Best Solution For Cold Chain Energy Saving And Refrigeration
Materials
Polymer materials with excellent comprehensive performance
Closed-cell structure
The closed cell structure of polyurethane rigid foam can effectively prevent water vapor penetration and enhance the thermal insulation and waterproof properties of the foam; at the same time, the cell wall acts as a foam support skeleton and can provide higher compression and tensile strength.
Flame retardancy
Rigid polyurethane foam is a thermosetting material. It carbonizes when exposed to fire to form a protective layer without producing molten droplets. According to standard requirements, polyurethane foam with flame retardant added will not promote the spread of fire.
Thermal insulation
The thermal conductivity of rigid polyurethane foam can be as low as 0.017W/ (m.K), and it has a closed-cell rate of more than 95%. Its excellent closed-cell structure can effectively reduce the three major heat transfer pathways of convection, conduction, and radiation, thereby maintaining stable heat resistance for a long time.
Self-adhesion
Rigid polyurethane foam belongs to the “microporous infiltration” foaming, which can penetrate into the microscopic pores on the surface of the base layer and quickly start to solidify at an expansion ratio of several to dozens of times, forming a firm bite with the base layer in a microscopic form, greatly increasing the bonding area and significantly improving the pull-out strength.
Durability
Rigid polyurethane foam can be used for a long time in an environment as low as -200℃, and has excellent aging resistance. The performance of polyurethane used in cold storage, refrigerated trucks, and refrigerated equipment can remain stable for a long time.
Dimensional stability
Isocyanate and polyol form a cross-linked network structure during the reaction, so that the foam is dimensionally stable after molding and will not deform over time.
Compression resistance
Rigid polyurethane foam can form an insulation layer with a compressive strength of more than 550 KPa, which can meet the compression requirements of various load-bearing floors and roofs.
Mold resistance
Rigid polyurethane foam has stable chemical properties and low water absorption, which can effectively prevent mold caused by water vapor penetration. Ensure food safety in cold storage.
Comparison of polyurethane and polystyrene board/extruded board floor application performance
Material properties
| Spray rigid foam polyurethane | EPS | XPS | |
| Thermal conductivity W/(m·K) | 0.024 | 0.042 | 0.033 |
| Dimensional stability (70℃, 48h) | ≤1% | ≤3% | ≤1.5% |
| Water absorption | ≤1%~3% (depending on density) | 4.00% | ≤1.0% |
| Compression performance (deformation 10%) | 150KPa-550KPa (depending on density) | 150KPa | ≥250KPa |
| Flame retardant performance | Thermosetting material, insoluble and infusible. After flame retardant treatment, the surface of the fire burns carbonized and does not promote the spread of fire. |
“Thermoplastic materials begin to soften and shrink when the temperature rises above 70°C. They have been flame-retardant treated. When they encounter fire, they burn and produce molten droplets, and the fire spreads with the molten droplets.” |
|
| Self-adhesiveness | Excellent | NO | |
Process characteristics
| Spraying rigid foam polyurethane | EPS | XPS | |
| Bonding area | 100% fully adhered to the ground, no cavity. | The pasting area is 60%-70%, with cavities and horizontal and vertical board seams. It is easy to produce cold and hot bridges. | |
| Cool and waterproof | Fully enveloping spraying operation, no board seams, no condensation in board seams. | There are horizontal and vertical board seams, which easily generate cold and hot bridges and condensation between board seams. | |
Products
Polyurethane cold chain system materials
—The best solution for cold chain energy saving and refrigeration
Product Series
Wanefoam®6011, Wanefoam®6012, Wanefoam®6013, Wanefoan®6000 Series
Mainly suitable for cold chain logistics fields such as freezers, quick-freezers, fresh-keeping warehouses, cold storage panels, refrigerated trucks, tanks, refrigerated ships, etc., and can be applied on many substrates such as cement surfaces, brick surfaces, and wood surfaces, with excellent physical and chemical properties.
System Features
Complete product system
Wanhua has the most authoritative research center in China’s polyoxyester industry. It has different formulas from 10℃ fresh-keeping to -200C cold-keeping, and can also provide special formulas according to customer needs.
Environmentally friendly insulation materials
Wanhua uses environmentally friendly foaming agents, and eliminates the use of fluorinated products that are expressly prohibited by the state as foaming agents, ensuring the purity and environmental protection of products from the source
Safe fire protection system
Wanhua polyurethane rigid foam uses structural flame retardant properties to make its flame retardant effect better, and can ensure that the flame retardant has no significant decline after many years of use.
