Summarize and solve the problems of putty principle and construction!

Shandong chuangyao Biotechnology Co., Ltd. has been engaged in the R & D and production of putty powder mortar and other powder additives for many years. Main products: hydroxypropylmethylcellulose and redispersible latex powder are widely used in water resistant putty and thermal insulation mortar. 01 detailed explanation of water-resistant putty all indoor building putty is divided into three categories: 1. The worst - "fake and inferior putty" which can't meet this standard is mainly made by mixing ore powder and glue on site, which is easy to bulge, peel, crack and has a very short service life, such as "scraping white" in the northern region and "scraping old powder" in Jiangsu and Zhejiang regions. 2. Medium - products that meet the standard of general putty have been restricted in most parts of the country. Although their firmness has been slightly improved, they are still easy to peel and crack, and their service life is relatively short. 821 putty powder and 821 putty paste are the typical ones. 3. Best - the water-resistant putty is not only solid, without bulging, peeling and cracking, but also has a long service life, and the second decoration does not need to be removed. Comparison between water-resistant putty and common putty water-resistant putty is a kind of building putty. In addition to water-resistant (n-type) products, there are general (Y-type) products. The most important difference between the two is the water-resistant performance and strength. Water resistant products are required to have a bonding strength of more than 0.50mpa in standard state, while general products are only more than 0.30mpa. In addition, water resistant products are required to have no peeling, cracking or bulging after being immersed in water for 48 hours after scraping and coating, and to have a bonding strength of more than 0.30mpa, while general products will fall off after being immersed in water, with a strength of zero. Generally speaking, the service life of water-resistant putty should be more than 15 years after it is normally put on the wall, while the service life of general non water-resistant putty can only reach about 5 years when the outer layer is protected by emulsion paint. The biggest harm of these non water resistant putty is that its service life is short, it is easy to empty, peel and crack, which brings great hidden danger for interior decoration. In addition to good water resistance, water-resistant putty mainly has the following characteristics 01 good hand feel. Add hydroxypropyl methylcellulose for chuangyao brand water-resistant putty, putty is like cream, with a good hand feel. The surface of water-resistant putty is smooth and delicate after construction, and the putty after polishing treatment will give people a greasy feel, with decorative effect can be used as decorative layer. 02 good durability, add chuangyao brand redispersible latex powder, the water-resistant putty produced can be scrubbed with wet cloth, and the water resistance is very good. Due to the poor water resistance of common putty, it must be removed and cleaned together with the original coating before the decoration, and then the putty is scraped again. It not only increases the cost and causes the waste of resources and the increase of decoration cost (material cost and labor cost), but also eliminates the waste, which is difficult to be recycled and will cause pollution to the environment. Water resistant putty is once and for all. After several years of second, third or more times of decoration, it is unnecessary to shovel down the putty layer, polish the surface layer and carry out the next process after partial repair, saving time, labor and protecting the wall. Generally good water-resistant putty can ensure the same life as the wall. It can save the specific whiteness and density of the water-resistant putty, and save 25-30% of the coating amount compared with the ordinary putty. The standard JG / t298-2010 "putty for building interior" has a clear stipulation on the strength of putty. The standard state bond strength of ordinary putty is greater than 0.25MPa, and there is no requirement for the strength after immersion, while the standard state bond strength of water-resistant putty is required to reach 0.50mpa, and the bond strength after immersion is greater than 0.30mpa. It can be seen from the standard that the strength of water-resistant putty is higher than that of ordinary interior wall putty, so the use of water-resistant putty is not easy to produce hollowing and falling off. 05 the unit price of water-resistant putty with high cost performance is 1-2 times of that of ordinary putty, which is also a factor affecting the promotion of water-resistant putty. However, the decoration effect of water-resistant putty is far from that of ordinary putty. Moreover, from the comprehensive calculation of the amount of coating and the cost and construction cost of putty during the second decoration, the cost performance ratio of water-resistant putty is higher. When applying water-resistant putty on the wall, pay attention to the following problems: 1. When the water absorption of the wall base is strong, the wall shall be fixed and sealed before applying the putty, so as to avoid excessive absorption of the water and rubber in the putty by the base, which will affect the adhesion of the putty. 2. Grasp the inclination of the scraping and coating tools, and pay attention to the uniform force when scraping the putty to ensure that the putty is full. 3. In order to avoid excessive shrinkage, cracking and falling off of putty, the thickness of single batch should not be too thick. According to the characteristics of different putty, the thickness should be 0.5-1.0mm. 4. Do not too much back and forth scraping, so as not to roll off or extrude the putty rubber to seal the surface so that it is not easy to dry. The problems that should be paid attention to when polishing the water-resistant putty are that the strength of the water-resistant putty is high and the product has a large adhesive property, so it is more difficult to mix and scrape it than the non water-resistant putty. The strength of water-resistant putty is also higher than that of non water-resistant putty, and it will be more laborious to polish. 1. Do not leave scratches as far as possible during construction. If there are scratches, they can be removed by using tools. 2. When the putty layer is 90% dry, the polishing treatment shall be arranged, which saves labor and does not adhere to sandpaper. 3. After grinding, the ash layer on the surface shall be removed immediately to prevent the secondary indoor dust pollution. 4. For manual grinding, the sandpaper (cloth) shall be wrapped on the grinding pad, and the pad shall be pushed back and forth with force. It is not allowed to use only one or two fingers to press the sandpaper for grinding, so as to avoid affecting the flatness of grinding. For mechanical grinding, electric grinding machine is often used, and the sandpaper is clamped on the grinding machine, gently on the base layer