JP3245784U - plywood - Google Patents
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- JP3245784U JP3245784U JP2023004695U JP2023004695U JP3245784U JP 3245784 U JP3245784 U JP 3245784U JP 2023004695 U JP2023004695 U JP 2023004695U JP 2023004695 U JP2023004695 U JP 2023004695U JP 3245784 U JP3245784 U JP 3245784U
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- plywood
- veneer
- veneers
- melt adhesive
- hot melt
- Prior art date
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- 239000011120 plywood Substances 0.000 title claims abstract description 49
- 239000004831 Hot glue Substances 0.000 claims abstract description 22
- 238000010030 laminating Methods 0.000 claims abstract description 6
- 238000010586 diagram Methods 0.000 abstract 1
- 239000011162 core material Substances 0.000 description 12
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 229920000877 Melamine resin Polymers 0.000 description 3
- 239000004640 Melamine resin Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000005011 phenolic resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 239000002023 wood Substances 0.000 description 3
- 229920001807 Urea-formaldehyde Polymers 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000270281 Coluber constrictor Species 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000011094 fiberboard Substances 0.000 description 1
- OQZCSNDVOWYALR-UHFFFAOYSA-N flurochloridone Chemical compound FC(F)(F)C1=CC=CC(N2C(C(Cl)C(CCl)C2)=O)=C1 OQZCSNDVOWYALR-UHFFFAOYSA-N 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000010454 slate Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Landscapes
- Veneer Processing And Manufacture Of Plywood (AREA)
Abstract
【課題】安価に容易に製造できる合板を提供する。【解決手段】本考案の一観点に係る合板は、単板を、三層以上の奇数層かつ木目が直交するよう積層して一体化された合板であって、前記単板同士の間隙が、ホットメルト接着剤によって接合され、かつ、合板の厚みを所定の厚みに調整されたものである。また、本観点において、限定されるわけではないが、合板は、前記ホットメルト接着剤を前記単板上に塗布し、直ちに他の前記単板を重ねて、二本ロール（プレスロール）に通して一体化したものであることが好ましい。【選択図】 図１[Problem] To provide plywood that can be manufactured easily at low cost. [Solution] A plywood according to one aspect of the present invention is a plywood made by laminating three or more odd-numbered veneers with grains perpendicular to each other and integrating the veneers, wherein the gaps between the veneers are They are joined using hot melt adhesive, and the thickness of the plywood is adjusted to a predetermined thickness. In addition, in this aspect, although not limited to, the plywood may be prepared by applying the hot melt adhesive on the veneer, immediately stacking another veneer on top of the veneer, and passing the plywood through two rolls (press rolls). It is preferable that the two are integrated. [Selection diagram] Figure 1
Description
本考案は、合板に関し、より具体的には、ホットメルト接着剤を用いた合板に関する。 TECHNICAL FIELD The present invention relates to plywood, and more specifically to plywood using hot melt adhesive.
従来の合板の製造方法には、原木をレーサーで「かつら剥き」にした単板を、三層、五層、・・・と、奇数枚木目を直角になるように重ね合わせ、単板の間に尿素樹脂、メラミン樹脂、フェノール樹脂等の水溶性初期縮合物を主体とした接着剤を塗布し、ｃｏｌｄ ｐｒｅｓｓ、多段ｈｏｔ ｐｒｅｓｓを用いて、加熱、加圧して樹脂の硬化を進めて製造するものがある。 The conventional method of manufacturing plywood involves stacking an odd number of veneers made by ``wig-stripping'' raw wood with a racer so that the grains of the veneers are perpendicular to each other in three, five, etc. layers, and applying urea between the veneers. There are products that are manufactured by applying an adhesive based on a water-soluble initial condensate such as a resin, melamine resin, or phenol resin, and curing the resin by applying heat and pressure using cold press or multi-stage hot press. .
また、合板の表面と裏面の二枚の単板は繋ぎの無い単板を用いるが、内部の中芯部の単板は、例えば３尺×６尺の定尺に満たない半端な単板を繋ぎ合わせた中芯単板を多用している。 In addition, the two veneers on the front and back sides of the plywood are made of unjointed veneers, but the veneer in the center of the interior is made of irregular veneers that are less than the standard size of, for example, 3 shaku x 6 shaku. It makes extensive use of core veneers that are joined together.
従来の接着剤の尿素樹脂、メラミン樹脂、フェノール樹脂の硬化及び水分の蒸発には、薄い三層合板でも、１２０℃２０分以上とかなりのエネルギーと時間を必要とする。そのため、生産効率が悪く、ベニヤ会社は夜間も稼働せざるを得ない。 Conventional adhesives such as urea resin, melamine resin, and phenol resin require a considerable amount of energy and time to harden and evaporate water, taking more than 20 minutes at 120°C, even for thin three-layer plywood. As a result, production efficiency is poor, and veneer companies are forced to operate at night.
また、設備も、３尺×６尺の多段式ｈｏｔ ｐｒｅｓｓや、その前後のｌｏａｄｅｒ、ｕｎｌｏａｄｅｒと高額な設備が必要になる。 In addition, expensive equipment is required, including a multi-stage hot press measuring 3 x 6 feet, and loaders and unloaders before and after the hot press.
そこで、本考案は、上記課題に鑑み、より省エネルギー、短時間かつ低コストで製造することができる合板を提供することを目的とする。 Therefore, in view of the above-mentioned problems, the present invention aims to provide plywood that can be manufactured more energy-savingly, in a shorter time, and at a lower cost.
本考案では、従来の尿素樹脂、メラミン樹脂、フェノール樹脂等の水溶性初期縮合物接着剤の代わりにホットメルト接着剤を用いた。すなわち、溶融したホットメルト接着剤を単板に塗布し、積層したものを、予め間隙を合板の厚みに調節した二本ロール（プレスロール）に通せば目的の合板ができる。 In the present invention, a hot melt adhesive is used in place of the conventional water-soluble initial condensate adhesive such as urea resin, melamine resin, or phenol resin. That is, by applying molten hot-melt adhesive to a veneer and passing the laminated layer through two rolls (press rolls) whose gap has been adjusted to the thickness of the plywood, the desired plywood can be obtained.
より具体的に、本考案の一観点に係る合板は、単板を、三層以上の奇数層かつ木目が直交するよう積層して一体化された合板であって、前記単板同士の間隙が、ホットメルト接着剤によって接合され、かつ、合板の厚みが単板同士の間隙ではない所定の厚みに調整されたものである。 More specifically, the plywood according to one aspect of the present invention is a plywood made by laminating three or more odd-numbered veneers so that the grains of the veneers are perpendicular to each other, and where the gaps between the veneers are , the plywood is bonded with a hot melt adhesive, and the thickness of the plywood is adjusted to a predetermined thickness that is not the gap between the veneers.
また、本観点において、限定されるわけではないが、合板は、前記ホットメルト接着剤を前記単板上に塗布し、直ちに他の前記単板を重ねて、二本ロール（プレスロール）に通して一体化したものであることが好ましい。 In addition, in this aspect, although not limited to, the plywood may be prepared by applying the hot melt adhesive on the veneer, immediately stacking another veneer on top of the veneer, and passing the plywood through two rolls (press rolls). It is preferable that the two are integrated.
また、塗布にはロールコーター、フローコーター、スプレー方式等があり、塗布パターンもベタ塗り、線状、点状塗布等方式は問わない。 Further, coating methods include a roll coater, a flow coater, a spray method, and the like, and the coating pattern may be solid coating, linear coating, dot coating, etc., and does not matter.
中芯単板としては、繋ぎのある前述の中芯単板の他、ひき板、集成材、繊維素板、パーチクルボード、段ボール、目的によりハニカムコア（紙製、アルミ製）、金属板、プラスチック板、スレート（石綿を含まず）等を適用できる。 In addition to the above-mentioned connected core veneers, core veneers include sawn boards, laminated wood, fiberboard, particle board, cardboard, and depending on the purpose, honeycomb cores (paper or aluminum), metal plates, and plastic boards. , slate (not containing asbestos), etc. can be applied.
