TW201338990A - Engineering paper - Google Patents
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本發明涉及工程紙。 The present invention relates to engineering paper.
聚氨酯片或合成皮革等通過下述方法製造：在表面具有剝離性的工程紙上塗佈成為上述產品的原料的合成樹脂組合物，在所述合成樹脂組合物固化後剝離工程紙。 A polyurethane sheet, synthetic leather, or the like is produced by coating a synthetic resin composition which is a raw material of the above product on engineering paper having releasability on the surface, and peeling off the engineering paper after the synthetic resin composition is cured.
以往，為了使工程紙與原料樹脂組合物的固化體容易剝離，使用牛皮紙等表面層疊有合成樹脂的製品或塗佈有離型劑的製品作為在所述製造工序中使用的工程紙。 Conventionally, in order to facilitate the peeling of the cured product of the engineering paper and the raw material resin composition, a product in which a synthetic resin is laminated on the surface such as kraft paper or a product coated with a release agent is used as the engineering paper used in the above-described production process.
在使用了這種工程紙的聚氨酯片等的製造工序中，當工程紙的層疊層或塗層中存在氣泡、凹凸、不均等表面缺陷時，缺陷的形狀會轉印到塗佈的原料樹脂組合物的固化體表面，從而招致形狀不良。此外，塗佈在工程紙表面的原料樹脂組合物的塗層中如果存在含有氣泡、塗佈不均等塗佈缺陷，也同樣會引起形狀不良。可是，所述的缺陷難以在塗佈階段發現，大多經過層疊等各種工序後到了從組合物的固化體剝離工程紙的階段才能發現缺陷，不僅降低了成品率而且加大了原材料和勞力的損失。 In the manufacturing process of a polyurethane sheet or the like using such engineering paper, when there are surface defects such as bubbles, irregularities, and unevenness in the laminated layer or the coating layer of the engineering paper, the shape of the defect is transferred to the coated raw material resin combination. The solidified body surface of the object causes a poor shape. Further, if a coating defect containing a bubble or a coating unevenness is present in the coating layer of the raw material resin composition coated on the surface of the engineering paper, the shape defect is similarly caused. However, the defects described above are difficult to find in the coating stage, and most of the defects are found in the stage of peeling off the engineering paper from the cured body of the composition after various processes such as lamination, which not only reduces the yield but also increases the loss of raw materials and labor. .
另一方面，為了發現塗佈在工程紙上的樹脂組合物中混入的異物等，公開有將剝離層等著色的工程紙(參照日本專利公開公報特開2010-84264號等)，這種工程紙沒有考慮發現工程紙自身的缺陷和塗佈不良，在塗佈透明和乳白色等具有高明度顏色的樹脂組合物時，難以發現所述的缺陷。 On the other hand, in order to find a foreign material or the like which is mixed in the resin composition coated on the engineering paper, a construction paper which is colored by a release layer or the like is disclosed (refer to Japanese Laid-Open Patent Publication No. 2010-84264, etc.). The defects of the engineering paper itself and the coating failure were not considered, and it was difficult to find the defects when coating a resin composition having a high-definition color such as transparent or milky white.
專利文獻1：日本專利公開公報特開2010-84264號 Patent Document 1: Japanese Patent Laid-Open Publication No. 2010-84264
鑒於所述的問題，本發明的目的在於提供一種工程紙，在塗佈聚氨酯片或合成皮革等的原料樹脂組合物時，容易發現工程紙表面和樹脂組合物塗佈的缺陷。 In view of the above problems, an object of the present invention is to provide an engineering paper which is easy to find defects in coating of a surface of an engineering paper and a resin composition when a raw resin composition such as a polyurethane sheet or a synthetic leather is applied.
