Natural Rubber Sheet

DEF Rubber: Your Premier Factory, Manufacturer, Supplier, and Exporter of High-Quality Natural Rubber Sheet. Contact us for free samples.

Defining Natural Rubber Sheets.

Natural rubber (NR) refers to natural latex collected from rubber trees, processed through procedures such as coagulation and drying to produce elastic solid material (raw rubber). Its primary chemical component is rubber hydrocarbon, typically comprising over 90%, with the remaining components including proteins, fatty acids, sugars, and other organic substances. The microstructure of natural rubber mainly consists of large molecular chain-like structures, with a wide range of molecular weights, but the majority have molecular weights around thirty thousand, resulting in high strength, reaching up to three megapascals. DEF Rubber uses high-quality natural rubber latex as raw material, incorporates other additives based on a formulation, and through a specialized wet rubber refining process, produces wear-resistant natural rubber sheets with a natural rubber content exceeding 95%. Thanks to improved process design, it preserves the unique long molecular chain structure of natural rubber, retaining its high strength and exceptional wear resistance, making it the best choice for wear-resistant rubber products under wet grinding conditions. Since its introduction to the market, it has earned customers’ trust due to its superior quality compared to peers and highly competitive pricing. It finds extensive use as wear-resistant linings in various industrial equipment, such as pump impellers, hydrocyclones, screen plates, and liners for screening equipment, conveying pipes and bends, valves and sealing components, slurry pumps, sludge pumps, and more. Additionally, it is used in products like floor scrubber squeegees and rubber timing belts. If you are interested in DEF Rubber’s wear-resistant natural rubber sheets, floor scrubber squeegees, wear-resistant rubber linings, or other products, please feel free to contact us.

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Comparison between vulcanized and uncured natural rubber sheets. The vulcanized sheet features a dense structure with stable performance and good heat resistance, while the uncured sheet, with a rough surface, serves as an essential raw material for molded rubber products.

Quick Q&A-About Natural Rubber Sheet.

Regarding ‘Natural Rubber Sheet,’ the questions people may concern themselves with and their answers usually involve the following aspects:

A1: A natural rubber sheet is a flat material made from natural rubber with good elasticity, tear resistance, and abrasion resistance. It is created by processing and curing latex collected from rubber trees.

A2: Natural rubber sheets are widely used in industrial and commercial sectors. DEF Rubber produces high-quality, abrasion-resistant rubber sheets using a wet production process, preserving the long molecular structure of natural rubber. This results in excellent wear resistance and elasticity, especially under wet grinding conditions. It’s an excellent raw material for various abrasion-resistant rubber products, such as the rubber linings of slurry pumps, mineral pumps, hydrocyclones, conveying pipes and elbows, valves, and rubber squeegees for floor scrubbers.

A3: Natural rubber sheets are made from raw rubber extracted from rubber trees through a special process, while synthetic rubber sheets are created chemically. They differ in performance, for example, natural rubber usually has better elasticity, while synthetic rubber may perform better in temperature ranges, oil resistance, and chemical resistance.

A4: The specifications of natural rubber sheets generally include color, thickness, width, length, tensile strength, and hardness (measured in Shore hardness). At DEF Rubber, these specifications can be customized according to customer needs, and features such as antistatic, high-temperature resistance, or chemical resistance can be added.

A5: When selecting the appropriate natural rubber sheet, consider the usage environment (such as temperature, exposure to oils or chemicals, etc.), the required physical properties (such as strength, hardness, extensibility, etc.), as well as color and size specifications. Also consider the product’s price, service, and environmental characteristics.

A6: Natural rubber sheets should be stored in a dry, cool environment, away from direct sunlight and contact with oils, solvents, and other chemicals. To avoid deformation, they should be stored flat or rolled up.

A7: Natural rubber is a renewable resource and unlike plastic products, it is biodegradable. However, its production and processing may involve environmental issues such as deforestation and pollution during latex extraction. Additionally, the disposal of old rubber sheets is also an environmental consideration.

