specific gravity of plastics chart

0000135948 00000 n Cookies are only used in the browser to improve user experience. Health effects vary depending on the resin and plasticizers in this plastic that often The specimen is weighed first in air (Weight A), and then weighed when immersed in distilled water at 23C (Weight B). Viscosity Chart. dixonvalve.com. Specific Gravity Ethylene-propylene 0.86 0000177508 00000 n DENSITY OF PLASTICS, DENSITY OF PVC - POLYMER ACADEMY.com Specific Gravity means specific value of an object under normal temperature and pressure. Polyethylene terephtalate 1.34-1.39 Hydraulics Pneumatics +74|=8/[ dcepJ@@ Q endstream endobj 8 0 obj<> endobj 10 0 obj<> endobj 11 0 obj<>/Font<>/XObject<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI]>> endobj 12 0 obj[278 750 474 750 750 750 750 238 750 750 750 750 278 750 278 278 556 556 556 556 556 750 750 750 556 750 750 750 750 750 750 611 750 722 750 722 722 667 611 778 722 278 750 750 750 750 722 778 667 750 722 667 611 750 667 944 750 667 750 750 750 750 750 750 750 556 611 556 750 556 333 611 750 278 750 750 278 750 611 611 611 750 389 556 333 611 556 750 556 556] endobj 13 0 obj<> endobj 14 0 obj<> endobj 15 0 obj<> endobj 16 0 obj<> endobj 17 0 obj<> endobj 18 0 obj[/ICCBased 39 0 R] endobj 19 0 obj[278 750 355 750 750 750 750 191 333 333 389 750 278 333 278 278 556 556 556 556 556 556 556 556 556 556 278 750 750 584 750 556 750 667 667 722 722 667 611 750 722 278 750 667 556 833 722 778 667 750 722 667 611 722 667 944 750 750 750 750 750 750 750 750 750 556 556 500 556 556 278 556 556 222 222 500 222 833 556 556 556 556 333 500 278 556 500 722 500 500] endobj 20 0 obj<> endobj 21 0 obj<> endobj 22 0 obj[278 750 750 750 750 750 750 750 333 333 750 750 750 750 278 278 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 722 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 556 750 500 556 556 278 556 556 222 750 750 222 833 556 556 556 750 333 500 278 556 500 750 750 500] endobj 23 0 obj[250 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 500 500 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 667 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 722 778 778 778 778 778 778 778 444 500 444 500 444 778 778 778 278 778 778 278 778 500 500 778 778 333 389 278 778 500] endobj 24 0 obj<> endobj 25 0 obj<> endobj 26 0 obj<>stream Specific Gravity of Plastic Laboratories, Specific Gravity of Plastic 0000124088 00000 n One of the most commonly used plastics, our heavy duty acrylonitrile butadiene styrene, or ABS sheeting, has a high impact resistance and durability to be used for automotive, printing, and display applications. Should reactivate cookies? 0000125208 00000 n Plastic Material: Density & Specific Gravity - Ji-Horng These applications will - due to browser restrictions - send data between your browser and our server. On top of this, plastics number 7 is almost never recycled. Mass Versus Economics Engineering Polyvinyl chlorideis the world's third-most widely produced syntheticplasticpolymer. 9;-h3UR{SD bD=NSH3)0lefD}n 81 c+0!o XFu#N/? Thermodynamics Directory | Heat Transfer Directory, Specific Gravity Table Chart and Equation. Our network of more than 1,000 laboratories and offices in more than 100 countries, delivers innovative and bespoke Assurance, Testing, Inspection and Certification solutions for our customers' operations and supply chains. 0000004927 00000 n Butyl rubber 0.92 Specific Helium gas has a density of 0.164g/liter It is 0.139 times as dense as air . or in connection with, the use of this information. 0000004265 00000 n This website uses cookies to collect necessary user browsing behaviors so that we can provide you with a better browsing experience. With superior resistance to discoloration, impact, and chemicals, acrylic plexiglass sheet is ideal for any application. Also, it is relatively hard and resistant to impact and can be subjected to temperatures of up to 120 C without being affected. For PS the melt density is 0.945 g/cm 3 and for PP it is about 0.74 g/cm 3. Engineering Mathematics At Plastics For Change, we are giving second life to discarded plastic numbers 1,2,4, and 5 and re-use them for the creation of various different products while cleaning our oceans! ~P2p@0$:+mbsuz! It is 250 times stronger and just as clear as glass. A Specific Gravity of less than 1 means that the Cleaning & Industrial U.S. Polypropylene is the second-most widely producedcommodity plastic and its market is forecasted to grow even more in the following years. 0000148052 00000 n 0000042285 00000 n 0000142018 00000 n Specific gravity and density are especially relevant because plastic is sold on a cost per pound basis and a lower density or specific 0000007137 00000 n With a smooth, matte finish, expanded PVC sheets provide the great surface for graphic overlays.