為瞭解決所述的問題，本發明提供一種工程紙，其包括：基材片；以及剝離層，層疊於所述基材片的表面側，所述工程紙具有著色面，從表面側能視覺辨認到所述著色面，並且所述著色面的明度為5以下。 In order to solve the problems, the present invention provides an engineering paper comprising: a substrate sheet; and a release layer laminated on a surface side of the substrate sheet, the engineering paper having a colored surface, which is visually visible from the surface side The colored surface is recognized, and the brightness of the colored surface is 5 or less.
由於所述工程紙具有從表面側能視覺辨認到的、著色有明度5以下的顏色的著色面，所以當在所述工程紙的剝離層上塗佈聚氨酯片或合成皮革等的原料樹脂組合物時，透過樹脂組合物的塗佈膜能視覺辨認到著色面所具有的顏色。因此，如果所述工程紙的表面存在缺陷或樹脂組合物的塗佈存在不良，則由於存在缺陷和不良的部位產生的塗佈不均及樹脂組合物塗佈膜的厚度的變化，著色面的視覺辨認到的顏色的深淺會產生差異。因此，按照所述工程紙，通過在塗佈樹脂組合物時確認視覺辨認到的顏色的深淺的差異，可以通過目視容易地發現工程紙表面和樹脂組合物的塗佈有無缺陷。 Since the engineering paper has a colored surface which is visually recognizable from the surface side and colored with a color of 5 or less, a raw resin composition such as a polyurethane sheet or synthetic leather is applied to the release layer of the engineering paper. At the time, the color of the colored surface can be visually recognized by the coating film of the resin composition. Therefore, if there is a defect in the surface of the engineering paper or the coating of the resin composition is poor, the coating unevenness due to the defect and the defective portion and the thickness of the coating film of the resin composition, the colored surface The depth of the visually recognized color will make a difference. Therefore, according to the engineering paper, by confirming the difference in the depth of the visually recognized color when the resin composition is applied, it is possible to easily visually recognize the presence or absence of the coating of the surface of the engineering paper and the resin composition.
優選的是，所述著色面的彩度為1以下。通過使著色面的彩度設定在所述範圍，在所述工程紙的表面塗佈樹脂組合物時能容易地視覺辨認出著色面的顏色的深淺。特別是，由於工程紙上塗佈的樹脂組合物大多為透明或乳白色的，所以通過使著色面的明度在5以下、同時使彩度接近0(成為黑色)，樹脂組合物的塗佈不均的識別性得到提高，能夠進一步提高樹脂組合物塗佈時工程紙表面和樹脂組合物塗佈的缺陷的視覺辨認的容易性。 Preferably, the colored surface has a chroma of 1 or less. By setting the saturation of the colored surface to the above range, the color of the colored surface can be easily visually recognized when the resin composition is applied to the surface of the engineering paper. In particular, since the resin composition applied on the engineering paper is mostly transparent or milky white, the resin composition is unevenly coated by setting the brightness of the colored surface to 5 or less and making the chroma close to 0 (becomes black). The visibility is improved, and the ease of visual recognition of defects in the surface of the engineering paper and the coating of the resin composition at the time of coating the resin composition can be further improved.
優選的是，所述基材片包括基材層和著色層，所述著色層配置於所述基材層的表面側，通過所述著色層的表面構成所述著色面。這樣，在基材片的表面側設置著色層時，由於能通過例如塗 佈和印刷等方法形成著色層，所以能以低成本在所述工程紙上形成著色面。 Preferably, the base material sheet includes a base material layer and a colored layer, and the colored layer is disposed on a surface side of the base material layer, and the colored surface is formed by a surface of the colored layer. Thus, when a colored layer is provided on the surface side of the substrate sheet, it can be coated by, for example, The coloring layer is formed by a method such as cloth and printing, so that a colored surface can be formed on the engineering paper at low cost.
