The Historical Origins of Qiangyi glutinous rice glue plywood

The Great Wall has stood for thousands of years not only because of its thick bricks and stones, but also because of the adhesives(glue) used in its construction . In terms of construction materials, Ming Dynasty craftsmen creatively used a magical “biological adhesive”—glutinous rice mortar. They mixed cooked glutinous rice glue with slaked lime and sand to create a paste. The amylopectin in the glutinous rice reacted chemically with the lime, producing an exceptionally strong, durable, and waterproof organic-inorganic composite material. This is the key to why many sections of the Great Wall remain tightly bonded even after centuries of wind and rain erosion. Today, this ancient wisdom has been reborn through modern technology. The new “glutinous rice glue plywood” uses the same glutinous rice adhesive technology as the Great Wall.

Overview of Qiangyi glutinous rice glue plywood：

The innovation behind glutinous rice plywood lies in drawing inspiration from the principles of the ancient Great Wall. Qiangyi glutinous rice glue plywood also name as second-generation plywood that represents a century of innovation. It has achieved No.1 in selling and top reputation in China. Widely favored by renovation companies, cabinet manufacturers, and homeowners. It uses 0-formaldehyde, 0-benzene Lingmei glutinous rice glue as the adhesive, select all AA grade eucalyptus veneer as the core material, adding magnesium chloride and water and magnesium oxide. Magnesium oxide is a super flame retardant and heat insulation agent, with its own ignition point reaching 2852℃, this made Qiangyi glutinous rice plywood achieve B1 grade fire retardant standard (B3: Flammable Materials; B2: Combustible materials). Glutinous rice glue after curing, creates an alkaline environment, while termites and insects prefer an acidic environment. Combined with its strong permeability, termites ingest some of the glutinous rice glue along with the wood fibers. The alkaline nature of the glue isindigestible, leading to death. This glutinous rice glue is made from pure plant/mineral extracts, ensuring safety and stability. It does not involve aldehyde chemical reactions, thus eliminating the introduction of formaldehyde at its source resulting in exceptional environmental performance, achieving super ENF-level environmental protection. Cold-pressed and self-heating molding allows for immediate occupancy after installation. In terms of performance, the combination of primary veneer and glutinous rice glue, processed through multiple layers, endows it with strong nail-holding power, resistance to deformation, flame retardancy, water resistance, moisture resistance, mildew resistance, antibacterial properties, and termite resistance, making it a second-generation multi-layer plywood and a “nine-sided warrior” in the plywood industry.

Explanation of the functions of Qiangyi glutinous rice glue plywood

• 1. Super ENF-grade-Health & Environmentally

Lingmei Glutinous Rice Glue: Glutinous rice flour + magnesium chloride + water + magnesium oxide. This glutinous rice glue is made from pure plant/mineral extracts, ensuring safety and stability. It does not involve aldehyde chemical reactions, thus eliminating the introduction of formaldehyde at its source.

Super ENF Grade Environmental Protection: glutinous rice glue plywood uses formaldehyde-free Lingmei glutinous rice glue, achieving a super ENF grade level of environmental protection with zero benzene. Compared to traditional urea-formaldehyde resin glue (E0 and E1 and E2 grades), glutinous rice glue plywood not only has a higher regulation for formaldehyde emission but also exhibits less variation and possesses a more stable structure across varying environmental climates and temperatures.

• 2. Odorless–Ready to Move In

Eliminating the problem at its source: No harmful substances such as formaldehyde, benzene, or phenol are added during the adhesive production process. Since there is absolutely no formaldehyde in the glue, the biggest source of odor and pollution from renovations is cut off at the source.

Super strong odor locking: After the Lingmei glutinous rice glue is cured, its adhesive forms a stable cross-linked network structure with the wood fiber. It has stable chemical properties, good water resistance, and can quickly penetrate into the interior of the wood. At the same time, after curing, it forms a dense crystalline structure, which firmly locks in the smell of the wood itself. It is also not easy for it to decompose into gaseous substances, so you can move in immediately after installation.

• 3. Anti-mold(anti-deformation)and antibacterial

Grade 0 mildew resistance, antibacterial rate >99%: The magnesium chloride and magnesium oxide in Lingmei glutinous rice glue react to create an alkaline environment. Combined with the strong 60H temperature-controlled drying process,the moisture content of the board is precisely controlled within the golden range of 8-12%. Simultaneously, its excellent waterproof and moisture-proof properties virtually destroy the survival environment of all mold. What does Grade 0 mildew resistance mean?

