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Ningbo Mingli Hardware Technology Co., Ltd.
Ningbo Mingli Hardware Technology Co., Ltd. is a professional China OEM Hand Sanding Bloock Manufacturer and ODM Hand Sanding Bloock Factory, is located in Ningbo, the geographical position is very advantageous, the east of Ningbo port, the north of Hangzhou Bay. The company is committed to the development, production, and sales of pneumatic tools, and power tools polishing discs, and has been in a position in the field of polishing discs at home and abroad. The company has several technical backbone and R & D personnel, committed to product design and development.

At the same time, it has an after-sales service. The company covers an area of more than 3000 square meters, with a modern quality management system. Products are widely used in automotive, electronics, aerospace, furniture, and other industries, products are exported to Europe, America, and Southeast Asia, and with several companies to maintain a good OEM relationship.

Whether you are selecting an existing product from our catalog or have a custom need, you can discuss it with our customer service staff.

At the same time, we are committed to the development of new products to meet the different needs of different customers. We use the quality of gold and the price of brass to benefit the majority of consumers, always with integrity, professional service, and enthusiasm to serve customers.
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Hand Sanding Bloock Industry knowledge
What is the difference in hardness and flexibility of polyurethane molded hand sanding blocks compared to other polishing materials?
Compared with other polishing materials, polyurethane molded manual sanding blocks have significant advantages and uniqueness in hardness and flexibility training.
Flexibility: Polyurethane molded hand sanding blocks excel in flexibility. Due to its material properties, polyurethane is able to maintain a certain elasticity and ductility, which allows the polishing block to flexibly adapt to various shapes and curvatures of surfaces when used. Whether it’s the complex shape of a car body or the tiny corners of jewelry, the polyurethane-molded manual modification blocks fit easily, ensuring a uniform and smooth polishing process.
In addition, the flexibility also allows this manual modification block to show good fit when meeting different materials. Whether it is made of metal, plastic or glass, the polyurethane molded hand modification blocks can be adjusted in strength and angle to achieve the ideal polish. In the automobile manufacturing industry, this manual polishing block can easily handle various minor imperfections on the surface of the car body, giving it a mirror-like luster. In the jewelry care industry, it can also play a huge role. Whether it is metal jewelry or the surface of gemstones, this polishing block can make the jewelry shine more brilliantly through fine polishing.
Hardness: Polyurethane molded hand sanding blocks also show their uniqueness when it comes to hardness. Although polyurethane has a relatively low hardness compared to some metal or ceramic polishing materials, it is this moderate hardness that gives it its unique advantages. The moderate hardness ensures that the polyurethane molded hand sanding block is not too harsh or stiff during the polishing process. This feature makes it more flexible to adapt to different polishing needs, while avoiding the risk of scratches that may occur due to excessive hardness. The surface of jewelry is very fragile, and any minor scratches may irreversibly affect its value and beauty. Using polyurethane-molded hand-sanding blocks can effectively reduce this risk and protect the integrity of the jewelry. The moderate hardness also allows polyurethane-molded hand sanding blocks to better conform to the contours and texture of the surface being polished during the polishing process. This fit helps achieve a more even and detailed polish, especially when working on surfaces with complex shapes and textures. Whether it is metal, plastic, glass, etc., the polyurethane molded manual sanding block can achieve the ideal polishing effect by adjusting the force and angle.
Moderate hardness also ensures polishing efficiency. Too hard polishing materials may cause excessive surface wear due to excessive friction, while too soft polishing materials may reduce polishing efficiency due to insufficient friction. The polyurethane molded hand sanding block has a good balance between hardness and friction, which can ensure the polishing effect and extend the service life. In addition, due to the material properties of polyurethane, this manual sanding block can maintain a certain stability during use. Even after long-term use, its hardness and flexibility will not change significantly, ensuring the stability and consistency of the polishing effect.
In summary, compared with other polishing materials, polyurethane-molded manual sanding blocks exhibit unique advantages in terms of flexibility and hardness. Its flexibility allows it to adapt to surfaces of various shapes and curvatures, while its moderate hardness ensures the efficiency and effectiveness of the polishing process. These features make polyurethane molded hand sanding blocks ideal for automotive surface polishing, jewelry care, and more.