JPH0544321B2 - - Google Patents
Info
- Publication number
- JPH0544321B2 JPH0544321B2 JP60138588A JP13858885A JPH0544321B2 JP H0544321 B2 JPH0544321 B2 JP H0544321B2 JP 60138588 A JP60138588 A JP 60138588A JP 13858885 A JP13858885 A JP 13858885A JP H0544321 B2 JPH0544321 B2 JP H0544321B2
- Authority
- JP
- Japan
- Prior art keywords
- wood
- colored
- veneer
- coloring
- synthetic resin
- 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 - Lifetime
Links
- 239000002023 wood Substances 0.000 claims description 73
- 238000004040 coloring Methods 0.000 claims description 27
- 229920003002 synthetic resin Polymers 0.000 claims description 24
- 239000000057 synthetic resin Substances 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 13
- 239000000975 dye Substances 0.000 description 12
- 238000004043 dyeing Methods 0.000 description 6
- 239000003086 colorant Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000011121 hardwood Substances 0.000 description 3
- 238000003801 milling Methods 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000004342 Benzoyl peroxide Substances 0.000 description 2
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 2
- 235000019400 benzoyl peroxide Nutrition 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical group C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 239000012192 staining solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920006305 unsaturated polyester Polymers 0.000 description 1
Landscapes
- Chemical And Physical Treatments For Wood And The Like (AREA)
Description
【発明の詳細な説明】
［技術分野］
本発明は、WPC（ウツドプラスチツクコンビネ
ーシヨン）における着色木材の製造方法に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a method for producing colored wood in WPC (wood plastic combination).
［背景技術］
木材を着色させる方法としては化学着色による
ものや染色によるものなどが既に知られている。
しかしこれらの方法では、着色の処理に長時間を
要することになり、また染料などを木材内に浸透
させて着色をおこなうことになるために、木材の
辺材部と心材部、木材の原木毎、木材の産地毎な
どによつて染料などの浸透の度合が異なるとこ
ろ、着色による色のばらつきが大きくなるという
問題がある。[Background Art] As methods for coloring wood, methods such as chemical coloring and dyeing are already known.
However, with these methods, the coloring process takes a long time, and because the coloring process involves penetrating the wood with dyes, etc., the sapwood and heartwood parts of the wood, as well as each log of the wood, are colored. However, there is a problem in that the degree of penetration of dyes etc. differs depending on the region where the wood is produced, resulting in large variations in color due to coloring.
一方、木材に合成樹脂を注入含浸して硬化さ
せ、木材を合成樹脂によつて強化させるWPCの
工法において、合成樹脂に着色剤を添加しておい
て木材の強化と同時に着色もおこなえるようにし
た試みが特開昭55−46907号公報によつて提供さ
れている。しかしWPCにおいては減圧釜など圧
力調整釜内において木材に合成樹脂を注入含浸さ
せるものであるが、合成樹脂に添加する着色剤の
種類を変更する場合に圧力調整釜の内部や配管等
の合成樹脂を十分に除去しておかないと色が混じ
つてしまうおそれがあるため、現実的には圧旅調
整釜一台について一色の着色合成樹脂しか使用す
るとができず、木材に着色できる色の種類が圧力
調整釜の台数に制限されてしまうという問題があ
つた。またこのものでは木材に注入含浸させる着
色合成樹脂で着色をおこなうために、木目を強調
するような着色をおこなうことができないもので
あつた。 On the other hand, in the WPC method of injecting and impregnating wood with synthetic resin and hardening it, the wood is strengthened with the synthetic resin, but by adding a coloring agent to the synthetic resin, it is possible to strengthen the wood and color it at the same time. An attempt is provided in Japanese Patent Application Laid-Open No. 55-46907. However, in WPC, synthetic resin is injected and impregnated into wood in a pressure regulating pot such as a vacuum pot, but when changing the type of colorant added to the synthetic resin, synthetic resin is added to the interior of the pressure regulating pot, piping, etc. If the wood is not sufficiently removed, there is a risk of color mixing, so in reality, only one color of colored synthetic resin can be used for each compression stroke adjustment pot, and the types of colors that can be colored on wood are limited. There was a problem that the number of pressure adjustment pots was limited. Furthermore, since this product is colored with a colored synthetic resin that is injected and impregnated into the wood, it is not possible to color the wood in a way that emphasizes the grain of the wood.
