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2 min read
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Apr 19, 2024
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1.What is the gel temperature of HPMC related to?
Normally, for putty powder, the viscosity of HPMC is enough at about 70,000 to 80,000. The main focus is on its water retention performance, while the thickening effect is relatively minor. For mortar, the requirements for HPMC are higher, and the viscosity needs to be around 150,000, which can ensure that it works better in cement mortar. Of course, in putty powder, as long as the water retention performance of HPMC is good, even if the viscosity is low (70,000 to 80,000), it is acceptable. However, in cement mortar, it is more ideal to choose HPMC with a larger viscosity (more than 100,000), because its water retention effect is more significant in this situation.
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2. Is the putty powder falling off the wall related to HPMC?
Answer: The problem of putty powder removal mainly depends on the quality of calcium hydroxide and has little to do with HPMC. If the calcium content of calcium hydroxide is low or the ratio of CaO and Ca(OH)2 is inappropriate, it may cause the putty powder to fall off. Regarding the impact of HPMC, it is mainly reflected in its water retention performance. If the water retention performance of HPMC is poor, it may also have a certain impact on the depowdering of putty powder.
3. How to choose HPMC for different purposes?
The requirements for the use of putty powder are relatively low. A viscosity of 100,000 is enough. The key is to have good water retention properties. In terms of mortar, the requirements are relatively high and higher viscosity is required, and the 150,000 product has better effect. For the application of glue, you need to choose instant products and ensure a high viscosity.
Answer: HPMC is widely used in construction materials, coatings, synthetic resins, ceramics, medicine, food, textile, agriculture, cosmetics, tobacco and other industries. HPMC can be divided into construction grade, food grade and pharmaceutical grade according to its use. At present, most of the domestic production is in the construction level. In the construction level, the amount of putty powder is large, about 90% is used for putty powder, and the other is used for cement mortar and glue.
Answer : HPMC plays the role of thickening, water retention and construction in the putty powder. Do not participate in any reaction.
The reason for the bubble: 1.The water is too much. 2. The bottom layer is not dry, just scrape a layer on the top, it is also easy to foam.
HPMC
Answer : HPMC can be divided into instant-soluble and hot-dissolved, instant-dissolved products, which dissipate quickly in cold water and disappear into the water. At this moment, the liquid has no viscosity, because HPMC just disperses in water and does not dissolve. About 2 minutes, the viscosity of the liquid gradually increased, forming a clear viscous colloid. Hot-melt products can quickly disperse in hot water and disappear in hot water when they clump in cold water. When the temperature drops to a certain temperature, the viscosity gradually appears until it forms a clear viscous colloid.
The hot melt type can only be used in putty powder and mortar. In liquid glue and coating, it will show clumping phenomenon and cannot be used. Instant type, with a wider range of applications, can be used in putty powder and mortar, as well as liquid glue and paint, there is no taboo.
(1) Specific gravity: specific gravity is bigger, heavier want to be better.
(2) Whiteness: Whiteness does not determine whether HPMC is easy to use, and if whitening agent is added in the production process, its quality will be affected.However, good products are mostly whiter.
(3) Fineness: The fineness of HPMC is generally 80 mesh and 100 mesh, with less 120 purposes. Most HPMC produced in Hebei is 80 mesh. The finer the fineness is, the better it is in general.
(4) Transmittance: Put HPMC for putty powder into water to form a transparent gel and observe its transmittance. The greater the transmittance, the better, indicating less insoluble matter.The transmittance of the vertical reactor is generally good, while that of the horizontal reactor is worse, but it does not mean that the quality produced by the vertical reactor is better than that produced by the horizontal reactor. There are many factors that determine the quality of the product.The content of hydroxypropyl inside is high, the content of hydroxypropyl is high, it is better to keep water.
The above information is provided by the wall putty manufacturer.
Guojindi
·
Follow
2 min read
·
Apr 19, 2024
--
1.What is the gel temperature of HPMC related to?
Normally, for putty powder, the viscosity of HPMC is enough at about 70,000 to 80,000. The main focus is on its water retention performance, while the thickening effect is relatively minor. For mortar, the requirements for HPMC are higher, and the viscosity needs to be around 150,000, which can ensure that it works better in cement mortar. Of course, in putty powder, as long as the water retention performance of HPMC is good, even if the viscosity is low (70,000 to 80,000), it is acceptable. However, in cement mortar, it is more ideal to choose HPMC with a larger viscosity (more than 100,000), because its water retention effect is more significant in this situation.
2. Is the putty powder falling off the wall related to HPMC?
Answer: The problem of putty powder removal mainly depends on the quality of calcium hydroxide and has little to do with HPMC. If the calcium content of calcium hydroxide is low or the ratio of CaO and Ca(OH)2 is inappropriate, it may cause the putty powder to fall off. Regarding the impact of HPMC, it is mainly reflected in its water retention performance. If the water retention performance of HPMC is poor, it may also have a certain impact on the depowdering of putty powder.
3. How to choose HPMC for different purposes?
The requirements for the use of putty powder are relatively low. A viscosity of 100,000 is enough. The key is to have good water retention properties. In terms of mortar, the requirements are relatively high and higher viscosity is required, and the 150,000 product has better effect. For the application of glue, you need to choose instant products and ensure a high viscosity.
Answer: HPMC is widely used in construction materials, coatings, synthetic resins, ceramics, medicine, food, textile, agriculture, cosmetics, tobacco and other industries. HPMC can be divided into construction grade, food grade and pharmaceutical grade according to its use. At present, most of the domestic production is in the construction level. In the construction level, the amount of putty powder is large, about 90% is used for putty powder, and the other is used for cement mortar and glue.
Answer : HPMC plays the role of thickening, water retention and construction in the putty powder. Do not participate in any reaction.
The reason for the bubble: 1.The water is too much. 2. The bottom layer is not dry, just scrape a layer on the top, it is also easy to foam.
HPMC
Answer : HPMC can be divided into instant-soluble and hot-dissolved, instant-dissolved products, which dissipate quickly in cold water and disappear into the water. At this moment, the liquid has no viscosity, because HPMC just disperses in water and does not dissolve. About 2 minutes, the viscosity of the liquid gradually increased, forming a clear viscous colloid. Hot-melt products can quickly disperse in hot water and disappear in hot water when they clump in cold water. When the temperature drops to a certain temperature, the viscosity gradually appears until it forms a clear viscous colloid.
The hot melt type can only be used in putty powder and mortar. In liquid glue and coating, it will show clumping phenomenon and cannot be used. Instant type, with a wider range of applications, can be used in putty powder and mortar, as well as liquid glue and paint, there is no taboo.
(1) Specific gravity: specific gravity is bigger, heavier want to be better.
(2) Whiteness: Whiteness does not determine whether HPMC is easy to use, and if whitening agent is added in the production process, its quality will be affected.However, good products are mostly whiter.
(3) Fineness: The fineness of HPMC is generally 80 mesh and 100 mesh, with less 120 purposes. Most HPMC produced in Hebei is 80 mesh. The finer the fineness is, the better it is in general.
(4) Transmittance: Put HPMC for putty powderHPMC for putty powder into water to form a transparent gel and observe its transmittance. The greater the transmittance, the better, indicating less insoluble matter.The transmittance of the vertical reactor is generally good, while that of the horizontal reactor is worse, but it does not mean that the quality produced by the vertical reactor is better than that produced by the horizontal reactor. There are many factors that determine the quality of the product.The content of hydroxypropyl inside is high, the content of hydroxypropyl is high, it is better to keep water.
The above information is provided by the wall putty manufacturer.