Specific Weight of Plastic: Weight of 1 m³, Plastic Density and Reference Table
Plastic is a broad group of materials made from natural or synthetic high-molecular-weight compounds. The most common plastics are based on synthetic polymers. The name “plastic” refers to the material’s ability to be shaped under heat and pressure while retaining its form after cooling or curing.
Plastic offers many useful properties, including low thermal conductivity, good electrical insulation, high resistance to moisture, many acids and alkalis, and excellent durability. Different plastics can also be modified with fillers, pigments, glass fibers, fabrics and other additives to obtain the required mechanical and performance characteristics.
Today, plastics are used in almost every industry, including packaging, household products, construction materials, pipes, automotive components, electrical equipment, medical devices and countless other applications.
When working with plastic, it is important to consider its physical properties. One of the key characteristics is density, which allows the weight of a given volume of material to be determined.
Plastic Density Table
Although many users search for the “specific weight of plastic”, engineering calculations are usually based on the material’s density. Measuring density accurately requires laboratory equipment, but average reference values are well established.
Specific Weight and Weight of 1 m³ of Plastic
| Material | Density (g/cm³) | Weight of 1 m³ (kg) |
|---|---|---|
| Plastic (average value) | 1.1 | 1100 |
Note: The actual density depends on the type of plastic and may vary considerably.
Specific Weight Calculation
Specific weight is the ratio of weight to volume and is calculated using:
γ = ρ × g
where γ is the specific weight, ρ is density, and g is the gravitational acceleration (9.81 m/s²).
In practical engineering, density expressed in kg/m³ is used much more frequently than specific weight.
Plastic Density
Density represents the mass contained in one cubic meter of material. It depends on the type of plastic, temperature, fillers and other factors.
For different plastics, density typically ranges from 0.85 to 1.80 g/cm³, which corresponds to 850–1800 kg/m³.
Conclusion
The average density of plastic is approximately 1.1 g/cm³, giving an average weight of about 1100 kg per cubic meter. For accurate calculations, always use the technical specifications of the specific plastic grade.
Frequently Asked Questions
Can the density of plastic be used for precise calculations?
The density and weight values for plastic in this article are reference values. They are suitable for preliminary estimates, but design, construction, production and other critical calculations should be checked against standards, material datasheets or measurement results.
Why can the actual weight of plastic differ from the table?
The actual weight of plastic depends on composition, moisture, temperature, porosity, fraction size, material grade and measurement conditions. Because of this, real values may differ from the average table data.
How do you calculate the mass of plastic from density?
For an approximate calculation, use the formula: mass = density × volume. If the density of plastic is given in kg/m³ and the volume is in m³, the result will be in kilograms.