JPH08132513A - Biodegradable loose cushioning material, and method and die for manufacturing same - Google Patents
Biodegradable loose cushioning material, and method and die for manufacturing sameInfo
- Publication number
- JPH08132513A JPH08132513A JP27523194A JP27523194A JPH08132513A JP H08132513 A JPH08132513 A JP H08132513A JP 27523194 A JP27523194 A JP 27523194A JP 27523194 A JP27523194 A JP 27523194A JP H08132513 A JPH08132513 A JP H08132513A
- Authority
- JP
- Japan
- Prior art keywords
- die
- cushioning material
- water
- biodegradable
- extruded
- 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.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Landscapes
- Molding Of Porous Articles (AREA)
- Biological Depolymerization Polymers (AREA)
- Buffer Packaging (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、梱包等に用いられる生
分解性バラ状緩衝材とその製造方法および製造用ダイに
関し、特に緩衝材の形状に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a biodegradable loose cushioning material used for packaging and the like, a method for producing the same, and a die for production, and more particularly to the shape of the cushioning material.
【０００２】[0002]
【従来の技術】従来、梱包等に簡便に用いられてきた使
い捨てプラスチック成形物の緩衝材が、環境保護の関点
から徐々に生分解性あるいは再利用性のある成形物に置
きかえられつつある。また、生分解性バラ状緩衝材とし
ては、澱粉を主原料として直径１０〜２０mmの中空形状
に発泡押出成形され、長さ２０〜５０mmに切断されたも
のが主として使用されているが、この製造工程あるいは
輸送工程において、緩衝材に割れが発生するため、形状
が単純で割れ難い中実の棒状に発泡押出成形されたもの
が普及しつつある。2. Description of the Related Art Conventionally, a cushioning material for a disposable plastic molding, which has been conveniently used for packaging and the like, is gradually being replaced by a molding having biodegradability or reusability from the viewpoint of environmental protection. As the biodegradable rose-like cushioning material, a material mainly made of starch which is foamed and extruded into a hollow shape having a diameter of 10 to 20 mm and cut into a length of 20 to 50 mm is mainly used. In the process or the transportation process, cracks occur in the cushioning material, so that foam extrusion molding into a solid rod shape, which has a simple shape and is difficult to break, is becoming popular.
【０００３】[0003]
【発明が解決しようとする課題】緩衝材は、輸送あるい
は保管される物品の損傷を防止するために使用されるも
のであり、緩衝材自体の重量はできるだけ軽い、すなわ
ち、嵩密度が低い方が良い。しかしながら、中空形状と
棒状とでは明らかに棒状の方が嵩密度が高い。また、緩
衝材の価格は、通常その体積により決定されており、嵩
密度の高い、すなわち、材料をより多量に使用した緩衝
材の価格が逆に低くなっていた。The cushioning material is used to prevent damage to articles transported or stored, and the weight of the cushioning material itself is as light as possible, that is, the bulk density is low. good. However, between the hollow shape and the rod shape, the rod shape obviously has a higher bulk density. Further, the price of the cushioning material is usually determined by its volume, and the price of the cushioning material having a high bulk density, that is, using a large amount of the material, is conversely low.
【０００４】本発明は、以上のような課題を解決するた
めになされたものであり、嵩密度の低い生分解性バラ状
緩衝材とその製造方法および製造用ダイを提供すること
を目的とする。The present invention has been made to solve the above problems, and an object of the present invention is to provide a biodegradable loose cushioning material having a low bulk density, a manufacturing method thereof, and a manufacturing die. .
【０００５】[0005]
【課題を解決するための手段】本発明による生分解性バ
ラ状緩衝材は、澱粉または植物性蛋白を主成分とし、カ
ール状に腕曲した棒形状に発泡成形されている構成であ
る。The biodegradable rosette-shaped cushioning material according to the present invention comprises starch or vegetable protein as a main component and is foamed and molded into a curled arm-bent rod shape.
【０００６】本発明による生分解性バラ状緩衝材の製造
方法は、澱粉または植物性蛋白を主成分とする含水材料
が、スクリュ式押出機で加熱・混練され、前記押出機の
先端に連通して設けられたダイから棒状に発泡押出成形
され、所定の成形長に切断されるバラ状緩衝材の製造方
法において、前記含水材料が前記ダイから発泡押出成形
される際に、前記ダイの押出口の周方向において異なる
流動抵抗を受ける方法である。In the method for producing a biodegradable loose cushioning material according to the present invention, a water-containing material containing starch or vegetable protein as a main component is heated and kneaded by a screw type extruder and communicated with the tip of the extruder. In a method for producing a loose cushioning material, which is foamed and extruded into a rod shape from a die provided and cut into a predetermined molding length, when the water-containing material is foamed and extruded from the die, an extrusion port of the die This is a method of receiving different flow resistance in the circumferential direction of.
【０００７】本発明による生分解性バラ状緩衝材の製造
用ダイは、澱粉または植物性蛋白を主成分とする含水材
料を加熱・混練する温度調節可能な加熱装置を具備され
たスクリュ式押出機と、加熱・混練されて高温可塑化溶
融状態の前記含水材料を棒状に発泡押出成形可能に前記
押出機の先端に連通して設けられたダイと、棒状に発泡
押出成形された前記含水材料を所定長に切断する切断装
置と、で構成されるバラ状緩衝材の製造装置において、
前記ダイの押出口が周方向において異なる流動方向長を
形成されている構成である。A die for producing a biodegradable loose buffer material according to the present invention is a screw type extruder equipped with a heating device capable of heating and kneading a water-containing material whose main component is starch or vegetable protein. A die provided in communication with the tip of the extruder so that the water-containing material that is heated and kneaded and is in a high-temperature plasticized and molten state can be foam-extruded into a rod shape; and the water-containing material that is foam-extruded into a rod shape. A cutting device for cutting to a predetermined length, and a manufacturing device for a loose cushioning material composed of:
The extrusion port of the die is formed to have different flow direction lengths in the circumferential direction.
【０００８】[0008]
【作用】本発明による生分解性バラ状緩衝材は、カール
状に腕曲した形状に成形されていることにより、腕曲し
た内側に空間が形成されるとともに、腕曲した外側にお
いても隣接する緩衝材間に必ず空間が生じる。また、本
発明による生分解性バラ状緩衝材の製造方法において
は、スクリュ式押出機により澱粉または植物性蛋白を主
成分とする高温に可塑化溶融された含水原料がダイから
発泡押出成形される際に、ダイの押出口の周方向におい
て異なる流動抵抗を受けることにより周方向において押
出速度が変化する。すなわち、ダイの押出口より棒状に
発泡押出成形される含水材料は、流動抵抗の大きい側の
押出成形速度が小さく、流動抵抗の小さい側の押出成形
速度が大きくなる。従って、発泡押出成形された含水材
料は、押出成形速度の小さい側を内側として腕曲しなが
ら成形される。さらに、本発明による生分解性バラ状緩
衝材の製造用ダイにおいては、ダイの押出口が周方向に
おいて異なる流動方向長を形成されていることにより、
押出口を流動する高温可塑化溶融状態の含水材料に対
し、周方向において異なる流動抵抗を与える。すなわ
ち、流動方向長の長い側が流動抵抗が大きく、流動方向
長の短い側の流動抵抗が小さくなる。押出物がダイの押
出口を流動するときの圧力降下は次式で表される。The biodegradable loose cushioning material according to the present invention is formed into a curled arm-bent shape, so that a space is formed inside the arm-bent and it is adjacent even on the arm-bent outside. There is always space between the cushioning materials. Further, in the method for producing the biodegradable loose cushioning material according to the present invention, the water-containing raw material which is plasticized and melted at a high temperature and which contains starch or vegetable protein as a main component by the screw type extruder is foamed and extruded from the die. At this time, the extrusion speed changes in the circumferential direction by receiving different flow resistances in the circumferential direction of the extrusion port of the die. In other words, the water-containing material foamed and extruded into a rod shape from the extrusion port of the die has a low extrusion molding rate on the side having a large flow resistance and a large extrusion molding rate on the side having a small flow resistance. Therefore, the foamed extrusion-molded water-containing material is molded while bending the arm with the side having a smaller extrusion molding speed as the inner side. Furthermore, in the die for producing a biodegradable loose cushioning material according to the present invention, since the extrusion ports of the die are formed with different flow direction lengths in the circumferential direction,
It imparts different flow resistances in the circumferential direction to the water-containing material in a high temperature plasticized and molten state flowing through the extrusion port. That is, the flow resistance on the longer side in the flow direction is larger, and the flow resistance on the shorter side in the flow direction is smaller. The pressure drop when the extrudate flows through the extrusion port of the die is expressed by the following equation.
【０００９】[0009]
【数１】 ここで、Ｐは圧力降下、Ｌは押出口の流動方向長、Ｄは
押出口の直径、μは押出物の粘度、Ｑは押出量である。
この式で示されるように、押出量、押出口の直径および
押出物の粘度が一定であれば、圧力降下は押出口の流動
方向長に比例する。従って、流動方向長の長い方が圧力
降下が大きく、流動方向長の短い方が圧力降下が小さ
く、押出物は圧力降下が大きい程流動し難く、圧力降下
が小さい程流動し易い。[Equation 1] Here, P is the pressure drop, L is the flow direction length of the extrusion port, D is the diameter of the extrusion port, μ is the viscosity of the extrudate, and Q is the extrusion rate.
As shown by this equation, if the extrusion rate, the diameter of the extrusion port, and the viscosity of the extrudate are constant, the pressure drop is proportional to the length of the extrusion port in the flow direction. Therefore, the longer the flow direction length is, the larger the pressure drop is, and the shorter the flow direction length is, the smaller the pressure drop is. The larger the pressure drop is, the more difficult the extrudate is to flow, and the smaller the pressure drop is, the easier the flow is.
【００１０】[0010]
【実施例】以下、図面とともに本発明による生分解性バ
ラ状緩衝材とその製造方法および製造用ダイの好適な実
施例について詳細に説明する。図１は本発明による生分
解性バラ状緩衝材の製造用ダイを含む製造装置の部分断
面図であり、図２はダイの拡大部分断面図、図３は図２
の他の実施例、図４は緩衝材の斜視図である。図におい
て、符号１で示されるものはスクリュ式二軸押出機であ
り、該押出機１はバレル２と、相互に噛合した状態で駆
動手段（図示せず）により回転駆動可能に前記バレル２
の内孔２ａに挿入された一対のスクリュ３，３ａと、で
構成されている。前記バレル２の先端部の端面２ｂには
ダイ４が取付ボルト４ａにより接続されている。前記ダ
イ４には前記バレル２の内孔２ａに連通する押出孔４ｂ
と、前記押出孔４ｂの先端部から絞られて前記ダイ４を
貫通し押出面４ｄへ開口する小径の円形断面の押出口４
ｃと、が形成されている。The preferred embodiments of the biodegradable loose cushioning material, the method for producing the same, and the production die according to the present invention will be described in detail below with reference to the drawings. 1 is a partial sectional view of a manufacturing apparatus including a die for manufacturing a biodegradable loose cushioning material according to the present invention, FIG. 2 is an enlarged partial sectional view of the die, and FIG. 3 is FIG.
Another embodiment, FIG. 4 is a perspective view of a cushioning material. In the figure, reference numeral 1 is a screw type twin-screw extruder, and the extruder 1 and the barrel 2 are rotatably driven by driving means (not shown) in a state of being meshed with each other.
And a pair of screws 3 and 3a inserted into the inner hole 2a. A die 4 is connected to an end surface 2b at the tip of the barrel 2 by a mounting bolt 4a. The die 4 has an extrusion hole 4b communicating with the inner hole 2a of the barrel 2.
And a small-diameter circular cross-section extrusion port 4 that is squeezed from the tip of the extrusion hole 4b and penetrates the die 4 to open to the extrusion surface 4d.
c and are formed.
【００１１】該押出口４ｃは、図２に拡大して示される
ように、その周方向において流動方向の長さが異なるよ
うに形成されている。すなわち、図１，２においては、
前記押出口４ｃは、内側の長さＡが対面する外側の長さ
Ｂより短かく、かつ、その間を滑らかに変化させて形成
されている。As shown in the enlarged view of FIG. 2, the extrusion port 4c is formed so that the length in the flow direction is different in the circumferential direction. That is, in FIGS.
The extrusion port 4c is formed such that the length A on the inner side is shorter than the length B on the outer side facing each other and the interval therebetween is smoothly changed.
【００１２】次に、ダイ４が以上のように構成された生
分解性バラ状緩衝材の製造装置において、緩衝材を製造
する場合について説明する。まず、バレル２が加熱装置
により所定の温度に加熱され、スクリュ３，３ａが所定
の回転数で回転駆動された押出機１において、押出機１
の後端部に設けられた材料供給口（図示せず）から澱粉
または植物性蛋白を主成分とする含水材料がバレル２の
内孔２ａへ所定供給割合で連続的に供給されると、含水
材料はスクリュ３，３ａにより内孔２ａ内を後端部から
先端部へ輸送されながら、バレル２により加熱されると
ともにスクリュ３，３ａにより混練され、高温可塑化溶
融状態となってバレル２の先端部に到る。高温の可塑化
溶融状態にある含水材料は、ダイ４の押出孔４ｂ、押出
口４ｃを経て押出面４ｄから棒状の発泡成形物として連
続的に発泡押出成形される。含水材料が押出口４ｃを通
過する際、押出孔４ｂから押出口４ｃの軸方向Ｃに流入
した含水材料は、押出口４ｃの内側では流動方向長が短
かいので流動抵抗が小さく従って流速が大きくなり、押
出口４ｃの外側では流動方向長が長いので流動抵抗が大
きく従って流速が小さくなる。その結果、押出口４ｃの
先端すなわち押出面４ｄから大気中へ押出された含水材
料は、内外側の流速の差によりＤ方向すなわち押出面の
外側方向に腕曲する。Next, a description will be given of the case where the cushioning material is manufactured in the biodegradable loose cushioning material manufacturing apparatus having the die 4 configured as described above. First, in the extruder 1 in which the barrel 2 is heated to a predetermined temperature by a heating device and the screws 3 and 3a are rotationally driven at a predetermined rotation speed, the extruder 1
When a water-containing material containing starch or vegetable protein as a main component is continuously supplied to the inner hole 2a of the barrel 2 at a predetermined supply rate from a material supply port (not shown) provided at the rear end of the water-containing material, The material is heated in the barrel 2 and kneaded by the screws 3 and 3a while being transported from the rear end portion to the tip portion in the inner hole 2a by the screws 3 and 3a, and is brought into a high temperature plasticized and melted state to be the tip of the barrel 2. Reach the department. The water-containing material in a high-temperature plasticized and melted state is continuously foamed and extruded from the extruded surface 4d through the extruded hole 4b and the extruded port 4c of the die 4 as a rod-shaped foamed molded product. When the water-containing material passes through the extrusion port 4c, the water-containing material that has flowed in from the extrusion hole 4b in the axial direction C of the extrusion port 4c has a short flow direction length inside the extrusion port 4c, so that the flow resistance is small and therefore the flow velocity is large. Since the length in the flow direction is long outside the extrusion port 4c, the flow resistance is large and therefore the flow velocity is small. As a result, the water-containing material extruded into the atmosphere from the tip of the extrusion port 4c, that is, the extruding surface 4d, bends in the D direction, that is, the outward direction of the extruding surface due to the difference in the inner and outer flow velocities.
【００１３】前記押出面４ｄから押出された含水材料は
直ちに発泡成形物となり、カール状に腕曲した棒形状に
冷却固化される。押出面４ｄ近くに配置された切断装置
（図示せず）、例えば、押出面４ｄに沿って所定周期で
回転するカッタ刃により発泡成形物は所定長に切断さ
れ、図４に示されるようなバラ状緩衝材５０が得られ
る。The water-containing material extruded from the extruding surface 4d immediately becomes a foamed molded product, and is cooled and solidified into a rod shape bent into a curled arm. The foamed molded product is cut into a predetermined length by a cutting device (not shown) arranged near the extrusion surface 4d, for example, a cutter blade which rotates at a predetermined cycle along the extrusion surface 4d, and is cut into pieces as shown in FIG. The cushioning material 50 is obtained.
【００１４】図１に示されるダイ４は押出口４ｃを複数
箇設けられているが１箇でも良い。また、図２に示され
る押出口４ｃの形状において、押出口４ｃ内面の対面す
る流動方向長の最長部と最短部とを滑かに変化させて接
続する２つの半円の内周方向における変化状態を違える
ことにより、横方向すなわち図１，２の紙面に垂直な方
向の内周対面においても流動抵抗に差を設けることが可
能である。このように流動方向長の最長部と最短部とを
接続する両側の内周部においても流動抵抗に差を設ける
ことにより、本来のカール状の腕曲に加えてその直角方
向への腕曲も加わる。その結果、押出面４ｄから押出さ
れた成形物はコイルばね形状に押出成形される。また、
押出口４ｃの流動方向長の最長部および最短部の内周上
の位置を１８０度の真正面の対面位置からずらすことに
よっても同様の結果が得られる。The die 4 shown in FIG. 1 is provided with a plurality of extrusion ports 4c, but the number of extrusion ports 4c may be one. Further, in the shape of the extrusion port 4c shown in FIG. 2, changes in the inner circumferential direction of two semicircles that are connected by smoothly changing the longest part and the shortest part of the flow direction length facing the inner surface of the extrusion port 4c. By making the states different, it is possible to provide a difference in the flow resistance even in the lateral direction, that is, in the inner peripheral facing surface in the direction perpendicular to the paper surface of FIGS. In this way, by providing a difference in the flow resistance even on the inner peripheral portions on both sides that connect the longest part and the shortest part of the flow direction length, in addition to the original curled arm curve, the arm curve in the right angle direction Join. As a result, the molded product extruded from the extruding surface 4d is extruded into a coil spring shape. Also,
Similar results can be obtained by displacing the positions on the inner circumference of the longest part and the shortest part of the length of the extrusion port 4c in the flow direction from the facing position of 180 degrees in front.
【００１５】図１，２においては、押出口４ｃの周方向
における流動方向長の差がダイ４の内部すなわち押出孔
４ｂと押出口４ｃとの連通部で形成されているが、図３
に示されるように、押出口４ｃの押出面４ｄ側で形成さ
れても良い。このようにして形成される押出口４ｃの流
動方向長の最短部と最長部との比は１対１．５から１対
５までの範囲、好ましくは、１対２から１対３までの範
囲を採用する。１対１．５以下になると腕曲が小さく、
１対５以上になると腕曲し過ぎて内側にできる空間が小
さくなるとともに、押出物の表面が滑らかでなくなる。
本発明に使用されるスクリュ式押出機１は、単軸または
二軸、二軸の場合には同方向回転または異方向回転、噛
み合または非噛み合のいずれの形式でも良いが二軸噛み
合同方向回転押出機が好ましい。押出機１は、加熱装置
によりバレル２が、材料供給口を常温とし先端部を１８
０〜２００℃とするように後端部から先端部へ徐々に温
度が高くなるように加熱される。スクリュ３，３ａの回
転数は１５０〜４５０ｒｐｍの範囲、好ましくは２５０
〜３５０ｒｐｍの範囲を採用する。回転数が１５０ｒｐ
ｍ以下では剪断作用による含水材料の発熱が小さくて昇
温し難く、押出物が充分に膨化（発泡）しない。回転数
が４５０ｒｐｍ以上では含水材料の発熱が大き過ぎてコ
ゲが発生する。In FIGS. 1 and 2, the difference in the flow direction length in the circumferential direction of the extrusion port 4c is formed inside the die 4, that is, at the communicating portion between the extrusion hole 4b and the extrusion port 4c.
As shown in FIG. 5, it may be formed on the extrusion surface 4d side of the extrusion port 4c. The ratio of the shortest part to the longest part of the flow direction length of the extrusion port 4c thus formed is in the range of 1: 1.5 to 1: 5, preferably 1: 2 to 1: 3. To adopt. When the ratio is 1 to 1.5 or less, arm bending is small,
If the ratio is 1: 5 or more, the arms are bent too much and the space formed inside becomes small, and the surface of the extrudate becomes unsmooth.
The screw type extruder 1 used in the present invention may be a single-screw or twin-screw, and in the case of a twin-screw, it may be of the same rotation or different rotation, meshed or non-meshed, but twin-screw meshed. Directionally rotating extruders are preferred. In the extruder 1, the barrel 2 is heated by a heating device so that the material supply port is kept at room temperature
The temperature is gradually increased from the rear end portion to the front end portion so as to be 0 to 200 ° C. The number of revolutions of the screws 3 and 3a is in the range of 150 to 450 rpm, preferably 250.
Adopt a range of ~ 350 rpm. Rotation speed is 150 rp
When it is m or less, the heat generated by the hydrous material due to the shearing action is small and it is difficult to raise the temperature, and the extrudate does not sufficiently expand (foam). When the number of rotations is 450 rpm or more, heat generation of the water-containing material is too large and kogation occurs.
【００１６】澱粉を主成分とする含水材料は、澱粉原料
（水分が１０〜１２重量％含まれている）１００kgに対
し水を５〜１０kgの割合で添加し、水分率１５〜２０重
量％とする。水分率が１５重量％よりも低いと押出物が
硬すぎたり、バレル２内で焦げついたりする。水分率が
２０重量％よりも高いと水分の蒸発が不充分になり、膨
化率（発泡率）が低く、嵩密度が高くなる。澱粉として
は、ハイアミロース澱粉、化工澱粉（エーテル澱粉）、
馬鈴薯澱粉、トウモロコシ澱粉、タピオカ澱粉等があ
り、これ等の中の１種類あるいは２種類以上を適宜混合
して澱粉原料とされる。植物性蛋白を主成分とする含水
材料は、植物性蛋白原料（水分が１０〜１２重量％含ま
れている）１００kgに対し水を５〜１０Kgの割合で添加
し、水分率１５〜２０重量％とする。水分率が１５重量
％よりも低いと押出物が硬すぎたり、バレル２内で焦げ
ついたりする。水分率が２０重量％よりも高いと膨化率
（発泡率）が低く、嵩密度が高くなる。植物性蛋白とし
ては、大豆蛋白、小麦蛋白、トウモロコシ蛋白等があ
り、これ等の中の１種類あるいは２種類以上を適宜混合
して植物性蛋白原料とされる。なお、植物性蛋白は固形
物に対する粗蛋白質含量４０重量％以上が望ましい。The water-containing material containing starch as the main component is such that water is added at a ratio of 5 to 10 kg to 100 kg of starch raw material (containing 10 to 12% by weight of water) to obtain a water content of 15 to 20% by weight. To do. If the water content is lower than 15% by weight, the extrudate may be too hard or may burn in the barrel 2. When the water content is higher than 20% by weight, evaporation of water is insufficient, the expansion rate (foaming rate) is low, and the bulk density is high. As starch, high-amylose starch, modified starch (ether starch),
There are potato starch, corn starch, tapioca starch, and the like, and one or two or more of them are appropriately mixed and used as a starch raw material. A water-containing material containing vegetable protein as a main component is added with water at a rate of 5 to 10 kg to 100 kg of a vegetable protein raw material (containing 10 to 12% by weight of water), and a water content of 15 to 20% by weight. And If the water content is lower than 15% by weight, the extrudate may be too hard or may burn in the barrel 2. When the water content is higher than 20% by weight, the expansion rate (foaming rate) is low and the bulk density is high. Examples of the vegetable protein include soybean protein, wheat protein, corn protein and the like, and one kind or a mixture of two or more kinds of these is used as a vegetable protein raw material. The vegetable protein preferably has a crude protein content of 40% by weight or more based on the solid matter.
【００１７】実施例１．二軸スクリュ式押出機（日本製
鋼所製：ＴＥＸ５２Ｆ）１に２個の押出口４ｃを形成さ
れた下記２種類のダイ４を接続し、コーンスターチ（ト
ウモロコシ澱粉）を主成分とする含水材料により緩衝材
を製造した。 ダイＩ：押出口直径２．５mm、流動方向長３mm（短）／
６mm（長）、 ダイII：押出口直径２．５mm、流動方向長１．５mm／
４．５mm。 コーンスターチ７０kg／ｈおよび水５kg／ｈの供給割分
の含水材料を押出機１へ供給した。押出機１は、バレル
２を８０〜１８０℃に温度調節し、スクリュ３，３ａを
３００ｒｐｍで回転させた。押出物をダイ４の押出面４
ｄでカッタ装置により長さ４０〜５０mmに切断した。Embodiment 1. A twin-screw extruder (TEX52F manufactured by Japan Steel Works) 1 is connected to the following two types of dies 4 having two extrusion ports 4c, and buffered by a water-containing material containing corn starch (corn starch) as a main component. The wood was manufactured. Die I: Extrusion port diameter 2.5 mm, flow direction length 3 mm (short) /
6 mm (Long), Die II: Extrusion port diameter 2.5 mm, Flow direction length 1.5 mm /
4.5 mm. A water-containing material of a feed rate of 70 kg / h of corn starch and 5 kg / h of water was fed to the extruder 1. In the extruder 1, the temperature of the barrel 2 was adjusted to 80 to 180 ° C., and the screws 3 and 3a were rotated at 300 rpm. The extrudate is the extruded surface 4 of the die 4.
In d, it was cut into a length of 40 to 50 mm by a cutter device.