［発明の目的］
本発明は、上記の点に鑑みて為されたものであ
り、染料などの工法を必要とせず、また色の制限
を受けることなくWPC強化することができ、加
えて木目を強調した着色をおこなうことができる
着色木材の製造方法を提供することを目的とする
ものである。[Object of the invention] The present invention has been made in view of the above points, and it is possible to strengthen WPC without requiring dyes or other construction methods and without being subject to color restrictions. The object of the present invention is to provide a method for producing colored wood that can be colored in an accentuated manner.
［発明の開示］
しかして本発明に係る着色木材の製造方法は、
木材を蒸気で加圧加熱処理して木材を着色し、こ
の木材を着色液で処理して木材の導管部を着色
し、しかるのちに木材に合成樹脂を注入させて硬
化させることを特徴とするものであり、以下本発
明を詳細に説明する。[Disclosure of the Invention] The method for producing colored wood according to the present invention includes:
The method is characterized by coloring the wood by pressurizing and heating the wood with steam, treating the wood with a coloring liquid to color the conduit portion of the wood, and then injecting a synthetic resin into the wood and curing it. The present invention will be described in detail below.
木材としては、導管の径が大きい広葉樹をスラ
イスした単板を用いるのが好ましく、このような
広葉樹を用いるようにすれば木目を強調した着力
を容易におこなうことができる。そしてまずこの
木材を処理釜に入れ、処理釜内に蒸気を供給して
100〜150℃程度の温度、２〜10Kg／cm2程度の圧力
で木材を加熱加圧処理する。木材はこのような蒸
気による加熱加圧によつて全体が着色されること
になる。 As for the wood, it is preferable to use a veneer made by slicing a hardwood with a large conduit diameter, and by using such a hardwood, it is possible to easily create a binding force that emphasizes the grain of the wood. First, this wood is placed in a processing pot, and steam is supplied into the processing pot.
Wood is heated and pressure treated at a temperature of about 100 to 150°C and a pressure of about 2 to 10 kg/ cm2 . The entire wood is colored by heating and pressurizing it with steam.
次ぎに水溶性の染料や顔料を水などに溶解して
調製した着色液でこの木材を処理する。染色液に
よる処理は、木材を染色液に浸漬したり、木材の
表面に染色液をロールコーターなどで塗布した
り、あるいは木材の表面に染色液をスプレーじた
りしておこなうことができる。この染色液による
処理は木材の導管部に染料や顔料が浸透する程度
に軽くおこなうもので、木材の全体を染色さたり
するまでの長時間の処理はおこなわない。 Next, the wood is treated with a coloring solution prepared by dissolving water-soluble dyes and pigments in water. Treatment with a staining solution can be carried out by dipping the wood in the dyeing solution, applying the dyeing solution to the surface of the wood using a roll coater, or spraying the dyeing solution onto the surface of the wood. The treatment with this staining liquid is done lightly enough to allow the dye or pigment to penetrate into the pipes of the wood, and the treatment is not carried out for a long time to dye the entire wood.
このように木材の表面において導管部に染料や
顔料のような着色剤を浸透させて固定させたのち
に、木材を減圧釜など圧力調整釜に入れて、減圧
法あるいは減圧・加圧法により木材に合成樹脂を
含浸させる。合成樹脂といてはWPCに一般的に
用いられるもの、例えば不飽和ポリエステル−ス
チレン、メタクリル酸メチルなどを使用すること
ができる。このように木材に合成樹脂を含浸した
のちに、加熱加圧処理して合成樹脂を硬化させて
木材をWPC処理するものである。このとき例え
ば木材として単板を用い、この単板を合板などの
台板に突き板として接着して使用する場合には、
まず木材に120〜130℃程度の熱風を10〜20分間程
度吹き当てることによつて、木材に含浸させた合
成樹脂を半硬化（セミ硬化）させ、この単板を接
着剤を塗布した台板の表面に接着剤を介して積層
し、そしてこの状態で140〜150℃程度、10〜11
Kg／cm2程度、３分間程度の条件で加熱加圧をおこ
なうことによつて、合成樹脂の硬化と同時に台板
への単板の接着をおこなうことができることにな
る。 After infiltrating and fixing a coloring agent such as a dye or pigment into the conduit portion on the surface of the wood, the wood is placed in a pressure-adjusting pot such as a vacuum cooker, and the wood is heated using a vacuum method or a vacuum/pressurization method. Impregnate with synthetic resin. As the synthetic resin, those commonly used for WPC, such as unsaturated polyester-styrene and methyl methacrylate, can be used. After impregnating the wood with synthetic resin in this way, the wood is treated with WPC by heating and pressurizing the wood to harden the synthetic resin. At this time, for example, when using a veneer as the wood and gluing this veneer to a base plate such as plywood as a veneer,
First, by blowing hot air at about 120 to 130 degrees Celsius onto the wood for about 10 to 20 minutes, the synthetic resin impregnated into the wood is semi-cured, and this veneer is used as a base plate coated with adhesive. Laminated with adhesive on the surface of the
By applying heat and pressure under conditions of approximately Kg/cm 2 for approximately 3 minutes, the veneer can be bonded to the base plate at the same time as the synthetic resin is cured.
