Five ways to change the development mode of China's polyurethane prefabricated insulation pipe manufacturing industry

Polyurethane prefabricated insulation pipe manufacturing industry is an important livelihood industry, the market competition is fierce, and people's lives are closely related. It has the characteristics of small products, large market and large industry. In recent years, polyurethane prefabricated insulation pipe production enterprises have achieved rapid and rapid development. It has become the production and processing center, procurement center and important international trade distribution center and supply place of the world's polyurethane prefabricated insulation pipe manufacturers and global polyurethane prefabricated insulation pipe manufacturers. However, as far as the whole industry is concerned, the imbalance of development is still a prominent contradiction in the industry. There are problems such as extensive development patterns, backward equipment and technology, excess of low-end products, and insufficient high-end products. Industry concentration is low, small, many, scattered, weak industrial structure is still the focus of future adjustment. The task of changing the development model of polyurethane prefabricated insulation pipe manufacturers is arduous. To sum up, five major changes are necessary. 1. From extensive to dense. Change the original industry small, many, weak, scattered state, improve product processing capacity, enhance manufacturing equipment, technology, create brands, and take a dense development path. The core of the extensive transformation to intensive transformation is to improve product processing capacity and quality level, and take the road of independent innovation and independent brand development. From labor-intensive to technology-intensive. Labor-intensive industries can also introduce technologies such as modern electronic information into the industry. The hardware industry has a wide variety, each with its own characteristics, take the technology-intensive road, improve the technical content of products, increase added value, and develop the high-end market in depth. 3. Simple cargo ladder from quantity to quality improvement. At present, the status quo of industrial homogenization and low-level repetitive labor has not been improved. To realize the transformation from big producing countries to strong producing countries, we must overcome the current situation of surplus low-end products and insufficient high-end products. 4. From low cost and low price to high added value and high profit margin. Low-price competition between peers is an act that hurts the industry and loses both sides. In order to compete technically, the industry should start with the connotation and added value of the product itself to gain the favor of the market, thereby maintaining an orderly and healthy ecological environment. Exports will focus on OEM, and gradually increase the proportion of independent brands. It is necessary to further strengthen the unloading platform, consolidate and expand the international market, increase the development of the domestic market, take two legs, and take into account the domestic and foreign markets. OEM production is mainly 3.1 line orders, processing and delivery, lack of market-leading power and bargaining power. Therefore, it is necessary to establish independent brands, gradually increase the proportion of independent brand exports, and enhance international competitiveness.

2018-12-07

Polyurethane directly buried insulation pipe manufacturing industry is developing rapidly in China

In the past ten years, the direct burial of polyurethane directly buried insulation pipe has developed rapidly in China and has become the main laying method of heating pipe network. The direct burial of the so-called polyurethane directly buried insulation pipe is to directly bury the polyurethane directly buried insulation pipe in the soil without laying pipes in the building trench. Compared with trench laying, directly buried polyurethane insulation pipe has the following advantages: 1. There is no need to build trenches, and the number of earthwork and civil engineering is very small; pipeline prefabrication, small on-site installation, and fast construction progress can save heating The investment cost of the pipe network. 2. Small footprint, easy to coordinate with other underground pipelines and facilities. When the old city, narrow streets, dense underground pipes, this advantage is more obvious. 3. The polyurethane directly buried insulation pipe is tight, it is difficult to penetrate between the water retaining material and the steel pipe, and the pipe is not easy to corrode. According to foreign materials, it is believed that the service life can be guaranteed for more than 50 years, which is much higher than the groove. 4. As a heat insulation material, the thermal conductivity of polyurethane is small, the heat loss of the heating tube is less than the heat loss of the groove, and the heat transfer efficiency is high. 5. The polyurethane directly buried insulation pipe has a simple structure and is prefabricated in the factory, which is convenient to ensure the quality of the project. It is precisely because of the above reasons that the manufacturing industry of polyurethane directly buried insulation pipe is developing rapidly in China, and there is still more room for development in the future. During the "Twelfth Five-Year Plan" period, the compound annual demand growth rate of directly buried insulation pipes is expected to exceed 60%. China's external wall insulation market demand will explode in the next three years, or the global MDI industry operating rate increased to 83%. Directly buried insulation pipe material has excellent thermal insulation, water absorption resistance, tensile strength and compression resistance. We expect that the proportion of directly buried insulation pipes in insulation materials will increase from 10% in 2011 to 36% in 2015. The compound annual growth rate is expected to exceed 60%. From 2011 to 2015, the external wall insulation market is expected to bring about 500000 tons of MDI new demand (2011 - 2015 demand is 3,5,8,13,210,000 tons respectively). The outbreak of demand in China's external wall insulation market will accelerate the operating rate of the global MDI industry in the next three years. It is expected that the global industrial operating rate will increase from the current 74% to 83% by 2015, and the upward trend of the industry will be strengthened. We believe that the exterior wall insulation industry will usher in an excellent development opportunity. It is expected that the directly buried insulation pipe will resume explosive growth, and the compound annual growth rate of demand will exceed 60%.

