Beetroot Pulp Adhesive for Corrugated Cardboard Bonding
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Solution Overview
Problem
Current adhesive compositions for corrugated cardboard, primarily based on starch, face challenges in achieving optimal adhesiveness and texture due to variations in gelation time and water retention, leading to inconsistent bonding strength.
Innovation Solution
Incorporating beet pulp into the adhesive composition, specifically combining it with cellulose, hemicellulose, and modified starch, enhances adhesiveness and texture by improving gelatinization and water retention, while using a Stein-Hall process for preparation ensures efficient application and bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If starch is used as the adhesive base, then the adhesive composition can be applied efficiently in corrugated cardboard manufacturing, but the adhesiveness and bonding strength are inconsistent due to variations in gelation time and water retention
Solution Approach 1:
The patent combines starch with beet pulp and cellulose derivatives to create a composite adhesive material. This composite structure allows the beet pulp to modify the gelation characteristics of starch, providing more consistent bonding strength and adhesiveness while maintaining the efficiency of starch-based application methods in corrugated cardboard manufacturing.
2Strength
If gelation time is extended to improve bonding strength, then more energy and time are required, but the bonding occurs too late to resist cutting of the resulting cardboard
Solution Approach 1:
The patent modifies the gelation parameters of starch by adding beet pulp and cellulose derivatives. This changes the gelation kinetics to occur at lower temperatures and more controlled rates, allowing bonding to occur at the optimal moment during the corrugation process without requiring excessive energy or time, thus preventing late bonding that cannot resist cutting.
Solution Approach 2:
The beet pulp acts as an intermediary substance that mediates between the starch and the cardboard surfaces. It modifies the gelation process to occur at the right time and temperature, ensuring strong bonding without requiring extended gelation periods that would waste energy and time.
3Reliability
If too much water evaporates during drying, then the humidity in the groove is too high and the bond will not hold, but the drying process requires energy control
Solution Approach 1:
The patent changes the evaporation parameters by incorporating beet pulp and cellulose derivatives that modify the water retention characteristics of the adhesive. This allows controlled water evaporation during drying, maintaining optimal humidity levels in the groove while reducing the energy required for the drying process, thus ensuring bond holding without excessive energy consumption.
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 addition of beet pulp to the adhesive composition significantly increases adhesiveness, improves texture, and enhances bonding strength, both in the gelatinized and dry states, leading to more robust and consistent corrugated cardboard production.
Implementation Method 1
it is the heat in this oven which ensures the gelatinization of the starch and which creates a gel and therefore a bond between the cardboard sheets
Implementation Method 2
If too much water evaporates during drying, then the humidity in the groove is too high and the bond will not hold
Data Source
Figure 1~2
Figure 3
AI summary
The present invention relates to an adhesive composition, preferably for corrugated cardboard, comprising: cellulose; hemicellulose; starch; sodium hydroxide; boric acid or one of its derivatives, such as borate or borax; and water.