Food-Contact Plastic Surface Treatment for Better Cleanability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing solutions for increasing the cleanability of plastic surfaces in contact with foodstuffs face issues such as incompatibility, high costs, environmental impact, and insufficient cleanability without coatings, particularly for plastic materials.
Innovation Solution
A process involving the treatment of plastic surfaces with a gas mixture containing 3-5% fluorine and 10-16% oxygen, at specific pressures and times, to enhance cleanability without the need for coatings, ensuring compatibility with foodstuffs and reducing detergent use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fluorinated polymer coatings (PTFE, FEP, PFA) are applied to prevent food adhesion, then cleanability and anti-stick properties are improved, but food safety compatibility deteriorates due to potential contamination risks
Solution Approach 1:
The patent extracts and eliminates the harmful fluorinated polymer coating layer while retaining the desired anti-adhesion and cleanability properties through alternative means (surface treatment or different material composition), directly resolving the contradiction between cleanability improvement and food safety compatibility
Solution Approach 2:
The patent employs food-safe alternative materials or treatments that can be used without the long-term safety concerns associated with fluorinated coatings, effectively replacing the problematic coating with safer, potentially shorter-lived or naturally degradable alternatives
2Object-affected harmful factors
If ceramic coatings are applied to ensure food compatibility, then food safety compatibility is improved, but manufacturing cost deteriorates
Solution Approach 1:
The patent employs cost-effective food-safe materials or treatments that achieve the same food compatibility function as expensive ceramic coatings, replacing high-cost solutions with more economically viable alternatives
Solution Approach 2:
The patent changes the material parameters or surface treatment parameters to achieve food safety compatibility through less expensive means, such as using naturally food-safe plastics or simpler surface treatments instead of costly ceramic applications
3Ease of operation
If fluorine-containing treatment gas is used to improve cleanability of plastic surfaces, then cleanability is improved, but environmental impact deteriorates
Solution Approach 1:
The patent modifies the gas composition parameters by reducing or eliminating fluorine content while maintaining cleanability effectiveness through alternative active ingredients, thereby reducing environmental impact
Solution Approach 2:
The patent converts potentially harmful fluorinated treatments into environmentally benign processes by using alternative gases or treatments that achieve the same cleanability improvement without the negative environmental consequences
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 process significantly improves cleanability, allowing for effective cleaning with hot water alone, reduces detergent usage, and maintains compatibility with foodstuffs, while being economically viable and environmentally friendly.
Implementation Method 1
treating (E) at least the surface of the article 1 in a reaction chamber with a treatment gas, having a composition comprising from 3% to 5% in volume of fluorine, from 10% to 16% in volume of oxygen
Implementation Method 2
a treatment gas, having a composition comprising from 3% to 5% in volume of fluorine, from 10% to 16% in volume of oxygen
Data Source
Figure 1~2
AI summary
An article suitable for contact with foodstuffs, comprising at least a contact surface made of plastic material, which contact surface is suitable and destined for use and for direct contact with foodstuffs, characterised in that at least the contact surface is pretreated with a treatment gas having a composition comprising from 3% to 5% in volume of fluorine, from 10% to 16% in volume of oxygen, and at least a further inert gaseous component, at an absolute pressure of the treatment gas comprised between 333mbar and 400mbar and for a treatment time comprised between about 10 and about 180 seconds, the contact surface exhibiting, following the treatment with the treatment gas, an improved cleanability with respect to the same contact surface before the treatment.