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Zhejiang Yisheng New Material Co., Ltd. is a professional enterprise engaged in the design, development, manufacturing, application, and sales of cellulose ether, located in the Shangyu Economic and Technological Development Zone, part of the Hangzhou Bay National Industrial Park. With a core concept of safety, environmental protection, and sustainable development, the company boasts an annual production capacity of 15,000 tons of cellulose ether, offering a complete range of products including HEC (hydroxyethylcellulose), HEMC (hydroxyethyl methylcellulose), and HPMC (hydroxypropyl methylcellulose). Our products serve various sectors such as oil fields, coatings, dry powder mortar, cosmetics, personal care products, medicine, and many others. Yisheng has a global presence, providing stable cellulose ethers and services to customers worldwide.
As a professional China Dry Mix Mortar Additive Supplier and Dry Mix Mortar Additive Company, The company adheres to the principles of safety and environmental protection as the foundation of its development. It implements and further consolidates safety and environmental protection measures, striving to create green and environmentally friendly production processes, safe and effective control systems, and orderly production management. This approach lays a solid foundation for the company's sustainable development. Yisheng boasts a scientific management mechanism, a comprehensive quality management system, stringent product testing methods, advanced technology, state-of-the-art equipment, and high-quality after-sales service.
Product Overview
The global dry mix mortar industry processes tens of millions of tons of bagged and bulk products annually, serving the construction sector's growing preference for factory-controlled, ready-to-use mortar systems over site-mixed cement-sand blends. Factory-produced dry mix mortars offer consistent quality, reduced labour, faster installation speeds, and compliance with international product standards — none of which are achievable without precisely dosed specialty additives.
Cellulose ether is the foundational functional additive in virtually all dry mix mortar products. Added at 0.05–0.4% by weight of the dry mix, HPMC or HEMC provides water retention (preventing premature loss of mix water to substrates), pseudoplastic rheology (making mortar easy to spread but resistant to sag), and workability (extending the time window for installation and adjustment). Without cellulose ether, even well-formulated cement mortars fail basic open time and bond strength requirements.
RDP is added to products requiring polymer modification — typically above C1 classification in tile adhesives or where flexibility and crack resistance are required in renders and repair mortars. HPS supplements cellulose ether in cost-optimised formulations, contributing workability and slip resistance. Yisheng's complete product range and formulation support services make us the preferred single-source additive supplier for dry mix mortar producers across Asia, Europe, the Middle East, and beyond.
Specification
| Additive Type | Grades Available | Dosage in Dry Mix (%) | Primary Effect |
|---|---|---|---|
| HPMC (MP Series) | 400 – 200,000 mPa·s; standard & surface-treated | 0.05 – 0.40 | Water retention, workability, open time |
| HEMC (ME Series) | 5,000 – 100,000 mPa·s; standard & surface-treated | 0.10 – 0.35 | Water retention, gypsum compatibility |
| HPS | DS 0.05–0.30; standard grade | 0.05 – 0.25 | Slip resistance, workability aid, cost optimisation |
| RDP — VAE | Tg +5 to +15°C; MFFT 0–5°C | 1.0 – 5.0 | Flexibility, adhesion, impact resistance |
| RDP — Acrylic | Tg +10 to +20°C; MFFT 0–10°C | 1.5 – 5.0 | UV resistance, exterior durability |
| Packaging (all) | 25 kg kraft bag (standard); 500–1,000 kg big bag (bulk) | ||
| Lead Time (standard grades) | 7–14 business days ex-works Shangyu | ||
Application
- Tile Adhesive Production (C1 through C2S2): The full range of EN 12004 classification levels is achievable with Yisheng HPMC + RDP combinations. Grade and dosage selection guides are available for each classification target.
- Render & External Wall Insulation (EN 998-1 & EIFS): HPMC or HEMC at 0.15–0.30% provides workability and water retention for hand and machine-applied renders; RDP at 1–3% is added to EIFS grades requiring flexibility and impact resistance.
- Wall Putty & Skim Coat: HPMC at 0.3–0.5% (higher dosages than in tile adhesive are typical in putty) provides smooth spreadability, reduces dust, and prevents cracking in thin-layer interior finishes.
- Self-Leveling Compounds (EN 13813): HPMC at controlled dosages prevents bleed water and controls the viscosity of the fresh compound to achieve adequate flow while preventing segregation of aggregate or filler.
- Tile Grout (EN 13888): HPMC in grout provides water retention to prevent cracking of the setting grout, and contributes to the smooth, easy-to-apply consistency required for efficient joint filling.
- Cementitious Waterproofing (EN 14891): HPMC for water retention and workability; acrylic RDP at 3–5% for the crack-bridging flexibility required in waterproofing membranes for wet areas and below-grade applications.
Production Tip: Always use surface-treated (delayed-dissolve) cellulose ether grades in automated dry-mix mortar production. Standard (non-treated) grades will begin to hydrate on contact with any moisture in the production environment, causing lump formation, reduced flowability, and potential blockages in blending and bagging equipment.
Email: sarah@ys-cellulose.com
Phone: +86-18067879812 / +86-575-82966958
