Products Description
HPMC primarily uses natural materials rich in cellulose, such as wood pulp or cotton linters, as basic raw materials. Its production process integrates complex and sophisticated chemical and physical techniques. First, the cellulose raw materials are mixed with a sodium hydroxide solution in a specific ratio to make them fully swell, creating favorable conditions for subsequent reactions. Subsequently, propylene oxide and methyl chloride are added to the swollen cellulose. These substances undergo etherification reactions with cellulose molecules, introducing hydroxypropyl and methyl groups respectively. By precisely controlling key parameters such as reaction temperature, pressure, and time, the degree of etherification can be regulated, thus producing HPMC products with different properties. After the reaction is completed, through a series of post - treatment processes including neutralization, washing, drying, and pulverization, the finished HPMC is obtained, usually in the form of white or off - white powder.
Physicochemical Properties
Solubility:
HPMC has unique dissolution characteristics. It can dissolve rapidly in cold water, forming a uniform, transparent, and viscous solution. However, it is insoluble in hot water. This property makes it perform excellently in many temperature - sensitive application scenarios. For example, during the wet mixing of building materials, even if the ambient temperature changes, it can maintain a good dissolution state and performance.
Viscosity Characteristics:
The viscosity range of its solution is extremely wide and can be adjusted according to different degrees of polymerization and substitution. Low - viscosity grades are suitable for products with high fluidity requirements, such as certain liquid pharmaceutical preparations. High - viscosity grades, on the other hand, are used in fields that require strong adhesive force and water - retention capacity, like building putty powder and tile adhesives.
Stability:
HPMC is stable at room temperature and is less likely to react with common chemicals, allowing for long - term storage without affecting its quality. Nevertheless, under extreme conditions such as high temperature, high humidity, or strong acids and alkalis, its structure may be affected to some extent, leading to changes in performance.
Surface Activity:
HPMC has certain surface activity, which can reduce the surface tension of liquids and enhance the compatibility between different phases. It plays an important role in the emulsification and dispersion during the preparation of emulsions and suspensions.
Applications
Pharmaceuticals
As tablet binders and film - coating materials to improve formability and drug stability.
Used in artificial tears for eye moisturization and protection.
Manufactures plant - based hollow capsules, ideal for drug storage with natural origin and long shelf life.
Construction
Enhances water retention and adhesion in putty, tile adhesives, and mortars to prevent cracking.
Adjusts viscosity in coatings for better leveling and pigment dispersion.
Food Industry
Acts as a thickener/stabilizer in ice cream and beverages to improve texture.
Produces edible, biodegradable packaging films for food preservation.
Daily Chemicals
Stabilizes and thickens shampoos/body washes for consistent viscosity and active ingredient distribution.
Products Packing
FAQ
1. Are you a manufacturer?
---- Yes , we own factory and have rich experience to provide professional solutions .
2. Can you do customization?
---- Yes , We accept client's requests of OEM & ODM, can do customized logo on products body or package with your own brand names,also we can do private label stick on each package.
3. How to make an order?
---- Please send us your email, receiving address and contact phone number, then order request link would be sent to you to check andmake the payment.
4. What is your payment terms and payment methods?
---- Payment can be done via T/T, LC, western union
5.Can I get samples?
A: Yes, we can supply free sample, you pay for the freight charge only.
6. What is your terms of delivery?
---- We accept EXW, FOB, CIF, etc. You can choose the one which is the most convenient or cost effective for you.
If you have any questions about our acetate fiber tow, or if you are interested in placing an order, please feel free to contact us. We look forward to establishing long - term and mutually beneficial partnerships with you.
Miya
Shijiazhuang City, Hebei Province, China
whastapp/wechat/phone
+86 17503221159
sales01@cnplastics.cn/gaoannita@gmail
