Hdpe is known for its high strengthtodensity ratio. General properties 1 qenos technical guides 7 structural differences between the polyethylenes the variations in chemistry between the processes produce important differences in the structure, and consequently the final properties, of the various polyethylenes. In practical terms, this means hdpe pipe shrinks 10 times as much as di and 3 times as. Pe100 pipe is easy to install, light, flexible, corrosionfree and has a service life of up to 100 years.
While the physical properties were studied through density and water. It can be jointed using butt fusion or electrofusion to create a leakfree pressure network for gas or water. Hdpe has a lower modulus of elasticity and higher coefficient of thermal expansion than other pipe materials. Mechanical and chemical properties of high density. Installers prefer it because it goes into the ground quicklythus saving on installation cost. These properties cause hdpe pipe to expand and contract much more from changes in temperature andor pressure than other piping materials. High density polyethylene hdpe refers to polymer with a density between 0. Resins that are produced without comonomer are called homopolymers. Pdf comparison of mechanical properties between pe80 and. Pdf mechanical and physical properties of pp and hdpe. Hdpe is used in a variety of applications and industries where high tensile strength, low moisture absorption and chemical and corrosion resistance properties are required. Hdpe plastic data sheet at curbell plastics high density. In prac tical terms, this means hdpe pipe shrinks 10 times as.
The filler varied from 5% to 25% by weight in the composite. Highdensity polyethylene, as the name suggests, has a higher specific density than lowdensity polyethylene, though this difference is only marginal. Pe is a thermoplastic and, as such, its properties are temperature dependent as well as dependent on the duration of loading. History and physical chemistry of hdpe atoms, and consequently, the greater the molecular weight. Physical chemistry and mechanical properties of hdpe.
Regardless of process type, the chemical process is the same. High density polyethylene hdpe sheet is designed to be used in the manufacturing and food processing industry as it is moisture, stain, and odor resistant. High density polyethylene pipe hdpe intergraph cadworx. Pdf mechanical properties of high density polyethylenemodified. Pdf polyblend films were prepared from highdensity polyethylene hdpe and polyllactic acid plla up to 20% plla by the melt. It is used to make bottles, jugs and other containers used as shortterm storage for milk, detergent and bleach. Hdpe s low rate of degradation is one of the reasons that new alternatives for disposal reduction. The molecular weight, the molecular weight distribution and the amount of branching determine many of the mechanical and chemical properties of the end product. Mechanical properties metric english comments pent 0 hour 0 hour notched tensile.
These properties are presented in tables 1, 2 and 3. Obvious improvement in the mechanical parameters was recorded depending on the filler type and mesh size. Compared to hdpe, it has a higher degree of short and long sidechain branching. It is an enormously versatile polymer which is suited to a wide range of applications from heavyduty damp proof membranes for new buildings to light, flexible bags and films. Product safety assessment high density polyethylene hdpe resins. Properties of hdpe pipe high density polyethylene pipe hdpe has several properties that make it very different from traditional water works pipe materials.
The ldpe is composed of 4,00040,000 carbon atoms, with many short branches. Important information high density polyethylene pipe hdpe has several properties that make it very different from traditional water works pipe materials. The mechanical properties of the new compositemeasured at room temperature, are generally comparable or better than the same properties. Hdpe colorcore features a colored hdpe sheet core, that allows manufacturers to create signs and letters that expose the interior color. For the trenchless applications butt fusion is most widely used because this results in a.
Pdf polyethylene maufacturing and its properties abdul azeem. Coefficient of thermal expansion is over 10 times that of di and steel and 3 times that of pvc. History and physical chemistry of hdpe plastics pipe. Pdf polyethylene maufacturing and its properties abdul. Pdf mechanical and morphological properties of high density. Low density polyethylene ldpe is a semirigid and translucent polymer. Colored high density polyethylene sheet features the same strength and durability features as smooth and matte hdpe. Antiskid hdpe sheet was created specifically for marine applications where a nonslip or. Thermosetting polymers become permanently hard at elevated temperatures and pressures. Hdpe unlike pp cannot withstand normally required autoclaving conditions 8. Florida method of test for determining slow crack growth resistance of hdpe corrugated pipes fm 5572. The absence of branching results in a more closely packed structure with a higher density and somewhat higher chemical resistance than ldpe. For the trenchless applications butt fusion is most widely used because this results in a smooth exterior profile with no.
