How to calculate the density of foam What is the density of foam

Foam: A system of dispersions formed by the dispersion of insoluble gases in liquids or molten solids. The linear size of its volume is more than 10-5 cm.

Its shape often varies depending on the environment. For example, soap foam, beer foam, etc. are all dispersions of gases dispersed in liquids. For example, foam plastic, foam rubber, foam glass, etc. are all dispersed systems of gas dispersed in molten solids, which are obtained by cooling. Sponge.

Show you the question.

A bubble floats on the surface of the water, it has 3 4 volumes out of the water, and when the bird stops on the foam, the foam is just submerged in the water, and the density of the foam is found.

Let the density of water be , the volume of foam is v, and the mass of foam is m

After applying a force of * g n to it.

mg + two formulas compared (i.e., one by two equations) mg

mg+ solution m

Substituting m and =1 into 2 has v=

So the foam density is, i.e. 750kg m3

So the answer is 750kg m3

The two products, one with a lot of voids and the other with basically no voids, are both lightweight materials. Density is the mass divided by the volume.

Density = mass (kg) volume (m³).

I don't know if you have some high-tech stuff or if it's just in a middle school lab or something? I won't talk about high-tech things.,It's nothing more than a formula set.。。。 If you don't, it's going to be difficult, so I won't talk about it.

In general, the foam density is 750kg m3.

The density of plastic foam is only gram cubic centimeters, and with its hollow structure as packaging, 100 kilograms of plastic foam will take up about 50 cubic meters of space.

The density greater than that is low foam foam, the density is medium foam foam, and the density less than that is high foam foam.

Styrofoam is a polymer trapped material with plastic as the basic component and a large number of bubbles, so it can also be said to be a composite plastic with gas as the filler. Compared with pure plastic, it has many excellent properties, such as light weight, high specific strength, early absorption of impact loads, good heat and sound insulation performance, etc. Therefore, it has been widely used in industry, agriculture, construction, transportation and other fields.

Since the advent of foam plastics, its uses have become more and more extensive, and the varieties have been continuously enriched, among which the more common traditional foams mainly include polyurethane (PUR), polystyrene (PS), polyvinyl chloride (PVC), polyethylene (PE), phenolic resin (PF) and other varieties.

Material characteristics: Styrofoam is also called porous plastic. Plastic made with resin as the main raw material and numerous microporous inside.

Light weight, heat insulation, sound absorption, shockproof and corrosion resistant. There are soft and hard substances. It is widely used as heat insulation, sound insulation, packaging materials and vehicle and ship shells.

Compared with pure plastics, foam plastic has low density, light weight, high specific strength, its strength increases with the increase of density, has the ability to absorb impact loads, has excellent cushioning and shock absorption performance, sound insulation and absorption performance, low thermal conductivity, good thermal insulation performance, excellent electrical insulation performance, and has corrosion resistance and mold resistance. Flexible foam has excellent elasticity and other properties.

Plastic with a lot of tiny pores on the inside. It is prepared by mechanical method (air or carbon dioxide is introduced to foam it while performing mechanical stirring) or chemical method (adding foaming agent). There are two types: closed-cell type and open-cell type.

The pores in the closed-cell type are isolated from each other and have floating; The pores in the open type are connected to each other and do not float.

It can be made of polystyrene, polyvinyl chloride, polyurethane and other resins. It can be used as thermal insulation and sound insulation material, and has a wide range of uses. <>

Summary. The foam density is calculated by the formula =m v

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Good. If it is a foam sedan unboxing Xinxiang meter sail weight, it is according to the length * width * height 3000, such as length 50cm, width 40cm, height 30cm, that is, 50 * 40 * 30 3000 = 20kg, can also be calculated in this way.

The foam density is calculated by the formula =m v

To know the mass and volume of the foam, density = mass volume.

1. The quality can be found by weighing.

2. Take an appropriate amount of a graduated cylinder filled with a certain amount of water, and use a fine iron wire to soak the foam in the measuring cylinder, and the last reading of the graduated cylinder - the initial degree = the volume of the foam.

Density is a measure of the mass within a specific volume, density is equal to the mass of an object divided by volume, which can be expressed by the symbol, in the International System of Units and the Chinese legal unit of measurement, the unit of density is kilogram meter.