Extremely long storage period
Wanhua polyurethane cold chain system materials are all produced in large kettles automatically, with good batch stability, long storage period, excellent raw material solubility, and no stratification when standing for a long time.
Strict quality control
Wanhua has a strict quality inspection system. From raw material procurement, entry into the factory to production and delivery, there are strict quality controls. We insist on using raw materials from regular and well-known manufacturers to avoid engineering accidents and extend the service life.
Professional construction technology team
Wanhua has a professional service team that can provide one-stop service from project pre-planning and design to post-construction. Wanhua’s engineering company has undertaken insulation projects for many large projects at home and abroad. The first-class insulation materials and the first-class construction technology team will bring you satisfaction beyond your expectations.
Polyurethane load-bearing spray system material
—Solid and reliable insulation layer
Wanhua Wanefoam®6011 is a product specially developed for cold storage floor insulation, with a compressive strength of up to 550KPa (250KPa can meet the compressive strength requirements of all types of cold storage floors). The unique full-coverage spraying process can effectively prevent the penetration of underground water vapor, ensuring that the normal operation of the cold storage will not be affected by condensation and icing caused by water vapor erosion during long-term use. When traditional insulation materials are laid on the cold storage floor, a large number of bonding seams will be left, burying the hidden danger of underground water vapor penetrating upwards.
| Brand/Material Index | WANEFOAM®6011 |
| Applicable cold storage type | -200℃ to 10℃, customized according to different types of cold storage and customer needs |
| Molded foam core density, kg/m3 | 35-75, customized according to different types of cold storage and customer needs |
| Shelf life, months | 3 |
| Foam thermal conductivity, W/m,K | 0.017-0.024 |
| Foam compressive strength, KPa | Can be as high as 550 or more |
| Foam water absorption, % | ≤1 |
| Dimensional stability, %, -30℃ | ≤0.5 |
| Closed cell rate | ≥95% |
| Note: Some indicators of this product can be adjusted according to actual requirements. The values provided in this article are typical experimental values. The specific data may vary slightly due to environmental conditions. For our company’s products, the listed data are not legally binding. | |
Ground construction process (recommended process example)
Construction preparation-ground leveling-cement mortar-0.3mm thick two-component environmentally friendly cyanide condensation-self-extinguishing hard polyurethane spray-waterproof layer-cement mortar leveling layer-reinforced concrete floor-fine stone concrete-wear-resistant floor
Polyurethane universal spray system material
–High-efficiency and energy-saving insulation layer
Wanhua Wanefoam®6012 and Wanefoam®6013 series products are suitable for thermal insulation spraying construction on the floor, wall, ceiling and roof of various types of cold storage. The thickness required to achieve the same thermal insulation requirements is thinner and the space utilization rate is greater. The on-site spraying process can achieve 100% seamless bonding between the thermal insulation layer and the base layer, completely eliminating the cold bridge and “hot bridge” phenomenon formed by a large number of bonding seams in traditional thermal insulation materials.
| Brand/Material Index | WANEFOAM®6012/WANEFOAM®6013 |
| Applicable cold storage type | -200℃ to 10℃, customized according to different types of cold storage and customer needs |
| Molded foam core density, kg/m³ | 35-60, customized according to different types of cold storage and customer needs |
| Shelf life, months | 3 |
| Foam thermal conductivity, W/m,K | 0.017-0.024 |
| Foam compressive strength, KPa | 150 and above |
| Foam water absorption, % | ≤3 |
| Dimensional stability, %, -30℃ | ≤0.5 |
| Closed cell rate | ≥95% |
| Note: Some indicators of this product can be adjusted according to actual requirements. The values provided in this article are typical experimental values. The specific data may vary slightly due to environmental conditions. For our company’s products, the listed data are not legally binding. | |
Wal coratrucion tectrolbg (example)
Notes
During on-site foaming, the center temperature of the foam can reach 140℃. To avoid foam core burning, the spraying thickness should be controlled during construction and sprayed layer by layer. Years of research have confirmed that when the thickness of a single gun is 25-40mm, the foam square rate and various properties can achieve the best balance. It is recommended that the single thickness should not exceed 40mm.
