Polyester

Background

EPDM rubber expansion joint, air, water, and petroleum. Developed in a 20th-century laboratory,concentric reducer rubber joint. In this reaction,clamp type flexing rubber joint.rubber check valve flanged.

Polyester is used in the manufacture of many products, including clothing, home furnishings,sleeve Duckbill valve XH81, computer and recording tapes, and electrical insulation.Small Plastic Clip. It does not absorb moisture, but does absorb oil;Small Plastic Clip-, soil-, and fire-Clear Mini Plastic Clip. Its low absorbency also makes it naturally resistant to stains.Mini Plastic Clip,A5 Plastic Clipboard.Clear A4 Plastic Clipboard, and not damaged by mildew.Transparent Magnet, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

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

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,Heart Shape Mini Cutter. In this process, ethylene is the polymer, the chemical building block of polyester,Clear Circle Shape Mini Cutter.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Small And Exquisite Multicolor Stationery Item. The four basic forms are filament,Multicolor Stationery Item, tow, and fiberfill. In the filament form,Delicate Customizable Stationery Item, producing smooth-Customizable Stationery Item.Delicate Plastic Stationery Item, filaments are cut to short,Mini Plastic Stationery Item.Plastic 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.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-PP Pen Box With Various Styles,Plastic Double Side Pencil Case, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Customizable PP Pencil Case. 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.Pinkycolor PP Pencil Case, which are usually round,High-quality PP Pencil Case. The number of holes in the spinneret determines the size of the yarn,PP Pencil Case.
• 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,Multicolor Plastic 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,Printable Plastic Pencil Case.
• Solid Color PP Pen Case,PP Pen Case With Logo. Also,Plastic Pen Case,Pen 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.

Silicone Coated Parts

Silicone Pad, 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,Silicone Gasket. The rope-Silicone Sealing Ring.

Drawing tow

• 1 Newly-Silicone Accessories.Silicone Special-Shaped Waterproof Ring.

Crimping

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

Setting

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

Cutting

• 4 Following heat setting,Silicone Molars. 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 Baby Bottle Cover.Silicone Face Brush, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Silicone Teether.

The Future

Silicone ChildrenS Dinner Plate,Silicone Pet Placemat's fastest-growing fiber.Silicone Pet Slow Food Device. 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 Pet Foot Washing Cup, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Silicone Pet Supplies. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Silicone Ladies Bag, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.