It provides superior and long-lasting protection: Even in extreme environments of continuous high temperature and humidity, it can effectively inhibit the colonization and growth of mold spores for a long time.

The effect is visible to the naked eye: the surface is clean and free of bacterial spots, not only under a microscope but also in daily use observation.

• 4. Superior nail holding and load-bearing capacity

Superior nail-holding capacity and greater resistance to deformation: Particleboard is the mainstream material for cabinet doors on the market, mainly because it is not easily deformed. However, its nail-holding capacity is very poor, and the cabinet doors are prone to loosening after being opened and closed for a long time. Qiangyi glutinous rice glue plywood uses Lingmei glutinous rice glue, which forms a dense crystalline structure after curing. It has a very strong rigidity and does not easily absorb water and swell. Therefore, its resistance to deformation is comparable to that of particleboard. At the same time, it has superior nail holding power and load-bearing capacity.

• 5. Waterproof, moisture-proof, and expansion-resistant

Waterproof, moisture-proof, and anti-swelling: Lingmei glutinous rice glue has super penetrability. After being applied to the core of the board, it quickly penetrates into the internal structure, tightly wrapping the wood fibers and preventing water molecules in the air from contacting the wood fibers, thus preventing them from absorbing water and swelling.

• 6. 9.5 grade termite resistance

9.5 grade termite resistance: The traditional Urea-formaldehyde resin boards are slightly acidic, making them ideal for termites. The wood fibers also provide ample food for the termites, significantly increasing the likelihood of termite infestation. However, glutinous rice glue after curing, creates an alkaline environment, while termites and insects prefer an acidic environment. Combined with its strong permeability, termites ingest some of the glutinous rice glue along with the wood fibers. The alkaline nature of the glue isindigestible, leading to death.

• 7. Anti-aging, crack-resistant

Class V Crack Resistance and Anti-aging: The traditional Urea-formaldehyde resin adhesive, resulting from the chemical reaction between urea and formaldehyde, has a highly unstable structure. Regardless of environmental conditions, it undergoes a reverse reaction and decomposes (this reaction is exacerbated under high temperature and humidity), releasing formaldehyde back into the adhesive. Therefore, urea-formaldehyde boards continuously age and are prone to cracking. In contrast, glutinous rice adhesive is extremely stable after curing. Its cured crystalline structure is exceptionally strong and resistant to decomposition; the Great Wall standing for a full year is the best proof of this. Combined with a 15-day extended curing period, glutinous rice glue plywood exhibits a very low coefficient of thermal expansion and contraction, resulting in superior crack resistance and anti-aging properties.

• 8. B1 Flame Retardant

Because magnesium oxide is a super flame retardant and heat insulation agent, with its own ignition point reaching 2852℃, the addition of magnesium oxide to Lingmei glutinous rice glue, along with the dense crystalline structure formed after the glue cures, prevents air from contacting the wood fibers. Even if burned for several hours, it will only carbonize and will not burn.

• 9. Heat and sound insulation

Magnesium oxide is an excellent heat and sound insulation agent. Its addition endows the board with extremely strong heat insulation performance. At the same time, it causes the rice glue to form a dense crystalline structure after curing, which greatly improves the sound insulation performance of the multi-layer board and even meets the standards of sound insulation composite materials. Its heat and sound insulation performance brings customers an ultimate energy-saving experience. There are no hot and cold dead corners indoors, and the perceived temperature is more constant and comfortable. At the same time, the good insulation layer makes the indoor wall temperature closer to room temperature, thus avoiding condensation and mold problems caused by cold walls.

Application scenarios of Qiangyi glutinous rice glue plywood

•  1. Children’s Rooms/Nurse Rooms

Suitable products: wardrobes, desks, tatami mats, toy cabinets.

Addressing key concerns: Children have weak immune systems, are sensitive to formaldehyde, are frequently active, and surfaces and tabletops are prone to water spillage.

Performance Matching: Level 2 waterproof, water stains can be wiped clean with a simple wipe; Level 0 anti-mildew and antibacterial,helping clean spaces withstand humid environments, anti-mildew and antibacterial >99%; Super ENF Grade with no added formaldehyde, formaldehyde release is less than 0.005mg/m³

•  2. Complete Kitchen Solution

Applicable products: kitchen cabinets, wall cabinets, bar counters

Addressing key concerns: prone to mold growth, weak load-bearing capacity of wall cabinets, areas prone to oil stains, susceptible to moisture, and prone to cracking.

