阅读说明：本技术 一种珍珠岩保温板及其制作工艺 (Perlite insulation board and manufacturing process thereof ) 是由 谢志伦 于 2021-08-23 设计创作，主要内容包括：本发明提出一种珍珠岩保温板及其制作工艺,涉及保温板加工技术领域。该珍珠岩保温板包括按重量份数计的以下原料：珍珠岩30-40份、粘接剂10-15份、脱硫石膏5-8份、水泥3-4份以及杨絮纤维8-15份。该珍珠岩保温板主要以珍珠岩作为骨料,并以脱硫石膏和水泥辅助填充材料提升其硬度和强度,共同配合形成板材,而杨絮纤维既能增强该板材的保温性能,还能增强其防水性能,同时,杨絮纤维为中空纤维,质量较轻,能够大大降低保温板的密度。另外,该珍珠岩保温板制作工艺将珍珠岩膨化后于其他原料混合,制作周期较短,成本较低,适合民用建筑使用,性价比较高。(The invention provides a perlite insulation board and a manufacturing process thereof, and relates to the technical field of insulation board processing. The perlite insulation board comprises the following raw materials in parts by weight: 30-40 parts of perlite, 10-15 parts of adhesive, 5-8 parts of desulfurized gypsum, 3-4 parts of cement and 8-15 parts of poplar fiber. This perlite insulation board mainly uses the pearlite as the aggregate to promote its hardness and intensity with desulfurization gypsum and the supplementary filler material of cement, cooperate jointly and form panel, and the poplar wadding fibre can strengthen the thermal insulation performance of this panel, can also strengthen its waterproof performance, and simultaneously, the poplar wadding fibre is hollow fiber, and the quality is lighter, density that can greatly reduced insulation board. In addition, the perlite insulation board manufacturing process mixes the perlite with other raw materials after the perlite is expanded, has short manufacturing period and low cost, is suitable for civil buildings, and has high cost performance.)

1. The perlite insulation board is characterized by comprising the following raw materials in parts by weight: 30-40 parts of perlite, 10-15 parts of adhesive, 5-8 parts of desulfurized gypsum, 3-4 parts of cement and 25-35 parts of poplar fiber.

2. A perlite insulation board as defined in claim 1, wherein said binder comprises 5-10 parts by weight of phenolic resin, 2-5 parts by weight of chitosan, 5-8 parts by weight of acrylic acid and 0.5-0.8 parts by weight of persulfate.

3. The perlite insulation board according to claim 1 or 2, further comprising 0.1-0.3 parts by weight of graphene flame retardant.

4. A process for making a perlite insulation board as defined in any one of claims 1 to 3, characterised by comprising the steps of:

the perlite insulation board is prepared by performing expansion pretreatment on perlite to prepare expanded perlite, grinding and mixing the expanded perlite, the desulfurized gypsum and the cement, adding an adhesive, uniformly mixing, adding poplar fiber to prepare slurry, and pressing the slurry to mold.

5. The manufacturing process according to claim 4, wherein the swelling pretreatment essentially comprises the steps of: firing the perlite at 300-350 ℃ for 1-1.5 h, then heating to 700-720 ℃ for firing for 8-11 min, and naturally cooling to obtain the expanded perlite.

6. The manufacturing process of claim 4, wherein the particle size of the expanded perlite and the desulfurized gypsum after grinding is 5-14 μm.

7. The process of claim 4, wherein the poplar fiber batt is 1 μm to 3 μm in length.

8. The manufacturing process according to claim 4, wherein the lamination molding process is performed at a temperature of 130 ℃ to 150 ℃.

9. The manufacturing process of claim 8, wherein after the pressed film is formed, the perlite heat-insulation board is irradiated under ultraviolet rays for 10min to 20min, and the intensity of the ultraviolet rays is 100mW/m²-120mW/m²。

10. The process according to claim 4, wherein the adhesive has a viscosity of 60-80 Pa-s.

Technical Field

The invention relates to the technical field of insulation board processing, in particular to a perlite insulation board and a manufacturing process thereof.

