Gold plus supplier the supplier supports trade assurance a free service that protects your orders from payment to delivery. With its chemical resistant properties, hdpe is great for laundry, shampoo, conditioner, household cleaning products, motor oil, antifreeze and recycling bins. Hdpe is known for its large strength to density ratio due to its little branching. 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. 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. Chapter 3 material properties 47 chemical structure, which are reflected in certain differences in properties, such as density, ductility, hardness, etc. Plastic properties of high density polyethylene hdpe a linear polymer, high density polyethylene hdpe is prepared from ethylene by a catalytic process.
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. Typical engineering properties of high density polyethylene. Hdpe can be translucent or opaque, and the opaque varieties are stronger. Hdpe is uv resistant which helps keep the toys resistant to the rays damaging and discoloring effects. Mechanical properties of high density polyethylenechromium. Polyethylene high density hdpe polyethylene polythene is one of the worlds most popular plastics. The high density polyethylene composite with recycled. Important information high density polyethylene pipe hdpe has several properties that make it very different from traditional water works pipe materials. Low density polyethylene ldpe high degree of short and long chain branching density 30. Property standard unit pe100 pe 100 material properties. Regardless of process type, the chemical process is the same.
Costeffective hdpe is a thermoplastic known for its high strengthtodensity ratio. Globally harmonized system of classification and labelling of. High density polyethylene physical properties metric english comments specific gravity 0. That makes it easy to load, easy to transport, and easy to handle. Hdpe s low rate of degradation is one of the reasons that new alternatives for disposal reduction. Hdpes low rate of degradation is one of the reasons that new alternatives for disposal reduction. Antiskid hdpe sheet was created specifically for marine applications where a nonslip or. 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. Other common polyethylene pe materials are mediumdensity polyethylene mdpe. These properties are presented in tables 1, 2 and 3. I would urge you to check with the supplier in question for specific properties of his pipe material. 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.
Typical physical properties property hdpe40 thickness 40 mils 1 mm puncture resistance 208 lbs. Hdpe natural pe300pehwst high density polyethylene colour. Mechanical properties and molecular structures of virgin and. For the trenchless applications butt fusion is most widely used because this results in a. Highdensity polyethylene hdpe consists primarily of.
It is easy to fabricate and weld using thermoplastic welding equipment and is an excellent choice for fabricated water tanks and chemical tanks. Astm d4883 environmental stress crack resistance 5000 hour 5000 hour condition c. Physical properties of polymers a thermoplastic polymer is one that can be softened by heating and then formed into desired shapes by applying pressure. Pdf polyblend films were prepared from highdensity polyethylene hdpe and polyllactic acid plla up to 20% plla by the melt. High density polyethylene hdpe refers to polymer with a density between 0. Pdf mechanical and morphological properties of high density. Properties of hdpe can be further manipulated by the addition of organic or inorganic particles into the polymer matrix. Pdf comparison of mechanical properties between pe80 and. Temperature considerations in the hdpe design considerations. Low density polyethylene ldpe is a semirigid and translucent polymer. The filler varied from 5% to 25% by weight in the composite. For the trenchless applications butt fusion is most widely used because this results in a smooth exterior profile with no. Properties and applications of hdpe or high density polyethylene.
This is a pdf file of an unedited manuscript that has been accepted for publication. High density polyethylene physical properties metric english. Hdpe is known for its high strengthtodensity ratio. Installers prefer it because it goes into the ground quicklythus saving on installation cost. High density polyethylene geomembrane manufactured by gse lining technology inc. Physical chemistry and mechanical properties of hdpe. High density polyethylene sheet hdpe regal plastics. 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. History and physical chemistry of hdpe plastics pipe.
In prac tical terms, this means hdpe pipe shrinks 10 times as. Pdf mechanical properties of high density polyethylenemodified. 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. 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. Resins that are produced without comonomer are called homopolymers.
