JPH05193084A - Laminated sheet, production thereof, building material and packing material - Google Patents

Abstract

PURPOSE:To obtain an inexpensive laminated sheet enhanced in practicality by embodying the reutilization of a newspaper by laminating and bonding a large number of old newspapers in a state shifted in the same direction by a predetermined interval while longitudinal and lateral sides are mutually kept parallel. CONSTITUTION:The longitudinal sides 1a, 1b of an old newspaper 1B are just aligned with the longitudinal sides 1a, 1b of the preceding old newspaper 1A and both newspapers are superposed one upon another in such a state that the lateral side 1c of the old newspaper 1B is parallelly shifted from the lateral side 1c of the preceding old newspaper 1A by a predetermined interval L1 in the direction shown by an arrow H. At this time, predetermined interval L1<=L3 of unprinted part is set. Therefore, the printed part 1h of the preceding old newspaper 1A is entirely covered with the upper old newspaper 1B to be not exposed to the outside. Continuously, the next old newspaper is further superposed on the old newspaper 1B in the same way and separate old newspapers are repeatedly superposed thereon in the same way in succession and the already superposed parts are pressed for a definite time under definite pressure to be dried.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated board using newspaper waste paper, a building material and a packaging material to which the same is applied, and a method for manufacturing the laminated board.

[0002]

2. Description of the Related Art Conventionally, used newspaper (newspaper waste) is used as a raw material for recycled pulp. Newspaper waste is chemically treated to make recycled pulp. However,
In recent years, there is an urgent need to protect forest resources and green environments, and it is desired to develop a more appropriate recycling method for newspaper wastepaper that occurs in large quantities every day.

[0003]

SUMMARY OF THE INVENTION In view of the above circumstances, the present invention provides a laminated board which realizes appropriate reuse of newspaper and is highly practical because it is inexpensive.
The second object is to provide a method capable of easily obtaining such a useful laminated plate.

[0004]

In order to solve the first problem, in the laminated board according to the present invention, a large number of newspaper waste papers are kept parallel to each other in vertical and horizontal sides and are shifted by a predetermined distance in the same direction. The structure is such that they are laminated and bonded together. In the laminated board of the present invention, it is preferable that the printed portion of the newspaper waste paper is offset and the newspaper waste paper is displaced at intervals that do not appear on the surface of the laminated paper sheet.

In addition, in the case of the laminated plate of the present invention, it is preferable that the laminated plate is molded into a predetermined shape according to the purpose because it is easy to use. The laminated plate of the present invention is suitable for building materials, packaging materials and the like. Specifically, it can be used as an exterior material, an interior material (for example, a substitute for a plywood board), or a case material for packaging. on the other hand,
In order to solve the second problem, in the method for manufacturing a laminated board according to the present invention, for example, as shown in FIG. 4, a large number of spread newspaper waste papers 1A, 1B ..., Vertical sides 1a, 1b. The sides 1c and 1d are kept parallel to each other and overlapped in the same direction (arrow H) by a predetermined distance L1. Of course, an adhesive agent is interposed between the overlapping surfaces 1e and 1f. Along with the stacking of newspaper waste paper, the laminate plate is continuously completed while extending in the direction of arrow H. It is exposed on the upper surface side of the laminated plate where a predetermined distance of the lateral side 1c side of each newspaper waste is obtained, and is exposed on the lower surface side of the laminated plate where a predetermined distance of the lateral side 1d side is obtained. ..

Note that, in FIG. 4, each newspaper waste paper has a vertical side of 1
The sides a and 1b are exactly aligned (not only kept in parallel but aligned with each other), and only the sides 1c and 1d are kept parallel to each other and are shifted by a predetermined distance L1 in the direction of arrow H, and are superposed. However, as shown in FIG.
The sides a and 1b may also be kept parallel, but they may not be exactly aligned, but may be overlapped by shifting by a predetermined distance L2, and the outside may be cut off from the dashed line portions E and F. However, the amount cut off is wasted.

