Porous plastic, also known as foam plastic, is a substance with a fine-porous plum cotton-like structure formed by foaming with synthetic resin as the matrix, adding foaming agent and other additives. Commonly used resins are polyethylene, polystyrene, polyvinyl chloride, polypropylene, polyurethane, etc. Commonly used foaming methods include physical foaming method, chemical foaming method and mechanical foaming method. It has the characteristics of light weight, heat insulation, sound absorption, shock absorption, etc., and its dielectric properties are better than those of matrix resins, so it has a wide range of uses.
Porous plastics have different properties due to their different densities and structures, and from a packaging point of view, porous plastics generally have the following characteristics:
1. The density is very small, generally at 002-0.2g cm3, so the weight is very light, the consumption of raw materials is less, which not only reduces the weight of packaging, but also reduces the cost of transportation, and the cost is not high.
2. It has excellent impact absorption performance and excellent shockproof effect, which can effectively protect the packaged items.
3. Good mechanical properties, good compressive strength and resilience, especially it can choose porous plastics with different properties according to the weight of the packaged items.
4. Good chemical stability, strong resistance to acids, alkalis, salts and other chemicals, its own pH value is neutral, and it will not corrode the packaging items.
5. Excellent processing performance, it can not only be made into soft and hard porous plastics of different densities, but also molded into various packaging containers according to the shape and size of the packaged items, and can also be bonded with a variety of adhesives to make various buffer structural materials.
6. It has good water resistance and very low moisture absorption, and will not deform and destroy the body even in the humid situation, which affects its ability to absorb external forces.
7. It has quite good stability to temperature changes, and can fully meet the requirements of general normal packaging.
8. Because the porous plastic contains a large number of tiny bubbles, it has excellent thermal insulation performance, and can be used as thermal insulation material and can also be used for thermal insulation packaging
A new generation and morePore plastic density meterDetection is fast and convenient, and the data is accurate. Both the exterior and built-in operation have been fully upgraded, with full color 43 inch touch screen, curve concentration measurement algorithm, Type-C charging interface, USB communication interface, according to: GB T13531, T5526, T5009, ASTM, JIS, ISO and other specifications. Using the Archimedes' principle displacement method, the relative density, concentration, specific gravity, and Baumé degree of the liquid can be quickly read. Combined with modern microelectronics technology for design and manufacturing, it belongs to the digital display touch in February**Dynamic incentive plan screen electronic density meter. Pore plastic density meterTechnical Parameters:
Model: Mayb302
Weighing range: 001-300g
Density accuracy: 0001g/cm3
Density range: 0001-2.2000g/cm3
Test Steps
1. Put the sample into the measuring table, measure the weight in the air, and press the save button to save.
2. Put the sample into the water to measure the weight in the water, press the save button to save, and display the density value.