China Guangzhou Donoyo Chemical Co., Ltd Company Cases

  In the liquefied natural gas storage and transportation environment of minus 196℃, a foam material called polyisocyanurate (PIR) is quietly guarding the country's energy security. With an ultra-high closed-cell rate of more than 90%, this modified polyurethane material has shown irreplaceable advantages in the field of low-temperature pipeline insulation. Its thermal conductivity remains stable in a cryogenic environment, and its energy saving rate is increased by more than 30% compared with traditional materials, making it a core supporting material for equipment manufacturing companies such as CIMC Enric. With the accelerated construction of China's LNG receiving stations, the localization process of PIR is ushering in a golden period of development.     Standard certification is the technical cornerstone for opening up the international market. At present, the three major standard systems of EU EN 14308, US ASTM C591 and China GB/T 39936 have jointly constructed a quality assessment framework for PIR materials. These standards impose strict requirements on performance in a wide temperature range of -200℃ to 200℃: Taking the SY/T 7350 low-temperature insulation specification as an example, the material must pass the -165℃ protective hot plate method to test the thermal conductivity, and at the same time meet moisture-proof indicators such as short-term water absorption ≤3% (EN 1609 standard). Leading domestic companies such as Yantai Wanhua have passed the UKCA certification in the UK, and their on-site spray PIR system meets the fire protection requirements of EN 14320-1 for fuel pipeline insulation, paving the way for entering the European infrastructure market.     Process innovation continues to release the application potential of PIR. Traditional block foam products require complex cutting in the construction of special-shaped pipelines, while on-site spraying technology uses special equipment to spray the mixed liquid directly onto the surface of the metal pipeline, and forms a seamless insulation layer after foaming. A case of an engineering company in Shanghai shows that this technology has increased the insulation construction efficiency of LNG ship pipelines by 50% and eliminated the cold bridge effect. What is more noteworthy is that the oxygen index of modified PIR foam can reach more than 32% (EN ISO 1182 test), far exceeding ordinary flame retardant materials, which makes it quickly replace rock wool products in explosion-proof scenarios such as oil storage tanks.     Facing the goal of carbon neutrality, the PIR industry chain is building a green closed loop. The bio-based isocyanate developed by the Nanjing R&D team reduces the carbon footprint of raw materials by 40%; and the recycling technology of Guangdong companies can convert building demolition waste into insulation filling particles. These breakthroughs are in line with the new sustainability requirements of the EU CPR regulations for building products, and are also a strategic path to circumvent the UKCA certification trade barriers in the UK. It is estimated that PIR products using 30% recycled materials can reduce carbon emissions by 1.8 tons per ton, which is of great significance to the carbon emission reduction of terminal application products such as elevator room insulation boards and cold chain logistics boxes.     To win the international competition, domestic brands need to make breakthroughs in three dimensions: deepen the cooperation between industry, academia and research to develop ultra-low temperature foaming formula, participate in the revision of ISO 9229 international standard to gain the right to speak, and build a technology-based brand image through digital platforms such as Fanke website building - just like the official website of an environmental protection technology company uses dynamic process demonstration to intuitively show the advantages of PIR closed-cell structure, and the number of overseas inquiries increased by 200% in half a year. When China's manufacturing shifts from cost advantage to technology narrative, hidden champion materials such as PIR will reshape the global industrial landscape

  In the field of industrial insulation, polyisocyanurate (PIR) foam is reshaping industry standards with disruptive performance. Its closed-cell rate exceeds 90%, and its thermal conductivity is as low as 0.022W/(m·K), which is 30% more energy-saving than traditional polyurethane, and its fire protection level reaches the highest certification standard of EN 13501-1. This material remains structurally stable under high temperature conditions of 200°C, making it a core solution for oil and gas pipelines and ultra-low temperature cold storage. Chinese companies' innovation focuses on three major directions: In terms of fire protection performance upgrades, a material company in Guangdong has increased the oxygen index of PIR insulation board to 32% by adjusting the isocyanate ratio, and passed the B1 certification of the National Fireproof Building Materials Inspection Center; in the field of circular economy practice, Shandong manufacturers have converted 100% of injection molding scraps into PIR recycled particles for the manufacture of fire duct brackets, reducing raw material costs by 40%; in international certification breakthroughs, Jiangsu companies have won British infrastructure orders with UKCA-certified PIR insulation boards, with profit margins increasing by 18%. The implementation of the new building energy conservation regulations, "General Specifications for Building Energy Conservation and Renewable Energy Utilization", has further stimulated the market explosion. The heat transfer coefficient limit of the wall of the cold chain logistics center has been reduced to 0.38W/(㎡·K), and the strictness of the standard has been increased by 40%. A leading cold storage board company has introduced a fully automatic production line from Europe, with an annual output of 2.5 million square meters of PIR boards. Its graphene-enhanced formula increases the compressive strength by 30%, and has been successfully applied to the Sinopec oil storage tank project to reduce energy consumption by 40%. When industrial pipelines are wrapped with a PIR insulation layer with a closed-cell rate of over 90%, this material revolution is reconstructing the energy-saving gene of Chinese manufacturing from the depths of the industrial chain.

