How to improve the insulation effect of polyurethane cold storage insulation materials:
1. Use structural amine ether to reduce thermal conductivity and improve thermal insulation effect;
2. The water content should be reduced as much as possible in various raw materials and formulations to avoid deterioration of thermal insulation performance caused by water foaming;
3, the main material polyether; the product after strict post-treatment, compared with the polyether without post-treatment, the foam cell has a high degree of uniformity, the cell wall is thin, the thermal insulation performance is significantly better than the rear wall macropores Ordinary foam
4. The use of high-efficiency and odorless amine catalysts can effectively adjust the balance of the foaming-gel reaction, so that the skin of the spray booth is thinner, which is beneficial to the performance of the cold storage insulation material;
5. Do not use ordinary polyester polyols.
Sharp Blade, used to cut things like wallpaper, so it is called "wallpaper knife", also known as "art knife". Decoration, decoration, advertising plaque industry is often used.
The most important feature of wallpaper knife is to use the segmented blade which is easy to replace. When using, it can fold off the non sharp section. It can keep the sharpness all the time without sharpening the knife.
Art knife, also known as carving knife or wallpaper knife, is a kind of knife used for art and handicrafts. It is mainly used to cut soft things. It is mainly composed of plastic handle and blade. It is a pull-out structure. There are also a small number of metal tool handles. Most of the blades are inclined. They can be broken along the line of the blade body with blunt blade. New blade appears, which is convenient to use. There are various sizes of art knives.
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