KR-102961366-B1 - Method for Manufacturing Eco-Friendly Synthetic Resin Building Material

Abstract

The present invention relates to a method for manufacturing an eco-friendly synthetic resin building material that achieves an appearance and texture similar to wood by imparting a wood grain shape to the synthetic resin through roller molding and a cooling and processing process, while possessing excellent recyclability as it allows for melting and reprocessing upon disposal rather than simple incineration or landfilling, unlike conventional wood materials, and further enhances the eco-friendliness of the synthetic resin by using a bio-based resin such as polylactide (PLA) as a base material, and by selectively adding inorganic fillers and biodegradable moisture barriers to improve water resistance and mechanical strength. The method comprises: a raw material mixing step (S100) of preparing a basic blend raw material by mixing surface-modified nano silica and a biodegradable moisture barrier with a polylactide (PLA)-based bio-resin to prevent performance degradation in high-humidity environments; a fusion and melting step (S200) of converting the mixed raw material into a homogeneous molten resin state by heating and shearing it under high-temperature melt extrusion process conditions; and a coloring and patterning step of injecting an eco-friendly pigment into the molten resin and simultaneously applying a roller-type pattern molding means to realize a wood pattern or a stone pattern. It comprises: a patterning step (S300); a molding and cooling step (S400) in which molten resin with a pattern is injected into a mold to form a predetermined building material shape and rapidly cooled through a cooling tank to ensure dimensional stability; and a reprocessing preservation step (S500) in which an eco-friendly surface coating layer is formed through a post-processing heat treatment that strengthens thermal stability and crystallinity so that the manufactured building material can be melted and remolded even when it is discarded after use.

Inventors

• 강민정

Assignees

• 주식회사 티앤비우드

Dates

Publication Date

20260511

Application Date

20250910

Claims (5)

1. A method for manufacturing a building material comprising: a raw material mixing step (S100) of preparing a basic blend of raw materials by mixing surface-modified nano silica and a biodegradable moisture barrier agent with a polylactide (PLA)-based bio-resin to prevent performance degradation in a high-humidity environment; a fusion and melting step (S200) of converting the mixed raw materials into a homogeneous molten resin state by heating and shearing them under high-temperature melt extrusion process conditions; a coloring and pattern imparting step (S300) of injecting an eco-friendly pigment into the molten resin and simultaneously applying a roller-type pattern molding means to realize a wood pattern or a stone pattern; a molding and cooling step (S400) of injecting the pattern-imparted molten resin into a mold to mold it into a predetermined building material shape and ensuring dimensional stability by rapidly cooling it through a cooling water bath; and a reprocessing preservation step (S500) of forming an eco-friendly surface coating layer through a post-processing heat treatment that strengthens thermal stability and crystallinity so that the manufactured building material can be melted and remolded even when it is discarded after use. The above raw material mixing step (S100) includes inducing the suppression of water absorption rate and improvement of mechanical strength of the PLA resin through a reinforcing agent containing hydroxyapatite fine powder, and The above-mentioned molding and cooling step (S400) is characterized by sequentially proceeding with a process of injecting material into a mold to form it, a process of securing dimensional stability of the molded body through rapid cooling, a process of controlling viscoelastic properties through reheating, a process of drawing out and cutting the molded body, and a process of applying an additional melt-recooling cycle to the surface of the molded body to enhance reprocessability so that the original physical properties and performance are maintained even after remelting.
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3. In paragraph 1, A method for manufacturing an eco-friendly synthetic resin building material, characterized in that the surface coating layer of the above-mentioned reprocessing preservation step (S500) includes a bio-coating agent based on a polysaccharide derived from seaweed to inhibit the decomposition of the PLA resin by ultraviolet rays and moisture.
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5. In paragraph 1, The above raw material mixing step (S100) is, A basic raw material mixing step (S110) of mixing surface-modified nano silica and a biodegradable moisture barrier into a polylactide (PLA)-based bio-resin; A reinforcing raw material mixing step (S120) for preparing a basic raw material composition by adding a lignin derivative or natural rubber latex to improve the cohesiveness and viscoelasticity between the basic raw materials; A method for manufacturing eco-friendly synthetic resin building materials characterized by being composed of

Description

Method for Manufacturing Eco-Friendly Synthetic Resin Building Material The present invention relates to a method for manufacturing eco-friendly building materials that can replace wood by melt-molding synthetic resin to realize a shape and pattern similar to wood. More specifically, the invention relates to a method for manufacturing eco-friendly synthetic resin building materials that achieves an appearance and texture similar to wood by imparting a wood grain shape to the synthetic resin through roller molding and a cooling and processing process, while also possessing excellent recyclability as it allows for melt-reprocessing upon disposal rather than simple incineration or landfilling, unlike conventional wood materials. Furthermore, to enhance the eco-friendliness of the synthetic resin, a bio-based resin such as polylactide (PLA) can be used as a base material, and water resistance and mechanical strength are improved by selectively adding inorganic fillers and biodegradable moisture barriers. In general, wood has been widely used as a construction material. Wood is easy to process and possesses aesthetic textures and patterns, making it highly versatile as an interior and exterior building material. However, wood has several limitations, as follows. First, wood is susceptible to moisture absorption, making it prone to deformation such as expansion, shrinkage, and warping during long-term use. In particular, in humid or outdoor environments, it causes decay and mold growth, which leads to a significant decrease in durability. Second, wood is vulnerable to fire, and due to its inconsistent structural strength, there is a significant variation in quality depending on the application. Therefore, when used as a structural material, additional processing or reinforcement is required to ensure stability. Third, wood is directly linked to the problem of resource depletion. As a natural resource, the logging process entails environmental destruction, and since most of it is disposed of through landfill or incineration, recycling is virtually impossible. In particular, incineration is a major cause of environmental pollution due to high carbon emissions. To address these issues, alternative building materials using synthetic resins have been researched. Synthetic resins possess consistent physical properties, excellent water and weather resistance, and the advantage of being moldable into desired shapes. In particular, thermoplastic resins can be repeatedly recycled through melt processing even after disposal, offering significant advantages over wood in terms of resource circulation and environmental aspects. Furthermore, in recent years, bio-based resins such as polylactide (PLA), inorganic fillers, and biodegradable moisture barriers have been researched to enhance the environmental performance of synthetic resins. This is making it possible to develop synthetic resin building materials with improved mechanical strength, water resistance, and eco-friendliness. However, conventional synthetic resin materials have difficulty replicating the unique patterns and textures of wood, resulting in low aesthetic satisfaction and difficulties in achieving natural harmony when applied to buildings. Therefore, there is a need to develop new building materials that are recyclable and highly durable, while providing aesthetic satisfaction by molding synthetic resins into an appearance similar to wood. FIG. 1 is a flowchart listing the manufacturing method of an eco-friendly synthetic resin building material constructed according to a preferred embodiment of the present invention in the order of processes. Hereinafter, the structure of the present invention and the resulting operation and effects will be described collectively with reference to the attached drawings. The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Furthermore, throughout the entire specification, the same reference numerals refer to the same components. The present invention relates to a method for manufacturing an eco-friendly building material that can replace wood by melt-molding a synthetic resin to realize a shape and pattern similar to wood. In particular, the present invention relates to a method for manufacturing an eco-friendly synthetic resin building material that achieves an appearance and texture similar to wood by imparting a wood grain shape to the synthetic resin through roller molding and a cooling and proce