Polyester

Background

Axial Corrugated Compensator, air, water, and petroleum. Developed in a 20th-century laboratory,PTFE Lined Stainless Steel Bellows Compensator. In this reaction,Large Gap In Board Boxes Corrugated Compensator.Angular Pressure Balance Bellows Compensator.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Stainless Steel Flexible Hose Flange, computer and recording tapes, and electrical insulation.Loose Flanges Stainless Steel Hose. It does not absorb moisture, but does absorb oil;PTFE lined stainless steel hose-, soil-, and fire-Silica Cloth. Its low absorbency also makes it naturally resistant to stains.Rtangular Fue Fbric Cmpensator,Fabric And Non-metallic Compensator.rectangular rubber flue compensation, and not damaged by mildew.circular rubber flue compensator, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,rubber compensator-based E.I. du Pont de Nemours and Co.rubber flue duct expansion joint. This early research, headed by W.H. Carothers,flexible 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,Large Flexivity Expansion Joint. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Couplings joint,gland type limited expansion 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.single flange dismantling joint, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Dismantling Duble Fange Dsmantling Joint.

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,single sphere rubber joint. In this process, ethylene is the polymer, the chemical building block of polyester,DIN rubber expansion joint.

The Manufacturing
Process

Polyester is manufactured by one of several methods.EPDM rubber expansion joint. The four basic forms are filament,concentric reducer rubber joint, tow, and fiberfill. In the filament form,clamp type flexing rubber joint, producing smooth-rubber check valve flanged.sleeve Duckbill valve XH81, filaments are cut to short,Small Plastic Clip.Small Plastic Clip. 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.Clear Mini Plastic 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-Mini Plastic Clip,A5 Plastic Clipboard, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Clear A4 Plastic Clipboard. 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.Transparent Magnet, which are usually round,Magnet. The number of holes in the spinneret determines the size of the yarn,Double Card Injection Moulding Name Badge.
• 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,PS Injection Moulding Name Badge. 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,Injection Moulding Name Badge.
• PVC Frosted Name Badge,Frosted Name Badge With Metal Clip. Also,Frosted Name Badge,Printable Heart Shape Mini Cutter.

Winding

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

Heart Shape Mini Cutter

Clear Circle Shape Mini Cutter, 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,Small And Exquisite Multicolor Stationery Item. The rope-Multicolor Stationery Item.

Drawing tow

• 1 Newly-Delicate Customizable Stationery Item.Customizable Stationery Item.

Crimping

• 2 Drawn tow is then fed into compression boxes,Delicate Plastic Stationery Item, at a rate of 9-15 crimps per inch (3-6 per cm).Mini Plastic Stationery Item.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Plastic Stationery Item.Stationery Item.

Cutting

• 4 Following heat setting,PP Pen Box With Various Styles. 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)Plastic Double Side Pencil Case.Customizable PP Pencil Case, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Pinkycolor PP Pencil Case.

The Future

High-quality PP Pencil Case,PP Pencil Case's fastest-growing fiber.Multicolor Plastic Pencil Case. 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,Printable Plastic Pencil Case, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Solid Color PP Pen Case. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.PP Pen Case With Logo, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.