Mobile Toilet Aroma Plaster Materials

The aroma plaster materials used in mobile toilets are made from natural ores, wood particles, or synthetic materials, with gypsum powder as the core material. Common raw materials include gypsum, ceramics, and volcanic stones. Their characteristics and manufacturing processes must meet the following requirements:

1. Core Materials and Process Characteristics
The core raw material for aroma plaster is semi-hydrated fibrous gypsum powder with a fineness of 325 mesh, which undergoes multiple processes to form numerous microscopic pores. This porous structure utilizes capillary action to adsorb essential oils and slowly release aromatic molecules, ensuring long-lasting fragrance. The neutral pH of gypsum prevents chemical reactions with essential oils, while the 325-mesh fineness balances adsorption speed and release duration—excessive fineness leads to rapid release, while insufficient fineness reduces adsorption efficiency.

2. Performance Standards and Safety
Materials must meet international standards (such as ISO 15901) for porosity to ensure rapid absorption of essential oils. In terms of safety, they must pass tests for heavy metal content, phthalates, and other substances, and must not contain flammable components like alcohol to avoid combustion risks. Additionally, the stability of gypsum makes it resistant to decomposition in humid environments, suitable for long-term use in mobile toilets.

3. Practicality and Adaptability
Finished products should be designed to support hanging or flat placement to accommodate the space constraints of mobile toilets. For example, a camellia-shaped design with a ribbon hanger is both aesthetically pleasing and space-saving. The fragrance release cycle can be extended by regular watering to maintain the adsorption capacity of the gypsum pores and slow down the evaporation of essential oils.

4. Auxiliary Materials and Manufacturing Process
Antifoaming agents are added during production to prevent bubble formation, and electronic scales are used to precisely proportion the ratio of gypsum powder to water (usually 2:1). Molds (such as four- or six-cavity molds) determine the shape of the finished product, while pigments (such as DA or Montmartre pigments) are used for coloring. The mixed gypsum slurry is poured into molds and left to set for 24 hours before demolding, and the final product must be air-dried for more than 48 hours to enhance hardness.

5. Raw Material Expansion and Alternative Solutions
In addition to gypsum, ceramics and volcanic stones can also be used as base materials. Ceramics, formed through high-temperature firing, have dense pores with weaker adsorption but high durability; volcanic stones, naturally porous, have strong adsorption but require surface glazing to prevent essential oil leakage. Synthetic materials like polyurethane foam, while cost-effective, may release volatile organic compounds and should be chosen with caution.