Compound gridding rib layer product with surface protecting paper and preparation method thereof

Abstract

The invention discloses a compound gridding rib layer product with a piece of surface protecting paper and a preparation method thereof. The compound gridding rib layer product comprises a compound gridding rib layer and the piece of surface protecting paper, wherein the compound gridding rib layer comprises layers of fiber glass meshes; each layer of the fiber glass mesh is bonded by a sizing agent; the fiber glass meshes are compounded to form the compound gridding rib layer in a stacking manner; the compound gridding rib layer and the surface protecting paper are bonded in the stacking manner. The invention aims to overcome the defects in the prior art, and provides the compound gridding rib layer product with the piece of surface protecting paper, which is high in mechanical strength and uniform in rib distribution, and the preparation method thereof.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a grid cloth, a face-protecting paper and a preparation method thereof for manufacturing gypsum boards. Background technique [0002] As we all know, the paper-faced gypsum board is a board composed of dihydrate gypsum as the core and protective paper as the surface layer. The gypsum core and the protective paper are firmly bonded together. The protective paper plays the role of bearing tension and reinforcement. The protective paper layer has a great influence on the quality of the board, and the board that is not firmly pasted with the protective paper cannot be used. Paper-faced gypsum board has strong moisture resistance, and the protective paper layer can prolong the time for the board to absorb water, but it cannot prevent water absorption. During the installation and construction process, the strength of the protective paper layer and the gypsum board will be r...

AI Technical Summary

Problems solved by technology

[0004] Due to the unreasonable structure and layout of glass fiber bars in the prior art, it is impossible to achieve the ideal bar density and bar layout uniformity, and increasing the number of glass fiber bars alone will not only fail to achieve the desired effect, but also Excessive use of glass fibers will lead to an increase in manufacturing costs and a decline in environmental performance. Therefore, the mechanical strength, fire stability and fire resistance performance of gypsum boards with glass fiber reinforcements are still low, far from to satisfy the market's needs

The problem that the reinforcement density and the distribution uniformity of the ribs of the existing glass fiber mesh cloth are difficult to reach the ideal level is a problem that is difficult to solve at present, because the actual situation of the existing glass fiber mesh cloth used for gypsum board During the production process, there are two major technical contradictions: one of the contradictions is that the larger the diameter of the glass fiber monofilament due to microcracks, the lower the strength of the glass fiber filament, so the actual usable glass fiber monofilament diameter is only The tensile load of such thin glass fibers is very small on the order of tens of microns. For this reason, glass fiber bundles composed of many monofilaments are usually used as a grid reinforcement. In order to improve the strength of gypsum boards, a single glass fiber needs to be added. The number of monofilaments in the bundle, but the more the number of monofilaments in a single glass fiber bundle, the more uneven the strength distribution of the gypsum board; the second contradiction is that due to the limitation of the weavability of glass fibers and the fiber The contradiction that the damage is aggravated as the grid becomes smaller, the actual minimum grid size can only be on the order of tens of millimeters, and the larger the grid size, the smaller the reinforcement density

It can be seen that due to the limitations of the above-mentioned technical contradictions, the existing glass fiber mesh reinforcement of plasterboards has the defects of too many monofilaments in single-strand glass fiber bundles and too large mesh size. This leads to the problem that the amount of glass fiber is too large, the density of reinforcement is small and the distribution of reinforcement is uneven, so that the existing glass fiber mesh cloth cannot form a sufficient tensile force on the surface of the gypsum board core and effectively reinforce the gypsum core material. The effective surface structure, or the structural product obtained by bonding the existing glass fiber mesh cloth on the existing protective paper, cannot Satisfies the requirements of being able to form the surface layer structure and be able to withstand sufficient tension and play an effective reinforcing role, so the technical effect of the grid reinforcement layer product with protective paper of the present invention cannot be obtained

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