Wholesale PU Foam Filled Tyre Manufacturers

What precautions should be taken during the installation of PU foam filled tyre

Before installation: dual protection of environment and equipment
Environmental cleanliness control
When installing tires, the cleanliness of the environment is crucial. The installation area must be kept dry and dust-free, and the ideal temperature should be controlled between 15℃ and 35℃. If there is oil, moisture or other impurities in the environment, the bonding between the polyurethane material and the rim may fail. According to research data from the laboratory of Jiangsu Topower Tyre Co., Ltd., when the ambient humidity exceeds 80%, the bonding strength may drop by up to 30%. Therefore, it is recommended to install in a dust-free workshop or use a professional dust cover to ensure the bonding effect.
Equipment adaptability verification
When using a hydraulic tire changer or professional injection equipment, be sure to ensure that the pressure range of the equipment (such as 10-15MPa) matches the tire specifications.
Rim pretreatment
Before installation, rust and old glue residues on the rim surface must be thoroughly removed. In particular, for aluminum rims, never use acidic cleaners to avoid corrosion.
During installation: Control of key process parameters
Filling amount and uniformity
The filling amount of polyurethane materials must strictly follow the provisions of the product manual. Overfilling (exceeding the rated value by 10%) will cause the tire to be too rigid, thereby reducing the shock absorption performance, while underfilling may cause air leakage.
Curing time and temperature management
After filling, the PU foam filled tyre needs to be left to stand for at least 24 hours. It should be noted that the curing time will be extended by 4 hours for every 5°C decrease in ambient temperature. Jiangsu Topower Tyre Co., Ltd. recommends using a constant temperature box (temperature ±2°C) to accelerate the curing process, but high temperatures (over 40°C) must be avoided to prevent material aging.
Dynamic balancing and debugging
After installation, a dynamic balancing test must be performed to ensure that the imbalance does not exceed 50g. Since the filling material of Topway's PU Foam Filled Tire is evenly distributed, its dynamic balancing performance is better than that of traditional tires, but it still needs to be tested according to standard procedures to ensure the stability of tire performance.
After installation: Quality verification and maintenance specifications
Appearance and sealing inspection
After installation, the tire surface should be carefully checked for bubbles or cracks, especially the sealing of the joint between the filling material and the rim.
Regular maintenance recommendations
It is recommended to check the PU foam filled tyres for wear every 500 hours or every quarter, focusing on the tread depth and the state of the filling material. Through regular maintenance and monitoring, users can effectively extend the service life of the tires and improve the overall use experience.

What are the effects of environmental factors on the performance of PU foam filled tires?

In modern industrial applications, polyurethane materials are widely used in PU foam filled tyre manufacturing due to their excellent physical properties and wide applicability. However, environmental factors such as temperature, humidity, ultraviolet rays and chemical media have a significant impact on the performance of polyurethane tires.
The impact of temperature on polyurethane materials
High temperature environments will significantly accelerate the aging process of polyurethane materials. According to the laboratory research of Jiangsu Topower Tyre Co., Ltd., when the ambient temperature is continuously higher than 50℃, the breaking rate of polyurethane molecular chains is accelerated, resulting in a decrease in elastic modulus of about 15%, thereby affecting the load-bearing capacity of the tire.
On the contrary, low temperature environments also pose a risk of embrittlement to polyurethane materials. Below -20℃, the impact strength of ordinary polyurethane materials decreases by 30%, which is prone to tread cracks. Jiangsu Topower Tire Co., Ltd.'s low-temperature enhancement technology enables the tire to maintain stable physical properties under extreme temperature differences of -40℃ to 60℃ by adding nano-scale toughening agents, ensuring its safety in use under extreme cold conditions.
Impact of humidity on polyurethane materials
Humidity changes also pose an invisible threat to polyurethane materials. In an environment with a humidity of more than 80%, micro-battery corrosion may form at the bonding interface between the rim and the polyurethane filling layer, resulting in a decrease in peel strength.
In addition, humidity fluctuations can cause hygroscopic expansion of the material. When the moisture absorption rate of the polyurethane material exceeds 2%, the dimensional change rate of the tire will exceed 1%, affecting the stability of the vehicle's driving. To this end, Topower has developed a low-hygroscopic formula. By optimizing the molecular chain structure, the moisture absorption rate of the material is controlled below 0.8%, ensuring the dimensional stability of the tire in high-humidity environments such as coastal areas and rainforests.
Impact of ultraviolet rays on polyurethane materials
Ultraviolet radiation is an important factor in the degradation of polyurethane materials, especially the UV-A band (320-400nm), which can trigger free radical reactions in polyurethane molecular chains, resulting in a 20% decrease in surface hardness.
Long-term ultraviolet radiation not only affects the surface hardness, but also causes the breakage of the molecular chain inside the material and reduces the elastic recovery rate. To this end, the company uses light stabilizer compounding technology to enable the tire to maintain more than 85% of its initial performance after 5,000 hours of accelerated aging test, which is particularly suitable for PU foam filled tyres customized for photovoltaic power station equipment.
The impact of chemical media on polyurethane materials
The performance of polyurethane materials will also be threatened when they come into contact with chemical media such as oil pollution. When exposed to solvents such as mineral oil and diesel, the swelling rate of polyurethane materials may exceed 5%, causing tire deformation. Jiangsu Topower Tire Co., Ltd.'s oil-resistant formula controls the swelling rate of the material under the ASTM D471 standard to less than 2% by introducing fluorocarbon segments, ensuring the stability of the tire in oily environments such as construction machinery and mines.
At the same time, the influence of acid-base media cannot be ignored. Environments with pH values ​​below 4 or above 10 will accelerate the hydrolysis of polyurethane. To this end, the company has developed acid-base resistant formulas to ensure the long-term stability of tires in a variety of chemical media.