MODIFIED CALCIUM SILICATE BOARD AND SURFACE TREATMENT METHOD AND APPLICATION THEREOF

Abstract

The present disclosure discloses a modified calcium silicate board, and belongs to the technical field of floors and decorative boards. A modification method comprises steps of: dipping a calcium silicate board in a silicon dioxide solution with a solid content of 95% or more, completely absorbing the silicon dioxide solution until the calcium silicate board is saturated, and drying the dipped calcium silicate board; and carrying out sizing hardening on any surface of the modified calcium silicate board to obtain the calcium silicate board, so as to enable the triamine impregnated paper to be directly laminated with the calcium silicate board in a hot-pressing manner, and enable the surface bonding strength to reach 1 MPa; wood veneers, fireproof plates and other materials are subjected to coldbonding, the peeling strength of the product meets the requirements, and the practicability of the calcium silicate board is effectively improved.

Claims

1. A modified calcium silicate board, wherein a modification method comprises steps of: dipping a calcium silicate board in a silicon dioxide solution with a solid content of 95% or more, completely absorbing the silicon dioxide solution until the calcium silicate board is saturated, and drying the dipped calcium silicate board.

2. A surface treatment method of a modified calcium silicate board, comprising: carrying out sizing hardening on any surface of the modified calcium silicate board according to claim 1, wherein the sizing hardening comprises gluing, leveling and penetration, drying, cooling and polishing.

3. The surface treatment method of the modified calcium silicate board according to claim 2, wherein the sizing hardening particularly comprises: (1) a first sizing: a primary gluing, a primary leveling and penetration, a primary drying, a primary cooling and a primary polishing; and (2) a second sizing carried out on the first sized surface: a secondary gluing, a second drying and a second polishing.

4. The surface treatment method of the modified calcium silicate board according to claim 3, wherein an amount of glue applied for the primary gluing in the first sizing is: when the modified calcium silicate board has a board density of 900 to 950 kg/m.sup.3, the amount of glue is 110 to 120 g/m.sup.2; when the modified calcium silicate board has a board density of 950 to 1100 kg/m.sup.3, the amount of glue is 90 to 100 g/m.sup.2; when the modified calcium silicate board has a board density of 1100 to 1300 kg/m.sup.3, the amount of glue is 75 to 85 g/m.sup.2; the primary gluing adopts a waterborne two-component epoxy glue with better applicability to the calcium silicate board; the primary drying enters a drying tunnel at a speed of 10 to 12 m/min, and the drying tunnel is set at a temperature of 130 to 150° C., with a length of 10 to 15 m.

5. The surface treatment method of the modified calcium silicate board according to claim 3, wherein an amount of glue for the secondary gluing is 40 to 50 g/m.sup.2.

6. The surface treatment method of the modified calcium silicate board according to claim 3, wherein the secondary drying enters a drying tunnel at a speed of 8 to 10 m/min, the drying tunnel is set at a temperature of 130 to 150° C., and the drying tunnel has a length of 10 to 15 m.

7. The surface treatment method of the modified calcium silicate board according to claim 3, wherein the secondary gluing adopts a waterborne acrylic glue and a curing agent isocyanate, and a weight ratio of the waterborne acrylic glue to the isocyanate is 3.5 to 10:1.

8. The surface treatment method of the modified calcium silicate board according to claim 7, wherein the weight ratio of the waterborne acrylic glue to the isocyanate is 6 to 7:1.

9. A modified calcium silicate board composite material, comprising the modified calcium silicate board after surface treatment according to claim 2, and a surface material pasted on any surface of the calcium silicate board.

10. The composite material according to claim 9, wherein the surface material comprises triamine impregnated paper, wood veneers and fireproof plates, and a method for attaching the surface material comprises high-temperature hot pressing and cold pressing.

