**2. Analysis of thermal insulation materials for fencing bodies of refrigerated wagons and containers**

In recent years, the most commonly used insulation is made of polyurethane foam, which is applied to finished surfaces by spraying [21, 22]. **Table 1** shows some characteristics of the materials used.


*Experimental Research of New Design Solutions for Fencing Refrigerated Wagon Bodies… DOI: http://dx.doi.org/10.5772/intechopen.109744*

#### **Table 1.**

*Characteristics of insulation materials.*

To ensure a low value of the heat transfer coefficient, the dimensions of the thickness of the body fence with these materials are in the range of 160–240 mm. The fences of the vehicle body with the specified materials do not protect against the formation of fogging of the body fence elements and the formation of moisture inside the body, which is harmful to the transported goods.

When repairing refrigerated wagons and containers, it is necessary to replace almost all the elements of the body fence due to moisture damage [13, 21].

The consumption of materials for body fencing is quite high, which undoubtedly affects the cost of vehicles. The search for materials for thermal insulation of the body of vehicles that could become ideal continues [27–29].

To protect building structures from moisture and heat preservation indoors at low temperatures, the thermal insulation material "Corundum" [30], created in 2008, and


#### **Table 2.**

*Comparison of technical characteristics of traditional and new thermal insulation.*

produced by Russian manufacturers, is used. This material is a one-component polymer suspension, to which the smallest ceramic heat-sealed granules are added, which are characterized by the physical principle of reflection and heat transfer. The content of such granules (microspheres) in the suspension reaches 70%. Depending on the intended purpose, pigmenting fire-resistant, anticorrosive and inhibitory components are added to the composition. All this makes it possible to obtain thermal insulation with high adhesion and elasticity, which does not change under the influence of external factors: humidity, ultraviolet rays, temperature changes, mold and fungi. The basis of corundum is an Aqueous-F acrylic solution, to which the above components are added [31]. In addition, a number of new materials have appeared. Basic information about these materials is given in **Table 2**. Therefore, the task arises to assess the possibility of using these materials in the construction of fencing of wagons and containers [32].
