JPS62119004A - Manufacture of mineral fiber board - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field 1] The present invention relates to a method for using a mineral fiber board in which the strength does not decrease even if the edges are subjected to finishing or groove processing.

[Background Art J] Conventionally, as shown in FIG. 8, after a slurry 1 mainly made of mineral fibers such as rock wool is filtered in a round cylinder 2, a round cylinder is placed on the surface of a wet mat 3 to be carried out. A resin liquid 4 is continuously applied and impregnated onto the net cylinder 2 by spraying or the like to obtain a papermaking original plate 5.
is cut along the resin-impregnated layer 6 and then cured to produce a mineral fiber board A'.The mineral fiber board A'' thus obtained is cut as shown in FIG. The resin-impregnated layer N6 at the end is formed only on one side, so if the cut end is grooved, for example, as shown in FIG. 10, the reinforcing effect of the resin-impregnated layer will not be sufficient ( The bending strength and compressive strength at the edges decrease, cracks occur, the groove 9 swells and becomes deformed during surface painting, and when the number of sheets stacked increases when stored, the groove 9 There was a problem in that the wet mat 3 was crushed by force.Also, the degree of resin impregnation varied depending on the thickness of the wet mat 3 and the degree of vacuum, resulting in variations in the strength of the edges, and it is necessary to prevent this variation. When the amount of resin liquid 4 applied is increased in order to form a resin impregnated N6 on the front and back surfaces of the end, the resin liquid 4 passes through the circular net silling-2 and mixes with the white water, causing starch. There were problems such as a decrease in yield and generation of bubbles.

[Objective of the Invention 1 The present invention was made in order to solve the above problem, and its purpose is to increase the amount of resin liquid applied at one time and avoid mixing the resin liquid into white water. Forming a resin-impregnated layer on the front and back surfaces of the cut end of the papermaking original plate,
It can exert a sufficient reinforcing effect, so even if the edges are processed or grooved, the bending strength and compressive strength will not decrease, and chipping at the edges can prevent the occurrence of cracks. The purpose is to manufacture mineral fiberboard.

[Disclosure of the Invention] The method for producing a mineral fiberboard of the present invention is to process a slurry 1 mainly made of mineral fibers such as rock wool into a circular mesh cylinder f-
Resin fL4 is applied to the surface of the wet mat 3 obtained by filtering with 2.
In the method for producing a mineral fiberboard, the surface side of the wet mat 3 This is characterized in that the resin A4 is also impregnated from the back side corresponding to the resin-impregnated layer 6a to form the resin-impregnated layer 6 on the front and back sides of the papermaking original plate 5, and with this configuration, the above object can be achieved. It is something that That is,
The resin liquid 4 is applied to the surface of the wet mat 3 to form a resin impregnation 716a, and then the back surface of the wet mat 3 is also impregnated with the resin wL4 to form a resin impregnated layer 6 on the front and back surfaces of the papermaking original plate 5. Therefore, the resin-impregnated N6 can be formed on the papermaking original plate 5 without impregnating a large amount of the resin liquid 4 at once, and there is no possibility that the resin liquid 4 will be mixed into white water, and stable production can be performed. Since resin impregnation/116 is formed on the front and back surfaces of the papermaking original board 5, the cut ends of the mineral fiber board A cut along the resin impregnated layer 6 are sufficiently reinforced, and therefore the ends are Even after actual machining and groove machining, the bending strength and compressive strength do not decrease.
The edges are notched to prevent cracks from occurring.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The slurry 1 in the present invention has a composition that differs depending on the type of mineral fiber board to be manufactured, and for example, 80% rock wool, 1% by weight starch, 1% aggregate such as silica, etc.
00 weight%, water repellent agent 5% by weight, and other admixture materials depending on the type, and water was added and mixed. This slurry 1 is stored in a slurry tank 7, and the slurry 1 is filtered through an immersed round net sill-2. The resin liquid 4 was continuously applied to the wet mat 3 obtained in this way from sprayers installed at predetermined intervals above the round net silling 2 in a direction perpendicular to the direction of conveyance of the wet mat 3. By impregnation, a resin-impregnated layer 6a is formed on the surface side of the wet mat 3 as shown in FIG. Any resin can be used as the resin liquid 4, but
Thermosetting resin strength 6 is preferred. Next, this wet mat 3 is carried out by a conveyor 11. At this time, a roll part 8a is placed at a predetermined interval on the back side of the 9-metal mat 3 so as to correspond to the resin-impregnated layer 6a of the original paper sheet 5 in a direction perpendicular to the conveyance direction of the original sheet sheet 5 below the conveyor 11. A papermaking process in which a resin liquid 4 is impregnated with a backer roll 8 placed on the floor to form a resin-impregnated layer 65, and then the wet mat 3 is adjusted to a predetermined moisture content using a suction belt or the like to form a resin-impregnated layer 6 covering the front and back surfaces. Obtain original plate 4.

The roll portion 8a of the backer roll 8 is shaped like a low left to ensure a sufficient amount of coating.

