JIS standards are established by the Japanese Standards Association (JSA) and are designed to ensure quality, safety, and efficiency in products and services. These standards cover a wide range of fields, including materials, manufacturing processes, and testing methods.
The JIS K 6380 standard, titled "Rubber Packing Material", provides a classification system for the physical properties of rubber materials used for industrial packing.
While the standard itself outlines performance requirements, it relies on other specific JIS standards for the actual preparation of test pieces. To prepare a piece according to JIS K 6380 requirements, you must follow the general procedures for vulcanized rubber. Core Reference Standards for Piece Preparation
To prepare a test piece correctly, the following standards are typically cited within JIS K 6380:
JIS K 6250: The primary standard for general procedures for preparing and conditioning test pieces for physical test methods.
JIS K 6251: Specific guidelines for preparing pieces to determine tensile stress-strain properties (often using "dumb-bell" shaped cutters).
JIS K 6253: Procedures for preparing samples for hardness testing (IRHD or Durometer methods). General Preparation Steps
Based on industrial practices for these standards, here is how you generally prepare a piece:
Material Conditioning: Before cutting, the rubber sheet should be conditioned at a standard temperature (typically ) and humidity for at least 16 hours.
Cutting: Use a standardized cutter (die) to punch out the required shape from a flat rubber sheet. For tensile tests, this is usually a No. 3 or No. 5 dumb-bell shape.
Thickness Measurement: Measure the thickness of the prepared piece at multiple points using a calibrated micrometer to ensure it falls within the specified range (often for standard sheets).
Marking: For elongation tests, apply "bench marks" (reference lines) to the narrow section of the dumb-bell using an ink that does not damage the rubber.
Surface Inspection: Ensure the piece is free from visible flaws, air bubbles, or ragged edges from the cutting process, as these will lead to premature failure during testing. Standard Resources
Official copies of the standard can be purchased or previewed through the Japanese Standards Association (JSA) or Intertek Inform.
Technical excerpts for specific materials (like CNR or NBR sheets) are often provided by manufacturers such as Togawa Rubber or Tigers Polymer. jis k 6380 pdf
Are you preparing this piece for a specific test, such as tensile strength or compression set? RUBBER SHEET
JIS K 6380 standard, titled "Rubber packing material -- Classification system," provides a critical framework for identifying and categorizing rubber materials used in sealing and packing applications. While the full PDF is a copyrighted document published by the Japanese Standards Association (JSA)
, this guide summarizes its core function, classification logic, and how to access it. What is JIS K 6380?
JIS K 6380 establishes a standardized "call-out" system for rubber materials. Much like the international or the American ASTM D2000
, it allows engineers to specify the required properties of a rubber part (such as heat resistance and oil swelling) without naming a specific proprietary compound. Key Components of the Classification
The standard uses a coded system to define the performance characteristics of a rubber material: Type (Heat Resistance):
Classified by letters (A through J) based on the material's ability to withstand sustained high temperatures. Class (Oil Resistance):
Classified by letters (A through K) based on how much the material swells when exposed to specific reference oils. Grade Numbers:
These digits specify the hardness and tensile strength requirements. Suffix Requirements:
Optional codes that define specific needs, such as ozone resistance, low-temperature flexibility, or compression set. Common Applications
This standard is primarily used in Japanese industrial and automotive manufacturing for: O-rings and Gaskets : Ensuring material compatibility with fluids. Industrial Seals : Standardizing parts across different suppliers. Quality Control
: Providing a measurable benchmark for incoming material inspections. How to Access the JIS K 6380 PDF
Because JIS standards are protected by intellectual property laws, they are generally not available for free legally. You can obtain the official PDF through these authorized distributors: JSA Group Web Store : The primary source for Japanese Industrial Standards. ANSI Webstore : An authorized reseller for international standards. IHS Markit / S&P Global
: Commonly used by engineering firms for standards subscriptions. Comparison with ASTM D2000 If you are familiar with ASTM D2000 JIS standards are established by the Japanese Standards
, you will find JIS K 6380 very similar. Both use a Type/Class system to define the "operating envelope" of the rubber. In many global projects, a material certified to one may be cross-referenced to the other, though slight differences in test methods (like specific test temperatures) mean they are not always 100% identical. from this standard?
