JP2001254060A - Thermosensible adhesive paper three-dimensional shaping machine and three dimensional shaped item - Google Patents
Thermosensible adhesive paper three-dimensional shaping machine and three dimensional shaped itemInfo
- Publication number
- JP2001254060A JP2001254060A JP2000064639A JP2000064639A JP2001254060A JP 2001254060 A JP2001254060 A JP 2001254060A JP 2000064639 A JP2000064639 A JP 2000064639A JP 2000064639 A JP2000064639 A JP 2000064639A JP 2001254060 A JP2001254060 A JP 2001254060A
- Authority
- JP
- Japan
- Prior art keywords
- heat
- sensitive adhesive
- paper
- adhesive paper
- dimensional
- 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
Landscapes
- Adhesive Tapes (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Paper (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、熱接着方式の三次
元造形機に使用する感熱接着紙、及びこれを使用して得
られる三次元造形物に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-sensitive adhesive paper used for a heat bonding type three-dimensional printing machine, and a three-dimensional printed article obtained by using the same.
【0002】[0002]
【従来の技術】従来、自動車用各種部品、家電製品の部
品、各種玩具などを設計する場合に、粘土、木材、金属
などを使用して三次元形状のモデル(三次元造形物)を
作製することが行われていた。また、木材等を使用して
三次元造形物を作製し、これをもとにして砂等で鋳型を
製造し、これに溶融した金属を流し込んでから冷却固化
する方法で鋳物を製造していた。2. Description of the Related Art Conventionally, when designing various parts for automobiles, parts for home electric appliances, various toys, etc., a three-dimensional model (three-dimensional molded article) is manufactured using clay, wood, metal, or the like. That was being done. In addition, a three-dimensional molded article was manufactured using wood or the like, and a casting was manufactured by a method in which a mold was manufactured using sand or the like based on the three-dimensional molded article, and a molten metal was poured into the mold and cooled and solidified. .
【0003】最近では、コンピュータ技術の発展に伴
い、これらの三次元造形物を自動的に作製する方法が種
々提案されている。例えば、紫外線硬化樹脂を使用して
三次元造形物を作製する方法が提案されている。この方
法は、液状の紫外線硬化樹脂をバットに満たし、底部に
設置したステージを上昇させてステージの上の樹脂に紫
外線を照射して樹脂を硬化させてからステージを降ろ
し、再び上昇させて紫外線を照射することを繰り返すこ
とで三次元造形物を得る方法である。また樹脂を溶融さ
せながら積層して三次元造形物を得る方法も提案されて
いる。Recently, with the development of computer technology, various methods for automatically producing these three-dimensional objects have been proposed. For example, a method of producing a three-dimensional structure using an ultraviolet curable resin has been proposed. In this method, the bat is filled with a liquid ultraviolet-curing resin, the stage placed at the bottom is raised, the resin on the stage is irradiated with ultraviolet rays to cure the resin, the stage is lowered, and then raised again to emit the ultraviolet rays. This is a method of obtaining a three-dimensional structure by repeating irradiation. A method of obtaining a three-dimensional structure by laminating the resin while melting the resin has also been proposed.
【0004】特開平9−66565号には、後に詳しく
述べるように、裏面に感熱接着剤層を設けた感熱接着シ
ートを、上下動可能な台の上面に順次供給し、この供給
された感熱接着紙の表面を押圧しながら加熱して上記台
または既に供給された感熱接着シートの表面に接着する
とともに、これらの感熱接着シートに所定形状の切断線
を設けて複数の層から成る積層体を形成し、この積層体
から不要部分を除去することで三次元造形物を作製する
方法が提案されている。Japanese Patent Application Laid-Open No. 9-66565 discloses that a heat-sensitive adhesive sheet having a heat-sensitive adhesive layer provided on the back surface is sequentially supplied to the upper surface of a vertically movable table, as will be described in detail later. The paper is heated while being pressed while being adhered to the table or the surface of the already supplied heat-sensitive adhesive sheet, and a cut line of a predetermined shape is provided on these heat-sensitive adhesive sheets to form a laminate composed of a plurality of layers. However, there has been proposed a method of manufacturing a three-dimensional structure by removing unnecessary portions from the laminate.
【0005】前記した樹脂を利用して三次元造形物を得
る方法に共通する欠点は、造形物の精度が悪いことと、
造形物が不要になった場合の処理が問題になることであ
る。前記特開平9−66565号の感熱接着シートを用
いる方法は、樹脂を用いる方法と比較して精度は高く、
感熱接着シートとして感熱接着紙を用いた場合には樹脂
を用いた造形物に比較して焼却処理が容易な利点がある
が、感熱接着紙の熱接着効率が悪いため造形に長時間を
有することが欠点であった。特開平9−66565号に
はこの欠点を解決する手段については何ら開示されてい
ない。[0005] The disadvantages common to the above-described method of obtaining a three-dimensional object using the resin are that the accuracy of the object is poor,
The problem is that processing when the object becomes unnecessary becomes a problem. The method using the heat-sensitive adhesive sheet of JP-A-9-66565 has higher accuracy than the method using a resin,
When heat-sensitive adhesive paper is used as the heat-sensitive adhesive sheet, there is an advantage that the incineration treatment is easier compared to a molded article using resin, but the heat-bonding efficiency of the heat-sensitive adhesive paper is poor, so that the molding takes a long time. Was a drawback. JP-A-9-66565 does not disclose any means for solving this drawback.
【0006】本発明者等は、鋭意検討の結果、これらの
問題点を解決した感熱接着紙を開発することに成功し、
特願平11−183255号として既に特許出願を行っ
た。この先願発明による三次元造型機用の感熱接着紙
は、裏面に感熱接着剤層を設けた感熱接着紙を、上下動
可能な台の上面に順次供給し、この供給された感熱接着
紙の表面を押圧しながら加熱して上記台または既に供給
された感熱接着紙の表面に接着するとともに、これらの
感熱接着紙に所定形状の切断線を設けて複数の層から成
る積層体を形成し、この積層体から不要部分を除去する
ことにより三次元造形物を得る三次元造形機に使用する
感熱接着紙において、溶融温度が50〜150℃の感熱
接着剤層を、坪量40〜200g/m2 の基紙の裏面に
5〜30g/m2 設けたことを特徴とするものである。As a result of intensive studies, the present inventors have succeeded in developing a heat-sensitive adhesive paper which has solved these problems.
A patent application has already been filed as Japanese Patent Application No. 11-183255. The heat-sensitive adhesive paper for a three-dimensional molding machine according to the invention of the prior application is such that a heat-sensitive adhesive paper having a heat-sensitive adhesive layer provided on the back surface is sequentially supplied to the upper surface of a vertically movable table, and the surface of the supplied heat-sensitive adhesive paper is While pressing while heating, it adheres to the surface of the base or the already supplied heat-sensitive adhesive paper, and a cut line of a predetermined shape is provided on these heat-sensitive adhesive paper to form a laminate composed of a plurality of layers. In a heat-sensitive adhesive paper used for a three-dimensional printing machine that obtains a three-dimensional printing object by removing an unnecessary portion from a laminate, a heat-sensitive adhesive layer having a melting temperature of 50 to 150 ° C. has a basis weight of 40 to 200 g / m 2. 5 to 30 g / m 2 on the back surface of the base paper.
【0007】[0007]
【発明が解決しようとする課題】ところで、前述した鋳
物製造用の鋳型においては、高い寸法精度を要求される
分野があり、かような分野では一般に通常の室内環境
(20℃、40〜60%RH)で伸縮を0.3%以下に
抑えることが要求される。しかしながら、木型の鋳型の
場合に常につきまとう問題は、空気中の水分を木型が吸
放出することにより木型自身が伸縮してしまう点であ
る。また、本発明者らによる上記先願発明の感熱接着紙
を使用して造形した三次元造形物も上記したごとき高い
寸法精度を必ずしも満たすものではない。そのため上記
先願発明においては、塩化ビニリデンのような水蒸気透
過性の低い樹脂で三次元造形物表面を被覆することによ
り水分の吸放出を抑制し寸法精度を高めることを提案し
ている。Incidentally, there is a field in which high dimensional accuracy is required in the above-mentioned casting mold for manufacturing a casting, and in such a field, a general indoor environment (20 ° C., 40 to 60%) is generally used. RH) is required to suppress the expansion and contraction to 0.3% or less. However, a problem that is always encountered in the case of a wooden mold is that the wooden mold itself expands and contracts by absorbing and releasing moisture in the air. In addition, the three-dimensional structure formed by the present inventors using the heat-sensitive adhesive paper of the invention of the prior application does not necessarily satisfy the high dimensional accuracy as described above. Therefore, the above-mentioned prior application proposes that the surface of the three-dimensional structure is coated with a resin having low water vapor permeability such as vinylidene chloride to suppress the absorption and release of moisture and increase the dimensional accuracy.
【0008】しかしながら三次元造形物を造形した後に
被覆を施す場合には、被覆工程が追加的に必要となり、
製造コストを高める要因ともなるため、感熱接着紙自体
に高い寸法精度を付与することが望まれる。However, when coating is performed after forming a three-dimensional model, a coating step is additionally required,
It is desired to impart high dimensional accuracy to the heat-sensitive adhesive paper itself, because it also increases the manufacturing cost.
【0009】そこで本発明は、三次元造型機に好適に用
いることができる感熱接着性を備えるとともに、造形物
が空気中の水分を吸放出することによって伸縮するのを
効果的に抑制でき、造形物に被覆を施さずとも高い寸法
精度をもたらすことができる三次元造型機用の感熱接着
紙を提供することを課題とする。Accordingly, the present invention provides a heat-sensitive adhesive which can be suitably used for a three-dimensional molding machine, and can effectively suppress expansion and contraction of a molded article by absorbing and releasing moisture in the air. An object of the present invention is to provide a heat-sensitive adhesive paper for a three-dimensional molding machine that can provide high dimensional accuracy without applying a coating to an object.
【0010】[0010]
【課題を解決するための手段】本発明は、裏面に感熱接
着剤層を設けた感熱接着紙を、上下動可能な台の上面に
順次供給し、この供給された感熱接着紙の表面を押圧し
ながら加熱して上記台または既に供給された感熱接着紙
の表面に接着するとともに、これらの感熱接着紙に所定
形状の切断線を設けて複数の層から成る積層体を形成
し、この積層体から不要部分を除去することにより三次
元造形物を得る三次元造形機に使用する感熱接着紙にお
いて、溶融温度が50〜150℃の感熱接着剤層を坪量
40〜200g/m2 の基紙の裏面に5〜30g/m2
設けたこと、および前記基紙はセルロース繊維を主体と
しこれに熱接着性バインダー物質5〜60重量%を含有
させたものであることを特徴とする三次元造形機用の感
熱接着紙である。なお、本発明において溶融温度とは、
JIS K0064に規定する「化学製品の融点測定方
法」に準じて測定した値を意味する。According to the present invention, a heat-sensitive adhesive paper provided with a heat-sensitive adhesive layer on a back surface is sequentially supplied to an upper surface of a vertically movable table, and the surface of the supplied heat-sensitive adhesive paper is pressed. While heating to adhere to the table or the surface of the already supplied heat-sensitive adhesive paper, a cut line of a predetermined shape is provided on the heat-sensitive adhesive paper to form a laminate composed of a plurality of layers. In a heat-sensitive adhesive paper used for a three-dimensional printing machine that obtains a three-dimensional printing object by removing an unnecessary part from a paper, a heat-sensitive adhesive layer having a melting temperature of 50 to 150 ° C. is coated with a base paper having a basis weight of 40 to 200 g / m 2 . 5-30 g / m 2 on the back of
The heat-sensitive adhesive paper for a three-dimensional printing machine is characterized in that the base paper is mainly provided with cellulose fibers and contains a heat-adhesive binder substance in an amount of 5 to 60% by weight. In the present invention, the melting temperature is
It means a value measured according to “Method for measuring melting point of chemical products” specified in JIS K0064.
