Low cost insulating sheet glass mineral wool core material

Abstract

The application relates to the field of thermal insulation materials, in particular to a low-cost thermal insulation plate glass mineral cotton core material, wherein the short-cut mineral cotton is distributed in the core material in a forward paving mode to form a layered structure; in each layered structure, the short-cut mineral cotton is horizontally and continuously distributed to form a longitudinal and transverse interlaced distribution structure. The core material is a web felt formed by short-cut mineral cotton as raw material, and the components of the core material include SiO2, AL2O3, MgO, CaO, TFe2O3, TiO2, ZrO2, Na2O, K2O, Li2O, P2O5, SO3, BaO, SrO, MnO, CeO2, Cr2O3, Sb2O3 and B2O3. Therefore, the production cost is reduced by 30-40% through formula improvement, and the product advantage is more prominent in the scene of different thermal conductivity coefficient requirements of the glass fiber core material.

Description

Technical Field

[0001] This invention relates to the field of thermal insulation materials, specifically a low-cost thermal insulation board glass mineral wool core material. Background Technology

[0002] Vacuum insulation panels are a type of composite insulation material. They are made by using a porous material with a certain strength as the core material and a high-barrier membrane to form a bag. A vacuum is created to eliminate heat convection, and appropriate amounts of getters and desiccants are added to absorb gases released from the core material itself and those that permeate into the atmosphere during long-term use. Due to their low thermal conductivity, vacuum insulation panels are widely used in the insulation materials industry.

[0003] For example, application number 201910379024.5 discloses a glass fiber core material for vacuum insulation panels. The core material is a mesh formed from chopped glass fibers, wherein the sum of the weight percentages of K2O and Na2O in the chopped glass fibers is less than or equal to 1.3%; the average diameter of the chopped glass fibers is less than 9.5 μm; and the number of stacked layers of the mesh in the core material is more than 3 layers. This invention provides a glass fiber core material for vacuum insulation panels. By selecting appropriate raw materials, it improves the performance of the core material while minimizing production costs, giving it significant market competitiveness and revolutionary significance in the field of core materials for vacuum insulation panels.

[0004] However, regardless of whether the application requires a thermal conductivity of less than 1.8 mW / (m·k) or less than 1.3 mW / (m·k), the glass fiber core material in the authorized patent is used. This results in the high cost of vacuum insulation panels, which seriously affects the product's competitive advantage. Summary of the Invention

[0005] The purpose of this invention is to provide a low-cost mineral wool core material for heat insulation panels to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a low-cost heat insulation board glass mineral wool core material, wherein the core material is a mesh felt formed from chopped mineral wool, and the components of the core material include SiO2, Al2O3, MgO, CaO, TFe2O3, TiO2, ZrO2, Na2O, K2O, Li2O, P2O5, SO3, BaO, SrO, MnO, CeO2, Cr2O3, Sb2O3, and B2O3.

[0007] Preferably, by weight percentage, the core material comprises 41.95~47.48% SiO2, 9.32~11.58% Al2O3, 2.88~5.26% MgO, 31.64~38.70% CaO, 0.33~0.44% TFe2O3, 0.47~0.48% TiO2, 0.01~0.02% ZrO2, 0.07~0.25% Na2O, and 0.1 5~0.39% K2O, 0.01~0.03% Li2O, less than 0.05% P2O5, 0.06~0.07% SO3, 0.09~0.10% BaO, 0.05~0.10% SrO, 1.58~3.34% MnO, less than 0.01% CeO2, less than 0.03% Cr2O3, less than 0.01% Sb2O3, and 0.23~2.62% B2O3.

[0008] Preferably, glass fiber is added to the core material, and the core material is composed of mineral wool and glass fiber, wherein the proportion of mineral wool in the core material shall not be less than 15%.

[0009] Preferably, the core material consists of 40% mineral wool and 60% glass fiber.

[0010] Preferably, the core material consists of 80% mineral wool and 20% glass fiber.