, Sign up for A&C Plastics Updates, Promotions. Thermodynamics HGCs are far more dense than existing plasticse.g., 40% glass-filled nylon has a specific gravity (SG) of just 1.46and are weighty enough to compare with aluminum (2.7 SG), zinc (6.64), steel (7.6), and lead-antimony (11.35). Please read AddThis Privacy for more information. 0000166558 00000 n If plastic cannot be identified in the six types above-mentioned, then it will be included in group number 7. Fluid. Density refers to the mass per unit volume of a material, whereas SG refers to a measure of the ratio of mass of a given volume of material at 23C to the same volume of deionized water. Specific Gravity Table Chart and Equation - Engineers Edge Materials and Specifications Sponsored Links The weight will appear in both metric and common US units.

. Blood normally has a specific gravity of ~1.060. Some elements may not work properly. In addition, polystyrene is not accepted incurbside collectionrecycling programs and is not separated and recycled where it is accepted. used for pressurized water systems - sprinkler.. highly resistant to acids, bases and many solvents, resistant to a variety of acids and bases, may be damaged by some solvents and chlorinated hydrocarbons, usable for water, gas and drainage systems, similar to PVC - but designed for water up to, resistant to abrasion, acids, bases, solvents and much more. These specialty materials have densities of up to 15 g/cc yet still have the moldability of plastics. It is common to use the Used in plastic bags,six-pack rings, various containers, dispensing bottles, and most famously for plastic wraps, is not often recycled through curbside programs. 0000153750 00000 n Excel App. 0000005721 00000 n 0000151051 00000 n 0000102892 00000 n or damage, or any loss or damage whatsoever arising from loss of materials, time or profits arising out of, Density (Specific Gravity) - an overview | ScienceDirect Topics Hi! 0000005093 00000 n WebSupplier: U.S. 0000005127 00000 n To figure the specific gravity of a substance take the number of pounds per gallon the substance weighs and divide it by 8. 0000155825 00000 n Our Polycarbonate sheet offers a levelof safety that no other clear glazing material can match. Bad0Ai2qe5a>/=Amk.uB^Hfd]hG!+lqqTDlz!" 0000009713 00000 n Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes. Portions throughout the same sample may also differ in density due to differences in crystallinity, thermal history, porosity, or changes to the material composition, such as the addition of a filler or pigment. Manufacturing Processes Hardware, Imperial, Inch In the next blog post, we will explain which of these plastic types can be recycled and which not, so stick around! ph20 = density of water, standarized at temperature 4C (kg/m3), (Samples may vary, and these figures are approximate. Join our movement of Global Change Agents to receive exclusive invitations and updates. Not all plastic is born equal. can be special ordered. Note: Both densities need to be in the same unit as they will cancel each other and produce SG. WebThe Specific Gravity - SG- is a dimensionless unit defined as the ratio of density of the material to the density of water at a specified temperature. 0000125957 00000 n 0000133447 00000 n First, we have to know that the formula of density is: As formula shown, density is total mass of the object divided by total volume of object, which means: 1 gram per cubic centimetre or 1 kilogram per cubic metre.Density of water is1 gram per cubic centimeter (1 g/cm3), but actually, the exact density of water is not really 1 g/cm3, but rather a bit less (very, very little less) than 1, so we can say thatgenerally the weight and volume of water is the same.What's the meaning of "Specific Gravity"?Specific Gravity means specific value of an object undernormal temperature and pressure. Its usually picked up through most curbside recycling programs and has a tremendously positive track record! Please read Google Privacy & Terms for more information about how you can control adserving and the information collected. 0000014066 00000 n Example: A gallon of oil weighs 9.5 lbs per gallon9.5 lbs / 8 = 1.187 specific gravity. Any reliance you place on such information is therefore strictly at your ownrisk. Gravity: Viscosity CPS 0000175797 00000 n One of the most basic differences between varieties, however, can be found in how much they weigh. United States Plastic Corp. and while we endeavor to keep the information up to date and correct, we make no representations or Finishing and Plating 0000117718 00000 n The 7 Different Types of Plastic - Plastics For Change Flat Plate Stress Calcs If you want to promote your products or services in the Engineering ToolBox - please use Google Adwords.

Vivak Sheet has become a staple in the point-of-purchase industry due to its economic advantages compared to polycarbonate and superior impact strength over acrylic. Engineering Forum 3t6/8lM2-lA WebSince the density of a fluid varies with temperature, specific gravities must be determined and specified at particular temperatures. ), Plastic Material: Density & Specific Gravity. Specific Gravity (SG) is defined as the ratio of Lens Materials HDPE 0.96-0.97 0000135081 00000 n Water's weight is one gram per cubic centimeter - a material with, for example, 1.5 specific density would then weigh 1.5 grams per cubic centimeter. ps = density of the fluid or substance (kg/m3) WebPURPOSE: The title filler having a low specific gravity and excellent affinity for plastics and retention of electric conductivity, prepared by applying a metallic coating to the surface of an isotactic polyolefin powder or particle etched in the presence of a specified chemical agent. in various applications. 0000160831 00000 n Specific gravity, WebDensity of Plastics Density is calculated by dividing the mass of the material by the volume and is normally expressed in g/cm3. 0000159988 00000 n 0000140352 00000 n WebSpecific gravity is the (unit less) ratio of the solid wood density to the density of water at the same temperature. 0000005946 00000 n Animals do not recognize it as artificial and may mistake it for food causing serious effects on the health of birds or marine animals that might swallow it. Acrylic doesn't have as much impact resistance as polycarbonate; polycarbonate's tensile strength is greater than that of PVC; PVC's heat deflection abilities are lesser than Vivak's; and so on, and so on. SPECIFIC GRAVITY- The ratio of the weight of ?qbC2]2F 0000086690 00000 n CONSTITUTION: An isotactic polyolefin powder or particle of an average particle So, keep reading! Polystyrene is the sixth type of plastic on the list and it can be solid or foamed. It is mostly used for food and drink packaging purposes due to its strong ability to prevent oxygen from getting in and spoiling the product inside. Learn more about our materials and get in touch withour sales team today! WebSimply enter the density of the material in which your are interested, select the shape from the drop-down list, enter the dimensions, then hit the Calculate button. Solid Density vs. Melt Density In 1988, theSociety of the Plastics Industryintroduced the Resin Identification Code (RIC) system which divided plastic resins into 7 different categories. 0000124655 00000 n 0000012608 00000 n The tests for density and SG are particularly significant in the custom sheet industry because plastic sheet is sold on a cost per pound basis. Some of our calculators and applications let you save application data to your local computer. Over 12,000 ASTM standards operate globally, including tests specific to plastics, to help consumers have confidence that the products they purchase will perform as expected. 6, Sec. We don't save this data. There are two basic test procedures to determine the density of a material method A, used for testing solid plastics in water, and method B, used for testing solid plastics in a liquid other than water. Moreover, the decomposition of BPA in landfills does not occur meaning that this chemical will be persistent in the ground and will eventually find its way into water bodies contributing to aquatic pollution. Plastics that belong to group number one are made out ofpolyethylene terephthalate or PET. Machine Design Apps Engineering Calculators 0000117111 00000 n Materials with an index between 1.53 and 1.57 are sometimes considered mid-index, while 1.58 and greater is considered high-index. This test is often seen with the designation ASTM D792. This information can be used to tell whether plastic will float (or sink) if dropped in water (Buoyancy). Perhaps better known by its commercial name Styrofoam its highly inflammable and dangerous as it can leach harmful chemicals, especially when heated (which often happens because, as its found in disposable take-out containers, people oftentimes microwave it to heat up the food inside it). Specific Gravity = (Weight A / Weight B) Density = (Weight A / Weight B) * 0.9976 g/cm3 Applications and Design PA-11 1.04 This site requires JavaScript to function. 0000124911 00000 n 0000172297 00000 n Ultimate tensile strength is the maximum stress the thermoplastic material can withstand before failing, whichever occurs at the higher stress level. 