優選的是，所述著色層含有炭黑。通過使著色層中含有炭黑，不僅能夠使所述工程紙的著色面成為樹脂組合物的塗佈不均容易視覺辨認到的黑色，而且使所述工程紙具有導電效果。其結果，可以防止因樹脂組合物塗佈時的靜電引起所述工程紙產生起火、發煙、針孔等缺陷。 Preferably, the colored layer contains carbon black. By including carbon black in the colored layer, not only the colored surface of the engineering paper can be made into black which is easily visually recognized by the uneven application of the resin composition, but also the conductive paper has an electrically conductive effect. As a result, it is possible to prevent the engineering paper from causing defects such as fire, smoke, and pinholes due to static electricity during application of the resin composition.
優選的是，使用紙作為所述基材層。通過使用紙作為基材層，能提高所述工程紙的耐久性及耐熱性。 Preferably, paper is used as the substrate layer. By using paper as a base material layer, durability and heat resistance of the engineering paper can be improved.
優選的是，所述基材層的明度為8以上，所述基材層的彩度為1以下。通過使基材層的顏色成為所述範圍的明度和彩度，能夠使配置在基材層的表面側的著色層的顯色更清晰，能提高樹脂組合物塗佈時工程紙表面和樹脂組合物塗佈的缺陷的視覺辨認的容易性。此外，能容易判斷所述工程紙的正反。 Preferably, the base material layer has a lightness of 8 or more, and the base material layer has a saturation of 1 or less. By setting the color of the base material layer to the brightness and chroma of the above range, the color development of the colored layer disposed on the surface side of the base material layer can be made clearer, and the surface of the engineering paper and the resin combination at the time of coating the resin composition can be improved. The ease of visual recognition of defects coated by the object. In addition, the positive and negative of the engineering paper can be easily judged.
所述工程紙的基材片可以如上所述地具有著色層，通過著色層的表面構成著色面，但是優選的是，所述剝離層含有顏料，通過所述剝離層的表面構成所述著色面。這樣，通過由剝離層的表面構成著色面，可以在所述工程紙上形成著色面而無需在所述工程紙的製造階段中添加塗佈塗料的工序等。而且，由於向所述工程紙塗佈樹脂組合物時，樹脂組合物塗佈膜與著色面的距離變小，因此能夠提高樹脂組合物塗佈時工程紙表面和樹脂組合物塗佈的缺陷的視覺辨認的容易性。 The base material sheet of the engineering paper may have a colored layer as described above, and the colored surface is formed by the surface of the colored layer, but preferably, the release layer contains a pigment, and the colored surface is formed by the surface of the release layer. . In this way, by forming the colored surface from the surface of the release layer, a colored surface can be formed on the engineering paper without adding a step of applying a coating material to the production stage of the engineering paper. Further, when the resin composition is applied to the engineering paper, the distance between the coating film of the resin composition and the colored surface is reduced, so that the surface of the engineering paper and the coating of the resin composition at the time of coating the resin composition can be improved. The ease of visual recognition.
此外，在所述工程紙中，代替如上所述的基材片具有基材層且基材層的表面側具有著色層，優選的是，所述基材片具有透明的基材層和著色層，所述著色層配置於所述基材層的背面側，通過所述著色層的表面構成所述著色面。當在基材層的表面側設置有著色層時，由於製造所述工程紙時在著色面上層疊剝離層等而存在汙損著色面的可能性，但是通過使用透明的基材層並在其背 面側設置著色層，能夠降低在所述工程紙的製造工序中著色面污染的可能性。其結果，能提高樹脂組合物塗佈時工程紙表面和樹脂組合物塗佈的缺陷的視覺辨認的容易性。 Further, in the engineering paper, in place of the substrate sheet as described above having a substrate layer and the surface side of the substrate layer having a colored layer, it is preferable that the substrate sheet has a transparent substrate layer and a colored layer. The colored layer is disposed on the back side of the base material layer, and the colored surface is formed by the surface of the colored layer. When a colored layer is provided on the surface side of the base material layer, there is a possibility that the colored surface is stained by laminating a release layer or the like on the colored surface when the engineering paper is produced, but by using a transparent base material layer and Back The coloring layer is provided on the surface side, and the possibility of contamination of the colored surface in the manufacturing process of the engineering paper can be reduced. As a result, the ease of visual recognition of the defects of the surface of the engineering paper and the coating of the resin composition at the time of application of the resin composition can be improved.
