Enzymatically Modified Starch Glue for Liquid Stability
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Solution Overview
Problem
Conventional starch-based glues lack long-term stability in liquid form, making them unsuitable for storage and application in high-speed packaging processes, where quick setting and high adhesive strength are required.
Innovation Solution
Development of a glue composition using enzymatically modified starch treated with a branching enzyme, which exhibits low viscosity, high solid content, and extreme long-term stability, allowing for storage in liquid form without thickening or setting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional starch is used to make glue, then the glue can be produced easily, but it lacks long-term stability in liquid form and cannot be stored
Solution Approach 1:
The patent applies parameter changes by modifying the starch structure through enzymatic treatment with branching enzymes, which changes the degree of polymerization and molecular weight distribution. This transforms the physical-chemical parameters of starch to achieve long-term stability in liquid form while maintaining ease of manufacture
Solution Approach 2:
The patent creates a composite starch-based glue composition by combining starch with specific enzymatic modification products. The composite structure of modified starch molecules provides both the stability needed for storage and the adhesive properties required for high-speed packaging applications
2Productivity
If starch is heated to form glue paste, then the glue can be produced, but it has high viscosity and cannot be used in high-speed packaging processes
Solution Approach 1:
The patent uses enzymatic modification to change the molecular parameters of starch, specifically reducing the degree of polymerization and modifying the molecular weight distribution. This results in lower viscosity glue that can be processed at high speeds while maintaining adequate adhesive force for packaging applications
3Reliability
If amylose fraction is used in starch glue, then the starch can be processed, but it forms crystalline aggregates through retrogradation and loses stability
Solution Approach 1:
The patent applies parameter changes by selectively modifying the starch structure through enzymatic treatment to reduce amylose content or alter its configuration. The branching enzyme treatment changes the molecular parameters to prevent retrogradation while maintaining processing capability
Solution Approach 2:
The patent effectively extracts or removes the problematic amylose fraction through enzymatic modification, separating the stable amylopectin component from the retrograding amylose. This allows the glue to maintain stability without sacrificing processing ability
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 enzymatically modified starch derivatives demonstrate high bond strength and long-term stability in liquid form, enabling storage for months and rapid setting, suitable for high-speed packaging applications.
Implementation Method 1
enzymatically modified starch (EMS) which has been treated with a branching enzyme
Implementation Method 2
bond parts to be joined by surface attachment and inner strength
Data Source
AI summary
A highly homogeneous starch-based glue composition is obtained by enzymatic modification of the starch with a branching enzyme which is supplied in an enzymatically modified starch with high long-term stability. The starch has a viscosity stability index SI of less than or equal to 1.3, calculated by the quotient of viscosity after 14 days and by viscosity after 2 hours after preparation of the starch. The starch is suitable for liquid storage, which is stable in the long-term, of a ready-to-use paste with a high bonding strength.