JP2014073587A - Decorative base plate composite conifer plywood - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a decorative base plate conifer composite plywood in which a surface or both surfaces of a conifer plywood are adhered with a wet type hard fiberboard (hard board), and a defect does not appear on a decorated surface, since a defect such as a knot appears on a decorated surface of a conifer plywood as a defect, and it is difficult to make a decorative conifer plywood.SOLUTION: A surface or both surfaces of a conifer plywood 2 are adhered with a wet type rear face embossment layer 4 formed at a rear face of a wet type hard fiberboard (hard board), and a knot 3 or the like that is a defect of a conifer plywood is embedded with a rear face embossment layer in which a specific gravity is low. Moreover, gas change such as a recess is performed by internal absorption by a layer of a rear face of a wet type hard fiberboard (hard board) in which a specific gravity is low.

Description

  The present invention relates to a decorative baseboard softwood composite plywood in which a wet hard fiberboard (hardboard) is secondarily bonded to a softwood plywood by hot pressing (adhering at the time of plywood production) or cold press on one side and both sides of the softwood plywood.

  Softwood plywood has many knots, etc. When a veneer veneer, synthetic resin sheet, synthetic resin film, coated paper, and after-coated paper are bonded to the surface, knots etc. appear as defects on the surface where makeup is made. Board plywood is not possible.

  There are also known three types of composite plywood made by using softwood plywood as a base material and placing and adhering a wood fiber board on the surface. (See Patent Document 1)

Japanese Patent No. 5-57841

  Softwood plywood has many knots, etc. When a veneer veneer, synthetic resin sheet, synthetic resin film, coated paper, or after-coated paper is bonded to the surface, defects such as knots appear as defects on the decorated surface. It was difficult to create. In a decorative baseboard softwood composite plywood in which a wet hard fiberboard (hardboard) is bonded to one or both sides of a softwood plywood, it is necessary to cover the defects that appear on the decorated surface.

  The present invention is characterized in that, as described in claim 1, the surface of the softwood plywood or the wet back surface embossed layer formed on the back surface of the wet hard fiberboard (hardboard) on the front and back surfaces is adhered to the surface of the softwood plywood. It is a dressing board softwood composite plywood. Further, as claimed in claim 2, the embossing layer has a thickness of about 40% (usually about 25%) with respect to each thickness of the wet hard fiberboard (hardboard). It is a board conifer composite plywood.

  Wet hard fiberboard (hardboard) that adheres to the front and back surfaces of softwood plywood is made of wet hardfiberboard (hardboard) for bonding decorative veneer synthetic resin sheet, synthetic resin film, coated paper, or aftercoated paper. Sand the surface side smooth surface. The sander takes the release material for release when wet hard fiberboard (hardboard) that remains on the smooth surface is pressed, and the bedrock layer that exists on the surface of the smooth surface is only made smooth. leave.

  Wet hard fiberboard (hardboard) production maximizes the internal addition of additive resin to the pulp liquor.

  Thereafter, a thermosetting resin is externally added to the surface of the mat before pressing, and plate-making is performed by a high-pressure high-temperature press.

  Increase the bedrock layer and increase the bending strength and interlayer strength.

  By changing the emboss thickness as described above in proportion to the thickness of the wet hard fiberboard (hardboard) that adheres the length of the embossed layer, which is the backside mesh, to the surface of the softwood plywood, Lower and fill the drawbacks of softwood plywood.

  The dent etc. which are the faults of a softwood plywood are filled with the back surface embossing layer with the low specific gravity of the said wet hard fiber board (hard board). In addition, gas changes such as dents are internally absorbed by a low specific gravity layer on the back layer of the wet hard fiberboard (hardboard).

  According to the present invention, a softwood plywood made of cedar, straw, etc. as a raw material can be made into a decorative baseboard softwood composite plywood with no defects on the decorative surface.

Sectional drawing of a coniferous decorative baseboard composite plywood is shown.

  Softwood plywood has many defects such as joints, and even if MDF and high specific gravity MDF are bonded to the surface of softwood plywood, they cannot cover 100% of defects such as joints. The above wet hard fiberboard (hardboard) has a stable and strong rock layer, so the defects of coniferous plywood do not appear on the decorative surface, and the dent that is the defect of softwood plywood is the specific gravity of the wet hardfiberboard (hardboard) Fill with a low embossed layer on the back. Moreover, the gas change in the space in the dent, which is a disadvantage of softwood plywood, is internally absorbed by the back embossed layer on the wet hard fiber board (hardboard). Hereinafter, embodiments will be described with reference to the drawings.

  FIG. 1 shows a softwood plywood in which an odd number of softwood veneers are bonded and a decorative baseboard composite plywood in which the wet hard fiberboard (hardboard) is bonded to the surface of the softwood plywood 2. There are 1.25t, 1.5t, 2.7t, 3.0t, 3.2t, etc., and the softwood plywood that constitutes the softwood plywood is bonded by heat-pressure bonding. Although it was prepared, many defects such as nodes were observed on the surface of the conifer plywood.

  The wet hard fiberboard (hardboard) uses a thickness of 1.5 to 2.5 t, and has the same dimensions as the softwood plywood.

  This wet hard fiber board (hard board) forms an embossed layer having a thickness of about 40% on the back surface. The thickness forming method of the embossed layer is created by changing the thickness of the dewatering wire mesh at the time of plate making.

  Currently, softwood plywood is mainly used for structural plywood and double-floor underlays, and the veneering board plywood is mainly south-seawood plywood mainly made of raw lauan wood. Producing a coniferous veneer composite plywood increases the use of domestic timber and revitalizes domestic forests.

  The domestic plywood manufacturing industry can be activated, and the domestic forest business can be activated.

1. Wet hard fiberboard (hardboard)
2, conifer plywood 3, defects such as joints 4, embossed layer 5 of wet hard fiberboard (hardboard), composite baseboard composite plywood

Claims (2)

  A decorative baseboard softwood composite plywood, characterized in that a wet hard fiberboard (hardboard) having a backside embossed layer of low specific gravity is bonded to the surface or both surfaces of a softwood board.   2. The decorative baseboard softwood composite plywood according to claim 1, wherein the back embossed layer of the wet hard fiberboard (hardboard) is about 40% of each board thickness.