阅读说明：本技术 一种负离子粉基纸面石膏板及其制备方法 (Anion powder-based paper-faced gypsum board and preparation method thereof ) 是由 沈娟霞 刘元强 曹建平 叶交友 冯辰旭 史琦超 翁耀列 沈咏梅 沈锡春 孙建英 于 2019-11-20 设计创作，主要内容包括：本发明公开了一种负离子粉基纸面石膏板,包括：第一护面纸；第二护面纸；及石膏芯体,位于第一护面纸与第二护面纸之间且与第一护面纸和第二护面纸粘贴成一体；第一护面纸和/或第二护面纸的外表面涂覆或内部填充有负离子粉。本发明还公开了一种负离子粉基纸面石膏板的制备方法。本发明提供的负离子粉基纸面石膏板的第一护面纸和/或第二护面纸的外表面涂覆有或内部填充有负离子粉,缩短了室内空气渗入到负离子粉处的路径,使得室内空气更容易与负离子粉相互作用产生负氧离子,具有更好的净化室内空气的效果。(The invention discloses an anion powder-based paper-faced gypsum board, which comprises: a first cover paper; a second cover paper; the gypsum core body is positioned between the first protective paper and the second protective paper and is integrally adhered with the first protective paper and the second protective paper; the outer surface of the first protective paper and/or the second protective paper is coated or filled with negative ion powder. The invention also discloses a preparation method of the anion powder-based paper-surface gypsum board. According to the anion powder-based paper-faced gypsum board, the outer surfaces of the first facing paper and/or the second facing paper are coated or the interior of the first facing paper and/or the second facing paper is filled with anion powder, so that the path of indoor air permeating into the anion powder is shortened, the indoor air is easier to interact with the anion powder to generate negative oxygen ions, and the anion powder-based paper-faced gypsum board has a better indoor air purification effect.)

1. An anion powder-based paper-faced gypsum board, comprising:

a first cover paper;

a second cover paper; and

the gypsum board core is positioned between the first protective paper and the second protective paper and is integrally adhered with the first protective paper and the second protective paper;

and the outer surface of the first protective paper and/or the second protective paper is coated or filled with negative ion powder.

2. The negative ion powder-based paper gypsum board according to claim 1, wherein the mass ratio of the negative ion powder effective component to the first protective paper or the second protective paper is 5-15 g/m2, and the negative ion powder comprises the following components: tourmaline powder, rare earth oxide and rare earth salt, wherein the mass ratio of the tourmaline powder to the rare earth oxide to the rare earth salt is (4-5): (4-5): (0-1), the negative ion powder has a mesh number of 800-3000, and the count number of GM in the avalanche region is 15000-50000 ions/cc.

3. The anion powder-based paper-faced gypsum board of claim 1, wherein said gypsum board core comprises the following ingredients: gypsum slurry, fiber reinforced material, foaming agent, binder and auxiliary agent.

4. The anion powder-based paper-faced gypsum board of claim 3, wherein said fibrous reinforcing material is glass fibers.

5. The anion powder-based paper-faced gypsum board of claim 3, wherein the binder has a starch content of 70%, a moisture content of 11% to 13%, a pH of 6.5 to 7.5, a protein content of 0.2% or less, and a solubility in water of 73% to 78% at 20 to 40 ℃.

6. The negative ion powder-based paper-faced gypsum board of claim 3, wherein the auxiliary agent is at least one of a set accelerator, a water reducing agent, a dispersant, and a toughening agent.

7. The preparation method of the anion powder-based paper-faced gypsum board is characterized by comprising the following steps of:

preparing high-dispersion water-soluble negative ion liquid;

and preparing a paper-faced gypsum board with the outer surface of the first protective paper and/or the second protective paper coated or filled with the negative ion liquid.

8. The method of claim 7, wherein the step of preparing the paper-faced gypsum board coated with the negative ion liquid on the outer surface of the first and/or second cover paper comprises the steps of:

uniformly mixing the negative ion liquid and water in proportion to obtain a first mixed solution;

uniformly spraying the first mixed solution on the outer surface of common mask paper to obtain the first mask paper and/or the second mask paper;

uniformly mixing all components of the gypsum board core in proportion to form first mixed slurry;

pouring the first mixed slurry between the first facing paper and the second facing paper to form a slab;

drying the mat.

