Polyurethane, commonly abbreviated as PU, is a versatile and high-performance polymer that belongs to the family of elastomers. Renowned for its exceptional durability, resilience, and wide range of physical properties, PU is engineered to meet demanding applications across numerous industries. From industrial sealing solutions and automotive components to footwear and insulation, PU offers a unique combination of toughness, flexibility, and resistance to wear, oils, and chemicals. At Kaxite Sealing, we specialize in precision-engineered PU components, leveraging advanced material science to deliver products that excel in performance and longevity, even under extreme operating conditions.
Our PU formulations are meticulously developed to provide optimal performance. The following list details the core characteristics of our standard PU material grades.
This table illustrates why PU from Kaxite Sealing is often the superior choice for sealing and mechanical applications.
| Property | Kaxite Sealing PU | Natural Rubber (NR) | Nitrile Rubber (NBR) | Chloroprene (CR) | Silicone (VMQ) |
|---|---|---|---|---|---|
| Abrasion Resistance | Excellent | Good | Good | Good | Poor |
| Tear Strength | Excellent | Excellent | Fair | Good | Poor |
| Oil & Fuel Resistance | Excellent | Poor | Excellent | Good | Poor |
| Ozone & Weathering | Excellent | Poor | Fair | Excellent | Excellent |
| Low-Temp Flexibility | Very Good | Excellent | Fair | Good | Excellent |
| Compression Set | Good | Good | Fair | Good | Poor |
| Cost Efficiency | Moderate to High | Moderate | Low to Moderate | Moderate | High |
We offer a comprehensive range of PU products. Below are specifications for our most common sealing profiles.
| Product Code | Profile Type | Standard Hardness (Shore A) | Temperature Range | Common Applications | Available Colors |
|---|---|---|---|---|---|
| KS-PU-D75 | D-Shape Seal | 75 ±5 | -35°C to +100°C | Door Seals, Hatch Covers, Enclosures | Black, Gray |
| KS-PU-O70 | O-Ring Cord | 70 ±5 | -40°C to +110°C | Hydraulic Rod Seals, Static Face Seals | Black |
| KS-PU-U80 | U-Channel Gasket | 80 ±5 | -30°C to +90°C | Panel Mounting, Window Glazing, Frame Sealing | Black, White |
| KS-PU-F65 | Foam Tape (Closed Cell) | 65 ±10 | -40°C to +80°C | Insulation, Vibration Damping, Light Sealing | Black, White |
| KS-PU-C85 | Custom Molded Parts | 85A to 55D | -40°C to +110°C | Wheels, Rollers, Gaskets, Bushings, Wear Pads | Custom |
Q: What are the primary advantages of using PU for seals and gaskets over other materials?
A: Polyurethane provides an outstanding balance of properties that is hard to match. Its most significant advantages include superior abrasion and tear resistance, which dramatically extends product life in high-wear applications. It also offers excellent load-bearing capacity, high tensile strength, and very good resistance to oils, greases, and ozone. While materials like NBR excel in oil resistance or silicone in high-temperature stability, PU from Kaxite Sealing delivers a robust combination that performs reliably across a broader spectrum of mechanical and environmental stresses, offering better long-term value.
Q: How does the hardness of PU affect its performance in a sealing application?
A: Hardness, measured in Shore A or D, is a critical factor. A softer (e.g., 80A-50D) provides greater mechanical strength, extrusion resistance, and durability in dynamic applications with high pressure or significant wear, such as piston seals or heavy-duty rollers. Kaxite Sealing engineers can help you select the optimal hardness for your specific pressure, surface finish, and dynamic movement requirements.
Q: Can Kaxite Sealing A: Yes, our standard
Q: What is the difference between Cast Polyurethane (CPU) and Thermoplastic Polyurethane (TPU) offered by Kaxite Sealing? A: The primary difference lies in their processing and some performance characteristics. Cast Polyurethane (CPU) is liquid-cast into molds and cured. It typically allows for larger part sizes, very low tooling costs for prototypes, and can achieve exceptional physical properties, making it ideal for heavy-duty rollers, industrial wheels, and large custom seals. Thermoplastic Polyurethane (TPU) is supplied as solid pellets and processed by extrusion or injection molding. It allows for faster, more automated high-volume production of consistent profiles like seal strips, tubes, and complex molded parts. Both offer excellent performance, and the choice depends on part geometry, volume, and specific property requirements.
Q: How do I properly install and maintain A: Proper installation is crucial. Ensure the sealing groove is clean, free of sharp edges or burrs, and has an appropriate surface finish. Use lubrication compatible with grade will ensure optimal service life.
Q: Does Kaxite Sealing offer custom A: Absolutely. Customization is a core strength of Kaxite Sealing. Our technical team works closely with clients to develop tailored
Typical Applications for Kaxite Sealing makes it suitable for a vast array of industries. Key application sectors include:
