JP3126951B2 - Woody resin structure - Google Patents
Woody resin structureInfo
- Publication number
- JP3126951B2 JP3126951B2 JP10210296A JP21029698A JP3126951B2 JP 3126951 B2 JP3126951 B2 JP 3126951B2 JP 10210296 A JP10210296 A JP 10210296A JP 21029698 A JP21029698 A JP 21029698A JP 3126951 B2 JP3126951 B2 JP 3126951B2
- Authority
- JP
- Japan
- Prior art keywords
- layer
- resin
- woody
- weight
- thickness
- 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
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- Laminated Bodies (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Molding Of Porous Articles (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
【0001】[0001]
【発明の属する技術分野】本発明は、木質様の表面を持
つ木質樹脂構造体に関する。TECHNICAL FIELD The present invention relates to a wood resin structure having a wood-like surface.
【0002】[0002]
【従来の技術】木目模様を有した熱可塑性樹脂の成形品
は、既に市販されており、長い歴史を有している。しか
し、触感あるいは視覚による木質感には程遠かった。2. Description of the Related Art Molded thermoplastic resins having a grain pattern are already commercially available and have a long history. However, it was far from tactile or visual woody feel.
【0003】近年、リサイクル気運の高まりから、オガ
粉等の木粉を熱可塑性樹脂と複合させた木質感を持った
素材の開発が盛んになってきている。しかしながら、こ
れらの素材は、曲げ加工が困難であるとか、重いなどの
欠点を有している。[0003] In recent years, the development of materials having a woody texture, in which wood flour such as sawdust is combined with a thermoplastic resin, has been actively developed due to an increase in recycling tendency. However, these materials have drawbacks such as difficulty in bending and heavy weight.
【0004】上記の欠点を解決するために、肉厚を薄く
して、成形品の裏打ち材としてMDFや木材を貼り付け
る方法がある。該方法においては、薄肉にすることで曲
げ加工性は得られるが、接着剤が必要であり、また、M
DFや木材の別加工が必要であることからコスト高にな
るという欠点がある。[0004] In order to solve the above-mentioned drawbacks, there is a method of reducing the wall thickness and attaching MDF or wood as a backing material of a molded product. In this method, bending workability can be obtained by reducing the thickness, but an adhesive is required.
There is a disadvantage that the cost is increased due to the necessity of separate processing of DF and wood.
【0005】一方、従来から、偏肉部を有する異型押出
成形品においては、反りが出やすいという欠点があっ
た。例えば、L字形をした成形品であって各辺の肉厚が
異なるものの場合、成形収縮が肉厚によって異なること
から、押出成形した製品の反りが大きいという欠点があ
った。[0005] On the other hand, conventionally, a profile extruded product having an uneven thickness portion has a drawback that warpage tends to occur. For example, in the case of an L-shaped molded product having different thicknesses on each side, there is a drawback that the extruded product has a large warp because the molding shrinkage varies depending on the thickness.
【0006】[0006]
【発明が解決しようとする課題】本発明は、視覚的に木
に類似した外観を有するばかりではなく、軽量で木の触
感を持ち、かつ良好な曲げ加工性及び高いネジの引き抜
き強度を兼ね備え、更には、偏肉部を有しても反りを殆
ど生じないところの木質樹脂構造体を提供するものであ
る。SUMMARY OF THE INVENTION The present invention not only has a visual appearance similar to wood, but also has a light weight, a tactile feel to wood, and has good bending workability and high screw pull-out strength. Still another object of the present invention is to provide a woody resin structure in which warpage hardly occurs even if it has an uneven thickness portion.
【0007】[0007]
【課題を解決するための手段】本発明者は、上記課題を
解決すべく種々の検討を行った。その結果、下記所定の
層(A)及び層(B)を有する木質樹脂構造体におい
て、上記の課題を全て解決し得ることを見出し、本発明
を完成するに至った。The present inventor has made various studies to solve the above-mentioned problems. As a result, they have found that a woody resin structure having the following predetermined layers (A) and (B) can solve all of the above problems, and have completed the present invention.
【0008】即ち、本発明は、 (1)芯部と該芯部を包囲する鞘部とから成る木質樹脂
構造体であって、該鞘部がセルロース系粉粒体30〜6
0重量部及び熱可塑性樹脂70〜40重量部を含む樹脂
組成物から成る層(A)であり、該芯部が熱可塑性樹脂
を含む発泡層(B)であり、層(A)の厚みが10mm以
下かつ発泡層(B)の厚み以下であり、更に、発泡層
(B)の発泡倍率が1.2〜5.0であるところの木質
樹脂構造体である。That is, the present invention provides: (1) a woody resin structure comprising a core portion and a sheath portion surrounding the core portion, wherein the sheath portion is a cellulosic powder material 30 to 6;
A layer (A) comprising a resin composition containing 0 parts by weight and 70 to 40 parts by weight of a thermoplastic resin, wherein the core is a foamed layer (B) containing a thermoplastic resin, and the thickness of the layer (A) is It is a woody resin structure having a thickness of 10 mm or less and a thickness of the foamed layer (B) or less, and a foaming ratio of the foamed layer (B) of 1.2 to 5.0.