  In the field of industrial insulation, polyisocyanurate (PIR) foam is rewriting the rules with disruptive performance. Its closed-cell rate exceeds 90%, and its thermal conductivity is as low as 0.018W/(m·K), which is 30% higher than that of traditional polyurethane insulation, and its fire protection level reaches the highest standard of EN 13501-1. This material remains stable at high temperatures of 200°C, making it the preferred solution for oil and gas pipelines and ultra-low temperature cold storage.     Innovation of Chinese companies focuses on three dimensions:     Fire protection upgrade: By adjusting the ratio of black and white materials, the fire protection level of PIR insulation board is upgraded to B1. Taking a Guangdong energy-saving material company as an example, the increase of 23% in the use of black materials has made the product oxygen index exceed 32%, and it has passed the inspection of the National Fireproof Building Materials Inspection Center;     Circular economy: 100% of the injection molding scraps are converted into PIR recycled particles. A Shandong manufacturer uses this to manufacture fire duct brackets, and the raw material cost drops by 40%;     International certification: In 2024, the export of PIR insulation boards certified by UKCA to the UK surged. Jiangsu companies won British infrastructure orders with this qualification, and the profit margin increased by 18%.     The new regulations on building energy conservation have further stimulated the market blowout. According to the "General Specifications for Building Energy Conservation and Renewable Energy Utilization", the heat transfer coefficient limit of the wall of the cold chain logistics center has been reduced to 0.38W/(㎡·K), which is 40% stricter than the original standard. A leading cold storage board company introduced a fully automatic production line from Europe, with an annual output of 2.5 million square meters of PIR boards. Its graphene-enhanced formula increases the compressive strength by 30%, which has been successfully applied to Sinopec's oil storage tank project, reducing energy consumption by 40%25. When refinery pipes are wrapped with a PIR insulation layer with a closed-cell rate of over 90%, this silent material revolution is reshaping the energy-saving genes of Chinese manufacturing from the depths of the industry.

  In electronic manufacturing workshops, the scraps squeezed out of injection molding machine nozzles were once considered waste, but now they have become treasure raw materials for high-end engineering plastics - this is the value leap of PIR (pre-consumer recycled) materials. Unlike PCR plastics recycled after consumption, PIR comes from uncirculated waste such as defective products and sprue materials on factory production lines. It has a single component and its performance stability far exceeds that of mixed recycled materials4. The 40% glass fiber reinforced PIR recycled PPS resin launched by Polyplastics uses an exclusive "re-blending" process to remove 100% of metal impurities, and then scientifically compounded with new materials. While reducing the carbon footprint by 30%, it has passed the UL94 V-0 flame retardant certification equivalent to virgin materials and has been used in new energy vehicle battery brackets and 5G base station precision components26.   The technological breakthroughs of Chinese enterprises are also impressive: Cangzhou Dahua uses the scraps produced by the continuous process of silicon copolymer PC to develop a high-flow PIR alloy with a silicon content of 20% and a low-temperature toughness retention rate of over 80%; Dongguan Hongshao New Materials innovatively uses 30% marine recycled PET to modify PC, solves the compatibility problem through cycloalkyl compatibilizers, reduces the carbon footprint by 34% and obtains UL Ecologo certification37. The core advantage of PIR materials lies in the short-chain circulation model of "local production-local consumption". Shanghai Chunyi New Materials, relying on the Yangtze River Delta electronic industry cluster, crushes and granulates the factory injection molding waste within 48 hours, and directly supplies it to surrounding connector companies, with a cost 25% lower than imported materials. This closed-loop model not only responds to the mandatory requirements of the EU ELV regulations for recycled plastics, but also achieves an annual reduction of 12,000 tons of carbon dioxide emissions in Tesla's supply chain. When Lotte Chemical's PIR-grade PC alloy is injection molded on a 0.25mm ultra-thin connector, Made in China is refining "green gold" from waste materials