A8: There are many brands that offer natural rubber products, including internationally recognized rubber manufacturers and some local suppliers. They may target different sectors. DEF Rubber, as a manufacturer and supplier of abrasion-resistant natural rubber sheets from China, offers products with quality comparable to international brands, excellent value for money, and after-sales service. If you are troubled by the high prices of current products or sluggish after-sales service, we would be delighted for you to contact us.

A9: The price of natural rubber sheets is influenced by various factors, including raw material costs, market supply and demand, transportation expenses, specifications, etc., and is not fixed, fluctuating with the price of raw materials. Prices are usually calculated per square meter or per kilogram. Moreover, the price is closely related to the quantity purchased; costs can be reduced through wholesale or bulk purchases. DEF Rubber, as a professional natural rubber sheet factory, offers products with great cost-effectiveness.

A10: When purchasing, one should check whether the product meets relevant quality standards and certifications, such as ISO and ASTM standards. If you are uncertain, you can try testing a small sample. DEF Rubber can provide a free sample service.

  • Visually check whether the rubber sheet surface is smooth and even, if the material color is consistent without apparent impurities or bubbles.
  • Check if the rubber sheet has an abnormal odor (low-quality rubber may have a pungent chemical smell).
  • Look at the product’s physical performance report, such as tensile strength, elongation rate, hardness, etc., to test whether the product performance meets the requirements.
  • Extrusion molding: Using an extruder to extrude rubber into the desired shape and thickness.
  • Calendering: Using two or more rollers to press the rubber into a sheet form.
  • Vulcanization process: Improving the rubber’s elasticity and stability through heating and adding sulfur or other curing agents.
  • Shredding and Reuse: Old rubber sheets can be shredded into granules and used in the production of new rubber products.
  • Energy Recovery: Rubber can be converted into reusable energy materials through processes like pyrolysis.
  • Material Recovery: Waste rubber can be utilized in the production of composite materials, artificial soil, and other products.
  • Quality of Raw Materials: The purity and freshness of latex directly influence the quality of the product.
  • Processing Procedures: The precision of steps such as mixing and vulcanization is critical.
  • Types and Proportions of Additives: For instance, the use of carbon black, sulfur, accelerators, etc.

A15: It is necessary to ensure that natural rubber sheets meet the safety standards for food-grade or medical-grade materials, such as the standards set by the FDA (Food and Drug Administration), before use.

A16: Blades, scissors, or cutting machines are used for cutting. For precise dimensions, professional cutting equipment must be used. When creating holes, specialized punching machines and tools are employed.

A17: Yes, rubber sheets usually have a standard thickness, depending on the manufacturer and the specific application needs. Users should choose according to their own needs and manufacturers’ recommendations.

A18: Natural rubber becomes hard and brittle at low temperatures, softens at high temperatures, and can age more quickly when exposed to UV light over long periods.

A19: Yes, specific patterns or textures can be added during the production of natural rubber sheets, typically achieved using textured rollers during the calendering process.

A20: Yes, there are products that combine the properties of both, such as improved temperature resistance or cost-effectiveness, which are common in applications like tires and industrial belts.

A21: Natural rubber sheets are generally sensitive to UV light and ozone, which can lead to accelerated aging when exposed to the outdoors for extended periods. Some rubber sheets are enhanced with antioxidants and UV stabilizers to improve their weather resistance.

A22: Natural rubber is sensitive to certain chemicals and oils, which can cause the material to swell, soften, or crack. If these substances are present in the application environment, specially treated or synthetic rubber alternatives might be necessary.

A23: Natural rubber is not inherently highly fire-resistant, but its safety performance can be enhanced by adding fire retardants.

A24: Yes, natural rubber sheets can be bonded with other materials using adhesives to provide additional characteristics such as enhanced wear resistance, corrosion resistance, waterproofing, and insulation. Wear-resistant rubber linings have a very wide application in fields such as mining.

