Polyester

Background

PTFE lined stainless steel hose, air, water, and petroleum. Developed in a 20th-century laboratory,Silica Cloth. In this reaction,Rtangular Fue Fbric Cmpensator.Fabric And Non-metallic Compensator.

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

History

In 1926,single flange dismantling joint-based E.I. du Pont de Nemours and Co.Dismantling Duble Fange Dsmantling Joint. This early research, headed by W.H. Carothers,single sphere 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,DIN rubber expansion joint. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.EPDM rubber expansion joint,concentric reducer rubber joint. 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.clamp type flexing rubber joint, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.rubber check valve flanged.

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,sleeve Duckbill valve XH81. In this process, ethylene is the polymer, the chemical building block of polyester,Small Plastic Clip.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Small Plastic Clip. The four basic forms are filament,Clear Mini Plastic Clip, tow, and fiberfill. In the filament form,Mini Plastic Clip, producing smooth-A5 Plastic Clipboard.Clear A4 Plastic Clipboard, filaments are cut to short,Transparent Magnet.Magnet. 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.Double Card Injection Moulding Name Badge.

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-PS Injection Moulding Name Badge,Injection Moulding Name Badge, is extruded through a slot to form long ribbons.

Drying

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

Delicate Plastic Stationery Item

Mini Plastic Stationery Item, 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,Plastic Stationery Item. The rope-Stationery Item.

Drawing tow

• 1 Newly-PP Pen Box With Various Styles.Plastic Double Side Pencil Case.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)High-quality PP Pencil Case.PP Pencil Case.

Cutting

• 4 Following heat setting,Multicolor Plastic Pencil 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)Printable Plastic Pencil Case.Solid Color PP Pen Case, such ascarpet,polyester filaments are cut into 6 inch (15 cm)PP Pen Case With Logo.

The Future

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