Cyanide moisture-proof and vapor-proof material
—safe and environmentally friendly moisture-proof and vapor-proof layer
Wanshield®9503 two-component environmentally friendly cyanogen coagulant is a solvent-free, high-solid content polyurethane polymer material. It is cured into a film through the reaction of components A and B to form a moisture-proof and vapor-proof layer with strong adhesion. After curing, the two-component environmentally friendly cyanogen coagulant forms a uniform film. The paint film has good compatibility with polyurethane foam, good bonding strength and moisture-proof and vapor-proof properties, and has good chemical resistance.
| Brand/Material Index | WANEFOAM®9503 | |
| Paint Film State | Even film formation, no bubbles, bulges, etc. | |
| Solid Content (%) | ≥96 | |
| Drying time(h) | Surface dry | ≤12 |
| Dry | ≤24 | |
| Low temperature bending resistance | -35℃, no cracks | |
| Adhesion strength (MPa) | 1 | |
| Water resistance (360 h) | No blistering, no peeling, no cracks | |
| Alkali resistance (20% NaOH, 72 h) | No blistering, no peeling, no cracks | |
| The values provided in this article are typical test values. The specific data may vary slightly due to environmental conditions. For our company’s products, the listed data are not legally binding. | ||
Wall construction technology (recommended technology example)
Precautions
1. The concrete base working surface is absolutely dry, without large honeycomb holes, convexities and other loose phenomena.
2. When brushing, it needs to be even and thin, and no bubbles or accumulation can occur.
3. Cyanide should be used, poured and sealed as soon as it is used. To prevent condensation and scrapping.
Polyurethane refrigerated truck system material
—Insulation layer that travels with the vehicle
Wanhua Wanefoam® 6000 series is a product specially developed for refrigerated truck manufacturers.
Refrigerated trucks play an extremely important role in cold chain logistics, and the selection of insulation raw materials is the top priority for refrigerated trucks
Wanhua Energy Saving Technology can provide polyurethane composite materials specifically for refrigerated trucks, and can provide refrigerated truck manufacturers with high-quality raw material customization services to meet the diverse and specialized needs of different manufacturers.
| Polyurethane composite material for refrigerated trucks | Refrigerated compartment panels | |
| Low thermal conductivity | Excellent cold-keeping performance | |
| High compressive strength | High compartment strength | |
| High closed cell rate | Good compartment airtightness | |
| Good stability | Long service life, long-lasting |
Crafts
Ceiling insulation construction technology
(1) Base treatment;
(2) 0.3mm environmentally friendly two-component cyanoacrylate;
(3) Spray polyurethane to the designed thickness;
(4) 2mm water-based intumescent fire retardant coating.
Wall insulation construction technology
(1) Base treatment
(2) 0.3mm environmentally friendly two-component cyanide coagulation;
(3) T-shaped wooden piles;
(4) Spraying polyurethane to the designed thickness
(5) Aluminum alloy square tube keel/wooden keel;
(6) 0.5mm V900 color steel plate.
Pillar insulation construction technology
(1) Clean the outer surface of the column concrete;
(2) 0.3mm thick cyanogen moisture-proof layer;
(3) 150mm-200mm thick self-extinguishing hard polyurethane on-site spray insulation layer;
(4) 10mm thick fireproof board is fixed with three layers of galvanized flat iron-40x5mm flat iron. Galvanized angle iron L40x5mm is used to protect the four corners.
Floor insulation construction technology
Extruded board floor insulation (conventional practice)
(1) Base treatment;
(2) 0.5mm anti-oxidation composite aluminum foil vapor barrier membrane;
(3) Layered and staggered paving of 200mm extruded polystyrene insulation board;
(4) 0.3mm waterproof and breathable membrane, butyl tape overlap sealing;
(5) 20mm cement mortar protective layer;
(6) 120mmC30 concrete, mixed with steel fiber;
(7) Diamond abrasion-resistant curing agent treatment.
Polyurethane floor insulation (recommended practice)
(1) 120mm thick C30 concrete, with φ8@200mm double-layer bidirectional steel bars, smoothed as it is poured;
(2) 20mm thick 1:2.5 cement mortar protective layer;
(3) 0.3mm cyanogen moisture-proof layer;
(4) 20mm thick 12.5 cement mortar protective layer;
(5) 200mm thick self-extinguishing hard polyurethane spray;
(6) Waterproof layer;
(7) 20mm1:2.5 cement mortar leveling layer;
(8) Reinforced concrete floor slab
(9) Skylight.