【0009】本発明者は、第一に、従来から知られてい
るオガ粉等の木粉を熱可塑性樹脂と複合させた素材の欠
点、即ち、曲げ加工性が悪い、重いなどの欠点を解決す
べく、該素材中に発泡剤を添加して熱可塑性樹脂を発泡
せしめる方法を試みた。しかし、木粉の量が20重量%
以上では発泡ガスが木粉と樹脂との間隙を抜けてしま
い、発泡し難くかったり、あるいは木目模様を出すため
の着色マスターバッチの流れが乱れるため表面の木目模
様の鮮明さが低下するなどの問題が生じた。一方、木粉
の量が少なければ、発泡は比較的容易ではあったが良好
な木質の触感が得られなかった。そこで、第二に、素材
の木質感を損なわぬよう木粉等のセルロース系粉粒体の
量を所定量に保ちつつ、軽量で、かつ良好な曲げ加工性
及び高いネジの引き抜き強度を兼ね備え、更には反りを
生じない木質樹脂構造体を得るべく検討した。その結
果、セルロース系粉粒体を含む層(A)の厚みを比較的
薄い上記所定値とし、かつ補強層を所定の発泡倍率を持
つ発泡層(B)とし、かつ層(A)と発泡層(B)の厚
みを所定の関係に保てば、驚くべきことに上記全ての特
質を兼ね備えた木質樹脂構造体が得られることを見出し
たのである。かかる木質樹脂構造体は、好ましくは層
(A)と発泡層(B)を共押出しすることにより成形す
ることができるため、接着剤及び補強材の別加工が不要
であり経済性の面においても非常に優れている。The inventor of the present invention firstly solves the disadvantages of a conventionally known material obtained by combining wood powder such as sawdust powder with a thermoplastic resin, that is, the disadvantages such as poor bending workability and heavy weight. To this end, a method was attempted in which a foaming agent was added to the material to foam the thermoplastic resin. However, the amount of wood flour is 20% by weight.
Above, the foaming gas escapes the gap between the wood flour and the resin, making it difficult to foam, or the flow of the coloring master batch for producing the wood grain pattern is disturbed, so that the sharpness of the grain pattern on the surface decreases A problem arose. On the other hand, if the amount of wood flour was small, foaming was relatively easy, but good woody touch was not obtained. Therefore, secondly, while maintaining the amount of cellulosic particles such as wood flour at a predetermined amount so as not to impair the woody feel of the material, it is lightweight, and has both good bending workability and high screw pull-out strength, Furthermore, the present inventors have studied to obtain a woody resin structure that does not warp. As a result, the thickness of the layer containing the cellulose-based powder (A) is set to the above-mentioned relatively small value, the reinforcing layer is made to be a foamed layer (B) having a predetermined expansion ratio, and the layer (A) and the foamed layer are Surprisingly, it has been found that when the thickness of (B) is maintained in a predetermined relationship, a woody resin structure having all the above characteristics can be obtained. Such a woody resin structure can be preferably formed by co-extrusion of the layer (A) and the foamed layer (B), so that separate processing of the adhesive and the reinforcing material is unnecessary, and the cost is also reduced. Very good.
【0010】好ましい態様として、 (2)層(A)の厚みが、2〜10mmである上記
(1)記載の木質樹脂構造体、 (3)発泡層(B)の発泡倍率が、1.5〜4.0であ
る上記(1)又は(2)記載の木質樹脂構造体、 (4)発泡層(B)の厚みが、2〜50mmである上記
(1)〜(3)のいずれか一つに記載の木質樹脂構造
体、 (5)略円柱状の成形体であるところの上記(1)〜
(4)のいずれか一つに記載の木質樹脂構造体、 (6)偏肉部を有する成形体であるところの上記(1)
〜(5)のいずれか一つに記載の木質樹脂構造体、 (7)偏肉部を有する成形体が、層(A)及び発泡層
(B)を持つ略L字形の成形体であり、かつ各辺を形成
する層(A)及び/又は発泡層(B)の厚みが互いに異
なるものである上記(6)記載の木質樹脂構造体、 (8)共押出により成形された上記(1)〜(7)のい
ずれか一つに記載の木質樹脂構造体を挙げることができ
る。In a preferred embodiment, (2) the woody resin structure according to the above (1), wherein the thickness of the layer (A) is 2 to 10 mm, and (3) the expansion ratio of the foamed layer (B) is 1.5. (4) any one of the above (1) to (3), wherein the thickness of the foamed layer (B) is 2 to 50 mm; ( 5 ) The above-mentioned (1) to ( 5 ), which are substantially columnar molded bodies.
( 4 ) The woody resin structure according to any one of ( 4 ), ( 6 ) the above (1), which is a molded body having an uneven thickness portion.
The woody resin structure according to any one of ( 1 ) to ( 5 ), ( 7 ) the molded body having the uneven thickness portion is a substantially L-shaped molded body having a layer (A) and a foamed layer (B), The layer (A) and / or the foam layer (B) forming each side have different thicknesses from each other, and the woody resin structure according to the above ( 6 ), ( 8 ) the above (1) formed by coextrusion. To woody resin structures described in any one of ( 7 ) to ( 7 ).
【0011】[0011]
【発明の実施の形態】本発明の層(A)に使用する樹脂
組成物中のセルロース系粉粒体は、特に制限はなく、例
えばオガ粉、木屑、パルプ粉等を使用し得る。好ましく
は製材工程で発生する松、杉、ひのき、ツガ等のオガ粉
が用いられる。BEST MODE FOR CARRYING OUT THE INVENTION The cellulosic powder in the resin composition used in the layer (A) of the present invention is not particularly limited, and for example, sawdust, wood chips, pulp powder and the like can be used. Preferably, sawdust such as pine, cedar, cypress, hemlock and the like generated in the sawing process is used.
【0012】層(A)に使用する熱可塑性樹脂として
は、特に限定されるものではないが、好ましくは、ポリ
スチレン樹脂、ABS樹脂、AS樹脂、AES樹脂、変
性PPE樹脂、ポリカーボネート樹脂、ポリメチルメタ
クリレート樹脂、ポリアセタール樹脂、ポリエチレン樹
脂、ポリプロピレン樹脂、ポリアミド樹脂、ポリエステ
ル樹脂等が挙げられる。特に好ましくは、ABS樹脂、
ポリスチレン樹脂、AS樹脂、AES樹脂、変性PPE
樹脂、ポリプロピレン樹脂が使用される。これらの熱可
塑性樹脂は単独で用いてもよいし、あるいは二種以上を
併用することもできる。The thermoplastic resin used for the layer (A) is not particularly limited, but is preferably a polystyrene resin, an ABS resin, an AS resin, an AES resin, a modified PPE resin, a polycarbonate resin, a polymethyl methacrylate. Resins, polyacetal resins, polyethylene resins, polypropylene resins, polyamide resins, polyester resins, and the like. Particularly preferably, ABS resin,
Polystyrene resin, AS resin, AES resin, modified PPE
Resin and polypropylene resin are used. These thermoplastic resins may be used alone or in combination of two or more.
