JPH0367481B2 - - Google Patents
Info
- Publication number
- JPH0367481B2 JPH0367481B2 JP16249584A JP16249584A JPH0367481B2 JP H0367481 B2 JPH0367481 B2 JP H0367481B2 JP 16249584 A JP16249584 A JP 16249584A JP 16249584 A JP16249584 A JP 16249584A JP H0367481 B2 JPH0367481 B2 JP H0367481B2
- Authority
- JP
- Japan
- Prior art keywords
- plywood
- water
- veneer
- knots
- soluble polymer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000011120 plywood Substances 0.000 claims description 20
- 229920003169 water-soluble polymer Polymers 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 239000002023 wood Substances 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 description 11
- 230000001070 adhesive effect Effects 0.000 description 11
- 238000007127 saponification reaction Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 description 4
- 239000004809 Teflon Substances 0.000 description 3
- 229920006362 Teflon® Polymers 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000007731 hot pressing Methods 0.000 description 2
- 239000011122 softwood Substances 0.000 description 2
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Veneer Processing And Manufacture Of Plywood (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は構築用・建築用あるいは家具用の合
板の製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing plywood for construction, construction, or furniture.
合板の製造時、節のある単板（特に針葉樹単板
は節が多い）は乾燥中に節が抜け、その抜け節が
一定の大きさに切断した合板の木口に来たときは
その部分に凹みを生じ、合板強度が低下したり見
栄えが悪くなるので節の部分に予じめ紙テープを
貼着して節を固定していた。
When manufacturing plywood, knotted veneers (especially softwood veneers have many knots) shed knots during drying, and when the loose knots reach the end of the plywood cut to a certain size, they This would cause dents, which would reduce the plywood's strength and make it look bad, so paper tape was pasted to the knots in advance to fix the knots.
単板の節の部分に紙テープを貼着すると紙テー
プの紙間はくりによつて合板の接着強度が低下す
るという欠点があつた。
When paper tape is attached to the knots of the veneer, there is a drawback that the adhesive strength of the plywood decreases due to the separation of the paper tape.
この発明は単板の節抜けを防止するとともに合
板の接着強度の低下をも防止しようとするもので
ある。 This invention aims to prevent knots from falling out of veneers and also to prevent a decrease in adhesive strength of plywood.
この発明は木質単板を積層して合板を製造する
に際し、単板の節部分に水溶性高分子フイルムを
貼着することを特徴とする合板の製造方法に係る
ものである。
The present invention relates to a method for manufacturing plywood, which is characterized in that when manufacturing plywood by laminating wood veneers, a water-soluble polymer film is attached to the knots of the veneers.
以下この発明について詳述する。 This invention will be explained in detail below.
ロータリーレース、スライサー等で切削して得
られたラワン単板に代表される南洋材単板や針葉
樹単板の節部分にテフロンロール等でポリビニル
アルコール・ビニロン等の水溶性高分子フイルム
を貼着する。ここにおいて単板の節部分とは、節
とその節の外周に隣接している単板部分も含み、
合板とは単板をその繊維方向から一枚毎に直交す
るように仕組んだ合板や繊維方向をそろえて仕組
んだ積層単板等を含む。また水溶性高分子フイル
ムを貼着する場合、若干の水分を必要とするの
で、低含水率の単板は表面に少量の水を塗布して
から水溶性高分子フイルムを貼着すればよい。水
溶性高分子フイルムの貼着方法としては、単に
単板に貼着して乾燥させるだけのものと、単板
に載置した後に軽く熱圧することを必要とするも
のとの二種類がある。との水溶性高分子フイ
ルムの性質はその鹸化度によつて異なつており、
鹸化度が88モル％以下であれば非常に水に溶けや
すく水分さえあれば貼着する性質を有しており、
鹸化度が88モル％を越えると水溶性ではあるが常
温の水では溶けにくく加熱する必要がある。例え
ば鹸化度が88〜97モル％であれば溶かす水の温度
は40〜60℃が必要であり、100モル％近くになる
と100℃以上の温度が必要になる。なお、当然の
ことながら加熱温度はポリビニルアルコールの融
解温度以下で処理する必要がある。 A water-soluble polymer film such as polyvinyl alcohol or vinylon is pasted using a Teflon roll or the like to the knots of a South Sea wood veneer such as lauan veneer or a softwood veneer obtained by cutting with a rotary lace or slicer. . Here, the knot part of the veneer includes the knot and the veneer part adjacent to the outer periphery of the knot,
Plywood includes plywood in which the fibers of each veneer are arranged perpendicularly to each other, and laminated veneers in which the fibers are arranged in the same direction. Furthermore, when attaching a water-soluble polymer film, a small amount of water is required, so for veneers with low moisture content, it is sufficient to apply a small amount of water to the surface before attaching the water-soluble polymer film. There are two types of methods for attaching water-soluble polymer films: those that simply adhere to a veneer and dry them, and those that require light heat-pressing after being placed on the veneer. The properties of water-soluble polymer films differ depending on the degree of saponification.
If the degree of saponification is 88 mol% or less, it is highly soluble in water and has the property of sticking as long as there is moisture.
