Answer: HPMC (Hydroxypropyl Methyl Cellulose) has: Water Retention: Prolongs hydration in cementitious materials, preventing premature drying；Thickening: Enhances viscosity and workability of mortars/plasters；Adhesion: Improves bond strength in tile adhesives and renders；Solubility: Dissolves in cold/hot water, forming a colloidal solution；Thermal Stability: Maintains performance across a wide temperature range.

Answer: We have HPMC/MHEC from 400 mPas to 200,000 mPas viscosity (Measured by NDJ series rotational viscometer).

Answer: The most important function of HPMC is water retention, followed by thickening. In wall putty, as long as the water retention is good, lower viscosity is okay. The higher the viscosity, the better the relative water retention. However, when the viscosity exceeds 100,000, the viscosity has a negative effect on the water retention. At the same time, it can cause problems such as poor smearing and difficult workability.

Answer: HPMC production involves:
● Alkalinization: Treat cellulose (wood pulp/cotton) with alkali to form alkali cellulose.
● Etherification: React with methyl chloride and propylene oxide to introduce hydroxypropyl and methyl groups.
● Purification: Neutralize residual alkali, wash, and remove salts.
● Drying & Grinding: Dry the product and mill it into fine powder (80–200 mesh).
● Quality Control: Test viscosity, methoxyl/hydroxypropoxyl content, and moisture.

Answer: Yes, HPMC is compatible with:
● Redispersible Polymer Powders (RDP): Enhances flexibility and adhesion.
● Hydroxypropyl Starch Ethers (HPS): Boosts anti-sag properties.
● Air-entraining Agents: Adjusts density and thermal insulation.
● Retarders/Accelerators: Modifies setting times without compromising HPMC’s water retention.

Answer:
● Particle Size: Finer powders dissolve faster.
● Water Temperature: Cold water slows dissolution; pre-dispersion in hot water (≤60°C) accelerates hydration.
● PH: Optimal dissolution occurs in neutral to slightly alkaline conditions.
● Mixing Speed: High-shear mixing reduces lump formation.

Answer: HPMC (Hydroxypropyl Methyl Cellulose) contains both methyl and hydroxypropyl groups, offering better high-temperature stability and water retention. MHEC (Methyl Hydroxyethyl Cellulose) has methyl and hydroxyethyl groups, providing improved freeze-thaw resistance and compatibility with certain polymers.

Answer: Hydroxypropyl Methyl Cellulose is referred to as HPMC, alias: Hypromellose; Cellulose; 2-hydroxypropylmethyl Cellulose ether; Cellulose hydroxypropyl methyl ether Hyprolose.

Answer: All our products complies with ISO 9001, ISO 14001, and CE standards for construction materials.

Answer: Daily-chemical grade HPMC must meet safety standards for personal care products (e.g., low heavy metal content, non-irritating), focusing on transparency, dissolution speed, and film-forming properties, suitable for laundry detergent, dish soap, foaming hand sanitizer, etc.
While, construction grade HPMC emphasizes high water retention, thickening, and anti-sag performance to meet the requirements of cement-based materials.
Therefore, their production processes and purity controls differ accordingly.

Answer: HEC acts as a thickener and stabilizer in coatings, improving leveling, anti-spattering, and storage stability while enhancing pigment dispersion. It is widely used in water-based paint, latex paint, etc.

Answer: RDP strengthens flexibility, bond strength, and impact resistance of tile adhesives through film-forming properties.

Answer: The typical RDP dosage in tile adhesives is 3%-5% (by weight of powder materials).
When combined with HPMC:
    ● HPMC provides water retention and workability, while RDP enhances flexibility and crack resistance;
    ● Their synergy improves bond strength (especially in low-temperature environments), reduces shrinkage, and extends open time.

Answer: We accept T/T, L/C, D/P, D/A, CAD, online payment...

Answer: Yes, for bulk orders, we support installment payments (e.g., 70% deposit + 30% balance). Specific terms can be negotiated based on order value and cooperation history.

Answer: Generally speaking, we can ship the products within 7-14 days after receiving your deposit. Depending on the distance and shipping method, it will take about 7-60 days. location and holiday

Answer: We usually use 25kg PP woven bag for our products. In addition, we can also use jumbo bags of 500kg if special requirements apply.

Answer: Our products are non-hazardous. However, upon request, we can customize moisture-proof or anti-static packaging compliant with UN standards to ensure safety under special transport conditions.

Answer: Depending on the destination, we can ship by boat, train and plane.

Answer: Yes, we provide comprehensive technical support. Our services include formulation guidance, compatibility testing, troubleshooting, and on-site application demonstrations.

Answer: Yes, our R&D team can develop tailored formulations based on specific applications (e.g., unique substrates or climate conditions) and provide full support from lab trials to mass production.

Answer: If you have any technical problems after delivery, please contact our technical team and provide details including your order number, product batch and a description of the problem. We will remotely troubleshoot the problem via video call or data analysis. We prioritize customer satisfaction and aim to resolve issues efficiently. Let us know how we can help!

Answer: We commit to an initial response within 2 hours and a solution within 24 hours (extended to 48 hours if lab verification is required) to minimize disruptions to your operations.

Answer:
● Environment: Store in a cool, dry, ventilated area away from direct sunlight.
● Moisture Control: Keep sealed in original packaging to avoid clumping (HPMC is hygroscopic).
● Temperature: Ideal storage temperature: 5–30°C. Avoid freezing or prolonged high heat (>40°C).
● Shelf Life: Typically 12–24 months if stored properly.

Answer: RDP must be sealed in a dry environment. After opening, we recommend vacuum resealing to prevent moisture absorption and clumping. Use within 1 month for optimal performance.

Answer: If stored properly (temperature ≤30°C, humidity ≤60%), no additional testing is needed within the shelf life. For expired or improperly stored batches, test viscosity and solubility before use.

Answer: Humidity >70% may cause HPMC to absorb moisture and agglomerate.
For unopened original packaging, the product can be restored by inverting and tapping the package.
For opened products, use within 3 months. Severely agglomerated products can be dispersed by high-speed shear mixing without affecting water retention, though we recommend prioritizing unused batches.

Answer: JINJI CHEMICAL is a leading global manufacturer since 2001, specializing in cellulose ethers with R&D centers and ISO-certified production facilities.

Answer: We have more than 20 years experience in cellulose ether industry. Since 2018, we have been specializing in the foreign export trade of chemical products (cellulose ether, RDP, PP Fiber, etc) as a direct manufacturer. And now, our diverse range of chemical products has been exported to more than 30 countries and regions worldwide.

Answer: You can get basic technical information about our products from the Products Menu in our website. If you need more information, please kindly contact with our sales representative from Contact Menu in our website or directly send a email to contact@jinjichemical.com

Answer: Reach out to our Business Development or Sales Department via email (contact@jinjichemical.com) or phone (+86 0311 67260858) to express your interest. Include details such as the purpose of your visit, preferred dates, and the number of attendees. Our team will confirm availability and share a visit agenda, including safety briefings, facility tours, and technical discussions.
If you need, we can assist with official invitations for visa applications.
A dedicated representative will guide you through our ISO-certified production lines, R&D labs, and quality control facilities. Interactive demonstrations of HPMC applications (e.g., tile adhesive) can be arranged upon request.
After the visit, we’ll provide follow-up materials and schedule follow-up calls to address any questions.
For the latest updates, visit our official website or contact us directly. We look forward to hosting you