JP3727804B2 - Method for producing woody synthetic resin composition - Google Patents

Method for producing woody synthetic resin composition Download PDF

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JP3727804B2
JP3727804B2 JP08103499A JP8103499A JP3727804B2 JP 3727804 B2 JP3727804 B2 JP 3727804B2 JP 08103499 A JP08103499 A JP 08103499A JP 8103499 A JP8103499 A JP 8103499A JP 3727804 B2 JP3727804 B2 JP 3727804B2
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synthetic resin
parts
wood flour
resin composition
wood
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JP2000271909A (en
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清純 佐藤
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Sekisui Jushi Corp
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Sekisui Jushi Corp
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Description

【０００１】
【発明の属する技術分野】
本発明は、オレフィン系合成樹脂と木粉からなる木質合成樹脂組成物の製造方法に関する。
【０００２】
【従来の技術】
従来、合成樹脂に木粉を添加し合成樹脂成型品に木肌を付与する方法としては、ポリ塩化ビニル樹脂に木粉を添加したものがよく知られている。例えば特開平１０２３１４０５号公報には、「組成物（Ａ）８０〜９９重量％及び組成物（Ｂ）２０〜１重量％とを含有する塩化ビニル樹脂組成物であって、上記組成物（Ａ）は平均重合度が７００〜１２００の塩化ビニル樹脂（ａ）１００重量部、液状可塑剤２５〜６０重量部、含水率が５重量％以下で平均粒径が３０〜５００μｍである木粉１０〜１００重量部、及びアクリル系加工助剤１〜１０重量部とからなり、上記組成物（Ｂ）は、平均重合度が前記塩化ビニル樹脂（ａ）よりも１００〜５００高い塩化ビニル樹脂（ｂ）１００重量部、組成物（Ａ）より０〜２０重量部少ない液状可塑剤、含水率が５重量％以下で平均粒径が３０〜５００μｍである木粉１０〜１００重量部、アクリル系加工助剤１〜１０重量部、及び有色顔料０．５〜６重量部とからなることを特徴とする。」塩化ビニル樹脂組成物が提案されている。
【０００３】
【発明が解決しようとする課題】
しかしながら上記の如き塩化ビニル樹脂組成物は、耐光性、接着性に優れているものの、製品の廃棄に際して、焼却処分をすると、塩素ガスやダイオキシンが発生し公害となるという問題があった。又、この問題に着目して、オレフィン系の合成樹脂に木粉を混合し製品廃棄寺の問題を解消することも検討されたが、木粉の流動性や分散性が悪く、木粉とオレフィン系合成樹脂とのなじみが悪く、成型品が所要の強度が得られないという問題があった。
【０００４】
そこで本発明者は従来の欠点に鑑み鋭意研究の結果、木粉の流動性、分散性の向上を図り、成型品が所要の強度を得られる合成樹脂組成物を提供するものである。
【０００５】
【課題を解決するための手段】
本発明請求項１記載の木質合成樹脂組成物の製造方法は、攪拌衝撃翼を装備するミキサーに木粉と樹脂改質剤を投入して攪拌衝撃翼を回転させ、この攪拌衝撃翼の回転により、木粉に発生する摩擦熱により木粉を乾燥させ且つ樹脂改質剤をゲル化させると共に、該樹脂改質剤と木粉とを混練し、次いでそれを冷却して得られた混練物とオレフィン系合成樹脂とを混合し、該混合物を押し出し成形するものであって、前記混合物の配合を、オレフィン系合成樹脂１００部に対して、木粉５〜２００部、樹脂改質剤１〜２０部とすることを特徴とするもので、樹脂改質剤により木粉の流動性、分散性が向上され、木粉とオレフィン系合成樹脂のなじみが良好となり、成型品の強度が強化される。本発明において木粉はオレフィン系合成樹脂１００部に対して５〜２００部配合される。木粉が５部未満では木質感がでにくく、２００部を超えると成形性に問題があるためである。又樹脂改質剤はオレフィン系合成樹脂１００部に対して１〜２０部配合される。樹脂改質剤が１部未満では樹脂改質剤の効果がほとんどなく、２０部を超えると合成樹脂組成物から製造される成型品の剛性が不足するためである。本発明に於ける樹脂改質剤とは、無水マレイン酸変性ポリオレフィンやアクリル酸変性ポリオレフィンなどの変性ポリオレフィン、エチレン−酢酸ビニル系改質剤、アニオン系イオン活性剤や非イオン系活性剤や両性活性剤などの界面活性剤などのオレフィン系合成樹脂の改質剤のことをいう。
