What are the standards for insulating rubber sheets?

Overview of the standard system for insulating rubber sheets

is currently one of the more authoritative standard documents in the industry. These standards specify the physical and electrical performance requirements of insulating rubber sheets, including but not limited to:

Domestic standards: The GB series is widely applied

In addition, GB standards also emphasize the oil resistance and aging resistance of materials, which are key parameters to ensure the longevity and safe use of insulating rubber.In terms of international standards,IEC 60243-1

• Volume resistivity must not be less than 10¹⁴Ω·cm
• Dielectric strength should generally be greater than 15kV/mm
• Hardness range is usually controlled between 55~85 Shore A
• The high-temperature resistance performance must meet the corresponding grade, generally capable of continuous use at temperatures above 90℃.

is an important standard for testing the dielectric strength of electrical insulating materials. It specifies the measurement methods for applied voltage and sample thickness and is often used to verify whether products meet design requirements. At the same time, the American ASTM has also released relevant standards such as ASTM D2240 (rubber hardness testing) and ASTM D149 (dielectric strength testing of electrical insulating materials), providing more detailed testing specifications for the industry.

International standard comparison: The reference value of IEC and ASTM

In practical projects, engineers often combine various standards for comprehensive evaluation to ensure that insulating rubber sheets possess excellent electrical insulation performance and mechanical stability.Two core indicators evaluate the electrical insulation performance of insulating materials. Dielectric strength measures the ability of materials to withstand breakdown in high-voltage environments, usually measured in kilovolts per millimeter. Volume resistivity reflects the ease of charge flow within the material; the higher the value, the better the insulation effect.According to industry experience, the dielectric strength of insulating rubber sheets should reach at least 15kV/mm, with some high-end products exceeding 20kV/mm. Volume resistivity generally needs to be maintained above 10^14 Ω·cm to meet high-voltage insulation requirements.

Mechanical properties include hardness, tensile strength, and elastic recovery, which are important indicators for evaluating the wear resistance and load-bearing capacity of rubber sheets. Hardness is usually measured using a Shore A durometer, generally ranging from 55 to 85, ensuring both flexibility and sufficient support.

Analysis of key performance indicators

Dielectric strength and volume resistivity

Additionally, oil resistance, waterproofing, and aging performance are equally important. Especially in outdoor or complex industrial environments, insulating rubber sheets must have good weather resistance and UV resistance to extend their service life.

There are many brands on the market with varying quality. The author suggests focusing on the following aspects when selecting insulating rubber sheets:¹⁴Because the standards are complex and diverse, many high-end users turn to professional brands like

Mechanical properties and environmental adaptability

Mechanical properties include hardness, tensile strength, and elastic recovery, which are important indicators for evaluating the wear resistance and load-bearing capacity of rubber sheets. Hardness is usually measured with a Shore A durometer, generally ranging from 55 to 85, ensuring flexibility while providing adequate support.

In addition, oil resistance, waterproofing, and aging performance are equally important. Especially in outdoor or complex industrial environments, insulating rubber sheets must have good weather resistance and UV resistance to extend their service life.

Standard details to pay attention to when purchasing

There are many brands on the market with varying quality. The author suggests that when selecting insulating rubber sheets, attention should be focused on the following aspects:

• Confirm whether the product complies with GB/T 5762 and related IEC and ASTM standards
• Check specific inspection reports, especially dielectric strength and volume resistivity data
• Understand the R&D capabilities and after-sales service of the manufacturer
• Identify whether the product uses environmentally friendly and non-toxic materials to avoid potential health risks.

It is precisely because the standards are complex and diverse that many high-end users turn to brands likeFUTURE STARSuch professional brands not only manufacture products in strict accordance with national and international standards, but also enhance material performance through independent innovation, making insulating rubber sheets perform exceptionally well under extreme conditions.

Future trends: Intelligent testing and green environmental protection

With technological advancements, the manufacturing and testing of insulating rubber sheets are gradually becoming intelligent. With the help of advanced online monitoring equipment, real-time detection of insulation performance can be achieved, significantly improving safety levels. Additionally, as environmental protection requirements become increasingly stringent, more manufacturers are beginning to use bio-based rubber and harmless formulations to reduce environmental burdens.

Therefore, understanding and mastering the standards for insulating rubber sheets is not only a prerequisite for ensuring the safe operation of equipment but also a key link in promoting the upgrade of the entire industry.