CN105669247A - Method for preparing mildew-resistant paper-surface gypsum board - Google Patents

Abstract

A method for preparing a mildew-resistant paper-surface gypsum board is as follows: in the drying stage of a paper-surface gypsum board, the surface of the paper-surface gypsum board is sprayed with a mist-like mildew-resistant agent solution under vacuum conditions, and the temperature of the mist-like mildew-resistant agent solution is 60-90 DEG C; and the mildew-resistant paper-surface gypsum board prepared by the method can effectively prevent growth of mold on an adhesive layer between surface protective paper and a gypsum core sheet.

Description

A kind of preparation method of anti-fungicide paper surface gypsum board

Technical field

The preparation method that the present invention relates to a kind of anti-fungicide paper surface gypsum board.

Background technology

Thistle board is the preferred material of current house partition wall, has breathing performance, it is possible to adsorption moisture, and itself is containing multiple organic principle simultaneously; In humidity especially southern area, side significantly, in use easily there is Signs of Mould in Thistle board, and these mycetes directly affect the life of people and healthy; Mildew-resistant plasterboard in the market, antifungus agent liquid is mainly directly incorporated in Gypsum Fibrosum central layer by its preparation method, it is impossible to effectively prevent the growth of mycete.

Summary of the invention

The preparation method that it is an object of the invention to provide a kind of anti-fungicide paper surface gypsum board, the anti-fungicide paper surface gypsum board that the method is made can effectively prevent the growth of mycete on tack coat between mask paper and Gypsum Fibrosum central layer.

The technical solution adopted in the present invention is: the preparation method of a kind of anti-fungicide paper surface gypsum board, at Thistle board drying stage, under vacuum condition, to the antifungus agent solution that the injection of described Thistle board surface is vaporific, and the temperature of described antifungus agent solution is 60～90 DEG C.

It is preferred that described preparation method comprises the steps:

1) Thistle board is put in baking oven, at temperature 160～200 DEG C, dry 20～40min;

2) 80～120 DEG C are cooled the temperature to, the moisture content continuing to be dried to this Thistle board is 5%～15%, by this baking oven vacuum pumping state, and the antifungus agent solution that temperature is 60～90 DEG C is sprayed 10～30min with vaporific form to the Thistle board surface in baking oven;

3) pressure in baking oven is reverted to normal pressure, dry 10～30min at temperature 80～120 DEG C;

4) 40～60 DEG C are cooled the temperature to, dry 60～120min, obtain described anti-fungicide paper surface gypsum board.

It is preferred that the quality of the antifungus agent in described antifungus agent solution is described Thistle board quality 0.01%～0.1%.

It is preferred that in baking oven under vacuum conditions, when spraying vaporific antifungus agent solution, the absolute pressure in this baking oven is not less than 0.02Mpa.

It is preferred that described antifungus agent includes borate family antifungus agent.

It is preferred that before Thistle board is put in baking oven, also include

Gypsum Fibrosum and starch are mixed to form siccative, foaming agent and water are mixed to form wet feed, then described siccative are poured in described wet feed, stirring;

Before slip initial set after agitation, slurry is poured in the mould being pressed with mask paper, at the attached last layer mask paper of pulp surface, presses weight, to slip final set, form described Thistle board.

The invention has the beneficial effects as follows:

1, the preparation method of existing mildew-resistant plasterboard is to be directly incorporated in Gypsum Fibrosum central layer by antifungus agent liquid, it is concentrated mainly in the tack coat between mask paper and Gypsum Fibrosum central layer yet with the nutritional labeling of mycete in Thistle board, said method is made cannot effectively to prevent the growth of mycete, the preparation method of the present invention, by antifungus agent under vacuum, enter by the outside of gypsum board surface and mask paper with the form of mist state, the antifungus agent in the mildew-resistant plasterboard of production is made to concentrate in the tack coat between mask paper and Gypsum Fibrosum central layer, it is effectively prevented the growth of this place mycete.

2, in the present invention, antifungus agent enters Thistle board with the form of mist state, shortens antifungus agent and enters the process time of plasterboard; And make antifungus agent be evenly distributed, improve sheet material anti-mold effect.

3, in the present invention, the interpolation time of antifungus agent, at plasterboard drying stage, enters with mist state for antifungus agent and provides good environment, it is to avoid the antifungus agent impact on Gypsum slurry, make the antifungus agent will not change plasterboard material composition and timber intensity.

