PHA Resin Tube Composition for Faster Extrusion Solidification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The production of poly(3-hydroxyalkanoate) resin-containing tubes is hindered by low productivity due to slow solidification speed during extrusion molding.
Innovation Solution
A resin tube composition comprising specific proportions of poly(3-hydroxybutyrate) and poly(3-hydroxyalkanoate) copolymer, with poly(3-hydroxybutyrate) ranging from 7 to 13 wt%, enhances solidification speed and productivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If poly(3-hydroxyalkanoate) resin is used for tube production, then marine degradability and biodegradability are achieved, but solidification speed during extrusion molding becomes slow
Solution Approach 1:
The patent uses a composite material system consisting of poly(3-hydroxybutyrate) homopolymer and poly(3-hydroxyalkanoate) copolymer in specific proportions. This composite approach allows the combination of materials with different solidification characteristics, achieving both marine degradability and improved solidification speed for high-productivity tube production.
Solution Approach 2:
The patent optimizes the compositional parameters by controlling the ratio of poly(3-hydroxybutyrate) to poly(3-hydroxyalkanoate) copolymer within specific ranges. By adjusting these compositional parameters, the solidification speed is enhanced while maintaining the marine degradability property of the poly(3-hydroxyalkanoate) resin system.
2Reliability
If poly(3-hydroxyalkanoate) resin is used for tube production, then bio-based properties are achieved, but productivity remains low due to slow solidification
Solution Approach 1:
The patent employs a composite material system combining poly(3-hydroxybutyrate) homopolymer and poly(3-hydroxyalkanoate) copolymer. This composite structure maintains the bio-based property inherited from the poly(3-hydroxyalkanoate) copolymer while the poly(3-hydroxybutyrate) component contributes to faster solidification, thereby improving production speed.
Solution Approach 2:
The patent modifies the compositional parameters by optimizing the weight ratio between poly(3-hydroxybutyrate) and poly(3-hydroxyalkanoate) copolymer. This parameter optimization enables the resin composition to solidify faster during extrusion molding, increasing productivity while preserving the bio-based characteristic.
3Productivity
If high solidification speed is achieved, then productivity improves, but gel formation increases affecting appearance
Solution Approach 1:
The patent precisely controls the compositional parameters within specific ranges: poly(3-hydroxybutyrate) at 60-80 wt% and poly(3-hydroxyalkanoate) copolymer at 20-40 wt%. This optimized parameter range achieves high solidification speed for improved productivity while minimizing gel formation to maintain good appearance quality.
Solution Approach 2:
The patent applies local quality by having different polymer components serve different functions: poly(3-hydroxybutyrate) provides fast solidification, while poly(3-hydroxyalkanoate) copolymer controls gel formation. This functional differentiation within the composite allows simultaneous achievement of high productivity and good appearance.
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 resin tube is produced at high productivity with reduced gel formation, maintaining a good appearance and mechanical properties.
Implementation Method 1
the inventors have found that a resin tube having a good appearance can be produced at high productivity by using given proportions of poly(3-hydroxybutyrate) and a poly(3-hydroxyalkanoate) copolymer as poly(3-hydroxyalkanoate) resins
Data Source
AI summary
A resin tube contains poly(3-hydroxybutyrate) and a poly(3-hydroxyalkanoate) copolymer. The amount of the poly(3-hydroxybutyrate) is from 7 to 13 wt % based on 100 wt % of the total amount of the poly(3-hydroxybutyrate) and the copolymer. The copolymer may include a copolymer (A) which is a copolymer of 3-hydroxybutyrate units and other hydroxyalkanoate units and in which the proportion of the other hydroxyalkanoate units in the total amount of the 3-hydroxybutyrate units and the hydroxyalkanoate units is from 1 to 5 mol %.