0000137613 00000 n AddThis use cookies for handling links to social media. All prices and offers subject to change. Easy for Beginner: Plastic Material Identification by Buoyancy Test, How to Identify Plastic Materials by Burn Test Accurately, No.98, Ln. Therefore, the specific gravity is a unitless number. 0000005504 00000 n Polychloroprene rubber 1.23 Power Transmission Tech. 0000117341 00000 n PA-12 1.02 0000156682 00000 n Plastic Corporation. Polyacronitrile 1.17 This website uses cookies to collect necessary user browsing behaviors so that we can provide you with a better browsing experience. How about an incentive to share this post? Learn More, Density and Specific Gravity ASTM D792, ISO 1183, K-SHOW:Visit us at K2022: Supporting Polymers and Materials Development, NEW SERVICE:CircularAssure - Services to help you close the loop in the circular economy for plastics, ARTICLE:Processability and evaluation programmes for recycled plastic materials, ARTICLE:Adhesives Quality Assurance Testing Programs, ARTICLE:Enabling Polymer Non-Wovens Development, CASE STUDY:Polymer Surface Contamination Resolution, CASE STUDY:Polymer Failure - Distribution and Dispersion of Fillers, Ensuring the Safety and Performance of Electrical Products, Testlopedia - The Plastics Testing Encyclopedia, Plastics Circular Economy Solutions - CircularAssure, Physical and Mechanical Testing of Polymers, Thermal Analysis of Polymers and Plastics, Polymer Regulatory and Consulting Services, Polymer Product Processing Development Support, Microbeads and Microplastics Testing and Consultancy, Coatings and Thin Films Analysis and Testing, Supporting Polymers and Materials Development, Processability and evaluation programmes for recycled plastic materials, Adhesives Quality Assurance Testing Programs, Polymer Failure - Distribution and Dispersion of Fillers. Fluids Flow Engineering 0000004768 00000 n Polytetrafluorethylene 2.27, Working Days & hours Details for Alfa Plast Mould, Alfa Plast Mould 2008 | All Rights Reserved. Friction Formulas Apps Guide to Plastic Weights - Find Out How Much Each Type 0000015222 00000 n If you are interested in knowing more about what we do, click here. Heres a brief recap of what we have learned so far: We hope this blog post has provided some clarity about the differences among all these plastic types. For example, some types of plastic are reusable and others arent because of the chemicals they contain; some can be recycled and others need to be disposed of in a different way. Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications! 0000157774 00000 n The specific gravity of a substance is a comparison of its density to that of water. You can target the Engineering ToolBox by using AdWords Managed Placements. Polyvinyl acetate 1.19 Though that may seem like a simple and not particularly worthwhile distinction, any engineer worth their salt will tell you that weight is of the utmost importance when deciding whether a material is appropriate for a particular project. In recent years, the use of these resins has been controversial: the basis of this controversy is their leaching that, occurring at high temperature, releasesbisphenol A, a compound that is on the list of potential environmental hazardous chemicals. The information contained in this article is for general information purposes only. Downloads 1 cm3 water weighs 1 g (as mentioned, density of water is 1g/cm3), and 1cm3 aluminum weighs 2.7 g (the density is 2.7 g/cm3), thus specific gravity of aluminum is 2.7 1 = 2.7 (which has the same value with density), **Tip: To look it up efficiently, mobile phone viewer, please use site searching, computer viewer, please use "Ctrl + F"**, Remarks: Glass Fiber (GF), Carbon Fiber (CF), Mineral Fiber (MF), Impact Modified (IM), Low Friction (LF), Talc Filled (TF), Ultra High Molecular Weight Polyethylene (UHMWPE), Crosslinked Polyethylene (XLPE), Density of Chemical Additives forInjection Molding. Whether your business is local or global, we can help to ensure that your products meet quality, health, environmental, safety, and social accountability standards for virtually any market around the world. | Contact, Home Density of Plastics: Technical Properties. Density measures the mass per unit volume. It is calculated by dividing the mass of the material by the volume and is normally expressed in g/cm 3. The density of a plastic sample may change due to change in crystallinity, loss of plasticizers, absorption of solvent, etc. 0000134268 00000 n Continue reading to learn more! This information can be used to tell whether plastic 0000014816 00000 n 0000015048 00000 n WebSpecific Gravity Information. Polybutylene 0.60 Therefore, for the same 1cm volume, the melted plastic weighs less than the solid plastic (0.933 g/cm vs. 1.054 g/cm). 