【0013】層(A)に使用する樹脂組成物中のセルロ
ース系粉粒体及び熱可塑性樹脂の配合量は、セルロース
系粉粒体20〜70重量部に対して熱可塑性樹脂80〜
30重量部、好ましくはセルロース系粉粒体30〜60
重量部に対して熱可塑性樹脂70〜40重量部、特に好
ましくはセルロース系粉粒体40〜55重量部に対して
熱可塑性樹脂60〜45重量部である。セルロース系粉
粒体が上記下限未満で熱可塑性樹脂が上記上限を超える
と成形品に木の触感が得られず、偏肉部を有する成形体
においては反りが生じる。セルロース系粉粒体が上記上
限を超え熱可塑性樹脂が上記下限未満では造粒等が困難
になり成形に支障を来たす。The blending amount of the cellulose-based particles and the thermoplastic resin in the resin composition used in the layer (A) is such that the amount of the thermoplastic resin is from 80 to 70 parts by weight of the cellulose-based particles.
30 parts by weight, preferably cellulosic powder 30-60
70 to 40 parts by weight of the thermoplastic resin with respect to parts by weight, particularly preferably 60 to 45 parts by weight of the thermoplastic resin with respect to 40 to 55 parts by weight of the cellulosic powder. If the cellulosic powder is less than the above lower limit and the thermoplastic resin is more than the above upper limit, the tactile sensation of wood is not obtained in the molded product, and the molded product having the uneven thickness portion is warped. If the amount of the cellulosic powder exceeds the above upper limit and the amount of the thermoplastic resin is below the above lower limit, granulation or the like becomes difficult, which hinders molding.
【0014】上記の樹脂組成物には、セルロース系粉粒
体と熱可塑性樹脂との相容性を高めるために、好ましく
は、ヒドロキシル基(例えば、2‐ヒドロキシエチルア
クリレート)、カルボキシル基(例えば、メタクリル
酸)、酸無水物基、エポキシ基(例えば、グリシジルメ
タクリレート)、オキサゾリル基、マレイミド基、エス
テル基、アミド基及びエーテル基等の官能基を有する化
合物を添加することができる。The above resin composition preferably contains a hydroxyl group (for example, 2-hydroxyethyl acrylate) or a carboxyl group (for example, 2-hydroxyethyl acrylate) in order to increase the compatibility between the cellulosic powder and the thermoplastic resin. A compound having a functional group such as methacrylic acid), an acid anhydride group, an epoxy group (for example, glycidyl methacrylate), an oxazolyl group, a maleimide group, an ester group, an amide group, and an ether group can be added.
【0015】これらの相容化剤の配合量は、セルロース
系粉粒体及び熱可塑性樹脂の合計100重量部に対し
て、下限が好ましくは1重量部、特に好ましくは3重量
部であり、上限が好ましくは20重量部、特に好ましく
は10重量部である。上記下限未満では、十分な相容性
が得られず強度低下を引起すことがあり、上記上限を超
えても、効果の増大はなくコスト高を招く。The amount of these compatibilizers is preferably 1 part by weight, particularly preferably 3 parts by weight, and more preferably 3 parts by weight, based on 100 parts by weight of the total of the cellulosic powder and the thermoplastic resin. Is preferably 20 parts by weight, particularly preferably 10 parts by weight. If the amount is less than the lower limit, sufficient compatibility may not be obtained and the strength may be reduced. If the amount exceeds the upper limit, the effect is not increased and the cost is increased.
【0016】また、本発明の層(A)に使用する樹脂組
成物には本発明の効果を損なわない範囲内で、上記の成
分以外に当業者に公知の各種の添加剤、例えば酸化防止
剤、光安定剤、帯電防止剤、滑剤、染料、顔料、可塑
剤、離形剤、ガラス繊維、金属繊維、金属フレーク、難
燃剤、紫外線吸収剤等の添加剤、充填材、補強材を添加
することができる。The resin composition used in the layer (A) of the present invention may contain various additives known to those skilled in the art, in addition to the above components, within a range not to impair the effects of the present invention. Add additives such as light stabilizers, antistatic agents, lubricants, dyes, pigments, plasticizers, mold release agents, glass fibers, metal fibers, metal flakes, flame retardants, ultraviolet absorbers, fillers, and reinforcing materials be able to.
【0017】本発明の発泡層(B)に使用する熱可塑性
樹脂としては、上記の層(A)に使用する熱可塑性樹脂
と同じ樹脂を使用することができる。好ましくは、樹脂
相互間の密着性を上げるために、発泡層(B)に使用す
る熱可塑性樹脂と層(A)に使用する熱可塑性樹脂とは
同系の樹脂が使用され得る。例えば、ポリスチレン、A
BS樹脂、AS樹脂、AES樹脂等のスチレン系樹脂に
対してはスチレン系樹脂、又はPPEとスチレン系樹脂
とのブレンド若しくはPPEにスチレン系化合物がグラ
フトした共重合体等の変性PPE樹脂を使用することが
好ましい。また、ポリエチレン樹脂、ポリプロピレン樹
脂等のオレフィン系樹脂に対してはオレフィン系樹脂を
使用することが好ましい。As the thermoplastic resin used for the foamed layer (B) of the present invention, the same resin as the thermoplastic resin used for the layer (A) can be used. Preferably, the thermoplastic resin used for the foamed layer (B) and the thermoplastic resin used for the layer (A) may be of the same type in order to increase the adhesion between the resins. For example, polystyrene, A
For styrene resins such as BS resin, AS resin and AES resin, use a styrene resin, or a modified PPE resin such as a blend of PPE and styrene resin or a copolymer of styrene compound grafted on PPE. Is preferred. Further, it is preferable to use an olefin resin for an olefin resin such as a polyethylene resin and a polypropylene resin.