【０００６】
本発明請求項２記載の木質合成樹脂組成物は無水マレイン酸をオレフィン系合成樹脂にグラフト重合させた変性ポリオレフィンを樹脂改質剤としたもので、アクリル酸変性ポリオレフィンなどの他の酸変性ポリオレフィンに比べて変性度が高く、且つ溶融粘度が低いことから、合成樹脂への木粉の分散性、密着性及び成形性の向上に優れた効果がある。
【０００７】
上記のように、本発明請求項１記載の木質合成樹脂組成物の製造方法は、攪拌衝撃翼を装備するミキサーに木粉と樹脂改質剤を投入して攪拌衝撃翼を回転させ、この攪拌衝撃翼の回転により、木粉に発生する摩擦熱により木粉を乾燥させ且つ樹脂改質剤をゲル化させると共に、該樹脂改質剤と木粉とを混練し、次いでそれを冷却して得られた混練物とオレフィン系合成樹脂とを混合し、該混合物を押し出し成形するものであって、前記混合物の配合を、オレフィン系合成樹脂１００部に対して、木粉５〜２００部、樹脂改質剤１〜２０部とすることを特徴とするもので、オレフィン系合成樹脂と木粉のなじみがよく、木粉の分散性、流動性が改善され、成型安定性が向上し、好適な木質合成樹脂組成物が得られる。
【０００８】
本発明請求項３記載の木質合成樹脂組成物の製造方法は、乾燥された木粉の含有水分量が０．１〜１％となるように攪拌衝撃翼の回転速度と混合時間を制御するものであり、木質合成樹脂組成物は木粉の含有水分量が０．１〜１％となされているので、発泡による成型品の空洞の発生が無く好適な成型品が得られる。木粉の含有水分量が１％を超えると整形時に発泡しやすく成型品断面に空洞が発生しやすく、成型品の形状が不安定となり、又成型金型が腐食し易いという問題がある。木粉の含有水分量が０．１％未満では成型上の問題はないものの木粉乾燥時に粉塵爆発することがあり、安全面での問題がある。
【０００９】
上記のように、本発明請求項３記載の木質合成樹脂組成物の製造方法は、乾燥された木粉の含有水分量が０．１〜１％となるように攪拌衝撃翼の回転速度と混合時間を制御するもので、木粉の乾燥と木粉と樹脂改質剤の混合を同時にでき、生産性がよく、乾燥した木粉の吸湿が無く、好適な木質合成樹脂組成物が得られる。
【００１０】
【発明の実施の形態】
以下、図面を参照しながら本発明に付いて説明する。
図１は本発明木質合成樹脂組成物の製造に用いられるミキサーの一例であり、円筒形の容器の底部中央に回転軸１が設けられ、この回転軸１に平面視等角度で６枚の羽が設けられて攪拌衝撃翼２となされている。この容器の上部から、木粉と樹脂改質剤が投入され、攪拌衝撃翼２が高速で回転されることにより木粉が乾燥されるとともに樹脂改質剤がゲル化され、木粉と樹脂改質剤が混練される。
【００１１】
ミキサーの円筒形の容器の中心に回転軸１が設けられ、この回転軸１に下からスクレイパー３、攪拌衝撃翼２が挿通され、ナットが回転軸１にねじ込まれて、取り付けられている。攪拌衝撃翼２は回転軸１を中心に対称形の２枚羽が３枚重ねられて、６枚の羽となされている。スクレイパー３は円筒形の容器の底部から僅かに隙間を空けて設けられ、混練された材料が容器の底部に付着しないようになされている。
【００１２】
木粉と樹脂改質剤がゲル化混練された材料は次にクーリングミキサーに投入され、材料が塊にならないように冷却される。クーリングミキサーは図２に示すように円筒形の容器の中心に回転軸１１が設けられ、この回転軸１１に羽２１が挿通され、ナットが回転軸１１にねじ込まれて取り付けられている。
【００１３】
前記ミキサーに木粉及び樹脂改質剤を投入、攪拌衝撃翼２を高速で回転させ、この攪拌衝撃翼２の回転により木粉に衝撃が加えられ、木粉に摩擦熱が発生する。この熱により木粉が乾燥されるとともに、樹脂改質剤がゲル化されて木粉と樹脂改質剤が混練される。表１にこの混練プロセスに於ける混練材料の温度と木粉の含水率の推移を示す。
【表１】

Figure 0003727804
【００１４】
前記の処理により作製された処理木粉がＨＤＰＥと混合された木質合成樹脂組成物が押出機で成形された成型品についての実施例を示す。本実施例に於いては、木粉は＃８０のベイツガ木粉を用いた。又、樹脂改質剤としてマレイン酸変性ポリエチレンを用いた。本実施例に於ける処理木粉は前記木粉３０部と樹脂改質剤２部を前記したミキサーで混練したものである。
