Such as sunshade panels, exterior insulation panels and local areas where the temperature between the doors is easy to rise. In the field of temperature, polypropylene foam is more advantageous than polyethylene foam and polystyrene foam, for example, in addition to light weight, because polypropylene foam has higher heat resistance, epp materials are in higher demand. Why is the substitution of epp materials so great in the automotive field?
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●?? One is to clear the ditch and reduce dampness. Clean up the ditches in time to reduce the field humidity and prevent waterlogging damage caused by stagnant water in the field; the whole bed in the greenhouse is covered with plastic film, and the ditch is covered with dry straw to reduce the humidity in the greenhouse. The second is to keep warm against the cold. Pay attention to the heat preservation of vegetables, check the leakage of the greenhouse film, close the shed at the right time in the morning and evening, properly uncover the film and ventilation when the temperature is high, adjust the temperature and humidity in the shed, and increase the light. Open-field vegetables can be tied around the waist, floating surface covering sunshade net, straw and other anti-freezing. Third, strengthen management. Do a good job in pruning vegetables in the field, beating leaves, hanging vines, fertilizing, cultivating soil and so on. Fourth, post-disaster management. After the freezing weather of rain and snow, timely ventilation and humidity drop, spraying to prevent disease, frostbite disease cleaning and other measures, strict control of watering, sunny weather should pay attention to timely return to the curtain to prevent plant seedlings from withering and dying.
In addition to its light weight, polypropylene foam has a higher heat resistance, polypropylene foam is more advantageous than polyethylene foam and polystyrene foam in areas where higher operating temperatures are required, such as sunshade panels, instrument insulation panels and places where the temperature between the doors is easy to rise.
Yes. Unless the car is affixed with a darker glass explosion-proof film, it is difficult to recognize the condition inside the car near the car body in broad daylight, let alone a surveillance camera 2-3 meters high. However, according to the requirements of the “Technical conditions for the Safety of Motor vehicle Operation”, the windshield of the car and the laminated glass used by drivers to observe the line of sight can thus be seen that the transmittance should be higher than or equal to 70%, and all laminated glass cannot post reflective sunshade film.
Greenhouse heat preservation should be done a good shading work, greenhouse heat preservation in the hot season greenhouse vegetable cultivation should adopt shading cover measures, commonly used shading equipment is sunshade, shading should be selected according to plant species. Short plants choose black shading net to choose gray shading in autumn and winter vegetable cultivation. Because the gray shading can prevent the growth of insects, if the seeds or film delay the cultivation of plants need to use the network. On August 7, when the weather is hot, it can be used in the sunshade net, which is relatively weak in the cold season, does not need lighting or no curtain, and does not shade in the heavy rain season. The heat preservation time of the net greenhouse is not long, and the plants are covered on the surface, especially the dark shade opens the daylighting. When growing mushroom crops, greenhouse heat preservation will not cause fungal crop infection, and the products can be recycled.
As for your own equipment, you should wear hiking shoes or light sports shoes, a waterproof suit, and a climbing stick if you want to go camping in the mountains. Other small bits and pieces should also be considerate, including sweat socks, sunshade hats, gloves, glasses, backpacks and so on. Then there are picnic utensils, including gas tanks, stoves and simple aluminum pots and rice pots are also indispensable. As for specific food, just prepare enough according to your personal preference and how long you plan to stay, but water is very important. You can also bring some water purification tablets with outdoor kettles and thermos.