このようにして合成樹脂によつてWPC強化し、
蒸気による加熱加圧処理で全体を着色すると共に
着色液で導管部を着色した着色木材を得ることが
できるものである。このものにあつては木材の全
体は蒸気による加熱加圧処理で着色されるので、
染色の場合のような色のばらつきなく着色をおこ
なうことができることになる。そして導管部の着
色によつて導管模様すなわち木目模様を強調した
着色をおこなうことができることになるものであ
る。尚、着色液によつて木材を処理する際に、木
材の表面は導管部以外の部分においても着色され
ることがあり、この着色によつて銅導管様の強調
が薄れるおそれがあるが、このときには木材の表
面の着色層を研摩などで除去するようにすればよ
い。 In this way, WPC is reinforced with synthetic resin,
It is possible to obtain colored wood in which the entire wood is colored by heating and pressurizing treatment with steam, and the conduit portion is colored with a coloring liquid. In this case, the entire wood is colored by heat and pressure treatment using steam.
This means that coloring can be done without color variations unlike in the case of dyeing. By coloring the conduit portion, the conduit pattern, that is, the wood grain pattern, can be colored with emphasis. When treating wood with a colored liquid, the surface of the wood may be colored in areas other than the conduit area, and this coloring may reduce the emphasis on the appearance of copper conduits. In some cases, the colored layer on the surface of the wood may be removed by polishing or the like.
次ぎに本発明を実施例によつてさらに説明す
る。 Next, the present invention will be further explained by examples.
実施例 １
広葉樹ナラの１mm厚のロータリー単板を処理釜
に入れ、蒸気によつて140〜145℃、3.7〜4.5Kg／
cm2、30分の条件で加熱加圧処理し、単板を着色さ
せた。この単板を住友化学工業株式会社製染料
（スミノールミリングブラウン3G）の２％水溶液
中に10分間浸漬し、乾燥して単板の導管部に染料
を固定させた。次ぎにこの単板を減圧釜に入れ、
10Torr以下で１時間以上減圧排気をおこなつた
後、不飽和ポリエステル100重量部、スチレンモ
ンマー20重量部、ベンゾイルパーオキサイド
（BPO）２重量部の配合の合成樹脂を減圧釜に注
入して単板に合成樹脂を含浸し、このままの状態
で４時間放置した。４時間経過後減圧釜を常圧に
戻し、１時間放置したのちに単板を減圧釜から取
り出した。Example 1 A rotary veneer made of hardwood oak with a thickness of 1 mm was placed in a processing pot and heated to 140 to 145°C and 3.7 to 4.5 kg/kg by steam.
The veneer was colored by heat and pressure treatment under conditions of cm 2 and 30 minutes. This veneer was immersed for 10 minutes in a 2% aqueous solution of a dye (Sminol Milling Brown 3G) manufactured by Sumitomo Chemical Co., Ltd., and dried to fix the dye in the conduit portion of the veneer. Next, put this veneer in a vacuum cooker,
After evacuation at 10 Torr or less for more than 1 hour, pour a synthetic resin containing 100 parts by weight of unsaturated polyester, 20 parts by weight of styrene monomer, and 2 parts by weight of benzoyl peroxide (BPO) into a vacuum pot. The board was impregnated with synthetic resin and left as is for 4 hours. After 4 hours had elapsed, the vacuum pot was returned to normal pressure, and after being left for 1 hour, the veneer was taken out from the vacuum pot.