In order to prevent the printed portion from being exposed on the surface of the obtained laminated plate, for example, only the unprinted portion (white background portion) 1g on the side of the newspaper waste paper may appear on the laminated plate surface. If the predetermined distances L1 and L2 are within the width L3 of the unprinted portion 1g on the side of the newspaper wastepaper, the upper surface of the laminated plate,
Only the unprinted part 1g is exposed on the bottom surface,
Naturally, the printed portion (dotted line portion) 1h is hidden and both sides are plain.

Of course, the predetermined distances L1 and L2 may be made larger than the width L3 of the unprinted portion 1g on the side of the newspaper waste paper. However, the printed portion 1h is exposed on the surface of the laminate. In this case, a beautiful paper different from newspaper waste paper may be attached to the surface of the laminated plate to hide the printed portion 1h. However, expensive paper and an extra sticking process are required, which increases costs.

When it is considered that the adhesive used in the production method of the present invention is recycled pulp after being used for a laminated plate, for example, an adhesive such as a vinyl acetate resin emulsion is preferable, but a solvent is used. A system adhesive may be used. In the case of the laminated plate manufacturing method of the present invention, the newspaper waste paper is superposed on the mold surface of the base having a mold surface of a predetermined shape, and is pressed and dried before being removed from the base. For example, lamination and molding can be performed at substantially the same time.

[0010]

With the laminated board of the present invention, proper reuse of newspaper can be realized. This is because newspaper wastepaper can be used in its original form (as it is in its original form). In addition, after being used as a laminated plate, it is possible to recycle pulp to reuse / reuse newspaper (new newspaper waste), which enables high-level recycling.

In addition, in the case of the laminated plate of the present invention, the material is about the newspaper waste paper and the adhesive, and it can be produced by a process of laminating and bonding the opened newspaper waste paper while slightly shifting it.
Since the material cost and the manufacturing cost are small, it is very inexpensive and easy to manufacture. In the case of a plain paper, in which the printed portion of newspaper waste paper is not exposed on the surface of the laminated plate, it cannot be seen from the appearance that it is made of newspaper waste paper, and the commercial value is high. When superposing newspaper waste papers, if the predetermined gap between the upper and lower paper pieces is set within the width of the unprinted portion on the side of the newspaper waste paper, a laminated plate in which only the unprinted portion is exposed can be naturally formed on the surface.

The laminated plate formed into a predetermined shape is very easy to use and its utility is much higher. The laminated plate of the present invention is suitable as a building material or a packaging material which is premised on mass consumption. This is because it is very cheap, and a large amount of newspaper waste paper, which is a material, is produced every day, and a large amount of laminated plates can be supplied. Newspaper waste paper is stacked on the mold surface of a base having a mold surface of a predetermined shape, and after stacking, it is dried and cured under pressure to form a predetermined shape There is an added advantage that the molding can be performed substantially at the same time, and the laminated plate can be manufactured in an easy-to-use form at low cost.
The laminated plate of the present invention is not limited to a flat plate, but has various shapes.

[0013]

Embodiments of the present invention will be described below. First,
As shown in Fig. 1, the first newspaper waste paper 1 in a fully opened state
Place A on the surface with adhesive applied. The adhesive may be applied to the entire surface of the newspaper wastepaper 1A, or may be applied only to a region overlapping with the next newspaper wastepaper 1B to be overlaid thereon.
The point is that there should be an adhesive on the superposed surfaces of the newspaper wastepaper 1A and 1B.

It should be noted that instead of using the entire surface of the newspaper waste paper as the adhesive application area, the non-application area J is dispersed over the entire surface as shown in FIGS. Is a pattern in which the non-application area J and the application area K are mixed in every several sheets instead of in all newspaper waste paper, it is effective for heat insulation inside the laminated plate. When an air layer is formed and it is a building material or packing material, it has high heat insulation performance.

Next, another newspaper wastepaper 1B is placed on the first newspaper wastepaper 1A. At this time, it is preferable that the newspaper waste paper B is coated with an adhesive or moistened by spraying or applying steam. In this case, small wrinkles hardly occur on the surface after the adhesive is dried. That is, as shown in FIG. 1, the vertical sides 1a and 1b of the newspaper wastepaper 1B are exactly aligned with the vertical sides 1a and 1b of the previous newspaper wastepaper 1A, and the horizontal side 1c is parallel to the horizontal side 1c of the previous newspaper wastepaper 1. They are overlapped with each other by shifting them by a predetermined distance L1 in the direction of arrow H. At this time, the predetermined interval L1 ≤ the width L3 of the unprinted portion
So that Therefore, the printed portion 1h of the previous newspaper wastepaper 1A is entirely covered with the upper newspaper wastepaper 1B and is not exposed on the surface. Needless to say, if the adhesive is not applied to the newspaper wastepaper 1B in advance, the adhesive is applied in the same manner as the newspaper wastepaper 1A.

