Lactic Acid Polymer Cheese Coating for Microbial Preservation
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Solution Overview
Problem
Current cheese coating compositions, particularly those using polyvinyl acetate copolymers, lack environmental sustainability and effective microbial preservation, leading to issues with microbial spoilage and rapid drying during ripening and storage.
Innovation Solution
Development of a cheese coating composition comprising at least 5 wt% lactic acid polymers dispersed in an aqueous phase, optionally with a plasticizer, and without added lactic acid bacteria or antimicrobial agents, which provides intrinsic protection against microbial spoilage through slow hydrolysis of lactic acid, acting as a food-grade antimicrobial.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polyvinyl acetate copolymer emulsion is used for cheese coating, then the coating provides protection during ripening and prevents rapid drying, but the coating lacks environmental sustainability and effective microbial preservation
Solution Approach 1:
The invention changes the chemical composition parameters by replacing synthetic polyvinyl acetate copolymers with natural lactic acid polymers derived from renewable milk sources. This substitution maintains the coating's protective function while improving environmental sustainability and introducing intrinsic antimicrobial properties through the lactic acid polymer structure
Solution Approach 2:
The lactic acid polymer coating provides self-service antimicrobial protection through its inherent ability to slow down microbial growth and spoilage processes. The coating composition itself, without requiring added lactic acid bacteria or antimicrobial agents, generates the preservative effect through the slow hydrolysis of lactic acid from the polymer structure
2Ease of operation
If conventional polymer emulsion is applied to cheese surface, then the coating remains on the cheese during drying, but the coating requires sufficiently low viscosity for application and sufficiently high viscosity to remain on cheese
Solution Approach 1:
The invention optimizes the viscosity parameters of the lactic acid polymer aqueous dispersion to achieve the desired balance. The dispersion is formulated to have low enough viscosity for easy application on the cheese surface while maintaining high enough viscosity to ensure the coating remains on the cheese during the drying process, forming an appropriate protective film
3Reliability
If lactic acid polymers are used in cheese coating, then intrinsic protection against microbial spoilage is provided through slow hydrolysis, but the coating requires at least 5 wt% lactic acid polymer content
Solution Approach 1:
The invention establishes the minimum concentration parameter of 5 wt% lactic acid polymer in the aqueous dispersion as the threshold required to achieve effective intrinsic antimicrobial protection. This concentration ensures sufficient lactic acid release through slow hydrolysis to inhibit microbial spoilage while maintaining the coating's functional properties
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 lactic acid polymer-based coating composition offers improved protection against microbial spoilage and undesirable drying, enabling the production of cheeses with enhanced storage stability and environmental sustainability by utilizing renewable milk-derived materials.
Implementation Method 1
provides intrinsic protection against microbial spoilage through slow hydrolysis of lactic acid
Implementation Method 2
acting as a food-grade antimicrobial
Implementation Method 3
prevents rapid drying of the cheese by excessive evaporation of water from the cheese
Data Source
AI summary
The invention relates to an improved method for coating a cheese, wherein a coating composition comprising lactic acid polymer, is applied to a surface of the cheese, wherein the coating composition (i) does not comprise an addedsource of lactic acid bacteriaand (ii) comprises free carboxylic acidand/or free carboxylate groups. The invention also relates to the corresponding coating composition, use thereof for coating cheese and the coated cheeses. It was found that the cheesecoating compositions according to the invention are an excellent renewable and environmentally friendly alternative to petrochemical-based coatings such as polyvinyl acetate coatings.