【0018】発泡層(B)の発泡倍率は、上限が5.
0、好ましくは4.0、特に好ましくは3.0であり、
下限は1.2、好ましくは1.5、特に好ましくは1.
7である。発泡倍率が上記下限未満では、曲げ加工が困
難であり、また軽量化の効果も低い。上記上限を超えて
は、ネジの引き抜き強度が低下するため構造体として使
用した際に脱落等の問題が生じる。The upper limit of the expansion ratio of the foamed layer (B) is 5.
0, preferably 4.0, particularly preferably 3.0,
The lower limit is 1.2, preferably 1.5, particularly preferably 1.
7 When the expansion ratio is less than the above lower limit, bending is difficult, and the effect of weight reduction is low. If the upper limit is exceeded, the pull-out strength of the screw decreases, so that problems such as falling off when used as a structure occur.
【0019】該発泡層(B)を得るための発泡剤として
は、公知の物質を公知の量で使用することができる。例
えば、炭酸水素ナトリウム、炭酸アンモニウム、アゾジ
カルボンアミド、ベンゼンスルホニルヒドラジド等の固
体発泡剤を使用し得る。As the foaming agent for obtaining the foamed layer (B), known substances can be used in known amounts. For example, a solid blowing agent such as sodium bicarbonate, ammonium carbonate, azodicarbonamide, benzenesulfonyl hydrazide and the like can be used.
【0020】発泡層(B)に使用する熱可塑性樹脂に
は、発泡剤による発泡効果等を損なわない範囲で、上記
の各種の添加剤を添加することができる。また、上記の
セルロース系粉粒体を20重量部未満で含めることも可
能である。この際、上記と同様に相容化剤を適量配合す
ることも可能である。The above-mentioned various additives can be added to the thermoplastic resin used for the foamed layer (B) as long as the foaming effect of the foaming agent is not impaired. It is also possible to include the above-mentioned cellulosic powder in less than 20 parts by weight. At this time, it is also possible to mix an appropriate amount of a compatibilizer in the same manner as described above.
【0021】本発明の層(A)及び発泡層(B)を有す
る木質樹脂構造体は、セルロース系粉粒体及び熱可塑性
樹脂を含む層(A)を構成する樹脂組成物と、発泡剤及
び任意的に各種の添加剤等を含む発泡層(B)を構成す
る熱可塑性樹脂とを、好ましくは共押出成形することに
より製造することができる。共押出成形の方法として
は、公知の方法を使用することができ、押出成形中に発
泡剤が作用して発泡層(B)が形成される。The woody resin structure having the layer (A) and the foamed layer (B) of the present invention comprises a resin composition constituting the layer (A) containing a cellulosic powder and a thermoplastic resin, a foaming agent and It can be produced preferably by co-extrusion with a thermoplastic resin constituting the foamed layer (B) optionally containing various additives and the like. As a method of coextrusion, a known method can be used, and a foaming agent acts during extrusion molding to form a foamed layer (B).
【0022】このようにして製造される本発明の層
(A)及び発泡層(B)を有する木質樹脂構造体の形状
に特に制限はなく、所望により種々の形状のものを製造
することができる。好ましくは、芯部が発泡層(B)よ
り成り、かつ鞘部が層(A)から成る略円柱状の成形
体、層(A)と発泡層(B)が重ね合わされた四角柱状
の成形体、これらの各成形体を略L字状等に曲げた成形
体、又はこれらの各成形体であって偏肉部を有するも
の、例えば、層(A)及び発泡層(B)を持つ略L字形
の成形体であり、かつ各辺を形成する層(A)及び/又
は発泡層(B)の厚みが互いに異なる成形体等が挙げら
れる。The shape of the wooden resin structure having the layer (A) and the foamed layer (B) of the present invention thus produced is not particularly limited, and various shapes can be produced as desired. . Preferably, a substantially columnar shaped body in which the core portion is formed of the foamed layer (B) and the sheath portion is formed of the layer (A), and a square pillar-shaped formed body in which the layer (A) and the foamed layer (B) are superimposed. A molded body obtained by bending each of these molded bodies into a substantially L-shape or the like, or each of these molded bodies having an uneven thickness portion, for example, a substantially L-shaped body having a layer (A) and a foamed layer (B) Examples of the shaped body include a shaped body having a layer (A) forming each side and / or a foamed layer (B) having different thicknesses.
【0023】また、本発明の層(A)及び発泡層(B)
を有する木質樹脂構造体は、層(A)の厚みが10mm以
下、好ましくは2〜8mm、特に好ましくは4〜6mm
である。該厚みが上記上限を超えては、曲げ加工性が悪
くなると共に、曲げ加工時に成形品にしわが発生した
り、かつ軽量化を達成できない等の種々の問題を生ず
る。更に、層(A)の厚みは、発泡層(B)の厚み以下
であることが必要である。発泡層(B)の厚みを超えて
は、曲げ加工性が悪くなり、とりわけ、円柱状の成形品
にあってはより一層曲げ加工性が悪くなる。また、軽量
化を達成できない等の問題をも生ずる。発泡層(B)の
厚みは、層(A)の厚み以上であれば特に制限はない
が、通常2〜50mm程度である。ここで、略円柱状の
成形品における層(A)及び発泡層(B)の各厚みは、
成形品の断面の円の半径における層(A)及び発泡層
(B)の厚みを言う。The layer (A) of the present invention and the foamed layer (B)
The thickness of the layer (A) is 10 mm or less, preferably 2 to 8 mm, and particularly preferably 4 to 6 mm.