[0011] Preferably, the core material consists of 50% mineral wool and 50% glass fiber.

[0012] Preferably, the chopped mineral wool is laid out in the core material in a unidirectional manner to form a layered structure; in each layer of the layered structure, the chopped mineral wool is horizontally and continuously distributed, forming a crisscrossing distribution structure.

[0013] Preferably, the hot pressing temperature of the core material is 500~800℃.

[0014] Compared with existing technologies, the beneficial effects of this invention are: through formula improvement, production costs are reduced by 30-40%, and the product advantages are more prominent when glass fiber core materials are used in different scenarios with different thermal conductivity requirements. Detailed Implementation

[0015] Example 1

[0016] This invention discloses a low-cost mineral wool core material for heat insulation panels. The core material is a mesh formed from chopped mineral wool. The mineral wool fibers are prepared by pulping, drying, molding, and vacuum sealing, using conventional vacuum heat insulation panel manufacturing processes. The chopped mineral wool is distributed horizontally in the core material, forming a layered structure. Within each layer, the chopped mineral wool is continuously distributed horizontally, forming a crisscrossing distribution structure. The hot-pressing temperature of the core material is 500~800℃. By weight percentage, the core material comprises 41.95% SiO2, 9.32% Al2O3, 5.26% MgO, 38.70% CaO, 0.44% TFe2O3, 0.48% TiO2, 0.017% ZrO2, 0.073% Na2O, 0.15% K2O, 0.013% Li2O, 0.020% P2O5, 0.069% SO3, 0.094% BaO, 0.053% SrO, 3.34% MnO, 0.0097% CeO2, 0.026% Cr2O3, 0.0039% Sb2O3, and 0.23% B2O3.

[0017] Example 2

[0018] This invention discloses a low-cost mineral wool core material for heat insulation panels. The core material is a mesh formed from chopped mineral wool. The mineral wool fibers are prepared by pulping, drying, molding, and vacuum sealing, using conventional vacuum heat insulation panel manufacturing processes. The chopped mineral wool is distributed horizontally in the core material, forming a layered structure. Within each layer, the chopped mineral wool is continuously distributed horizontally, forming a crisscrossing distribution structure. The hot-pressing temperature of the core material is 500~800℃. The core material is 100% SF cotton. By weight percentage, the core material composition includes 0.29% loss on ignition (1025℃), 11.58% AL2O3, 47.48% SiO2, 0.33% TFe2O3, 31.64% CaO, 2.88% MgO, 0.38% K2O, 0.25% Na2O, 0.47% TiO2, 0.01% ZrO2 or HfO2, 2.62% B2O3, 0.10% BaO, 0.03% Li2O, 0.02% ZnO, 0.10% SrO, 1.58% MnO, less than 0.05% P2O5, 0.16% F, 0.06% SO3, and less than 0.03% Cr2O3.

[0019] Example 3

[0020] The difference from Examples 1 and 2 is that the core material of the insulation board is prepared by using a mixture of mineral wool and glass fiber. The core material consists of 40% mineral wool and 60% glass fiber. The core material comprises 0.47% loss on ignition (1025℃), 12.10% Al₂O₃, 47.50% SiO₂, 0.18% TFe₂O₃, 27.83% CaO, 2.37% MgO, 0.26% K₂O, 0.34% Na₂O, 0.59% TiO₂, 0.04% ZrO₂ or HfO₂, 5.48% B₂O₃, 0.43% BaO, 0.07% Li₂O, 0.27% ZnO, 0.140% SrO, 1.68% MnO, less than 0.05% P₂O₅, 0.18% F, 0.25% SO₃, and less than 0.01% Cr₂O₃.