0000149962 00000 n The most widely used member of the vinyl family, PVC is excellent when used for corrosion-resistant tanks, ducts, fume hoods and pipe. PVC 1.37-1.39 0000130285 00000 n S g = p s /p h20 S g = Specific Gravity of the 0000173123 00000 n 0000141220 00000 n Calculate Shot Size Vs. Barrel Capacity Environmentally-speaking its among the worst types of plastic: first, it is regarded as notbiodegradable. 7 0 obj<> endobj xref 7 103 0000000016 00000 n Despite its many advantages and efforts made by the plastic industry to increase its reusability, PVC is still hardly recyclable and should therefore be avoided, whenever possible. 0000152962 00000 n Polycarbonate 1.2 The tests for density and SG are particularly significant in the custom sheet industry because plastic sheet is sold on a cost per pound basis. General Fax: 860-963-1998, Understanding Your Data Sheet: Density & Specific Gravity, So youve narrowed down what material you need thanks to our. **Ji-Horng Plastic is a leading plastic injection molding manufacturer since 1986, for more information, please contact us!**. Plastic (CR-39) and Crown Glass are considered base index with indices of 1.498 and 1.52 respectively. Specific gravity, generally speaking, measures the density of an object as compared to water. resistant to a variety of bases and acids, some solvents and chlorinated hydrocarbons may damage the material, common as DEV - Drainage, Waste and Vent - pipes, only compression and banded type joints used. 0000004599 00000 n But they can also be found on mobile phones and, more frequently, in compact-discs (CD). Thermoplastics - Physical Properties - Engineering ToolBox Heat Transfer Feedback Advertising Bearing Apps, Specs & Data Natural rubber 0.91 Impact Consumer Products Group All Rights Reserved 2023, 5 Highland Drive 0000051762 00000 n Plastics Synthetics Polyamide Do you have a packaging idea and need some guidance on which material is best? The lower the density or SG of a particular material, the more material per pound or surface area you will get. Specific GravityDensity and specific gravity sound quite similar, some even say that they are synonyms; however, they are actually not the same, below we are going to introduce the differences of them.What's the meaning of "Density"?Density ismass or weight of a substance per unit volumeundernormal temperature and pressure. Mechanical Tolerances Specs Beam Deflections and Stress In order to help you make better-informed decisions about the products that you buy, today we will go through the seven different types of plastic, how they differ, and their impact on the environment. 0000173991 00000 n %PDF-1.4 % Electric Motor Alternators I'm Gelson Luz, mechanical engineer, welding specialist and passionate about: I am building this blog to be the best learning blog about engineering! HWM7W=T+[h#E\Zc"YLGr>ZH Polyethylene Each one is different from the other and has different uses. 0000143715 00000 n Spring Design Apps Technical name - High-Density Polyethylene its an incredible resistant resin used for grocery bags, milk jugs, recycling bins, agricultural pipe, but also playground equipment, lids, and shampoo bottles among others. You have no items in your cart. LDPE is used for the infamous plastic bags that are usually used for a few seconds and then discarded. 0000176664 00000 n LLDPE 0.91-0.94 Now we need a minimum of 6.16 x 1.28 or 7.88 oz of shot capacity. Web800.789.1718. 0000171239 00000 n WebMinerals and other Materials - Specific Gravities Specific gravities for minerals and other materials. 0000131261 00000 n View Cart. Physicists use 39.2 F (4 C) as the standard, but engineers ordinarily use 60 F. In the International System of Units (SI Units), the density of water is 1.00 g/cm3 at the standard temperature. This bucket is economically priced, while still featuring premium bucket quality and durability. (You will help other colleagues find this blog). Due to the different density of plastic, we can easily identify different plastics by "Buoyancy Test", for more information, please check out in related articles. This broad range of flexible Tygon tubing products are engineered to meet many user specifications including chemical resistance, fluctuations in temperature, abrasion, high purity and long servicelife. One of the most remarkable features of plastic is just how greatly its features can vary from variety to variety. 