Mechanical, thermal and crystallization properties of. Material properties specific material properties pe property standard unit pe100 specific density at 23c iso 1183 gcm3 95 melt flow index iso 13 g10min 0,3 mfr 1905 iso18721873 properties of viscoelastic fluids depend on temperature, strain rate and observation time. High density polyethylene sheet hdpe regal plastics. Property standard unit pe100 pe 100 material properties. Astm d5702 mechanical properties hardness, shore d 70 70 astm d2240. The high density polyethylene composite with recycled. Low density polyethylene ldpe high degree of short and long chain branching density 30. The information provided is specifically for burst hoop stress, but you could apply it to bending stress and axial stresses, too, combining for a total stress. Technical and comparative data on petrothene broad molecular. Mechanical properties of high density polyethylenechromium.
High density polyethylene physical properties metric english. Properties and applications of hdpe or high density polyethylene. Properties of hdpe can be further manipulated by the addition of organic or inorganic particles into the polymer matrix. Hdpepp bags manufacturing plant detailed project report. Pdf high density polyethylene hdpecalcium silicate cs composites containing vinyltriethoxysilane treated calcium silicate contents varying from. It is easy to fabricate and weld using thermoplastic welding equipment and is an excellent choice for fabricated water tanks and chemical tanks.
With its chemical resistant properties, hdpe is great for laundry, shampoo, conditioner, household cleaning products, motor oil, antifreeze and recycling bins. Mechanical properties of filled high density polyethylene. Other common polyethylene pe materials are mediumdensity polyethylene mdpe. Physical properties metric english comments density. The strength of these bottles is increased when they. Typical physical properties property hdpe40 thickness 40 mils 1 mm puncture resistance 208 lbs. Highdensity polyethylene is a plastic made from ethane. Mechanical properties of hdpe m624 with three filler inorganic and organic composites were assessed with respect to the effect of the filler content. Effects of microstructure on creep characteristics by joy j. High density polyethylene geomembrane manufactured by gse lining technology inc. See page 5 here for an example of stress versus time to failure for hdpe. Hdpe high density pe is used in products and packaging such as plastic bags, milk jugs, detergent bottles, margarine tubs, garbage containers, water pipes, woven bag, raincoat. Chapter 3 material properties 47 chemical structure, which are reflected in certain differences in properties, such as density, ductility, hardness, etc. Temperature considerations in the hdpe design considerations.
Globally harmonized system of classification and labelling of. Hdpe high density polyethylene is available in sheet and rod for applications that require greater strength and stiffness than ldpe low density polyethylene. Plastic properties of high density polyethylene hdpe a linear polymer, high density polyethylene hdpe is prepared from ethylene by a catalytic process. This is a pdf file of an unedited manuscript that has been accepted for publication. This thermoplastic is available in a range of flexibilities depending on the production process. Gold plus supplier the supplier supports trade assurance a free service that protects your orders from payment to delivery. Mechanical and chemical properties of high density polyethylene.
Hdpe natural pe300pehwst high density polyethylene colour. Engineering properties of polyethylene 5 such is the case with pes resistance to water hammer, which will be discussed in more detail in subsequent sections. Product safety assessment high density polyethylene hdpe. Hdpe high density polyethylene after its experimental preparation in the 1930s, the application in high frequency radar cables during world war ii, gave impetus to its commercial production. I would urge you to check with the supplier in question for specific properties of his pipe material. Costeffective hdpe is a thermoplastic known for its high strengthtodensity ratio. Mechanical properties, including yield stress, relaxation behavior, moduli elastic modulus at the strain of 0. Among the rheological properties, viscosity is one of the most commonly utilized parameters in the study of polymeric material behavior during processing, once the majority of transformation processes occur in shear flows. Hdpe can be translucent or opaque, and the opaque varieties are stronger. Highdensity polyethylene hdpe consists primarily of. Hdpe is easily machined, welded and thermoformed for easy fabrication. The mechanical properties of pp and hdpe were determined using threepoint bending, compression, hardness and impact test. Polyethylene high density hdpe polyethylene polythene is one of the worlds most popular plastics.
Abdul azeemtextile chemical processingntu polyethylene it is a polymer of ethylene, ch2ch2, having the formula ch2ch2n, and is produced at high. High density polyethylene hdpe is a thermoplastic material which is supplied. Mechanical properties value unit dineniso tensile strength at yield 25 mpa 527d638 elongation at yield 9 % 527 modulus of elasticity in tension mpa 527d638 modulus of elasticity in flexure 1400 mpa 178d 790. Consumption of hdpe resin 2007 4 directivesregulations. The density of hdpe can range from 930 to 970 kgm 3. Typical engineering properties of high density polyethylene. Because of these and other properties, great care must be taken in choosing fittings and repair products for use on hdpe pipe. Hdpe is a stable material due to its carboncarbon bonds, causing their slow degradation. Mechanical properties and molecular structures of virgin and.
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