2018-12-07

Polyurethane foam insulation spiral steel pipe manufacturers shape industry quality, open quality market

Hebei Longdu Pipeline understands that polyurethane foam insulation spiral steel pipe manufacturers have shaped the quality of the industry, and the construction of prefabricated directly buried insulation pipe is more convenient and safer to open up the market with quality. What method can better play the role of prefabricated directly buried insulation pipe? Of course, it is easy to use and safe. Today, the small series will tell you. In addition to the high-temperature prefabricated directly buried insulation pipes produced outside China, there are leak alarm lines. Once the pipeline leaks somewhere, the transmission of the alarm line can show the accurate leakage of water and water leakage on special inspection instruments. The location and extent of the leak, so as to notify the inspectors to quickly deal with the leaking pipe section to ensure the safe operation of the heating network. Domestic insulation pipes are currently equipped with leakage alarm lines, and prefabricated directly buried insulation pipes need to fill this blank. High temperature prefabricated direct buried insulation pipe not only has advanced technology and practical performance, but also is difficult to compare with traditional trench and overhead laying pipeline. The high-temperature prefabricated directly buried insulation pipe is composed of steel pipe, glass fiber reinforced plastic inner sheath and glass fiber reinforced plastic shell. Its characteristics are: high-temperature resistant insulation layer, leakage alarm line: when manufacturing high-temperature prefabricated directly buried insulation pipe, the prefabricated directly buried insulation pipe is embedded with alarm line in the insulation layer close to the steel pipe. Once the pipeline leaks somewhere, through the alarm line transmission, it can alarm on the special detection instrument, and display the exact location of the leakage and the degree of leakage, so as to notify the maintenance personnel to quickly deal with the leaking pipe section and ensure the safe operation of the heating network. Lubrication layer, elastic seal. The utility model effectively solves the problems of insulation, sliding lubrication and waterproofing of the exposed pipe end of the prefabricated directly buried insulation pipe, and is suitable for high temperature heat transfer of 130 ℃ ~ 600 ℃ in urban central heating. Prefabricated direct buried insulation pipe also has significant social and economic benefits, but also a powerful measure of heating energy. The adoption of directly buried heating pipeline technology shows that the development of heating pipeline technology in China has entered a new starting point. With the further improvement and development of this advanced technology, the trench and overhead of the heating pipe must be directly replaced. With the expansion of the application scope of prefabricated directly buried insulation pipe, people begin to pay attention to how to use it more safely and conveniently. Now, if you remember the small plait, you can use prefabricated direct buried insulation pipes. In the construction process of prefabricated directly buried insulation pipe, the most difficult and most difficult problem is the construction of prefabricated directly buried insulation pipe. But many construction workers aren't sure how to handle the unexpected. Today, editor Rong Bangxiao takes on-site measures to deal with some problems that often occur on the construction site. 1. What are the methods for filling directly buried plastic casing steel prefabricated insulation pipes on site? The main function of the port is to closely connect the gap with the mother pipe to achieve the purpose of sealing and waterproofing. It is recommended to use the following two methods: 1, the diameter is less than 500mm, the sleeve filling method is convenient to operate and the cost is low; 2 the diameter is greater than 500mm, the electric heating sleeve filling port is used, although the cost is higher, but the engineering quality is more guaranteed. 2. How is the sleeve operated on site? The sleeve is usually determined according to the type of mother tube and the length of the mouth. Generally, the diameter of the sleeve is larger than the diameter of the mother tube and the length is about 20-30cm longer than the length of the mouth. For example, the length of a 180mm diameter insulating tube is 30cm, and the diameter of the sleeve is usually 190mm and the length is 50-60cm. Specific operation steps: 1 Before welding the steel pipe, put the casing into the pipe. After welding the steel pipe, slide the sleeve to the mouth. The balance is roughly the same at both ends. Both ends are sealed with heat shrinkable tape. 2 Open at one end of the sleeve. 30mm diameter injection hole and same end o

