Product Description

Factory wholesale hpmc(hydroxypropyl methyl cellulose ) best price 
1. Introduction:
 

Hydroxy-propyl Methy Cellulose

HPMC is odorless, tasteless,non-toxic cellulose ethers producted from natural high molecular cellulose through series of chemical processing and achieved.It is white powder with good water solubility. It has thickening, adhesion ,dispersing, emulsifying, film, suspended, adsorption, gel, and protetive colloid properties of surface activity and maintain moisture function properties ect.

One of the most important properties of hydroxypropyl methyl cellulose is that, in a water-based solution, it does not have a gelation property when heated. Instead of precipitating out as methylcellulose does, it causes the entire solution to congeal into a semi-flexible mass that can no longer flow. The more HPMC that is present, the lower the critical temperature needed to achieve this effect. 

The ability of hydroxypropyl methyl cellulose to absorb water is what has led to one of its most common uses — as a substitute for human eye tear-film. When this substance is added to eye drops or other ophthalmologic aids, it increases the amount of time the drops spend on the cornea by absorbing the water that is present and preventing early evaporation. Theoretically, the longer a lubricant substance stays on an eye, the less irritation suffered. Solutions containing 2% hydroxypropyl methyl cellulose are typically used during orbital surgery to protect the corneas. 

In addition to being used as a ocular protector, hypromellose is also used in theconstruction industryto make adhesives, and to mitigate the presence of water. The leading manufacturer of HMPC for industrial applications is Dow Wolff Cellulosics GmbH, and one of their most popular products is Walocel™ which is a thickening agent. When used in a construction environment, the function of HPMCis very similar to hydroxy ethyl methyl cellulose (HEMC).