How to solve the problem of putty powder powder?


Release time:

2015-10-16

Author:

New Earth Group

Source:

How to solve the problem of putty powder powder?

For putty powder users,putty powderPowder is a very serious problem, it will cause the latex paint off, and the putty layer bulging, cracks, and then cause the latex paint finish cracks. So what is the cause of the internal and external wall putty powder powder, there are raw materials, there are construction reasonsThere are also many reasons such as unreasonable formula design.
1. The bonding strength of putty is not enough to cause depowdering. Manufacturers blindly reduce costs. The bonding strength of rubber powder is poor and the addition amount is small, especially for interior wall putty. The size of bonding strength, depowdering without depowdering, rubber powder and the quality and addition amount of glue have a great relationship.
2. The design formula is unreasonable, the problem of material selection and the problem of structure are very important in the putty formula. For example, hydroxypropyl methyl cellulose (HPMC) is not waterproof putty for interior walls. Although HPMC is very expensive, it does not work for filling materials such as double fly powder, talc powder and wollastonite powder. If only HPMC is used, it will causePowder removal, while CMC and CMS with low price do not powder removal, but CMC and CMS cannot be used as waterproof putty or exterior wall putty, because CMC and CMS react with gray calcium powder and white cement, which will cause powder removal. Polyacrylamide is also added into gray calcium powder and white cement as waterproof coating, which will also cause powder removal due to chemical reaction.
3. Uneven mixing is the main cause of putty powder removal for internal and external walls. Some manufacturers in the country produce putty powder with simple and varied equipment, which is not special mixing equipment. Uneven mixing causes putty powder removal. The patented product horizontal multi-screw mixer of Henan Huikang Industrial Corporation has solved the problem.This problem, and the price is not high.
4. Mistakes in the production process cause putty powder removal. If the mixing mixer does not have the function of cleaning and has more residue, CMC in ordinary putty will react with calcium ash powder in waterproof putty, and CMC and CMS in interior wall putty will react with white cement in exterior wall putty to cause powder removal. Henan Huikang Company Special EquipmentThe cleaning port is set up to clean up the residues in the machine, which not only ensures the quality of putty, but also can use one machine for multiple purposes and buy one equipment to produce various putty.
5. Different quality of filling materials are also easy to cause dedusting. A large amount of filling materials are used for interior and exterior wall putty, but the content of Ca2CO3 in heavy calcium powder and talcum powder is different in different places, and different pH value will also cause dedusting of putty. For example, the interior wall putty powder in Chongqing and Chengdu uses the same rubber powder, but talcum powder and heavy calcium powderDifferent, in Chongqing do not take off the powder, in Chengdu do not take off the powder, in Henan, northeast do not take off the powder, and in some areas on the powder.
6. The weather is also one of the reasons for the dusting of putty on internal and external walls. For example, the putty on internal and external walls is dry in some arid areas in the north with good ventilation. The putty finish is fast and does not dusting. However, it is not possible in the south, especially in some areas in the south with plum rain weather, long-term humidity and poor putty film formation, and it will alsoPowder, so some areas to adapt to add ash calcium powder waterproof putty.
7. Inorganic binders such as gray calcium powder and white cement are not pure and mixed with a large amount of double fly powder. The so-called multi-functional gray calcium powder and multi-functional white cement on the market are impure, because these impure inorganic binders are widely used, and the waterproof putty for internal and external walls must be depowdered and not waterproof.
8. In summer, the water retention of putty on exterior walls is not enough, especially in high-rise doors, windows and other high-temperature and ventilated places. If the initial setting time of ash-calcium powder and cement is not enough, water will be lost, and if they are not well maintained, they will also be seriously depowdered.
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