Polyester

Background

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

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

History

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.concentric reducer rubber joint. The four basic forms are filament,clamp type flexing rubber joint, tow, and fiberfill. In the filament form,rubber check valve flanged, producing smooth-sleeve Duckbill valve XH81.Small Plastic Clip, filaments are cut to short,Small Plastic Clip.Clear Mini 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.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-A5 Plastic Clipboard,Clear A4 Plastic Clipboard, is extruded through a slot to form long ribbons.

Drying

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

Clear Circle Shape Mini Cutter

Small And Exquisite Multicolor 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,Multicolor Stationery Item. The rope-Delicate Customizable Stationery Item.

Drawing tow

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

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Stationery Item.PP Pen Box With Various Styles.

Cutting

• 4 Following heat setting,Plastic Double Side 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)Customizable PP Pencil Case.Pinkycolor PP Pencil Case, such ascarpet,polyester filaments are cut into 6 inch (15 cm)High-quality PP Pencil Case.

The Future

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