It is. When the thickness exceeds the above upper limit, bending workability is deteriorated, and various problems such as occurrence of wrinkles in a molded product at the time of bending and a reduction in weight cannot be achieved. Further, the thickness of the layer (A) needs to be equal to or less than the thickness of the foamed layer (B). When the thickness exceeds the thickness of the foamed layer (B), the bending workability deteriorates. In particular, in the case of a cylindrical molded product, the bending workability further deteriorates. In addition, there also arises a problem that weight reduction cannot be achieved. The thickness of the foamed layer (B) is not particularly limited as long as it is equal to or greater than the thickness of the layer (A), but is usually about 2 to 50 mm. Here, each thickness of the layer (A) and the foamed layer (B) in the substantially cylindrical molded product is as follows:
The thickness of the layer (A) and the foamed layer (B) at the radius of the circle of the cross section of the molded article.
【0024】このような本発明の層(A)及び発泡層
(B)を有する木質樹脂構造体において、上記本発明の
種々の効果を達成することができる。例えば、層(A)
のみの円柱状の中空成形体では、曲げ強度が低く、かつ
割れやすい。また、層(A)のみで中空部分を持たない
円柱状成形体では、強度は高いが、曲げ加工性が悪く、
かつ重く、更には釘や木ネジが打ち難いと言う欠点を有
している。In the woody resin structure having the layer (A) and the foamed layer (B) of the present invention, the various effects of the present invention can be achieved. For example, layer (A)
The columnar hollow molded body having only a low bending strength has low bending strength and is easily broken. Further, a columnar molded body having only the layer (A) and having no hollow portion has high strength, but has poor bending workability.
It is heavy and has the drawback that nails and wood screws are difficult to strike.
【0025】本発明の木質樹脂構造体において、層
(A)及び発泡層(B)は同じ色調で着色されているこ
とが好ましい。層(A)及び発泡層(B)が異なった色
調又は無着色の場合には、その断面を見たときに一体感
がなく、木のように見えないため好ましくない。In the woody resin structure of the present invention, the layer (A) and the foamed layer (B) are preferably colored in the same color. When the layer (A) and the foamed layer (B) are different in color tone or non-colored, it is not preferable because the cross section does not have a sense of unity and does not look like a tree.
【0026】本発明の木質樹脂構造体は、建材、自動車
部品、家電等の化粧材、構造部材等に好ましく使用され
る。The woody resin structure of the present invention is preferably used for building materials, automobile parts, decorative materials for home appliances, structural members and the like.
【0027】以下、実施例により本発明を更に詳しく説
明するが、本発明はこれらの実施例により限定されるも
のではない。Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.
【0028】[0028]
【0029】[0029]
【実施例1〜4及び比較例1〜5】成分 <層(A)> セルロース系粉粒体及び熱可塑性樹脂を含む樹脂組成
物: ・ABS樹脂 テクノ ABS400、商標、テクノポ
リマー株式会社製 ・セルロース系粉粒体 製材工程で発生したオガ粉 <発泡層(B)> 熱可塑性樹脂: ・ABS樹脂 クララスチック SXD220、商標、住
化エイビィーエスラテックス株式会社製 <着色剤> ・セツナンカラードペレット 7AD0045(商標、
セツナン化成株式会社)、層(A)に約5重量%添加 成形 <層(A)を構成する組成物の調製>ABS樹脂 テク
ノ ABS400とオガ粉を使用して、セルロース系粉
粒体及び熱可塑性樹脂を含む樹脂組成物中のセルロース
系粉粒体含有量が夫々所定量となるように配合した。ま
た、着色剤としてベンガラ0.2重量部とチタンイエロ
ー0.8重量部を添加した。次いで、株式会社カワタ製
スーパーミキサーZ−1SPを用いて各成分を混合した
後、東芝機械株式会社製二軸押出機TEM-SS48型
を使用して押出しペレットを得た。 <発泡層(B)を構成する組成物の調製>ABS樹脂
クララスチック SXD220に着色剤としてベンガラ
0.2重量部とチタンイエロー0.8重量部及び所定量
の発泡剤を添加した。次いで、上記と同様にしてペレッ
トを得た。 <円柱棒状の成形品の製造>上記のようにして製造し
た、層(A)を構成する組成物及び発泡層(B)を構成
する組成物を夫々別々の単軸押出機(FS50、商標、
池貝株式会社製、スクリュー径50mm)を使用して同
時に共押出して、図1の断面形状を持つ外形35mmφ
の二層構造を持った円柱棒状の成形品を製造した。押出
しの際、同時に着色剤としてのセツナンカラードペレッ
トをマスターバッチとして層(A)に添加して層(A)
の表面に木目模様を施した。Examples 1 to 4 and Comparative Examples 1 to 5 Components <Layer (A)> Resin composition containing cellulosic powder and thermoplastic resin: ABS resin Techno ABS400, trademark, manufactured by Techno Polymer Co., Ltd. Cellulose Saw powder generated in the lumbering process <Foam layer (B)> Thermoplastic resin: ABS resin CLALASTIC SXD220, trademark, manufactured by Sumika Avis Latex Co., Ltd. <Colorant>-Setsunan colored pellets 7AD0045 (trademark,
(Setsunan Chemical Co., Ltd.), about 5% by weight added to layer (A) Molding <Preparation of composition constituting layer (A)> Using ABS resin techno ABS400 and sawdust, cellulose-based powder and thermoplastic resin They were blended so that the content of the cellulosic powder in the resin composition containing the resin was a predetermined amount. 0.2 parts by weight of red iron oxide and 0.8 parts by weight of titanium yellow were added as coloring agents. Next, after mixing each component using a super mixer Z-1SP manufactured by Kawata Corporation, an extruded pellet was obtained using a twin screw extruder TEM-SS48 manufactured by Toshiba Machine Co., Ltd. <Preparation of composition constituting foam layer (B)> ABS resin
0.2 parts by weight of Bengala, 0.8 parts by weight of titanium yellow, and a predetermined amount of a foaming agent were added to the CLALASTIC SXD220 as colorants. Next, pellets were obtained in the same manner as described above. <Production of cylindrical rod-shaped molded article> The composition constituting the layer (A) and the composition constituting the foamed layer (B) produced as described above were separately supplied to separate single-screw extruders (FS50, trademark,
(Ikegai Co., Ltd., screw diameter 50 mm) and co-extruded simultaneously to obtain an outer diameter of 35 mmφ having the cross-sectional shape of FIG.