Background

The heat-insulating board is a heat-insulating material for buildings, is usually a hard heat-insulating board which is made of polystyrene resin serving as a raw material and other materials and polymers serving as auxiliary materials through heating, mixing and extrusion molding, and has the moisture-proof, fire-proof and heat-insulating properties. However, the fireproof effect of the plastic insulation board cannot achieve the expected effect of preventing fire, and the use effect is not good. In view of the disadvantages of the fireproof performance, a rock wool insulation board has been developed, which has better incombustibility, better high temperature resistance, acid and alkali resistance, corrosion resistance, aging resistance and the like, better fireproof effect, lower hardness, easy damage in the storage and transportation process and lower use value.

Disclosure of Invention

The invention aims to provide a perlite heat-insulating board which not only has a good fireproof effect, but also has high hardness, light weight and high use value, is convenient to store and transport, and can also effectively prevent the heat-insulating board from being damaged in the storing and transporting processes.

The invention also aims to provide a manufacturing process of the perlite heat-insulation board, which can manufacture a heat-insulation board with light weight and strong hardness, has a short manufacturing period and is suitable for civil buildings.

The technical problem to be solved by the invention is realized by adopting the following technical scheme.

On one hand, the invention provides a perlite insulation board which comprises the following raw materials in parts by weight: 30-40 parts of perlite, 10-15 parts of adhesive, 5-8 parts of desulfurized gypsum, 3-4 parts of cement and 25-35 parts of poplar fiber.

On the other hand, the invention provides a manufacturing process of a perlite heat-insulation board, which mainly comprises the following steps:

the perlite insulation board is prepared by performing expansion pretreatment on perlite to prepare expanded perlite, grinding and mixing the expanded perlite, the desulfurized gypsum and the cement, adding an adhesive, uniformly mixing, adding poplar fiber to prepare slurry, and pressing the slurry to form the perlite insulation board.

The perlite heat-insulation board and the manufacturing process thereof provided by the embodiment of the invention at least have the following beneficial effects:

the invention provides a perlite insulation board which mainly comprises the following raw materials in parts by weight: 30-40 parts of perlite, 10-15 parts of adhesive, 5-8 parts of desulfurized gypsum, 3-4 parts of cement and 25-35 parts of poplar fiber. This perlite heated board mainly uses the pearlite as the aggregate to desulfurized gypsum and cement supplementary filling material cooperate jointly and form panel, and poplar wadding fibre can strengthen the thermal insulation performance of this panel, can also strengthen its waterproof performance, and simultaneously, poplar wadding fibre is hollow fiber, and the quality is lighter, so can the density of greatly reduced heated board. In addition, the perlite has good hardness, fireproof performance, heat insulation performance, corrosion resistance and waterproof performance, and the perlite is light in weight after being subjected to bulking treatment, so that the perlite serves as a main framework raw material of the insulation board, the insulation effect of the insulation board is good, and meanwhile, the perlite has the hardness and the fireproof performance which are beneficial to storage and transportation. In addition, in the invention, the desulfurized gypsum and the cement are used as auxiliary filling materials, and the desulfurized gypsum and the cement can fill the perlite and are matched with the perlite to form the insulation board with higher hardness, so that the insulation board is more convenient to store and transport and has better integrity. In addition, with binder with pearlite, desulfurized gypsum, cement and poplar wadding fibre bonding shaping, make the heated board, so, the binder not only can further strengthen the flexural strength and the compressive strength of heated board, can also play the protection effect, use value is better. Therefore, the perlite is used as the aggregate, the desulfurized gypsum and the cement are used as auxiliary filling materials, the density of the insulation board is reduced through the poplar fiber, the waterproof performance of the insulation board is enhanced, the moisture absorption performance of the insulation board is reduced, and then the raw materials and the reacted substances of the raw materials are bonded through the adhesive to manufacture the board, so that the application value is high.

In addition, the invention also provides a manufacturing process of the perlite, which mainly comprises the following steps: the perlite insulation board is prepared by performing expansion pretreatment on perlite to prepare expanded perlite, grinding and mixing the expanded perlite, the desulfurized gypsum and the cement, adding an adhesive, uniformly mixing, adding poplar fiber to prepare slurry, and pressing the slurry to form the perlite insulation board. This preparation technology can make the pearlite inflation, and density reduces, then bonds the raw materials together through the adhesive, simultaneously, at mixed bonding and fashioned in-process, can react between the raw materials to this further promotes hardness, and the effect is better. Moreover, the manufacturing process has a short manufacturing period, so that the cost is reduced, and the manufacturing process is suitable for civil buildings and has high cost performance.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to specific examples.