【0011】[0011]
【発明の実施の形態】本発明の三次元造形用の感熱接着
紙の使用方法を、三次元造形機の一例を挙げて説明す
る。図1は、前記特開平9−66565号公報の図7に
記載されている三次元造形機で、造形物を造形する状態
を示す構成図である。図1において、32は、上下に移
動可能な台であり、この上部に供給ロール33からガイ
ドロール34を介して、順次材料(感熱接着紙)31が
送られる。35は、台部32上を前後(図示では左右)
に移動する加熱ローラーであり、台部32上に送られた
材料31を台部32側に押圧しながら加熱することによ
り、材料31を台部32に接着またはすでに台部32に
送られた材料31にその上に送られた新たな材料31を
接着させる。36は台部32の上側に設けられ、台部3
2上を前後左右に移動可能な可動光ヘッドであり、ミラ
ー37を介してレーザー光源38から送られてくるレー
ザー光を台部32上に送り、台部32上の材料31を切
断するようになっている。DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for using a heat-sensitive adhesive paper for three-dimensional printing according to the present invention will be described with reference to an example of a three-dimensional printing machine. FIG. 1 is a configuration diagram showing a state in which a three-dimensional molding machine described in FIG. 7 of the above-mentioned Japanese Patent Application Laid-Open No. 9-66565 is producing a molded object. In FIG. 1, reference numeral 32 denotes a vertically movable table, on which a material (heat-sensitive adhesive paper) 31 is sequentially fed from a supply roll 33 via a guide roll 34. 35 is front and back on the base 32 (left and right in the figure)
The material 31 is fed to the base 32 or heated by pressing the material 31 onto the base 32 while pressing the material 31 toward the base 32, thereby bonding the material 31 to the base 32 or the material already fed to the base 32. The new material 31 sent thereon is bonded to 31. 36 is provided on the upper side of the base 32,
2 is a movable optical head that can move back and forth and right and left, and sends a laser beam sent from a laser light source 38 via a mirror 37 onto the base 32 to cut the material 31 on the base 32. Has become.
【0012】39は台部32を挟んでガイドロール34
に対向するように設けられたガイドロールであり、40
はガイドロール39を介して材料31の使用後の不要部
分を巻き取る巻き取りロールである。造形物を造形する
際には、まず、供給ロール33から繰り出した材料31
の先端部を巻き取りロール40に巻回し、加熱ローラー
35を台部32上で移動させて材料31を台部32に接
着させる。つぎに、レーザー光源38を作動させ可動光
ヘッド36を移動させながらレーザー光を発生させ、材
料31に所定形状の輪郭部41を切断するとともに、造
形に使用する部分の外周縁部に切断線42を、不要部分
に格子状の切断線43をそれぞれ入れる。Reference numeral 39 denotes a guide roll 34 sandwiching the base 32.
Guide rolls provided to face the
Is a take-up roll that takes up the unnecessary portion of the material 31 after use through the guide roll 39. When forming a molded article, first, the material 31 fed from the supply roll 33 is used.
Is wound around a take-up roll 40, and the heating roller 35 is moved on the base 32 to adhere the material 31 to the base 32. Next, a laser beam is generated while operating the laser light source 38 and moving the movable optical head 36, thereby cutting the contour 41 having a predetermined shape on the material 31 and cutting line 42 on the outer peripheral edge of the portion used for modeling. Are cut in the unnecessary portions, respectively.
【0013】そして、形成された層の厚み分だけ台部3
2を下降させたのち、巻き取りロール40を回転させ
て、新たな材料31を上記切断した材料31の上に配置
させ、上記の操作を繰り返すことにより多層からなる積
層体44を形成し、その積層体44から不要部分を除去
することにより造形物を得ることが行われる。Then, the base portion 3 is formed by the thickness of the formed layer.
2 is lowered, the take-up roll 40 is rotated, a new material 31 is placed on the cut material 31, and the above-described operation is repeated to form a multi-layer laminate 44. Obtaining an object by removing unnecessary portions from the laminate 44 is performed.
【0014】上記特開平9−66565号では、レーザ
ー光で切断する代わりに、カッターを用いることで、造
形物を構成する部分と不要部分が接着して不要部分の除
去が困難になることを防止するととともに、装置が安価
になるという提案を行っている。本発明の三次元造形機
用の感熱接着紙は、レーザー切断、カッター切断のいず
れにも使用可能な感熱接着紙を提供することができる。In Japanese Patent Application Laid-Open No. 9-66565, the use of a cutter instead of cutting with a laser beam prevents a portion constituting a modeled object from sticking to an unnecessary portion to prevent the removal of the unnecessary portion from becoming difficult. At the same time, a proposal has been made to make the device cheaper. The heat-sensitive adhesive paper for a three-dimensional printing machine of the present invention can provide a heat-sensitive adhesive paper that can be used for both laser cutting and cutter cutting.
【0015】次に本発明の感熱接着紙に使用する基紙に
ついて説明する。本発明で使用する基紙は、基本的には
前述した本発明者らによる先願発明(特願平11−18
3255号)の感熱接着紙に使用する基紙に所定量の熱
接着性バインダー物質を含ませたものである。Next, the base paper used for the heat-sensitive adhesive paper of the present invention will be described. The base paper used in the present invention is basically the same as the above-mentioned prior invention by the present inventors (Japanese Patent Application No. 11-18).
No. 3255) in which a predetermined amount of a heat-adhesive binder substance is contained in a base paper used for the heat-sensitive adhesive paper.
【0016】熱接着性バインダー物質を含ませた基紙を
用いて感熱接着紙を製造し、この感熱接着紙で三次元造
形機を用いて造形する場合には、加熱ローラーの熱によ
って基紙中の熱接着性バインダー物質が溶融或いは軟化
して粘着性を帯び、基紙を構成する主材料である木材パ
ルプや非木材パルプといったセルロース繊維に固着し、
繊維同士を結合させるバインダー効果が発現する結果、
感熱接着紙の積層物である造形物が空気中の水分を吸放
出しにくくなり伸縮が抑制される効果が得られることに
なる。When a heat-sensitive adhesive paper is manufactured using a base paper containing a heat-adhesive binder material and the heat-sensitive adhesive paper is formed using a three-dimensional printing machine, the heat of a heating roller causes the heat-sensitive adhesive paper to produce the heat-sensitive adhesive paper. The heat-adhesive binder material is melted or softened and becomes tacky and adheres to cellulose fibers such as wood pulp and non-wood pulp, which are the main materials constituting the base paper,
As a result of the binder effect of binding the fibers,
It is difficult for the molded article, which is a laminate of the heat-sensitive adhesive paper, to absorb and release moisture in the air, so that an effect of suppressing expansion and contraction can be obtained.
【0017】本発明で使用する熱接着性バインダー物質
としては、溶融温度が50〜180℃のものを使用する
ことが好ましい。50℃未満であると、基紙を重ねて保
存する際にブロッキングを起こしやすくなり、180℃
を超えると、造形時に加熱ローラーで加熱されても熱接
着性バインダー物質が溶融或いは軟化し難くなるからで
ある。なお、後述するように、基紙裏面に塗工する感熱
接着剤の溶融温度は150℃を超えると加熱ローラーで
加熱されても接着剤が溶融し難くなるため感熱接着紙同
士の接着性が悪くなるが、基紙に含有させる熱接着性バ
インダー物質はこれより高い180℃程度の溶融温度を
有する物質でも使用できる。なぜならば、基紙裏面の感
熱接着剤層には基紙を通して加熱ローラーの熱が伝達さ
れるが、基紙自体は加熱ローラーと直接接するため、感
熱接着剤の溶融温度よりも高い溶融温度を有する熱接着
性バインダー物質でも溶融或いは軟化できるからであ
る。The heat-adhesive binder used in the present invention preferably has a melting temperature of 50 to 180 ° C. When the temperature is lower than 50 ° C., blocking tends to occur when the base paper is stored in an overlapping state,
This is because, when the temperature exceeds the above range, the heat-adhesive binder substance is unlikely to be melted or softened even when heated by a heating roller during molding. In addition, as described later, when the melting temperature of the heat-sensitive adhesive applied to the base paper back surface exceeds 150 ° C., the adhesive becomes difficult to melt even when heated by a heating roller, so that the adhesiveness between the heat-sensitive adhesive papers is poor. However, as the heat-adhesive binder substance contained in the base paper, a substance having a higher melting temperature of about 180 ° C. can be used. This is because the heat of the heating roller is transmitted through the base paper to the heat-sensitive adhesive layer on the back surface of the base paper, but since the base paper itself is in direct contact with the heating roller, it has a melting temperature higher than the melting temperature of the heat-sensitive adhesive. This is because even a heat-adhesive binder substance can be melted or softened.
【0018】熱接着性バインダー物質を基紙に含有させ
る割合は、基紙全体の重量に対して5〜60重量%の範
囲とする。5重量%未満では、熱接着性バインダー物質
のセルロース繊維に対するバインダー効果が十分に得ら
れず、所期の水分の吸放出抑制効果が得られなくなる。
一方、60重量%を超えて含有させた場合には、基紙の
抄造時にシリンダードライヤーの表面に熱接着性バイン
ダー物質の一部が軟化して付着しドライヤーを汚しやす
くなり、抄造後に基紙に熱接着性バインダー物質を含浸
させる場合にも、ペーパーロールに熱接着性バインダー
物質が付着してロールを汚しやすくなる。The proportion of the heat-adhesive binder substance contained in the base paper is in the range of 5 to 60% by weight based on the total weight of the base paper. If the content is less than 5% by weight, the binder effect of the thermoadhesive binder substance on the cellulose fibers cannot be sufficiently obtained, and the desired effect of suppressing the absorption and release of water cannot be obtained.
On the other hand, when the content exceeds 60% by weight, a part of the heat-adhesive binder substance softens and adheres to the surface of the cylinder dryer during the papermaking of the base paper, so that the dryer is easily stained. Even in the case of impregnating the heat-adhesive binder substance, the heat-adhesive binder substance adheres to the paper roll, and the roll is easily stained.
【0019】基紙に熱接着性バインダー物質を含ませる
方法としては、例えば以下のような方法を採用すること
ができる。 1)熱接着性バインダー物質として熱接着性繊維を紙料
に添加して基紙を抄造する方法、 2)熱接着性バインダー物質として熱接着性粒子を紙料
に添加して基紙を抄造する方法、 3)基紙の抄造途中や抄造後に、基紙に熱接着性バイン
ダー物質を含浸する方法、 4)上記方法の組み合わせによる方法。As a method for incorporating the heat-adhesive binder substance into the base paper, for example, the following method can be adopted. 1) A method of adding a heat-adhesive fiber to a stock as a heat-adhesive binder material to form a base paper; 2) Adding a heat-adhesive particle to a stock as a heat-adhesive binder material to form a base paper. 3) A method of impregnating the base paper with a heat-adhesive binder substance during or after the papermaking of the base paper, 4) A method by a combination of the above methods.