Subsequently, the next newspaper wastepaper is further stacked on the newspaper wastepaper 1B, and another newspaper wastepaper is repeatedly superposed thereon in the same manner. Then, it is dried by applying a constant pressure for a certain period of time (may be naturally dried or may be heated and dried). In detail, as shown in FIG. 2, the newspaper waste papers are layered in a state of being slightly inclined at the same angle θ with respect to the surface line 11 of the laminated plate. The obtained laminated board is a paper board having strength equivalent to that of wood board while retaining the characteristics of paper.

In the laminated state, initially, the number of laminated sheets in the vertical section is not constant and gradually increases, but when seen through from above, the newsprint paper having an overlapping portion with the first newsprint paper 1A is used. The latest newspaper waste paper 1
After H, the number of stacked layers in the vertical section becomes substantially constant.
That is, the thickness of the laminated portion of the waste newspaper 1H after the lateral side 1dh is substantially constant. Therefore, normally, a cutting line is inserted vertically at the newspaper wastepaper 1H, and this is used as the starting point of the laminated plate. The end point is the lateral side 1dz of the newspaper wastepaper 1Z finally stacked. Since the thickness between the start point and the end point is substantially constant, the portion between the start point and the end point is usually used as the laminated plate.

Unprinted portion 1 on the upper and lower surfaces of the laminated plate
Although g is exposed and becomes plain, it cannot be seen from the appearance that it is made of newspaper, although it is made of newspaper.
Since the length of the laminated plate (dimension in the direction of arrow H) is proportional to the number of times of lamination, the length can be freely changed by adjusting the number of times of lamination. The width of the laminated plate can be the length of the lateral side of the newspaper waste, and a large width can be manufactured. Of course, newspaper waste paper may be cut into small pieces before lamination. Dimensional adjustment by this cutting is also possible.

The thickness of the laminated plate is proportional to the number of laminated newspaper waste papers in the vertical section, if the molding pressure is constant.
The number of stacked sheets is the length L4 of the newspaper waste paper divided by the predetermined distance L.
Determined by 1. Therefore, the thickness of the obtained laminated plate can be freely adjusted by adjusting the predetermined interval L1 or adjusting the vertical side dimension L4. Since the width of the unprinted portion of ordinary ordinary newspaper is about 10 to 15 mm, the predetermined distance L1 is usually 7 to 10 mm from a practical viewpoint.
It is good to set the range to some extent. In the case of making a thick one, if the number of laminated layers is too large, the time required for drying becomes long, and thus a plurality of thinly laminated plates may be stuck together. At this time, the laminated plates located on the front surface and the back surface are preferably plain ones, but the laminated plates in between are not required to be plain ones.

Further, as shown in FIG. 3, a mold surface (a mold surface having a predetermined shape) 20a in which two concave grooves run in the longitudinal direction is formed as shown in FIG. 3 without stacking newspaper waste paper on a flat surface. It is also possible to stack newspaper waste paper on the mold surface 20a of the base 20. After stacking the newspaper waste paper in close contact with the mold surface, an upper mold (not shown) having a counterpart mold of the mold surface 20a is fitted, pressed and dried, and then removed from the base 20. Thus, a molded laminate can be obtained. In addition to this, it is needless to say that the waste newspapers may be superposed on each other on a flat surface, and then the newspapers may be put into a mold and dried under pressure to be molded.

The shape of the mold surface has the same cross section (see FIG. 3).
In the case of)), or may have the same vertical cross section (for example, a wavy shape along the longitudinal direction). Actually, a waste paper of a general newspaper was fully opened (length: about 45 cm, width: about 80 cm) and a predetermined interval L1 was set to an unprinted width of 15 mm or less to obtain a plain laminated plate.
The thickness and the number of layers of the obtained laminated plate are as follows. Furthermore, superimposing on the mold surface shown in FIG.
It was dried under pressure and then removed from the mold, but a laminated plate molded according to the mold was obtained. As the adhesive, a vinyl acetate resin emulsion diluted with 3 to 4 times water was used.