【００１５】
【実施例】
実施例１
ＨＤＰＥ１００部に含有水分率０．４８％の処理木粉３２部を混合、２軸押出機で押し出し成形した。
実施例２
ＨＤＰＥ１００部に含有水分率０．４８％の処理木粉３２部及びクレー１５部を混合、２軸押出機で押し出し成形した。
実施例３
ＨＤＰＥ１００部に含有水分率１．０３％の処理木粉３２部を混合、２軸押出機で押し出し成形した。
実施例４
ＨＤＰＥ１００部に含有水分率０．５１％の木粉３０部及びマレイン酸変性ポリエチレン２部を混合、２軸押出機で押し出し成形した。
比較例１
ＨＤＰＥ１００部に含有水分率０．５１％の木粉３０部を混合、２軸押出機で押し出し成形した。
【００１６】
上記実施例及び比較例での成形性及び押出成形された成型品の物性を以下の表に示す。
【表２】
Figure 0003727804
【００１７】
【発明の効果】
上述の如く、本発明請求項１記載の木質合成樹脂組成物の製造方法は、攪拌衝撃翼を装備するミキサーに木粉と樹脂改質剤を投入して攪拌衝撃翼を回転させ、この攪拌衝撃翼の回転により、木粉に発生する摩擦熱により木粉を乾燥させ且つ樹脂改質剤をゲル化させると共に、該樹脂改質剤と木粉とを混練し、次いでそれを冷却して得られた混練物とオレフィン系合成樹脂とを混合し、該混合物を押し出し成形するものであって、前記混合物の配合を、オレフィン系合成樹脂１００部に対して、木粉５〜２００部、樹脂改質剤１〜２０部とすることを特徴とするもので、樹脂改質剤により木粉の流動性、分散性が向上され、木粉とオレフィン系合成樹脂のなじみが良好となり、成型品の強度が強化される。
【００１８】
本発明請求項２記載の木質合成樹脂組成物は無水マレイン酸をオレフィン系合成樹脂にグラフト重合させた変性ポリオレフィンを樹脂改質剤としたもので、アクリル酸変性ポリオレフィンなどの他の酸変性ポリオレフィンに比べて変性度が高く、且つ溶融粘度が低いことから、合成樹脂への木粉の分散性、密着性及び成形性の向上に優れた効果がある。
【００１９】
上記のように、発明請求項１記載の木質合成樹脂組成物の製造方法は、攪拌衝撃翼を装備するミキサーに木粉と樹脂改質剤を投入して攪拌衝撃翼を回転させ、この攪拌衝撃翼の回転により、木粉に発生する摩擦熱により木粉を乾燥させ且つ樹脂改質剤をゲル化させると共に、該樹脂改質剤と木粉とを混練し、次いでそれを冷却して得られた混練物とオレフィン系合成樹脂とを混合し、該混合物を押し出し成形するものであって、前記混合物の配合を、オレフィン系合成樹脂１００部に対して、木粉５〜２００部、樹脂改質剤１〜２０部とすることを特徴とするもので、オレフィン系合成樹脂と木粉のなじみがよく、木粉の分散性、流動性が改善され、成型安定性が向上し、好適な木質合成樹脂組成物が得られる。
【００２０】
本発明請求項３記載の木質合成樹脂組成物の製造方法は、乾燥された木粉の含有水分量が０．１〜１％となるように攪拌衝撃翼の回転速度と混合時間を制御するものであり、木質合成樹脂組成物は木粉の含有水分量が０．１〜１％となされているので、発泡による成型品の空洞の発生が無く好適な成型品が得られる。
【００２１】
上記のように、本発明請求項３記載の木質合成樹脂組成物の製造方法は、乾燥された木粉の含有水分量が０．１〜１％となるように攪拌衝撃翼の回転速度と混合時間を制御するもので、木粉の乾燥と木粉と樹脂改質剤の混合を同時にでき、生産性がよく、乾燥した木粉の吸湿が無く、好適な木質合成樹脂組成物が得られる。
【図面の簡単な説明】
【図１】本発明木質合成樹脂組成物の製造に用いられるミキサーを示す断面図である。
【図２】本発明木質合成樹脂組成物の製造に用いられるクーリングミキサーを示す断面図である。
【符号の説明】
１ 回転軸
２ 攪拌衝撃翼
３ スクレイパー
１１ 回転軸
２１ 羽[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing a woody synthetic resin composition comprising an olefinic synthetic resin and wood flour.
[0002]
[Prior art]