【0020】上記した方法を用いて熱接着性バインダー
物質を含ませた基紙を製造する方法についてさらに具体
的に説明する。 1)熱接着性繊維を紙料に添加して抄造する方法 広葉樹晒クラフトパルプ(LBKP)、針葉樹晒クラフ
トパルプ(NBKP)、広葉樹晒サルファイトパルプ
(LBSP)、針葉樹晒サルファイトパルプ(NBS
P)などの化学パルプや、砕木パルプ(GP)、サーモ
メカニカルパルプ(TMP)などの機械パルプといった
木材パルプや、コットンパルプ、麻、バガス、ケナフ、
エスパルト、楮、三椏、雁皮などの非木材パルプの単独
あるいは2種類以上を併用してなるセルロース繊維に、
熱接着性繊維を所定量添加し、これにデンプン、ポリア
クリルアミドなどの乾燥紙力増強剤、ポリアミド・ポリ
アミン・エピクロルヒドリン樹脂、尿素ホルマリン樹
脂、メラミンホルマリン樹脂などの湿潤紙力増強剤、ロ
ジン系、アルキルケテンダイマー系、アルケニル無水コ
ハク酸系、スチレン−アクリル系、無水ステアリン酸
系、石油樹脂系などのサイズ剤、硫酸バンド、塩化アル
ミニウム、アルミン酸ソーダ、塩基性塩化アルミニウ
ム、塩基性ポリ水酸化アルミニウムなどの定着剤、歩留
り向上剤、濾水性向上剤、消泡剤、染料、着色顔料など
を適宜配合した紙料を、通常フリーネス250〜550
mlC.S.F.に調製し、長網抄紙機や円網抄紙機な
どの公知の抄紙機を使用して抄紙することで得られる。
この際、抄紙途上で紙面に澱粉、ポリビニルアルコー
ル、各種表面サイズなどの助剤をサイズプレス装置など
で塗工することも可能である。さらに必要に応じ、マシ
ンカレンダー処理やスーパーカレンダー処理を施し、表
面平滑性を向上させることも適宜行われる。A method for producing a base paper containing a heat-adhesive binder substance by using the above method will be described more specifically. 1) A method of adding heat-adhesive fiber to paper to form a paper stock Hardwood bleached kraft pulp (LBKP), softwood bleached kraft pulp (NBKP), hardwood bleached sulphite pulp (LBSP), softwood bleached sulphite pulp (NBS)
Wood pulp such as chemical pulp such as P), mechanical pulp such as groundwood pulp (GP) and thermomechanical pulp (TMP), cotton pulp, hemp, bagasse, kenaf,
Non-wood pulp such as esparto, mulberry, mitsumata, ganpi etc. alone or in combination with two or more types of cellulose fiber,
A predetermined amount of heat-adhesive fiber is added, and a dry paper strength agent such as starch and polyacrylamide, a wet paper strength agent such as polyamide / polyamine / epichlorohydrin resin, urea formalin resin, melamine formalin resin, rosin-based, alkyl Ketene dimer type, alkenyl succinic anhydride type, styrene-acrylic type, stearic anhydride type, petroleum resin type, etc., sulphate band, aluminum chloride, sodium aluminate, basic aluminum chloride, basic polyaluminum hydroxide, etc. A paper material appropriately mixed with a fixing agent, a retention improver, a drainage improver, an antifoaming agent, a dye, a color pigment and the like is usually used in a freeness of 250 to 550.
mlC. S. F. And a paper machine using a known paper machine such as a fourdrinier paper machine or a circular net paper machine.
At this time, it is also possible to apply an auxiliary agent such as starch, polyvinyl alcohol, or various surface sizes to the paper surface during the paper making by a size press device or the like. Further, if necessary, a machine calendering treatment or a super calendering treatment is performed to appropriately improve the surface smoothness.
【0021】本発明においては、基紙を抄紙するに際し
て、湿潤紙力増強剤を併用することが好ましい。湿潤紙
力増強剤を用いることで、造形後の造形物が空気中の水
分を吸収して伸び、時間の経過とともに変形する現象を
より一層低減できるからである。In the present invention, it is preferable to use a wet paper strength enhancer in combination with the papermaking of the base paper. By using the wet paper strength enhancer, it is possible to further reduce the phenomenon that the molded article after molding absorbs moisture in the air and expands, and is deformed over time.
【0022】熱接着性繊維の代表的な例としては、ポリ
オレフィン系の合成パルプを挙げることができる。ポリ
オレフィン系合成パルプには、例えばポリエチレンやポ
リプロピレンを原料としてフラッシュ法と呼ばれる周知
の方法で製造したものがあり、市販品として入手できる
(例えば商品名「SWP」、三井化学(株)製)。A typical example of the heat-adhesive fiber is a polyolefin-based synthetic pulp. Polyolefin synthetic pulp includes, for example, those manufactured by a well-known method called a flash method using polyethylene or polypropylene as a raw material, and is available as a commercial product (for example, trade name “SWP”, manufactured by Mitsui Chemicals, Inc.).
【0023】熱接着性繊維としては、例えばポリエチレ
ン、ポリエチレンテレフタレート、エチレン−酢酸ビニ
ル共重合体、ナイロン、塩化ビニル−酢酸ビニル共重合
体などの熱可塑性樹脂から形成された単繊維も使用する
ことができる。As the heat-adhesive fiber, it is also possible to use a single fiber formed of a thermoplastic resin such as polyethylene, polyethylene terephthalate, ethylene-vinyl acetate copolymer, nylon, vinyl chloride-vinyl acetate copolymer and the like. it can.
【0024】繊維の表面に比較的溶融しやすい熱接着性
樹脂からなる接着性部分を備えるとともに、この繊維の
軸方向に沿って比較的溶融し難い又は溶融しない材料で
形成された非接着性部分を備えたいわゆる複合繊維も、
熱接着性繊維として使用できる。かような複合繊維は、
加熱によって接着性部分が周囲のセルロース繊維と接着
し、加熱によっても溶融又は変形しにくい繊維状の非接
着性部分も残存するため、良好な三次元ネットワーク構
造を維持できるために好ましい。A non-adhesive portion made of a material that is relatively hard to melt or does not melt along the axial direction of the fiber, while having an adhesive portion made of a heat-adhesive resin that is relatively easy to melt on the surface of the fiber. So-called composite fibers with
It can be used as a heat-adhesive fiber. Such composite fibers are
The adhesive portion adheres to the surrounding cellulose fibers by heating, and a fibrous non-adhesive portion that is not easily melted or deformed even by heating remains, which is preferable because a good three-dimensional network structure can be maintained.
【0025】そのような複合繊維としては、例えば、加
熱処理によって溶融可能な材料で形成された鞘部分と、
同じ加熱処理によって鞘部分と比べて溶融し難いか又は
溶融しない材料で形成された芯部分とを備える芯鞘構造
の複合繊維を例示することができる。より具体的には、
溶融温度又は軟化温度が互いに異なる2種の熱可塑性樹
脂を用いて、相対的に溶融温度又は軟化温度が高い樹脂
で芯部分を形成し、相対的に溶融温度又は軟化温度が低
い樹脂で鞘部分を形成した芯鞘構造の複合繊維を用いる
ことができる。芯鞘構造を構成する樹脂の組み合わせを
例示すると、ポリプロピレン/ポリエチレン、ポリプロ
ピレン/エチレン−酢酸ビニル共重合体、ポリエチレン
テレフタレート/ポリエチレン、ポリエチレンテレフタ
レート/ポリエチレンテレフタレート、ポリエチレンテ
レフタレート/ポリプロピレン、ポリエチレンテレフタ
レート/エチレン−酢酸ビニル共重合体、ナイロン/ナ
イロン等がある(斜線の左側が芯部分、右側が鞘部分を
表す)。芯鞘構造の複合繊維としては、鞘部分の中に1
本の芯部分が形成されたものだけでなく、鞘部分の中に
複数本の芯部分が並行に配列されたものも使用すること
ができる。As such a composite fiber, for example, a sheath portion formed of a material that can be melted by heat treatment,
A conjugate fiber having a core-sheath structure including a core portion formed of a material that is harder to melt or is not melted compared to the sheath portion by the same heat treatment can be exemplified. More specifically,
Using two kinds of thermoplastic resins whose melting temperature or softening temperature are different from each other, the core portion is formed by a resin having a relatively high melting temperature or softening temperature, and a sheath portion is formed by a resin having a relatively low melting temperature or softening temperature. Can be used. Examples of combinations of resins constituting the core-sheath structure include polypropylene / polyethylene, polypropylene / ethylene-vinyl acetate copolymer, polyethylene terephthalate / polyethylene, polyethylene terephthalate / polyethylene terephthalate, polyethylene terephthalate / polypropylene, and polyethylene terephthalate / ethylene-vinyl acetate. There are copolymers, nylon / nylon, and the like (the left side of the hatched portion represents the core portion, and the right side represents the sheath portion). As a composite fiber having a core-sheath structure, 1
Not only one having a core portion formed thereon but also one having a plurality of core portions arranged in parallel in a sheath portion can be used.
【0026】また、加熱処理によって溶融可能な材料で
形成された第一の部分と、同じ加熱処理によって第一の
部分と比べて溶融し難いか又は溶融しない材料で形成さ
れた第二の部分とを、繊維の軸方向に沿って並行に配列
し一体化したサイドバイサイド構造の複合繊維を例示で
きる。より具体的には、溶融温度又は軟化温度が互いに
異なる2種の熱可塑性樹脂を用いて、前記の第一の部分
と第二の部分とを形成したサイドバイサイド構造の複合
繊維を用いることもできる。A first portion formed of a material that can be melted by the heat treatment, and a second portion formed of a material that is harder to melt or less meltable than the first portion by the same heat treatment. Can be exemplified as a composite fiber having a side-by-side structure in which the fibers are arranged in parallel along the axial direction of the fiber and integrated. More specifically, a composite fiber having a side-by-side structure in which the first portion and the second portion are formed using two types of thermoplastic resins having different melting temperatures or different softening temperatures can be used.
【0027】2)熱接着性粒子を紙料に添加して抄造す
る方法 ポリエチレン樹脂、ポリ塩化ビニル樹脂、ポリエステル
樹脂、ポリ酢酸ビニル樹脂、エチレン酢酸ビニル共重合
体樹脂、ポリアクリル酸エステル樹脂等を粉砕処理して
粒子状にしたもの、あるいはこの粒子状物をエマルジョ
ンやディスパージョンの状態としたものを、前記1)の
方法で述べたと同様な紙料中に添加し、この紙料を用い
て基紙を抄造する。2) Method of paper-making by adding heat-adhesive particles to paper stock Polyethylene resin, polyvinyl chloride resin, polyester resin, polyvinyl acetate resin, ethylene-vinyl acetate copolymer resin, polyacrylate resin, etc. A material that has been pulverized into particles or a material obtained by converting the particles into an emulsion or dispersion is added to the same stock as described in the above method 1), and the obtained stock is used. Make a base paper.
【0028】3)基紙の抄造途中や抄造後に、基紙に熱
接着性バインダー物質を含浸する方法 前記1)の方法で述べたと同様な紙料を用いて基紙を抄
造する際に、抄造途中に設置されたサイズプレス装置等
の装置を使用して基紙に熱接着性バインダー物質を含浸
するか、或いは基紙を抄造した後に含浸装置を使用して
熱接着性バインダー物質を基紙に含浸する。3) A method of impregnating the base paper with a heat-adhesive binder substance during or after the formation of the base paper When the base paper is formed using the same stock as described in the method 1) above, The base paper is impregnated with the heat-adhesive binder substance using a device such as a size press installed in the middle, or the heat-adhesive binder substance is converted into the base paper using the impregnation apparatus after the base paper is formed. Impregnate.
【0029】含浸させる熱接着性バインダー物質として
は、例えばポリ塩化ビニル樹脂、ポリ酢酸ビニル樹脂、
塩化ビニル−酢酸ビニル共重合樹脂、ポリエチレン樹
脂、エチレン−酢酸ビニル共重合樹脂、アクリル酸エス
テル共重合樹脂、ポリアミド樹脂、塩素化ポリプロピレ
ン樹脂、不飽和ポリエステル樹脂、ポリウレタン樹脂、
変性ポリビニルアルコール樹脂等の熱可塑性樹脂を、水
または有機溶剤に溶解した樹脂溶液や水系エマルジョン
あるいはディスパージョンを用いることができる。Examples of the heat-adhesive binder material to be impregnated include polyvinyl chloride resin, polyvinyl acetate resin,
Vinyl chloride-vinyl acetate copolymer resin, polyethylene resin, ethylene-vinyl acetate copolymer resin, acrylate copolymer resin, polyamide resin, chlorinated polypropylene resin, unsaturated polyester resin, polyurethane resin,
A resin solution in which a thermoplastic resin such as a modified polyvinyl alcohol resin or the like is dissolved in water or an organic solvent, an aqueous emulsion, or a dispersion can be used.
