About Wanhua Cold Storage
Application of Polyurethane Materials in Cold Chain Logistics
Polyurethane Material Properties
Polyurethane foam is a thermosetting flame-retardant foam mainly formed by mixing and foaturing polymethylene polyphenylene isocyanate (commonly known as black material) and combined polyether (commonly known as white material) under suitable process conditions. It has many excellent physical and chemical properties.
Polyurethane foam reaction schematic diagram:
- Convection: The closed-cell structure of rigid polyurethane foam prevents convection;
- Conduction: The foaming gas enclosed in the cells has an extremely low thermal conductivity;
- Radiation: The honeycomb structure effectively reflects and absorbs various forms of energy.
Good fire resistance
Polyurethane is a thermosetting material. When exposed to fire, it forms a carbonized layer on the surface, preventing the fire from spreading inward. Its fire rating can reach B1 (oxygen index ≥ 30%).
Class B1 polyurethane
Class B1 polystyrene board
- Polyurethane itself is an excellent adhesive.
During World War II, polyurethane was used to bond the tracks and rubber of German tanks during retreats.
- "Micro-pore penetration" foaming enables 100% full adhesion to various base layers. (As shown in the figure on the right)
Quality of Wanhua
① The world's largest supplier of MDI with an annual output of 2.1 million tons.
② The only polyurethane manufacturer in China with independent intellectual property rights for MDI.
③ The only supplier of two-component polyurethane raw materials (black material + white material) in China.
Wanhua Energy Saving Technology - Black Material Wannate 2208
Product Introduction:
Wannate 2208 is mainly composed of polymeric polymethylene polyphenylene isocyanate, and contains no water. It is used together with the white material Wanefoam series, with excellent matching performance, and can produce solid foam with outstanding properties.
Packaging Specification:Red iron drum, 250 kg per drum.
Storage Notice:
Wannate 2208 easily reacts with air and water to form urea crystals. Please store it in a sealed, light-proof environment at 20–25 °C.
Wannate2208 Product Ingredient List | ||
Project | Indicators | Execution standard number |
Appearance | Dark brown liquid | Judging by appearance |
Viscosity at 25℃, mPa.s | 150~250 | GB12009.3 |
-NCO（Wt） | 30.2~32.0 | GB12009.4 |
Density, g/cm3 | 1.22~1.25 | GB4472 |
Acid content (% as measured by HCl) | ≤0.05 | GB12009.5 |
Hydrolyzed chlorine (%) | ≤0.2 | GB12009.2 |
Product Description:
Wanefoam series is a fast-curing system, mainly composed of polyether and polyester polyols, flame retardants, foaming agents, etc. When used in combination with Wannate 2208, it can produce solid foam with excellent performance and can be applied on most substrates.
Wanefoam Product Series Ingredient List | ||
Component names | %（w/w） | CAS No |
Polyether/Polyester Polyol | 30-60 | 9082-00-2/32472-85-8 |
Flame Retardant | 10-40 | 13674-84-5 |
Emulsifier | 1-3 | -- |
Tertiary Amine Catalyst | 1-5 | Mixture |
Other Additives | 1-10 | Mixture |
Composition Comparison of Polyurethane White Material
White base material main raw materials | Wanhua Energy Saving Technology | Other small manufacturers | ||
Main components | Source of raw materials | Price range | Source of raw materials | Price range |
Polyether/Polyester polyol | Produced by Wanhua/ Nanjing Stepan | 19,000–22,000 RMB/ton | Small manufacturers Recycled polyether | 7,000–8,000 |
Foaming agent | Zhejiang Sanmei (141b system) | 23,000–24,000 RMB/ton | Small factory 141b, Freon F1 | 11,000–13,000 |
Flame retardant | Zhejiang Wansheng / Yangzhou Chenhua | 19,000–21,000 RMB/ton | Small manufacturers, additive flame retardants | 8,000–9,000 RMB/ton |
Blending agent (silicone oil) | Evonik, Mita | 50,000–60,000 RMB/ton | Small manufacturer | 20,000–25,000 RMB/ton |
Catalyst | Evonik | 30,000–40,000 RMB/ton | Small manufacturer | 10,000–15,000 RMB/ton |
Total price difference: ￥2,000–4,000 per ton
If the quality of polyether/polyester is not up to standard, problems such as foam aging, embrittlement, poor adhesion, and cracking may occur.
