1、Key Considerations for Storing Compostable Bags
Compostable packaging bags are designed to degrade within six months and typically have a shelf life of about one year. If you are planning to purchase and store these bags for resale or packaging, it is crucial to be mindful of several important factors to maximize their usability.
Packaging Methods
To properly store compostable bags, package them in self-adhesive bags with at least two 6mm air holes to ensure adequate airflow. This prevents the buildup of heat and moisture that could accelerate degradation. Avoid using excessive amounts of clear adhesive tape without air holes, as this can trap hot air inside the packaging and reduce the bags' shelf life.
Storage Environment
- High Temperatures: In areas where temperatures exceed 35°C, avoid storing compostable bags for more than three months, as high temperatures can shorten their shelf life by 10-20%.
- Low Temperatures: Similarly, in cold environments where temperatures can drop to -25°C, long-term exposure (four months or more) can also reduce shelf life by 10-20%.
- Humidity: Keep the storage carton dry, and if the environment is humid, cover the carton with a polybag to prevent moisture from reaching the bags. A well-wrapped polybag can help avoid water vapor damage.
Timing of Use
To ensure the bags remain in good condition, avoid preparing or storing them too far in advance. Over time, compostable bags become brittle as they near the end of their shelf life. Instead, arrange for the manufacturer to produce bags close to the time of need. For small orders, it’s better to request fresh production rather than storing them in a warehouse for extended periods. If you opt for stock bags, always check the production date to gauge remaining shelf life.
Shelf Life Management
Compostable bags generally have a shelf life of one year from the date of production. Factoring in production time (10-20 days) and shipping (7 days by courier or up to 30 days by sea), it’s essential to carefully calculate and plan the time required for manufacturing, delivery, and additional packaging processes. This will help you manage inventory effectively and avoid excess stock that may expire.
Prioritize Fresh Production
Whenever possible, avoid keeping large quantities of compostable bags in stock. Instead, aim for freshly produced bags to ensure maximum shelf life and quality. Partnering with a manufacturer who can accommodate small minimum order quantities (MOQs) and has quick production turnaround times will greatly benefit your business.
Summary of Shelf Life Considerations
- Storage Conditions: Temperature and humidity significantly affect shelf life.
- Geographical Impact: Different temperature zones will impact bag longevity.
- Retail Environment: Variations in environmental conditions in different retail locations can also influence shelf life.
By taking these factors into account, you can ensure that your compostable bags are stored correctly and remain in optimal condition for as long as possible.
2、Shelf Life of Common Compostable Bags: What You Need to Know
Compostable bags are a sustainable choice, but their shelf life varies depending on the type of bag and storage conditions. Here's a breakdown of the expected shelf life for different types of compostable bags and how various environments impact their longevity.
Shelf Life by Type of Compostable Bag
Impact of Different Storage Conditions
- High-Temperature Areas: With temperatures ranging from 18-38°C, compostable bags typically last 10-12 months. Heat can degrade the material faster, especially in regions near the equator.
- Low-Temperature Areas: In colder climates (between -35-15°C), compostable bags may become brittle, also resulting in a reduced shelf life of around 10-12 months.
- Moderate and Temperate Regions: In regions with temperatures between 10-28°C, compostable bags fare better, often maintaining their integrity for 12-15 months, and sometimes up to 20 months.
Shelf Life in Different Retail Environments
- Department Stores: Compostable bags stored on shelves or in warehouse conditions where air conditioning or heating is available generally have a shelf life of 12-15 months due to the controlled environment.
- Underground Stores: The stable temperatures of underground stores, which are naturally cooler in summer and warmer in winter, create optimal conditions for storage. Bags in these environments can last more than 15 months.
- Snack Bars: With less climate control (such as no air conditioning), temperatures fluctuate more, reducing the bags' shelf life to around 12-13 months.
How to Determine If a Compostable Bag Has Expired
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Check the Production Date: If you're unsure about the purchase date, look at the box label. Calculate the time since production to estimate if the bag is still within its shelf life.
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Perform a Physical Test: Even if the shelf life hasn't technically expired, test the bag by rubbing the material with your fingers or trying to tear it. If it remains intact, it is likely still usable.
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Consider Usage Time: If a bag is nearing or past its shelf life, limit its use to short-term purposes to avoid breakage or failure.
Conclusion
The longevity of compostable bags is affected by multiple factors, including the type of bag, storage temperature, and specific environmental conditions in different retail settings. Always consider these factors to ensure optimal use of your compostable packaging.
Note: The provided information serves as a general guide. Actual shelf life may vary depending on specific conditions.
3、Can You Print TUV and BPI Logos on Your Bags?
Printing the TUV and BPI logos on compostable bags is subject to strict regulations. Here are three scenarios to consider:
Scenario 1: Limited Use of Logos Without Certificate Number
You are allowed to print the TUV and BPI logos on your bags, but without the supplier's certificate number. This means you can display the logos themselves, but you must exclude any specific certification details related to the supplier.
What Symbols Can You Use?
In this situation, you can utilize other approved symbols or icons that indicate compostability, either individually or in combination, as long as they do not include the supplier’s certificate number.
Scenario 2: Use of Logos with Certificate Number Requires Authorization
If you wish to print the TUV or BPI logos along with the certificate number on your bags, authorization is mandatory. If you own the certificate, you are free to print the logo and the number. However, if you do not own the certificate, you cannot use the certificate number under any circumstances.
Scenario 3: Obtaining Authorization to Print Logos with Certificate Number
To print the logos with the certificate number, you must obtain permission from the certificate owner, usually the manufacturer. This process will involve costs, as the manufacturer must first secure authorization from TUV or BPI on your behalf. The manufacturer will charge a service fee for their efforts and keep records to ensure proper and legitimate use of the logos.
Steps to Obtain Authorization:
- Contact your supplier or manufacturer to initiate the authorization process with TUV or BPI.
- Ask for an estimate of the costs involved in obtaining the necessary permissions to print the logos with the certificate number.
Types of Compostability Labels: Home, Commercial, and Industrial
When printing compostable logos, it is important to specify the type of compostability:
- Home Compostable: Indicates the packaging is suitable for composting in a home setting.
- Commercially Compostable: Suitable for composting in commercial facilities with advanced recycling capabilities.
- Industrially Compostable: Suitable for composting in industrial facilities, which may have specific requirements and processes.