Compostable Paper Food Bag with Dual Adhesive Closure
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Solution Overview
Problem
Existing food storage bags are typically made of non-biodegradable materials that take years to degrade and release harmful chemicals when disposed, and they are impermeable to water vapor and gases, limiting the storage life of fresh food items.
Innovation Solution
A biodegradable food storage bag made from a unitary paper envelope with a water-based permanent glue and a repositionable adhesive, using Tarpon brand white butcher paper that is resistant to food fluids and allows permeation of atmospheric gases and moisture, eliminating synthetic coatings and additives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If non-biodegradable materials like polyethylene or plastic-coated materials are used for food storage bags, then the bag material provides impermeability to water vapor and atmospheric gases, but the bag takes many years to biodegrade and releases harmful synthetic chemicals when disposed in landfill or compost
Solution Approach 1:
The patent removes synthetic plastic coatings and impregnations from paper bag construction, extracting only the necessary functional properties (oil and water vapor resistance) while eliminating harmful non-biodegradable materials. The paper is treated with natural waxes or oils that provide the required barrier properties without compromising biodegradability.
Solution Approach 2:
The patent changes the material composition parameters by using paper with specific grammage (weight per area) and natural coating materials instead of synthetic plastics. This alters the permeability parameters to achieve the right balance between protecting food and allowing controlled breathing, while maintaining biodegradability.
2Object-generated harmful factors
If paper material is used for food storage bags, then the bag is biodegradable and environmentally friendly, but the paper is typically impervious to water vapor and atmospheric gases, which limits the storage life of fresh food items
Solution Approach 1:
The patent applies different properties to different parts of the paper bag structure. The exterior surfaces receive heavier coating for water and oil resistance, while the interior maintains higher permeability for breathability. This local differentiation allows the bag to provide both protection and controlled breathing for fresh food storage.
Solution Approach 2:
The patent creates a composite structure combining paper base material with natural wax or oil coatings. This composite provides the dual functionality of water/vapor resistance for food protection while maintaining the biodegradability and breathability characteristics of the natural materials.
3Object-affected harmful factors
If conventional sandwich bag materials are used, then the bags provide water vapor impermeability, but they require additional work or equipment at disposal sites and become less cost effective in the long run
Solution Approach 1:
The patent designs a disposable paper bag that is inexpensive to manufacture and dispose of, eliminating the need for complex recycling infrastructure. The bag provides sufficient protection during use through natural wax coatings, then decomposes naturally in landfills without requiring special processing equipment or facilities.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a cost-effective, environmentally friendly food storage option that degrades naturally in landfills or compost, extending the storage life of fresh food items while ensuring safe disposal and convenient use.
Implementation Method 1
a suitable single-thickness of paper that has high resistance to food fluids such as blood, juices, sauces, etc.
Implementation Method 2
admits at least some permeation of water vapor and atmospheric fluids
Implementation Method 3
permits gradual permeation of atmospheric gases and moisture
Implementation Method 4
A water-based permanent glue or cement is applied to the seams, which are folded to and cemented to form the envelope
Implementation Method 5
A biodegradable low-strength adhesive, i.e., a repositionable adhesive, is used on the envelope flap so it can be closed over the sandwich or other food item, and which allows the flap to be opened and re-closed
Data Source
AI summary
A biodegradable natural-fiber disposable food storage container for storing a serving of food is formed of an envelope made of a generally unitary blank of a suitable paper that is generally resistant to food fluids such as blood, juices, sauces, etc., but admits at least some permeation of water vapor and atmospheric fluids. Accordion-fold side panels allow the envelope to store flat and open up to accommodate the food article. Two half-panels join at an overlap to form a closed front panel. A water-based glue closes the envelope sides and base, while a repositionable adhesive on the flap closure allows the envelope to be opened and resealed.