Several key performance indicators of rubber insulation materials

1. Rubber and plastic materials

Rubber is a flexible insulation material made mainly of NBR and PVC, which undergoes processes such as mixing, opening, extrusion, vulcanization and foaming, and cooling. It has a completely closed cell structure and is similar to a static gas without convection. Its thermal conductivity can be as low as 0.032w/(m · k), which can effectively reduce the heat conduction between containers or pipelines and the external environment, thus playing a role in insulation/cooling.

2.  Application Fields

Rubber and plastic materials are excellent environmentally friendly and non-toxic insulation materials due to their advantages of thermal insulation, moisture resistance and mold prevention, fire resistance and flame retardancy, environmental friendliness and non toxicity, vibration reduction and noise reduction, softness and elegance. Widely used in the following fields:

1. Central air conditioning duct/water pipe insulation;

2. Building wall insulation;

3. Indoor sound insulation and shock absorption;

4. Hospital cleanliness and mold prevention;

5. Industrial dust-free workshop;

6. Instrument and equipment shock absorption and buffering.

3. Key performance indicators of rubber insulation

The main performance indicators for measuring the quality of rubber insulation materials include thermal conductivity λ, moisture resistance factor μ, and combustion performance.

1. Thermal conductivity coefficient λ

Thermal conductivity is the most important performance indicator of insulation materials, determining their insulation performance. In materials science, it is represented by "λ". The smaller the thermal conductivity, the better the insulation/cooling performance of the material. On the contrary, the larger the coefficient, the worse the insulation/cooling effect of the material, which not only fails to achieve insulation effect, but also causes a significant loss of energy.

At 0 ℃, the thermal conductivity of Ubbelyn rubber insulation material is as low as 0.032W/(m · k), making it an ideal insulation material.

Microstructure of Bubbles in Rubber Foam Materials

2. Moisture resistance factor μ

The moisture resistance factor is an indicator of a material's ability to resist water vapor infiltration, represented by "μ" in the industry. The larger the moisture resistance factor, the stronger the product's ability to block water vapor; The stronger the ability to resist water vapor penetration, the longer the service life of the material.

In general, the moisture absorption rate of a material can be determined by testing its moisture permeability coefficient. However, the absolute value of the moisture permeability coefficient obtained from testing is very small, the unit is complex, and it is directly related to the local atmospheric pressure. Therefore, materials science has introduced the index value of moisture resistance factor, which directly determines the material's ability to resist water vapor penetration based on its size. A value of over 20000 μ is considered to completely isolate water vapor infiltration.

3combustion performance

The latest national standard (GB8624-2012) divides the combustion performance of building materials into several levels: A, B1, B2, and B3.

The higher the combustion performance level, the better the flame retardancy, and the higher the fire safety.

The insulation materials on the market, except for traditional inorganic materials that can achieve Class A non combustible, all other products are at or below B1 level. The "Code for Fire Protection Design of Buildings" (GB50016-2014) has clear fire rating requirements for building insulation materials. For fire safety considerations, the combustion performance level of insulation materials should not be lower than B1 level.

Although traditional inorganic materials (such as rock wool) have Class A fire resistance, they have a high water absorption rate and moisture easily accumulates in the rock wool board, causing a serious decrease in insulation performance. Moreover, prolonged use can increase the weight of the insulation layer, leading to insulation layer detachment and a high repair rate. At the same time, the material installation process is more complex than that of rubber, and it is difficult to achieve complete adhesion between the board joints, resulting in an increase in labor costs and a decrease in insulation effect.

Rubber insulation materialCompared to traditional inorganic materials, the biggest advantage lies in its excellent and durable insulation performance.

In summary, rubber and plastic are excellent insulation materials. When selecting rubber and plastic insulation materials in energy-saving and environmental protection systems, the most important indicators to consider are thermal conductivity λ, moisture resistance factor μ, and combustion performance.