Cyclic Olefin Polyethylene Squeeze Bottle for Stable Droplet Control
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Solution Overview
Problem
Squeeze bottles for housing liquid compositions, particularly for ophthalmological use, face challenges in achieving excellent operability for dripping or pouring, with existing designs failing to ensure easy application and stable control of droplet or pour amounts.
Innovation Solution
An integrally formed squeeze bottle made from a resin containing cyclic olefins and polyethylenes, specifically cyclic olefin copolymers and linear low-density polyethylene, which enhances the bottle's operability by improving compressive strength and droplet control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional materials are used for the squeeze bottle, then manufacturing cost and ease of manufacture are maintained, but operability for dripping or pouring is insufficient
Solution Approach 1:
The patent applies parameter changes by modifying the material composition parameters - specifically using a resin containing cyclic olefins (5-50 mass%) and polyethylene (50-95 mass%). This compositional parameter change improves the bottle's operability for dripping and pouring while maintaining manufacturability through conventional molding processes.
Solution Approach 2:
The patent employs composite materials by combining cyclic olefin polymers and polyethylene in specific ratios. This composite resin formulation achieves the desired balance of properties including operability, strength, and manufacturability that neither material could achieve alone.
2Device complexity
If the squeeze bottle is made from integrally formed structure, then device complexity is reduced, but control of droplet or pour amount becomes unstable
Solution Approach 1:
The patent resolves this contradiction through parameter changes in material composition - using cyclic olefins (5-50 mass%) and polyethylene (50-95 mass%). This specific compositional ratio provides the right balance of flexibility and structural integrity, enabling stable droplet control from an integrally formed simple structure without requiring complex internal mechanisms.
Solution Approach 2:
The patent applies local quality by having different resin compositions in different regions - the inner layer containing cyclic olefins (5-50 mass%) provides local flexibility for droplet formation, while the outer layer with polyethylene (50-95 mass%) provides structural support. This regional differentiation enables stable dispensing from a simple integral structure.
Data Source
Figure 1(a)~1(b)
Figure 2
Figure 3
AI summary
The present invention relates to a squeeze bottle integrally including a container body including a housing portion for housing a liquid composition and a spout connected to the housing portion; and a lid joined to the container body so as to seal an opening of the spout, in which the container body contains a resin containing cyclic olefins and polyethylenes.