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New Field Testing Service for Marine Biodegradable Plastics

On September 1, 2025, the Tokyo Metropolitan Industrial Technology Institute (TIRI) will launch a new service to test the biodegradability of marine biodegradable plastics in actual ocean conditions. This field testing service is designed in accordance with the latest international standard, ISO 16636:2025, which was released in April 2025. It aims to provide reliable data to support manufacturers of marine biodegradable plastics and downstream companies considering product development.

Background

As global awareness of the marine plastic waste crisis grows, the proliferation of marine biodegradable plastics has been identified as one potential solution. There is a distinct demand for proof of biodegradability in real ocean environments, which cannot be adequately simulated in laboratory tests. Companies are increasingly seeking internationally-recognized methods to measure the degradation of these materials.

What are Marine Biodegradable Plastics?

Marine biodegradable plastics are types of resin materials that can ultimately break down into carbon dioxide and water through the action of microorganisms in the ocean environment. This ability to decompose effectively under marine conditions is crucial for combating pollution and reducing landfill waste.

Importance of ISO-Compliant Field Testing

1. Real-World Data:

The field tests can provide actual measurements of degradation that are not possible in lab settings. For example, data on the disintegration of materials in Tokyo Bay can be collected over a three-month period, including assessments at one and two months.

2. Objective Evidence:

Compliance with ISO 16636 yields test data that can be used as strong evidence to present environmental performance to both domestic and international market partners and consumers. The credibility of the findings helps to reinforce trust in the effectiveness of marine biodegradable plastics.

Field Testing Overview

Testing Methodology:

• - The testing will involve immersing samples in the ocean and measuring changes in weight and thickness before and after immersion to ascertain the amount of degradation.

Example Testing Conditions:

• - Samples will be immersed in Tokyo Bay for three months, with data collected at one and two months to track progress.

Testing Fees:

• - For small to medium-sized enterprises, fees will start at around ¥80,000, while general enterprise costs will begin at approximately ¥160,000 for a three-month immersion with data collected twice.

Upcoming Disclosure Event

Event Details

• - Name: Research Presentation and Headquarters Open Day – TIRI Cross Meeting 2025
• - Date: Thursday, September 4, and Friday, September 5, 2025
• - Location: TIRI Headquarters, Koto City, Aomi
• - Content: The event will present case studies of the field tests conducted on three types of resins in Tokyo Bay.

With these sustainable practices, TIRI aims to play an essential role in promoting the use of marine biodegradable plastics, thus contributing to the global effort of tackling marine pollution effectively.