4, the antifungus agent interpolation time of the anti-fungicide paper surface gypsum board of present invention design is when Thistle board moisture content is 5%～15%, and give antifungus agent attachment time 10～30min, the method can increase the content of antifungus agent on sheet material, it is suppressed that fungus growth, suitably reduces production cost.

Detailed description of the invention

Embodiment 1:

The anti-fungicide paper surface gypsum board of the present invention includes Gypsum Fibrosum central layer and mask paper, the surface of described Gypsum Fibrosum central layer and mask paper are bonded to one, the component of the anti-fungicide paper surface gypsum board of the present invention includes: desulfurated plaster 500g, the starch of water 325g, 3g, 0.3g foaming agent, be of a size of the mask paper of 300mm*300mm containing 0.1g sodium tetraborate (being commonly called as Borax) and two.

The preparation method of the anti-fungicide paper surface gypsum board of the present invention is as follows:

A, the desulfurated plaster of above-mentioned quality and starch are dry mixed uniformly, by uniform to foaming agent and water wet mixing, above-mentioned siccative is poured in wet feed, it is mixed into slip, before slip initial set, slurry is poured in the mould being pressed with mask paper, at the attached last layer mask paper of pulp surface, press weight, to slip final set, make Thistle board;

B, the Thistle board made is put in the baking oven that temperature is 160 DEG C, dry 30min (drying process A section), the dried in this stage, the moisture in Thistle board can be removed;

C, oven temperature is down to 120 DEG C, the moisture content being dried to this Thistle board is 15%, by this baking oven vacuum pumping state, absolute pressure is 0.02MPa, 0.1g sodium tetraborate is added 50g water and makes solution, and to heat antifungus agent solution be 80 DEG C, by the antifungus agent solution after heating by the shower nozzle in baking oven, the surface of Thistle board it is injected in the form of mist state, injecting time is 30min (drying process B section), the dried in this stage, both the moisture of dried gypsum intralaminar part can have been continued, drying plaster boards can spray the moisture brought by antifungus agent solution again, ,

D, lay down vacuum, the pressure in baking oven is reverted to normal pressure, ON cycle wind, at temperature 120 DEG C, continues dry 30min (drying process C section); The dried in this stage, both can continue the moisture of dried gypsum intralaminar part, can spray the moisture brought by antifungus agent solution in drying plaster boards again;

E, the most at last oven temperature are down to 50 DEG C, dry 90min; Remove the moisture in Thistle board surface, obtain the anti-fungicide paper surface gypsum board of the present invention.

This embodiment makes antifungus agent enter in baking oven with mist state form, owing to baking oven is in vacuum state, temperature is higher, and antifungus agent solution trachea is sprayed in baking oven, and antifungus agent is uniformly distributed in drying baker, and it is attached to Thistle board surface, make antifungus agent from outward appearance to inner essence, be rapidly introduced into Paper-faced gyp intralaminar part, do not only reach good fungicidal properties, also do not change plasterboard material composition, do not affect timber intensity.

Prepare the anti-fungicide paper surface gypsum board in embodiment 2-4 according to the method described above, drying process such as table 1 in embodiment 2-4:

Table 1: anti-fungicide paper surface gypsum board drying process

Time	Drying process A section/min	Drying process B section/min	Drying process C section/min
				Embodiment 2	30	0	90
Embodiment 3	30	30	60
				Embodiment 4	30	90	0

Embodiment 5 prepares anti-fungicide paper surface gypsum board according to the method in embodiment 1, but the temperature adding antifungus agent solution is room temperature;Embodiment 6 is to be mixed with Gypsum Fibrosum by sodium borate, the Thistle board that rear addition water and other additives are made; The component of the Thistle board in embodiment 2-6 such as table 2:

Table 2 plasterboard component (content is mass percent):

	Starch/%	Foaming agent/%	Antifungus agent/%
				Embodiment 2	0.8	0.08	0.04
Embodiment 3	1.0	0.10	0.06
				Embodiment 4	1.1	0.11	0.08
Embodiment 5	1.2	0.12	0.10
				Embodiment 6	1.0	0.11	0.05

In above-described embodiment 1-6, in the anti-fungicide paper surface gypsum board process of its production, there is following phenomenon:

In embodiment 1, spray into after antifungus agent terminates under vacuum condition, be gradually brought to normal pressure, baking oven inwall and gypsum surface in baking oven and a little globule occurs.

In embodiment 2, the time of evacuation is longer, and after internally spraying into antifungus agent, it is very short that baking oven recovers the normal pressure time, can produce the substantial amounts of globule at baking oven inwall and gypsum board surface.

