Peroxide-Modified PHA Resin Film for Strength and Blocking Resistance
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Solution Overview
Problem
Existing resin films made from poly(3-hydroxyalkanoate) resins face challenges in achieving both high productivity and sufficient strength, as well as low blocking resistance, making them unsuitable for applications like bags and gloves.
Innovation Solution
A resin film composed of a reaction product of two poly(3-hydroxybutyrate) resins with varying monomer contents, modified with an organic peroxide, achieving a specific ratio and molecular weight distribution, and optionally including additional components like plasticizers and fillers, to enhance mechanical properties and blocking resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the proportion of 3-hydroxyhexanoate units is increased to improve mechanical properties, then the mechanical properties of the molded article are improved, but the molded article productivity is reduced
Solution Approach 1:
The invention changes the compositional parameters by using a copolymer with a specific 3-hydroxyhexanoate unit content range (1-6 mol%) rather than high proportions, and introduces an organic peroxide (0.01-0.5 parts by weight per 100 parts resin) to modify the resin. This parameter optimization achieves sufficient mechanical properties without sacrificing productivity.
Solution Approach 2:
The invention creates a composite system by combining poly(3-hydroxyalkanoate) resin with organic peroxide modifiers. This composite approach allows the resin to achieve both good mechanical properties and high productivity through the synergistic effect of the resin base and peroxide modification, rather than relying solely on high 3-hydroxyhexanoate content.
2Strength
If the proportion of 3-hydroxyhexanoate units is increased to improve mechanical properties, then the mechanical properties of the molded article are improved, but the blocking resistance is reduced
Solution Approach 1:
The invention optimizes the 3-hydroxyhexanoate unit content to a moderate range (1-6 mol%) rather than high proportions, and uses organic peroxide modification to achieve the desired mechanical properties. This parameter control maintains appropriate blocking resistance while providing sufficient strength.
Solution Approach 2:
The organic peroxide acts as an intermediary modifier that enables the resin to achieve good mechanical properties without requiring high 3-hydroxyhexanoate content. This intermediary substance allows the base resin to maintain its natural blocking resistance characteristics while still providing enhanced mechanical performance.
3Productivity
If a polyester resin composition is used to increase productivity, then the molded article productivity is improved, but the resin film strength is insufficient
Solution Approach 1:
The organic peroxide serves as a modifying intermediary that enhances the mechanical strength of the resin film while maintaining the high productivity characteristics of polyester resin compositions. The peroxide modification allows the resin to achieve both goals simultaneously.
Solution Approach 2:
The invention uses a specific composition formulation with controlled 3-hydroxyhexanoate content (1-6 mol%) and organic peroxide addition (0.01-0.5 parts by weight per 100 parts resin) to achieve both high productivity and sufficient film strength, optimizing the parameter balance between these two properties.
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 resulting resin film exhibits good mechanical properties, high blocking resistance, and is producible with high productivity, suitable for use in bags, gloves, and banding materials.
Implementation Method 1
a reaction product obtained by using two poly(3-hydroxybutyrate) resins differing in the contents of constituent monomers and modifying these resins with an organic peroxide
Data Source
AI summary
Provided is a resin film containing a reaction product of 100 parts by weight of a poly(3-hydroxyalkanoate) resin component and 0.01 to 0.5 parts by weight of an organic peroxide. The poly(3-hydroxyalkanoate) resin component includes: a copolymer (A) which is a copolymer of 3-hydroxybutyrate units and 3-hydroxyhexanoate units and in which a content of the 3-hydroxyhexanoate units is from 1 to 6 mol %; and a copolymer (B) which is a copolymer of 3-hydroxybutyrate units and 3-hydroxyhexanoate units and in which a content of the 3-hydroxyhexanoate units is 24 mol % or more.