Conventionally, as a method of adding wood powder to a synthetic resin and imparting a bark to a synthetic resin molded product, a method in which wood powder is added to a polyvinyl chloride resin is well known. For example, Japanese Patent Laid-Open No. 10231405 discloses a vinyl chloride resin composition containing “composition (A) 80 to 99% by weight and composition (B) 20 to 1% by weight, wherein the composition (A) Is 100 to 100 parts by weight of vinyl chloride resin (a) having an average degree of polymerization of 700 to 1200, 25 to 60 parts by weight of a liquid plasticizer, 10 to 100 of wood flour having a water content of 5% by weight or less and an average particle size of 30 to 500 μm. It consists of 1 part by weight and 1 to 10 parts by weight of an acrylic processing aid, and the composition (B) has an average degree of polymerization of 100 to 500 higher than that of the vinyl chloride resin (a). Parts by weight, liquid plasticizer of 0 to 20 parts by weight less than composition (A), 10 to 100 parts by weight of wood flour having a water content of 5% by weight or less and an average particle size of 30 to 500 μm, acrylic processing aid 1 -10 parts by weight, and colored pigments 0. It is characterized by comprising 5 to 6 parts by weight. "Vinyl chloride resin compositions have been proposed.
[0003]
[Problems to be solved by the invention]
However, although the vinyl chloride resin composition as described above is excellent in light resistance and adhesiveness, there is a problem in that chlorine gas and dioxin are generated and polluted when incinerated when the product is discarded. Focusing on this problem, it was also considered to mix the wood powder with the olefin-based synthetic resin to solve the problem of the product disposal temple. However, the fluidity and dispersibility of the wood powder are poor, and the wood powder and the olefin There was a problem that the familiarity with the synthetic resin was poor and the molded product could not obtain the required strength.
[0004]
Therefore, the present inventor intends to improve the fluidity and dispersibility of wood flour as a result of intensive studies in view of the conventional drawbacks, and to provide a synthetic resin composition in which a molded product can obtain a required strength.
