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CN-122013902-A - High-strength heat-preservation rock wool building board and preparation method thereof

CN122013902ACN 122013902 ACN122013902 ACN 122013902ACN-122013902-A

Abstract

The invention discloses a high-strength heat-preservation rock wool building board and a preparation method thereof, and relates to the technical field of building engineering. According to the invention, the flexible buffer strips with the same length as rock wool fibers are arranged in the rock wool board matrix and are integrally pressed and formed, the alkali-resistant polypropylene grid films are compounded on the front side and the back side of the matrix, the dry hanging pieces which can be mechanically locked and fixed with the grid films and provided with the adjusting structures are embedded in the matrix, the annular buffer gaskets are arranged at the embedded ends of the hanging pieces in a matched mode, the inorganic heat insulation gaskets are arranged at the contact surfaces of the hanging pieces, the plates and the external keels, and the avoidance arrangement structure of the embedded points of the flexible buffer strips and the dry hanging pieces is optimized, so that the technical problems that the traditional rock wool building board is insufficient in dry hanging anchoring force, easy to peel between layers, easy to crack and fall under stress, poor in installation and adjustment suitability and large in cold-hot bridge loss can be solved.

Inventors

  • YU JIASHENG
  • QIU XIN
  • LI SONG

Assignees

  • 江苏罗科雷森建筑材料科技有限公司

Dates

Publication Date
20260512
Application Date
20260323

Claims (10)