この単板を120〜130℃の熱風下に12分間置き、
単板に含浸した合成樹脂を半硬化させた。次い
で、接着剤を塗布した台板の上にこの単板を積層
し、140〜150℃、10〜11Kg／cm2、３分間の条件で
加熱加圧をおこない、単板に含浸した合成樹脂を
硬化させると同時に単板を台板に接着させた。 Place this veneer under hot air at 120-130℃ for 12 minutes,
The synthetic resin impregnated into the veneer was semi-cured. Next, this veneer was laminated on a base plate coated with adhesive, and heated and pressurized at 140-150℃, 10-11Kg/cm 2 for 3 minutes, and the synthetic resin impregnated into the veneer was applied. At the same time as it cured, the veneer was glued to the base plate.
このものにあつて、単板の全体の着色は均一に
おこなわれ、また導管模様が強調されて木目が際
立つたものであつた。 In this case, the entire veneer was colored uniformly, and the conduit pattern was emphasized, making the wood grain stand out.
実施例 ２
着色液として住友化学工業株式会社製染料（ス
ミノールミリングブラウン3G）を２重量部、
PEGMA（ポリエチレングリコールメチルアルコ
ール）を30重量部、水を70重量部の配合の水溶液
を用いるようにし、この水溶液に単板を10分間浸
漬したのちに95〜98℃の蒸気雰囲気中で２時間処
理することで、単板の導管部分に染料を固定する
ようにした他は、実施例１と同様にした。Example 2 As a coloring liquid, 2 parts by weight of a dye manufactured by Sumitomo Chemical Co., Ltd. (Sminol Milling Brown 3G),
An aqueous solution containing 30 parts by weight of PEGMA (polyethylene glycol methyl alcohol) and 70 parts by weight of water was used, and after immersing the veneer in this aqueous solution for 10 minutes, it was treated in a steam atmosphere at 95 to 98°C for 2 hours. The procedure was the same as in Example 1 except that the dye was fixed in the conduit portion of the veneer by doing this.
このものにあつても、単板の全体の着色は均一
におこなわれ、また導管模様が強調されて木目が
際立つたものであつた。 Even in this case, the coloring of the entire veneer was uniform, and the conduit pattern was emphasized, making the wood grain stand out.
実施例 ３
実施例２における着色液を単板の両面に100〜
120ｇ／m2（両面で）の塗布量でロールコーター
によつて塗布し、単板を積層して24時間以上放置
したのち乾燥させるようにした他は実施例１と同
様にした。Example 3 The coloring solution in Example 2 was applied to both sides of the veneer at a rate of 100~
The procedure of Example 1 was repeated except that the coating was applied using a roll coater at a coating weight of 120 g/m 2 (on both sides), and the veneers were laminated and allowed to stand for at least 24 hours before drying.
このものにあつても、単板の全体の着色は均一
におこなわれ、また導管模様が強調されて木目が
際立つたものであつた。 Even in this case, the coloring of the entire veneer was uniform, and the conduit pattern was emphasized, making the wood grain stand out.
実施例 ４
着色液として住友化学工業株式会社製染料（ス
ミノールミリングブラウン3G）の２％水溶液を
用い、これを単板の裏面側からフローコーターで
50〜60ｇ／m2の塗布量で塗布し、直ちに乾燥をお
こなうようにした他は、実施例１と同様にした。
ただし、台板への単板の着色は着色液の塗布面を
台板側に向けるようにしておこなつた。Example 4 A 2% aqueous solution of Sumitomo Chemical Co., Ltd. dye (Sminol Milling Brown 3G) was used as the coloring liquid, and this was applied from the back side of the veneer using a flow coater.
The procedure of Example 1 was repeated except that the coating was applied at a coating weight of 50 to 60 g/m 2 and dried immediately.
However, the coloring of the veneer onto the base plate was carried out with the surface to which the coloring liquid was applied facing the base plate side.
このものにあつても、単板の全体の着色は均一
におこなわれ、また導管模様が強調されて木目が
際立つたものであつた。またこのものでは、台板
に貼り付けた単板の表面は着色剤で着色された状
態になく、導管部のみが着色された状態にあるた
め、導管模様の強調による木目の際立ちが実施例
１乃至３のものより明確であつた。 Even in this case, the coloring of the entire veneer was uniform, and the conduit pattern was emphasized, making the wood grain stand out. In addition, in this case, the surface of the veneer attached to the baseboard is not colored with a coloring agent, and only the conduit portion is colored, so the wood grain stands out due to the emphasis of the conduit pattern in Example 1. It was clearer than those of 3 to 3.