【0030】4)上記方法の組み合わせによる方法、 前記1)から3)の方法を適宜組み合わせた方法を採用
することもできる。その一例として、熱接着性繊維と熱
接着性粒子を紙料に添加して基紙を抄造し、さらに熱接
着性バインダー物質を含浸する方法を挙げることができ
る。4) A method based on a combination of the above methods, and a method appropriately combining the above methods 1) to 3) can also be adopted. As an example thereof, a method of adding a heat-adhesive fiber and heat-adhesive particles to a stock to form a base paper and further impregnating with a heat-adhesive binder substance can be mentioned.
【0031】本発明においては、基紙の坪量は、40〜
200g/m2 、より好ましくは60〜120g/m2
とする。坪量が40g/m2 未満では、所定の厚みに造
形するの に長時間掛かり効率が悪くなり、坪量が20
0g/m2 を越すと熱接着効率が悪くなり感熱接着紙同
士の接着力が不足するからである。基紙の坪量を、60
〜120g/m2 とするとこの生産効率と熱接着効率の
バランスがよくなる。In the present invention, the basis weight of the base paper is from 40 to
200 g / m 2 , more preferably 60 to 120 g / m 2
And When the grammage is less than 40 g / m 2 , it takes a long time to form a predetermined thickness, and the efficiency becomes poor.
If it exceeds 0 g / m 2 , the heat bonding efficiency will be poor and the bonding strength between the heat-sensitive adhesive papers will be insufficient. When the basis weight of the base paper is 60
When it is set to 120 g / m 2 , the balance between the production efficiency and the heat bonding efficiency is improved.
【0032】本発明においては、基紙に防湿層をさらに
設けることができる。かような構成とすることで造形後
の造形物が空気中の水分を吸収して伸び、時間の経過と
ともに変形することをさらに低減できるからである。防
湿層は、塩化ビニリデン樹脂などの防湿効果の大きな樹
脂を通常2〜15g/m2 基紙の片面若しくは両面に塗
工するなどの方法により設ける。In the present invention, a moisture-proof layer can be further provided on the base paper. By adopting such a configuration, it is possible to further reduce the possibility that the molded article after molding absorbs moisture in the air and expands, and is deformed over time. The moisture-proof layer is formed by applying a resin having a large moisture-proof effect, such as a vinylidene chloride resin, to one or both sides of a 2 to 15 g / m 2 base paper.
【0033】本発明に使用する感熱接着剤は、例えば、
アクリル酸エステル共重合体、メタアクリル酸エステル
共重合体、ポリ酢酸ビニル、酢酸ビニル−アクリル共重
合体、エチレン−酢酸ビニル共重合体、エチレン−酢酸
ビニル−アクリル共重合体、塩化ビニル−エチレン共重
合体、不飽和ポリエステル樹脂、アイオノマー樹脂、S
BR、MBR、NBRなどの熱可塑性樹脂を主体とし、
これに各種の可塑剤やワックス類等の添加剤を必要に応
じて添加したもので、熱可塑性樹脂に各種添加剤を添加
した状態での溶融温度が50〜150℃のものが使用で
きる。50℃より低いと用紙を保存中にブロッキングを
起し、150℃を超えると熱による接着が極端に悪くな
るからである。The heat-sensitive adhesive used in the present invention is, for example,
Acrylate copolymer, methacrylate copolymer, polyvinyl acetate, vinyl acetate-acryl copolymer, ethylene-vinyl acetate copolymer, ethylene-vinyl acetate-acryl copolymer, vinyl chloride-ethylene copolymer Polymer, unsaturated polyester resin, ionomer resin, S
Mainly thermoplastic resin such as BR, MBR, NBR,
Additives such as various plasticizers and waxes are added to this as needed, and those having a melting temperature of 50 to 150 ° C. in a state where various additives are added to a thermoplastic resin can be used. If the temperature is lower than 50 ° C., blocking occurs during storage of the paper, and if it is higher than 150 ° C., adhesion by heat becomes extremely poor.
【0034】感熱接着剤の形態としては、水系、溶剤
系、ホットメルト系のいずれの形態でも良いが、溶剤系
の感熱接着剤を使用する場合は、基紙に溶剤の浸透を防
止する加工を施さなければならないので、本発明では水
系の感熱接着剤を使用することが好ましい。The form of the heat-sensitive adhesive may be any of a water-based, solvent-based, and hot-melt-based adhesive. However, when a solvent-based heat-sensitive adhesive is used, a process for preventing the penetration of the solvent into the base paper is required. In the present invention, it is preferable to use a water-based heat-sensitive adhesive since it must be applied.
【0035】感熱接着剤に用いる熱可塑性樹脂に添加す
る前記可塑剤としては、フタル酸ジシクロヘキシル、フ
タル酸ジヘキシルなどの公知の可塑剤を使用できる。こ
れにより、感熱接着紙を加熱積層するときに熱可塑性樹
脂が容易に粘着化し、可塑剤を添加しない場合より低温
で、要求される接着強度を出すことができる。また本発
明では、天然ワックスや合成ワックスなどのワックス類
を熱可塑性樹脂に添加することができる。これにより、
ガラス転移温度が低い樹脂を使用してもブロッキングを
防止できるからである。この他の添加剤として、各種填
料、染料や顔料等の着色剤、老化防止剤、増粘剤等を使
用できる。As the plasticizer added to the thermoplastic resin used for the heat-sensitive adhesive, known plasticizers such as dicyclohexyl phthalate and dihexyl phthalate can be used. Thereby, the thermoplastic resin easily sticks when the heat-sensitive adhesive paper is heated and laminated, and the required adhesive strength can be obtained at a lower temperature than when no plasticizer is added. In the present invention, waxes such as natural wax and synthetic wax can be added to the thermoplastic resin. This allows
This is because blocking can be prevented even when a resin having a low glass transition temperature is used. As other additives, various fillers, coloring agents such as dyes and pigments, antioxidants, thickeners and the like can be used.
【0036】本発明の感熱接着紙を使用して三次元造形
物を造形するに際しては、感熱接着紙のホットタック性
がよいことが好ましい場合がある。ホットタック性は、
例えば菓子類を軽包装材(通常は感熱接着剤層を設けた
高分子フィルム)の袋に充填して高速自動包装する場合
に、非常に重要視される特性の一つである。高速自動包
装機にかけられた包装材の袋の接着部は、金属で挟まれ
素早く加熱され、加圧下で熱接着される。熱接着部は接
着層が未だ溶融しているときに加圧状態から解放され
る。袋の底に当たる部分がこのような状態のときに内容
物(菓子類)が高速度で充填されるので、内容物の荷重
のために未だ溶融状態の接着部分は押し剥がされる作用
を受ける。熱接着部のホットタック性とは、接着剤が冷
えて凝固する前の溶融状態でその接着が完全な状態を保
つことを言い、ホットタック性がよいことは充填工程や
接着工程をより高速度で行うことができることを意味す
る。In forming a three-dimensional structure using the heat-sensitive adhesive paper of the present invention, it is sometimes preferable that the heat-sensitive adhesive paper has good hot tack properties. Hot tack is
For example, when confectionery is filled in a bag of a light packaging material (usually a polymer film provided with a heat-sensitive adhesive layer) for high-speed automatic packaging, this is one of the characteristics that are very important. The bonded portion of the bag of the packaging material put on the high-speed automatic packaging machine is sandwiched between metals, heated quickly, and thermally bonded under pressure. The thermal bond is released from the pressurized state when the adhesive layer is still molten. When the portion hitting the bottom of the bag is in such a state, the contents (confectionery) are filled at a high speed, so that the adhesive portion still in the molten state is subjected to the action of being peeled off due to the load of the contents. The hot tack property of the heat-bonded part means that the adhesive keeps its perfect state in the molten state before the adhesive cools and solidifies, and the good hot tack property means that the filling process and the bonding process can be performed at a higher speed. Means that you can do it with
【0037】本発明においては、ホットタック性の評価
に際して“ホットタック値”という数値を用いて評価す
る。このホットタック値は、ヒートシールテスター(商
品名「ヒートシールテスターTP701A」、テスター
産業(株)製造)で測定した値を意味する。図2は、そ
の測定原理を示した図である。3は上部シールバー(幅
25mm×長さ300mm)、4は下部シールバーであ
る。試料2、すなわち2枚の感熱接着紙は長尺シート状
で準備され、その表面と裏面(感熱接着剤塗工面)とが
重なるようにして、上部シールバー3と下部シールバー
4とに挟まれるように設置される。2枚の試料2には、
それぞれ直径Rmmのガイドロール1を介して、角度θ
度をもってWgの荷重が掛けられている。この時点では
試料の繰り出し部分を2×Wgの荷重で引っ張り、試料
が動かないようにしてある。上部シールバー3は降下し
て試料を下部シールバー4との間でシール幅25mm×
シール長300mm、加重QkgでS秒圧着シール後上
昇する。上部シールバー3は加温が可能でありシール温
度をT℃に設定することができる。シール後、上部シー
ルバー3が上昇すると同時に、試料の繰り出し部分に掛
かっていた2×Wgの荷重が解放され、試料の先端にそ
れぞれ掛かっている荷重Wgによって、シールされた2
枚の試料が瞬間的に剥がされる。そのとき剥がされた長
尺方向の距離を測定しホットタック値(mm)とする。
すなわちホットタック値が低いほど、ホットタック性が
良好であることを意味する。In the present invention, when the hot tack property is evaluated, it is evaluated using a numerical value called "hot tack value". This hot tack value means a value measured by a heat seal tester (trade name “heat seal tester TP701A”, manufactured by Tester Sangyo Co., Ltd.). FIG. 2 shows the principle of the measurement. 3 is an upper seal bar (25 mm in width x 300 mm in length), and 4 is a lower seal bar. Sample 2, that is, two sheets of heat-sensitive adhesive paper are prepared in the form of a long sheet, and are sandwiched between the upper seal bar 3 and the lower seal bar 4 such that the front surface and the back surface (heat-sensitive adhesive-coated surface) overlap. Is installed as follows. In two samples 2,
Through the guide rolls 1 each having a diameter of Rmm, the angle θ
A load of Wg is applied with a certain degree. At this time, the extended portion of the sample is pulled by a load of 2 × Wg so that the sample does not move. The upper seal bar 3 descends to transfer the sample between the lower seal bar 4 and the seal width 25 mm.
The seal length is 300 mm and the weight is Qkg. The upper seal bar 3 can be heated, and the seal temperature can be set to T ° C. After the sealing, the upper seal bar 3 is lifted, and at the same time, the load of 2 × Wg applied to the feeding portion of the sample is released, and the seal 2 is sealed by the load Wg applied to the tip of the sample.
The samples are instantaneously peeled off. The distance in the long direction peeled off at that time is measured and defined as a hot tack value (mm).
That is, the lower the hot tack value, the better the hot tack property.
【0038】本発明の感熱接着紙を用いて三次元造形物
を造形する際に、例えば緊急に造形物を製造すべき事態
が発生して三次元造型機のスピードをアップをしようと
すると、つまり加熱ローラーの往復スピードを速めよう
とすると、感熱接着剤の溶融が不十分になり接着不良を
起こすことがある。これを解決するためには加熱ローラ
ーの温度を高くすればよい。しかしこのばあい、感熱接
着剤は過溶融状態になるので、加熱ローラーから受けた
熱を外気に放熱する量より造形物内部にこもる量が多く
なり、感熱接着剤の固化が遅延して内部歪みで造形物を
変形させる(接着剤が積層体の厚み方向にマイグレーシ
ョンして膨れる)という問題を生ずることがある。本発
明者らはこの問題を解決することを目的に種々検討した
結果、感熱接着剤のホットタック値がある値以下である
とこの変形が起こりにくくなることを発見した。When molding a three-dimensional molded article using the heat-sensitive adhesive paper of the present invention, for example, when a situation in which the molded article is to be produced urgently is attempted to increase the speed of the three-dimensional molding machine, If an attempt is made to increase the reciprocating speed of the heating roller, the heat-sensitive adhesive may be insufficiently melted to cause poor bonding. In order to solve this, the temperature of the heating roller may be increased. However, in this case, the heat-sensitive adhesive is in an over-molten state, so the amount of heat trapped inside the modeled object is larger than the amount of heat received from the heating roller radiated to the outside air, and the solidification of the heat-sensitive adhesive is delayed, causing internal distortion. This may cause a problem that the molded article is deformed (the adhesive migrates and swells in the thickness direction of the laminate). As a result of various studies aimed at solving this problem, the present inventors have found that this deformation is unlikely to occur when the hot tack value of the heat-sensitive adhesive is below a certain value.