This original paperboard 5 is cut along the resin-impregnated line M6a, and then, for example, the original paperboard 5 is cured under moist heat at 80° C. to obtain a mineral fiber board A having a water content of 10% and reinforced at the edges. This mineral fiber board A is grooved on the ground to form a joint groove 9 as shown in Figure plS6, and is used as a canopy, valve board, etc., with no chips or cracks occurring at the edges. By the way,
Example using polyacrylamide tree T as resin liquid 4 (
Regarding Example 1) and the example using melamine resin (Example 2), insert the lower 7 run part of the type 1 measuring tool 10 into the groove 9 after the groove processing as shown in Fig. 7. Then, the strength of the front side ((a) of the same figure) and the strength of the back side ((b) of the same figure) when a load is applied from the upper 7 run part are measured in the normal state and in the moisture absorption state (moisture absorption condition knee 30℃, 90% R1 For comparison, the strength of the groove was similarly measured for an example in which a resin-impregnated layer was formed on only one side by the conventional method using polyacrylamide as the resin liquid ( Comparative Example) The sample was 100X 150X 151.

The results are shown in Table 1.

Front side strength (kg) Back side strength (kg) Normal state
? Example 1 32 14 39 19 The strength of the example of the present invention was 1.5 to 1.5% higher than that of the comparative example.
It is twice as large.

[Effect of the invention 1] In the present invention, a resin liquid is applied to the surface of the wet mat to form an O (fat-impregnated layer), and then the resin liquid is impregnated from the back side of the wet mat to be exposed on the papermaking original plate. Since a wood Nt-impregnated layer is formed on the back side, a resin-impregnated layer can be formed on the original paper sheet without impregnating a large amount of resin liquid at once, and the resin liquid will not mix with the white water, making it possible to form mineral fiber boards stably. Moreover, due to the resin-impregnated layer covering the front and back surfaces of the original paper sheet, the cut ends of the mineral fiberboard formed by cutting along this resin-impregnated layer are sufficiently reinforced,
Therefore, even if the end portions are subjected to actual machining or groove machining, the bending strength and compressive strength will not decrease, and the occurrence of cracks at the end portions can be prevented.

[Brief explanation of drawings]

Figure 1 is a schematic diagram showing an example of an apparatus for carrying out an embodiment of the present invention, Figure #s2 is a plan view showing a backer roll in the same apparatus, and Figure 3 is a wet mat surface in the same embodiment. Fig. 4 is a sectional view showing a state in which the back side of the wet mat is impregnated with resin liquid in the same example as above, and Fig. 5 is a paper fabrication obtained by the above method. Figure 6 is a cross-sectional view showing the original plate, Figure 6 is a cross-sectional view showing the grooved mineral fiberboard obtained as above, and Figure 7 (,) (b) is a cross-sectional view of the grooved mineral fiberboard obtained as above. FIG. 9 is a cross-sectional view showing a method for measuring the strength of a groove, and FIG.
The figure is a cross-sectional view showing the mineral fiber 4I plate obtained as above, No. 10
The figure is a cross-sectional view showing the same mineral N & fiber joint board grooved state as above, where A is a mineral fiber board, 1 is a slurry, 2 is a circular mesh cylinder, 3 is a wet mat, 4 is a resin liquid, and 5 6.6a and 6b are resin-impregnated layers. Agent Patent Attorney Ishi 1) Chief 7 Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 @ Figure 8 Figure 10 Procedural amendment (voluntary) 1. Indication of the case 1985 Patent order No. 259597 No. 2, Name of the invention Method for manufacturing mineral fiberboard 3, Relationship with the case of the person making the amendment Patent applicant address 1048 Kadoma, Kadoma City, Osaka Prefecture Name (58
3) Matsushita Electric Works Co., Ltd. Representative Sadao Fujii 4, Agent postal code 530 5, Date of amendment order 6, Number of inventions increased by amendment None 1) Specification 1i
We will amend the scope of patent claims on page as follows. [(1) The surface of a wet mat obtained by filtering a slurry mainly made of mineral fibers such as rock wool through a circular mesh cylinder is coated with a resin solution continuously to obtain a papermaking original plate. In the manufacturing method of mineral fiberboard, which consists of cutting the original sheet along the resin-impregnated layer, and then (1), the resin liquid is also impregnated from the back side corresponding to the resin-impregnated layer on the front side of the wet mat to form paper. A method for manufacturing a mineral AM board, which is characterized by forming a resin-impregnated layer on the front and back surfaces of the original board.'' 2) In the 8th line of page 2, ``Curing'' is deleted and ``Drying'' is inserted. . 3) Change “5% by weight” in the 7th line of page 5 of the above to “0.5 weight 1
%” will be corrected. 4) " from the 6th true line 12th line to the 7th fx line 13th"
For example, delete "...to close" and insert "dry".

Claims (1)

[Claims] (1) The surface of a wet mat obtained by filtering a slurry mainly made of mineral fibers such as rock wool through a circular mesh cylinder is continuously coated and impregnated with a resin solution to obtain a papermaking original plate. In the manufacturing method of mineral fiberboard, which involves cutting along the resin-impregnated layer and then curing it, the wet mat is also impregnated with a resin liquid from the back side corresponding to the resin-impregnated layer on the front side to form the original paper sheet. A method for producing a mineral fiberboard, characterized by forming a resin-impregnated layer on both front and back surfaces.