A25: Changes in weather, political stability, and international market demands can all affect the production and supply of natural rubber, leading to price fluctuations and consequently impacting its supply chain.

A26: Laboratory tests, such as Infrared Spectroscopy or Gas Chromatography-Mass Spectrometry, can identify compounds and potential impurities in the rubber.

A27: Some individuals may be allergic to the proteins in natural rubber. This is of particular concern for medical devices or applications where there is direct contact with skin.

A28: The tensile strength of natural rubber sheets depends on their composition and thickness, typically ranging from 3 to 35 MPa. DEF Rubber’s natural rubber sheet products are known for their excellent wear resistance and tear strength.

A29: Natural rubber is an excellent electrical insulator and is therefore commonly used in electrical insulation applications. For areas with high insulation requirements, rubber products with enhanced insulation effects can also be customized.

A30: Minor damage can be repaired using specific rubber repair kits or rubber glue. The repair process may vary for different applications, so please consult your material supplier for specific methods.

A31: Natural rubber has relatively low thermal conductivity, which makes it often used in applications where insulation is needed.

A32: This depends on the application and the wear condition of the rubber sheet. Some natural rubber sheets can be reused multiple times if they are not overly worn, but their performance may gradually decline with time and frequency of use.

A33: Different brands may use different sources of raw materials, formulations, and processing techniques, all of which can affect the quality and performance of the final product. Therefore, testing samples before large-scale use when switching suppliers is a reliable approach.

A34: Most natural rubber is biodegradable under the right conditions, but this process can take a long time, and the addition of certain chemical additives may affect its biodegradability.

A35: Yes, although natural rubber is typically limited in color, it can be produced in various colors by adding pigments. DEF Rubber’s wear-resistant natural rubber sheets are generally red, but if you require other colors, please inform us in advance.

A36: Recycled rubber sheets are usually harder in texture, less elastic, and may contain some impurities. They also tend to have a significantly different smell compared to natural rubber, which is typically softer and more elastic.

A37: Under proper storage conditions, natural rubber sheets can have a shelf life of several years. However, rubber can age over time, gradually becoming harder and losing elasticity, so it is advisable not to stockpile large amounts of rubber sheet products at once.

A38: The organic components of natural rubber might attract certain insects, such as termites.

A39: One can evaluate the supplier’s track record, market reputation, and most importantly, the quality of their products and after-sales service. Good product quality and excellent after-sales service can reduce many communication costs. Sometimes we may be constrained by product brands and pay a multiple of the price, so appropriate experimentation may help us find a more ideal supplier.

A40: The density of natural rubber sheets is not a fixed value and can vary depending on the specific formula and additives used during the manufacturing process. In certain applications, the precise density value can be crucial for product design and performance requirements. To obtain the most accurate data, one should refer to the technical specification sheets provided by the manufacturer or directly contact them for specific product information.

A41: The sustainability of natural rubber depends on its production practices. Sustainable rubber cultivation should follow eco-friendly agricultural practices to avoid over-harvesting and environmental degradation.

A42: The HS code (Harmonized System code) for natural rubber sheets may vary slightly based on the specific product type and form. The HS code is an internationally standardized system of names and numbers for classifying traded products to determine tariff classifications. Natural rubber (unvulcanized) generally falls under HS Chapter 40, and the subcategories within it may include codes for natural rubber sheets, for example: 4001.29 — “Other forms of natural rubber”. Processed rubber products like rubber sheets might fall under different codes. It should be noted that the exact code can vary by country, as nations may make minor adjustments to the international HS codes to suit their own tariff and trade requirements. To determine the correct HS code for a specific product, one usually needs to contact the supplier or refer to the national tariff nomenclature. The correct HS code is crucial for international trade as it affects the calculation of tariffs and the customs clearance process for goods.
The HSN code (Harmonized System of Nomenclature code) is actually based on the HS codes (Harmonized Commodity Description and Coding System) and is used to ensure goods are classified uniformly across the globe.

DEF rubber Wear-Resistance Natural Rubber Sheet

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