Pdf high density polyethylene hdpecalcium silicate cs composites containing vinyltriethoxysilane treated calcium silicate contents varying from. Pe100 pipe is easy to install, light, flexible, corrosionfree and has a service life of up to 100 years. This thermoplastic is available in a range of flexibilities depending on the production process. Mechanical, thermal and crystallization properties of. Physical properties metric english comments density. 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. Pdf polyethylene maufacturing and its properties abdul azeem. Highdensity polyethylene, as the name suggests, has a higher specific density than lowdensity polyethylene, though this difference is only marginal. High density polyethylene pipe hdpe intergraph cadworx. Colored high density polyethylene sheet features the same strength and durability features as smooth and matte hdpe. Florida method of test for determining slow crack growth resistance of hdpe corrugated pipes fm 5572.
Thermosetting polymers become permanently hard at elevated temperatures and pressures. Hdpe high density polyethylene is available in sheet and rod for applications that require greater strength and stiffness than ldpe low density polyethylene. Astm d5702 mechanical properties hardness, shore d 70 70 astm d2240. The molecular weight, the molecular weight distribution and the amount of branching determine many of the mechanical and chemical properties of the end product. See page 5 here for an example of stress versus time to failure for hdpe. Mechanical and chemical properties of high density polyethylene. Effects of microstructure on creep characteristics by joy j. Obvious improvement in the mechanical parameters was recorded depending on the filler type and mesh size. Pe is a thermoplastic and, as such, its properties are temperature dependent as well as dependent on the duration of loading. Hdpe colorcore features a colored hdpe sheet core, that allows manufacturers to create signs and letters that expose the interior color. Hdpe is easily machined, welded and thermoformed for easy fabrication. Pdf polyethylene maufacturing and its properties abdul. Mechanical properties of filled high density polyethylene. The mechanical properties of pp and hdpe were determined using threepoint bending, compression, hardness and impact test.
It can be jointed using butt fusion or electrofusion to create a leakfree pressure network for gas or water. Product safety assessment high density polyethylene hdpe resins. Mechanical properties metric english comments pent 0 hour 0 hour notched tensile. Hdpepp bags manufacturing plant detailed project report. Properties of hdpe pipe high density polyethylene pipe hdpe has several properties that make it very different from traditional water works pipe materials. Mechanical properties of hdpe m624 with three filler inorganic and organic composites were assessed with respect to the effect of the filler content. 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. The density of hdpe can range from 930 to 970 kgm 3. The absence of branching results in a more closely packed structure with a higher density and somewhat higher chemical resistance than ldpe. Mechanical and chemical properties of high density. Consumption of hdpe resin 2007 4 directivesregulations.
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. The different branching structures for ldpe, lldpe and hdpe are illustrated in figure 2. Coefficient of thermal expansion is over 10 times that of di and steel and 3 times that of pvc. It is used to make bottles, jugs and other containers used as shortterm storage for milk, detergent and bleach. These properties cause hdpe pipe to expand and contract much more from changes in temperature andor pressure than other piping materials. Hdpe is a stable material due to its carboncarbon bonds, causing their slow degradation. Abdul azeemtextile chemical processingntu polyethylene it is a polymer of ethylene, ch2ch2, having the formula ch2ch2n, and is produced at high. Pdf mechanical and physical properties of pp and hdpe. In practical terms, this means hdpe pipe shrinks 10 times as much as di and 3 times as. High density polyethylene hdpe is a thermoplastic material which is supplied. 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. History and physical chemistry of hdpe atoms, and consequently, the greater the molecular weight. Mechanical properties, including yield stress, relaxation behavior, moduli elastic modulus at the strain of 0. Hdpe unlike pp cannot withstand normally required autoclaving conditions 8.
While the physical properties were studied through density and water. Highdensity polyethylene is a plastic made from ethane. The ldpe is composed of 4,00040,000 carbon atoms, with many short branches. Table 1 lists the melt index and density of ga 818073 and other polyethylene types, including conventional nmwllpde, autoclave ldpe and hdpe. 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. Hdpe has a lower modulus of elasticity and higher coefficient of thermal expansion than other pipe materials. 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. Technical and comparative data on petrothene broad molecular. Hdpe plastic data sheet at curbell plastics high density.
26 1282 303 794 85 1436 1357 1407 260 1596 200 512 823 1181 1164 916 662 1395 1313 644 261 164 363 389 285 264 988 46 97 198 938 282 1566 291 460 406 179 747 1482 1151 1016 1080 587