A cylindrical rod-shaped molded product having a two-layer structure was manufactured. At the time of extrusion, at the same time, setunan colored pellets as a coloring agent are added as a master batch to layer (A) to form layer (A).
A wood grain pattern was applied to the surface of.
【0030】試験 <曲げ加工性>円柱棒状の成形品を1.5mの長さに切
り出した。該成形品の両端を固定し、成形品の中央部に
110℃の熱風を10分間あてた後、熱風をあてながら
該加熱部分を徐々に曲げた。曲げ終了後、熱風を止め、
そのままの状態で10分間自然冷却した。次いで、曲げ
部分のしわ、割れを目視にて観察した。表1の各記号は
下記の内容を示す。Test <Bendability> A cylindrical rod-shaped molded product was cut into a length of 1.5 m. Both ends of the molded product were fixed, and hot air at 110 ° C. was blown to the center of the molded product for 10 minutes, and then the heated portion was gradually bent while blowing hot air. After bending, stop hot air,
The mixture was naturally cooled for 10 minutes as it was. Next, wrinkles and cracks in the bent portion were visually observed. Each symbol in Table 1 indicates the following.
【0031】 ○ しわ、割れなし × しわ、割れが著しい <ネジの引き抜き強度>円柱棒状の成形品に、ドリルで
3.45mmの穴をあけ、外形4mmの木ネジを締め込
んだ。該成形品を固定して、木ネジを引き抜き、引き抜
き強度を測定した。 <木目模様> 成形品表面の木目模様を目視で観察した。表1の各記号
は下記の内容を示す。 ○ 木のような木目が認められる × まったく木目が観察されない <木の触感>成形品表面を手で触れて、手触りにより評
価した。表1の各記号は下記の内容を示す。○ No wrinkles or cracks × Wrinkles or cracks were significant <Pull-out strength of screw> A 3.45 mm hole was drilled in a cylindrical rod-shaped molded product, and a wood screw having an outer diameter of 4 mm was tightened. After fixing the molded product, the wood screw was pulled out, and the pull-out strength was measured. <Grain pattern> The grain pattern of the surface of the molded article was visually observed. Each symbol in Table 1 indicates the following. ○ Wood-like grain is recognized. × No grain is observed. <Tactile feel of wood> The surface of the molded product was touched by hand and evaluated by touch. Each symbol in Table 1 indicates the following.
【0032】 ○ 木のような触感が認められる × プラスチックのような触感である 以上の結果を表1に示す。○ Tactile sensation like wood is recognized. × Tactile sensation like plastic. The above results are shown in Table 1.
【0033】[0033]
【表1】 実施例1〜3は、本発明の円柱棒状の木質樹脂構造体に
おいて、層(A)のセルロース系粉粒体含有量を本発明
の範囲内で変化させたものである。曲げ加工性、木目模
様及び木の感触はいずれも良好であった。ネジの引き抜
き強度も良好であり、かつ該強度はセルロース系粉粒体
の含有量を増加すると著しく上昇することが分かった。
実施例4は、実施例1において、その発泡倍率を本発明
の範囲内でより高くしたものである。ネジの引き抜き強
度が多少低かったが、本発明の効果を十分に達成し得る
ものであった。[Table 1] Examples 1 to 3 are examples in which the content of the cellulose-based particles in the layer (A) is changed within the range of the present invention in the cylindrical rod-shaped woody resin structure of the present invention. Bending workability, grain pattern and feel of wood were all good. The pull-out strength of the screw was also good, and it was found that the strength increased remarkably when the content of the cellulosic powder was increased.
Example 4 differs from Example 1 in that the expansion ratio was increased within the scope of the present invention. Although the pull-out strength of the screw was somewhat low, the effect of the present invention could be sufficiently achieved.
【0034】一方、比較例1は、層(A)のセルロース
系粉粒体含有量を本発明の範囲未満にしたものである。
木の感触は著しく悪化し、プラスチックのような触感で
あった。ネジの引き抜き強度も著しく低下した。比較例
2は、セルロース系粉粒体含有量が本発明の範囲を超え
たものである。ネジの引き抜き強度は増加するものの、
曲げ加工性及び木目模様は著しく悪化した。比較例3
は、実施例1において、層(A)の厚みを本発明の範囲
外にしたものである。ネジの引き抜き強度は増加するも
のの、曲げ加工性が著しく悪化した。比較例4は、実施
例1の層(B)を発泡層としなかったものである。ネジ
の引き抜き強度は高いものの、曲げ加工性が著しく悪く
なった。比較例5は、実施例1において、層(B)の発
泡倍率が本発明の範囲を超えたものである。ネジの引き
抜き強度が著しく低下した。On the other hand, in Comparative Example 1, the content of the cellulosic powder in the layer (A) was less than the range of the present invention.