9. The method of claim 7, wherein the step of preparing the paper-faced gypsum board coated with the negative ion liquid on the outer surface of the first and/or second cover paper comprises the steps of:

uniformly mixing the negative ion liquid and water in proportion to obtain a second mixed solution;

uniformly mixing all the components of the gypsum board core in proportion to form second mixed slurry;

pouring the second mixed slurry between two common facing paper to form a plate blank;

drying the slab;

and uniformly spraying the second mixed solution on the outer surface of at least one of the two common protective paper of the dried plate blank to prepare the paper-surface gypsum board with the outer surface of the first protective paper and/or the second protective paper coated with the negative ion liquid.

10. The method of claim 7, wherein the step of preparing the paper-faced gypsum board filled with the negative ion liquid in the first and/or second cover paper comprises the steps of:

uniformly mixing the negative ion liquid and the paper pulp in proportion to obtain a third mixed solution;

preparing the third mixed solution into the first protective paper and/or the second protective paper;

uniformly mixing all the components of the gypsum board core in proportion to form third mixed slurry;

pouring the third mixed slurry between the first facing paper and the second facing paper to form a plate blank;

drying the mat.

Technical Field

The invention relates to the technical field of paper-surface plasterboards,

in particular, the invention relates to an anion powder-based paper-surface gypsum board and a preparation method thereof.

Background

With the development of civilization in modern society, the destruction of the environment is accelerated by the combustion of fossil fuels, particularly, in urban CBD or high-rise residential districts, the living and working places of people are dense, air conditioners and various household electrical appliances are intensively applied, and generated dust and a large amount of CO are generated₂Gas, which deteriorates the quality of indoor air.

The negative oxygen ion is an ion that is negatively charged by oxygen molecules acquiring extra electrons, and is generally formed by combining free electrons with oxygen molecules in the air. The discharge (lightning) phenomenon, photoelectric effect, fountain, waterfall, etc. in the nature can all ionize the surrounding air to form negative oxygen ions. The negative oxygen ions can eliminate irritant gases such as benzene, formaldehyde, ketone, ammonia and the like volatilized from indoor PM2.5 and various decorative materials, thereby achieving the purpose of cleaning air. The negative oxygen ions enjoy the names of vitamin oxygen, air vitamin, longevity element, air vitamin and the like in the medical field.

The gypsum board has the advantages of light weight, good strength-weight ratio, convenient processing, sound and heat insulation, fire prevention and the like, and is widely applied to inner partition walls, wall covering panels, ceilings, sound absorption board base materials, ground base materials and the like of various buildings such as houses, office buildings, shops, hotels, industrial plants and the like.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide an anion powder-based paper-surface gypsum board and a preparation method thereof.

In order to solve the problems, the invention adopts the following technical scheme:

an anion powder-based paper-faced gypsum board comprising:

a first cover paper;

a second cover paper; and

the gypsum board core is positioned between the first protective paper and the second protective paper and is integrally adhered with the first protective paper and the second protective paper;

and the outer surface of the first protective paper and/or the second protective paper is coated or filled with negative ion powder.

Preferably, the mass ratio of the active ingredients of the negative ion powder to the first protective paper or the second protective paper is 5-15 g/m 2.

Preferably, the anion powder comprises the following components: tourmaline powder, rare earth oxide and rare earth salt, wherein the mass ratio of the tourmaline powder to the rare earth oxide to the rare earth salt is (4-5): (4-5): (0 to 1). The negative ion powder has a mesh number of 800-3000, and the GM count in the avalanche region is 15000-50000 ions/cc.

Preferably, the gypsum board core comprises the following ingredients: gypsum slurry, fiber reinforced material, foaming agent, binder and auxiliary agent.

Preferably, the fibrous reinforcement is glass fibers.

Preferably, the starch content of the binder is more than 70%, the water content is 11% -13%, the pH value is 6.5-7.5, the protein content is less than or equal to 0.2%, and the solubility of the binder in water is 73% -78% at 20-40 ℃.

Preferably, the auxiliary agent is at least one of a coagulant, a water reducing agent, a dispersing agent and a toughening agent.