Performance Matching: Glutinous rice glue forms a natural moisture-proof layer, preventing mold growth on the cabinet back panel; Nail Holding capacity: glutinous rice glue plywood has a strength of 2040MPa, far exceeding ordinary multi-layer boards and particleboard; Antibacterial Properties: Grade 0 anti-mold and antibacterial structure helps create a clean space unaffected by humid environments, with anti-mold and antibacterial properties >99%.

•  3. Bedroom Furniture

Applicable products: wardrobes, headboard walls, wall panels, bedside tables, etc.

Addressing key concerns: prone to mold growth, weak shelf load-bearing capacity, susceptible to moisture, poor nail holding power, and easy deformation.

Deformation Resistance: glutinous rice glue plywood > Particleboard > Ordinary Multi-layer Board;

Nail Holding Capacity: glutinous rice glue plywood has a nail holding power of 2040MPa;

Antibacterial Properties: Grade 0 anti-mildew and antibacterial properties help clean spaces withstand humid environments, with anti-mildew and antibacterial activity >99%;

Super ENF Grade: Glutinous rice glue contains no formaldehyde, and formaldehyde emission is less than 0.005mg/m³ .

• 4. Elderly Room Furniture 

Applicable products: wardrobes, headboard walls, wall panels, bedside tables, etc. Addressing key concerns: Susceptibility to mold, weak shelf load-bearing capacity, susceptibility to moisture, poor nail-holding power, swelling upon contact with water, and noise.

Performance Matching: the strong sound insulation of glutinous rice glue plywood protects the sleep of the elderly; Super ENF Grade: Glutinous rice glue contains no formaldehyde, and formaldehyde release is less than 0.005mg/m³ .

• 5. Medical and elderly care institutions

Applicable products: wardrobes, headboard walls, wall panels, bedside tables, reception desks, bar counters, etc.

Addressing key concerns: Hospital wards, where patients have the lowest resistance; nursing homes, where the elderly reside long-term. Choosing glutinous rice glue plywood demonstrates the organization’s respect for life and is a wise choice for risk management.

Performance Matching: Grade 0 mildew resistance, antibacterial rate >99%; Safety First: Flame retardant Grade B1, precious evacuation time in disasters; Super ENF Grade

• 6. Extreme cold weather space

Application scenarios: underfloor heating rooms, cold storage linings, cold chain logistics packaging, hotels and guesthouses in high-altitude and cold regions

Addressing key concerns: Low-temperature embrittlement: Ordinary boards become brittle and prone to cracking below -5℃; Thermal expansion and contraction: Underfloor heating switches cause severe temperature stress due to temperature differences; Drying cracking: In winter, when humidity is less than 20%, the boards lose moisture and shrink.

Performance matching: Stability: After curing, the magnesium glutinous rice glue forms a dense crystal structure, which effectively organizes the contact between water molecules and the outside world, keeping the internal moisture content of the board within the golden range and reserving a drying buffer space; Deformation resistance: Multi-layer symmetrical laying allows for uniform release of internal stress.

• 7. High-temperature space

Application scenarios: Sunrooms, bay window cabinets, custom-made balconies, kitchen stove surrounding cabinets, warehouses in southern regions without air conditioning, workshops.

Addressing key concerns: High-temperature softening: The adhesive layer softens at temperatures above 40℃, reducing load-bearing capacity; Accelerated formaldehyderelease: Formaldehyde release doubles for every 10℃ increase in temperature; High-temperature cracking: The surface of the board cracks under high temperatures.

Performance matching: Crack resistance: The surface crack resistance reaches level 5; Super ENF level stable release: Under high temperature and high humidity conditions, the formaldehyde release of the board will hardly increase.

• 8. Drying Challenge

Application scenarios: Customized whole-house solutions in arid regions, air-conditioned office environments with year-round humidity (30-40%), and low-humidity environments such as electronics workshops and laboratories.

Addressing key concerns: Imbalanced moisture content: Changes in the moisture content of the board lead to shrinkage and cracking; Joint cracking: Cracking easily occurs between boards.

Performance matching: Water control: After curing, the magnesium glutinous rice glue forms a dense crystal structure, which effectively prevents water molecules from contacting the outside world, keeping the internal moisture content of the board within the golden range; Crack resistance: The surface crack resistance reaches level.

Test report of Qiangyi glutinous rice glue plywood

plywood face

The surface coating of plywood effectively isolates moisture and humidity, preventing deformation, delamination, and mold growth. It also enhances wear resistance, scratch resistance, and corrosion resistance, protecting against insects and environmental damage. The coating improves appearance, stabilizes color, and slows aging, comprehensively extending service life and overall performance. At Qiangyi, we can provide different materials (PET coated & melamine face) and a variety of colors to match different styles.

Melamine face

PET coated