[0005]
[Means for Solving the Problems]
In the method for producing a woody synthetic resin composition according to the first aspect of the present invention , wood powder and a resin modifier are added to a mixer equipped with a stirring impact blade, and the stirring impact blade is rotated. A kneaded product obtained by drying the wood powder by the frictional heat generated in the wood powder and gelling the resin modifier, kneading the resin modifier and the wood powder, and then cooling it. An olefin-based synthetic resin is mixed and the mixture is extruded, and the blend of the mixture is based on 100 parts of olefin-based synthetic resin, 5 to 200 parts of wood flour, and resin modifiers 1 to 20 The resin modifier improves the fluidity and dispersibility of the wood flour, improves the familiarity between the wood flour and the olefin synthetic resin, and enhances the strength of the molded product. In the present invention, the wood flour is blended in an amount of 5 to 200 parts per 100 parts of the olefin synthetic resin. This is because if the wood powder is less than 5 parts, the wood texture is difficult to produce, and if it exceeds 200 parts, there is a problem in moldability. The resin modifier is blended in an amount of 1 to 20 parts per 100 parts of the olefin synthetic resin. If the resin modifier is less than 1 part, there is almost no effect of the resin modifier, and if it exceeds 20 parts, the rigidity of the molded product produced from the synthetic resin composition is insufficient. The resin modifier in the present invention is a modified polyolefin such as maleic anhydride modified polyolefin or acrylic acid modified polyolefin, an ethylene-vinyl acetate modifier, an anionic ionic activator, a nonionic activator or an amphoteric activity. It means a modifier for olefinic synthetic resins such as surfactants.
[0006]
The woody synthetic resin composition according to claim 2 of the present invention uses a modified polyolefin obtained by graft polymerization of maleic anhydride on an olefinic synthetic resin as a resin modifier, and can be used for other acid-modified polyolefins such as acrylic acid-modified polyolefins. Since the degree of modification is high and the melt viscosity is low, there is an effect of improving the dispersibility, adhesion and moldability of the wood flour to the synthetic resin.
[0007]
As described above, in the method for producing a woody synthetic resin composition according to claim 1 of the present invention , wood powder and a resin modifier are added to a mixer equipped with a stirring impact blade, and the stirring impact blade is rotated. By rotating the impact blade, the wood powder is dried by the frictional heat generated in the wood powder and the resin modifier is gelled, and the resin modifier and the wood powder are kneaded and then cooled. The kneaded product and the olefin-based synthetic resin are mixed and the mixture is extruded, and the mixture is blended into 100 parts of the olefin-based synthetic resin, 5 to 200 parts of wood flour, and resin modified. It is characterized by being 1 to 20 parts of the quality agent, and the familiarity of the olefin synthetic resin and the wood powder is good, the dispersibility and fluidity of the wood powder are improved, the molding stability is improved, and the suitable wood quality A synthetic resin composition is obtained.
[0008]
The method for producing a woody synthetic resin composition according to claim 3 of the present invention controls the rotational speed and mixing time of the stirring impact blade so that the moisture content of the dried wood flour is 0.1 to 1%. In the woody synthetic resin composition, the moisture content of the wood powder is 0.1 to 1%, so that there is no generation of voids in the molded product due to foaming, and a suitable molded product is obtained. If the moisture content of the wood powder exceeds 1%, foaming tends to occur at the time of shaping, and cavities are likely to be generated in the cross section of the molded product, the shape of the molded product becomes unstable, and the molding die tends to corrode. If the moisture content of the wood powder is less than 0.1%, there is no problem in molding, but dust explosion may occur when the wood powder is dried, which is a safety problem.
[0009]
As described above, the method for producing a woody synthetic resin composition according to claim 3 of the present invention is mixed with the rotational speed of the stirring impact blade so that the moisture content of the dried wood flour is 0.1 to 1%. Controlling the time, the drying of the wood flour and the mixing of the wood flour and the resin modifier can be performed simultaneously, the productivity is good, the dried wood flour does not absorb moisture, and a suitable woody synthetic resin composition is obtained.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to the drawings.
FIG. 1 shows an example of a mixer used in the production of the woody synthetic resin composition of the present invention. A rotating shaft 1 is provided at the center of the bottom of a cylindrical container, and six blades are equiangularly viewed from above on the rotating shaft 1. Is provided as the stirring impact blade 2. From the upper part of this container, wood powder and a resin modifier are introduced, and the stirring impact blade 2 is rotated at a high speed, whereby the wood powder is dried and the resin modifier is gelled. The material is kneaded.