The invention provides a perlite insulation board which mainly comprises the following raw materials in parts by weight: 30-40 parts of perlite, 10-15 parts of adhesive, 5-8 parts of desulfurized gypsum, 3-4 parts of cement and 25-35 parts of poplar fiber. This perlite heated board mainly uses the pearlite as the aggregate, constructs the frame, then with desulfurization gypsum and cement auxiliary filling material, cooperates jointly and forms panel, and poplar wadding fibre can strengthen the thermal insulation performance of this panel, can also strengthen its waterproof performance, and simultaneously, poplar wadding fibre is hollow fiber, and the quality is stronger, so can the quality of greatly reduced heated board. In addition, in the invention, the desulfurized gypsum and the cement are used as auxiliary filling materials, and the desulfurized gypsum and the cement can fill the perlite and are matched with the perlite to form the insulation board with higher hardness, so that the insulation board is more convenient to store and transport and has better integrity. In addition, with binder with pearlite, desulfurized gypsum, cement and poplar wadding fibre bonding shaping, make the heated board, so, the binder not only can further strengthen the flexural strength and the compressive strength of heated board, can also play the protection effect, use value is better.

The specific properties of the aforementioned raw materials are as follows:

perlite: perlite is a volcanically erupted acid lava, and is a vitreous rock formed by rapid cooling, and mainly comprises perlite, obsidian and pitchstone. The perlite has a Mohs hardness of 5.5-7 and a density of 2.2g/cm³-2.4g/cm³The fire resistance of the insulation board is 1300-1380 ℃, so that the hardness, the fire resistance and the heat insulation performance of the perlite are good, the insulation board has good fire resistance and incombustibility, and the hardness is high, so that the insulation board is convenient to store, transport and use, and has high value. In addition, the main chemical components of perlite are silica, alumina, iron oxide, calcium oxide and potassium oxide, and thus it can be seen thatThe stability of the perlite is good, and the perlite is not easily influenced by the environment. For example, when the environment is wet, the waterproof performance is good, and the moisture in the environment can not be absorbed, so that the property and the service life of the insulation board are not influenced. And when the environment is comparatively dry, because moisture content is few in this heated board, be difficult for losing to the environment in to effectively prevent the emergence of phenomenon such as fracture, stability is better.

It should be noted here that the expansion multiple of perlite is 4-25 times, the expansion effect is better, the quality of the insulation board can be effectively reduced, and the use value is higher. In detail, when the perlite is calcined at high temperature, it is softened by heat, and the water in the perlite is converted into water vapor, which generates a large pressure, and the volume of the perlite expands, and the density decreases and the weight is light. In addition, because the perlite has a plurality of holes in the expanded structure, the perlite can be used as the aggregate of the insulation board, and the manufacturing effect is better. Moreover, the perlite with the porous structure has better sound absorption and sound insulation effects and is suitable for buildings.

Desulfurized gypsum: the desulfurized gypsum is also called flue gas desulfurization gypsum, sulfur gypsum or FGD gypsum, and the main component is calcium sulfate dihydrate. The desulfurized gypsum is a building material which does not contain formaldehyde and has no radioactivity, and after being ground into fine powder and mixed with a binder, the desulfurized gypsum and cement can be coagulated together into a substance with stronger hardness and matched with perlite to form a heat-insulation board with stronger hardness. And the output of desulfurization gypsum is abundant, and the cost is lower to this cost that reduces the heated board promotes its price/performance ratio.

Cement: cement is a powdered hydraulic inorganic gelling material that can be mixed with water, converted into a slurry, and hardened in air. Therefore, when the cement and the desulfurized gypsum are mixed, and after the adhesive is added into the cement and the desulfurized gypsum, the cement and the desulfurized gypsum can react with the water in the bonding and the combined water in the desulfurized gypsum to jointly form the heat-insulation board with stronger hardness, and simultaneously, the breaking strength, the compressive strength and the wear resistance can be greatly improved to achieve the expected effect.

