Polymer Pipe Outer Layer Composition for Bonding to Mineral Masses
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Solution Overview
Problem
Pipes made of polymer materials have a smooth, hydrophobic surface that fails to adhere well to hardening mineral masses, leading to gaps, reduced heat transfer, compromised tightness, and accelerated corrosion of reinforcement points, especially when embedded in concrete, cement, or similar materials.
Innovation Solution
A polymer composition with 5-45 parts by weight of polymer particles, having an average diameter of 10-250 μm, is used to create a textured outer layer that enhances bonding with mineral masses, preventing gaps and improving heat transfer and structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a smooth polymer surface is used for pipes, then ease of manufacture and basic flow properties are improved, but adhesion to hardening mineral masses deteriorates
Solution Approach 1:
The patent applies local quality by creating a surface layer with different properties than the bulk material. The outer surface contains polymer particles that protrude to create roughness and improve adhesion, while the inner bulk remains smooth polymer for ease of manufacture. This is achieved by adding 5-45 parts per hundred polymer of polymer particles with specific size distribution (average diameter 10-250 μm) to the extrusion composition, allowing the particles to migrate to the surface during processing.
2Reliability
If polymer particles are added to improve adhesion, then bonding to mineral masses is improved, but structural integrity may deteriorate
Solution Approach 1:
The patent applies parameter changes by carefully controlling the concentration and size distribution of polymer particles. The amount is limited to 5-45 parts per hundred polymer, and the average particle diameter is controlled at 10-250 μm. These parameter optimizations ensure sufficient surface protrusion for adhesion while preventing excessive particle concentration that would compromise the structural integrity of the pipe wall.
3Temperature
If polymer particles are used to create textured surface, then heat transfer is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies composite materials by creating a heterogeneous extrusion composition that combines base polymer with dispersed polymer particles. This composite approach allows the polymer particles to naturally migrate to the surface during extrusion, forming the textured structure needed for heat transfer without requiring additional manufacturing steps or complex equipment. The composition includes 5-45 parts per hundred polymer of particles with average diameter 10-250 μm, which simplifies processing while achieving the desired thermal performance.
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 textured surface ensures a strong, gap-free connection to mineral masses, enhancing heat transfer, reducing moisture ingress, and increasing pull-out forces, while maintaining structural integrity and preventing corrosion, thus improving the efficiency and reliability of geothermal systems and other applications.
Implementation Method 1
an improved connection to mineral hardening masses is obtained if the polymer composition used to produce the pipes or pipe fittings, in addition to the polymer, also comprises polymer particles
Implementation Method 2
the polymer particles on the surface of the wall of the pipe or molded pipe part are arranged in such a way that they rise above the surface to the outside
Implementation Method 3
the transfer of heat from the fluid conveyed in the pipe to the mineral mass or from the mineral mass to the fluid flowing in the pipe is significantly impeded
Data Source
Figure 1
AI summary
Use of a polymer composition comprising 55-95 pts. wt. of a polymer, 5-45 pts. wt. of polymer particles having an average particle diameter of 10-250 mu m, and optionally additives for producing at least one outer layer of a wall of pipes or pipe fittings, is claimed.