Refrigerated Transport Board Bonding
The compartment structure of thermostatic transportation vehicles should be bonded with polyurethane sealant during the entire assembly process to ensure greater inherent strength and increased durability. Sandwich insulation materials for refrigerated insulation boards currently mainly use polyurethane, polystyrene boards and extruded boards on the market. The new high-strength, weather-resistant polyurethane sealant developed by Shark in response to the above materials can ensure the strong sealing and bonding of constant temperature transportation materials. The refrigerated truck is composed of the walking part of the special automobile chassis, the thermal insulation body (generally composed of polyurethane material, glass fiber reinforced plastic, color steel plate, stainless steel, etc.), refrigeration unit, temperature recorder in the cabin and other components. For vehicles with special requirements, Such as meat hook trucks can be equipped with meat hooks, cargo troughs, aluminum alloy guide rails, ventilation slots and other optional components.
Cold storage is a building that uses artificial refrigeration to make a very fixed space reach a specified temperature, which is also very convenient for storing items. The cold storage insulation board is what we usually call polyurethane cold storage, so the polyurethane cold storage insulation board is based on the requirements of users or specific projects. We generally produce polyurethane foam as a sandwich board for insulation materials. Insulation materials are now the most common insulation materials in large and medium-sized cold storage.
The thickness of the polyurethane cold storage insulation board is generally composed of 50MM, 75MM, 100MM, 120MM, 150MM, 200MM, 250MM, 300MM and other specifications, but the length and width of the cold storage insulation board can be customized according to the actual needs of users. Generally, polyurethane black and white materials are mixed in a certain ratio on site, and then the foam is extruded into a prefabricated mold with high-pressure equipment to foam.
It can be manually operated by scraping, and the machine can be rolled. The open time is long and the construction flexibility is high.
It is suitable for manual squeegee coating, machine shower coating, cold pressing process, no machine blocking, easy operation by workers, and convenient construction.
The bonding material can be used for a long time, and the weather resistance of the product meets the JG/T 396 standard.
The unit bonding surface bears high bonding force, and the cohesive strength of the adhesive layer and the bonding strength between the adhesive layer and the bonded surface are high. It can ensure that the board will not crack and degummed after bonding.
Flatness standard: +0.1mm surface must be clean, oil-free, dry and water-free.
The supporting roles of the main agent (off-white) and curing agent (dark brown) are executed in corresponding proportions, such as 100:25, 100:20
After mixing the main agent and the curing agent, stir evenly quickly, and use a stirrer to repeatedly pick up the gel 3-5 times without silky brown liquid. The mixed glue will be used up within 20 minutes in summer and 35 minutes in winter
(1) 200-350 grams (materials with smooth interlayer: such as inorganic boards, foam boards, etc.)
(2) 300-500 grams for delivery (materials with interlayer porous: such as rock wool, honeycomb and other materials)
The glued board should be compounded within 5-8 minutes and pressurized within 40-60 minutes. The pressurization time is 4-6 hours in summer and 6-10 hours in winter. Before the pressure is relieved, the adhesive should be basically cured
Pressure requirement: 80-150kg/m², the pressure must be balanced.
The curing temperature is above 20℃, and it can be processed lightly after 24 hours, and can be processed deeply after 72 hours.
After the glue is used up every day, please clean it with dichloromethane, acetone, thinner and other solvents to avoid clogging of the glued teeth and affect the amount of glue and the uniformity of the glue.