2018-12-07

Application and Development Status of Polyurethane Foam in Various Industries

In recent years, polyurethane foams have gradually broadened their application fields due to their good properties, and they are increasingly favored by most material manufacturers. The demand for rigid polyurethane foams is growing at a faster rate. The average annual consumption growth rate in 2005 - 2010 was 16 per cent. In 2015, the global polyurethane foam market demand was 9.46 million tons and is expected to reach 12.74 million tons by 2024. The CAGR from 2016 to 2024 is 3.3 percent. Let's take a closer look at the application and development of polyurethane in various fields. Polyurethane foams are made from polymerized foam isocyanates and hydroxyl compounds. According to its hardness, it can be divided into soft and hard, of which soft is the main variety. Generally speaking, it has excellent elasticity, flexibility, elongation and compressive strength; good chemical stability, resistance to many solvents and oils; excellent wear resistance, 20 times larger than natural sponge; and excellent processing properties, such as sex, heat insulation and adhesion. The emerging economies of China and India are the main consumers of polyurethane foam, which is characterized by abundant supply of raw materials and rapid expansion. Application of Polyurethane in Coatings Polyurethane technology began in Germany. In 1937, Mr. OttoBayer invented polyurethane, laying the foundation for polyurethane chemistry and developing polyurethane technology suitable for different applications. Since 1955, Bayer has used various monomeric and polymeric isocyanates, polyesters, polyethers and acrylates in the production of polyurethane coatings. In 1965, anti-fading two-component polyurethane coatings were applied to aircraft and train fuselages; Bayhydrol®Used as an aqueous film-forming material in 1987; Bayhydur®and Bayhydrol®It was put into use as a two-component polyurethane aqueous solution system in 1994. Polyurethane coatings dominate the wood coatings industry, accounting for 75% of the market, followed by automotive refinish paint, accounting for more than 40%. Polyurethane technology is also more and more widely used in anti-corrosion coatings, plastic coatings and automotive raw paint, accounting for 10% of the market. In recent years, polyurethane coatings have grown at a rate of 15%. The application of polyurethane foam in building insulation In 2014, the construction industry accounted for 1/4 of the total transactions. Increases in construction costs coupled with regulatory intervention are expected to continue to drive growth in the sector. With the continuous expansion of the building insulation and energy saving market, the demand for polyurethane rigid foam is expected to usher in explosive growth. Polyurethane rigid foam is mostly closed cell structure, good heat preservation effect, light weight, high specific strength, convenient construction, etc. It also has sound insulation, shockproof, electrical insulation, heat resistance, cold resistance, solvent resistance and other characteristics.. Insulating materials for insulating materials for refrigerators and freezers, freezers, refrigerated vehicles, buildings, storage tanks and pipes, and small amounts of insulating materials for non-insulating applications, such as imitation wood and packaging materials. Generally, the lower density polyurethane rigid foam is mainly used as a thermal (insulating) material, while the higher density polyurethane rigid foam can be used as a structural material (such as wood). The New York-based company Voodoo has introduced a new thermoplastic polyurethane (TPU) fiber NinjaFlex that expands its fiber range by adding fully elastic and semi-elastic thermoplastic polyurethanes. It is reported that the material is very suitable for 3D printing. The main commercial range of this material includes seals, plugs, textiles, hoses and other functional parts that require elasticity in order to function well. Due to its high tension, it is not easy to change the strength, wear resistance, and it is not easy to damage in contact with the oil surface. This is the traditional disadvantage of rubber. It is also easy to recycle and relatively environmentally friendly, which is an increasingly important factor in this day and age. The unique advantages of polyurethane foam make it a darling in the automotive and medical fields, because these two fields usually require a large number of gaskets and hoses. Due to its durability and flexibility, it is also a very popular shoe material. It is not surprising that it works well for rubber dinghies and other inflatable objects. At present, the price of polyurethane foam is relatively high. It is believed that with the advancement of technology and the development of various industries, the cost of polyurethane rigid foam materials will be effectively reduced, and the application of polyurethane rigid foam materials will become more popular.

