Kaolin Rubber
Overview
Kaolin Rubber is a composite material where kaolin clay, a naturally occurring aluminum silicate, is incorporated into rubber matrices as a functional filler. This modification enhances mechanical properties while reducing material costs compared to pure rubber formulations. The kaolin content typically ranges from 10% to 40% by weight, depending on the desired balance between performance and economics. Industrially, kaolin serves as a reinforcing agent, improving tensile strength and wear resistance without significantly compromising elasticity. Its platelet-shaped particles also contribute to better dimensional stability in finished products. The material is particularly valued in sectors where cost-efficient durability is prioritized over high-performance elastomer properties.
Physical and Chemical Properties
Kaolin Rubber exhibits intermediate hardness (Shore A 50–80) and retains the elastic behavior of its base rubber (commonly SBR or NBR). The kaolin filler increases compressive strength by 15–30% compared to unfilled rubber, while maintaining elongation-at-break values of 200–400%. Its thermal resistance improves marginally, with service temperatures up to 100–120°C. Chemically, the composite inherits the inertness of both components. Kaolin's pH-neutral nature (6.0–8.0) prevents rubber degradation, making it suitable for mildly acidic or alkaline environments. The material shows excellent resistance to water, oils, and non-polar solvents, though strong acids or bases may attack the clay component over prolonged exposure.
Main Applications
The largest application segment for Kaolin Rubber is industrial rubber goods manufacturing, where it's used for conveyor belt covers, gaskets, and vibration dampeners. Its balanced cost-performance ratio makes it ideal for medium-duty applications where premium carbon-black-filled rubbers would be uneconomical. In automotive sectors, kaolin-filled rubber appears in door seals, trunk liners, and under-hood components requiring heat resistance. Footwear manufacturers utilize it for outsole compounds, benefiting from its abrasion resistance and easy pigmentation. Emerging applications include agricultural equipment parts and low-voltage cable insulation, where its dielectric properties are advantageous.
Safety and Storage
As a cured rubber product, Kaolin Rubber presents minimal health risks during end-use. However, uncured compounds require precautions against kaolin dust inhalation during mixing and processing. Facilities should implement local exhaust ventilation and provide NIOSH-approved particulate respirators for workers handling raw materials. Storage recommendations include maintaining temperatures below 35°C to prevent premature vulcanization in uncured stocks. Cured products should be kept away from ozone-generating equipment and direct UV exposure to prevent surface cracking. Shelf life for uncured compounds is typically 6–12 months when stored in sealed containers with moisture barriers.
B2B Procurement Guide
When sourcing Kaolin Rubber, buyers should clearly specify technical parameters: kaolin grade (hydrous or calcined), particle size distribution (usually 1–15 microns), and loading percentage. For critical applications, request test certificates for tensile strength (ASTM D412) and compression set (ASTM D395). Supplier evaluation should include their compounding expertise – quality depends heavily on kaolin dispersion techniques. Bulk orders (20+ metric tons) commonly receive 5–10% price discounts. Consider regional suppliers to minimize logistics costs, as the material's density makes long-distance shipping expensive relative to its value.