［発明の効果］
上述のように本発明にあつては、木材を蒸気で
加圧加熱処理して木材を着色し、この木材を着色
液で処理して木材の導管部を着色し、しかるのち
に木材に合成樹脂を注入させて硬化させるように
したので、木材の全体は蒸気による加熱加圧処理
で着色されることになつて、染色の場合のような
色のばらつきなく着色をおこなうことができるも
のであり、また、蒸気で加圧加熱処理して着色し
た後に着色液で処理して導管部を着色し、その後
に木材に合成樹脂を注入硬化させという順序であ
るから、蒸気で加圧加熱処理して木材を飽水状態
にしておいて、着色液で処理することになるの
で、着色液の浸透過剰が防止され、導管部以外に
まで着色されることがなく、導管模様の強調が薄
れることがないものであり、また木材に含浸させ
るための合成樹脂には着色を施すような必要がな
く、WPCの圧力調整釜の台数に着色の色の種類
が限定されるようなこともないものである。そし
て着色液による導管部の着色によつて導管模様す
なわち木目模様を強調した着色をおこなうことが
できることになるものである。[Effects of the Invention] As described above, in the present invention, the wood is pressure-heated with steam to color the wood, the wood is treated with a coloring liquid to color the conduit portion of the wood, and then the wood is colored. Since synthetic resin was injected into the wood and cured, the entire wood was colored by heat and pressure treatment using steam, making it possible to color the wood without the unevenness of color that would occur with dyeing. In addition, the process involves applying pressure and heat treatment with steam to color it, then treating it with a coloring liquid to color the conduit, and then injecting synthetic resin into the wood and hardening it. Since the wood is heat-treated to saturate it with water and then treated with the coloring liquid, excessive penetration of the coloring liquid is prevented, and areas other than the conduit areas are not colored, and the conduit pattern is emphasized. It does not fade, there is no need to color the synthetic resin used to impregnate the wood, and the type of color is not limited by the number of WPC pressure adjustment pots. It is something. By coloring the conduit portion with the colored liquid, it is possible to perform coloring that emphasizes the conduit pattern, that is, the wood grain pattern.
Claims (1)
し、この木材を着色液で処理して木材の導管部を
着色し、しかるのちに木材に合成樹脂を注入させ
て硬化させることを特徴とする着色木材の製造方
法。1 The wood is colored by applying pressure and heat treatment to the wood with steam, the wood is treated with a coloring liquid to color the conduit part of the wood, and then a synthetic resin is injected into the wood to harden it. A method for producing colored wood.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13858885A JPS61295004A (en) | 1985-06-25 | 1985-06-25 | Manufacture of colored wood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13858885A JPS61295004A (en) | 1985-06-25 | 1985-06-25 | Manufacture of colored wood |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61295004A JPS61295004A (en) | 1986-12-25 |
| JPH0544321B2 true JPH0544321B2 (en) | 1993-07-06 |
Family
ID=15225615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13858885A Granted JPS61295004A (en) | 1985-06-25 | 1985-06-25 | Manufacture of colored wood |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61295004A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0323901A (en) * | 1989-06-20 | 1991-01-31 | Takehito Kato | Manufacture of processed wood |
| JP7117495B2 (en) * | 2018-04-18 | 2022-08-15 | パナソニックＩｐマネジメント株式会社 | Resin-containing wood material and its manufacturing method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56154012A (en) * | 1980-04-29 | 1981-11-28 | Hiyougo Izumi | Method of making winter grain of wood clear |
| JPS606762A (en) * | 1983-06-25 | 1985-01-14 | Seitetsu Kagaku Co Ltd | Polyethylene coating composition |
-
1985
- 1985-06-25 JP JP13858885A patent/JPS61295004A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56154012A (en) * | 1980-04-29 | 1981-11-28 | Hiyougo Izumi | Method of making winter grain of wood clear |
| JPS606762A (en) * | 1983-06-25 | 1985-01-14 | Seitetsu Kagaku Co Ltd | Polyethylene coating composition |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61295004A (en) | 1986-12-25 |
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