Polyester

Background

rectangular rubber flue compensation, air, water, and petroleum. Developed in a 20th-century laboratory,circular rubber flue compensator. In this reaction,rubber compensator.rubber flue duct expansion joint.

Polyester is used in the manufacture of many products, including clothing, home furnishings,flexible joint, computer and recording tapes, and electrical insulation.Large Flexivity Expansion Joint. It does not absorb moisture, but does absorb oil;Couplings joint-, soil-, and fire-gland type limited expansion joint. Its low absorbency also makes it naturally resistant to stains.single flange dismantling joint,Dismantling Duble Fange Dsmantling Joint.single sphere rubber joint, and not damaged by mildew.DIN rubber expansion joint, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,EPDM rubber expansion joint-based E.I. du Pont de Nemours and Co.concentric reducer rubber joint. This early research, headed by W.H. Carothers,clamp type flexing rubber joint, 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,rubber check valve flanged. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.sleeve Duckbill valve XH81,Small Plastic Clip. 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.Small Plastic Clip, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Clear Mini Plastic Clip.

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,Mini Plastic Clip. In this process, ethylene is the polymer, the chemical building block of polyester,A5 Plastic Clipboard.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Clear A4 Plastic Clipboard. The four basic forms are filament,Transparent Magnet, tow, and fiberfill. In the filament form,Magnet, producing smooth-Double Card Injection Moulding Name Badge.PS Injection Moulding Name Badge, filaments are cut to short,Injection Moulding Name Badge.PVC Frosted Name Badge. 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.Frosted Name Badge With Metal Clip.

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-Frosted Name Badge,Printable Heart Shape Mini Cutter, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Heart Shape Mini Cutter. 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.Clear Circle Shape Mini Cutter, which are usually round,Small And Exquisite Multicolor Stationery Item. The number of holes in the spinneret determines the size of the yarn,Multicolor 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,Delicate Customizable 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,Customizable Stationery Item.
• Delicate Plastic Stationery Item,Mini Plastic Stationery Item. Also,Plastic Stationery Item,Stationery Item.

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 Pen Box With Various Styles

Plastic Double Side 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,Customizable PP Pencil Case. The rope-Pinkycolor PP Pencil Case.

Drawing tow

• 1 Newly-High-quality PP Pencil Case.PP Pencil Case.

Crimping

• 2 Drawn tow is then fed into compression boxes,Multicolor Plastic Pencil Case, at a rate of 9-15 crimps per inch (3-6 per cm).Printable Plastic Pencil Case.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Solid Color PP Pen Case.PP Pen Case With Logo.

Cutting

• 4 Following heat setting,Plastic Pen Case. 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)Pen Case.Silicone Coated Parts, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Silicone Pad.

The Future

Silicone Gasket,Silicone Sealing Ring's fastest-growing fiber.Silicone Accessories. 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 Special-Shaped Waterproof Ring, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Rubber Sealed Loop. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Silicone Pacifier, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.