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.
(3) semi-rigid foam? It is mainly used to make automobile dashboard, handrail core, sunshade, gearbox top cover, roof lining, door interior panel, bumper core, thrust pad and so on. Because this kind of polyurethane foam has high pressure load capacity, outstanding shock resistance and impact resistance, it can effectively eliminate vibration noise.
4. Greenhouse management: first, we should do a good job of anti-freezing. Freezable flowers can be equipped with an inner film in the greenhouse to form a two-layer film for heat preservation, and heating can also be carried out in the greenhouse if possible. Second, it is necessary to do a good job in strengthening the greenhouse. On snowy days, when there is snow in the greenhouse, we should remove the snow from the roof in time, increase the light transmission, prevent the greenhouse from being crushed by the snow, and reduce the freezing low temperature after the snow melts. When clearing the snow, you should avoid piercing the greenhouse film and transport the snow out of the nursery. The greenhouse with collapse and collapse deformation should be strengthened and repaired immediately, and if it cannot be repaired, the plants in the shed should be transferred in time, or covered with film, grass curtain or sunshade net to improve the heat preservation effect.
3. Car sunshade curtains are exposed to sunlight in dog days, and people sweat in less than a minute in the sun. similarly, if you love a car for a long time, not only the fashion in which people go in is as uncomfortable as a sauna, but also do great harm to the car. And under the exposure of the sun, the temperature inside the car with closed windows will rise sharply to 50 or 60 degrees Celsius or even higher, and the high temperature will damage the dashboard and leather seats.
Xin Test Standard has long carried out automotive functional testing (automotive seats, internal and external accessories (door panels, dashboards, sub-dashboards, sunshades, bumpers, evaporators, etc.), automotive wiring harness and lights, chassis and transmission, hose pulse), automotive prohibited substances testing, volatile organic compounds VOCs testing, polymer material testing, metal material testing, environmental reliability testing, automotive electronics and other testing business.
In addition to its light weight, polypropylene foam has higher heat resistance, polypropylene foam is more beneficial than polyethylene foam and polystyrene foam on platforms requiring higher operating temperatures, such as sunshade panels, instrument insulation panels and places where the temperature between the doors is easy to rise.
The interior design also gives more fashion sense, although the instrument sunshade is still straight, the dashboard also retains the traditional circular mechanical type, with additional liquid crystal display in the middle; the central console and sub-dashboard adopt a fused layout, the size of the central control screen is about 10.2in, you can turn it off by touching the button on the door handle, and the four-seat rear console is disconnected from the front.
Even more impressive is the compact interior. the recycled cork-a material that absorbs carbon dioxide during production-has been used on the tops of dashboards, sunshades and doors-as an alternative to traditional foam materials. all other decorative panels were omitted and the exposed basic metal structure was painted blue.