Solvent Wipe Flat Pack with Inner Bag to Protect Resealable Flap
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Solution Overview
Problem
Existing flat packs of solvent impregnated wipes with aggressive solvents for removing greases, oils, and tars have adhesives that deteriorate quickly, rendering the resealable flap ineffective within days, leading to a short shelf life.
Innovation Solution
A flat pack design featuring an inner bag protected by an outer bag with a peelable resealable adhesive flap, where the flap remains attached through cut shapes that connect to the outer bag, preventing solvent exposure and maintaining seal integrity, allowing for extended shelf life and convenient use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an aggressive solvent is used to remove greases, oils and tars, then the cleaning effectiveness is improved, but the adhesive on the resealable flap is attacked and destroyed within one or two days
Solution Approach 1:
The packaging is divided into an inner bag containing the wipes and an outer bag containing the inner bag. The inner bag is made of solvent-resistant material to protect the adhesive on the outer bag's resealable flap from the aggressive solvent, while still allowing the solvent to be effective when the wipes are in use.
Solution Approach 2:
The inner bag acts as an intermediary barrier between the aggressive solvent and the adhesive on the outer bag. This intermediate layer prevents direct contact between the solvent and adhesive, protecting the adhesive from degradation while allowing the solvent to perform its cleaning function.
2Ease of operation
If the adhesive flap is made peelable and resealable for convenience, then the ease of operation is improved, but the adhesive deteriorates quickly when exposed to aggressive solvent
Solution Approach 1:
The packaging system is segmented into inner and outer bags, isolating the adhesive-containing outer bag from the solvent-containing inner bag. This allows the outer bag to maintain its peelable and resealable functionality throughout the shelf life while the inner bag protects the adhesive from solvent exposure.
Solution Approach 2:
The inner bag is pre-positioned within the outer bag before use, creating a protective barrier in advance. This preliminary arrangement ensures that when the outer bag is sealed and stored, the adhesive is already protected from potential solvent exposure, extending the functional shelf life of the resealable flap.
3Ease of operation
If the inner bag is made accessible through a cut in the outer bag, then the ease of operation is improved, but the outer bag structure may compromise without proper connection
Solution Approach 1:
The outer bag has different structural qualities in different areas: the area around the cut opening is reinforced with connecting portions to maintain structural integrity, while other areas maintain their normal properties. This localized reinforcement allows easy access through the cut while preventing structural compromise.
Solution Approach 2:
The outer bag incorporates connecting portions that act as reinforced composite structures at the cut opening. These connecting portions provide enhanced strength and structural support at the critical opening area, allowing the bag to maintain its integrity while providing access to the inner bag.
Data Source
Figure 1~4
Figure 5~6
AI summary
A flat pack (2) of solvent impregnated wipes, which flat pack (2) comprises an inner bag (4) which contains the wipes, and an outer bag (6) which contains the inner bag (4), and the flat pack (2) being such that the wipes are impregnated with a solvent which is aggressive and which is for removing greases, oils and tars, the inner bag (4) is sealed to protect the outer bag (6) from the solvent, the outer bag (6) has a peelable resealable adhesive flap (8) which covers an opening (10) in the outer bag (6), and the inner bag (4) is accessible through the opening in the outer bag (6).