Flame-retardant mildew-resistant thermal-insulation material for refrigeration equipment and preparation method thereof

Abstract

The invention discloses a flame-retardant and mildew-proof heat preservation material for refrigeration equipment, which comprises the following raw materials in parts by weight: 14-18 parts of alkali-free glass fiber, 10-14 parts of hollow glass micropowder, 120-160 parts of polytetrahydrofuran glycol, polytetrahydrofuran glycol 120-160 parts, 30-40 parts of ester polyol, 3-5 parts of foaming agent, 15-25 parts of flame retardant additive, 2-4 parts of foam stabilizer, 1-3 parts of catalyst, 4-6 parts of anti-mold and fungicide, mineral filling 13‑17 parts, 5‑7 parts of coupling agent. The thermal insulation material of the present invention has low thermal conductivity, excellent thermal insulation performance, good mechanical strength, excellent uniformity, air permeability, elastic recovery rate, and in addition, the material has strong flame retardancy and bactericidal and anti-mildew effects At the same time, the raw material components of the present invention are safe and reliable, have no pollution to the environment, have low cost, and are simple in process, and have high practical value and good application prospects when used as insulation materials for refrigeration equipment.

Description

technical field [0001] The invention relates to the technical field of refrigeration equipment materials, in particular to a flame-retardant, mildew-proof and thermal insulation material for refrigeration equipment and a preparation method thereof. Background technique [0002] Polyurethane foam is currently the leader among all thermal insulation materials, and is widely used in many thermal insulation fields such as refrigerator freezers, solar water heaters, pipeline building insulation, cold storage panels, transportation, aviation and military. In recent years, with the increasing rise of life science and biogene technology, the demand for low-temperature medical freezer products has been increasing year by year, especially the demand for low-temperature medical freezers at -86°C is the largest, and they are widely used in medical, scientific research, biotechnology and other fields. It is used for the preparation of low-temperature environment and the low-temperature s...

AI Technical Summary

Problems solved by technology

In recent years, with the increasing rise of life science and biogene technology, the demand for low-temperature medical freezer products has been increasing year by year, especially the demand for low-temperature medical freezers at -86°C is the largest, and they are widely used in medical, scientific research, biotechnology and other fields. It is used for the preparation of low-temperature environment and the low-temperature storage of substances. Due to the large temperature difference between the inside and outside of the low-temperature medical freezer, the temperature distribution in the cabinet is usually uneven, which seriously affects the quality and safety of the preserved material. , there are high requirements for the low-temperature dimensional stability, compressive strength and thermal conductivity of polyurethane foam, while the ordinary cyclopentane-type combined polyether focuses on the safety of the blowing agent, and the prepared foam has a high density and the size of the foam Stability and thermal insulation are poor, the compressive strength and low temperature resistance dimensional stability of the foam prepared by HCFC-141B are poor, and the shrinkage and deformation of the working foam over time under long-term low temperature conditions are relatively large, resulting in a gradual decrease in the thickness of the foam layer. The thermal conductivity and compressive strength of the foam will be reduced, and the thermal insulation performance of the polyurethane foam will be significantly reduced, greatly affecting the thermal insulation effect and increasing energy consumption, resulting in waste of resources

[0003] On the other hand, the insulation materials used in refrigeration equipment today have low fire-proof and flame-retardant properties, and basically no bactericidal and anti-mildew properties. Therefore, it is urgent to develop a thermal insulation material with good thermal insulation effect, low cost, flame-retardant and anti-mildew