Multimodal Polyethylene Drip Irrigation Pipe Emitter Adherence
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Solution Overview
Problem
Current polymer compositions for drip irrigation pipes do not fully meet the requirements for in-line production, particularly in terms of water discharge performance and adherence of emitters to the pipe wall, leading to inconsistent irrigation control and production challenges.
Innovation Solution
A drip irrigation pipe made from a polymer composition comprising a multimodal polyethylene base resin with specific molecular weight distribution and carbon black content, which provides improved water discharge performance and processing behavior, enabling precise emitter adherence and efficient production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional polymer compositions are used for in-line production, then production can proceed with standard materials, but emitter adherence to pipe wall is insufficient and water discharge performance is inconsistent
Solution Approach 1:
The patent applies parameter changes by modifying the polymer composition parameters - specifically using a multimodal polyethylene base resin with controlled molecular weight distribution (Mw/Mn ≤ 11.0) and adding carbon black (1-10 wt%). These parameter changes improve emitter adherence and water discharge consistency while maintaining industrial production feasibility.
Solution Approach 2:
The patent uses composite materials by combining multimodal polyethylene base resin with carbon black additive. This composite composition provides both sufficient emitter adherence during in-line production and consistent water discharge performance, resolving the contradiction between reliability and ease of manufacture.
2Manufacturing precision
If polymer composition allows good emitter adherence, then water discharge control improves, but production rate and industrial feasibility may be compromised
Solution Approach 1:
The patent optimizes polymer composition parameters - using multimodal polyethylene with specific molecular weight distribution (Mw/Mn ≤ 11.0) and carbon black content (1-10 wt%). This enables precise water discharge control through consistent emitter positioning while maintaining high production rates suitable for industrial manufacturing.
3Loss of substance
If thin-walled pipe structure is used, then material consumption decreases, but kinking resistance and water flow continuity are reduced
Solution Approach 1:
The patent changes the material parameters by using multimodal polyethylene with controlled molecular weight distribution and adding carbon black. This enhances the mechanical properties of thin-walled pipes, improving kinking resistance and ensuring water flow continuity while maintaining low material consumption.
4Reliability
If multimodal polyethylene with narrow molecular weight distribution is used, then water discharge performance improves, but processing complexity increases
Solution Approach 1:
The patent manages polymer composition complexity by using multimodal polyethylene with controlled molecular weight distribution (Mw/Mn ≤ 11.0) combined with carbon black additive. This approach achieves consistent water discharge performance while keeping the composition relatively simple and compatible with existing extrusion equipment.
Data Source
AI summary
Drip irrigation pipe provided with perforations in the pipe wall for discharging water, which perforations are arranged at intervals along the length of the pipe, wherein the pipe comprises a polymer composition as defined in claims, a process for producing said pipe, pellets of said polymer composition and the use of said polymer composition for producing a drip irrigation pipe.