Dictates how long a sample must sit in an air-circulating oven (e.g., 70 hours at 100°C) before re-testing its physical properties. The standard limits how much hardness or tensile strength the material is allowed to lose.
| Scale Type | Method | Indenter Type | Application Range | | :--- | :--- | :--- | :--- | | | Standard (N) | Ball (2.5mm) | Standard rubber hardness (30 - 95 IRHD). | | | High Modulus (H) | Ball (1.0mm) | Hard rubber (85 - 100 IRHD). | | | Low Modulus (L) | Ball (5.0mm) | Soft rubber (10 - 35 IRHD). | | Shore | Shore A | Truncated Cone | Soft to medium-hard rubber. Most common for general rubber products. | | | Shore D | Cone (Pointed) | Hard rubber, ebonite, and hard thermoplastics. | | | Shore E | Ball (Spherical) | Used for very soft materials (less common in some int'l standards, retained in JIS). |
Industries that rely on the specifications within the include:
The first letter designates the rubber's resistance to petroleum-based oils, which typically correlates to the polymer type. Class Letter Oil Resistance Level Volume Swell (Max) Typical Polymer No requirement Unspecified NR, SBR, EPDM B Low resistance Under 120% Chloroprene (CR / Neoprene) C Medium resistance Nitrile (NBR - Medium) D High resistance Nitrile (NBR - High), Viton (FKM) 2. Class (Second Letter): Heat Resistance
JIS K 6380 plays a pivotal role in quality assurance and standardization. It is referenced by numerous other JIS product standards, including JIS B 2404 (for pipe flange gaskets). By adhering to this classification, all parties in the supply chain can communicate specifications clearly and unambiguously, ensuring that the chosen rubber material will perform as expected under specific operating conditions. jis k 6380 pdf
: Sometimes, JIS standards are adopted or referenced by international standards organizations. Websites like ISO or ASTM might have related publications or references to JIS standards.
Measures the stress a material can withstand before breaking. JIS K 6257
: 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.
To ensure compliance with JIS K 6380, materials must undergo rigorous testing as outlined in related JIS standards. Key tests include: Related JIS Test Standard Importance JIS K 6253 Dictates how long a sample must sit in
Followed by a series of numbers that define the hardness (Durometer A) and tensile strength.
Medium oil resistance (Class C) with heat resistance up to 120°C (Class C).
If your project involves these materials, you will need to reference other specific JIS standards.
The standard has a long history, having been first established in 1959. Over the decades, it has undergone several revisions to keep pace with technological advancements and changes in industrial needs. Understanding these versions is critical for determining which revision is applicable to your project. | | | High Modulus (H) | Ball (1
When you open a official JIS K 6380 PDF, a massive section is dedicated to testing compliance. Manufacturers must test their rubber sheets using precise geometries and environmental controls:
JIS K 6380 PDF provides a comprehensive guide for testing rubber products, covering various physical and chemical properties. The standard is widely used in Japan and has been adopted by various industries, including automotive, construction, and manufacturing.
Example Code: B C D 70 10 3 2 │ │ │ ─┬─ ─┬─ ┬ ┬ │ │ │ │ │ │ └── Compression Set Max Value (5th Digit) │ │ │ │ │ └──── Elongation Min Value (4th Digit) │ │ │ │ └─────── Tensile Strength Min Value (3rd Digit) │ │ │ └─────────── Hardness Rating (1st & 2nd Digits) │ │ └────────────── 耐寒性 Cold Resistance Grade (3rd Letter) │ └──────────────── 耐油性 Oil Resistance Grade (2nd Letter) └────────────────── 耐熱性 Heat Resistance Grade (1st Letter) 1. Base Performance (Three Letters)
JIS K 6380:2014 , which replaced the 1999 version.
g., oil resistance or hardness levels) within this standard to match a material? JIS K 6380:1999 Rubber packing material - Intertek Inform
The PDF outlines the specific equipment requirements:
