How much hydroxypropyl methylcellulose is used?

Hydroxypropyl methylcellulose (HPMC) is a multifunctional material widely used in industries such as construction, medicine, food and cosmetics. Its usage varies depending on the specific purpose.

1. Construction industry
HPMC is mainly used as a thickener, water retainer and binder in the construction field, especially in mortar, putty powder, tile adhesive and waterproof coating:
Dry-mixed mortar: The dosage is 0.1%-0.3% of the total amount of cement or base material.
Tile adhesive: The usual addition amount is 0.2%-0.6% of the base material.
Putty powder: The common ratio is 0.3%-0.5%.
Waterproof coating: The recommended dosage is 0.1%-0.4%.

2. Pharmaceutical industry
HPMC is used as a drug carrier, film coating agent or sustained-release agent for tablets in the pharmaceutical field. Its dosage usually depends on the formulation of the drug:
Tablet coating: The dosage is 2%-5% of the total weight of the tablet.
Sustained-release preparations: Depending on the drug release requirements, the dosage can reach 5%-30%.

3. Food industry
HPMC is used as an emulsifier, thickener and stabilizer in food, and is commonly found in baked goods, dairy products and jelly, etc.:
Bakery products: The addition amount is 0.1%-0.5%.
Dairy products: The dosage is 0.2%-0.5%.
Jelly, jam: The recommended dosage is 0.1%-0.3%.

4. Cosmetics industry
HPMC is used as a thickener, film former and moisturizer in skin care products and detergents:
Skin care products: The usual addition amount is 0.1%-0.5%.
Shampoo, shower gel: The recommended dosage is 0.2%-0.4%.
Precautions for use
Dispersion and dissolution: HPMC is soluble in cold water, but it should be avoided to add hot water directly, otherwise it is easy to clump. It is recommended to premix with other powders before adding to water.
Dosage control: Excessive dosage may lead to excessive viscosity or unnecessary cost increase, while insufficient dosage may affect product performance.
Storage and stability: High temperature and high humidity should be avoided during storage to prevent moisture absorption or degradation.

The dosage of hydroxypropyl methylcellulose needs to be accurately calculated according to the specific use and formula design, generally in the range of 0.1%-5%, but some special uses may be higher.