New Column Ruitang Patents Launched｜Patented Rotomolding Composite for High‑performance Pickleball

Innovation lies in every subtle detail of the production process. For more than ten years, Ruitang Plastic Group has been deeply engaged in modified plastics and rotomolding new‑materials. Centering on raw‑material pretreatment, extrusion modification and finished‑product performance optimization, we keep carrying out technical R&D and have obtained a number of independent intellectual property rights.Our brand‑new column Ruitang Patents is officially launched! We will interpret the company’s self‑developed patents one by one, share R&D ideas and process solutions, and exchange ideas on plastic processing optimization with peers in the industry. As the opening article of this column, we focus on the track of special modified materials for end‑use finished products and introduce an important invention patent of Ruitang Plastic Group.Patent Title: A Rotomolded PE‑Polyolefin Elastomer Composite Material for Pickleball and Its Preparation Method

Patent No.: ZL 2018 1 1597082.7With the rapid popularity of pickleball in China, demand has surged from cultural‑tourism scenic spots, community venues, professional sports clubs and overseas export orders. Nevertheless, most rotomolding manufacturers face common and tough challenges when mass‑producing pickleballs with general‑purpose PE raw materials:

▪️ The resilience of ordinary pure PE cannot be precisely adjusted. Bounce feel is either too hard or overly soft, failing to meet testing standards for professional competitions, and only fit for low‑end products.

▪️ Conventional rotomolding PE shows poor weather resistance. It tends to soften and deform under long‑term outdoor sun exposure at high temperatures, and becomes brittle and cracked in cold winter, leading to high end‑product loss rates.

▪️ Poor fatigue and impact resistance. Balls easily crack and shed fragments after repeated high‑frequency strikes, bringing substantial after‑sales return‑and‑replacement costs to manufacturers.

▪️ Insufficient melt flow stability of general‑purpose materials causes uneven wall thickness and poor sphericity during rotomolding. Flight trajectory deviates, resulting in low production yield.

▪️ In‑house formula modification has high technical barriers with large batch‑to‑batch variations. It consumes considerable costs for R&D and trial materials, and stable third‑party test compliance is hard to achieve.Targeting the specific mechanical, weather‑resistance and processing requirements of rotomolded pickleball products, the R&D team of Ruitang Plastic Group, led by Chen Yeru, Tang Yuhang and Wen Yuan, has conducted in‑depth research on PE‑polyolefin elastomer blending systems. This specially‑developed rotomolding composite material has been granted a national invention patent, solving key mass‑production pain points from the source of raw materials.Core Technical Highlights of This Patented Composite Material✅ Dual‑component elastic blending formula precisely controls ball resilience and hardness, delivering balanced and comfortable hitting performance for both recreational and professional‑grade pickleball production.

✅ Greatly improved UV‑aging resistance and high‑low temperature alternating performance. Products resist deformation and cracking under all‑weather outdoor conditions for longer service life.

✅ Enhanced repeated‑impact and anti‑fatigue performance. Products resist damage and fragment shedding under heavy‑duty use and effectively cut end‑user after‑sales complaints.

✅ Excellent rotomolding melt flow behaviour ensures uniform shell wall thickness and high sphericity, stabilizing flight trajectory and significantly boosting mass‑production yield.

✅ Mature and well‑defined formula with consistent performance across batches. Customers can start large‑scale production directly without repeated in‑house formula adjustment.Three Typical Industrial Application ScenariosScenario 1: Professional Sports Equipment Manufacturers — Meet competition standards and win high‑end bidding orders

Sports‑equipment manufacturers focusing on sport balls and venue accessories previously adopted commercial rotomolding PE particles for pickleball production. Key indicators including resilience and weather resistance failed third‑party certification for official competitions. Such manufacturers were locked in low‑price competition in the low‑end market and excluded from government procurement and large‑scale venue bidding projects.

After switching to this patented custom composite material from Ruitang Plastic Group, all physical and chemical indicators of pickleballs meet official standards. Enterprises obtain competition‑access qualifications, enter high‑end supply chains and gain differentiated competitive advantages with higher unit‑product added value.Scenario 2: Rotomolding Processors for Camping & Cultural‑tourism Products — Reduce outdoor product loss and cut after‑sales replacement costs

Many rotomolding factories supply recreational pickleballs for urban parks, camping sites and resorts, where products are exposed to open‑air environments all year round. In the past, balls softened under summer heat and cracked in cold winter. Factories bore heavy costs for replacement shipments and customer compensation.

With this patented modified rotomolding raw material, pickleballs achieve major improvements in temperature tolerance and anti‑aging performance. Service life for outdoor all‑weather applications is extended sharply. Complaints and return‑replacement volumes drop substantially, saving considerable costs on materials, logistics and labour for processors.Scenario 3: Export‑oriented Ball‑product Manufacturers — Stabilize batch quality and avoid overseas return & deduction risks

Rotomolding factories serving cross‑border ball exports face strict overseas buyer requirements on product consistency and durability. Conventional modified raw materials often suffer batch‑to‑batch performance fluctuation, resulting in inconsistent ball hardness and widespread cracking during transportation or usage. This may trigger heavy losses including customer fine deductions and full‑order returns.

Ruitang Plastic Group’s patented invention delivers a standardized and well‑proven formula. Mechanical properties and processing performance remain highly consistent from batch to batch. Rotomolded pickleballs feature stable sphericity, wall thickness and resilience parameters, guaranteeing uniform export quality and supporting long‑term cooperation with key overseas clients.Core Value This Patent Brings to Rotomolding Customers🔹 Break away from low‑price homogenized competition and upgrade product positioning

Align performance with professional‑competition pickleball standards. Empower customers to develop high‑value‑added products and tap markets for sports‑venue procurement, government projects and premium overseas orders.🔹 Optimize production costs and mitigate dual‑sided losses

Superior rotomolding flowability lowers workshop rejection rates. Meanwhile, outstanding strike‑resistance and weather‑resistance reduce after‑sales return and replacement costs for end‑products.🔹 Eliminate in‑house formula‑development workload for faster time‑to‑market

The mature patented modified formula can be directly applied. Customers save manpower and material costs for repeated formula trials. Pellets are ready for rotomolding processing to shorten new‑product launch cycles.🔹 Expand product portfolio and open new profit opportunities

Beyond standard pickleballs, this composite material fits other rotomolded hollow soft balls for children’s play and fitness‑oriented recreational balls. One raw‑material grade supports multiple product lines.A patent represents a technological breakthrough and marks a new starting point for continuous innovation. Ruitang’s R&D originates from real‑world production challenges. Our technologies take root in manufacturing, and create tangible value for customers.