Cellulose Fiber Dispersion in Polyolefin Resin Composite
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Solution Overview
Problem
Current recycling methods for laminated paper with adhered polyolefin thin films face challenges in achieving uniform cellulose fiber dispersion and homogeneous resin composition, leading to reduced mechanical strength and increased energy consumption due to non-uniform sizes and water absorption issues.
Innovation Solution
A cellulose-fiber-dispersing polyolefin resin composite material is produced by mixing polyolefin laminated paper or polyolefin thin films with cellulose fibers with a polypropylene resin under specific conditions using a batch type closed kneading device, ensuring uniform dispersion and integration of cellulose fibers within the resin, while removing moisture to enhance mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If cellulose fiber is adhered to polyolefin thin film piece during separation treatment, then paper portion and polyolefin thin film portion can be separated, but uniform dispersion of cellulose fiber in resin cannot be achieved and homogeneous composition cannot be obtained
Solution Approach 1:
The patent applies parameter changes by controlling the molecular weight distribution of polyolefin resin (specifically Mz/Mw ratio) and adjusting processing conditions during kneading. By selecting polyolefin resin with appropriate molecular weight characteristics and controlling kneading parameters, the patent achieves uniform dispersion of cellulose fibers while maintaining homogeneous resin composition, resolving the contradiction between fiber dispersion uniformity and compositional homogeneity.
Solution Approach 2:
The patent creates a composite material system combining polyolefin resin with specific molecular weight distribution and cellulose fibers. This composite approach allows the polyolefin resin matrix to provide homogeneity while the dispersed cellulose fibers enhance mechanical properties, achieving both uniform dispersion and homogeneous composition simultaneously.
2Ease of manufacture
If polyolefin thin film piece with adhered paper components is used as raw material, then recycling process can be simplified, but sufficient drying treatment is required and large quantity of energy is consumed
Solution Approach 1:
The patent applies preliminary action by performing kneading treatment under controlled moisture conditions before final forming. By conducting the kneading process with appropriate moisture content control, the patent reduces the need for extensive subsequent drying treatment, thereby simplifying the overall recycling process and reducing energy consumption while maintaining material quality.
3Ease of manufacture
If non-uniform size and shape raw materials are used, then recycling process can be simpler, but difficult to obtain resin with homogeneous composition and physical properties
Solution Approach 1:
The patent uses parameter changes by controlling the molecular weight distribution (Mz/Mw ratio) of the polyolefin resin to compensate for variations in raw material size and shape. By adjusting this critical parameter, the patent ensures that even with non-uniform raw materials, the final resin composition achieves the required homogeneity and consistent physical 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 composite material exhibits excellent flowability, moldability, and mechanical strength, including tensile strength and impact resistance, making it suitable for injection molding and reducing energy consumption through efficient water removal during processing.
Implementation Method 1
mixing polyolefin laminated paper or polyolefin thin films with cellulose fibers with a polypropylene resin under specific conditions using a batch type closed kneading device
Implementation Method 2
removing moisture to enhance mechanical properties
Data Source
AI summary
A cellulose-fiber-dispersing polyolefin resin composite material, containing a polyolefin resin containing a polypropylene resin, and a cellulose fiber dispersed in the polyolefin resin, in which a proportion of the cellulose fiber is 1 mass part or more and 70 mass parts or less in a total content of 100 mass parts of the polyolefin resin and the cellulose fiber, and the polyolefin resin satisfies the expression: Mz/Mw≥4, which is a ratio of Z-average molecular weight Mz to weight-average molecular weight Mw to be obtained by a gel permeation chromatography measurement;a pellet or a formed body using this composite material; anda production method for the composite material.