【００１８】前記押出物は、前記ダイＩでは太さ１３m
m、中心の曲率半径９０mmとなり、ダイIIでは太さ１２m
m、中心の曲率半径６０mmとなり、前記ダイIIの方が良
く腕曲した。 実施例２．実施例１と同一装置を使用し、小麦粉（小麦
澱粉）を主成分とする含水材料により緩衝材を製造し
た。小麦粉５０kg／ｈおよび水５kg／ｈの供給割分の含
水材料を押出機１へ供給した。押出機１は、バレル２を
８０〜１８０℃に温度調節し、スクリュ３，３ａを２８
０ｒｐｍで回転させた。押出物をダイ４の押出面４ｄで
カッタ装置により長さ４０〜５０mmに切断した。押出物
は、ダイＩでは太さ１０mm、中心の曲率半径７０mmとな
り、ダイIIでは太さ９mm、中心の曲率半径４５mmとな
り、実施例１と同様ダイIIの方が良く腕曲した。 実施例３．実施例１と同一装置を使用し、脱脂大豆（大
豆蛋白）を主成分とする含水材料により緩衝材を製造し
た。脱脂大豆６０kg／ｈおよび水４kg／ｈの供給割分の
含水材料を押出機１へ供給した。押出機１は、バレル２
を８０〜１８０℃に温度調節し、スクリュ３，３ａを３
００ｒｐｍで回転させた。押出物をダイ４の押出面４ｄ
でカッタ装置により長さ４０〜５０mmに切断した。押出
物は、ダイＩでは太さ８mm、中心の曲率半径５６mmとな
り、ダイIIでは太さ８mm、中心の曲率半径４０mmとな
り、実施例１および２と同様ダイIIの方が良く腕曲し
た。以上の実施例における緩衝材および従来のコーンス
ターチ、小麦粉および脱脂大豆を主成分とする棒状の緩
衝材の嵩密度を表１の第１表に示す。In the die I, the extrudate has a thickness of 13 m.
m, the radius of curvature of the center is 90 mm, and the thickness of Die II is 12 m
The radius of curvature of the center was 60 mm, and the die II was bent better. Embodiment 2. FIG. Using the same apparatus as in Example 1, a buffer material was manufactured from a water-containing material containing wheat flour (wheat starch) as a main component. A water-containing material of 50 kg / h of flour and 5 kg / h of water was supplied to the extruder 1. The extruder 1 controls the temperature of the barrel 2 to 80 to 180 ° C. and adjusts the temperature of the screws 3 and 3 a to 28 ° C.
It was rotated at 0 rpm. The extrudate was cut at a pushing surface 4d of the die 4 into a length of 40 to 50 mm by a cutter device. The extrudate had a thickness of 10 mm and a center radius of curvature of 70 mm in the die I, and a thickness of 9 mm and a center radius of curvature of 45 mm in the die II, and the die II was better bent as in Example 1. Example 3. Using the same apparatus as in Example 1, a buffer material was produced from a water-containing material containing defatted soybean (soy protein) as a main component. A hydrated material of 60 kg / h of defatted soybean and 4 kg / h of water was supplied to the extruder 1. Extruder 1 is barrel 2
The temperature to 80-180 ° C and screw 3 and 3a to 3
It was rotated at 00 rpm. The extrudate is placed on the extrusion surface 4d of the die 4.
It was cut into a length of 40 to 50 mm with a cutter device. The extrudate had a thickness of 8 mm and a radius of curvature of 56 mm at the center in the die I, and a thickness of 8 mm and a radius of curvature of 40 mm at the center in the die II. As in Examples 1 and 2, the die II was better bent. Table 1 of Table 1 shows the bulk densities of the buffer material and the conventional bar-shaped buffer material containing corn starch, flour and defatted soybean as the main components in the above examples.
【００１９】[0019]
【表１】 [Table 1]
【００２０】[0020]
【発明の効果】本発明による生分解性バラ状緩衝材とそ
の製造方法および製造用ダイは以上のように構成されて
いるため、次のような効果を得ることができる。 (１)バラ状緩衝材がカール状に腕曲された形状をしてい
るため、その内部の空間および外部の隣接する緩衝材と
の間に形成される空間により嵩密度が大きく低下した。 (２)ダイスの押出口の周方向において流動方向長に差を
設けて流動抵抗を変化させ、含水材料の押出し速度を周
方向に変化させるという単純な方法および装置により、
容易かつ連続的に嵩密度の低いバラ状緩衝材が製造可能
になった。The biodegradable loose cushioning material, the method for producing the same, and the production die according to the present invention are configured as described above, so that the following effects can be obtained. (1) Since the loose cushioning material has a curled arm shape, the bulk density is significantly reduced by the space formed between the interior cushioning material and the external cushioning material. (2) By a simple method and device in which the flow resistance is changed by providing a difference in the flow direction length in the circumferential direction of the extrusion port of the die and the extrusion speed of the water-containing material is changed in the circumferential direction,
It has become possible to easily and continuously manufacture a loose cushioning material having a low bulk density.
【図１】本発明による生分解性バラ状緩衝材の製造用ダ
イを含む製造装置の部分断面図である。FIG. 1 is a partial cross-sectional view of a manufacturing apparatus including a die for manufacturing a biodegradable loose cushioning material according to the present invention.
