JPS5914470A - Sand paper and method of producing same - Google Patents

Abstract

PURPOSE:To provide effective sand paper by mixing grind grains and liquefied paper material for producing paper, sprinkling grind grains onto wet paper or coating completed paper with grind grains to permit the paper to be uniformly impregnated with grind grains. CONSTITUTION:Grind grains mixed into water through a constant volume pump are continuously cast into a flow box of a circular net type paper marking machine for making paper. Or grind grains are continuously cast from an apparatus 23 onto a completely liquefied paper material in a stock inlet 21 of a long net type paper making machine 20, or grind grains are continuously uniformly sprinkled from the apparatus 23 onto a wet paper layer flowed from a stock inlet onto a wire part 22 to form sand paper impregnated with grind grains. In a further method, a completed paper is impregnated from the both sides with grind grains mixed into water through a coating unit or injected from a nozzle of a dumping unit. Thus, the grind grains put into the paper are exposed on the surface every time it is rubbed so that effective grinding can be effected.

Description

[Detailed description of the invention] This article relates to abrasive paper and its paper-making method.

Conventional coated abrasive paper is made by adhering abrasive grains or fine abrasive powder to a desired surface using a synthetic resin or an adhesive such as glue. Therefore, the number of steps increases because it is bonded secondarily after the papermaking process, and since the abrasive is on the surface, it is difficult to use it for finishing 6R polishing work.

This invention involves continuously adding abrasive fine powder to a completely liquid paper stock dissolved in water during the papermaking process, and continuously sprinkling the abrasive fine powder onto wet paper, or coating the finished paper. To provide a paper making method and abrasive paper in which the white paper is uniformly impregnated with the abrasive fine powder by damping or the like.

According to this invention, there is no need to add abrasive fine powder as a secondary addition after the paper making process, and it is not necessary to add abrasive fine powder to completely liquid paper stock during the paper making process, or to sprinkle the abrasive fine powder on wet paper. Alternatively, the finished paper can be coated and damped to uniformly impregnate the white paper with the abrasive powder, thereby eliminating the step of adhering the abrasive powder. Therefore, in the case of conventional coated abrasive paper, the abrasive powder is uniformly dispersed and impregnated into the white paper, compared to the case where abrasive grains are coated with an adhesive on the front, back, or both sides of the paper. Therefore, this abrasive paper not only removes dust but also
The oil film can also be wiped off, and the polished surface of the workpiece is not damaged and a mirror-like luster can be obtained by final polishing.

Furthermore, this research Ia! If you carry out sanding work on paper.

The paper-white abrasive powder is rubbed and leached to the surface, resulting in an excellent polishing effect.

Next, each invention will be described in detail with reference to the drawings.

In FIG. 1 showing the embodiment of the first invention, flow box 2. Paper making tank 3. Press bart 4, dryer
Part 141 Cylindrical paper machine 1 consisting of take-up bar 15
Polishing fine powder dissolved in water can be continuously introduced into the flow box from a tank 16 via a metering pump 17. The press bar 4 is provided with a satin box 8t inside the first blanket 7 guided by the coach roll 51 guide row #6.

(press row) A doctor knife 9 is installed near the vlo, and the wet paper P guided by the press bart 4 is pressed 0 row/l/10, big up row 1v11.
．． A second blanket 16 guided by a touch writing roll 12 is guided to a dry fire bar 14, dried and rolled up by a winding bar 15.

The powder used in this invention has a weight ratio of 1 to 3 times the weight of the dry abrasive paper, and has an average particle size of 5 fn to
For example, the chemical composition is as follows.

wt% CaO44,55 M! 10 0.20 A120526.61 Si020.15 Nα02 0.01 to 20
α01 pg2()t 0.04 Sos O,16 1gloss 2B,47 Total 100.00% When making paper using this papermaking method 41!1, if the above-mentioned abrasive fine powder is continuously added to the complete paper stock, it will be An abrasive paper uniformly impregnated with the abrasive fine powder is obtained.

In FIG. 2 showing an embodiment of the second invention, a fourdrinier paper machine 20
In the paper making method according to the above method, a device 26 is provided for continuously and uniformly applying abrasive powder to the upper part of the stock inlet 21 or the wire bar 22.

In paper making using this method, the stock inlet 2
The above-mentioned abrasive powder is applied to the completely liquid paper stock in the device f! E2!
The material continuously inputted from S is continuously and uniformly sprinkled from the device 23 onto the wet paper layer formed by flowing onto the wire bart 21 from the stock inlet.

In FIG. 5 showing an embodiment of the coating method of the third invention, a finished paper P made by a cylinder paper machine 1 or a Fourdrinier paper machine 20 is coated with water via a coating device (coater) 50. The finished white paper is impregnated with the dissolved abrasive powder from both sides. 2 Tanks 51 of coating device #130 are provided on both sides of the finished paper P, and the abrasive fine powder solution in each tank is applied to both sides of the finished paper through a plurality of cylinders 52 and impregnated uniformly, After passing through a dryer 55, the paper is dried to obtain abrasive paper.

4 @ In Fig. 4 showing an example of Akira's damping method,
The solution is applied to both sides of the finished paper P by a damping device 40 that continuously sprays the etm imitation powder solution from a plurality of nozzles/I/42 bored at regular intervals in the longitudinal direction of a pair of pipes 41 facing each other. After being sprayed, the paper is passed through a dryer 56 and dried to obtain GFT karakami.

The abrasive paper made according to this invention can be used not only for removing dust and oil films, but also for polishing and final polishing of optical glass, plastics, brass casting, stainless steel, etc., and the abrasive paper is rubbed during the polishing process. An example of effective polishing and final polishing where the fine abrasive powder that has been repeatedly pressed into the white paper leaches out to the surface.

[Brief explanation of drawings]

Fig. 1 is a schematic side view of an embodiment of the cylinder paper making method of the first invention, Fig. 2 is a schematic side view of an embodiment of the Fourdrinier paper making method of the second invention, and Fig. 6 is a schematic side view of an embodiment of the Fourdrinier paper making method of the second invention. A schematic side view of an example of coating finished paper with an aqueous polishing powder solution, Figure 4 is @4
FIG. 2 is a schematic side view of an embodiment of damping an aqueous abrasive powder solution according to the invention. 1... Cylindrical paper machine; 16... 4 ft 'It's powder water powder aqueous solution tank; 20. Penetration paper machine; 23... Polishing copying powder sprinkler; 50... Coating device; 40.
...damping device.

Claims (1)

[Claims] +11 A method for making abrasive paper in which fine abrasive powder dissolved in water is continuously added and mixed uniformly with completely liquid paper stock, and the abrasive powder is evenly incorporated into the white paper. (2) A method of making abrasive paper in which fine abrasive powder is continuously sprinkled onto wet paper to uniformly impregnate the paper white with the fine abrasive powder. (3) A method of making abrasive paper in which the finished paper is impregnated with fine abrasive powder through coating, damping, etc. and then dried. (4) Abrasive paper according to claims 11 to (3), which is made by uniformly impregnating white paper with abrasive powder.