Polyamide Film Texturing for Accurate Surface Transfer
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Solution Overview
Problem
Existing methods for texturing plastic materials fail to accurately reproduce complex surface finishes of non-metallic materials like fabrics, leather, and wood, and often result in materials that are either too rigid or excessively adhere to the texturing surface, making it difficult to detach the plastic from the texturing wall.
Innovation Solution
A method involving a mold set to a temperature below 120°C, application of a texturing element with a structured surface, and a semi-crystalline polyamide film, followed by controlled heating and pressure to transfer the texture onto the film, ensuring the film detaches easily from the texturing element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If plastic materials are used to imitate traditional materials like leather or wood, then cost is reduced, but the ability to accurately reproduce complex surface finishes deteriorates
Solution Approach 1:
The patent applies parameter changes by controlling the mold temperature to be less than or equal to 120°C (preferably between 20°C and 90°C) during the injection molding process. This temperature parameter control allows the polyamide material to accurately reproduce complex surface textures of non-metallic materials like fabric, leather, paper, and wood while maintaining cost-effectiveness compared to using actual traditional materials.
2Strength
If the plastic material is made rigid to maintain structural integrity, then strength is improved, but the ability to take on the relief of the texturing surface deteriorates
Solution Approach 1:
The patent uses parameter changes by controlling the mold temperature to be less than or equal to 120°C, which optimizes the balance between material rigidity and texture reproduction capability. This temperature control allows the polyamide to sufficiently soften to take on the relief of the texturing surface while maintaining structural integrity upon cooling.
3Ease of manufacture
If the plastic material is heated to a liquid state to improve flow and filling, then manufacturability is improved, but adhesion to the texturing wall becomes excessive making detachment difficult
Solution Approach 1:
The patent applies parameter changes by precisely controlling the mold temperature to be less than or equal to 120°C. This temperature control prevents excessive adhesion between the polyamide material and the texturing wall while still allowing sufficient flow and filling during injection molding, enabling easy detachment after cooling.
4Device complexity
If existing texturing methods are used with metal mold walls, then manufacturing simplicity is maintained, but the ability to reproduce very complex surface finishes of non-metallic materials deteriorates
Solution Approach 1:
The patent uses parameter changes by controlling the mold temperature to be less than or equal to 120°C, which enables the reproduction of very complex surface finishes of non-metallic materials like fabric, leather, paper, and wood using standard metal mold walls, thus maintaining manufacturing simplicity while achieving high reproduction accuracy.
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 method effectively reproduces the texture of the texturing element on the semi-crystalline polyamide film, achieving a realistic visual and tactile finish without excessive bonding, allowing for the production of high-quality plastic materials that mimic the appearance and feel of materials like leather and wood.
Implementation Method 1
Applying at least one heating means (H) to said film of step (c), in order to arrive at a temperature (TT) on the side of the film facing the texturing agent (T), between Tg and the melting temperature (Tm) of the composition (CPO)
Implementation Method 2
applying a pressure means (P) to said film in order to bring it into contact with the texturing element (T), with a pressure between 1.5 and 2000 bars
Data Source
AI summary
A method for preparing an object including at least one film including at least one layer including a composition including at least one semi-crystalline polyamide having a melt enthalpy of between 25 J/g and 75 J/g, the film having on all or part of at least one of its surfaces the texture of a texturing element, wherein the method includes: a. providing a mold set to a temperature less than or equal to 120° C.; b. applying to the wall of the mold, at least one texturing element, and having at least partially a textured surface, the textured surface being on the face opposite that facing the mold; c. applying to the textured surface of the texturing element, at least one film comprising at least one layer, the thickness of the layer being at least 10 μm; d. applying heat and pressure to the film.