【0039】本発明者らが検討した結果、図2に示した
ヒートシールテスターにおけるガイドロールの直径が2
0mm、上部シールバーの圧着荷重が1kg/cm2 、
圧着時間が1秒、試料の先端に掛かる加重Wがそれぞれ
30g、角度θが20度、シール温度が〔接着剤の溶融
温度+30〕℃のときのホットタック値が、造形物の内
部歪みによる変形を評価する指標として適切であり、こ
の値が30mm以下であると接着剤が過溶融状態になっ
ても内部歪みで造形物を変形させる問題は起こらない。
また、ホットタック値が30mm以下の感熱接着紙を使
用すれば、三次元造型機の運転者にとって、造形スピー
ドや加熱ローラーの温度等の工程管理に熟練を必要とし
ないという利点も生まれる。As a result of investigations by the present inventors, the diameter of the guide roll in the heat seal tester shown in FIG.
0 mm, the pressure load of the upper seal bar is 1 kg / cm 2 ,
The hot tack value when the compression time is 1 second, the weight W applied to the tip of the sample is 30 g, the angle θ is 20 degrees, and the sealing temperature is [the melting temperature of the adhesive + 30] ° C, is the deformation due to the internal distortion of the modeled object. When the value is 30 mm or less, there is no problem that the molded article is deformed due to internal strain even if the adhesive is in an over-melted state.
In addition, if a heat-sensitive adhesive paper having a hot tack value of 30 mm or less is used, there is also an advantage that a driver of a three-dimensional molding machine does not require skill in process control such as molding speed and temperature of a heating roller.
【0040】ホットタック性は、感熱接着剤が溶融状態
から冷えて凝固するまでそのシールが完全な状態を保つ
ことを言うので、一般的には、接着剤の凝集力や粘度と
相関が高い。ホットタック値を30mm以下にするに
は、一義的な手法があるわけではなく、一般的に、凝集
力や粘度を高めればよく、感熱接着剤の分子量、粘着付
与剤の添加、溶融時の弾性率などを考慮すればよい。た
だし、他の物性や要因、例えば感熱接着剤の溶融温度や
塗工量などと総合して設計することが重要であることは
言うまでもない。Hot tack refers to the fact that the heat-sensitive adhesive keeps its seal intact from the molten state until it cools and solidifies, and is generally highly correlated with the cohesive strength and viscosity of the adhesive. There is no unique method to reduce the hot tack value to 30 mm or less. Generally, it is sufficient to increase the cohesive strength and viscosity, and the molecular weight of the heat-sensitive adhesive, the addition of a tackifier, and the elasticity during melting. The rate may be considered. However, it goes without saying that it is important to design in consideration of other physical properties and factors, such as the melting temperature of the heat-sensitive adhesive and the amount of coating.
【0041】また、本発明者らが種々検討した結果で
は、上記感熱接着剤が、エチレン−酢酸ビニル共重合体
樹脂系であり、その溶融温度が60〜90℃であるも
の、また上記感熱接着剤がエチレン−酢酸ビニル共重合
体樹脂系とワックスとの混合物であり、その溶融温度が
60〜90℃であるものが、熱接着効率も良く、耐ブロ
ッキング性にも優れるので本発明に特に好適に使用でき
ることが判った。According to the results of various studies conducted by the present inventors, the heat-sensitive adhesive is an ethylene-vinyl acetate copolymer resin having a melting temperature of 60 to 90 ° C. The agent is a mixture of an ethylene-vinyl acetate copolymer resin and a wax, and the one having a melting temperature of 60 to 90 ° C. is particularly suitable for the present invention because of its good heat bonding efficiency and excellent blocking resistance. It turned out that it could be used.
【0042】感熱接着剤は、塗工液が水系の場合には、
通常エアナイフコーター、ブレードコーター、ロールコ
ーターなど、溶剤系の場合にはグラビアコーター、ロー
ルコーターなど、ホットメルト系にはホットメルトコー
ター、イクストルージョンコーターなどの塗工機を使用
して基紙の裏面に塗工する。塗工量は、5〜30g/m
2 (乾燥重量換算)、好ましくは10〜25g/m2 と
する。塗工量が5g/m2 より低いと、接着性が悪くな
り、また30g/m2 を超えるとブロッキングを起こし
易くなり、また接着性は飽和しこれ以上塗工することは
経済的に不利になるからである。When the coating liquid is water-based, the heat-sensitive adhesive is
Normally, using a coating machine such as an air knife coater, blade coater or roll coater, a gravure coater or a roll coater for solvent type, or a hot melt coater or extrusion coater for hot melt type. Apply to Coating amount is 5 to 30 g / m
2 (in terms of dry weight), preferably 10 to 25 g / m 2 . If the coating amount is less than 5 g / m 2 , the adhesiveness will be poor, and if it exceeds 30 g / m 2 , blocking will easily occur, and the adhesiveness will be saturated and it will be economically disadvantageous to apply further. Because it becomes.
【0043】本発明では、感熱接着剤を基紙に塗工する
に際して、感熱接着剤層の表面に微細な凹凸形状を形成
することが特に好ましい。こうすることで感熱接着紙を
保存中に接着剤表面は凸部で「点接触」状態になり、耐
ブロッキングを向上できるからである。In the present invention, when applying the heat-sensitive adhesive to the base paper, it is particularly preferable to form fine irregularities on the surface of the heat-sensitive adhesive layer. By doing so, the surface of the adhesive becomes "point contact" at the convex portion during storage of the heat-sensitive adhesive paper, and blocking resistance can be improved.
【0044】感熱接着剤層の表面に微細な凹凸形状を形
成する手段はいかなる手段を採用してもよいが、感熱接
着剤に粉体を添加すること、感熱接着剤層の塗工量を部
分的に変化させることで形成することが簡便な方法であ
り、本発明では好適に採用できる。Any means may be used to form the fine irregularities on the surface of the heat-sensitive adhesive layer. However, adding powder to the heat-sensitive adhesive and reducing the coating amount of the heat-sensitive adhesive layer It is a simple method to form the film by changing the thickness, and the method can be suitably adopted in the present invention.
【0045】感熱接着剤に添加する粉体としては、例え
ばセルロースパウダー、澱粉粒子、ガラスビーズ、ポリ
エチレン粒子、シリカ粒子等でブロッキングを防止する
効果が大きく、接着力を低下する割合が低いものが好適
に使用できる。通常はこれら粉体の粒子径3〜200μ
mのものを使用する。As the powder to be added to the heat-sensitive adhesive, it is preferable to use, for example, cellulose powder, starch particles, glass beads, polyethylene particles, silica particles, etc., which have a large effect of preventing blocking and a low rate of lowering the adhesive force. Can be used for Usually, the particle diameter of these powders is 3 to 200 μm.
m.
【0046】また、感熱接着剤層の塗工量を部分的に変
化させて微細な凹凸形状を形成する手段としては、接着
剤塗工をグラビア塗工機で行い、所定形状の凹部分を設
けたグラビアロールの凹部に接着剤を満たして基紙に転
写することで所定形状の凹凸を形成する方法や、塗工液
粘度を高くしてロールコーターで塗工して凹凸の筋状の
塗工面を形成する方法や、塗工直後の塗工面をワイヤバ
ーで擦ることでワイヤ筋を形成させる方法などを採用で
きる。As a means for forming a fine uneven shape by partially changing the coating amount of the heat-sensitive adhesive layer, the adhesive is applied by a gravure coating machine and a concave portion having a predetermined shape is provided. A method of forming irregularities of a predetermined shape by filling the concave portion of the gravure roll with an adhesive and transferring it to the base paper, or applying a coating liquid with a high coating solution viscosity and applying a roll coater to form a streaky coated surface of the irregularities And a method of forming wire streaks by rubbing the coated surface immediately after coating with a wire bar.
【0047】このようにして製造した表面が微細な凹凸
形状である感熱接着剤層を有する感熱接着紙を使用して
三次元造形物を製造する場合には、凸部の接着剤がロー
ル圧によって凹部側に移動するので全体としてほぼ均一
な接着力を発揮するようになる。また、かかる構造にす
ることで、熱接着する際に加熱ローラーの熱が基紙に達
して、基紙に含まれる水分が蒸発し、その逃げ場が無く
なり基紙を浮かせることから生ずる部分的に接着不良を
起こすトラブルを低減できるメリットもある。When a three-dimensional molded article is manufactured using a heat-sensitive adhesive paper having a heat-sensitive adhesive layer having a fine uneven surface on the surface, the adhesive at the convex portion is formed by the roll pressure. Since it moves to the concave side, almost uniform adhesive force is exhibited as a whole. In addition, by adopting such a structure, the heat of the heating roller reaches the base paper during thermal bonding, the moisture contained in the base paper evaporates, there is no escape area, and the base paper is partially bonded due to floating. There is also an advantage that troubles that cause defects can be reduced.
【0048】以上述べたような方法で基紙の裏面に感熱
接着剤の塗工層を設けるが、基紙の表面(感熱接着剤塗
工層と反対の面)に熱可塑性樹脂を少量塗工することも
適宜行うことができる。この熱可塑性樹脂の種類として
は、感熱接着剤層に用いたものと同様な樹脂、即ち、ア
クリル酸エステル共重合体、メタアクリル酸エステル共
重合体、ポリ酢酸ビニル、酢酸ビニル−アクリル共重合
体、エチレン−酢酸ビニル共重合体、エチレン−酢酸ビ
ニル−アクリル共重合体、塩化ビニル−エチレン共重合
体、アイオノマー樹脂、SBR、MBR、NBRなどを
用いることができ、通常塗工量は、0.5〜5g/m2
とする。この層を設けることにより、基紙の裏面に設け
た感熱接着剤層とのなじみがよくなり、強固な接着が得
られやすくなる。しかしこのような構造にすると三次元
の造形物を製造する際、熱ローラー表面に熱可塑性樹脂
が転移してローラーを汚染する問題を引き起こしやすく
なる。この問題を防止するには熱ローラー表面をポリテ
トラフルオロエチレン樹脂等の離型性に優れた樹脂で被
覆することが効果がある。A coating layer of a heat-sensitive adhesive is provided on the back surface of the base paper by the method described above, and a small amount of a thermoplastic resin is coated on the surface of the base paper (the surface opposite to the coating layer of the heat-sensitive adhesive). Can also be appropriately performed. As the type of the thermoplastic resin, the same resins as those used for the heat-sensitive adhesive layer, that is, acrylate copolymer, methacrylate copolymer, polyvinyl acetate, vinyl acetate-acryl copolymer , An ethylene-vinyl acetate copolymer, an ethylene-vinyl acetate-acrylic copolymer, a vinyl chloride-ethylene copolymer, an ionomer resin, SBR, MBR, NBR and the like can be used. 5-5 g / m 2
And By providing this layer, familiarity with the heat-sensitive adhesive layer provided on the back surface of the base paper is improved, and strong adhesion is easily obtained. However, such a structure tends to cause a problem that the thermoplastic resin is transferred to the surface of the heat roller and contaminates the roller when producing a three-dimensional molded article. To prevent this problem, it is effective to coat the surface of the heat roller with a resin having excellent releasability, such as polytetrafluoroethylene resin.
