Neutralized Acid Copolymer Decorative Molded Articles
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Solution Overview
Problem
Existing methods for creating decorative effects in molded articles using neutralized acid copolymers face challenges in incorporating additional ingredients while maintaining efficient reproducibility and automatization of the molding process at a large scale.
Innovation Solution
The development of molded articles that include at least 75% by weight of a neutralized acid copolymer, combined with a polyamide-based pigment masterbatch and a liquid-based pigment masterbatch, which are dry blended and then molded using an injection molding apparatus to achieve desired decorative effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If additional ingredients such as pigments are added to create decorative visual effects, then the visual effect is improved, but the molding process becomes substantially more complex
Solution Approach 1:
The patent applies preliminary action by pre-mixing pigments with the neutralized acid copolymer in a masterbatch formulation before the actual molding process. This pre-preparation step incorporates the decorative ingredients into a ready-to-use form that can be directly processed in standard injection molding equipment, avoiding the need for complex multi-step processing and simplifying the overall manufacturing process while achieving the desired visual effects.
Solution Approach 2:
The patent utilizes parameter changes by carefully controlling the molecular weight and composition parameters of the neutralized acid copolymer to ensure compatibility with common pigments. By adjusting these material parameters, the formulation maintains processability in standard molding equipment while enabling the incorporation of pigment additives that create the desired decorative effects without substantially complicating the molding process.
2Ease of manufacture
If pigments are added to create decorative effects, then the visual effect is improved, but the reproducibility and automatization of the molding process deteriorates
Solution Approach 1:
The patent applies preliminary action by preparing masterbatches with pre-measured pigment concentrations that can be directly fed into injection molding equipment. This pre-preparation eliminates the need for complex real-time pigment dosing during molding, enabling standard automated molding processes to produce decorative articles with consistent visual effects and maintaining high production efficiency.
Solution Approach 2:
The patent ensures homogeneity by formulating the neutralized acid copolymer and pigment in a uniform masterbatch composition before molding. This homogeneous pre-mixed formulation ensures consistent pigment distribution throughout the molded article, achieving uniform visual effects that are easily reproduced across multiple production cycles using standard automated molding equipment.
3Ease of manufacture
If marble-type effects are created using pigmented polyamides in a copolymer blend, then the decorative effect is improved, but the visual effect is limited to streak-like patterns in an otherwise transparent matrix
Solution Approach 1:
The patent applies composite materials by combining the neutralized acid copolymer with pigmented polyamide masterbatches and other compatible additives in a formulated blend. This composite approach enables the creation of diverse decorative effects including marble-type patterns, metallic finishes, and opaque color variations, significantly enhancing the versatility of the molded articles beyond simple streak patterns while maintaining ease of manufacture through standardized processing.
Data Source
AI summary
Molded articles having a decorative effect include at least 75% by weight neutralized acid copolymer. The molded articles include from 0.1% to 5% by weight polyamide-based pigment masterbatch. The polyamide-based pigment masterbatch includes from 30% to 95% by weight polyamide and from 5% to 70% by weight of a first pigment associated with the polyamide. The molded articles further include from 0.1% to 5% by weight of a second pigment derived from a liquid-based pigment masterbatch; and from 0.1% to 0.7% by weight of oil-based carrier derived from the liquid-based pigment masterbatch. Methods for preparing the molded articles include dry blending a neutralized acid copolymer, a polyamide-based pigment masterbatch, and a liquid-based pigment masterbatch to form an initial mixture; feeding the initial mixture to an injection molding apparatus; and molding the initial mixture with the injection molding apparatus to form the molded article.