Intermittent Coating Release Paper for Sanitary Packaging
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Solution Overview
Problem
Current release paper manufacturing processes are inefficient, leading to material wastage and high costs, particularly in packaging sanitary products, where silicone oil is fully coated but often unused, and the structure is complex, making it difficult to promote in environmentally backward areas.
Innovation Solution
A manufacturing process for intermittent coating release paper involves undercoating, precise printing of optical marks, intermittent coating of silicone oil and heat-sealing material, and secondary drying, allowing for 100% utilization of coating materials and a degradable structure, eliminating the need for additional release paper.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If release paper is fully coated with silicone oil, then the release function is ensured, but a large amount of release agent is wasted and heat-sealing cannot be performed
Solution Approach 1:
The patent divides the coating area into two distinct segments: a first coating area with silicone oil release agent and a second coating area without silicone oil. This segmentation allows the release function to be provided only where needed (first coating area) while enabling heat-sealing in the second area, thereby eliminating unnecessary silicone oil waste and solving the contradiction between ensuring release function and reducing substance loss.
Solution Approach 2:
The patent applies different coating qualities to different regions of the release paper. The first coating area receives silicone oil coating to provide release properties, while the second coating area remains uncoated or receives different coating to allow heat-sealing. This local differentiation of quality ensures that each area has the specific properties needed for its function, resolving the contradiction between uniform release protection and localized heat-sealing capability.
2Reliability
If additional release paper is used for packaging, then the adhesive surface protection is improved, but the packaging structure becomes complex and costs increase
Solution Approach 1:
The patent merges the release paper and packaging film into a single integrated structure. The release paper serves dual functions: protecting the adhesive surface during packaging and enabling heat-sealing for packaging. By combining these functions into one component rather than using separate release paper and packaging film layers, the packaging structure is simplified while maintaining adhesive surface protection, thereby resolving the contradiction between reliability and device complexity.
Solution Approach 2:
The release paper is designed with multi-functionality: it provides adhesive surface protection, enables heat-sealing, and serves as the packaging material itself. This universal design eliminates the need for additional separate packaging components, simplifying the overall packaging structure while ensuring adequate protection of the adhesive surface, thus resolving the contradiction between improved protection and reduced structural complexity.
3Reliability
If plastic packaging film is used, then the packaging effectiveness is improved, but environmental protection is compromised
Solution Approach 1:
The patent changes the material parameter of the packaging from conventional plastic film to release paper with specific coating characteristics. The release paper maintains packaging effectiveness through its coated areas while being environmentally friendly and degradable. This parameter change in material selection resolves the contradiction between packaging effectiveness and environmental protection by finding an alternative material that achieves both goals.
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 process results in a fully degradable, cost-effective release paper with improved packaging efficiency, enabling direct use in small packages with self-contained release and heat-sealing layers, reducing material waste and simplifying packaging structures.
Implementation Method 1
primary drying in a drying oven, drying the base material after the undercoating in a high-temperature drying oven
Implementation Method 2
printing optical marks, feeding the base material between symmetrical upper and lower printing rollers, printing the optical marks at equal intervals
Data Source
AI summary
Disclosed is a manufacturing process of intermittent coating release paper, which includes: a) undercoating; b) primary drying in a drying oven; c) printing optical marks; d) coating silicon in a section; e) accurately coating heat-sealing material on front and back sides of the base material; f) secondary drying, rolling up, the action of coating the silicon and coating the heat sealing material is precisely positioned by using the optical marks printed in the previous process. The manufactured release paper can be directly applied to the packaging of women's sanitary napkins, pads, and maternity napkins, there is no need to use spaced release paper, the whole can be degraded or recycled for pulping, and can also reduce the use of various coating materials during production, reduce production costs, thus being beneficial to improve the production level of the existing process and the ecological environment protection.