Poplar fiber: the Populus flocculus is named as Populus tomentosa flower flocculus, Populus cotton, Populus macrophylla flower flocculus and the like, and belongs to Populaceae and Populus. The poplar catkin has higher fiber content, is easy to extract and process, and therefore, the poplar catkin has more and easy-to-obtain paths and lower cost. Moreover, the heat-resistant and heat-insulating effect of the poplar fiber can effectively improve the heat-insulating effect of the heat-insulating plate when the poplar fiber is used as one of the raw materials of the heat-insulating plate. It should be noted here that the poplar fiber has a large hollow structure, that is, the inside of the fiber is a channel and is cylindrical, so that the weight of the poplar fiber is light. When adding it to the heated board in, its density that can effectively reduce the heated board lightens weight, does benefit to the transportation. Simultaneously, the poplar wadding fibre has better hydrophobic effect, consequently, it can further make the water-proof effects of heated board better. Due to the hollow structure, the sound insulation and absorption effects of the heat insulation plate are also improved, and the heat insulation plate is high in use value.

Therefore, the perlite is used as aggregate, the cement and the desulfurized gypsum are used as auxiliary filling materials, the hardness, the strength and the wear resistance of the perlite are enhanced, then the density of the insulation board can be greatly reduced by the poplar fiber, the quality of the insulation board is reduced, and the applicability and the practicability of the insulation board are effectively improved.

Moreover, the proportion of the raw materials is reasonable, the loss amount of the raw materials in the manufacturing process is included, the hardness, the strength, the wear resistance and the quality of the insulation board manufactured according to the proportion all achieve the expected effect, and the insulation board conforms to the use standard of civil buildings.

In the invention, the adhesive comprises 5-10 parts by weight of phenolic resin, 2-5 parts by weight of chitosan, 5-8 parts by weight of acrylic acid and 0.5-0.8 part by weight of persulfate. The phenolic resin and the chitosan can react with monomer acrylic acid to form an organic adhesive with a larger molecular weight, so that the bonding effect and the bonding strength of the adhesive are improved. The persulfate is used as the initiator, so that the reaction can be quickly carried out, the preparation time of the adhesive is shortened, the success efficiency of the adhesive preparation can be effectively improved, and the using effect is better. Acrylic acid can be polymerized to form polyacrylic acid organic matter, carboxylate radicals on the polyacrylic acid can perform dehydration reaction with phenolic hydroxyl groups in the phenolic resin and hydroxyl groups on the chitosan, and then the porous adhesive is formed. Moreover, hydrogen bonds with strong acting force can be formed between hydroxyl groups in the raw materials, so that the adhesive has better adhesive effect. After the adhesive is cured, the adhesive has the same good strength and higher use value and practical value. It should be noted here that the persulfate can generate radicals in the aqueous solution, which can effectively enhance the activity of groups on the macromolecular phenolic resin and chitosan, accelerate the reaction speed, and achieve the desired preparation effect.

Therefore, when the binder is used for adhering the perlite, the desulfurized gypsum, the cement and the poplar fiber, after solidification, the hardness, the strength and the wear resistance of the insulation board can be further enhanced, and the effect is better.

In the invention, the perlite insulation board also comprises 0.1-0.3 part by weight of graphene flame retardant, so that the heat insulation and flame retardant effects of the insulation board are enhanced. Specifically, when the graphene is used as a flame retardant, the flame retardant effect is excellent, and when the addition amount of the graphene flame retardant is 0.1-0.3 parts by weight, the flame retardant effect can be effectively improved.

The invention provides a manufacturing process of a perlite insulation board, which mainly comprises the following steps: the perlite insulation board is prepared by performing expansion pretreatment on perlite to prepare expanded perlite, grinding and mixing the expanded perlite, the desulfurized gypsum and the cement, adding an adhesive, uniformly mixing, adding poplar fiber to prepare slurry, and pressing the slurry to form the perlite insulation board.

Wherein, the expanded perlite is prepared by firing the perlite for 1h to 1.5h at 300 ℃ to 350 ℃, then heating to 700 ℃ to 720 ℃ for firing for 8min to 11min, and naturally cooling. The primary heating firing process can achieve the preheating effect, transfer heat to moisture in the primary heating firing process, and simultaneously vaporize part of moisture easy to vaporize to form a pore-diameter channel preliminarily. Then, the temperature is gradually increased to 700-720 ℃, so that the residual part of the combined water can be vaporized again and is flushed out through the preformed aperture channels, the aperture of the aperture channels is enlarged, and the density of the aperture channels is reduced. Moreover, the gradual temperature rise in the second stage can enable the volume of the perlite to expand, and the expansion multiple is larger. When attention needs to be paid, the pores formed by vaporization and punching can be more compact by two-stage temperature rise, and the perlite has better strength and is suitable for being used as a building material.