Description

DETAILED DESCRIPTION OF THE EMBODIMENTS

Example 1

[0023] A modified calcium silicate board was obtained by a modification method comprising steps of: dipping a calcium silicate board in a silicon dioxide solution with a solid content of 95% or more, completely absorbing the silicon dioxide solution until the calcium silicate board is saturated, and drying the dipped calcium silicate board.

[0024] Internal binding forces of the calcium silicate board prior to modification and the modified calcium silicate board were tested, respectively, where the internal binding force of the calcium silicate board prior to modification was 40 kg/f, and that of the modified calcium silicate board was 70 kg/f.

Example 2

[0025] The modified calcium silicate board in example 1 was subjected to surface treatment, that is, sizing hardening was performed on any surface of the modified calcium silicate board:

[0026] (1) A first sizing included a primary gluing, a primary leveling and penetration, a primary drying, a primary cooling and a primary polishing, where an amount of glue applied for the primary gluing in the first sizing was 120 g/m.sup.2 when the modified calcium silicate board had a board density of 910 kg/m.sup.3, the primary gluing adopted a waterborne two-component epoxy glue, the primary drying entered a drying tunnel at a speed of 10 to 12 m/min, and the drying tunnel was set at a temperature of 130 to 150° C., with a length of 10 to 15 m.

[0027] (2) A second sizing carried out on the first sized surface included a secondary gluing, a second drying and a second polishing, where an amount of glue applied for the secondary gluing was 40 g/m.sup.2, the secondary drying entered a drying tunnel at a speed of 8 m/min, and the drying tunnel was set at a temperature of 150° C., with a length of 10 m. The secondary gluing adopts a waterborne acrylic glue and a curing agent isocyanate, where a weight ratio of the waterborne acrylic adhesive to the isocyanate is 3.5 to 1.

Examples 3-7

[0028] The specific method for surface treatment of the modified calcium silicate board was the same as in Example 2, and the specific parameter control of the first sizing and the second sizing was shown in Table 1.

TABLE-US-00001 TABLE 1 A first sizing Density Speed of Temper- of the entering ature Length modified Amount drying of drying of drying calcium of glue tunnel tunnel tunnel silicate (g/m.sup.2) (m/min) (° C.) (M) Example 910 120 10 150 10 2 Example 950 110 10 150 10 3 Example 1000 100 11 140 12 4 Example 1100 90 11 140 12 5 Example 1200 85 12 130 15 6 Example 1300 75 12 130 15 7 A second sizing Speed of Temper- Length water- entering ature of borne Amount drying of drying drying acrylic of glue tunnel tunnel tunnel glue: (g/m.sup.2) (m/min) (° C.) (M) isocyanate Example 40 8 150 10 3.5 2 Example 40 8 150 10 6 3 Example 45 9 140 12 6 4 Example 45 9 140 12 7 5 Example 50 10 130 15 7 6 Example 50 10 130 15 10 7

Examples 8-16

[0029] The surface material was attached to the calcium silicate board after surface treatment in the above Examples 2-7, and the peel strength of the final product was tested, as shown in Table 2.

TABLE-US-00002 TABLE 2 Calcium Peel silicate Surface Attaching strength board material method (Mpa) Example Example 1 triamine High Not 8 impregnated temperature adhere paper and firmly hot pressing (a single surface) Example Example 2 triamine High 1 9 impregnated temperature paper and hot pressing (a single surface) Example Example 3 triamine High 1.2 10 impregnated temperature paper and hot pressing (a single surface) Example Example 1 wood veneers Cold pressing 0.4 11 (with Pur glue) (dual-surface) Example Example 4 wood veneers Cold pressing 1.4 12 (with Pur glue) (dual-surface) Example Example 5 wood veneers Cold pressing 1.7 13 (dual-surface) Example Example 1 fireproof plates Cold pressing (a 0.5 14 (with Pur glue) single surface) Example Example 6 fireproof plates Cold pressing (a 1.1 15 (with Pur glue) single surface) Example Example 7 fireproof plates Cold pressing (a 1.6 16 (with Pur glue) single surface)