The Future of Sleep: Glue-Free Mattress Pocket Spring Unit Innovation

Date：2025-09-04

Identifying the Optimal Mattress of 2025—Glue-Free Pocket Spring Technology

Why are glue-free mattresses essential to contemporary sleep solutions? Conventional mattresses comprise support layers, comfort layers, and fabric covers, often bonded with adhesives that emit hazardous volatile organic compounds such as formaldehyde. Glue-free mattress technology is revolutionizing the furniture industry by delivering healthier, more sustainable, and more durable sleep surfaces. Lianrou's glue-free pocket spring units employ a proprietary ultrasonic welding process and an innovative four-leaf clover structural design, conforming to ergonomic and environmental standards. This approach effectively eliminates formaldehyde emissions associated with adhesives while providing a more stable and resilient core, aligning with the demands of environmentally conscious mattress manufacturers seeking the premier mattress of 2025.

Characteristics of Glue-Free Pocket Spring Units

Four-Leaf Clover Structural Design Enhances Core Stability

The four-leaf clover configuration of the adhesive-free pocket spring units is engineered based on ergonomic principles, ensuring dimensional stability, superior support, and increased resilience. This design offers enhanced pressure distribution and a personalized fit. The clover structure improves spring independence, further reducing mechanical transmission and interference, resulting in an exceptionally quiet sleep environment. The robust support ensures comfort even under substantial weight, maintaining structural integrity without deformation or collapse, with springs exhibiting rapid rebound.

Ultrasonic Welding Improves Durability

Each pocket spring is secured through full ultrasonic welding, ensuring enhanced stability and extended service life. Ultrasonic welding surpasses hot-melt adhesives in stability, reducing the risk of tearing. Utilizing a durable, tear-resistant fabric as the spring encasement material extends the lifespan of the mattress compared to traditional spring units.

Capitalizing on New Market Opportunities and Enhancing Brand Value

Compared to latex, foam, and Bonnell spring mattresses, pocket spring units offer advantages such as superior comfort, independent support zones, dense support points, body contouring, and scientific support mechanisms. They are predominantly used in premium and high-quality mattresses. Incorporating glue-free pocket spring units elevates brand perception and adds a "healthy and eco-friendly" attribute to products, aligning with the global shift toward green manufacturing. This core material is favored by high-end mattress producers aiming to develop luxury sleep solutions.

Lianrou offers OEM and ODM customization services for non-glue pocket spring units, including custom shapes. Please DM us for a quote.

The Intensive R&D Behind Glue-Free Pocket Spring Mattresses

Six years ago, the Chinese mattress market lacked truly glue-free spring units. Most spring strips were bonded with hot-melt adhesives, which, even when environmentally friendly, posed challenges in controlling harmful gas emissions.

One day, an international mattress manufacturer approached Lianrou with a request for technology that eliminated the need for hot-melt adhesives in bonding pocket spring strips.

Development of China’s First Glue-Free Pocket Spring Unit Production Line

Responding to this demand, Lianrou Machinery initiated the development of glue-free production technology for pocket spring mattresses. After six years of research, numerous trials, and testing tens of thousands of components, Lianrou patented a novel process and launched China’s first glue-free pocket spring bed net production line in 2023. This automated unit comprises a pocket spring manufacturing machine and an ultrasonic welding machine, seamlessly integrated to eliminate manual intervention, reduce labor costs, and accelerate production. The resulting mattress nets contain no adhesives, thereby removing formaldehyde emissions.

Features of the Glue-Free Pocket Spring Production Line

Capable of producing 120-160 springs per minute, this line supports high-volume manufacturing. It allows for customized designs to meet specific support zones and incorporates intelligent spring adjustment features for optimal support.

Global Customer Support

Since its inception, the glue-free pocket spring unit production line has garnered widespread adoption among international mattress manufacturers. They utilize Lianrou’s glue-free pocket springs to produce healthier mattresses, ensuring cleaner indoor air quality, eliminating formaldehyde concerns, and enabling direct use without odor removal.

Applications in the Global Mattress Industry – Lianrou Machinery

With over 26 years of expertise, Lianrou Machinery is a leader in the production of pocket spring machines and mattress nets.

Our equipment is partnered with over 2,000 brands across more than 150 countries. Our glue-free pocket spring machines have been showcased at major industry events such as the China International Furniture Fair (CIFF), the Middle East Sleep Expo, and Interzum Germany, receiving enthusiastic acclaim. Our machinery is exported to markets including Japan, the United States, India, Germany, and Australia, supporting the development of glue-free mattresses.

Three Core After-Sales Service Systems of Lianrou

Lianrou provides comprehensive after-sales support, including spare parts, troubleshooting assistance, and instructional videos, ensuring full operational training for customer staff. We promote the development of intelligent production systems with remote monitoring, cloud data management, and digital manufacturing capabilities. Additionally, we offer customized smart factory solutions to help clients establish integrated virtual-physical production ecosystems.

The shift toward glue-free mattresses represents a major milestone in the bedding industry, driven by increasing consumer demand for healthier and more sustainable sleep solutions. Traditional mattresses often rely on adhesives that release volatile organic compounds (VOCs), including formaldehyde, which can impact indoor air quality and long-term health. By introducing glueless pocket spring units, we have eliminated these concerns while improving the overall mattress structure. Our production line, launched in 2023 after six years of intensive research and development, uses ultrasonic welding technology to assemble each pocket spring unit with precision and strength. This method ensures a more stable spring unit that resists loosening over time, even under constant use. Each pocket spring unit is designed with a four-leaf clover shape that enhances independent spring movement, resulting in superior body support and pressure relief during sleep. We have already supplied our glue-free mattress production systems to manufacturers in Japan, the United States, India, Germany, France, and more than 150 countries. Many global brands have adopted our technology to meet growing market expectations for eco-friendly and non-toxic mattresses. These mattresses are not only more durable but also easier to recycle, making them an excellent choice for brands seeking to align with green manufacturing principles. Our company, Lianrou Machinery, is known as the pioneer in pocket spring machinery in China and a global leader in mattress production solutions. We offer advanced after-sales service, including remote production monitoring, smart factory planning, and technical support to ensure clients achieve optimal production efficiency. By choosing a glue-free mattress solution, manufacturers gain a competitive edge in the premium bedding market and deliver healthier, more sustainable sleep products to their customers.