阅读说明：本技术 一种编织纤维骨架支撑的多层芯材及制备的真空绝热板 (Multilayer core material supported by woven fiber framework and vacuum insulation panel prepared by multilayer core material ) 是由 徐滕州 陈舟 章海侠 于 2019-09-15 设计创作，主要内容包括：本发明提供了一种编织纤维骨架支撑的多层芯材及制备的真空绝热板,采用了编织立体结构作为骨架,骨架上表面下表面具有一层纤维毡,通过设置这种编织纤维为骨架支撑的多层芯材制备的真空绝热板,增加了真空绝热板的抗压性能,提高了真空绝热板的寿命。同时,通过设置一层环氧改性有机硅树脂涂层,提高了真空绝热板的隔热、耐高温性能,保证了整体的保温性能的稳定性。(The invention provides a multi-layer core material supported by a woven fiber framework and a vacuum insulation panel prepared by the multi-layer core material, wherein a woven three-dimensional structure is adopted as the framework, a layer of fiber felt is arranged on the lower surface of the upper surface of the framework, and the vacuum insulation panel prepared by the multi-layer core material supported by the woven fiber framework increases the compression resistance of the vacuum insulation panel and prolongs the service life of the vacuum insulation panel. Meanwhile, the epoxy modified organic silicon resin coating is arranged, so that the heat insulation and high temperature resistance of the vacuum heat insulation plate are improved, and the stability of the overall heat insulation performance is ensured.)

1. The utility model provides a vacuum insulation panel of multilayer core and preparation that woven fiber skeleton supported which characterized in that: the drying agent-coated vacuum film comprises a core material (1), a drying agent (2) and a vacuum film material (3), wherein the core material (1) and the drying agent (2) are fixedly arranged inside the vacuum film material (3), and the vacuum film material (3) is a film material structure which is coated on the core material (1) and then is subjected to vacuum-pumping treatment by a vacuum machine; the core material (1) is composed of a middle framework structure (4), an upper layer fiber felt (5) and a lower layer fiber felt (6), the framework structure (4) is a three-dimensional woven structure of flame cotton fibers and glass fibers, and the fibers on one sides, close to the vacuum membrane material (3), of the upper layer fiber felt (5) and the lower layer fiber felt (6) are plastically deformed by 2-6.5% of volume fraction.

2. The woven fiber framework supported multi-layer core material and the prepared vacuum insulation panel according to claim 1 are characterized in that: in the framework structure (4), the flame cotton fiber accounts for 10-25% of the framework structure (4) by weight, wherein the height of the woven structure is 1-150 microns.

3. The woven fiber framework supported multi-layer core material and the prepared vacuum insulation panel according to claim 1 are characterized in that: the upper layer fiber felt (5) and the lower layer fiber felt (6) are both provided with centrifugal cotton fibers with the diameter of 10-150 mu m and silicon dioxide fibers with the diameter of 20-100 mu m, the two fibers are bonded together through a binder, and divalent inorganic salt electrolyte solid particles are doped in the middle.

4. The woven fiber framework supported multi-layer core material and the prepared vacuum insulation panel according to claim 1 are characterized in that: the drying agent (2) is an alkaline drying agent.

5. The woven fiber framework supported multi-layer core material and the prepared vacuum insulation panel according to claim 1 are characterized in that: the vacuum film material (3) is a composite film material, and one side of the composite film material, which is adjacent to the core material (1), is coated or sprayed with an epoxy modified organic silicon resin coating (7) with the thickness of 1-50 mu m.

Technical Field

The invention belongs to the field of vacuum heat-insulating materials, and particularly relates to a multilayer core material supported by a woven fiber framework and a vacuum heat-insulating plate prepared by the multilayer core material.

Background

The vacuum insulation panel is an efficient energy-saving material obtained by placing a core material and an air suction material into a barrier bag for packaging, wherein the core material is a support body in the vacuum insulation panel, generally, porous medium materials such as aerogel, foamed polyurethane, silicon dioxide powder, asbestos fiber, glass fiber and the like are selected, and meanwhile, the core material becomes a key for determining whether the vacuum insulation panel can be kept in an original state for long-term service after air leakage.

At present, the heat conductivity coefficient of the vacuum heat insulation plate prepared by the core material can be 2-4kw/m.k, and the application field of the vacuum heat insulation plate is expanded to various industries such as household appliances, cold chain transportation, building external wall heat insulation and the like due to good heat insulation performance of the vacuum heat insulation plate, and further requirements are provided for the structure and the performance of the vacuum heat insulation plate along with the expansion of the application range.