This review of JIS K 6380 (Rubber Packing Material - Classification of Physical Properties) examines its role as a fundamental Japanese Industrial Standard for the categorization and technical evaluation of industrial rubber sheets and gaskets. Overview of the Standard
JIS K 6380 establishes a comprehensive classification system for the physical properties of rubber materials used in industrial packings. It serves as a benchmark for manufacturers and engineers to ensure material consistency and performance across various applications, ranging from simple buffers to complex chemical-resistant seals.
Key Scope: It covers general industrial rubber packing materials but specifically excludes sponge rubber, ebonite, and O-rings.
Document Length: Typically around 20 pages in its PDF format.
Historical Context: The standard has undergone several revisions (1976, 1994, 1999, 2014) to adapt to modern material science. Core Evaluation Criteria
The PDF provides standardized testing methods and classification codes for several critical performance metrics:
Hardness (Type A): Uses the durometer method to classify the material's resistance to indentation.
Tensile Strength & Elongation: Specifies minimum thresholds for durability and flexibility.
Heat Resistance: Evaluates changes in hardness and tensile strength after exposure to high temperatures (e.g., 100∘C100 raised to the composed with power C 225∘C225 raised to the composed with power C for specialized variants).
Oil Resistance: Measures volume changes when exposed to test oils, which is vital for automotive and machinery seals. Application & Material Compatibility JIS K 6380:1999 Rubber packing material - Intertek Inform
This report summarizes the JIS K 6380 standard, which governs the classification and performance requirements of industrial rubber packing materials. Overview of JIS K 6380
JIS K 6380 is a Japanese Industrial Standard titled "Rubber packing material - Classification of physical properties". It establishes a uniform system for identifying rubber materials based on their physical properties, primarily for use in industrial gaskets and seals.
Current Version: JIS K 6380:2014 (supersedes the 1999 and 1976 editions). The standard references other JIS test methods (e
Scope: Specifically defines materials for industrial rubber packings. It excludes sponge rubber, ebonite, and O-rings.
Key Reference Standards: Testing methods for these materials are defined by related standards such as JIS K 6251 (tensile stress-strain) and JIS K 6253 (hardness). Classification System
Materials are designated using a series of alphanumeric codes that define their mechanical and environmental resistance. Manufacturers like Togawa Rubber use these codes to certify their product lines. Performance Metric Evaluation Method (Typical) Hardness Durometer Type A Tensile Strength MPa (Minimum required value) Elongation % (Break point) Heat Resistance Change in properties after aging (e.g., 72h @ 100°C) Oil Resistance Volume change in test oils (e.g., IRM903) Commonly Classified Materials
Standard industrial rubber sheets often list their "JIS Corresponding No." to help engineers select the right material:
CR (Chloroprene Rubber): Balanced resistance to weather, heat, and oil. NBR (Nitrile Rubber): High resistance to oils and fuels.
Silicone (VMQ): Excellent for extreme temperatures and electrical insulation; often used in food industries.
Fluororubber (FKM): High-performance chemical and heat resistance. Where to Find the PDF
Official PDF copies are typically available through standards organizations and technical retailers. Note that these are usually paid documents:
Official Publisher: The Japanese Standards Association (JSA) provides the most current official versions.
Retailers: Platforms like Intertek Inform and AFNOR Editions sell the standard in PDF format.
JIS K 6380 - Rubber Packing Material - Standards | GlobalSpec
Based on the technical specifications and industry standards associated with JIS K 6380, I have compiled a comprehensive summary of its contents.
Note: JIS K 6380 is a Japanese Industrial Standard titled "Rubber, vulcanized or thermoplastic — Determination of hardness." It is the Japanese equivalent of ISO 48-4.
Below is the structured content breakdown of the standard, organized as if reviewing the actual PDF document.
The standard references other JIS test methods (e.g., JIS K 6251 for tensile strength). A typical requirement might be:
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