Polymer Pre-laid Waterproof Rolling Material Adhesive Bonding
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Solution Overview
Problem
Existing pre-laid waterproof rolling materials face issues with weak bonding between the adhesive and sand anti-sticking layers, leading to unsatisfactory adhesion with concrete and shedding of sand particles during construction, affecting construction progress and quality.
Innovation Solution
A polymer pre-laid waterproof rolling material comprising a polymer base material layer, a pressure-sensitive adhesive layer with a specific composition including styrene-isoprene-styrene block copolymer, C5 petroleum resin, naphthenic oil, and modified rosin resin, and a sand anti-sticking layer made from modified mullite, with a lapping layer and release film layer for improved adhesion and ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional adhesive layer is used with sand particles, then the structure is simple, but the bonding strength between adhesive layer and sand anti-sticking layer is insufficient
Solution Approach 1:
The adhesive layer uses a composite formulation combining styrene-isoprene-styrene block copolymer (25-35 parts), C5 petroleum resin (32-38 parts), and 145 pentaerythritol modified rosin resin (5-12 parts). This composite material approach resolves the bonding strength issue by leveraging the complementary properties of each component: the block copolymer provides adhesive strength, the C5 petroleum resin enhances flexibility and low-temperature performance, and the modified rosin resin improves bonding to sand particles. The specific composition ratios optimize the balance between various performance requirements.
Solution Approach 2:
The patent specifies precise parameter ranges for the adhesive layer components, including the melting index of styrene-isoprene-styrene block copolymer (10-15 g/10 min at 200°C), the softening point of C5 petroleum resin (95-105°C), and the kinematic viscosity of naphthenic oil (9-11 mm² at 100°C). By controlling these parameters within defined ranges, the adhesive layer achieves optimal bonding strength while maintaining flexibility and processability, resolving the contradiction between strength and complexity through standardized parameter control.
2Strength
If the viscosity of the adhesive layer is increased to improve bonding, then the bonding effect improves, but the sand anti-sticking layer particles shed off easily during rolling up
Solution Approach 1:
The patent optimizes the viscosity parameter of the adhesive layer by selecting specific components and their ratios. The C5 petroleum resin (32-38 parts) and naphthenic oil (25-32 parts) work together to achieve an optimal viscosity that provides sufficient bonding strength while preventing excessive adhesion that would cause sand particle shedding. The controlled viscosity ensures the adhesive layer maintains proper flow characteristics during application and bonding without creating a sticky surface that sheds particles during rolling operations.
Solution Approach 2:
The composite adhesive layer formulation balances bonding capability with particle retention. The styrene-isoprene-styrene block copolymer provides the base adhesive properties, while the C5 petroleum resin and modified rosin resin modify the rheological characteristics. This composite approach enables the adhesive layer to maintain appropriate viscosity for strong bonding while avoiding the excessive stickiness that causes sand particle shedding during the rolling up process.
3Strength
If the adhesive layer thickness is increased to improve bonding strength, then the adhesion to concrete improves, but the flexibility and ease of operation deteriorate
Solution Approach 1:
The patent specifies an optimal thickness range for the adhesive layer (0.25-0.6 mm, preferably 0.3-0.4 mm) that balances bonding strength and flexibility. Within this controlled thickness parameter, the adhesive layer provides sufficient adhesion to concrete while maintaining the flexibility needed for easy handling and installation. The parameter control ensures that increasing thickness beyond this range would compromise flexibility, while decreasing it would reduce bonding strength.
Solution Approach 2:
The adhesive layer formulation is designed to provide different functional characteristics at different locations within the layer thickness. The component distribution and molecular structure create zones with varying adhesive properties, allowing the thinner effective bonding zone to achieve strong adhesion to concrete while the overall layer maintains flexibility. This local quality approach enables optimal performance without requiring excessive overall thickness.
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 enhances the adhesive strength between the rolling material and concrete, prevents sand shedding, and ensures stable adhesion across various temperatures, improving construction efficiency and quality by maintaining high peeling strength and flexibility.
Implementation Method 1
a pressure-sensitive adhesive layer on the polymer base material layer
Implementation Method 2
25-35 parts by mass of a styrene-isoprene-styrene block copolymer
Implementation Method 3
32-38 parts by mass of a C5 petroleum resin; 25-32 parts by mass of a naphthenic oil
Implementation Method 4
a sand anti-sticking layer on the pressure-sensitive adhesive layer; the sand anti-sticking layer is selected from a modified mullite
Implementation Method 5
a lapping layer and a release film layer on the lapping layer
Data Source
AI summary
A polymer pre-laid waterproof rolling material, including a polymer base material layer, a pressure-sensitive adhesive layer on the polymer base material layer, and a sand anti-sticking layer on the pressure-sensitive adhesive layer; the pressure-sensitive adhesive layer includes: 25-35 parts by mass of a styrene-isoprene-styrene block copolymer; 32-38 parts by mass of a C5 petroleum resin; 5-12 parts by mass of a 145 pentaerythritol modified rosin resin; 25-32 parts by mass of a naphthenic oil; 0.3 parts by mass of an antioxidant; and 0.5 parts by mass of a UV light stabilizer; the C5 petroleum resin has a softening point of 95-105° C. and a color number of less than 4; the naphthenic oil has a kinematic viscosity of 9-11 mm2 at 100° C. and a density of 0.8950 g/cm3-0.9100 g/cm3 at 20° C. The pressure-sensitive adhesive layer has a stronger bonding effect with sintered sand and further improves the bonding effect with concrete.