Predetermined interval L1: 12 mm Number of laminated layers: 46 sheets Thickness: 3 mm Predetermined interval L1: 10 mm Number of laminated layers: 54 sheets Thickness: 3.5 mm Predetermined interval L1: 7 mm Number of laminated layers: 77 sheets Thickness: 5 mm Predetermined interval L1: 5 mm Laminated Number of sheets: 109 sheets Thickness: 7 mm (Note) Each newspaper waste has an average thickness of 0.065 mm.

[0023]

INDUSTRIAL APPLICABILITY In the laminated board of the present invention, since newspaper wastepaper can be utilized while keeping its original shape substantially, the newspaper can be appropriately reused, and after being used as a laminated board, it is recycled pulp. It is possible to reuse and reuse newspaper,
It is very useful because it is cheap and easy to implement.

If the printed portion of newspaper waste paper is not exposed on the surface of the laminated plate and it is plain, in addition, there is an advantage that the product value is increased because it is not known from the appearance that it is made of newspaper waste paper.
When the laminated plate is formed into a predetermined shape, it is very easy to use and its usefulness is further enhanced. The building material and packaging material comprising the laminated plate of the present invention are very useful because they can be supplied in large quantities and at low cost.

According to the manufacturing method of the present invention, the above useful laminated plate can be manufactured easily and at low cost.
Furthermore, when stacking newspaper waste paper, if the predetermined gap between the upper and lower paper pieces is within the width of the unprinted portion of the newspaper waste paper side, the printed portion of the newspaper waste paper is not exposed on the surface of the laminate. Moreover, the newspaper waste paper is laminated on the mold surface of the base having a mold surface of a predetermined shape, and after stacking, it is dried and cured under pressure. And shape it into the desired shape,
There is an added advantage that the lamination and the molding can be performed substantially at the same time, and the laminated plate can be easily manufactured at a low cost.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state of manufacturing a laminated board in an example.

FIG. 2 is a side view of a laminated board obtained in an example.

FIG. 3 is a perspective view showing a state of manufacturing a laminated board in another embodiment.

FIG. 4 is a perspective view for explaining an example of superposing newspaper waste paper according to the present invention.

FIG. 5 is a plan view showing another example of stacking newspaper waste paper according to the present invention.

FIG. 6 is a plan view showing an example of an adhesive application pattern on newspaper waste paper.

FIG. 7 is a plan view showing another example of the adhesive application pattern on newspaper waste paper.

[Explanation of symbols]

 1A Newspaper waste paper 1B Newspaper waste paper 1a Vertical side 1b Vertical side 1c Horizontal side 1d Horizontal side 1g Unprinted area 1h Printed area L1 Predetermined interval L3 Width of unprinted area

Claims (8)

[Claims] 1. A laminated plate obtained by laminating and bonding a plurality of newspaper waste papers in a state in which the longitudinal sides and the lateral sides are kept parallel to each other and are displaced by a predetermined distance in the same direction. 2. The newspaper waste is displaced at intervals such that the printed portion of the newspaper waste does not appear on the surface of the laminate.
The laminated plate described. 3. The laminated plate according to claim 1, which is formed into a predetermined shape. 4. A building material comprising the laminate according to any one of claims 1 to 3. 5. A packaging material comprising the laminated plate according to any one of claims 1 to 3. 6. A method for producing a laminated plate, which comprises stacking a plurality of spread newspaper waste paper sheets in a state in which vertical and horizontal sides are kept parallel to each other with a predetermined gap in the same direction, and then pressed and dried. .. 7. The method for manufacturing a laminate according to claim 6, wherein the predetermined interval is within the width of the unprinted portion on the side of the newspaper wastepaper. 8. The laminate according to claim 7, wherein the newspaper waste paper is superposed on the mold surface of a base having a mold surface having a predetermined shape, and is pressed and dried before being removed from the base. Method of manufacturing a plate.