腻子脱粉的一些问题和解决的方法（Some problems and solutions of powder removing of putty）.doc

腻子脱粉的一些问题和解决的方法（Some problems and solutions of powder removing of putty） Waterproof putty powder problem 1? The product does not press off the powder Why? The technical ratio is not reasonable, and there is no film forming material in the putty Solve?: increase the amount of glue (non fiber) in putty, Such as PVA, polyvinyl alcohol powder, redispersible powder, other modified starch powder and sodium bentonite Waterproof putty powder problem. ? 2, the product has been pressed and the powder is removed A lack of water, hard, or rigid cementitious material lacking a film-forming substance ??? solution: increase white cement or calcium powder and other cementitious materials, increase the amount of glue putty (non fiber ratio). 3? The product didnt fall off at that time. After a while, the powder fell off Why?: the lack of film-forming material in the putty, starch adhesive too much, for a long time will absorb moisture in the air, resulting in powder products To solve: the proportion of cement in putty, such as PVA, polyvinyl alcohol powder, redispersible powder Whats more, the phenomenon of powder fall is mainly due to the unreasonable technical ratio of the products The reason for the irrational construction process is less ??? the water is too dry, large (fast) base should be spray or plastic, otherwise it will fall (powder putty quality no problem) ??? how to avoid hollowing ??? clean substrate, no oil, air Should not be used in 821 putty (or before the emergence of a serious putty powder) in case of water resistant putty Should not be more waterproof than putty putty (polystyrene board, rock wool, etc.) at the base of waterproof putty The grass roots should be strong and shall not vibrate in motion or impact Waterproof putty, construction thickness should not exceed 1.5mm per hour, the total thickness should not exceed 2.5mm After the construction of putty, it is best to press the light, and make the base layer dense and small water absorption ??? have powder put