なお、上記の溶融したホットメルト接着剤を単板に塗布後、ホットメルト接着剤が冷却固化する前に、目付１５ｇｒ～３０ｇｒ／ｍ２、大きさ３尺×６尺の不織布を載せ、以下積層、二本ロールを通して得た合板は、縦横の引張強度が平均化され、且つ裏割れが無くなる利点が得られる。同様に、予めホットメルト接着剤を含浸した３尺×６尺の不織布シートを単板の間に挟み、積層したものを遠赤外線加熱等でホットメルト接着剤が溶けるまで加熱後に二本ロールに通しても同じ効果が得られる。 In addition, after applying the above melted hot melt adhesive to the veneer, and before the hot melt adhesive cools and solidifies, a nonwoven fabric with a basis weight of 15 gr to 30 gr/m 2 and a size of 3 shaku x 6 shaku is placed, and the following lamination is performed. The plywood obtained by passing through two rolls has the advantage that the longitudinal and lateral tensile strengths are averaged and there is no back cracking. Similarly, you can sandwich a 3 x 6 x 6 non-woven fabric sheet pre-impregnated with hot melt adhesive between the veneers, heat the stack with far infrared rays until the hot melt adhesive melts, and then pass it through two rolls. You can get the same effect.
以上、本考案によって、より省エネルギー、短時間かつ低コストで製造することができる合板を提供することができる。具体的には、従来の水溶性初期縮合物接着剤は必ず樹脂の硬化反応と水分の蒸発にかなりのエネルギーと時間が必要で、そのための設備は多段式ｈｏｔ ｐｒｅｓｓ等、高額にも拘わらず生産効率が悪いという課題があった。これに対し、本考案は、溶けたホットメルト接着剤を単板に塗布し、三層、五層・・・に積層したものを二本ロール（プレスロール）に通して一体化するだけで製造可能であり、時間とコストは桁違いに小さくなるといった効果がある。 As described above, according to the present invention, it is possible to provide plywood that can be manufactured in an energy-saving manner, in a short time, and at a low cost. Specifically, conventional water-soluble initial condensate adhesives always require a considerable amount of energy and time for the resin curing reaction and water evaporation, and the equipment for this is expensive, such as a multi-stage hot press, but production is difficult. The problem was that it was inefficient. In contrast, the present invention is manufactured by simply applying melted hot melt adhesive to a veneer, and then laminating three, five, etc. layers through two rolls (press rolls) to integrate them. It is possible, and the time and cost will be reduced by an order of magnitude.
以下、本考案の実施形態について図面を用いて詳細に説明する。ただし、本発明は多くの異なる形態による実施が可能であり、以下に示す実施形態に記載の例示にのみ限定されるわけではない。 Hereinafter, embodiments of the present invention will be described in detail using the drawings. However, the present invention can be implemented in many different forms and is not limited to the examples described in the embodiments below.
図１は、本考案に係る三層合板の断面図であり、図２は本考案に係る五層合板の断面図である。また、図３は、本考案に係る単板以外の各種中芯材料を用いた三層合板の断面図である。 FIG. 1 is a cross-sectional view of a three-layer plywood according to the present invention, and FIG. 2 is a cross-sectional view of a five-layer plywood according to the present invention. Moreover, FIG. 3 is a sectional view of a three-layer plywood using various core materials other than veneer according to the present invention.
