Polymer-bentonite composite panel

Abstract

This invention relates to a polymer bentonite composite board, which comprises a board body and a surface activation layer. The board body includes a polymer matrix, a plurality of moisture-regulating mineral particles, a surface material layer, and a plurality of micro-gaps. The moisture-regulating mineral particles are dispersed and embedded in the polymer matrix, and are preferably bentonite particles with montmorillonite as the main component. The micro-gaps are formed and connected between and around the moisture-regulating mineral particles, and extend to at least one surface of the board body to form a plurality of openings. The surface activation layer is formed on at least one surface of the board body and has a plurality of micropores. The micropores and the openings of the micro-gaps are interconnected, allowing moisture and gases from the external environment to easily penetrate into the interior of the board and exchange with the moisture-regulating mineral particles. This endows the polymer bentonite composite board with multiple functions such as water absorption, moisture regulation, and antibacterial properties, and can further adsorb a slow-release component of essential oil to provide an auxiliary effect of slow-release fragrance.

Claims

1. A polymer bentonite composite board, comprising a board body and a surface activation layer, wherein the board body comprises a polymer matrix, a plurality of moisture-regulating mineral particles, a surface material layer, and a plurality of micro-gap structures, the moisture-regulating mineral particles being dispersedly embedded in the polymer matrix, the micro-gap structures being formed and communicating between and around the moisture-regulating mineral particles, and extending to at least one surface of the board body to form a plurality of openings, the surface activation layer being formed on at least one surface of the board body and having a plurality of micropores, the micropores communicating with the openings of the micro-gap structures to allow moisture and gas from the external environment to exchange moisture and gas with the moisture-regulating mineral particles through the micropores and the micro-gap structures.

2. The polymeric bentonite composite board as described in claim 1, wherein the filling moisture-regulating mineral particles are bentonite particles, and the bentonite particles contain montmorillonite to provide water absorption and swelling properties, cation exchange capacity and antibacterial properties.

3. The polymer bentonite composite board as described in claim 1, wherein the surface material layer is disposed on at least one outer surface of the board body, and together with the polymer matrix and the filling moisture-regulating mineral particles, constitutes the overall structure of the board body, and provides the board body with a predetermined mechanical strength.

4. The polymer bentonite composite board as claimed in claim 1, wherein the micro-gap is formed at the interface between the polymer matrix and the moisture-regulating mineral particles and between adjacent moisture-regulating mineral particles, and the micro-gap is interconnected to form a network, allowing moisture and gas to circulate inside the board body and extend to the surface of the board body to form the openings.

5. The polymer bentonite composite board as described in claim 1, wherein the surface activation layer is formed by removing the dense polymer thin layer on the surface of the board body through mechanical grinding or polishing, thereby exposing the moisture-regulating mineral particles on the surface of the board body and opening the openings in the micro-gap to promote the exchange of moisture and gas.

6. The polymer bentonite composite board as claimed in claim 1, wherein the board body further comprises a plurality of soluble additives dispersed in the polymer matrix, and the surface activation layer is formed by the soluble additives dissolving from the surface of the board body to form micropores and interconnected fine gaps on the surface of the board body, and further exposes the moisture-regulating mineral particles located on the surface.

7. The polymer bentonite composite board as described in claim 1, wherein the surface of the surface activation layer has a textured structure, the textured structure being formed by hot pressing an embossing mold onto the surface of the board body, and the textured structure forming a plurality of micro-openings between the protrusions to open the micro-gap and improve the air permeability and moisture exchange efficiency of the board.

8. The polymer bentonite composite board as claimed in claim 1, wherein the surface activation layer is formed by hot pressing a microneedle mold onto the surface of the board body, the microneedle mold having a plurality of microneedles, and the microneedle mold forming a plurality of through micropores on the surface of the board body after hot pressing, the through micropores being connected to the fine gaps inside the board body to increase the channels for moisture and gas exchange.

9. The polymer bentonite composite board as described in claim 1 further comprises an essential oil slow-release component, which is composed of natural essential oils, plant extracts or fragrance components, and the essential oil slow-release component is adsorbed in the micropores and micro gaps of the surface activation layer to slowly release fragrance or volatile active ingredients during use.

10. The polymeric bentonite composite board as claimed in claim 2, wherein the polymeric matrix is ​​made of polymethyl methacrylate, the filling moisture-regulating mineral particles include sodium-based bentonite and paper-grade bentonite, and based on 100 parts by weight of the polymeric bentonite composite board, the content of sodium-based bentonite is 15 to 30 parts by weight, the content of paper-grade bentonite is 5 to 9.5 parts by weight, and the sum of the content of sodium-based bentonite and the content of paper-grade bentonite does not exceed 39.5 parts by weight.

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