Related Manufacturers
- 主营：耐火材料、硅藻土粉、白云石粉、高岭土、贝壳粉、滑石粉、石英砂、金刚砂、碳酸钙、玻璃微珠、石墨粉、远红外粉、石英粉、麦饭石粉、沸石粉、重钙粉、轻钙粉、高纯负离子液、膨润土、赤石脂粉、鹅卵石雨花石、彩色石子、活性白土、膨胀石墨、硅酸锆
- 主营：电气石、滑石粉、火山石、高岭土、氧化铁颜料、氧化铁红、氧化铁黑、氧化铁绿、氧化铁黄、氧化铁棕、氧化铁蓝、四氧化三铁、铁灰、膨润土、彩砂、染色彩砂、水洗五彩石、托玛琳、染色云母片、氧化铁黄313、国标铁黄、彩色石英砂
- 主营：膨润土、硅藻土、碳酸钙、高岭土、水洗高岭土、煅烧高岭土、滑石粉、木粉、木质纤维、负离子粉、轻质碳酸钙、重质碳酸钙、钙基膨润土、钠基膨润土、玉米芯、杨木粉、沸石粉、负离子液
- 主营：四钠、乙二胺四乙酸、柠檬酸钠、高岭土、EDTA锌钠、一水柠檬酸、TDTA铜钠、EDTA钙钠、EDTA锰钠、二钠、三钠、鱼蛋白、黄腐酸钾颗粒、磷酸二氢钠、磷酸氢二钠、三聚磷酸钠、磷酸三钠、焦磷酸二氢二钠、磷酸氢二钾、磺酸、海藻精、铁钠、AOS、卡松、CAB-35、AES
- 主营：高岭土、滑石粉
- 主营：石英系列、石棉纤维系列、海泡石系列、高岭土系列、橡胶粉系列、悬浮剂增稠剂系列、耐火材料系列、氧化铁颜料系列、碳酸钙系列、陶土系列、硅藻土、火山石、汇算镁铝、粉煤灰、硅灰、矿粉、介质棉、红土、石英砂、硅线石、蓝晶石、蛭石、脱膜粉、硅酸铝
- 主营：天然鹅卵石、雨花石、彩色石子、高岭土、蛭石、营养土、火山石、黑色金刚砂、地坪五彩石、变压器鹅卵石、鹅卵石滤料、水处理鹅卵石、分目烘干砂、石英砂、黑白石英砂、五彩石、膨润土、重钙粉、轻钙粉、矿粉、粉煤灰、夜光石、人工挑选鹅卵石、抛光鹅卵石
- 主营：重质碳酸钙、碳酸钙、滑石粉、高岭土、海泡石、石灰石、硅藻土、一级矿粉、萤石矿石、活性钙、沉淀硫酸钡、氢氧化钙、氧化钙、膨润土、透明粉、硅酸铝粉、贝壳粉、彩砂、轻钙、萤石粉、水镁石、矿粉、铸石粉、浴沙、金玉明砂
- 主营：白云石粉、玻璃砂、玻璃微珠、高岭土、硅灰、硅线石、硅藻土、海泡石纤维、滑石粉、钾钠长石粉、矿渣粉、蓝晶石、铝矾土、麦饭石粉、硼砂、膨润土、羟基磷灰石、石英粉、石英砂、土状石墨/鳞片石墨、氧化铝、石墨、萤石粉、氧化钙、叶蜡石粉、铁粉
- 主营：重钙粉、轻钙粉、滑石粉、煅烧高岭土、膨润土、活性钙、硅灰、硅藻土、绿泥石粉、伊利石粉、白云石粉、石英粉、重晶石粉、活性白土、灰钙、变压器鹅卵石、彩色石子、金刚砂、硅酸铝粉、矿粉、粉煤灰、五彩石、黑白石英砂
- 主营：滑石粉、白陶土、碳酸钙、高岭土、金刚砂、石英砂、白云石砂、耐火材料、地坪材料、彩色地坪料、高尔夫球场、耐磨地坪硬化剂
- 主营：金刚砂、金刚砂耐磨地坪材料、石英砂、高岭土、石英粉、鹅卵石、水洗石、重钙粉、白云石、雪花白、珊瑚石、硫酸钡、轻钙粉、白沙子、重晶石、火山石、膨润土、珊瑚骨、麦饭石、风景石、铁砂、玻璃砂、蛭石、彩砂
- 主营：负离子液、水溶负离子、二氧化钍、高岭土厂家、氧化铁颜料、清除剂、碳酸钙、能量粉、粘土粉、陶土粉、金属硅、重钙粉、水溶负离子晶体、麦饭石粉、立德粉、石榴石砂、石英砂、蛭石、硫铁砂、火山石、石英粉、负离子粉、硅藻土、陶瓷球、钒铁、滑石粉
- 主营：石英砂、金刚砂、金刚砂地坪材料、高岭土、橡胶粉、白云石、蛭石、云母、轻钙粉、重钙粉、重晶石粉、质感砂、鹅卵石、白沙子、火山石、方解石、球场砂、草坪砂、石英砂滤料、滑石粉、膨润土、凹凸棒土、陶土粉、麦饭石粉、石英粉
- 主营：滑石粉、钙粉、海泡石、高岭土、硬脂酸钙、硬脂酸锌、氧化铁颜料、塑料助剂、地坪材料、石子、鹅卵石、彩砂、膨润土、远红外陶瓷粉