Then, the expanded perlite, the desulfurized gypsum and the cement are ground and mixed. Because the desulfurized gypsum and the expanded perlite are easy to present in a blocky shape, the desulfurized gypsum and the expanded perlite are beneficial to compression molding after being ground into particles. The particle size of the ground expanded perlite and the ground desulfurized gypsum is 5-14 mu m, so that the insulation board with higher hardness and strength can be formed. When the particle size is smaller, the grinding cost is higher, and when the particle size is larger, the fluidity is poor and the quality of the plate is poor.

After grinding and mixing, the adhesive is added into the mixture and evenly mixed, and then the poplar fiber is added to prepare the slurry, so that the floating of the poplar fiber can be reduced, the loss of the poplar fiber is reduced, the mixing degree of the raw materials can be more uniform, and the quality of the insulation board is improved. According to the invention, the length of the poplar fiber is 1-3 μm, so that the insulation board can be prevented from being fibrous, and the touch feeling is better. Moreover, when the fiber length is longer, the fiber is not easy to be mixed with perlite, desulfurized gypsum and cement raw materials, so the strength is affected therewith, and the effect is not good.

And injecting the slurry into a mold for pressing, wherein the process is carried out at the temperature of 130-150 ℃, so that the shape of the product can be ensured not to change in the pressing forming process, and the quality of the product is better. Then irradiating the prepared perlite heat-insulating board for 10min-20min under ultraviolet rays with the intensity of 100mW/m²-120 mW/m². The process can completely cure the adhesive, and enable the raw materials to be tightly bonded, so that the hardness is higher and the strength is better. It is also noted here that the viscosity of the adhesive is from 60 pas to 80 pas, in order to achieve the desired blocking and curing effect. When the viscosity is lower, the forming is difficult, the shape is easy to damage, the yield is low, and when the viscosity is higher, the fluidity is poorer, the difficulty of uniform stirring is higher, the time cost of manufacturing is increased successively, and the effect is poor.

The perlite insulation board and the color-coated steel plate can be pressed together through glue to prepare a color steel-perlite composite board, so that the corrosion resistance, compression resistance and breaking strength of the use surface of the perlite insulation board are enhanced. Moreover, the color-coated steel plate ensures that the perlite composite board has bright color, is suitable for various environments and has stronger practicability.

The features and properties of the present invention are described in further detail below with reference to examples.

Example 1

An object of this embodiment is to provide a perlite insulation board, including the following raw materials: 35kg of perlite, 13kg of adhesive, 5.5kg of desulfurized gypsum, 3.5kg of cement and 30kg of poplar fiber.

The adhesive comprises 7kg of phenolic resin, 3.5kg of chitosan, 6.5kg of acrylic acid and 0.6kg of potassium persulfate.

The manufacturing process of the perlite insulation board comprises the following steps:

firing the perlite at 330 ℃ for 1.2h, then heating to 700 ℃ for firing for 10min, and naturally cooling to obtain the expanded perlite. Grinding and mixing the expanded perlite, the desulfurized gypsum and the cement (the particle size of the perlite and the desulfurized gypsum is 10 mu m), adding an adhesive with the viscosity of 70 Pa.s, uniformly mixing, adding poplar fiber with the length of 2 mu m to prepare slurry, then pressing and molding the slurry at the temperature of 140 ℃ to prepare the perlite heat-insulating board, irradiating the perlite heat-insulating board for 15min under ultraviolet rays with the intensity of 110mW/m²And obtaining the product.

Example 2

An object of this embodiment is to provide a perlite insulation board, including the following raw materials: 30kg of perlite, 10kg of adhesive, 5kg of desulfurized gypsum, 3kg of cement and 25kg of poplar fiber.

The adhesive comprises 5kg of phenolic resin, 2kg of chitosan, 5kg of acrylic acid and 0.5kg of potassium persulfate.