  Consumer electronics brands are actively implementing environmental protection commitments. Lenovo, Acer, and Dell all plan to achieve a 30%-100% recycled plastic ratio in their products between 2025 and 2035. However, PCR materials have long restricted the appearance design of high-end electronic products due to batch color differences and foreign matter mixing. In 2023, Acer's "Future Hummingbird" environmentally friendly laptop computer will use a 30% PCR material body for a breakthrough, and the recycled impurities will be transformed into aesthetic elements through Teijin's "sprinkle style design" technology-precisely controlling the diameter of the different-color dots to within 0.2mm, so that the spray-free shell has both starry sky texture and scratch resistance, and each unit reduces carbon emissions by 21%.   The core of this technology lies in molecular-level innovation: Teijin's polycarbonate sprinkle color system can transform the different-color particles that are traditionally regarded as defects into design language by adjusting the dot diameter distribution, and simultaneously solve the problems of appearance consistency and VOC emissions, and increase the yield rate by 15%. The high-precision biting process on the mold surface further enhances the scratch resistance and avoids the spraying process. At present, brands such as Huawei and Xiaomi are following up quickly, promoting the upgrade of PCR applications in the electronics industry from structural parts to appearance parts. Huitong Co., Ltd. has developed gray-white ABS, black PC and other PCR modified materials with the integrated platform of "resin polymerization-modification  empowerment", providing recycling solutions for TV housings and air-conditioning components. In 2024, overseas business surged by 172%, and the production of the Thailand factory accelerated the coverage of the Southeast Asian market.

  Traditional recycled plastics are difficult to meet the strict standards of the automotive industry due to their high impurity content and performance degradation. Haier Recycling relies on the country's largest waste home appliance recycling network and Qingdao Interconnected Factory, and through the industry's top sorting and cleaning technology, it achieves 100% removal of metal impurities, impurity content

Recently, Google and Dow Chemical announced a groundbreaking collaboration to use artificial intelligence (AI) technology to break the technical bottleneck of film and flexible packaging plastic recycling. This collaboration is expected to help process 70,000 tons of plastic waste that is currently almost impossible to recycle each year. According to reports, the collaboration plans to use the huge plastic database built by Google, combined with machine learning and molecular vision technology, to train the AI ​​system to identify the molecular composition of plastic packaging at millisecond speeds and perform high-precision classification. Dow's material science capabilities have become an important support for this system. Through the cooperation between the two parties, a technological breakthrough has been achieved in the proof-of-concept stage: AI can not only identify the types of complex materials, but also predict their composition ratios, which creates new possibilities for automatic sorting in recycling centers and the production of high-quality recycled raw materials. Currently, the system has been put online for testing in Oregon, USA. During the test, the sensors provided by Google combined with AI algorithms to perform real-time molecular-level identification and sorting of plastic flows, significantly improving recycling efficiency and accuracy. Dow provides actual material samples and application data to assist in optimizing AI algorithms and improve their practicality and generalization capabilities. In addition, Dow recently acquired Circulus, a plastic recycling company, further strengthening its influence in recycling infrastructure and laying a solid foundation for the practical application of this AI system. "By combining Dow's deep accumulation in materials science with Google's advanced AI technology, we hope to completely change the way plastics are recycled." said Zhang Han, global sustainability director of Dow Packaging and Specialty Plastics. The relevant person in charge of Google X Lab also emphasized that in the next few months, it will continue to deepen cooperation with Dow to promote the commercialization and large-scale application of the system and realize a true closed-loop cycle of soft plastics.

TIME：April 7, 2025 Postconsumer recycled content that can be used in new food and beverage packaging still faces obstacles to widespread use. Companies like Nova Chemicals and Atlantic Packaging are trying to leverage B2B closed loops to increase supply. Some states have also passed laws mandating minimum levels of recycled content in certain types of packaging. There’s also some evidence that the shift to more PCR use could win brands favor with customers. In a recent Nova Chemicals consumer insight survey, three-quarters of respondents agreed that companies ought to increase their use of packaging made from recycled materials. But there are barriers to achieving this ubiquity, and industry participants lament imbalances in the recycled plastics economy. “One of the issues that I see is a real disconnect between supply and demand,” said Crystal Bayliss, who leads the PCR workstream at the U.S. Plastics Pact. She said that procurement teams need to think about the long term, working with converters to establish a supply of the PCR grades they need. It’s a pressing issue: A recent study by Closed Loop Partners highlights an increasing demand for food-grade polypropylene, citing infrastructure challenges as a key barrier to increasing supply. Today, food-grade PCR is most often found in the form of recycled PET in soda and water bottles. Many companies include recycled content targets among their voluntary packaging sustainability goals, though progress toward those goals has varied. A recent report from Smithers noted that 1.2 million metric tons of food-grade PCR was used for packaging in 2024. That’s up 9% from 2019 and “driven by strong demand in end-use sectors such as food and drinks, as well as greater emphasis on the use of recycled material in the manufacture of plastics packaging,” the report said. And a 2023 McKinsey & Co. report said that “if brands with public recycled-content commitments follow through on their plans, the U.S. demand for recycled polyethylene terephthalate (rPET) in 2030 would outpace supply by about three times.”