Fruit Coating Film for Ripening Control and Moisture Retention

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Solution Overview

Problem

Existing methods for controlling fruit and vegetable ripening, such as ethylene treatment, require additional cleaning steps and are economically inefficient, and fail to adequately control moisture loss and ripening progression.

Innovation Solution

A coating film containing a surfactant with a long-chain aliphatic group is applied to fruits and vegetables, which suppresses moisture loss and allows controlled permeation of ripening agents, enabling precise ripening management.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of substance

If a packaging film is used to suppress transpiration, then moisture loss is reduced and freshness is maintained, but ethylene cannot sufficiently permeate the film to promote ripening

Engineering Contradiction:

Improvemoisture lossVSAvoidethylene treatment effectiveness

Core Design Contradiction:

Loss of substanceVSEase of manufacture

Solution Approach 1:

The patent applies a coating containing ethylene and ripening promoters to the fruit surface before packaging. This preliminary action ensures that ripening is initiated and controlled before the fruit is sealed in the packaging film, allowing ethylene to effectively promote ripening without being blocked by the packaging film during the critical ripening phase

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent uses a coating composition as an intermediary that contains both ethylene and ripening promoters. This coating acts as a mediator that delivers the ripening agents directly to the fruit surface and facilitates ethylene's action, enabling effective ripening control while the packaging film subsequently maintains moisture without blocking ethylene

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If ethylene treatment is performed before packaging, then ripening is promoted, but moisture loss occurs during treatment

Engineering Contradiction:

Improveripening speedVSAvoidmoisture loss

Core Design Contradiction:

ProductivityVSLoss of substance

Solution Approach 1:

The patent merges the functions of ripening promotion and moisture protection into a single integrated system. The coating composition combines ethylene and ripening promoters applied before packaging, while the packaging film provides moisture barrier function. This combination allows rapid ripening through ethylene treatment and simultaneous moisture loss prevention through the packaging film, eliminating the need to choose between the two opposing requirements

Inventive Principle:

Principle #5Merging (Combining)

3Loss of substance

If a protective coating is applied to slow respiration, then ripening rate is reduced and moisture loss is decreased, but an additional cleaning step is required to remove the coating for rapid ripening

Engineering Contradiction:

Improvemoisture lossVSAvoidprocess steps

Core Design Contradiction:

Loss of substanceVSDevice complexity

Solution Approach 1:

The patent inverts the conventional approach by applying the coating containing ripening agents before packaging rather than after. This reversal eliminates the need for a cleaning step to remove a protective coating, as the coating itself serves as the vehicle for delivering ethylene and ripening promoters to initiate and control the ripening process

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The coating composition serves multiple functions: it acts as a delivery vehicle for ethylene and ripening promoters, provides a controlled release mechanism for ripening agents, and eliminates the need for separate cleaning and ripening treatment steps. This multi-functionality simplifies the overall process by combining what would otherwise be separate operations into a single integrated treatment

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 method effectively controls the ripening process while maintaining freshness by reducing transpiration and allowing targeted ripening progression, enhancing commercial value and reducing disposal losses.

Implementation Method 1

transpiration of many fruit/vegetable products is suppressed by using a packaging film

Methodology Applied

Scientific EffectTranspiration suppression: Transpiration

Implementation Method 2

ethylene does not sufficiently act because of insufficient permeation

Methodology Applied

Scientific EffectPermeation: Permeation

Implementation Method 3

a protective coating that slows down respiration is formed on a surface of an agricultural product

Methodology Applied

Scientific EffectRespiration control:

Data Source

PatentUS20260020580A1Method for controlling degree of ripening of fruits and vegetables provided with coating film

Publication Date: 2026.01.22 MITSUBISHI CHEM CORP

AI summary

A method for controlling the ripening degree of a fruit/vegetable, the method including bringing a coated fruit/vegetable having a coating film formed on a surface, into contact with a ripening degree controlling substance, wherein the coating film contains a surfactant containing a long-chain aliphatic group in its chemical structure, and has a ratio of a total endothermic peak area A1 in a range of 0° C. or higher and 40° C. or lower to a total endothermic peak area A2 at 0° C. or higher and 80° C. or lower of 50% or less in differential scanning calorimetry with a measurement temperature range of 0° C. or higher. According to the present invention, it is possible to provide a method for controlling the ripening degree of a fruit/vegetable as necessary while keeping freshness of the fruit/vegetable.