It can be jointed using butt fusion or electrofusion to create a leakfree pressure network for gas or water. I would urge you to check with the supplier in question for specific properties of his pipe material. 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. Astm d4883 environmental stress crack resistance 5000 hour 5000 hour condition c. Hdpe natural pe300pehwst high density polyethylene colour. Abdul azeemtextile chemical processingntu polyethylene it is a polymer of ethylene, ch2ch2, having the formula ch2ch2n, and is produced at high. The different branching structures for ldpe, lldpe and hdpe are illustrated in figure 2. Hdpe plastic data sheet at curbell plastics high density. Hdpe is easily machined, welded and thermoformed for easy fabrication. Hdpe is known for its large strength to density ratio due to its little branching. These properties are presented in tables 1, 2 and 3.
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. This thermoplastic is available in a range of flexibilities depending on the production process. Because of these and other properties, great care must be taken in choosing fittings and repair products for use on hdpe pipe. With its chemical resistant properties, hdpe is great for laundry, shampoo, conditioner, household cleaning products, motor oil, antifreeze and recycling bins. High density polyethylene physical properties metric english. Globally harmonized system of classification and labelling of.
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. Pdf high density polyethylene hdpecalcium silicate cs composites containing vinyltriethoxysilane treated calcium silicate contents varying from. Mechanical and chemical properties of high density polyethylene. Mechanical, thermal and crystallization properties of.
Obvious improvement in the mechanical parameters was recorded depending on the filler type and mesh size. Astm d5702 mechanical properties hardness, shore d 70 70 astm d2240. Mechanical properties, including yield stress, relaxation behavior, moduli elastic modulus at the strain of 0. Gold plus supplier the supplier supports trade assurance a free service that protects your orders from payment to delivery. Costeffective hdpe is a thermoplastic known for its high strengthtodensity ratio. 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. Installers prefer it because it goes into the ground quicklythus saving on installation cost.
The density of hdpe can range from 930 to 970 kgm 3. Thermosetting polymers become permanently hard at elevated temperatures and pressures. Highdensity polyethylene is a plastic made from ethane. It is easy to fabricate and weld using thermoplastic welding equipment and is an excellent choice for fabricated water tanks and chemical tanks. Typical physical properties property hdpe40 thickness 40 mils 1 mm puncture resistance 208 lbs. 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. Physical chemistry and mechanical properties of hdpe. In practical terms, this means hdpe pipe shrinks 10 times as much as di and 3 times as.
Physical properties of polymers a thermoplastic polymer is one that can be softened by heating and then formed into desired shapes by applying pressure. For the trenchless applications butt fusion is most widely used because this results in a smooth exterior profile with no. Product safety assessment high density polyethylene hdpe resins. The high density polyethylene composite with recycled. Antiskid hdpe sheet was created specifically for marine applications where a nonslip or. Typical engineering properties of high density polyethylene. For the trenchless applications butt fusion is most widely used because this results in a. Hdpe has a lower modulus of elasticity and higher coefficient of thermal expansion than other pipe materials. Mechanical properties of high density polyethylenechromium.
Mechanical properties and molecular structures of virgin and. Mechanical properties metric english comments pent 0 hour 0 hour notched tensile. Pdf polyblend films were prepared from highdensity polyethylene hdpe and polyllactic acid plla up to 20% plla by the melt. This is a pdf file of an unedited manuscript that has been accepted for publication. The molecular weight, the molecular weight distribution and the amount of branching determine many of the mechanical and chemical properties of the end product. Plastic properties of high density polyethylene hdpe a linear polymer, high density polyethylene hdpe is prepared from ethylene by a catalytic process. Pdf mechanical and morphological properties of high density.
High density polyethylene physical properties metric english comments specific gravity 0. Pdf comparison of mechanical properties between pe80 and. Low density polyethylene ldpe high degree of short and long chain branching density 30. Resins that are produced without comonomer are called homopolymers. High density polyethylene sheet hdpe regal plastics.
