Analysis of the technological development status of China's thermal insulation materials industry in 2018. Hydrophobicity is an important development direction of thermal insulation materials
Classification of thermal insulation materials
Insulation Thermal insulation materials refer to materials or material composites that have significant resistance to heat flow. They are classified in many ways. For example, according to material composition, they can be divided into inorganic thermal insulation materials, organic thermal insulation materials and composite thermal insulation materials; Material shapes can be divided into loose thermal insulation materials, plate-like thermal insulation materials and overall thermal insulation materials; according to the material state, they can be divided into five categories: fibrous, bubble-like, microporous, nano-like and layer-like; The use temperature can be divided into three types: low-temperature insulation materials, medium-temperature insulation materials and high-temperature insulation materials. Among them, high-temperature insulation materials are often called "fire-resistant insulation materials"; according to the structure, they can be divided into solid matrix continuous and Classes with discontinuous pores (such as foam plastics); Classes with discontinuous solid matrix and continuous pores (such as powder filling); Classes with continuous solid matrix and pores (such as fibrous and multi-layer structures).
The technological development history of the thermal insulation material industry
Before 1980, the development of thermal insulation materials in China was very slow. The few thermal insulation material manufacturers could only produce a small amount of Expanded perlite, slag wool, ultra-fine glass wool, microporous calcium silicate and other products cannot meet the needs of national construction in terms of product variety, specifications and quality.
Since the reform and opening up, my country's thermal insulation materials have developed rapidly, and now have a relatively complete variety and a thermal insulation material production and technology system that has begun to take shape; especially after nearly 20 years of rapid development, it has formed a leading industry It is an industry with a relatively complete range of products based on expanded perlite, mineral wool, glass wool, foam plastics, refractory fibers, calcium silicate insulation products, etc., and its technology and production equipment levels have also been greatly improved.
The latest thermal insulation coating developed in 2016, the thermal insulation coating has an extremely low thermal conductivity and a thermal insulation rate of more than 90. The excellent performance of high-temperature insulation coating not only plays a role in the development of high-tech It plays an important role in promoting and supporting, and has been successfully used in petroleum and petrochemical, aerospace, electric power, light industry, metallurgy, transportation, construction and other fields.
In 2017, Beijing Zhisheng Weihua Technology developed the latest heat-reflective thermal insulation anti-corrosion coating ZS-223 and transparent heat-reflective thermal insulation coating ZS-255, which can not only reflect solar heat to the maximum extent, but also provide heat insulation It also has high hydrophobicity, self-cleaning properties, anti-corrosion resistance against acid and alkali media, salt spray and sea water, anti-oil and anti-ash adhesion, and the visible light transmittance can reach 80-85. Market prospects and applications The value is very broad.
Technical status quo of the thermal insulation materials industry
◆ Analysis of the number of industry patent applications
With the expansion of the application fields of thermal insulation materials and the demand in various fields, The performance requirements for thermal insulation materials have increased, and industry technology has also developed rapidly. According to statistical data from the "Thermal Insulation and Insulation Materials Industry Market Prospects Forecast and Investment Strategy Planning Analysis Report" released by the Qianzhan Industry Research Institute, the number of applications for patents related to thermal insulation and thermal insulation materials in my country has been rising rapidly since 1992. The number of patent applications related to thermal insulation materials industry was 310, which rose to 636 in 2015, reaching the highest value in recent years. In 2017, the number of patent applications related to thermal insulation materials was 300. After 2010, the number of patent applications in the industry has increased.
Changes in the number of patent disclosures
Judging from the number of patent disclosures for thermal insulation materials in my country, since 1994, the number of patent disclosures in the industry has shown a fluctuating upward trend. Especially after 2010, the number of published patents in the industry has increased very quickly. In 2010, the number of published patents related to thermal insulation materials nationwide was 287. In 2016, it rose to 694, a record high; in 2017, the number of patents related to thermal insulation materials published was 660. pieces.
Analysis of industry patent applicants
From the perspective of the composition of patent technology applicants for thermal insulation materials in my country, patent technologies in my country’s thermal insulation materials industry are not concentrated, ranking first The first is Qingdao Wuwei Thermal Insulation Materials Co., Ltd. As of the end of January 2018, the number of patent technology applications in the thermal insulation materials industry was 36, accounting for 0.59 of the total number of patents in the industry; followed by Tianjin Yushen Energy Saving Insulation Materials Co., Ltd., with patent technology applications The number was 24, accounting for 0.39 of the total number of patents in the industry. The number of patent applications of other enterprises is less than 20.
Analysis of popular patent technologies in the industry
From the perspective of the patent distribution field of thermal insulation materials in my country, E04B1/00: general structure; not limited to walls, such as partition walls, or floors or The ceiling or roof has the largest number of patent applications for any structure, with the cumulative number of applications reaching 717, accounting for 6.77 of the total; followed by C04B28/00: containing inorganic binders or containing reaction products of inorganic and organic binders The number of patent applications for compositions of mortar, concrete or artificial stone is 531, accounting for 5.04 of the total.
Hydrophobicity is an important development direction of thermal insulation materials
The water absorption rate of the material is an important factor that should be considered when selecting thermal insulation materials. The thermal conductivity of water at room temperature is that of air. 23.1 times. When the thermal insulation material absorbs water, it will not only greatly reduce its insulation performance, but also accelerate the corrosion of metal, which is very harmful. Most thermal insulation materials in my country are not hydrophobic and have high water absorption rates, which greatly affects the use effect and lifespan of thermal insulation materials.
Therefore, hydrophobicity will be an important development direction of my country's thermal insulation materials in the future.