Disclosure of Invention

In order to enlarge the application field of the vacuum insulation panel more, the invention adds the woven fiber as the framework of the core material on the basis of the common core material, enhances the mechanical property and ensures the heat preservation property, thereby providing the multilayer core material supported by the woven fiber framework and the prepared vacuum insulation panel, which comprise the core material, the drying agent and the vacuum membrane material, wherein the core material and the drying agent are fixedly arranged in the vacuum membrane material, and the vacuum membrane material is vacuumized by a vacuum machine; the core material is composed of a middle framework structure, an upper layer fiber felt and a lower layer fiber felt, the framework structure is a three-dimensional woven structure of flame cotton fibers and glass fibers, and the fibers on one sides, close to the vacuum membrane material, of the upper layer fiber felt and the lower layer fiber felt are plastically deformed by the volume fraction of 2-6.5%.

As an improvement, in the framework structure, the flame cotton fiber accounts for 10-25% of the framework structure by weight, wherein the height of the woven structure is 1-150 microns

As an improvement, the upper layer fiber felt and the lower layer fiber felt are both provided with centrifugal cotton fibers with the diameter of 10-150 mu m and silicon dioxide fibers with the diameter of 20-100 mu m, the two fibers are bonded together through a binder, and divalent inorganic salt electrolyte solid particles are doped in the middle.

As a refinement, the desiccant is an alkaline desiccant.

As an improvement, the vacuum film material is a composite film material, and one side of the composite film material, which is adjacent to the core material, is coated or sprayed with an epoxy modified organic silicon resin coating with the thickness of 1-50 mu m.

Has the advantages that: according to the multilayer core material supported by the woven fiber framework and the vacuum insulation panel prepared by the multilayer core material supported by the woven fiber framework, the woven three-dimensional structure is adopted as the framework, the layer of fiber felt is arranged on the lower surface of the upper surface of the framework, and the vacuum insulation panel prepared by the multilayer core material supported by the woven fiber framework is arranged, so that the compression resistance of the vacuum insulation panel is improved, and the service life of the panel is prolonged. Meanwhile, the epoxy modified organic silicon resin coating is arranged, so that the heat insulation and high temperature resistance of the vacuum heat insulation plate are improved, and the stability of the overall heat insulation performance is ensured.

Drawings

Fig. 1 is a schematic cross-sectional view of a vacuum insulation panel according to the present invention.

Fig. 2 is a schematic structural view of the vacuum insulation panel of the present invention.

In the drawings: 1. a core material; 2. a desiccant; 3. vacuum membrane material; 4. a framework structure; 5. an upper layer of fiber mat; 6. a lower layer of fiber mat; 7. epoxy modified silicone resin coating.

Detailed Description

The figures of the present invention are further described below in conjunction with the embodiments.

The multilayer core material supported by the woven fiber framework and the prepared vacuum insulation panel comprise a core material 1, a drying agent 2 and a vacuum film material 3, wherein the core material 1 and the drying agent 2 are fixedly arranged at the part 3 of the vacuum film material, and the vacuum pumping treatment is carried out in the vacuum film material 3 through a vacuum machine; the core material 1 is composed of a middle framework structure 4, an upper layer fiber felt 5 and a lower layer fiber felt 6, the framework structure 4 is a three-dimensional woven structure of flame cotton fibers and glass fibers, and the fibers on one sides, close to the vacuum membrane material 3, of the upper layer fiber felt 5 and the lower layer fiber felt 6 are plastically deformed with the volume fraction of 2-6.5%.

In the framework structure 4, the flame cotton fiber accounts for 10-25% of the framework structure 4 by weight, the height of the woven structure is 1-150 micrometers, the woven three-dimensional structure can support the core material, the compression resistance and tensile mechanical properties of the prepared vacuum insulation panel are enhanced, the service life of the vacuum insulation panel is prolonged, and the use field is enlarged.

The upper layer fiber felt 5 and the lower layer fiber felt 6 are both set as follows: centrifugal cotton fiber with the diameter of 10-150 mu m and silicon dioxide fiber with the diameter of 20-100 mu m, wherein the two fibers are bonded together through a binder, and divalent inorganic salt electrolyte solid particles are doped in the middle. As a specific embodiment of the invention, the divalent inorganic salt electrolyte solid particles account for 0.1-12.5% of the total mass of the fiber felt, wherein the divalent inorganic salt electrolyte is selected from calcium chloride, magnesium sulfate, calcium nitrate and magnesium nitrate, and after the electrolyte solid particles are adopted, the pore diameter of the core material can be obviously reduced, and when the pressure in the vacuum heat-insulating plate is increased, the gas convection is reduced, so that the service life of the vacuum heat-insulating plate is effectively prolonged.

The drying agent 2 is an alkaline drying agent, and may be selected from, for example, calcium oxide, a montmorillonite drying agent, and an oxide drying agent containing metallic zirconium, and can effectively absorb a small amount of moisture to dry the interior of the core material.

The vacuum membrane material 3 is a composite membrane material, and one side membrane material of the composite membrane material, which is adjacent to the core material 1, is coated or sprayed with an epoxy modified organic silicon resin coating 7 with the thickness of 1-50 mu m, so that the heat resistance of the vacuum heat-insulating plate is effectively improved.