[0011]
A rotating shaft 1 is provided at the center of a cylindrical container of the mixer, and a scraper 3 and a stirring impact blade 2 are inserted into the rotating shaft 1 from below, and a nut is screwed into the rotating shaft 1 and attached. The agitation impact blade 2 is composed of two symmetric two wings with the rotating shaft 1 as the center to form six wings. The scraper 3 is provided with a slight gap from the bottom of the cylindrical container so that the kneaded material does not adhere to the bottom of the container.
[0012]
The material in which the wood flour and the resin modifier are gelled and kneaded is then put into a cooling mixer and cooled so that the material does not become a lump. As shown in FIG. 2, the cooling mixer is provided with a rotating shaft 11 at the center of a cylindrical container. A blade 21 is inserted through the rotating shaft 11, and a nut is screwed into the rotating shaft 11.
[0013]
Wood powder and a resin modifier are added to the mixer, and the stirring impact blade 2 is rotated at a high speed. The rotation of the stirring impact blade 2 causes impact to the wood powder, and friction heat is generated in the wood powder. The wood powder is dried by this heat, the resin modifier is gelled, and the wood powder and the resin modifier are kneaded. Table 1 shows the transition of the temperature of the kneaded material and the moisture content of the wood flour in this kneading process.
[Table 1]
Figure 0003727804
[0014]
The Example about the molded article by which the woody synthetic resin composition by which the process wood powder produced by the said process was mixed with HDPE was shape | molded with the extruder is shown. In this example, # 80 Batesuga wood flour was used as the wood flour. In addition, maleic acid-modified polyethylene was used as a resin modifier. The treated wood flour in this example is obtained by kneading 30 parts of the wood flour and 2 parts of the resin modifier with the mixer described above.
[0015]
【Example】
Example 1
32 parts of treated wood flour having a water content of 0.48% was mixed with 100 parts of HDPE, and extruded using a twin screw extruder.
Example 2
100 parts of HDPE was mixed with 32 parts of treated wood flour having a moisture content of 0.48% and 15 parts of clay, and extruded using a twin screw extruder.
Example 3
32 parts of treated wood flour having a moisture content of 1.03% was mixed with 100 parts of HDPE, and extruded using a twin screw extruder.
Example 4
100 parts of HDPE was mixed with 30 parts of wood powder having a moisture content of 0.51% and 2 parts of maleic acid-modified polyethylene, and extruded using a twin screw extruder.
Comparative Example 1
100 parts of HDPE was mixed with 30 parts of wood flour having a moisture content of 0.51%, and extruded using a twin screw extruder.
[0016]
The table below shows the moldability in the above examples and comparative examples, and the physical properties of the molded articles obtained by extrusion molding.
[Table 2]
Figure 0003727804
[0017]
【The invention's effect】
As described above, in the method for producing a woody synthetic resin composition according to claim 1 of the present invention , wood powder and a resin modifier are added to a mixer equipped with a stirring impact blade, and the stirring impact blade is rotated. It is obtained by drying the wood flour and gelling the resin modifier by frictional heat generated in the wood flour by rotating the blades, kneading the resin modifier and the wood flour, and then cooling it. The kneaded product and the olefin synthetic resin are mixed, and the mixture is extruded. The blend of the mixture is 5 to 200 parts of wood flour with respect to 100 parts of the olefin synthetic resin. 1-20 parts of the agent , the resin modifier improves the fluidity and dispersibility of the wood flour, the familiarity between the wood flour and the olefin synthetic resin is good, and the strength of the molded product is Strengthened.
[0018]
The woody synthetic resin composition according to claim 2 of the present invention uses a modified polyolefin obtained by graft polymerization of maleic anhydride on an olefinic synthetic resin as a resin modifier, and can be used for other acid-modified polyolefins such as acrylic acid-modified polyolefins. Since the degree of modification is high and the melt viscosity is low, there is an effect of improving the dispersibility, adhesion and moldability of the wood flour to the synthetic resin.
