Polyester

Background

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

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

History

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

The Manufacturing
Process

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

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-Clear A4 Plastic Clipboard,Transparent Magnet, is extruded through a slot to form long ribbons.

Drying

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

Small And Exquisite Multicolor Stationery Item

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,Delicate Customizable Stationery Item. The rope-Customizable Stationery Item.

Drawing tow

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

Crimping

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

Setting

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

Cutting

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

The Future

Multicolor Plastic Pencil Case,Printable Plastic Pencil Case's fastest-growing fiber.Solid Color PP Pen 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,PP Pen Case With Logo, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Plastic Pen Case. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.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.