磨削有严格的操作规程，并使用专用磨床进行试验。研磨试验用砂纸为120目(no。0)，腻子试样的重复摩擦次数为5次。最终指标为“砂纸面积20% ~ 80%目测合格”。
There are strict operating rules for grinding, and special grinding machine is used for testing. The grinding test was carried out with 120 meshes of sandpaper (no). The repetitive friction times of putty samples are 5 times. The final index is "20% to 80% of the sand paper area is qualified by visual measurement".
It should be emphasized that the test of putty grindability is to scrape putty the next day after approval (save 1 day under standard conditions). Generally speaking, the best gloss time of putty is also in putty wall three days after putty. It is hoped that the wall surface will be white and gloss will be more difficult when putty is dry.
2. Bond strength.
There are two kinds of bond strength. One is the industry's standard state, namely, dry strength, and the other is the industry's wet strength.
Unlike grinding performance test, bond strength test time is at least 7 days after scraping (dry strength is maintained for 7 days, wet strength is maintained for 7 days on the basis of dry strength, plus 4 days for 11 days).
In terms of bond strength, the state after impregnation conforms to the N-type standard (and waterproof putty) only needs to be measured. The so-called impregnation means that the putty is completely immersed in water for 48 hours, and the water-resistant putty can not be measured. After impregnation, the putty foams and falls off directly.
After the waterproof putty is completely dried, the bonding strength is higher, the surface structure is stronger, and grinding is more difficult. The higher the bonding strength of putty, the greater the bonding strength.
Conclusion: 1. Wall polishing is a very important link in wall decoration. It is an important means to improve the wall finish, meticulousness and final effect.
2. In order to observe the smoothness of the wall at any time during the polishing process, at least 200-watt light bulbs should be held in hand during the day or at night.
3 The choice of wall sandpaper is not the thicker the better, not the finer the better. Generally, we start with fine sandpaper and can't move and change coarse sandpaper, but finally use fine sandpaper to re-polish again. In order to ensure the meticulous wall, there are no scratches.
4. A good team can improve the service life of the wall in the owner's house. It is suggested to use water-resistant putty, even if the gloss is a little difficult, and the team with black heart disease can refuse to use water-resistant putty under various excuses, all from their own efforts, regardless of the owner.
5. Putty abrasiveness. It is tested one day after putty approval. Generally speaking, putty can have better water-resistant putty wall whitening. It is thoroughly polished before it is completely dry. At the moment, the strength is low, the surface structure is not a company, and increasing luster saves more energy. After the putty is completely dried, the bonding strength is high, the surface structure is firm, and grinding is difficult.
6. The bonding strength of putty directly determines the future service life and water resistance of putty. Guizhou putty powder with higher bonding strength has better long-term performance-price ratio when conditions permit.
The above content is organized and published by Jinan putty powder manufacturer. More relevant information can be consulted by clicking on our official website: http://www.rare6.com./