[0019]
As described above, the method for producing a woody synthetic resin composition according to the first aspect of the present invention is such that wood powder and a resin modifier are charged into a mixer equipped with a stirring impact blade and the stirring impact blade is rotated. It is obtained by drying the wood flour and gelling the resin modifier by frictional heat generated in the wood flour by rotating the blades, kneading the resin modifier and the wood flour, and then cooling it. The kneaded product and the olefin synthetic resin are mixed, and the mixture is extruded. The blend of the mixture is 5 to 200 parts of wood flour with respect to 100 parts of the olefin synthetic resin. 1 to 20 parts of the agent, the familiarity of the olefin synthetic resin and the wood flour is good, the dispersibility and fluidity of the wood flour is improved, the molding stability is improved, and a suitable wood synthesis A resin composition is obtained.
[0020]
The method for producing a woody synthetic resin composition according to claim 3 of the present invention controls the rotational speed and mixing time of the stirring impact blade so that the moisture content of the dried wood flour is 0.1 to 1%. In the woody synthetic resin composition, the moisture content of the wood powder is 0.1 to 1%, so that there is no generation of voids in the molded product due to foaming, and a suitable molded product is obtained.
[0021]
As described above, the method for producing a woody synthetic resin composition according to claim 3 of the present invention is mixed with the rotational speed of the stirring impact blade so that the moisture content of the dried wood flour is 0.1 to 1%. Controlling the time, the drying of the wood flour and the mixing of the wood flour and the resin modifier can be performed simultaneously, the productivity is good, the dried wood flour does not absorb moisture, and a suitable woody synthetic resin composition is obtained.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a mixer used in the production of the woody synthetic resin composition of the present invention.
FIG. 2 is a cross-sectional view showing a cooling mixer used for producing the woody synthetic resin composition of the present invention.
[Explanation of symbols]
1 Rotating shaft 2 Stirring impact blade 3 Scraper 11 Rotating shaft 21 Wings

Claims (3)

攪拌衝撃翼を装備するミキサーに木粉と樹脂改質剤を投入して攪拌衝撃翼を回転させ、この攪拌衝撃翼の回転により、木粉に発生する摩擦熱により木粉を乾燥させ且つ樹脂改質剤をゲル化させると共に、該樹脂改質剤と木粉とを混練し、次いでそれを冷却して得られた混練物とオレフィン系合成樹脂とを混合し、該混合物を押し出し成形するものであって、前記混合物の配合を、オレフィン系合成樹脂１００部に対して、木粉５〜２００部、樹脂改質剤１〜２０部とすることを特徴とする木質合成樹脂組成物の製造方法。  A mixer equipped with a stirring impact blade is charged with wood powder and a resin modifier, and the stirring impact blade is rotated. The resin modifier and the wood flour are kneaded together, and then the kneaded product obtained by cooling it and the olefin synthetic resin are mixed, and the mixture is extruded. The method for producing a woody synthetic resin composition is characterized in that the mixture is mixed in an amount of 5 to 200 parts of wood flour and 1 to 20 parts of a resin modifier with respect to 100 parts of the olefinic synthetic resin. 無水マレイン酸をオレフィン系合成樹脂にグラフト重合させた変性ポリオレフィンを樹脂改質剤としたことを特徴とする請求項１記載の木質合成樹脂組成物の製造方法。The method for producing a woody synthetic resin composition according to claim 1, wherein a modified polyolefin obtained by graft polymerization of maleic anhydride onto an olefinic synthetic resin is used as a resin modifier. 乾燥された木粉の含有水分量が０．１〜１％となるように攪拌衝撃翼の回転速度と混合時間を制御することを特徴とする請求項１又は２に記載の木質合成樹脂組成物の製造方法。  The woody synthetic resin composition according to claim 1 or 2, wherein the rotational speed and mixing time of the stirring impact blade are controlled so that the moisture content of the dried wood flour is 0.1 to 1%. Manufacturing method.
JP08103499A 1999-03-25 1999-03-25 Method for producing woody synthetic resin composition Expired - Lifetime JP3727804B2 (en)

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