The development of cold chain logistics is getting faster and faster. Refrigerator trucks play a decisive role, mainly to protect food safety and ensure the quality of fresh food. Many people think that a refrigerated truck is like a cold storage, and it is free to freeze the cargo loaded into the compartment to the necessary temperature. This is a big mistake. Its refrigeration unit is only used to maintain the temperature of the cargo, not to reduce the temperature. The main purpose of refrigerated trucks is to make perishable and perishable foods such as fruits, seafood, frozen meat and vegetables. What does a refrigerated truck do for food?
When the outside temperature enters the compartment of the refrigerated truck through radiation, conduction, and convection, it will have a qualitative impact on the cargo, so the refrigerated truck will have to act as a refrigeration unit to take away the outside temperature, so as to ensure the temperature of the cargo. Keep the goods at the necessary transportation temperature, otherwise it may deteriorate.
The temperature of the goods must be checked at the time of loading. If the temperature is too high or too low to enter the car, it is thought that setting the refrigeration unit to the necessary transport temperature of the goods to be transported is just a counterproductive. If you can't lower it (or increase it), it will damage the goods. The cooling of the refrigeration unit will cause the temperature of the cargo itself to change, causing it to lose water. This will also cause changes in the quality of the cold cargo, which will lead to a decline in the quality of the cargo and even mildew. This is why refrigerated trucks are the reason to go to the cold storage instead of running to the goods production site.
In fact, my recent understanding of refrigerated trucks reminded me of the foam box I used when I was a child at home to sell popsicles. It contained a layer of quilts so that the temperature of the popsicles could be maintained without melting. Think about the time when I think about it now! The principle of a refrigerated truck is similar to this foam box, except that we have mechanized its innovation.
Hydroxypropyl methyl cellulose is a kind of non-ionic cellulose ether which is made from natural macromolecular material cellulose through a series of chemical processing. They are a white powder that swells into a clear or slightly turbid colloidal solution in cold water. It has the characteristics of thickening, adhesion, dispersion, emulsification, film forming, suspension, adsorption, gel, surface activity, water retention and colloid protection. Hydroxypropyl methyl cellulose and methyl cellulose can be used in building materials, coating industry, synthetic Resin, ceramic industry, medicine, textile, agriculture, daily chemical and other industries.
Chemical equation:
Hydroxypropylmethylcellulose (HPMC) [C6H7O2 (OH) 3-m-n (OCH3) m (OCH2CH (OH) CH3) n] x
Application field:
â—† Cement-based plastering
1. Improve the uniformity, make the plastering easier to apply, and improve the anti-sagging ability. Enhance mobility and pumpability to improve work efficiency.
2. With high water retention, it can prolong the working time of mortar, improve the working efficiency, and help the mortar to form high mechanical strength during the solidification period.
3. The air infiltration is controlled to eliminate the micro-cracks of the coating and form an ideal smooth surface.
â—† Light board
1. It enhances the machinability of the extruded lightweight board, and has adhesive strength and lubricity.
2. Improve the wet strength and the adhesion of the plate after extrusion.
â—† gypsum plaster and gypsum products
1. Improve the uniformity, make the plaster easier to apply, and improve the anti-sagging ability to enhance the fluidity and pumpability. So as to improve work efficiency.2. High water retention, extending the working time of mortar, and producing high mechanical strength during solidification.
3. By controlling the uniformity of mortar consistency, a high-quality surface coating is formed.
â—† Masonry mortar
1. Enhance the adhesion with the masonry surface, and can enhance the water retention, so that the strength of mortar can be improved.
2. Improve the lubricity and plasticity to improve the construction performance. The use of cellulose ether reinforced mortar is easier to use, save time, and improve cost efficiency.
3. The model with special high water retention is available for the bricks with high water absorption
â—† Plate joint filler
1. Excellent water retention, can prolong the cooling time and improve work efficiency. High lubricity makes application easier and smoother.
2. Improve the shrinkage resistance and cracking resistance, and improve the surface quality.
3. Provide a smooth and uniform texture, and make the bonding surface more adhesive.
â—† Tile adhesive
1. The dry mixing ingredients are easy to mix without agglomerates, thus saving working time. As the application is faster and more effective, it can improve the constructability and reduce the cost.
2. The tiling efficiency is improved by extending the cooling time. Achieve adhesion effect.
3. Special development models with high skid resistance are available.
â—† Water-based paint and paint remover
1. The storage life is extended by preventing solid precipitation. It is compatible with other components and has high biological stability.
2. It dissolves quickly without lumps, which helps to simplify the mixing process. The cold water dispersion model can make the mixing faster and more convenient,And it does not produce lumps.
3. It produces favorable flow characteristics, including low splashing and good leveling, which can ensure excellent surface finish and prevent paint sagging.
4. Enhance the viscosity of water-based paint remover and organic solvent paint remover, so that the paint remover will not flow out of the workpiece surface.
â—† Self-leveling floor materials
1. It provides viscosity and can be used as an anti-settlement agent.
2. Enhance mobility and pumpability, thus improving the efficiency of paving.
3. Control water retention to greatly reduce cracking and shrinkage.
Hydroxypropyl Methyl Cellulose,HPMC,Cellulose Ether,Tylose
HENAN JINHE INDUSTRY CO.,LTD , https://www.speciatyelement.com