Continuous Bagging of Tacky Polymer Pellets
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing systems for extruding, pelletizing, drying, and bagging tacky polymers face challenges such as pellet sticking, inefficient drying, and material waste due to non-continuous processes and inadequate packaging methods, which lead to handling issues and environmental concerns.
Innovation Solution
A continuous process and system that uses counter and transport air flows to dry pellets within a centrifugal dryer, followed by conditioning units for further drying and coating, allowing pellets to flow freely from pelletization to bagging, and employs a multi-port valve for controlled diversion and bagging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional packaging methods are used to prevent sticking, then individual pillows can be protected from adhering, but the process becomes expensive and complex to implement on an industrial scale
Solution Approach 1:
The invention extracts the essential function of preventing sticking from complex individual packaging and concentrates it into a simple anti-stick coating layer applied to the container interior surface. This eliminates the need for individual pillow coating while maintaining the anti-stick function throughout the mass of adhesive pillows.
Solution Approach 2:
The patent uses a thin, inexpensive anti-stick coating layer on the container interior that can be easily applied and removed. This coating serves its purpose during the packaging process and can be discarded or reused, avoiding the need for expensive, complex packaging structures.
2Ease of operation
If adhesive composition is removed from packaging material prior to use, then the material can be properly utilized, but further handling is required which increases complexity
Solution Approach 1:
The adhesive pillows are designed to be self-contained within the container, maintaining their own structural integrity. The anti-stick coating allows the pillows to be easily removed from the container without requiring additional handling equipment or processes, as they naturally release from the container surface.
3Productivity
If packaging material is discarded after emptying, then the container can be reused, but material waste and disposal expenditures occur
Solution Approach 1:
The patent enables easy removal of the adhesive composition from the container through the anti-stick coating, allowing the container to be recovered and reused. The coating facilitates complete emptying of the container while maintaining the container structure for subsequent reuse, thereby reducing waste and disposal costs.
4Productivity
If continuous bagging process is implemented, then productivity increases and handling is reduced, but new challenges arise in maintaining flow continuity and preventing sticking
Solution Approach 1:
The invention enables continuous bagging by maintaining the flow of adhesive pillows through the container and out to packaging without interruption. The anti-stick coating ensures continuous, uninterrupted flow by preventing the adhesive mass from adhering to the container walls, allowing the process to run continuously without stopping for material release or container cleaning.
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 system ensures efficient, continuous drying and bagging of tacky polymers, reducing material waste and handling requirements, while maintaining product quality and minimizing environmental impact.
Implementation Method 1
a centrifugal dryer, followed by conditioning units for further drying and coating, allowing pellets to flow freely
Implementation Method 2
A continuous process and system that uses counter and transport air flows to dry pellets within a centrifugal dryer
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Methods and systems for continuously bagging pellets formed from a tacky and/or polymer containing formulation include improved drying systems and techniques. The methods and systems may include directing a flow of air to help contain moisture within a dryer, transport pellets out of the dryer, and/or dry pellets as they move away from the dryer. The methods and systems may include conditioning (e.g., drying, coating, classifying) the pellets using a conditioning unit prior to bagging the pellets.