4-Methyl-1-Pentene Polymer Resin Composition for Mold Releasability
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Solution Overview
Problem
Current resin compositions face challenges with stickiness, transparency, and processing efficiency due to the use of additives like fatty acid amides and inorganic fine powders, which lead to issues such as discharge pulsation, malodor, and reduced transparency in thermoplastic elastomers.
Innovation Solution
A resin composition containing a 4-methyl-1-pentene polymer with specific intrinsic viscosity, molecular weight distribution, and terminal double bonds, which provides excellent mold releasability, compatibility, and transparency, and is produced using a metallocene catalyst to ensure uniformity and high molecular weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fatty acid amide is added to provide surface lubricity, then surface lubricity is improved, but discharge pulsation and malodor occur at high temperature
Solution Approach 1:
The patent changes the chemical composition parameters by replacing fatty acid amide with a specific polymer composition containing polyolefin resin and polyester resin in controlled ratios, fundamentally altering the lubricating mechanism while eliminating harmful effects at high temperature
Solution Approach 2:
The invention uses a composite material system combining polyolefin resin and polyester resin in specific proportions to achieve both surface lubricity and thermal stability, replacing the single-component fatty acid amide with a multi-component polymer system
2Ease of operation
If inorganic fine powder is added as anti-blocking agent, then anti-blocking effect is improved, but transparency deteriorates due to excessive bleeding
Solution Approach 1:
The patent changes the chemical nature of the anti-blocking agent from inorganic fine powder to an organic polymer composition, altering its bleeding characteristics and improving transparency while maintaining anti-blocking effectiveness
Solution Approach 2:
The invention replaces long-lasting inorganic anti-blocking agents with a polymer-based system that provides temporary but sufficient anti-blocking action without the persistence issues of inorganic powders, allowing for better transparency
3Strength
If thermoplastic elastomer is kneaded at high temperature to improve adhesion, then adhesion is improved, but molecular weight decreases due to resin decomposition
Solution Approach 1:
The patent changes the processing temperature parameters to a lower range that avoids resin decomposition while still achieving sufficient adhesion through the specific polymer composition, preventing molecular weight reduction
Solution Approach 2:
The invention converts the potential harm of low adhesion (requiring high temperature kneading) into a benefit by using a polymer composition that naturally provides adequate adhesion at lower temperatures, thereby protecting molecular weight from decomposition
4Stability of the object's composition
If thermoplastic elastomer is kneaded for plural times to improve mixing, then mixing is improved, but production efficiency decreases due to longer kneading time
Solution Approach 1:
The patent changes the compositional parameters of the polymer system to improve compatibility and mixing characteristics, allowing for better mixing in a single kneading operation rather than requiring multiple operations
Solution Approach 2:
The invention enables continuous mixing action in a single kneading cycle through optimized polymer composition, eliminating the need for interrupted multi-stage kneading and thereby improving production efficiency
Data Source
AI summary
[Object] To provide a resin composition with excellent mold releasability and blocking resistance.[Solution] A resin composition containing a 4-methyl-1-pentene polymer includes 0.01 to 10 parts by mass of a 4-methyl-1-pentene polymer (B) per 100 parts by mass of at least one resin (A) selected from the group consisting of thermoplastic resins and thermosetting resins, wherein the 4-methyl-1-pentene polymer (B) has (B1) an intrinsic viscosity [η] of 0.01 or more but less than 0.50 dl/g measured at 135° C. in a decalin solvent.