Blowing agents: environmentally friendly (141b) and non-environmentally friendly (F11, etc.)
Function: adjust reaction rate and promote foam expansion.
Flame Retardants
The polyurethane system materials for cold chain applications by Wanhua adopt reactive flame-retardant polyether and part of additive flame retardants, which endow the polyurethane foam with excellent performance and good stability.
Tested by authoritative institutions (in accordance with GB50016-2014), the product has outstanding flame retardant performance, ensuring compliance with the flame retardant requirements of the construction and cold chain industries.
Flame retardancy of polyurethane is critical to the safety of cold storage.
Poor flame retardancy of the white material results in: substandard oxygen index and poor fire performance.
June 3 Jilin Dehui Poultry Company Fire Accident
Fire broke out at the construction site of Harbin Yulongwan Community
Silicone Oil (Foam Stabilizer)
- Reduces the surface tension of raw material components;
- Enhances miscibility between raw materials;
- Stabilizes the foaming process;
- Foam stabilizers play a crucial role in producing fine and uniform foam cells.
The field of cold chain logistics
Wanhua Product Features | Other small manufacturers: |
Custom-made (tailored to the specific needs of different customers) | Single formula |
Dimensional stability | Only pursue high yield volume to save costs |
No secondary on-site operation required | On-site secondary addition (unstable product quality) |
High flame retardancy and low-temperature construction applicability | Poor flame retardant effect |
Grade / Physical Property Index | Wanefoam 6000 Series |
Applicable Cold Storage Type | Suitable for temperatures from 25℃ to -45℃, customized according to different types of cold storages and customer requirements. |
Molded Foam Core Density, kg/m³ | 35–60, customized according to different types of cold storages and customer requirements. |
Ambient Service Temperature, ℃ | ＞10 |
Shelf Life, months | 6 |
Oxygen Index, % | ≥26/≥30 |
Foam Thermal Conductivity, W/(m·K) | 0.017——0.024 |
Foam Compressive Strength, kPa | 150——550 |
Foam Water Absorption, % | ≤1 |
Dimensional Stability at -30℃, % | ≤1 |
Closed Cell Content | ≥95% |
Flame Retardancy | National Standard Class B2/B1 |
Note: Some specifications of this product can be adjusted according to actual requirements. The values provided herein are typical experimental data; actual data may vary slightly due to environmental conditions. For our products, the listed data shall not be legally binding.
R&D Strength
China's only national-level polyurethane research laboratory.
Customized Product Service
Professional Construction Technical Team
Wanhua has a professional service team that provides one-stop services ranging from preliminary project planning and design to later construction.
Wanhua’s engineering company has undertaken insulation projects for many large-scale projects at home and abroad.
Combined with first-class insulation materials and a first-class construction technical team, we will bring you satisfaction beyond expectations.