The manufacturing process of the perlite insulation board comprises the following steps:

firing the perlite at 300 ℃ for 1.5h, then heating to 710 ℃ for firing for 8min, and naturally cooling to obtain the expanded perlite. Grinding and mixing the expanded perlite, the desulfurized gypsum and the cement (perlite and cement)The particle size of the desulfurized gypsum is 14 mu m), adding an adhesive with the viscosity of 60Pa s, uniformly mixing, adding poplar fiber with the length of 1 mu m to prepare slurry, then pressing the slurry to form a film at the temperature of 130 ℃ to prepare the perlite heat-insulating board, and irradiating the perlite heat-insulating board for 10min under ultraviolet with the intensity of 120mW/m²And obtaining the product.

Example 3

An object of this embodiment is to provide a perlite insulation board, including the following raw materials: 40kg of perlite, 15kg of adhesive, 8kg of desulfurized gypsum, 4kg of cement, 35kg of poplar fiber and 0.2kg of graphene flame retardant.

The adhesive comprises 10kg of phenolic resin, 5kg of chitosan, 8kg of acrylic acid and 0.8kg of potassium persulfate.

The manufacturing process of the perlite insulation board comprises the following steps:

firing the perlite at 350 ℃ for 1h, then heating to 720 ℃ for firing for 8min, and naturally cooling to obtain the expanded perlite. Grinding and mixing the expanded perlite, the desulfurized gypsum and the cement (the particle size of the perlite and the desulfurized gypsum is 5 mu m), adding an adhesive with the viscosity of 80 Pa.s, uniformly mixing, adding poplar fiber with the length of 3 mu m to prepare slurry, then pressing and molding the slurry at the temperature of 150 ℃ to prepare the perlite heat-insulating board, irradiating the perlite heat-insulating board for 20min under ultraviolet rays with the intensity of 100mW/m²And obtaining the product.

Example 4

An object of this embodiment is to provide a perlite insulation board, including the following raw materials: 33kg of perlite, 11kg of adhesive, 6kg of desulfurized gypsum, 3.2kg of cement, 28kg of poplar fiber and 0.1kg of graphene flame retardant.

The adhesive comprises 6kg of phenolic resin, 2.8kg of chitosan, 5.3kg of acrylic acid and 0.55kg of potassium persulfate.

The manufacturing process of the perlite insulation board comprises the following steps:

firing the perlite at 310 ℃ for 1.4h, then heating to 705 ℃ for firing for 9min, and naturally cooling to obtain the expanded perlite. Grinding and mixing the expanded perlite, the desulfurized gypsum and the cement (pearl)The particle diameter of the perlite and the desulfurized gypsum is 10 mu m), adding an adhesive with the viscosity of 65Pa s, uniformly mixing, adding poplar catkin fibers with the length of 1.5 mu m to prepare slurry, then pressing and molding the slurry at 135 ℃ to prepare the perlite insulation board, irradiating the perlite insulation board for 13min under ultraviolet rays with the intensity of 115mW/m²And obtaining the product.

Example 5

An object of this embodiment is to provide a perlite insulation board, including the following raw materials: 38kg of perlite, 14kg of adhesive, 7.5kg of desulfurized gypsum, 3.8kg of cement, 33kg of poplar fiber and 0.3kg of graphene flame retardant.

The adhesive comprises 9kg of phenolic resin, 4.5kg of chitosan, 7.5kg of acrylic acid and 0.7kg of potassium persulfate.

The manufacturing process of the perlite insulation board comprises the following steps:

firing the perlite at 340 ℃ for 1.1h, then heating to 718 ℃ for firing for 9min, and naturally cooling to obtain the expanded perlite. Grinding and mixing the expanded perlite, the desulfurized gypsum and the cement (the particle size of the perlite and the desulfurized gypsum is 7 mu m), adding an adhesive with the viscosity of 75 Pa.s, uniformly mixing, adding poplar fiber with the length of 2.5 mu m to prepare slurry, then pressing and molding the slurry at the temperature of 145 ℃ to prepare the perlite heat-insulating board, irradiating the perlite heat-insulating board for 18min under ultraviolet rays with the intensity of 105mW/m²And obtaining the product.

