Flexible PET Pouch Foldable Base Design
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Solution Overview
Problem
Plastic bottles with hard bases pose difficulties in bending and waste recovery, making it challenging to dispense viscous products like jelly beverages, as the base hardens during molding, preventing effective folding and leaving residue at the bottom.
Innovation Solution
A plastic bottle design featuring a flexible, cylindrical main unit with a crease between sections, allowing the central body to deform into a flat shape without bending the base, enabling easy dispensing of viscous products and efficient folding for waste recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the base of the bottle is made hard through stretch blow molding, then the bottle can stand upright and maintain structural stability, but the base becomes difficult to bend and cannot be folded cleanly, leaving residue at the bottom
Solution Approach 1:
The bottle body is divided into distinct sections with different rigidity characteristics: a rigid base portion for stability and a flexible main body portion for folding. This segmentation allows each part to perform its specific function without compromising the other.
Solution Approach 2:
Different parts of the bottle are given different local properties: the base is designed with high rigidity to support the bottle upright, while the main body is designed with flexibility to enable folding. This local differentiation resolves the contradiction between stability and bendability.
2Reliability
If the base is made hard during molding, then the bottle can support viscous products, but bending the base becomes difficult and a large space remains at the bottom, preventing complete dispensing
Solution Approach 1:
The bottle structure is segmented into a rigid base section that supports the viscous product and a flexible main body section that can be folded to empty the product completely. This allows the rigid base to maintain product support while the flexible body enables complete dispensing.
Solution Approach 2:
Instead of making the entire bottle rigid to support viscous products, the invention inverts the approach by making only the base rigid and the main body flexible, allowing the flexible portion to be folded for complete product evacuation.
3Ease of operation
If the entire bottle is made flexible to allow folding, then waste recovery becomes efficient, but the base cannot support the bottle upright and cannot hold viscous products
Solution Approach 1:
The bottle is segmented into a rigid base portion that provides upright support and a flexible main body portion that enables folding for waste recovery. This segmentation allows both contradictory requirements to be satisfied in different parts of the same structure.
Solution Approach 2:
Different local qualities are assigned to different parts: the base has high rigidity for upright support while the main body has high flexibility for folding. This local quality differentiation resolves the contradiction between support capability and folding capability.
Data Source
AI summary
A plastic bottle is provided with a mouth, a main unit, for example, a flexible, cylindrical main unit, connecting the interior of the bottle with the mouth, a base structured to close the bottom portion of the main unit and have a greater rigidity compared to the main unit. The main unit includes a lower body section extending upward from the base, a central body section extending upward from the lower body section, and a crease between the lower and central body sections. The central body section can be configured to deform into a substantially flat shape through the action of external force F so as to bend outward.