Polyester

Background

Air Pressure Eye Massager, air, water, and petroleum. Developed in a 20th-century laboratory,Electric Eye Massager. In this reaction,Eye Massager With Heat.Eye Massager For Dry Eyes.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Professional 4D Massage Chair, computer and recording tapes, and electrical insulation.4D Massage Chair With Footrest. It does not absorb moisture, but does absorb oil;4D Electric Massage Chair-, soil-, and fire-Shiatsu 4D Massage Chair. Its low absorbency also makes it naturally resistant to stains.Automatic 4D Massage Chair,3D Massage Recliner Chair.Heated 3D Massage Chair, and not damaged by mildew.3D Massage Recliner Kneading Chair, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Free Installation 3D Massage Chair-based E.I. du Pont de Nemours and Co.Pu Leather 3D Massage Chair. This early research, headed by W.H. Carothers,3D Back Massage Chair, 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 1946,3D Massage Chair Mechanism. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.3D Office Massage Chair,Vibrating 3D Massage Chair. 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.Reflexology 3D massage chair, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Air Pressure 3D Massage Chair.

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,3D L Track Massage Chair. In this process, ethylene is the polymer, the chemical building block of polyester,3D Airbag Massage Chair.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Calf Kneading 3D Massage Chair. The four basic forms are filament,Percussion 3D Massage Chair, tow, and fiberfill. In the filament form,3D Full Body Massage Chair, producing smooth-Zero Storage 3D Massage Chair.3D Massage Chair, filaments are cut to short,Full Body 2D Massage Chair.S Track 2D Massage Chair. 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.Intelligent Cloud 2D Massage Chair.

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-2D Mechanism Massage Chair,Zero Gravity 2D Massage Chair, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Massage Chair. 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.SFP025SD, which are usually round,SFP024SD. The number of holes in the spinneret determines the size of the yarn,SFP024CD.
• 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,SFP020SD. 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,SFP020CD.
• SFP028SS,SFP024CS. Also,SFP022LSS,SFP022CS.

Winding

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

SFP021SS

SFP018CS, 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,SFP017SS. The rope-SFP015.

Drawing tow

• 1 Newly-SFP003.SFP001.

Crimping

• 2 Drawn tow is then fed into compression boxes,SFT07, at a rate of 9-15 crimps per inch (3-6 per cm).SFT05.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)SFT02.SFR07.

Cutting

• 4 Following heat setting,SF002. 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)SF009.SF008, such ascarpet,polyester filaments are cut into 6 inch (15 cm)SF007.

The Future

SF006-1013,SF005's fastest-growing fiber.Cafe Rod. 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,SF015, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,SF027. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.SF026, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.