[0021] Example 4

[0022] The difference from Examples 1 and 2 is that the core material of the insulation board is prepared by using a mixture of mineral wool and glass fiber. The core material consists of 80% mineral wool and 20% glass fiber. The core material comprises 0.45% loss on ignition (1025℃), 11.57% Al2O3, 48.10% SiO2, 0.34% TFe2O3, 30.90% CaO, 2.59% MgO, 0.34% K2O, 0.25% Na2O, 0.48% TiO2, 0.01% ZrO2 or HfO2, 3.14% B2O3, 0.08% BaO, 0.03% Li2O, 0.03% ZnO, 0.11% SrO, 1.35% MnO, less than 0.05% P2O5, 0.19% F, 0.06% SO3, and less than 0.01% Cr2O3.

[0023] Example 5

[0024] The difference from Examples 1 and 2 is that the core material of the insulation board is prepared by using a mixture of mineral wool and glass fiber. The core material consists of 50% mineral wool and 50% glass fiber. The core material comprises 0.27% loss on ignition (1025℃), 12.33% Al₂O₃, 49.21% SiO₂, 0.31% TFe₂O₃, 29.80% CaO, 2.23% MgO, 0.28% K₂O, 0.25% Na₂O, 0.49% TiO₂, 0.03% ZrO₂ or HfO₂, 3.25% B₂O₃, 0.07% BaO, 0.03% Li₂O, less than 0.01% ZnO, 0.12% SrO, 1.12% MnO, less than 0.05% P₂O₅, 0.23% F, 0.05% SO₃, and less than 0.01% Cr₂O₃.

[0025] In summary, this invention, through formula improvement and the innovative use of specially formulated mineral wool, reduces production costs by 30-40%, while allowing performance to be adjusted within a controllable range, meeting the needs of scenarios with slightly lower requirements and higher raw material consumption. Furthermore, it is suitable for scenarios requiring different thermal conductivity levels compared to glass fiber core materials, further highlighting the product's advantages.

[0026] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A low-cost mineral wool core material for heat insulation panels, characterized in that: The core material is a mesh felt formed from chopped mineral wool, and the components of the core material include SiO2, Al2O3, MgO, CaO, TFe2O3, TiO2, ZrO2, Na2O, K2O, Li2O, P2O5, SO3, BaO, SrO, MnO, CeO2, Cr2O3, Sb2O3, and B2O3.

2. The low-cost heat insulation board glass mineral wool core material according to claim 1, characterized in that: By weight percentage, the core material comprises 41.95-47.48% SiO2, 9.32-11.58% Al2O3, 2.88-5.26% MgO, 31.64-38.70% CaO, 0.33-0.44% TFe2O3, 0.47-0.48% TiO2, 0.01-0.02% ZrO2, 0.07-0.25% Na2O, and 0.15- 0.39% K2O, 0.01~0.03% Li2O, less than 0.05% P2O5, 0.06~0.07% SO3, 0.09~0.10% BaO, 0.05~0.10% SrO, 1.58~3.34% MnO, less than 0.01% CeO2, less than 0.03% Cr2O3, less than 0.01% Sb2O3, and 0.23~2.62% B2O3.

3. The low-cost heat insulation board glass mineral wool core material according to claim 1, characterized in that: Glass fiber is added to the core material, which is composed of mineral wool and glass fiber, and the proportion of mineral wool in the core material shall not be less than 15%.

4. The low-cost heat insulation board glass mineral wool core material according to claim 3, characterized in that: The core material consists of 40% mineral wool and 60% glass fiber.

5. The low-cost heat insulation board glass mineral wool core material according to claim 3, characterized in that: The core material consists of 80% mineral wool and 20% glass fiber.

6. The low-cost heat insulation board glass mineral wool core material according to claim 3, characterized in that: The core material consists of 50% mineral wool and 50% glass fiber.

7. The low-cost heat insulation board glass mineral wool core material according to claim 1, characterized in that: The chopped mineral wool is laid out in the core material in a unidirectional manner to form a layered structure; in each layer of the layered structure, the chopped mineral wool is horizontally and continuously distributed, forming a crisscrossing distribution structure.

8. The low-cost heat insulation board glass mineral wool core material according to claim 1, characterized in that: The hot pressing temperature of the core material is 500~800℃.