HPMC manufacturer-Hydroxypropyl Methyl Cellulose in the Application of Putty and Problem Analysis

Neutral Putty:

Depowder: insufficient cementitious material, insufficient cellulose water retention, low calcium content of heavy calcium

Construction performance: improved by bentonite and starch ether

Empty drum; And wall adhesion caused by inadequate

Layering: interface processing

Strength: Can also be adjusted by grading calcium powder

Lime Calcium Putty:

The problems are empty drum, desilting yellowing, construction is not good, desilting, delamination, cracking, thickening

Depowder: insufficient cementitious material, insufficient cellulose water retention or insufficient amount of addition, lime calcium is not pure

Poor construction performance: bentonite and starch ether to improve

Empty drum; And insufficient wall adhesion caused by the appropriate addition of latex powder

Layering: interface processing

Yellowing: Improper cellulose selection

Cracking: base cracking or too hard cracking strength, coating too thick

After thickening: heavy calcium water absorption rate is different, it is recommended to choose zero water absorption or very low heavy calcium powder; Gray calcium contains undigested GaO.

 

Cement-based Putty:

Problems for empty drum, construction is not good, depowder, delamination, cracking, insufficient water resistance, false coagulation

Depowder: insufficient cementitious material, insufficient cellulose water retention or insufficient amount of addition

Poor construction performance: bentonite and starch ether to improve

Empty drum; And wall adhesion caused by insufficient, reasonable addition of latex powder

Layering: interface processing

Yellowing: Improper cellulose selection

Insufficient water resistance: insufficient latex powder and insufficient cementitious materials

Cracking: base cracking or too high strength cracking, coating is too thick, with putty to fill the hole

False coagulation: sodium gluconate can be added to prolong the operational time

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