【図２】図１のダイの拡大部分断面図である。FIG. 2 is an enlarged partial sectional view of the die of FIG.
【図３】図２の他の実施例である。FIG. 3 is another embodiment of FIG.
【図４】本発明による生分解性バラ状緩衝材の斜視図で
ある。FIG. 4 is a perspective view of a biodegradable loose cushioning material according to the present invention.
１ 押出機 ２ バレル ３，３ａ スクリュ ４ ダイ ４ｃ 押出口 1 Extruder 2 Barrel 3,3a Screw 4 Die 4c Extrusion port
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ２９Ｌ 31:00 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 6 Identification code Office reference number FI technical display location B29L 31:00
Claims (3)
ール状に腕曲した棒形状に発泡成形されていることを特
徴とする生分解性バラ状緩衝材。1. A biodegradable rose-shaped cushioning material, which comprises starch or vegetable protein as a main component and is foam-molded into a curled arm-bent rod shape.
水材料が、スクリュ式押出機で加熱・混練され、前記押
出機の先端に連通して設けられたダイから棒状に発泡押
出成形され、所定の成形長に切断される生分解性バラ状
緩衝材の製造方法において、前記含水原料が前記ダイか
ら発泡押出成形される際に、前記ダイの押出口の周方向
において異なる流動抵抗を受けることを特徴とする生分
解性バラ状緩衝材の製造方法。2. A water-containing material containing starch or vegetable protein as a main component is heated and kneaded by a screw type extruder, and foamed and extruded into a rod shape from a die provided in communication with the tip of the extruder, In the method for producing a biodegradable loose cushioning material that is cut into a predetermined molding length, when the water-containing raw material is foamed and extruded from the die, it receives different flow resistance in the circumferential direction of the extrusion port of the die. And a method for producing a biodegradable loose cushioning material.
水材料を加熱・混練する温度調節可能な加熱装置を具備
されたスクリュ式押出機(1)と、加熱・混練されて高温
可塑化溶融状態の前記含水材料を棒状に発泡押出成形可
能に前記押出機(1)の先端に連通して設けられたダイ(4)
と、棒状に発泡押出成形された前記含水材料を所定長に
切断する切断装置と、で構成されるバラ状緩衝材の製造
装置において、前記ダイ(4)の押出口(4c)が周方向にお
いて異なる流動方向長を形成されていることを特徴とす
る生分解性バラ状緩衝材の製造用ダイ。3. A screw type extruder (1) equipped with a heating device capable of heating and kneading a water-containing material containing starch or vegetable protein as a main component, and a high-temperature plasticizing melt by heating and kneading. A die (4) provided in communication with the tip of the extruder (1) so that the water-containing material in the state can be foamed and extruded into a rod shape.
And a cutting device for cutting the water-containing material foam-extruded into a rod shape to a predetermined length, and in a manufacturing device for the loose cushioning material, the extrusion port (4c) of the die (4) in the circumferential direction. A die for manufacturing a biodegradable loose cushioning material, characterized in that it has different lengths in the flow direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27523194A JPH08132513A (en) | 1994-11-09 | 1994-11-09 | Biodegradable loose cushioning material, and method and die for manufacturing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27523194A JPH08132513A (en) | 1994-11-09 | 1994-11-09 | Biodegradable loose cushioning material, and method and die for manufacturing same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08132513A true JPH08132513A (en) | 1996-05-28 |
Family
ID=17552536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27523194A Pending JPH08132513A (en) | 1994-11-09 | 1994-11-09 | Biodegradable loose cushioning material, and method and die for manufacturing same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08132513A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998051467A1 (en) * | 1997-05-09 | 1998-11-19 | B.C. Foam S.R.L. | A process for the production of expanded polyester, in particular pet |
| KR100349795B1 (en) * | 1999-10-14 | 2002-08-22 | 상산소재 주식회사 | Method for manufacturing lamina and laminate made from starch and shaped article manufactured by using them |
-
1994
- 1994-11-09 JP JP27523194A patent/JPH08132513A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998051467A1 (en) * | 1997-05-09 | 1998-11-19 | B.C. Foam S.R.L. | A process for the production of expanded polyester, in particular pet |
| US6409948B1 (en) | 1997-05-09 | 2002-06-25 | B.C. Foam S.R.L. | Process and apparatus for the production of expanded polyester, in particular pet |
| KR100349795B1 (en) * | 1999-10-14 | 2002-08-22 | 상산소재 주식회사 | Method for manufacturing lamina and laminate made from starch and shaped article manufactured by using them |
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