With the continuous progress of the times, the rapid development of the building materials industry, and the difficulties and obstacles encountered in the development of the new building materials industry, new energy-saving building materials mainly include new wall materials, chemical building materials, new thermal insulation materials, building decoration materials, etc. Although there is market demand, in fact, the development of new energy-saving building materials is currently difficult due to cost and market restrictions and technical barriers. In fact, people's choice of building materials directly affects the development of energy-saving building materials. At present, in interior decoration, many owners are reluctant to spend money to use new energy-saving and environmentally friendly building materials products due to lack of awareness of energy conservation and environmental protection. As a result, the formaldehyde content in the decorated rooms exceeds the standard, which not only harms the owners' health and causes economic losses, but also causes Huge waste of material.

Although new energy-saving building materials have the advantages of high technological content, low resource consumption, long service life, and less environmental pollution, the cost of use is not higher than that of ordinary building materials. However, in terms of market price, they do not have a competitive advantage. The production cost of energy-saving building materials is too high, making it difficult for these new products to lower their prices and become the darling of the market. For example, the new insulation material polyurethane rigid foam currently only accounts for less than 10% of its use in exterior wall insulation. Only a few large-scale real estate development companies that focus on brand building use polyurethane rigid foam exterior wall insulation systems.

At this stage, the competition among most new building materials companies in my country is concentrated on mid- to low-end products. There are relatively few products with higher technical content, and competition in the high-end field is not fierce. The most obvious one is the plastic pipes and doors and windows industry. Currently, there is overcapacity and slowdown in market growth in mid- to low-end products across the country. Domestic plastic water pipes and pipe fittings are mostly general-purpose products. Pipes and pipe fittings with high usage requirements and high added value are rarely produced, which greatly limits their market application. The application of plastic pipes in high-end fields is only in its infancy. The main reason is that the industry lacks scientific and technological investment and insufficient technological innovation in saving energy and resources, which affects the improvement of the overall level of the entire industry. As for the PC transparent board market, which is favored by the market, due to high technical requirements, domestic companies are unable to achieve technological breakthroughs, and most of the market positions are occupied by foreign companies.

At present, in the production and sales of plastic building materials such as wall interior and exterior insulation panels and roof waterproofing materials with high profit margins, production companies have short-sighted behaviors that are eager for quick success and quick gains, laying hidden dangers for the development of the industry. In addition, building energy-saving materials such as cement hollow bricks that replace clay solid bricks and clay hollow bricks have been widely promoted. However, such products also have problems such as insufficient strength and large construction differences that affect the quality of the project.

In addition to the two major bottlenecks mentioned above, the relevant encouraging and supporting policies are incomplete, the building materials industry itself has problems such as low threshold for development, low concentration, disordered market competition, and the pressure on enterprises to move to high-tech and high-end markets. These are all important reasons why it is difficult for new energy-saving building materials to develop rapidly in a short period of time, and to grasp important development pulse and market opportunities.

Promotion of thermal insulation materials cannot be “one size fits all”

In recent years, fires caused by polyurethane foam, the exterior wall insulation material, have continued. Zong Licheng, a member of the National Committee of the Chinese People's Political Consultative Conference and vice chairman of the Shandong Federation of Industry and Commerce, submitted a proposal this year, suggesting not to fully promote polyurethane foam insulation materials.

"Polyurethane insulation materials are extremely flammable and will produce highly toxic gases after burning." Zong Licheng said that polyurethane foam can be found in the CCTV building fire, the "11·15" fire in Shanghai, and the Shenzhen Dance King Club fire. .

Zong Licheng said that since 2001, my country has made it mandatory for residential buildings to have exterior wall insulation. In 2007, it was stipulated that buildings without exterior wall insulation will not be inspected and accepted. “Relevant departments will not accept acceptance of buildings using other insulation methods. The one-size-fits-all approach promotes the use of polyurethane foam materials," Zong Licheng said. However, this insulation material is easy to deform, crack, and fall off, and may not necessarily be energy-saving and thermal insulation. In developed countries in Europe and the United States, the use of flammable insulation materials such as polyurethane foam has long been banned.

Therefore, he suggested that it is not appropriate to promote the use of polyurethane foam boards for building exterior wall insulation and interior decoration to reduce building fire hazards. Various regions can achieve thermal insulation and energy saving by thickening walls, sandwiching perlite between walls, and sandwiching foam between walls according to the thickness of the local frozen layer.

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