  1. 1. The high-strength heat-preservation rock wool building board is characterized by comprising a rock wool board substrate, flexible buffer strips, an alkali-resistant polypropylene grid film, dry hanging pieces, an annular buffer gasket and an inorganic heat-insulation gasket; The rock wool board substrate is an energy-saving heat-preserving heat-insulating substrate for an outer wall of a building, the dry density is 140kg/m 3 ～160kg/m 3 , and the rock wool board substrate is formed by solidifying and pressing rock wool fibers through a bio-based inorganic composite binder; flexible buffer strips are distributed in the rock wool board matrix at equal intervals along the horizontal direction, the center distance between adjacent flexible buffer strips is 180 mm-220 mm, the width of each flexible buffer strip is 8 mm-12 mm, the thickness of each flexible buffer strip is consistent with that of the rock wool board matrix, and the flexible buffer strips and rock wool fibers of the rock wool board matrix are synchronously paved and integrally pressed; The front and the back of the rock wool board substrate are respectively compounded with an alkali-resistant polypropylene grid film, and the thickness of the alkali-resistant polypropylene grid film is 0.15 mm-0.25 mm; 4 groups of dry hanging pieces are embedded in the rock wool board substrate in advance, the 4 groups of dry hanging pieces are in rectangular distribution of 380 mm-420 mm multiplied by 380 mm-420 mm, the dry hanging pieces are of an L-shaped structure, the embedded ends of the long sides of the dry hanging pieces are inserted into the rock wool board substrate, the roots of the embedded ends penetrate through an alkali-resistant polypropylene grid film on one side of a mounting surface and are mechanically locked and fixed with the alkali-resistant polypropylene grid film on the side through a flanging structure, and the embedded depth of the dry hanging pieces is 1/3-1/2 of the thickness of the rock wool board substrate; the end part of the embedded end is provided with a barb anchoring structure which forms reinforced anchoring with the internal fiber of the rock wool board matrix, the short side is an exposed installation end, a slotted hole adjusting structure is arranged, the slotted hole is arranged along the horizontal direction, and the adjusting stroke is 12 mm-18 mm; The root of the embedded end of the dry hanging piece is sleeved with an annular buffer gasket, the material of the annular buffer gasket is consistent with that of the flexible buffer strip, the thickness of the annular buffer gasket is 4 mm-6 mm, and the diameter of the annular buffer gasket is 25 mm-35 mm; the contact surface of the dry hanging piece and the rock wool board substrate is provided with an inorganic heat insulation gasket, the connection surface of the dry hanging piece and the external installation keel is provided with an inorganic heat insulation gasket with the same specification in a matching way, and the thickness of the inorganic heat insulation gasket is 3mm; the arrangement positions of the flexible buffer strips and the embedded positions of the dry hanging pieces are mutually avoided, and the distance between the embedded points of the dry hanging pieces and the edges of the flexible buffer strips is 50 mm-100 mm.
  2. 2. The high-strength heat-insulation rock wool building board according to claim 1, wherein the flexible buffer strip is made of basalt fiber needled felt.
  3. 3. The high-strength heat-insulation rock wool building board of claim 1, wherein the dry hanging piece is made of 316 stainless steel.
  4. 4. The high-strength heat-preservation rock wool building board is characterized in that the rock wool fiber is prepared from the following raw materials, by mass, 100 parts of basalt 50-58 parts, blast furnace slag 15-22 parts, stainless steel steelmaking tailings 8-12 parts, red mud 2-4 parts, borax 1-3 parts and fluxing auxiliary materials in balance.
  5. 5. A method for preparing a high-strength heat-insulating rock wool building board, which is suitable for preparing the high-strength heat-insulating rock wool building board according to any one of claims 1 to 4, and comprises the following steps: S1, raw material pretreatment and melt fiber forming, namely weighing rock wool fiber raw materials according to a proportion, grinding until 200 meshes of screen residue is less than or equal to 5%, pre-sintering for 15-25 min at 800-900 ℃ after mixing and homogenizing, then melting for 30-40 min at 1440-1460 ℃, controlling the temperature of a melt outlet at 1420-1440 ℃, and preparing the rock wool fiber through a four-stage centrifugal fiber forming machine; S2, pretreatment of the flexible buffer strip and felt paving are compounded, wherein the flexible buffer strip is roughened by atmospheric pressure jet plasma equipment, and the surface roughness Ra of the treated flexible buffer strip is 2.0-3.0 mu m; in the rock wool fiber felting process, paving a flexible buffer strip with a through length along the horizontal direction at intervals of 180 mm-220 mm, and synchronously finishing felting of the rock wool fibers and the flexible buffer strip to form a rock wool felt matrix; s3, pre-paving the grid films, namely pre-paving an alkali-resistant polypropylene grid film on the upper surface and the lower surface of the rock wool felt matrix respectively; S4, adhesive dipping and vacuum photoresist removal, namely dipping the rock wool felt substrate after the pre-grid membrane paving into a biological base inorganic composite adhesive, performing double-roller dipping treatment, and performing vacuum photoresist removal treatment after dipping; The bio-based inorganic composite binder is prepared from enzymatic hydrolysis lignin-based biological resin, potassium silicate solution with the modulus of 3.8-4.2, nano silicon dioxide sol, a curing accelerator and deionized water, wherein the solid content of the binder is 40% -50%, and the viscosity at 25 ℃ is 150mPa, s-200 mPa and s; s5, positioning and mounting the pre-inserts, namely positioning dry hanging pieces on the impregnated rock wool felt substrate according to rectangular distribution of 380 mm-420 mm multiplied by 380 mm-420 mm, wherein the distance between the embedded points of the dry hanging pieces and the edges of the flexible buffer strips is 50 mm-100 mm; the dry hanging piece vertically penetrates through the alkali-resistant polypropylene grid film on one side of the rock wool felt substrate mounting surface, an annular buffer gasket is sleeved at the root of the embedded end, the gasket is attached between the grid film and the short side of the hanging piece, the gasket is inserted to a preset embedded depth, and the gasket and the alkali-resistant polypropylene grid film on the side are mechanically locked and fixed through a root flanging structure; an inorganic heat insulation gasket is arranged on the contact surface of the dry hanging piece and the rock wool felt substrate in a cushioning manner; S6, sectional temperature-pressure cooperative curing molding, namely, feeding the rock wool felt substrate subjected to positioning into a curing furnace with pressure, and performing four-section curing treatment, wherein the temperature of a pre-curing section is 105-115 ℃, the pressure is 0.12-0.18 MPa, and the constant temperature and pressure are 12-18 min; The temperature of the main curing section is 175-185 ℃, the pressure is 0.22-0.28 MPa, and the temperature and pressure are constant for 25-35 min; the temperature of the post-curing section is 145-155 ℃, the pressure is 0.18-0.22 MPa, and the temperature and pressure are constant for 15-25 min; The temperature reduction section reduces the temperature from 145-155 ℃ to 55-65 ℃ at a linear temperature reduction rate of 1.5-2.5 ℃ per minute, the pressure synchronously and linearly reduces to normal pressure, and then the rock wool board blank is naturally cooled to room temperature; S7, cutting the rock wool board blank to a target specification through fixed thickness rolling and calendaring, and checking the finished product to obtain the finished product of the high-strength heat-insulation rock wool building board.
  6. 6. The preparation method of the high-strength heat-preservation rock wool building plate is characterized in that the rotation speed of a centrifugal fiberizer four-stage roller is 2800-3200 r/min, 4300-4700 r/min, 5800 r/min-6200 r/min and 7000 r/min-7400 r/min in sequence, the melt flow is controlled to be 1.5-2.0 t/h, the fiberizing wind temperature is 350-380 ℃ and the wind pressure is 6 kPa-8 kPa.
  7. 7. The preparation method of the high-strength heat-preservation rock wool building board is characterized in that the roughening treatment parameters of plasma equipment are 180-220W in power, 4-6L/min in argon flow, 8-12 mm in distance between a nozzle and the surface of a buffer strip, and 25-35 s in treatment time.
  8. 8. The method for preparing the high-strength heat-preservation rock wool building board according to claim 5, wherein the double-roller dipping pressure is 0.1-0.2 MPa, 0.25-0.35 MPa in sequence, the core layer vacuum degree of the vacuum photoresist removing treatment is-0.10-0.08 MPa, and the surface layer vacuum degree is-0.07-0.05 MPa.
  9. 9. The method for preparing a high-strength heat-insulating rock wool building board according to claim 5, wherein the curing accelerator of the bio-based inorganic composite binder is 2-ethyl-4-methylimidazole.
  10. 10. The method for preparing the high-strength heat-preservation rock wool building board is characterized in that the roller pressure of the fixed-thickness roller is 0.3-0.5 MPa, the linear speed is 8-10 m/min, and the fixed-thickness tolerance is controlled to be +/-0.5 mm.