The feel of the wood was noticeably worse and had a plastic feel. The pull-out strength of the screw was also significantly reduced. In Comparative Example 2, the content of the cellulosic powder was beyond the range of the present invention. Although the pull-out strength of the screw increases,
The bendability and grain pattern deteriorated markedly. Comparative Example 3
In Example 1, the thickness of the layer (A) was outside the range of the present invention. Although the pull-out strength of the screw increased, the bending workability deteriorated remarkably. In Comparative Example 4, the layer (B) of Example 1 was not used as a foam layer. Although the pull-out strength of the screw was high, the bending workability was remarkably deteriorated. Comparative Example 5 is different from Example 1 in that the expansion ratio of the layer (B) exceeded the range of the present invention. The pull-out strength of the screw was significantly reduced.
【0035】[0035]
【実施例5〜8及び比較例6〜9】<層(A)> セルロース系粉粒体及び熱可塑性樹脂を含む樹脂組成
物: ・ポリスチレン樹脂 デンカスチロール GP−1、商
標、電気化学工業株式会社製 ・官能基含有スチレン系樹脂 ダイラーク 232、商
標、ノバケミカル ジャパン リミテッド(マレイン酸変
性ポリスチレン) 5重量%添加 ・セルロース系粉粒体 製材工程で発生したオガ粉 <発泡層(B)> 熱可塑性樹脂: ・ポリスチレン樹脂 デンカスチロール QP−2、商
標、電気化学工業株式会社製 <着色剤> ・セツナンカラードペレット 7AD0045(商標、
セツナン化成株式会社)、層(A)に約5重量%添加 成形 上記の実施例と同様にして、図2に示したような断面形
状を有する偏肉部を持つL字型の異型押出成形品を製造
した。Examples 5 to 8 and Comparative Examples 6 to 9 <Layer (A)> Resin composition containing cellulosic powder and thermoplastic resin: Polystyrene resin Denkastyrol GP-1, trademark, Denki Kagaku Kogyo Co., Ltd.・ Functional group-containing styrene resin Dailark 232, trademark, Nova Chemical Japan Limited (maleic acid-modified polystyrene) 5% by weight ・ Cellulose powder Granular material generated in sawmilling process <Foam layer (B)> Thermoplastic resin : ・ Polystyrene resin Denkastyrol QP-2, trademark, manufactured by Denki Kagaku Kogyo Co., Ltd. <Colorant>-Setsunan colored pellets 7AD0045 (trademark,
(Setsunan Chemical Co., Ltd.), about 5% by weight added to layer (A) Molding In the same manner as in the above example, an L-shaped extruded product having an uneven thickness portion having a cross-sectional shape as shown in FIG. Was manufactured.
【0036】試験 <反り>上記の押出成形後のL字型成形品を約1m長に
切断し、次いで、室温で1時間放置した後、その反りを
目視により観察した。表2の各記号は下記の内容を示
す。Test <Warpage> The L-shaped molded product after the above extrusion molding was cut into a length of about 1 m, then left at room temperature for 1 hour, and the warpage was visually observed. Each symbol in Table 2 indicates the following.
【0037】 ○ 反りなし × 反り大 <ネジの引き抜き強度>L字型成形品に、ドリルで3.
45mmの穴をあけ、外形4mmの木ネジを締め込んだ
[発泡層(B)の厚みがZmmの部分に層(A)側から
締め込んだ]。該成形品を固定して、木ネジを引き抜
き、引き抜き強度を測定した。○ No warpage × Large warp <Pull-out strength of screw> L-shaped molded product was drilled with 3.
A 45 mm hole was drilled, and a wood screw with an outer diameter of 4 mm was tightened [the foam layer (B) was tightened from the layer (A) side to the Zmm thickness portion]. After fixing the molded product, the wood screw was pulled out, and the pull-out strength was measured.
【0038】以上の結果を表2に示す。Table 2 shows the above results.
【0039】[0039]
【表2】 実施例5〜7は、上記L字形の本発明の木質樹脂構造体
において、層(A)のセルロース系粉粒体含有量を本発
明の範囲内で変化させたものである。いずれの成形品も
反りは全く見られなかった。ネジの引き抜き強度も良好
であり、かつ該強度はセルロース系粉粒体の含有量を増
加すると著しく上昇することが分かった。実施例8は、
実施例5において、その発泡倍率を本発明の範囲内でよ
り高くしたものである。やはり成形品の反りは認められ
なかった。ネジの引き抜き強度は多少低かったが、本発
明の効果を十分に達成し得るものであった。[Table 2] In Examples 5 to 7, in the L-shaped woody resin structure of the present invention, the content of the cellulose powder in the layer (A) was changed within the range of the present invention. No warpage was observed in any of the molded products. The pull-out strength of the screw was also good, and it was found that the strength increased remarkably when the content of the cellulosic powder was increased. Example 8
In Example 5, the expansion ratio was increased within the scope of the present invention. Again, no warpage of the molded article was observed. Although the pull-out strength of the screw was somewhat low, the effect of the present invention could be sufficiently achieved.
【0040】一方、比較例6は、層(A)のセルロース
系粉粒体の含有量を本発明の範囲未満にしたものであ
る。成形品に大きな反りが認められた。比較例7は、実
施例5において、層(A)の厚みを本発明の範囲外にし
たものである。成形品に著しい反りが見られた。比較例
8は、実施例5の層(B)を発泡層としなかったもので
ある。やはり成形品に著しい反りが認められた。比較例
9は、実施例5において、層(B)の発泡倍率が本発明
の範囲を超えたものである。反りは認められなかった
が、ネジの引き抜き強度が著しく低かった。On the other hand, in Comparative Example 6, the content of the cellulose powder in the layer (A) was less than the range of the present invention. A large warpage was observed in the molded product. Comparative Example 7 is different from Example 5 in that the thickness of the layer (A) is out of the range of the present invention. The molded product was significantly warped. In Comparative Example 8, the layer (B) of Example 5 was not used as a foam layer. Again, significant warpage was observed in the molded article. Comparative Example 9 is different from Example 5 in that the expansion ratio of the layer (B) exceeded the range of the present invention. No warpage was observed, but the pull-out strength of the screw was extremely low.