【0049】[0049]
【実施例】以下実施例および比較例を挙げて本発明を詳
細に説明するが、重量はいずれも乾燥重量を表す。EXAMPLES The present invention will be described in detail below with reference to Examples and Comparative Examples, and all weights are dry weights.
【0050】[基紙(A)の抄造](熱接着性バインダ
ー物質を含まないもの) NBKP25重量部およびLBKP75重量部からなる
原料パルプを400mlC.S.F.に叩解し、カオリ
ンを対パルプ5重量%、ロジンサイズ剤を対パルプ0.
6重量%、硫酸バンドを対パルプ2重量%、湿潤紙力増
強剤としてポリアミン・ポリアミド・エピクロルヒドリ
ン系樹脂(商品名「WS−500」、日本PMC(株)
製造)を対パルプ0.5重量%添加して紙料を調製し、
長網抄紙機を使用して常法に従い各種坪量の基紙を抄造
した。[Preparation of base paper (A)] (without heat-adhesive binder substance) A raw pulp consisting of 25 parts by weight of NBKP and 75 parts by weight of LBKP was mixed with 400 ml of pulp. S. F. And beaten kaolin with pulp at 5% by weight and rosin size with pulp at 0.
6% by weight, 2% by weight of sulphate band relative to pulp, polyamine / polyamide / epichlorohydrin resin (trade name "WS-500", Nippon PMC Co., Ltd.) as wet paper strength agent
Pulp is added to prepare pulp by adding
Using a fourdrinier paper machine, base papers of various basis weights were formed according to a conventional method.
【0051】[基紙(B)の抄造]NBKP25重量部
およびLBKP70重量部、ポリエチレン系合成パルプ
(商品名「SWP E400」、三井化学(株)製造)
5重量部からなる原料パルプを400mlC.S.F.
に叩解し、カオリンを対パルプ5重量%、ロジンサイズ
剤を対パルプ0.6重量%、硫酸バンドを対パルプ2重
量%、湿潤紙力増強剤としてポリアミン・ポリアミド・
エピクロルヒドリン系樹脂(商品名「WS−500」)
を対パルプ0.5重量%添加して紙料を調製し、長網抄
紙機を使用して常法に従い各種坪量の基紙を抄造した。[Preparation of base paper (B)] 25 parts by weight of NBKP and 70 parts by weight of LBKP, polyethylene synthetic pulp (trade name "SWP E400", manufactured by Mitsui Chemicals, Inc.)
A raw pulp consisting of 5 parts by weight was mixed with 400 ml C.I. S. F.
5% by weight of kaolin with respect to pulp, 0.6% by weight of rosin sizing agent with respect to pulp, 2% by weight of sulphate band with respect to pulp, and polyamine polyamide polyamide as wet paper strength enhancer
Epichlorohydrin resin (trade name "WS-500")
Was added to 0.5% by weight of pulp to prepare a stock, and a base paper having various basis weights was formed using a Fourdrinier machine according to a conventional method.
【0052】[基紙(C)の抄造]NBKP25重量部
およびLBKP65重量部、ポリエチレン系合成パルプ
(商品名「SWP E400」)10重量部からなる原
料パルプを400mlC.S.F.に叩解し、カオリン
を対パルプ5重量%、ロジンサイズ剤を対パルプ0.6
重量%、硫酸バンドを対パルプ2重量%、湿潤紙力増強
剤としてポリアミン・ポリアミド・エピクロルヒドリン
系樹脂(商品名「WS−500」)を対パルプ0.5重
量%添加して紙料を調製し、長網抄紙機を使用して常法
に従い各種坪量の基紙を抄造した。[Preparation of Base Paper (C)] A raw pulp comprising 25 parts by weight of NBKP, 65 parts by weight of LBKP, and 10 parts by weight of a polyethylene-based synthetic pulp (trade name "SWP E400") was mixed with 400 ml C.P. S. F. And beaten kaolin with pulp at 5% by weight and rosin size with pulp at 0.6
A paper stock was prepared by adding 2% by weight of a sulfuric acid band to 2% by weight of pulp, and 0.5% by weight of pulp to a polyamine / polyamide / epichlorohydrin resin (trade name “WS-500”) as a wet strength agent. Using a fourdrinier paper machine, base papers of various basis weights were formed according to a conventional method.
【0053】[基紙(D)の抄造]NBKP25重量部
およびLBKP55重量部、ポリエチレン系合成パルプ
(商品名「SWP E400」)20重量部からなる原
料パルプを400mlC.S.F.に叩解し、カオリン
を対パルプ5重量%、ロジンサイズ剤を対パルプ0.6
重量%、硫酸バンドを対パルプ2重量%、湿潤紙力増強
剤としてポリアミン・ポリアミド・エピクロルヒドリン
系樹脂(商品名「WS−500」)を対パルプ0.5重
量%添加して紙料を調製し、長網抄紙機を使用して常法
に従い各種坪量の基紙を抄造した。[Preparation of Base Paper (D)] A raw pulp composed of 25 parts by weight of NBKP, 55 parts by weight of LBKP, and 20 parts by weight of a polyethylene synthetic pulp (trade name “SWP E400”) was mixed with 400 ml C.P. S. F. And beaten kaolin with pulp at 5% by weight and rosin size with pulp at 0.6
A paper stock was prepared by adding 2% by weight of a sulfuric acid band to 2% by weight of pulp, and 0.5% by weight of pulp to a polyamine / polyamide / epichlorohydrin resin (trade name “WS-500”) as a wet strength agent. Using a fourdrinier paper machine, base papers of various basis weights were formed according to a conventional method.
【0054】[基紙(E)の抄造]NBKP25重量部
およびLBKP45重量部、ポリエチレン系合成パルプ
(商品名「SWP E400」)30重量部からなる原
料パルプを400mlC.S.F.に叩解し、カオリン
を対パルプ5重量%、ロジンサイズ剤を対パルプ0.6
重量%、硫酸バンドを対パルプ2重量%、湿潤紙力増強
剤としてポリアミン・ポリアミド・エピクロルヒドリン
系樹脂(商品名「WS−500」)を対パルプ0.5重
量%添加して紙料を調製し、長網抄紙機を使用して常法
に従い各種坪量の基紙を抄造した。[Preparation of base paper (E)] A raw pulp composed of 25 parts by weight of NBKP, 45 parts by weight of LBKP, and 30 parts by weight of a polyethylene-based synthetic pulp (trade name "SWP E400") was mixed with 400 ml of pulp. S. F. And beaten kaolin with pulp at 5% by weight and rosin size with pulp at 0.6
A paper stock was prepared by adding 2% by weight of a sulfuric acid band to 2% by weight of pulp, and 0.5% by weight of pulp to a polyamine / polyamide / epichlorohydrin resin (trade name “WS-500”) as a wet strength agent. Using a fourdrinier paper machine, base papers of various basis weights were formed according to a conventional method.
【0055】[基紙(F)の抄造]NBKP25重量部
およびLBKP70重量部、芯鞘構造を有する複合繊維
(商品名「ES−CHOP」、チッソ(株)製造、芯材
料:ポリプロピレン、鞘材料:ポリエチレン)5重量部
からなる原料パルプを400mlC.S.F.に叩解
し、カオリンを対パルプ5重量%、ロジンサイズ剤を対
パルプ0.6重量%、硫酸バンドを対パルプ2重量%、
湿潤紙力増強剤としてポリアミン・ポリアミド・エピク
ロルヒドリン系樹脂(商品名「WS−500」)を対パ
ルプ0.5重量%添加して紙料を調製し、長網抄紙機を
使用して常法に従い各種坪量の基紙を抄造した。[Preparation of base paper (F)] 25 parts by weight of NBKP and 70 parts by weight of LBKP, a composite fiber having a core-sheath structure (trade name "ES-CHOP", manufactured by Chisso Corporation), core material: polypropylene, sheath material: (Polyethylene) 5 parts by weight of a raw pulp of 400 ml C.I. S. F. And beaten kaolin to pulp at 5% by weight, rosin sizing agent to pulp at 0.6% by weight, sulfate band to pulp at 2% by weight,
Polyamine / polyamide / epichlorohydrin-based resin (trade name “WS-500”) is added as a wet paper strength enhancer to the pulp at 0.5% by weight to prepare a paper stock, and a fourdrinier paper machine is used according to a conventional method. Base papers of various basis weights were made.
【0056】[基紙(G)の抄造]NBKP25重量部
およびLBKP65重量部、芯鞘構造を有する複合繊維
(商品名「ES−CHOP」)10重量部からなる原料
パルプを400mlC.S.F.に叩解し、カオリンを
対パルプ5重量%、ロジンサイズ剤を対パルプ0.6重
量%、硫酸バンドを対パルプ2重量%、湿潤紙力増強剤
としてポリアミン・ポリアミド・エピクロルヒドリン系
樹脂(商品名「WS−500」)を対パルプ0.5重量
%添加して紙料を調製し、長網抄紙機を使用して常法に
従い各種坪量の基紙を抄造した。[Preparation of Base Paper (G)] A raw pulp composed of 25 parts by weight of NBKP, 65 parts by weight of LBKP, and 10 parts by weight of a composite fiber having a core-sheath structure (trade name “ES-CHOP”) was mixed with 400 ml C.P. S. F. 5% by weight of kaolin with respect to pulp, 0.6% by weight of rosin sizing agent with respect to pulp, 2% by weight of sulphate band with respect to pulp, and polyamine / polyamide / epichlorohydrin resin as wet paper strength enhancer (trade name " WS-500 ") was added to pulp at 0.5% by weight to prepare a stock, and a base paper having various basis weights was formed using a Fourdrinier machine in accordance with a conventional method.
【0057】[基紙(H)の抄造]NBKP25重量部
およびLBKP55重量部、芯鞘構造を有する複合繊維
(商品名「ES−CHOP」)20重量部からなる原料
パルプを400mlC.S.F.に叩解し、カオリンを
対パルプ5重量%、ロジンサイズ剤を対パルプ0.6重
量%、硫酸バンドを対パルプ2重量%、湿潤紙力増強剤
としてポリアミン・ポリアミド・エピクロルヒドリン系
樹脂(商品名「WS−500」)を対パルプ0.5重量
%添加して紙料を調製し、長網抄紙機を使用して常法に
従い各種坪量の基紙を抄造した。[Preparation of base paper (H)] A raw pulp composed of 25 parts by weight of NBKP and 55 parts by weight of LBKP, and 20 parts by weight of a composite fiber having a core-sheath structure (trade name "ES-CHOP") was mixed with 400 ml of pulp. S. F. 5% by weight of kaolin with respect to pulp, 0.6% by weight of rosin sizing agent with respect to pulp, 2% by weight of sulphate band with respect to pulp, and polyamine / polyamide / epichlorohydrin resin as wet paper strength enhancer (trade name " WS-500 ") was added to pulp at 0.5% by weight to prepare a stock, and a base paper having various basis weights was formed using a Fourdrinier machine in accordance with a conventional method.
【0058】[基紙(I)の抄造]NBKP25重量部
およびLBKP75重量部からなる原料パルプを400
mlC.S.F.に叩解し、カオリンを対パルプ5重量
%、ロジンサイズ剤を対パルプ0.6重量%、硫酸バン
ドを対パルプ2重量%、湿潤紙力増強剤としてポリアミ
ン・ポリアミド・エピクロルヒドリン系樹脂(商品名
「WS−500」)を対パルプ0.5重量%添加して紙
料を調製し、長網抄紙機を使用して常法に従い各種坪量
の原紙を抄造し、次いで、熱可塑性樹脂ディスパージョ
ン(商品名「TKR−73」、高松油脂(株)製造、変
性ポリ酢酸ビニルエマルジョン)を基紙に対して10重
量%含浸した。[Preparation of Base Paper (I)] A raw pulp consisting of 25 parts by weight of NBKP and 75 parts by weight of LBKP was
mlC. S. F. 5% by weight of kaolin with respect to pulp, 0.6% by weight of rosin sizing agent with respect to pulp, 2% by weight of sulphate band with respect to pulp, and polyamine / polyamide / epichlorohydrin resin as wet paper strength enhancer (trade name " WS-500 ") is added to the pulp at 0.5% by weight to prepare a paper stock, and base papers of various basis weights are formed using a fourdrinier paper machine according to a conventional method, and then a thermoplastic resin dispersion ( A base paper was impregnated with “TKR-73” (trade name, modified polyvinyl acetate emulsion manufactured by Takamatsu Yushi Co., Ltd.) at 10% by weight.
