Synthetic Resin Bottle Trunk Rigidity via Bottom Pressure Absorption
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Solution Overview
Problem
Existing synthetic resin bottles face challenges in preventing unsightly deformation under reduced pressure while maintaining flexibility in design and ensuring secure label attachment, as irregularities or reduced pressure absorbing panels compromise container rigidity and label area security.
Innovation Solution
A synthetic resin bottle design featuring a cylindrical trunk with a straight region devoid of irregularities and a bottom with a reduced pressure absorbing region that displaces inward, where the straight region's weight is significantly greater than the absorbing region's weight, ensuring effective pressure absorption without excessive deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If irregularities or reduced pressure absorbing panels are provided in the trunk to prevent deformation under reduced pressure, then the trunk's rigidity is improved, but the flexibility in container design decreases and the label attachment area is reduced
Solution Approach 1:
The reduced pressure absorbing function is extracted from the trunk and relocated to the bottom of the bottle. The bottom is designed with a reduced pressure absorbing region that can displace inward, while the trunk maintains a smooth cylindrical shape without irregularities, preserving design flexibility and label attachment area.
Solution Approach 2:
The bottle is divided into functional zones: the trunk serves as a smooth cylindrical structure for labeling and design flexibility, while the bottom contains the reduced pressure absorbing region. This segmentation allows each part to optimize its specific function without compromising the other.
2Strength
If irregularities or reduced pressure absorbing panels are provided in the trunk to prevent deformation under reduced pressure, then the trunk's rigidity is improved, but the label attachment area is reduced
Solution Approach 1:
The reduced pressure absorbing function is extracted from the trunk and relocated to the bottom of the bottle. The trunk maintains a smooth cylindrical shape without irregularities, preserving maximum surface area for label attachment, while the bottom contains the displaced reduced pressure absorbing region.
3Reliability
If the reduced pressure absorbing region is made larger to effectively absorb reduced pressure, then the pressure absorption capability is improved, but the weight of the bottom increases
Solution Approach 1:
The bottom is designed with variable thickness to optimize the reduced pressure absorbing region. The thickness is increased in specific areas to provide sufficient displacement capability for pressure absorption, while maintaining lighter weight in other areas, achieving a balance between pressure absorption reliability and weight reduction.
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 design effectively prevents unsightly deformation of the trunk and maintains flexibility in container design while securing the label attachment area, with the reduced pressure absorbing region displacing inward to absorb pressure, reducing the bottle's capacity by at least 25 ml, thus addressing the deformation and flexibility issues.
Implementation Method 1
reduced pressure absorbing region configured to be displaced toward an inside of the bottle in response to reduced pressure inside the bottle
Data Source
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AI summary
Provided is a synthetic resin bottle that prevents a trunk from undergoing unsightly deformation in response to reduced pressure inside the bottle and that also increases flexibility in terms of container design and secures a label attachment area sufficiently. A synthetic resin bottle (1) includes a mouth (2), a trunk (3), and a bottom (4), which is provided with a reduced pressure absorbing region (9) configured to be displaced toward the inside of the bottle in response to reduced pressure inside the bottle. The trunk (3) includes a cylindrical-shaped straight region (3a), which has a length of not less than 100 mm in an axis direction extending along a center axis C of the trunk (3) and in which no irregularities are provided. The straight region (3a) has a weight of not less than (11) times a weight of the reduced pressure absorbing region (9).