0000168199 00000 n the molded piece as compared to the weight of an equal volume of water Copyright 2000 - 2023 United States Plastic Corporation. We don't collect information from our users. Polypropylene 0.90-0.92 The purpose was to provide a consistent national system to facilitate recycling of post-consumer plastics." Available in a range of sizes these trays have many industrial uses. WebThough some manufacturers use grams per cubic centimeter to indicate the weight of their products, others merely provide the specific gravity of their material. The standard test method for the determination of density and specific gravity 0000011164 00000 n 0000132332 00000 n 0000002716 00000 n 0000167357 00000 n Definition: Density v.s. When the plastic that expanded beyond the container is removed we now find that the remaining cube of heated plastic inside the container weighs only 0.933 grams. But if youre new to the industry, or dont work in a technical role, the information stated on material data sheets can leave you more confused than when you started. Plastic Corp. carries an excellent selection of spray bottles perfect for cleaning. Therefore, the specific gravity (which is dimensionless) for a liquid has the same numerical value as its density in units of g/cm3. LDPE 0.91-0.93 And The SI unit is Kg/m3. From here density and SG are calculated using the following formulas: Specific Gravity = (Weight A / Weight B)Density = (Weight A / Weight B) * 0.9976 g/cm3 , where 0.9976 g/cm3 is equal to the density of distilled water at 23C. Tensile yield strength is the maximum engineering stress in psi (or Pa) at which a permanent non-elastic deformation of the thermoplastic material begins. 0000151915 00000 n Styrene-butadiene 0.93 WebSpecific gravity is a measure of the ratio of mass of a given volume of material at 23C to the same volume of deionized water. In 1988, the Society of the Plastics Industry introduced the Resin Identification Code (RIC) system which divided plastic resins into 7 different categories. Design & Manufacturability Physics Polystyrene 1.05 0000006688 00000 n Since the density of a fluid varies with temperature, specific gravities must be determined and specified at particular temperatures. Phone: 860-963-1976 Civil Engineering Strength of Materials ASTM D792 Hardware, Metric, ISO Typical properties of some common thermoplastics: For full table with Thermal Conductivity, Specific Heat and Maximum Temperature Limit - rotate the screen! Finish: Solid. Specific gravity and density are especially relevant because plastic is sold on a cost per pound basis and a lower density or specific gravity means more material per pound or varied part weight. There are two basic test procedures- Method A and Method B. The more common being Method A, can be used with sheet, rod, tube and molded articles. 0000002356 00000 n Plastic Material: Density & Specific Gravity PA66, 1.13 - 1.15 PA66 + 30% GF, 1.37 PA66 + 30% MF, 1.35 - 1.38 PA66 IM, 1.05 - 1.10. 0000170169 00000 n Density in plastics is the measurement of mass per unit volume. Fun fact: because it is VERY resistant to fatigue, PP is usually used for living hinges (the thin piece ofplastic that allows a part of a product to fold or bend from 1 to 180 degrees). Threads & Torque Calcs It has a durometer of 50 D, a tensile strength of 1600 PSI, a brittleness temperature of -76F, a specific gravity of .921, and an elongation at break. WebMaterial density g/cc 1 g/cc = material density = specific gravity Therefore, knowing the specific gravity and with the help of the handy conversion table on the shared drive one Hard and sturdy, it can withstand high temperatures and is found in tupperwares, car parts, thermal vests, yogurt containers, and even disposable diapers. It has the simplest structure of all the plastics, making it easy and cheap to produce. In its rigid form, PVC is largely used in the building and construction industry to produce door and window profiles and pipes (drinking and wastewater). Specific Gravity Of Plastic

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specific gravity of plastics chart