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22 40 7 oil seal

2025-08-14 18:18
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    A layer of hydrophilic material called protective colloid is wrapped around the surface of redispersible powder  particles. This layer of material mainly plays a role in protecting polymer powder particles from damage during storage and transportation, and promoting their redispersion when polymer powder comes into contact with water. The vast majority of protective colloids for redispersible powder are polyvinyl alcohol (PVA).