Polyester

Background

Large Flexivity Expansion Joint, air, water, and petroleum. Developed in a 20th-century laboratory,Couplings joint. In this reaction,gland type limited expansion joint.single flange dismantling joint.

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

History

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

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,Double Card Injection Moulding Name Badge. In this process, ethylene is the polymer, the chemical building block of polyester,PS Injection Moulding Name Badge.

The Manufacturing
Process

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

Drying

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

PP Pencil Case

Multicolor Plastic Pencil 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,Printable Plastic Pencil Case. The rope-Solid Color PP Pen Case.

Drawing tow

• 1 Newly-PP Pen Case With Logo.Plastic Pen Case.

Crimping

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

Setting

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

Cutting

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

The Future

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