Abstract:Foam is a chemical material, the full name of bent polystyrene (EPS), is a very common material. What is the density of styrofoam?

What are the ingredients and uses of foam?The following is an introduction to what is the density of foam, what are the components and uses of foam.

Density of linear low-density polyethylene (general): grams of cubic centimeters);Low-density polyethylene density: grams of cubic centimeters);High-density polyethylene density: grams of cubic centimeters).

Composition of raw materials. The main raw materials of polystyrene rental grip ethylene foam tableware are polystyrene, talc, calcium stearate, butane, etc.

Polystyrene: The production process is that the monomer styrene is polymerized in a sealed reactor under high temperature and high pressure and catalyst. Although styrene is an aromatic compound, its reaction is carried out under sealed oxygen-free conditions, without the conditions for producing dioxins, and meets the requirements of food hygiene.

Talc: It is an inorganic mineral (magnesium silicate containing crystal water), with a dosage of about 1%, which plays the role of nucleating agent, and is medical grade.

Calcium stearate: saturated fatty acid salts, dosage of about 1%, playing the role of lubricant, medical grade.

Butane: saturated hydrocarbon, blowing agent. In the past, some production lines have used Freon as a blowing agent, and in order to protect the atmospheric ozone layer, all of them have been switched to butane blowing agents with the assistance of the United Nations "multilateral funds".

Use. Due to its light weight, sturdy, shock absorption, low moisture absorption, easy molding and good water resistance, heat insulation, low quality and other characteristics, it is widely used in packaging, heat preservation, waterproof, heat insulation, shock absorption and other fields, and is one of the most widely used plastics in the world today. It can be applied to the shockproof packaging of electrical appliances, instrumentation, process buried products and other fragile valuables, as well as the packaging of fast food.

Summary. There is a close relationship between foam density and water absorption. Foam density refers to the ratio of liquid and gas in the foam, which determines the stability and strength of the foam.

Whereas, water absorption refers to the ability of an object to absorb water, which can reflect the water absorption performance of the object. The higher the density of the foam, the greater the stability and strength of the foam, and the higher the water absorption. Conversely, the lower the density of the foam, the less stable and strong the foam will be, and the lower the water absorption.

Therefore, there is a positive correlation between foam density and water absorption.

There is a close relationship between bubble-sensitive tremor density and water absorption. Foam density refers to the ratio of liquid and gas in the foam, which determines the stability and strength of the foam. The water absorption rate refers to the ability of the object to absorb water, which can reflect the water absorption performance of the object.

The higher the density of the foam, the greater the stability and strength of the foam, and the higher the water absorption. Conversely, the lower the density of the foam, the less stable and strong the foam will be, and the lower the water absorption. Therefore, there is a positive correlation between foam density and water absorption.

I'm sorry I don't understand, but can you elaborate on that?

There is a certain relationship between foam density and water absorption, but this relationship is not absolute. The higher the density of the foam, the lower the water absorption rate of the bond, and vice versa. When the foam density is too high, the water absorption rate will be affected by the movie holes, because the foam density is too high, which will cause the voids between the bubbles to become smaller, thus reducing the water absorption rate.

In addition, too high a foam density can cause bubbles to burst, which reduces water absorption. The solution to this problem is to reduce the foam density to ensure that the voids between the bubbles are large enough to increase water absorption. In addition, more advanced foam technologies, such as ultrasonic foam technology, can be used to improve the stability of the foam and thus improve water absorption.

Personal tip: When using foam technology, care should be taken to control the foam density to ensure foam stability and water absorption.

Hello dear, the foam square meter algorithm is as follows: "The square number of foam is its area, and the length times the width is the square area." 1 meter * 1 meter = 1 square meter, if the width of the foam exceeds 1 meter, such as meters, its 1 meter is squared.

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Show you the question.

A bubble floats on the surface of the water, it has a volume of 3 4 out of the water, and the quality of the bird stops on the foam when the source of the foam is just set up and submerged in the water, find the density of the foam.

Let the density of water be , the volume of foam is v, and the mass of foam is m

After applying a force of * g n to it.

mg+ two equations (i.e., one divided by two equations).

mg -- type branching.

mg+ solution m

Substituting m and =1 into 2 has v=

So the foam density is, i.e. 750kg m3

So the answer is 750kg m3