On the basis of the anion powder-based functional gypsum board technology, the invention provides a preparation method of an anion powder-based paper-surface gypsum board, which comprises the following steps:

preparing high-dispersion water-soluble negative ion liquid;

and preparing a paper-faced gypsum board with the outer surface of the first protective paper and/or the second protective paper coated or filled with the negative ion liquid.

Preferably, the preparation of the paper-faced gypsum board with the external surface of the first and/or second facing paper coated with the negative ion liquid comprises the following steps:

uniformly mixing the negative ion liquid and water in proportion to obtain a first mixed solution;

uniformly spraying the first mixed solution on the outer surface of common mask paper to obtain the first mask paper and/or the second mask paper;

uniformly mixing all components of the gypsum board core in proportion to form first mixed slurry;

pouring the first mixed slurry between the first facing paper and the second facing paper to form a slab;

drying the mat.

Preferably, the preparation of the paper-faced gypsum board with the external surface of the first and/or second facing paper coated with the negative ion liquid comprises the following steps:

uniformly mixing the negative ion liquid and water in proportion to obtain a second mixed solution;

uniformly mixing all the components of the gypsum board core in proportion to form second mixed slurry;

pouring the second mixed slurry between two common facing paper to form a plate blank;

drying the slab;

and uniformly spraying the second mixed solution on the outer surface of at least one of the two common protective paper of the dried plate blank to prepare the paper-surface gypsum board with the outer surface of the first protective paper and/or the second protective paper coated with the negative ion liquid.

Preferably, the preparation of the paper-faced gypsum board filled with the negative ion liquid in the first and/or second protective paper comprises the following steps:

uniformly mixing the negative ion liquid and the paper pulp in proportion to obtain a third mixed solution;

preparing the third mixed solution into the first protective paper and/or the second protective paper;

uniformly mixing all the components of the gypsum board core in proportion to form third mixed slurry;

pouring the third mixed slurry between the first facing paper and the second facing paper to form a plate blank;

drying the mat.

Preferably, the mass ratio of the effective components of the negative ion powder in the negative ion liquid base to the first protective paper or the second protective paper is 5-15 g/m²。

Compared with the prior art, the invention has the technical effects that:

according to the anion powder-based paper-faced gypsum board, the outer surfaces of the first facing paper and/or the second facing paper are coated with anion powder, so that the path of indoor air permeating into the anion powder is shortened, the indoor air is easier to interact with the anion powder to generate negative oxygen ions, and the anion powder-based paper-faced gypsum board has a better indoor air purification effect. When the negative ion powder is filled in the first protective paper and/or the second protective paper, the outer surface of the first protective paper and/or the second protective paper also has a considerable amount of negative ion powder due to uniform filling; in addition, first mask paper and/or second mask paper surface are porous structure, do benefit to indoor air to the inside diffusion of mask paper for indoor air can contact with more anion powder, thereby can produce more negative oxygen ions, has better air-purifying effect.

The preparation method of the anion powder-based paper gypsum board provided by the invention is characterized in that the solid anion powder is prepared into the high-dispersion water-soluble anion liquid, so that the content of the anion powder on the outer surface or the inner part of the first mask paper and/or the second mask paper is improved, the contact area of indoor air and the anion powder is increased, more anion ions can be generated, and the effect of better purifying air is achieved; and the highly dispersed water-soluble negative ion liquid can be dispersed more uniformly on the outer surface or inside of the first protective paper and/or the second protective paper, which is helpful for improving the stability of the air purifying capacity of the first protective paper and/or the second protective paper.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The embodiment of the invention provides an anion powder-based paper-surface gypsum board, which comprises:

a first cover paper;

a second cover paper; and

the gypsum board core is positioned between the first protective paper and the second protective paper and is integrally adhered with the first protective paper and the second protective paper;

the outer surface of the first protective paper and/or the second protective paper is coated or filled with negative ion powder.

The outer surfaces of the first protective paper and/or the second protective paper of the anion powder-based paper gypsum board prepared by the embodiment of the invention are coated with anion powder, so that the path of indoor air permeating into the anion powder is shortened, the indoor air is easier to interact with the anion powder to generate negative oxygen ions, and the anion powder-based paper gypsum board has a better indoor air purification effect. When the negative ion powder is filled in the first protective paper and/or the second protective paper, the outer surface of the first protective paper and/or the second protective paper also has a considerable amount of negative ion powder due to uniform filling; in addition, first mask paper and/or second mask paper surface are porous structure, do benefit to indoor air to the inside diffusion of mask paper for indoor air can contact with more anion powder, thereby can produce more negative oxygen ions, has better air-purifying effect.