2018-12-07

Polyurethane insulation pipe market demand is increasing

China's pipeline market demand is growing and growing fast. The emergence of this situation is mainly caused by the following reasons: 1. China advocates the need for energy conservation and environmental protection policies, such as "central heating", "cogeneration of heat and power" and "triple supply"; 2. The high demand for energy conservation and environmental protection in accelerating the modernization of civilized city construction; 3. In order to improve the quality of life of the people, the country's heating range extends from the serious "three north" areas (I. e. North China, Northeast China, Northwest China) to the "transitional areas" in the vast winter ", cold hot summer. Demand. We have made great progress in research, development, application and so on: in order to meet the rapid development of directly buried steam pipeline, China's vast number of scientific and technological personnel, manufacturers in directly buried steam pipeline technology research, development, application, etc., paid a lot of efforts and made great progress. The diversity of insulation structures and the choice of materials, the scale of engineering practice, no country in the world can compare with us. Companies in Germany, Bruges, Soksam, Italy and the United States have a general diameter of Φ500mm and a small number. At present, the directly buried steam pipelines in Jinan, Shandong, Shijiazhuang, Hebei, Xi 'an, Shaanxi, Dalian, Henan, Jiangsu and Zhejiang provinces in China exceed Φ500mm, and some of them have reached Φ900mm. The insulation structure has an internal sliding and an external sliding. The high-resistance materials selected include microporous calcium silicate, glass wool shell, hot-pressed perlite, silica bead insulation and composite silicate. Insulation structure type, many kinds of insulation materials. Therefore, in the field of development and application of directly buried steam pipelines, China's development diameter is more closely integrated than the development of directly buried insulation pipes from the development of medium steel pipes, polyurethane rigid foam insulation and glass fiber reinforced plastic outer sheath (glass fiber). It has good mechanical strength and excellent corrosion resistance. The first layer: working steel pipe layer, according to the design and customer requirements, generally use seamless pipe (GB8163) spiral welded pipe (GB9711;SY/T5038) and straight seam welded pipe (GB3092). After the surface of steel pipe is treated by advanced shot peening derusting process, the derusting grade of steel pipe reaches Sa2 grade of GB8923 standard, and the surface roughness of GB6060.5 standard can reach R = 12.5 microns. After the surface of the steel pipe is decontaminated and rusted, a layer of anti-corrosion material is applied. The first function is waterproofing, and the other is to improve the bonding surface between the insulation layer and the steel pipe to form a whole. Second layer: a polyurethane insulating layer formed by injecting a rigid polyurethane foam stock solution into a cavity formed between a steel pipe and a special steel mold with a high-pressure foaming machine. This is commonly referred to as the "mold foaming process". Whether the polyurethane foam is full or not, there are quality problems in direct inspection. Its function is to be waterproof, but to keep warm, and the third is to support the weight of the heating network. When the temperature of the conveying medium is − 50 ° C. to 120 ° C., a rigid polyurethane foam is used as the insulating layer, and when the temperature of the conveying medium is − 50 ° C. to 150 ° C., a rigid polyurethane is used. The foam is made of an insulating material. Polyurethane directly buried insulation pipe, also known as "pipe in pipe", is composed of a "two-step method" and is composed of a high-density polyethylene outer protective layer, a polyurethane rigid foam plastic pipe and a steel pipe. The insulation material is rigid polyurethane foam with a density of 60kg/m3 ~ 80kg/m3, which fully fills the gap between the steel pipe and the casing, and has a certain bonding strength, so that the steel pipe and the shell insulation layer are between the three. Form a solid whole. Polyurethane directly buried thermal insulation pipe foam has good mechanical properties and thermal insulation performance. Generally speaking, it can withstand a temperature of 120°C, and can withstand a temperature of 180°C through modification or combination with other insulating materials. An overview of heating and work adapted to urban areas.

2018-12-07

New thermoplastic polyurethane fiber fun 3D printing industry

It is reported that the NinjaFlex has 12 colors, can produce a variety of elastic marks, can stretch to absorb multiple shocks without degradation. Thermoplastic polyurethane bridges rubber and plastic, providing a new size for printing, suitable for various applications that simple polylactic acid or copolyester cannot achieve. Even if possible, the finished product is not as effective as the thermoplastic polyurethane. The main commercial range of this material includes seals, plugs, textiles, hoses and other functional parts that require elasticity in order to function well. Due to its high tension, it is not easy to change the strength, wear resistance, and it is not easy to damage in contact with the oil surface. This is the traditional disadvantage of rubber. It is also easy to recycle and relatively environmentally friendly, which is an increasingly important factor in this day and age. All these unique advantages make it a darling in the automotive and medical fields, because these two fields usually require a lot of gaskets and hoses. Due to its durability and flexibility, it is also a very popular shoe material. It is not surprising that it works well for rubber dinghies and other inflatable objects. JonathanSchwartz, founder and product operating officer of Voodoo, said: "We are very pleased that thermoplastic polyurethane has expanded our market by 50%. I think we will witness many new and creative applications of thermoplastic polyurethanes realized through our services. In the past few months, we have been testing the application of thermoplastic polyurethane fiber in 3D and found a way to make this material more popular and more reliable."

2018-12-07