If the degree of saponification exceeds 88 mol%, it is water-soluble but difficult to dissolve in water at room temperature and requires heating. For example, if the saponification degree is 88 to 97 mol%, the temperature of the water to be dissolved needs to be 40 to 60°C, and if it is close to 100 mol%, a temperature of 100°C or higher is required. Note that, as a matter of course, the heating temperature must be lower than the melting temperature of polyvinyl alcohol.
水溶性高分子フイルムを貼着した単板は、接着
剤塗布面にスプレツダーで接着剤が塗布された
後、仕組工程で仕組まれ、冷圧工程、熱圧工程を
経て合板となるが、一般に合板製造に使用される
接着剤が水溶性（エマルジヨンを含む）であるた
めに接着剤と水溶性高分子フイルムのなじみがよ
く、合板の接着強度に悪影響を及ぼすようなこと
がほとんどない。 The veneer to which water-soluble polymer film is attached is made into plywood by applying adhesive to the adhesive-coated surface using a spreader, then assembling it, and then going through a cold pressing process and a hot pressing process, but it is generally made from plywood. Since the adhesive used in manufacturing is water-soluble (including emulsion), the adhesive and water-soluble polymer film are compatible, and there is almost no negative effect on the adhesive strength of the plywood.
実施例 １
ロータリーレースで切削した厚さ３mmの単板の
直径２cmの節に、４cm×４cmの大きさで0.07mm厚
の鹸化度84モル％の水溶性ポリビニルアルコール
フイルムをテフロンロールで押えて貼着した後、
ロール式ドライヤーで乾燥した。Example 1 A water-soluble polyvinyl alcohol film measuring 4 cm x 4 cm and having a saponification degree of 84 mol% and having a saponification degree of 84 mol% was pasted on a 2 cm diameter knot of a 3 mm thick veneer cut with a rotary lace using a Teflon roll. After arriving,
Dry with a roll dryer.
この単板の両面にスプレツダーで水溶性尿素樹
脂接着剤を塗布し、厚さ１mmの表板と裏板でサン
ドイツチ状に仕組み、６Kg／cmで20分間冷圧後
120℃、８Kg／cm2の条件で２分間熱圧して所望の
合板を得た。この合板の節部分を切断してみたが
節抜けはなかつた。また接着強度の低下も見られ
なかつた。 A water-soluble urea resin adhesive was applied to both sides of this veneer using a spreader, and a 1 mm thick top and back plate were formed into a sandwich-like structure, and after cold pressing at 6 kg/cm for 20 minutes.
The desired plywood was obtained by hot pressing for 2 minutes at 120° C. and 8 kg/cm 2 . I tried cutting the knots of this plywood, but no knots came out. Further, no decrease in adhesive strength was observed.
実施例 ２
ロータリーレースで切断した厚さ３mmの単板の
直径５cmの節に、７cm×７cmの大きさで0.07mm厚
の鹸化度98モル％の水溶性ポリビニルアルコール
フイルムをテフロンロールで押えて水分により密
着させた状態に載置し、その後120℃で軽く圧着
し、ロール式ドライヤーで乾燥した。Example 2 A water-soluble polyvinyl alcohol film measuring 7 cm x 7 cm and having a saponification degree of 98 mol% and having a saponification degree of 98 mol% was pressed with a Teflon roll onto a 5 cm diameter joint of a 3 mm thick veneer cut with a rotary lace to remove moisture. After that, it was lightly pressed at 120°C and dried with a roll dryer.
以下実施例１と同じ工程で所望の合板を得た。
この合板の節部分を切断してみたが節抜けはなか
つた。また接着強度の低下も見られなかつた。 Desired plywood was obtained by following the same steps as in Example 1.
I tried cutting the knots of this plywood, but no knots came out. Further, no decrease in adhesive strength was observed.
この発明は上述のように構成されているので、
単板の節抜けを防止でき、かつ合板の接着強度の
低下をも防止できる利点を有する。
Since this invention is configured as described above,
It has the advantage of preventing knots in the veneer and also preventing deterioration in the adhesive strength of the plywood.
Claims (1)
単板の節部分に水溶性高分子フイルムを貼着する
ことを特徴とする合板の製造方法。1 When manufacturing plywood by laminating wood veneers,
A method for manufacturing plywood, which comprises attaching a water-soluble polymer film to the joints of a veneer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16249584A JPS6140102A (en) | 1984-07-31 | 1984-07-31 | Manufacture of flitch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16249584A JPS6140102A (en) | 1984-07-31 | 1984-07-31 | Manufacture of flitch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6140102A JPS6140102A (en) | 1986-02-26 |
| JPH0367481B2 true JPH0367481B2 (en) | 1991-10-23 |
Family
ID=15755705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16249584A Granted JPS6140102A (en) | 1984-07-31 | 1984-07-31 | Manufacture of flitch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6140102A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5124263B2 (en) * | 2007-12-27 | 2013-01-23 | Ｄｉｃ株式会社 | Woody laminated material and method for producing the same |
-
1984
- 1984-07-31 JP JP16249584A patent/JPS6140102A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6140102A (en) | 1986-02-26 |
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