Preferably, the mass ratio of the active ingredients of the negative ion powder to the first protective paper or the second protective paper is 5-15 g/m2, and the negative ion powder comprises the following ingredients: tourmaline powder, rare earth oxide and rare earth salt. The rare earth oxides and rare earth salts may be oxides or salts of lanthanum, yttrium or cerium. The permanent electric field on the surface of the tourmaline powder can continuously ionize active molecules in the air; the electron flow generated by rare earth salt and rare earth oxide collides with oxygen molecules in the air to generate negative oxygen ions and combines with neutral molecules in the air to generate air negative ions on the one hand, and on the other hand, the electron flow neutralizes the positive ions generated by the ionization of the air by tourmaline to promote the further ionization of the air molecules by the tourmaline. Through the synergistic effect of tourmaline, rare earth oxide and rare earth salt, oxygen and water molecules in the air are excited to form hydrated negative oxygen ions [ O ]₂ ^-(H₂O)_n]Or hydrated hydroxide ions [ OH^-(H₂O)_n]. Far infrared band released by tourmaline belongs to life light, can activate human body cells, and is rich in health preserving components.

Preferably, the mass ratio of the tourmaline powder, the rare earth oxide and the rare earth salt is (4-5): (4-5): (0-1), and the anion powder can generate enough negative oxygen ions in the proportion. The negative ion powder has a mesh number of 800-3000 and the GM count in the avalanche region is 15000-50000 ions/cc.

Preferably, the gypsum board core comprises the following ingredients: gypsum slurry, fiber reinforced material, foaming agent, binder and auxiliary agent. The gypsum slurry is composed of powdery cementing materials of building gypsum and water, and the fiber reinforced materials can effectively improve the strength of the gypsum board. The foaming agent is colorless and transparent liquid in appearance, the effective component is more than or equal to 30 percent, the petroleum ether soluble substance is less than or equal to 3.0 percent, the inorganic salt is less than or equal to 2.5 percent, the pH value is 7 +/-0.2, the foam amount is more than or equal to 190mm, and the foam height is not more than 5mm after the foaming effect is 5 min. The foaming agent is added into the gypsum slurry, so that the gypsum slurry obtains a high-quality foaming effect, meanwhile, the quality of the paper-surface gypsum board is reduced, the brittleness of the board is improved, and the heat insulation performance is improved.

Preferably, the fibrous reinforcement is glass fibers. The wire mesh structure of the glass fiber can well coordinate the flexibility and the rigidity of the gypsum board, so that the gypsum board has higher strength.

Preferably, the starch content of the binder is more than 70%, the water content is 11% -13%, the pH value is 6.5-7.5, the protein is less than or equal to 0.2%, and the solubility of the binder in water at 20-40 ℃ is 73% -78%. The binder can increase the adhesive properties of the gypsum slurry.

Preferably, the auxiliary agent is at least one of a coagulant, a water reducing agent, a dispersing agent and a toughening agent. The auxiliary agent can improve the performance of the gypsum slurry, facilitate the setting of the gypsum slurry or enhance the toughness of the gypsum board.

The invention also provides a preparation method of the anion powder-based paper-surface gypsum board, which comprises the following steps:

(1) preparing high-dispersion water-soluble negative ion liquid;

(2) and preparing a paper-faced gypsum board with the outer surface of the first protective paper and/or the second protective paper coated or filled with the negative ion liquid.

The preparation method of the anion powder-based paper-faced gypsum board disclosed by the embodiment of the invention is characterized in that the solid anion powder is prepared into the high-dispersion water-soluble anion liquid, so that the content of the anion powder on the outer surface or the inner part of the first face-protecting paper and/or the second face-protecting paper is improved, the contact area of indoor air and the anion powder is increased, more anion can be generated, and the effect of better purifying air is achieved; and the highly dispersed water-soluble negative ion liquid can be dispersed more uniformly on the outer surface or inside of the first protective paper and/or the second protective paper, which is helpful for improving the stability of the air purifying capacity of the first protective paper and/or the second protective paper.

