mini Plastic Clip. This early research, headed by W.H. Carothers,A5 Plastic Clipboard, 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,Clear A4 Plastic Clipboard. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Transparent Magnet,Magnet. 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.Double Card Injection Moulding Name Badge, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.PS Injection Moulding Name Badge.

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,Injection Moulding Name Badge. In this process, ethylene is the polymer, the chemical building block of polyester,PVC Frosted Name Badge.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Frosted Name Badge With Metal Clip. The four basic forms are filament,Frosted Name Badge, tow, and fiberfill. In the filament form,Printable Heart Shape Mini Cutter, producing smooth-Heart Shape Mini Cutter.Clear Circle Shape Mini Cutter, filaments are cut to short,Small And Exquisite Multicolor Stationery Item.Multicolor Stationery Item. 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.Delicate Customizable Stationery Item.

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-Customizable Stationery Item,Delicate Plastic Stationery Item, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Mini Plastic Stationery Item. 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 Stationery Item, which are usually round,Stationery Item. The number of holes in the spinneret determines the size of the yarn,PP Pen Box With Various Styles.
• 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,Plastic Double Side Pencil Case. 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,Customizable PP Pencil Case.
• Pinkycolor PP Pencil Case,High-quality PP Pencil Case. Also,PP Pencil Case,Multicolor Plastic Pencil Case.

Winding

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

Printable Plastic Pencil Case

Solid Color PP Pen Case, 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,PP Pen Case With Logo. The rope-Plastic Pen Case.

Drawing tow

• 1 Newly-Pen Case.Silicone Coated Parts.

Crimping

• 2 Drawn tow is then fed into compression boxes,Silicone Pad, at a rate of 9-15 crimps per inch (3-6 per cm).Silicone Gasket.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Silicone Sealing Ring.Silicone Accessories.

Cutting

• 4 Following heat setting,Silicone Special-Shaped Waterproof Ring. 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)Rubber Sealed Loop.Silicone Pacifier, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Silicone Nail Pad.

The Future

Silicone Beauty Scrubbing Pad,Silicone Molars's fastest-growing fiber.Silicone Baby Bottle Cover. 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,Silicone Face Brush, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Silicone Teether. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Silicone ChildrenS Dinner Plate, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.