これらの図で示すように、本実施形態に係る合板（以下「本合板」という。）は、単板を、三層以上の奇数層かつ木目が直交するよう積層して一体化された合板であって、単板同士の間隙が、ホットメルト接着剤によって接合され、かつ、合板の厚みを所定の厚みに調整されたものである。なお図中、１、１´は合板の表面、裏面の単板（繋ぎ無し）を、２、２´、２´´は中芯単板（繋ぎ有り）を、３はホットメルト接着剤を、４は中芯単板以外の中芯材料をそれぞれ示す。 As shown in these figures, the plywood according to this embodiment (hereinafter referred to as "this plywood") is a plywood that is made by laminating three or more odd layers of veneer so that the wood grains are perpendicular to each other. The gaps between the veneers are joined using hot melt adhesive, and the thickness of the plywood is adjusted to a predetermined thickness. In the figure, 1 and 1' are the front and back veneers of the plywood (without joints), 2, 2', and 2'' are the core veneers (with joints), and 3 is the hot melt adhesive. 4 indicates core materials other than the core veneer.
また、本合板は、前記ホットメルト接着剤を前記単板上に塗布し、直ちに他の前記単板を重ねて、二本ロール（プレスロール）に通して一体化したものである。 In addition, this plywood is obtained by applying the hot melt adhesive onto the veneer, immediately stacking another veneer, and passing it through two rolls (press rolls) to integrate the veneer.
また、本合板において、ホットメルト接着剤とは、熱をかけて溶かして密着させる接着剤をいうが、例えば下記の例を示すことができる。
なお、上記のホットメルト接着剤は均一になる迄溶融混合して得た場合において、軟化点（環球式）は１１０～１３０℃、１５０℃に於ける粘度（Ｂ型粘度計）は２０，０００～２５，０００ｍＰａ・ｓであった。また、１５０℃で溶解したホットメルト接着剤を、単板の片面又は両面にコーターで塗布し、直ちに前記の要領で積層したものを二本ロール（プレスロール）に通して三層合板、五層合板・・・を得ることができた。すなわち、この例によると、従来例に比べ、時間とコストは桁違いに小さくなるといった効果があることがわかる。 In addition, when the above hot melt adhesive is obtained by melting and mixing until uniform, the softening point (ring and ball type) is 110 to 130°C, and the viscosity at 150°C (B type viscometer) is 20,000. It was ~25,000mPa・s. In addition, hot melt adhesive melted at 150℃ is applied to one or both sides of the veneer using a coater, and the laminated sheets are immediately laminated as described above and passed through two rolls (press rolls) to create three-layer plywood, five-layer plywood, etc. I was able to obtain plywood... That is, it can be seen that this example has the effect of significantly reducing time and cost compared to the conventional example.
本考案は、合板として産業上の利用可能性がある。 The present invention has industrial applicability as plywood.
１、１´・・・合板の表面、裏面の単板（繋ぎ無し）
２、２´、２´´・・・中芯単板（繋ぎ有り）
３・・・ホットメルト接着剤
４・・・中芯単板以外の中芯材料
1, 1´...Plywood front and back veneer (no joints)
2, 2', 2''... Core veneer (with connection)
3... Hot melt adhesive 4... Core material other than core veneer
より具体的に、本考案の一観点に係る合板は、単板を、三層以上の奇数層かつ木目が直交するよう積層して一体化された合板であって、前記単板同士の間隙が、ホットメルト接着剤によって接合され、かつ、合板の厚みが所定の厚みに調整されたものである。 More specifically, the plywood according to one aspect of the present invention is a plywood made by laminating three or more odd-numbered veneers so that the grains of the veneers are perpendicular to each other, and where the gaps between the veneers are , which are bonded using hot melt adhesive, and the thickness of the plywood is adjusted to a predetermined thickness .
Claims (2)
2. The plywood according to claim 1, wherein the hot melt adhesive is applied to the veneer, and another veneer is immediately stacked on top of the veneer, and the plywood is integrated by passing through two rolls (press rolls). .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2023004695U JP3245784U (en) | 2023-12-28 | 2023-12-28 | plywood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2023004695U JP3245784U (en) | 2023-12-28 | 2023-12-28 | plywood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP3245784U true JP3245784U (en) | 2024-02-26 |
Family
ID=90010558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2023004695U Active JP3245784U (en) | 2023-12-28 | 2023-12-28 | plywood |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3245784U (en) |
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2023
- 2023-12-28 JP JP2023004695U patent/JP3245784U/en active Active
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