Introduction to Wanhua Engineering
List of Partial Project Achievements of Wanhua
Project Name | Construction Scale | Contract Amount | Construction Time |
Cold Storage Insulation Project of Foshan Puying Cold Chain Co., Ltd. | 200,000 tons | 29.81 million | 2021.6 |
Jiangxi Supply and Marketing (Xinfeng) Cold Chain Logistics Park | 60,000 square meters | 39.96 million | 2021.3 |
Guangdong Jinbang Cold Chain Logistics and Warehousing Co., Ltd. | 210,000 tons | 31.22 million | 2020.5 |
Henan Wanbang Phase IV Beef & Mutton Trading Area | 200,000 tons | 28.76 million | 2019.9 |
No.5 Low-temperature Warehouse, Supply Chain Logistics Standard Warehouse, Linyi Comprehensive Bonded Zone | 30,000 square meters | 14.16 million | 2018.6 |
No.2 & No.3 Single Insulation Project of Cold Chain Workshop, Kunming Baoxiang 10,000-ton Cold Storage Logistics Co., Ltd. | 60,000 square meters | 20.40 million | 2018.6 |
Project Name | Construction Scale | Contract Amount | Construction Time |
Cold Storage of Yantai Huada Agricultural Products Cold Chain Logistics Co., Ltd. | 37,055 square meters | 11.90 million | 2021.5 |
Comprehensive Treatment (Reconstruction) Project of Fengman Hydropower Station | 101,134 square meters | 73.49 million | 2015.9 |
Yunneng Industrial Park Project of Hunan Yunneng Investment Management Co., Ltd. | 81,134 square meters | 16.24 million | 2017.12 |
Zhangjiajie Ice & Snow World Ski Hall | 63,322 square meters | 20.00 million | 2018.4 |
Phase I Construction of Changsha Red Star Global Agricultural Products Wholesale Center | 42,546 square meters | 11.80 million | 2017.11 |
Cold Storage Project of Jiangjunshi Operation Area, Zhuanghe Port Area | 59,913 square meters | 10.03 million | 2017.9 |
Quzhou Agricultural Commercial City | 25,987 square meters | 7.38 million | 2016.12 |
Phase IV of Changsha Red Star Cold Storage | 18,653 square meters | 11.80 million | 2014.9 |
Project Name | Construction Scale | Contract Amount | Construction Time |
Zhejiang Aozhou Cattle Industry Imported Beef Slaughter Cold Storage Project | 30,000 square meters | 12.90 million | 2020.5 |
Xinxiang Qianwei Yangchu Cold Storage Spraying Insulation Project | 30,000 square meters | 12.50 million | 2019.5 |
West Chongqing International Trade & Logistics Port Insulation Project | 26,886 square meters | 10.11 million | 2019.3 |
Wanji Refrigeration Co., Ltd. Renovation Project | 35,000 square meters | 12.09 million | 2019.4 |
Hengyang Baishazhou Logistics Park Cold Storage | 22,546 square meters | 7.84 million | 2015.2 |
Quzhou Urban Logistics Complex Phase II | 29,913 square meters | 7.38 million | 2016.12 |
Suzhou Urban Public Distribution Hub Phase II | 57,226 square meters | 22.48 million | 2018.8 |
Qingdao Huitong Fengyuan Supply Chain Cold Storage Insulation Project | 30,000 square meters | 4.70 million | 2020.6 |
Hainan Koweidong Ao Base Cold Storage Insulation Project | 28065平米28,065 square meters | 6.80 million | 2015.9 |
Partial Project Cases of Wanhua
Zhangjiajie Ice & Snow World Ski Hall
Hunan Yunleng No.1 Cold Storage
Linyi Comprehensive Bonded Zone Supply Chain Logistics Standard Low-Temperature Warehouse Project
Chongqing Yuxi International Cold Storage
Dalian Zhuanghe Port Area Jiangjunshi Cold Storage
Zhucheng Delisi Food Cold Storage
Dalian Furizi Cold Storage
Guangdong Jinbang Cold Chain Warehousing Project
HNA Cold Chain Beijing Cold Chain Logistics Center Project
Henan Sinian Food Qianwei Central Kitchen Project
Hunan Hongxing Cold Storage Project
Hunan Kouweiwang Cold Storage Project
Kunming Baoxiang 10,000-Ton Cold Storage Project
Linyi Bonded Zone Supply Chain Logistics Project
HSBC Food USA (Shandong) Dexin Garlic Products Production and Processing Project
Shandong Gaohua Huada Modern Food Industrial Park Project
Taiyuan Tianhe Food Cold Storage Project (Shanxi)
Wanbang International Agricultural Products Logistics Park (Henan)