Examples of effects

The products prepared in example 1 and example 4 were subjected to performance tests, the results of which are shown in table 1, the test methods being as follows:

flame retardant property: vertically fixing the product in a combustion cylinder, charging oxygen and nitrogen with certain concentration, igniting the top end of the sample by using an igniter, observing the combustion condition of the sample, adjusting the oxygen concentration according to the oxygen concentration until the lowest oxygen concentration when the sample just maintains balanced combustion is measured, and expressing the oxygen content percentage, wherein the result is shown in table 1;

flexural and compressive strength: the performance detection of the compression resistance and the breaking strength is according to GB/T28627-2012 and GB/T17669.4-1999, and the results are shown in Table 1;

wear resistance: testing by a Mohs hardness testing method;

moisture absorption performance: the product was placed in an environment with a relative humidity of 85% for 3 days, and the surface humidity before and after the placement was tested.

Table 1 results of performance testing of the products

Product(s)	Oxygen index	Flexural strength	Compressive strength	Mohs hardness	Moisture absorption property
						Example 1	32	3.4MPa	6.7MPa	6	<0.8％
Example 4	45	3.1MPa	6.6MPa	5	<0.6％

As can be seen from the above table, the oxygen index of the product is greater than 27, the product belongs to a flame-retardant material, and the flame retardant effect is better, and moreover, the graphene flame retardant is contained in the product prepared in embodiment 4, so the flame retardant effect is better. In addition, as can be seen from table 1, the product has mohs hardness equivalent to feldspar, better wear resistance, higher breaking strength and compressive strength, and is suitable for use. In addition, the moisture absorption is low, the moisture absorption is not easily influenced by a humid environment, and the use value and the practical value are high.

In summary, the invention provides a perlite insulation board, which mainly comprises the following raw materials in parts by weight: 30-40 parts of perlite, 10-15 parts of adhesive, 5-8 parts of desulfurized gypsum, 3-4 parts of cement and 8-15 parts of poplar fiber. This perlite heated board mainly uses the pearlite as the aggregate to desulfurized gypsum and cement supplementary filling material cooperate jointly and form panel, and poplar wadding fibre can strengthen the thermal insulation performance of this panel, can also strengthen its waterproof performance, and simultaneously, poplar wadding fibre is hollow fiber, and the quality is lighter, so can the quality of greatly reduced heated board. In addition, the perlite has good hardness, fireproof performance, heat insulation performance, corrosion resistance and waterproof performance, and the perlite is light in weight after being subjected to bulking treatment, so that the perlite serves as a main framework raw material of the insulation board, the insulation effect of the insulation board is good, and meanwhile, the perlite has the hardness and the fireproof performance which are beneficial to storage and transportation. In addition, in the invention, the desulfurized gypsum and the cement are used as auxiliary filling materials, and the desulfurized gypsum and the cement can fill the perlite and are matched with the perlite to form the insulation board with higher hardness, so that the insulation board is more convenient to store and transport and has better integrity. In addition, with binder with pearlite, desulfurized gypsum, cement and poplar wadding fibre bonding shaping, make the heated board, so, the binder not only can further strengthen the flexural strength and the compressive strength of heated board, can also play the protection effect, use value is better. Therefore, the perlite is used as the aggregate, the desulfurized gypsum and the cement are used as auxiliary filling materials, the density of the insulation board is reduced through the poplar fiber, the waterproof performance of the insulation board is enhanced, the moisture absorption performance of the insulation board is reduced, and then the raw materials and the reacted substances of the raw materials are bonded through the adhesive to manufacture the board, so that the application value is high.

In addition, the invention also provides a manufacturing process of the perlite, which mainly comprises the following steps: the perlite insulation board is prepared by performing expansion pretreatment on perlite to prepare expanded perlite, grinding and mixing the expanded perlite, the desulfurized gypsum and the cement, adding an adhesive, uniformly mixing, adding poplar fiber to prepare slurry, and pressing the slurry to form the perlite insulation board. This preparation technology can make the pearlite inflation, and density reduces, then bonds the raw materials together through the adhesive, simultaneously, at mixed bonding and fashioned in-process, can react between the raw materials to this further promotes hardness, and the effect is better. Moreover, the manufacturing process has a short manufacturing period, so that the cost is reduced, and the manufacturing process is suitable for civil buildings and has high cost performance.

The embodiments described above are some, but not all embodiments of the invention. The detailed description of the embodiments of the present invention is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.