【0059】[感熱接着剤(A)の塗工]エチレン・酢
酸ビニル共重合エマルジョンとワックスエマルジョンを
種々の混合割合で混合して溶融温度の異なる感熱接着剤
(A1=溶融温度77℃、A2=溶融温度40℃、A3
=溶融温度180℃)を調製し、これをグラビアコータ
ーを用いて塗工した。[Application of Thermal Adhesive (A)] An ethylene / vinyl acetate copolymer emulsion and a wax emulsion are mixed at various mixing ratios and heat-sensitive adhesives having different melting temperatures (A1 = melting temperature 77 ° C., A2 = Melting temperature 40 ° C, A3
= Melting temperature 180 ° C.), and this was applied using a gravure coater.
【0060】[感熱接着剤(B)の塗工]不飽和ポリエ
ステル樹脂(溶融温度150℃)をグラビアコーターを
用いて塗工した。[Application of Heat-Sensitive Adhesive (B)] An unsaturated polyester resin (melting temperature: 150 ° C.) was applied using a gravure coater.
【0061】[感熱接着剤(C)の塗工]不飽和ポリエ
ステル樹脂(溶融温度50℃)をグラビアコーターを用
いて塗工した。[Application of Heat-Sensitive Adhesive (C)] An unsaturated polyester resin (melting temperature: 50 ° C.) was applied using a gravure coater.
【0062】[実施例1〜11]表1に各実施例で使用
した基紙及び感熱接着紙の構成、すなわち、基紙の種類
と坪量、感熱接着剤の種類、溶融温度、塗工量、塗工面
の凹凸の有無をまとめて示す。なお、感熱接着剤塗工面
の凹凸は塗工直後の塗工面をワイヤバーで擦ることで形
成した(凸部と凸部の間隔は0.7mm)。[Examples 1 to 11] Table 1 shows the structures of the base paper and the heat-sensitive adhesive paper used in each example, that is, the type and basis weight of the base paper, the type of the heat-sensitive adhesive, the melting temperature, and the coating amount. , The presence or absence of irregularities on the coated surface are shown together. The unevenness of the heat-sensitive adhesive-coated surface was formed by rubbing the coated surface immediately after the coating with a wire bar (the interval between the convex portions was 0.7 mm).
【0063】[比較例1〜3]表1に各比較例で使用し
た基紙及び感熱接着紙の構成、すなわち、基紙の種類と
坪量、感熱接着剤の溶融温度、塗工量、塗工面の凹凸の
有無をまとめて示す。[Comparative Examples 1 to 3] Table 1 shows the constitution of the base paper and the heat-sensitive adhesive paper used in each comparative example, namely, the type and basis weight of the base paper, the melting temperature of the heat-sensitive adhesive, the coating amount, and the coating amount. The presence or absence of irregularities on the surface is shown below.
【0064】[0064]
【表1】 [Table 1]
【0065】表1に示した感熱接着紙を使用して下記項
目についての評価を行った。結果を表2にまとめて示
す。 [耐ブロッキング性の評価]5×5cmの大きさの感熱
接着紙サンプルを、接着剤塗工面と非塗工面が順次重な
るように10枚重ねて、30℃の恒温槽中で、500g
/cm2 の加重をかけて放置し、冷却後サンプルを剥離
してブロッキングの状態を評価した。評価は5点法で行
い、全くブロッキングが起きない状態を5点、ブロッキ
ングが著しく起きている状態を1点として評価した。3
点以上(剥離する際に紙を破壊するようなブロッキング
が起きていない状態)が実用上必要である。なお、表2
中の比較例2の感熱接着紙はブロッキングが著しく起き
ており、実用に供せないものであったため、造形物を製
造しなかった。Using the heat-sensitive adhesive paper shown in Table 1, the following items were evaluated. The results are summarized in Table 2. [Evaluation of anti-blocking property] Ten heat-sensitive adhesive paper samples having a size of 5 × 5 cm were stacked so that the adhesive-coated surface and the non-coated surface were sequentially overlapped, and 500 g in a thermostat at 30 ° C.
/ Cm 2 , and the sample was peeled off after cooling, and the state of blocking was evaluated. The evaluation was performed according to a 5-point method. The state where no blocking occurred was evaluated as 5 points, and the state where blocking was remarkably occurred was evaluated as 1 point. Three
It is practically necessary that the number of points is equal to or more than that (the state in which blocking that would break the paper upon peeling has not occurred). Table 2
In the heat-sensitive adhesive paper of Comparative Example 2 in the middle, blocking occurred remarkably, and it was not practically usable.
【0066】[接着紙としての性能評価]図1に示した
ような三次元造型機(商品名「LOM1015E」、豊
田工機(株)販売)を使用して、加熱ローラーの温度、
接着速度を表2に示す値に設定して、縦、横、高さがい
ずれも100mmの立方体造形物を製造し、次の評価を
行った。[Evaluation of Performance as Adhesive Paper] Using a three-dimensional molding machine (trade name “LOM1015E”, sold by Toyota Koki Co., Ltd.) as shown in FIG.
The bonding speed was set to the values shown in Table 2, and a cubic object having a length, width, and height of 100 mm was manufactured, and the following evaluation was performed.
【0067】[接着性]造形物の接着された紙層を手で
剥がして5点法で評価した。5点は理想的な接着性を示
すことを、1点は全く接着していないことを示し、実用
的には3点以上が必要である。[Adhesiveness] The paper layer to which the molded article was adhered was peeled off by hand and evaluated by a five-point method. Five points indicate ideal adhesion, one point indicates no adhesion, and practically three or more points are required.
【0068】[ホットタック値及び造形物の変形]図2
に示したヒートシールテスター(商品名「ヒートシール
テスターTP701A」、テスター産業(株)製)を用
いて感熱接着紙のホットタック値を測定した。測定条件
は、ガイドロールの直径が20mm、上部シールバーの
圧着荷重が1kg/cm2 、圧着時間が1秒、試料の先
端に掛かる加重Wがそれぞれ30g、角度θが20度、
シール温度が〔接着剤の溶融温度+30〕℃のときのホ
ットタック値である。また表2には、上記の条件で熱接
着したときの造形物の変形の有無を示した。[Hot tack value and deformation of molded object] FIG. 2
The hot tack value of the heat-sensitive adhesive paper was measured using a heat seal tester (trade name “Heat Seal Tester TP701A”, manufactured by Tester Sangyo Co., Ltd.). The measurement conditions were as follows: the diameter of the guide roll was 20 mm, the pressure load on the upper seal bar was 1 kg / cm 2 , the pressure time was 1 second, the weight W applied to the tip of the sample was 30 g, the angle θ was 20 degrees,
This is the hot tack value when the sealing temperature is [adhesive melting temperature + 30] ° C. Table 2 also shows the presence or absence of deformation of the molded article when heat-bonded under the above conditions.
【0069】[造形物の伸縮]得られた立方体造形物
(縦、横、高さがいずれも100mm)を通常の室内環
境(20℃、40〜60%RH)に24時間放置し、こ
のときの造形物の高さをHmmとした。((H−10
0)/100)×100の値を、造形物の高さ変化率
(%)として示した。この値が0.3%以下であること
が鋳型の寸法精度として要求される。[Stretching and Stretching of the Shaped Object] The obtained cubic shaped object (length, width and height are all 100 mm) is allowed to stand in a normal indoor environment (20 ° C., 40 to 60% RH) for 24 hours. The height of the molded article was Hmm. ((H-10
The value of 0) / 100) × 100 was shown as the height change rate (%) of the modeled object. This value is required to be 0.3% or less as the dimensional accuracy of the mold.
【0070】[総合評価]以上を総合して5点法で評価
した。5点は全く問題のないことを、1点は著しい欠点
があることを示し、実用的には3点以上が必要である。[Comprehensive Evaluation] The above items were comprehensively evaluated by a five-point method. Five points indicate no problem at all, one point indicates a remarkable defect, and practically three or more points are required.
【0071】[0071]
【表2】 [Table 2]
【0072】表1及び表2の結果から、以下のことがわ
かる。 1)各実施例と比較例1の対比から、基紙に熱接着性バ
インダー物質を含むと、造形物の高さ変化率が0.3%
以下となり、空気中の水分変化があっても造形物の寸法
精度に優れることがわかる。 2)実施例1〜4間の対比、及び実施例5〜7間の対比
から、熱接着性バインダー物質の基紙中の含有比率を高
くするほど、造形物の寸法精度が高まることがわかる。 3)実施例1〜4と実施例5〜7と実施例8との対比か
ら、熱接着性バインダー物質としてポリエチレン系の合
成パルプを紙料に添加して抄造した基紙を使用すること
が、造形物の寸法精度向上に最も好適であることがわか
る。 4)比較例3においては、感熱接着紙の接着性能が悪い
ため、造形物の端面部分に感熱接着紙間で隙間が生じ、
この隙間からの水分の吸収が大きくなる結果、造形物の
高さ変化率が大きくなることがわかる。From the results in Tables 1 and 2, the following can be understood. 1) From the comparison between each example and comparative example 1, when the base paper contains the heat-adhesive binder substance, the height change rate of the molded article is 0.3%.
The results are as follows, and it can be seen that the dimensional accuracy of the molded article is excellent even when there is a change in moisture in the air. 2) The comparison between Examples 1 to 4 and the comparison between Examples 5 to 7 show that the higher the content ratio of the heat-adhesive binder substance in the base paper, the higher the dimensional accuracy of the molded article. 3) From comparison of Examples 1-4, Examples 5-7, and Example 8, it was found that a base paper made by adding a polyethylene-based synthetic pulp to a stock as a heat-adhesive binder material was used. It can be seen that this is most suitable for improving the dimensional accuracy of the modeled object. 4) In Comparative Example 3, since the adhesive performance of the heat-sensitive adhesive paper was poor, a gap was formed between the heat-sensitive adhesive papers at the end face portion of the molded article,
It can be seen that as a result of increased absorption of moisture from the gap, the rate of change in height of the modeled object increases.
【0073】[0073]
【発明の効果】上述したところからわかるように本発明
の三次元造型機用感熱接着紙によれば、三次元造型機に
好適に用いることができる感熱接着性を具備し、しか
も、造形物が空気中の水分を吸放出することによって伸
縮するのを効果的に抑制でき、造形物に特別な被覆を施
さずとも高い寸法精度をもたらすことができる。As can be seen from the above description, according to the heat-sensitive adhesive paper for a three-dimensional molding machine of the present invention, the heat-sensitive adhesive has a heat-sensitive adhesive property that can be suitably used for a three-dimensional molding machine, and furthermore, the molded article has By absorbing and releasing moisture in the air, expansion and contraction can be effectively suppressed, and high dimensional accuracy can be provided without applying a special coating to the modeled object.
【図面の簡単な説明】[Brief description of the drawings]
【図1】 感熱接着紙を用いて三次元造形物を製造する
ための三次元造型機の一例を示す説明図である。FIG. 1 is an explanatory diagram showing an example of a three-dimensional molding machine for producing a three-dimensional molded object using a heat-sensitive adhesive paper.
【図2】 ホットタック値を測定するための装置の概念
を示す説明図である。FIG. 2 is an explanatory diagram showing the concept of an apparatus for measuring a hot tack value.