【0041】[0041]
【発明の効果】本発明は、視覚的に木に類似した外観を
有するばかりではなく、軽量で木の触感を持ち、かつ良
好な曲げ加工性及び高いネジの引き抜き強度を兼ね備
え、更には、偏肉部を有しても反りを殆ど生じないとこ
ろの木質樹脂構造体を提供する。The present invention not only has an appearance similar to wood visually, but also has a light weight and a tactile feel of wood, and has both good bending workability and high screw pull-out strength. Provided is a woody resin structure in which a warp hardly occurs even if it has a meat portion.
【図1】二層構造を持った円柱棒状の形状を持つ本発明
の木質樹脂構造体の断面図である。FIG. 1 is a cross-sectional view of a wooden resin structure of the present invention having a cylindrical rod shape having a two-layer structure.
【図2】偏肉部を持つL字型の本発明の木質樹脂構造体
の断面図である。FIG. 2 is a sectional view of an L-shaped woody resin structure of the present invention having an uneven thickness portion.
A:セルロース系粉粒体及び熱可塑性樹脂を含む樹脂組
成物から成る層(A) B:発泡層(B) X:層(A)の厚み Y、Z:発泡層(B)の厚みA: Layer (A) composed of a resin composition containing a cellulose-based powder and a thermoplastic resin B: Foamed layer (B) X: Thickness of layer (A) Y, Z: Thickness of foamed layer (B)
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 FI B29K 105:04 B29L 9:00 (72)発明者 魚橋 広道 東京都中央区八丁堀3−4−10 エコポ リマー株式会社内 (72)発明者 千場 建一 静岡県御殿場市東田中335番地の1 (72)発明者 長田 貴彦 静岡県御殿場市東田中335番地の1 (56)参考文献 特開 平6−330558(JP,A) 特開 平9−11386(JP,A) 特開 平11−138703(JP,A) 特開 平11−34148(JP,A) 特開 平8−207111(JP,A) 実開 平6−75738(JP,U) (58)調査した分野(Int.Cl.7,DB名) B32B 1/00 - 35/00 B29C 47/00 - 47/96 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 Identification symbol FI B29K 105: 04 B29L 9:00 (72) Inventor Hiromichi Uohashi 3-4-10 Hatchobori, Chuo-ku, Tokyo Inside Ecopolmer Co., Ltd. (72 ) Inventor Kenichi Senba, 335-1 Higashi-Tanaka, Gotemba-shi, Shizuoka Prefecture (72) Inventor Takahiko Nagata 335-1, Higashi-Tanaka, Gotemba-shi, Shizuoka Prefecture (56) References JP-A-6-330558 (JP, A) JP-A-9-11386 (JP, A) JP-A-11-138703 (JP, A) JP-A-11-34148 (JP, A) JP-A 8-207111 (JP, A) JP-A-6-75738 (JP) , U) (58) Fields investigated (Int. Cl. 7 , DB name) B32B 1/00-35/00 B29C 47/00-47/96
Claims (4)
木質樹脂構造体であって、該鞘部がセルロース系粉粒体
30〜60重量部及び熱可塑性樹脂70〜40重量部を
含む樹脂組成物から成る層(A)であり、該芯部が熱可
塑性樹脂を含む発泡層(B)であり、層(A)の厚みが
10mm以下かつ発泡層(B)の厚み以下であり、更に、
発泡層(B)の発泡倍率が1.2〜5.0であるところ
の木質樹脂構造体。1. A wood resin structure comprising a core and a sheath surrounding the core, wherein the sheath is a cellulosic powder or granular material.
A layer (A) made of a resin composition containing 30 to 60 parts by weight and 70 to 40 parts by weight of a thermoplastic resin, wherein the core is a foamed layer (B) containing a thermoplastic resin; The thickness is not more than 10 mm and not more than the thickness of the foamed layer (B).
A woody resin structure in which the expansion ratio of the foamed layer (B) is 1.2 to 5.0.
1記載の木質樹脂構造体。2. The woody resin structure according to claim 1, which is a substantially columnar molded body.
求項1又は2記載の木質樹脂構造体。3. The woody resin structure according to claim 1, wherein the woody resin structure is a molded body having an uneven thickness portion.
いずれか一つに記載の木質樹脂構造体。4. The woody resin structure according to claim 1, which is formed by coextrusion.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10210296A JP3126951B2 (en) | 1998-07-10 | 1998-07-10 | Woody resin structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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JP10210296A JP3126951B2 (en) | 1998-07-10 | 1998-07-10 | Woody resin structure |
Publications (2)
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JP2000025141A JP2000025141A (en) | 2000-01-25 |
JP3126951B2 true JP3126951B2 (en) | 2001-01-22 |
Family
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JP10210296A Expired - Lifetime JP3126951B2 (en) | 1998-07-10 | 1998-07-10 | Woody resin structure |
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JP5143521B2 (en) * | 2007-10-10 | 2013-02-13 | 積水樹脂プラメタル株式会社 | Sign |
KR20120110634A (en) * | 2011-03-30 | 2012-10-10 | (주)엘지하우시스 | Synthetic wood having elastic layer |
FI20145775A (en) * | 2014-09-05 | 2016-03-06 | Upm Kymmene Corp | composite Material |
FI125896B (en) * | 2014-09-05 | 2016-03-31 | Upm Kymmene Corp | composite materials |
FI125895B (en) * | 2014-09-05 | 2016-03-31 | Upm Kymmene Corp | composite materials |
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1998
- 1998-07-10 JP JP10210296A patent/JP3126951B2/en not_active Expired - Lifetime
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