Preferably, the highly dispersed water-soluble negative ion liquid prepared in step (1) is prepared by adopting a high-speed rotation dispersion method for negative ion powder, water and a surfactant. The surfactant can be selected from sodium dodecyl benzene sulfonate, stearic acid, sodium dodecyl sulfate, etc.

Preferably, the following steps can be adopted for preparing the paper-faced gypsum board with the outer surface of the first protective paper and/or the second protective paper coated with the negative ion liquid:

(201) uniformly mixing the negative ion liquid and water in proportion to obtain a first mixed solution;

(202) uniformly spraying the first mixed solution on the outer surface of the common mask paper to obtain first mask paper and/or second mask paper;

(203) uniformly mixing all components of the gypsum board core in proportion to form first mixed slurry;

(204) pouring the first mixed slurry between the first protective paper and the second protective paper to form a plate blank;

(205) the mat is dried.

Preferably, the following steps can be further adopted for preparing the paper-faced gypsum board with the first protective paper and/or the second protective paper coated with the negative ion liquid on the outer surface:

(211) uniformly mixing the negative ion liquid and water in proportion to obtain a second mixed solution;

(212) uniformly mixing all the components of the gypsum board core in proportion to form second mixed slurry;

(213) pouring the second mixed slurry between two common protective paper sheets to form a plate blank;

(214) drying the plate blank;

(215) and uniformly spraying the second mixed solution on the outer surface of at least one of the two common protective paper of the dried plate blank to prepare the paper-surface gypsum board of which the outer surface of the first protective paper and/or the second protective paper contains the negative ion liquid.

Preferably, the mass ratio of the negative ion liquid to the water in the steps (201) and (211) is (1.5-3.0): 10. the first mixed solution is prepared under stirring, and the first mixed solution is quickly stirred and then slowly stirred, so that the negative ion liquid and the water are uniformly mixed. The rapid stirring time is 10-30 min, and the rapid stirring speed is 500-1000 rpm; the slow stirring speed is 100-300 r/min.

Preferably, the spraying amount of the first mixed solution and the second mixed solution in the steps (202) and (215) is 20-50 g/m²。

Preferably, the slab is dried in the steps (205) and (214) for 50-80min at 80-100 ℃, and the temperature is reduced to room temperature after drying.

Preferably, the preparation of the paper-faced gypsum board filled with the negative ion liquid in the first protective paper and/or the second protective paper comprises the following steps:

(221) uniformly mixing the negative ion liquid and the paper pulp in proportion to obtain a third mixed solution;

(222) preparing the third mixed solution into first protective paper and/or second protective paper;

(223) uniformly mixing all the components of the gypsum board core in proportion to form third mixed slurry;

(224) pouring the third mixed slurry between the first protective paper and the second protective paper to form a plate blank;

(225) the mat is dried.

Preferably, the mass ratio of the negative ion liquid to the pulp in the step (221) is (2.0-3.0): 10.

preferably, in the step (225), the slab is dried for 50-80min at 80-100 ℃, and the temperature is reduced to room temperature after drying.

More preferably, a silane coupling agent may be further added to the third mixed solution prepared in the step (221), and the silane coupling agent may be added to promote the negative ion powder inside the first and/or second cover paper to migrate to the outer surface of the cover paper during the drying process of the slab in the step (225). Therefore, more negative ion powder is contacted with the air on the outer surface of the mask paper, which is more beneficial to the generation of negative oxygen ions.

The above silane coupling agent may be in a form common in the art, such as KH-550, KH-560, KH-570, or the like.

In a specific embodiment of adding the silane coupling agent, the silane coupling agent and the anion powder are first put into a solvent such as methanol, ethanol or isopropanol and uniformly dispersed to obtain a modified anion powder. The ultrasonic dispersion is used, the power of the ultrasonic dispersion can be 100-1000W, and the ultrasonic time is 10-30 min. The purpose of ultrasonic dispersion is to distribute silane coupling agent on the surface of the anion powder to modify the surface of the anion powder, thereby ensuring that the silane coupling agent and the anion powder generate firmer bonding force than the physical mode. And mixing the modified negative ion powder with other components of the negative ion liquid to obtain the modified negative ion liquid.

The following is a further description with reference to specific examples.