31 感熱接着紙 32 上下に移動可能な台 33 供給ロール 34 ガイドロール 35 加熱ローラー 36 可動光ヘッド 37 ミラー 38 レーザー光源 39 ガイドロール 40 巻き取りロール 41 所定形状の輪郭部 42 切断線 43 格子状の切断線 44 積層体 31 Thermally Sensitive Adhesive Paper 32 Vertically Movable Table 33 Supply Roll 34 Guide Roll 35 Heating Roller 36 Movable Optical Head 37 Mirror 38 Laser Light Source 39 Guide Roll 40 Winding Roll 41 Predetermined Profile 42 Cutting Line 43 Grid Cutting Wire 44 laminate
───────────────────────────────────────────────────── フロントページの続き Fターム(参考) 4F213 WA25 WB01 WL02 WL15 WL22 WL27 WL92 WL96 4J004 AA07 AA09 AB03 AC00 CA02 CB01 CC02 CE00 DB01 FA10 GA01 4L055 AF09 AH17 AH37 EA08 EA40 GA42 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4F213 WA25 WB01 WL02 WL15 WL22 WL27 WL92 WL96 4J004 AA07 AA09 AB03 AC00 CA02 CB01 CC02 CE00 DB01 FA10 GA01 4L055 AF09 AH17 AH37 EA08 EA40 GA42
Claims (20)
を、上下動可能な台の上面に順次供給し、この供給され
た感熱接着紙の表面を押圧しながら加熱して上記台また
は既に供給された感熱接着紙の表面に接着するととも
に、これらの感熱接着紙に所定形状の切断線を設けて複
数の層から成る積層体を形成し、この積層体から不要部
分を除去することにより三次元造形物を得る三次元造形
機に使用する感熱接着紙において、溶融温度が50〜1
50℃の感熱接着剤層を坪量40〜200g/m2 の基
紙の裏面に5〜30g/m2 設けたこと、および前記基
紙はセルロース繊維を主体としこれに熱接着性バインダ
ー物質5〜60重量%を含有させたものであることを特
徴とする三次元造形機用の感熱接着紙。1. A heat-sensitive adhesive paper having a heat-sensitive adhesive layer provided on a back surface is sequentially supplied to an upper surface of a vertically movable table, and the surface of the supplied heat-sensitive adhesive paper is heated while being pressed, so that the table or the table is heated. By adhering to the surface of the heat-sensitive adhesive paper that has already been supplied, a cutting line of a predetermined shape is provided on these heat-sensitive adhesive papers to form a laminate including a plurality of layers, and unnecessary portions are removed from the laminate. In a heat-sensitive adhesive paper used for a three-dimensional printing machine for obtaining a three-dimensional printing object, the melting temperature is 50 to 1
A heat-sensitive adhesive layer at 50 ° C. is provided on the back surface of a base paper having a basis weight of 40 to 200 g / m 2 at 5 to 30 g / m 2 , and the base paper is mainly composed of cellulose fiber and has a heat-adhesive binder substance 5 A heat-sensitive adhesive paper for a three-dimensional printing machine, characterized in that it contains about 60% by weight.
mm以下であることを特徴とする請求項1記載の三次元
造形機用の感熱接着紙。2. The hot tack value of the heat-sensitive adhesive is 30.
2. The heat-sensitive adhesive paper for a three-dimensional printing machine according to claim 1, wherein the thickness is not more than mm.
であることを特徴とする請求項1または2記載の三次元
造形機用の感熱接着紙。3. The base paper having a basis weight of 60 to 120 g / m 2.
The heat-sensitive adhesive paper for a three-dimensional printing machine according to claim 1, wherein:
ル共重合体系の樹脂であることを特徴とする請求項1〜
3のいずれか1項記載の三次元造形機用の感熱接着紙。4. The method according to claim 1, wherein the heat-sensitive adhesive is an ethylene-vinyl acetate copolymer resin.
The heat-sensitive adhesive paper for a three-dimensional printing machine according to any one of claims 3 to 7.
共重合体系の樹脂とワックスとの混合物であり、その溶
融温度が60〜90℃であることを特徴とする請求項1
〜4のいずれか1項記載の三次元造形機用の感熱接着
紙。5. The heat-sensitive adhesive according to claim 1, wherein the heat-sensitive adhesive is a mixture of an ethylene-vinyl acetate copolymer resin and a wax, and has a melting temperature of 60 to 90 ° C.
The heat-sensitive adhesive paper for a three-dimensional printing machine according to any one of claims 1 to 4.
〜25g/m2 設けたことを特徴とする請求項1〜5の
いずれか1項記載の三次元造形機用の感熱接着紙。6. The heat-sensitive adhesive layer is coated on the back surface of
Heat-sensitive adhesive sheet for three-dimensional modeling machine according to any one of claims 1-5, characterized in that provided 25 g / m 2.
状が形成されていることを特徴とする請求項1〜6のい
ずれか1項記載の三次元造型機用の感熱接着紙。7. The heat-sensitive adhesive paper for a three-dimensional molding machine according to claim 1, wherein fine irregularities are formed on the surface of the heat-sensitive adhesive layer.
を添加することで形成されていることを特徴とする請求
項7記載の三次元造型機用の感熱接着紙。8. The heat-sensitive adhesive paper for a three-dimensional molding machine according to claim 7, wherein the fine uneven shape is formed by adding powder to the heat-sensitive adhesive.
工量を部分的に変化させることで形成されていることを
特徴とする請求項7または8に記載の三次元造型機用の
感熱接着紙。9. The three-dimensional molding machine according to claim 7, wherein the fine irregularities are formed by partially changing a coating amount of the heat-sensitive adhesive layer. Thermal adhesive paper.
紙されていることを特徴とする請求項1〜9のいずれか
1項記載の三次元造形機用の感熱接着紙。10. The heat-sensitive adhesive paper for a three-dimensional printing machine according to claim 1, wherein the base paper is made using a wet paper strength enhancer.
とする請求項1〜10のいずれか1項記載の三次元造形
機用の感熱接着紙。11. The heat-sensitive adhesive paper for a three-dimensional printing machine according to claim 1, wherein a moisture-proof layer is provided on the base paper.
0.5〜5g/m2 設けたことを特徴とする請求項1〜
11のいずれか1項記載の三次元造形機用の感熱接着
紙。12. The method according to claim 1, wherein a thermoplastic resin layer is provided on the surface of the base paper in an amount of 0.5 to 5 g / m 2 .
The heat-sensitive adhesive paper for a three-dimensional printing machine according to any one of claims 11 to 11.
度が50〜180℃であることを特徴とする請求項1〜
12のいずれか1項記載の三次元造形機用の感熱接着
紙。13. The method according to claim 1, wherein the melting temperature of the thermoadhesive binder material is 50 to 180 ° C.
The heat-sensitive adhesive paper for a three-dimensional printer according to any one of claims 12 to 12.
着性繊維であることを特徴とする請求項1〜13のいず
れか1項記載の三次元造形機用の感熱接着紙。14. The heat-sensitive adhesive paper for a three-dimensional printing machine according to claim 1, wherein the heat-adhesive binder substance is a heat-adhesive fiber.
の合成パルプであることを特徴とする請求項14項記載
の三次元造形機用の感熱接着紙。15. The heat-sensitive adhesive paper for a three-dimensional printing machine according to claim 14, wherein the heat-bondable fiber is a polyolefin-based synthetic pulp.
度又は軟化温度が高い樹脂で芯部分を形成し、相対的に
溶融温度又は軟化温度が低い樹脂で鞘部分を形成した芯
鞘構造を有する複合繊維であることを特徴とする請求項
14記載の三次元造形機用の感熱接着紙。16. The core-sheath structure in which the heat-adhesive fiber has a core portion formed of a resin having a relatively high melting temperature or softening temperature, and a sheath portion formed of a resin having a relatively low melting temperature or softening temperature. The heat-sensitive adhesive paper for a three-dimensional printing machine according to claim 14, which is a composite fiber having the following.
化温度が互いに異なる熱可塑性樹脂を繊維の軸方向に沿
って並行に配列し一体化したサイドバイサイド構造を有
する複合繊維であることを特徴とする請求項14記載の
三次元造形機用の感熱接着紙。17. The heat-adhesive fiber is a conjugate fiber having a side-by-side structure in which thermoplastic resins having different melting temperatures or softening temperatures are arranged in parallel along a fiber axial direction and integrated. The heat-sensitive adhesive paper for a three-dimensional printing machine according to claim 14.
着性粒子であることを特徴とする請求項1〜13のいず
れか1項記載の三次元造型機用の感熱接着紙。18. The heat-sensitive adhesive paper for a three-dimensional molding machine according to claim 1, wherein the heat-adhesive binder material is a heat-adhesive particle.
後に熱接着性バインダー物質を含浸させたものであるこ
とを特徴とする請求項1〜13のいずれか1項記載の三
次元造型機用の感熱接着紙。19. The three-dimensional printing method according to claim 1, wherein the base paper is impregnated with a heat-adhesive binder substance during or after the base paper is formed. Adhesive paper for machine.
の前記感熱接着紙を、上下動可能な台の上面に順次供給
し、この供給された感熱接着紙の表面を押圧しながら加
熱して上記台または既に供給された感熱接着紙の表面に
接着するとともに、これらの感熱接着紙に所定形状の切
断線を設けて複数の層から成る積層体を形成し、この積
層体から不要部分を除去することにより製造された三次
元造形物。20. The heat-sensitive adhesive paper according to claim 1, which is sequentially supplied to an upper surface of a vertically movable table, and heated while pressing the surface of the supplied heat-sensitive adhesive paper. Then, the heat-sensitive adhesive paper is bonded to the table or the surface of the heat-sensitive adhesive paper that has already been supplied, and a cut line having a predetermined shape is formed on the heat-sensitive adhesive paper to form a laminate including a plurality of layers. Three-dimensional object manufactured by removing the
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JP2000064639A JP2001254060A (en) | 2000-03-09 | 2000-03-09 | Thermosensible adhesive paper three-dimensional shaping machine and three dimensional shaped item |
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Cited By (7)
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JP2010116631A (en) * | 2008-11-11 | 2010-05-27 | Okamoto Ind Inc | Wallpaper |
CN104552957A (en) * | 2015-01-27 | 2015-04-29 | 潘祥生 | 3D printer for printing carbon fibers |
KR101547854B1 (en) | 2015-03-18 | 2015-08-27 | 주식회사 비엔에스 | device and method for forming a three-dimensional layered product on the fabric |
KR101654635B1 (en) * | 2015-06-01 | 2016-09-22 | 주식회사 비엔에스 | device and method for forming a three-dimensional layered product on the fabric |
JP2016182727A (en) * | 2015-03-26 | 2016-10-20 | セイコーエプソン株式会社 | Molding apparatus and molding method for molded object |
CN109278293A (en) * | 2018-11-21 | 2019-01-29 | 湘潭大学 | A kind of gasified pattern preparation facilities and implementation method for carbon fiber regular array |
CN114162656A (en) * | 2021-01-28 | 2022-03-11 | 河南奥德利数码科技有限公司 | Movable cooling paper receiving device with high fitting degree with main shaft |
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Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010116631A (en) * | 2008-11-11 | 2010-05-27 | Okamoto Ind Inc | Wallpaper |
CN104552957A (en) * | 2015-01-27 | 2015-04-29 | 潘祥生 | 3D printer for printing carbon fibers |
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CN109278293A (en) * | 2018-11-21 | 2019-01-29 | 湘潭大学 | A kind of gasified pattern preparation facilities and implementation method for carbon fiber regular array |
CN109278293B (en) * | 2018-11-21 | 2020-06-19 | 湘潭大学 | Gasification mold preparation device for regular arrangement of carbon fibers and implementation method |
CN114162656A (en) * | 2021-01-28 | 2022-03-11 | 河南奥德利数码科技有限公司 | Movable cooling paper receiving device with high fitting degree with main shaft |
CN114162656B (en) * | 2021-01-28 | 2023-12-08 | 河南印都数码科技有限公司 | Movable cooling paper receiving device with high degree of adhesion with main shaft |
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