Hdpe is known for its high strengthtodensity ratio. The strength of these bottles is increased when they. 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. Hdpepp bags manufacturing plant detailed project report. Property standard unit pe100 pe 100 material properties. Properties of hdpe can be further manipulated by the addition of organic or inorganic particles into the polymer matrix. That makes it easy to load, easy to transport, and easy to handle. The absence of branching results in a more closely packed structure with a higher density and somewhat higher chemical resistance than ldpe. High density polyethylene hdpe refers to polymer with a density between 0. The ldpe is composed of 4,00040,000 carbon atoms, with many short branches. Jul 25, 2012 highdensity polyethylene, usually shortened to hdpe or pehd, is a plastic polymer with flexible properties that make it ideal for a wide range of applications. Mechanical and chemical properties of high density. Florida method of test for determining slow crack growth resistance of hdpe corrugated pipes fm 5572. Product safety assessment high density polyethylene hdpe.
Hdpe can be translucent or opaque, and the opaque varieties are stronger. In prac tical terms, this means hdpe pipe shrinks 10 times as. Mechanical properties of hdpe m624 with three filler inorganic and organic composites were assessed with respect to the effect of the filler content. Physical properties metric english comments density. Low density polyethylene ldpe is a semirigid and translucent polymer. Other common polyethylene pe materials are mediumdensity polyethylene mdpe.
Pdf mechanical and physical properties of pp and hdpe. Important information high density polyethylene pipe hdpe has several properties that make it very different from traditional water works pipe materials. Temperature considerations in the hdpe design considerations. It is used to make bottles, jugs and other containers used as shortterm storage for milk, detergent and bleach. Properties of hdpe pipe high density polyethylene pipe hdpe has several properties that make it very different from traditional water works pipe materials. See page 5 here for an example of stress versus time to failure for hdpe. Hdpes low rate of degradation is one of the reasons that new alternatives for disposal reduction. Pe is a thermoplastic and, as such, its properties are temperature dependent as well as dependent on the duration of loading. Properties and applications of hdpe or high density polyethylene. Pdf polyethylene maufacturing and its properties abdul azeem.
The mechanical properties of pp and hdpe were determined using threepoint bending, compression, hardness and impact test. Highdensity polyethylene, as the name suggests, has a higher specific density than lowdensity polyethylene, though this difference is only marginal. Hdpe is uv resistant which helps keep the toys resistant to the rays damaging and discoloring effects. Table 1 lists the melt index and density of ga 818073 and other polyethylene types, including conventional nmwllpde, autoclave ldpe and hdpe. Consumption of hdpe resin 2007 4 directivesregulations. These properties cause hdpe pipe to expand and contract much more from changes in temperature andor pressure than other piping materials. Polyethylene high density hdpe polyethylene polythene is one of the worlds most popular plastics. High density polyethylene pipe hdpe intergraph cadworx. Hdpe colorcore features a colored hdpe sheet core, that allows manufacturers to create signs and letters that expose the interior color. Hdpe unlike pp cannot withstand normally required autoclaving conditions 8. Technical and comparative data on petrothene broad molecular. History and physical chemistry of hdpe atoms, and consequently, the greater the molecular weight.
While the physical properties were studied through density and water. Although the density of hdpe is only marginally higher than that of lowdensity polyethylene, hdpe has little branching, giving it stronger intermolecular forces and tensile strength than ldpe. Hdpe is a stable material due to its carboncarbon bonds, causing their slow degradation. February 26, 2014 the dow chemical company page of 7 blow molding resellers, 32% compounders, distributors 19% injection molding 16% film 14%14% pipe, conduit sheet 4% wire, cable 1% u. Hdpe s low rate of degradation is one of the reasons that new alternatives for disposal reduction. Colored high density polyethylene sheet features the same strength and durability features as smooth and matte hdpe. 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. 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.
The filler varied from 5% to 25% by weight in the composite. Coefficient of thermal expansion is over 10 times that of di and steel and 3 times that of pvc. Chapter 3 material properties 47 chemical structure, which are reflected in certain differences in properties, such as density, ductility, hardness, etc. Highdensity polyethylene hdpe consists primarily of. High density polyethylene geomembrane manufactured by gse lining technology inc.
Effects of microstructure on creep characteristics by joy j. Regardless of process type, the chemical process is the same. History and physical chemistry of hdpe plastics pipe. Pdf polyethylene maufacturing and its properties abdul. 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. Pdf mechanical properties of high density polyethylenemodified. High density polyethylene hdpe is a thermoplastic material which is supplied.
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