In embodiment 3, phenomenon is comparatively similar to example 1, but the time that the globule condensing in Thistle board surface immerses mask paper needs is slightly long.

In embodiment 4, phenomenon is similar to embodiment 3, but owing to, after adding antifungus agent, oven temperature becomes 50 DEG C, not only creates the substantial amounts of globule at baking oven inwall and gypsum board surface, and the later stage dries and needs the longer time.

In embodiment 5, in the antifungus agent entrance baking oven that temperature is relatively low, substantial amounts of steam in baking oven can be absorbed, intensification for antifungus agent solution, thus causing oven temperature and the reduction of sheet material temperature, affect the quality of sheet material, and the antifungus agent fog sprayed into causes because of the reduction of temperature in the substantial amounts of condensation of baking oven inwall and gypsum board surface, thus reducing the effective rate of utilization of antifungus agent. And in embodiment 1-4, the antifungus agent solution sprayed into is high temperature, not only increase the dissolubility of some antifungus agents, and can reduce because spraying into antifungus agent and impact on baking oven and sheet material temperature as far as possible.

Thistle board in above-described embodiment 1-6 is placed in mold incubator, the temperature regulated in mold incubator is 25 DEG C, humidity is 99%, test according to GB/T1741-2007 (paint film fungus resistance algoscopy), after 28 days, observing the situation of gypsum board surface, result draws, the gypsum board surface of embodiment 6 has a small amount of mycete, and the gypsum board surface of embodiment 1-5 does not have mycete to occur; After continuing cultivation 50 days, observing the situation of gypsum board surface, result draws, the gypsum board surface of embodiment 1-4 occurs still without mycete; Occurring a small amount of mycete in embodiment 5, in embodiment 6, mycete is increased.

In sum, the method using the present invention adds antifungus agent, can effectively improve the anti-mold effect of Thistle board, and the anti-mold effect of anti-fungicide paper surface gypsum board is had critically important impact by the temperature of antifungus agent and interpolation time, through experimental study, when the moisture content of Thistle board is when 5%～15%, it is deeper that antifungus agent is immersed in plasterboard, and anti-mold effect is better.

Although the embodiment that disclosed herein is as above, but described content is only to facilitate the embodiment understanding the present invention and adopt, is not limited to the present invention. Technical staff in any the technical field of the invention; under the premise without departing from the spirit and scope that disclosed herein; any amendment and change can be done in the formal and details implemented; but the scope of patent protection of the present invention, still must be as the criterion with the scope that appending claims defines.

Claims (6)

1. the preparation method of an anti-fungicide paper surface gypsum board, it is characterised in that: at Thistle board drying stage, under vacuum condition, to the antifungus agent solution that the injection of described Thistle board surface is vaporific, and the temperature of described antifungus agent solution is 60～90 DEG C.

2. preparation method according to claim 1, it is characterised in that: described preparation method comprises the steps:

1) Thistle board is put in baking oven, at temperature 160～200 DEG C, dry 20～40min;

2) 80～120 DEG C are cooled the temperature to, the moisture content continuing to be dried to this Thistle board is 5%～15%, by this baking oven vacuum pumping state, and the antifungus agent solution that temperature is 60～90 DEG C is sprayed 10～30min with vaporific form to the Thistle board surface in baking oven;

3) pressure in baking oven is reverted to normal pressure, dry 10～30min at temperature 80～120 DEG C;

4) 40～60 DEG C are cooled the temperature to, dry 60～120min, obtain described anti-fungicide paper surface gypsum board.

3. preparation method according to claim 1, it is characterised in that: the quality of the antifungus agent in described antifungus agent solution is the 0.01%～0.1% of described Thistle board quality.

4. preparation method according to claim 1, it is characterised in that: in baking oven under vacuum conditions, when spraying vaporific antifungus agent solution, the absolute pressure in this baking oven is not less than 0.02Mpa.

5. according to the arbitrary described preparation method of claim 2-4, it is characterised in that: described antifungus agent includes borate family antifungus agent.

6. according to the arbitrary described preparation method of claim 2-4, it is characterised in that: before Thistle board being put in baking oven, also include

Gypsum Fibrosum and starch are mixed to form siccative, foaming agent and water are mixed to form wet feed, then described siccative are poured in described wet feed, stirring;

Before slip initial set after agitation, slurry is poured in the mould being pressed with mask paper, at the attached last layer mask paper of pulp surface, presses weight, to slip final set, form described Thistle board.