Description

High-strength heat-preservation rock wool building board and preparation method thereof Technical Field The invention relates to the technical field of constructional engineering, in particular to a high-strength heat-preservation rock wool building board and a preparation method thereof. Background The high-strength heat-insulating rock wool building board provides high-efficiency heat insulation for the building enclosure structure, greatly reduces energy consumption of building heating and refrigeration, realizes energy conservation and consumption reduction, stabilizes indoor temperature and humidity, builds a fireproof barrier, effectively blocks fire spreading, improves fire safety of the building, can also enhance shock resistance, wind pressure resistance and deformation resistance of the enclosure structure, has excellent sound insulation and noise reduction, dampproofing and corrosion resistance effects, can prolong the service life of the building enclosure system, and is suitable for application in multi-scene building heat insulation engineering. In the prior art, for the high-strength heat-preservation rock wool building board and the preparation method thereof, the problems of poor structural integrity of the board, insufficient dry-hanging anchoring force, easy delamination between layers, easy cracking and falling under stress, poor on-site installation adjustment adaptability and large loss of a cold-hot bridge at the connecting part of the metal hanging piece are commonly existed, the preparation process also has the defects of low bonding strength of a fiber and an adhesive interface, large curing forming internal stress and insufficient consistency of dimensional stability and batch performance of the board, meanwhile, the traditional rock wool board production has high dependence on original mineral resources, poor high-temperature and aging resistance of an organic adhesive, rapid decay of heat preservation performance in the long-term use process, and the use safety, structural durability and energy-saving heat preservation effect of the rock wool building board are seriously affected, and the high-standard application requirements of an assembled building external wall dry-hanging heat preservation system cannot be adapted. Based on the above, the invention provides a high-strength heat-preservation rock wool building board and a preparation method thereof. Disclosure of Invention The invention aims to provide a high-strength heat-insulating rock wool building board and a preparation method thereof, wherein a composite structure of a rock wool board substrate, flexible buffer strips, an alkali-resistant polypropylene grid film, a pre-embedded dry hanging piece and a matched buffer heat-insulating gasket is integrally designed, a rock wool fiber formula of multicomponent industrial solid waste compatibility and a bio-based inorganic composite binder system are optimized, a complete-flow precise pipe control preparation process from raw material fiber forming to sectional warm-pressing curing forming is matched, the cooperative promotion of heat insulation, structural bearing, deformation buffering, installation adaptation and fireproof durability of boards is realized, the pain points of various industries of the traditional rock wool board are effectively solved, and the use requirements of energy conservation, heat insulation and assembly type dry hanging installation of building external walls can be fully met. The technical scheme adopted by the invention is that the high-strength heat-preservation rock wool building board is characterized by comprising a rock wool board substrate, flexible buffer strips, an alkali-resistant polypropylene grid film, a dry hanging piece, an annular buffer gasket and an inorganic heat-insulation gasket; The rock wool board substrate is an energy-saving heat-preserving heat-insulating substrate for an outer wall of a building, the dry density is 140kg/m 3～160kg/m3, and the rock wool board substrate is formed by solidifying and pressing rock wool fibers through a bio-based inorganic composite binder; flexible buffer strips are distributed in the rock wool board matrix at equal intervals along the horizontal direction, the center distance between adjacent flexible buffer strips is 180 mm-220 mm, the width of each flexible buffer strip is 8 mm-12 mm, the thickness of each flexible buffer strip is consistent with that of the rock wool board matrix, and the flexible buffer strips and rock wool fibers of the rock wool board matrix are synchronously paved and integrally pressed; The front and the back of the rock wool board substrate are respectively compounded with an alkali-resistant polypropylene grid film, and the thickness of the alkali-resistant polypropylene grid film is 0.15 mm-0.25 mm; 4 groups of dry hanging pieces are embedded in the rock wool board substrate in advance, the 4 groups of dry hanging pieces are in rectangular distribution of 380 m