Easy-Release Acrylic Block Copolymer Cleaner for Sebum Removal
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Solution Overview
Problem
Conventional sticky cleaners for removing organic dirt from surfaces, such as sebum and finger marks, are not convenient to use and often require frequent replacement or careful handling of detergents, and existing solutions do not effectively address the ease of use and effectiveness for touch-screen devices.
Innovation Solution
A sticky cleaner with a dirt-collecting member featuring a pressure-sensitive adhesive (PSA) based on an acrylic block copolymer with a hard and soft segment, incorporating a plasticizer and tackifier resin, which provides easy release and high dirt-collecting ability, and is designed for efficient use on portable devices like smartphones and tablets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a wipe made of paper, woven fabric or non-woven fabric is used to remove organic dirt, then the dirt can be removed from the surface, but the wipe gradually accumulates dirt with continuous use, requiring regular cleaning or replacement of wipes, which can be troublesome
Solution Approach 1:
The sticky cleaner is designed to be self-service by automatically collecting organic dirt on its surface through the PSA's adhesive properties. The dirt accumulates on the cleaner itself rather than requiring external cleaning intervention, enabling users to simply replace the cleaner when saturated rather than manually cleaning it
Solution Approach 2:
The sticky cleaner is designed as a disposable item that can be replaced when dirty. This eliminates the need for cleaning maintenance and ensures consistent cleaning performance throughout its service life, making it economically viable despite single-use design
2Reliability
If a suitable detergent is used with a sponge or gauze to remove organic dirt, then the dirt can be removed effectively, but careful handling of the detergent is necessary and some remaining detergent could alter the surface, requiring elimination of the detergent
Solution Approach 1:
The invention extracts the cleaning function from chemical detergents and concentrates it entirely in the PSA material. The PSA alone provides both the cleaning capability and the release mechanism, eliminating the need for separate detergent application and subsequent rinsing steps
Solution Approach 2:
The PSA acts as an intermediary between the surface and the dirt, using its unique adhesive properties to capture organic dirt through molecular interactions without requiring chemical detergents that could harm the surface
3Reliability
If conventional sticky cleaners are used to remove organic dirt, then some dirt removal capability is achieved, but they are not convenient to use and often require frequent replacement
Solution Approach 1:
The invention optimizes the PSA parameters by selecting specific acrylic block copolymers with controlled molecular weights and compositions, adjusting the soft segment content to achieve optimal balance between dirt-collecting ability and ease of release, thereby extending the cleaner's effective service life
Solution Approach 2:
The invention uses composite material structure combining hard segments (for structural integrity and release) and soft segments (for dirt adhesion), creating a PSA with synergistic properties that simultaneously achieves strong dirt collection and easy release capabilities
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 solution effectively removes organic dirt, including sebum and finger marks, from smooth surfaces with minimal force required, maintaining dirt-removing ability and reducing the need for frequent replacement, while being easy to apply and environmentally friendly.
Implementation Method 1
The PSA comprises, as its base polymer, an acrylic block copolymer having a hard segment (A) and a soft segment (B) in one molecule
Data Source
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AI summary
A sticky cleaner is provided for use in removing organic dirt stuck on a surface of an article. The sticky cleaner comprises a dirt-collecting member that collects the organic dirt as it makes contact with the surface of the article. The dirt-collecting member comprises a PSA at a part where it makes contact with the surface of the article. The PSA comprises, as its base polymer, an acrylic block copolymer having a hard segment (A) and a soft segment (B) in one molecule.