優選的是，所述基材片與所述剝離層之間的剝離強度為0.02N/5cm以上5N/5cm以下。通過將基材片與剝離層之間的剝離強度設置在所述範圍，在聚氨酯片等成形時，基材片與剝離層不會意外剝離，並且聚氨酯片等成形後能夠容易地將基材片從剝離層剝離，結果使基材片可以再利用。 Preferably, the peeling strength between the base material sheet and the release layer is 0.02 N/5 cm or more and 5 N/5 cm or less. By setting the peeling strength between the base material sheet and the peeling layer in the above range, the base sheet and the peeling layer are not accidentally peeled off during the molding of the urethane sheet or the like, and the base sheet can be easily peeled off after the embossing of the urethane sheet or the like. Peeling from the release layer results in the substrate sheet being reused.
在此，“表面側”是指在所述工程紙上塗佈聚氨酯片或合成皮革等的原料樹脂組合物的面側。“紙”是指通過對紙漿纖維抄紙得到的產品。“明度(lightness)”和“彩度(chroma)”是基於JIS Z 8721測量到的值。“剝離強度”是以300mm/min的拉伸速度將基材片和剝離層剝離時的應力。 Here, the "surface side" means a surface side on which a raw material resin composition such as a polyurethane sheet or synthetic leather is coated on the engineering paper. "Paper" refers to a product obtained by papermaking a pulp fiber. "Lightness" and "chroma" are values measured based on JIS Z 8721. The "peel strength" is a stress at the time of peeling the base material sheet and the peeling layer at a tensile speed of 300 mm/min.
如上所述，本發明的工程紙，在塗佈聚氨酯片或合成皮革等的原料樹脂組合物時，能容易地發現工程紙表面和樹脂組合物塗佈的缺陷。 As described above, in the engineering paper of the present invention, when a raw material resin composition such as a polyurethane sheet or a synthetic leather is applied, defects in the surface of the engineering paper and the coating of the resin composition can be easily found.
1‧‧‧工程紙 1‧‧‧Engineering paper
2‧‧‧基材片 2‧‧‧Substrate film
3‧‧‧基材層 3‧‧‧Substrate layer
4‧‧‧著色層 4‧‧‧Colored layer
5‧‧‧剝離層 5‧‧‧ peeling layer
11‧‧‧工程紙 11‧‧‧Engineering paper
12‧‧‧基材片 12‧‧‧Substrate sheet
15‧‧‧剝離層 15‧‧‧ peeling layer
21‧‧‧工程紙 21‧‧‧Engineering paper
22‧‧‧基材片 22‧‧‧Substrate sheet
23‧‧‧基材層 23‧‧‧Substrate layer
24‧‧‧著色層 24‧‧‧Colored layer
25‧‧‧剝離層 25‧‧‧ peeling layer
圖1是表示本發明的一個實施方式的工程紙的示意剖視圖。 Fig. 1 is a schematic cross-sectional view showing an engineering paper according to an embodiment of the present invention.
圖2是表示與圖1的工程紙不同方式的工程紙的示意剖視圖。 Fig. 2 is a schematic cross-sectional view showing an engineering paper different from the engineering paper of Fig. 1;
圖3是表示與圖1和圖2的工程紙不同方式的工程紙的示意剖視圖。 Fig. 3 is a schematic cross-sectional view showing an engineering paper different from the engineering paper of Figs. 1 and 2;
以下，參照合適的附圖，具體說明本發明的實施方式，首先參照圖1說明本發明的第一實施方式的工程紙。 Hereinafter, an embodiment of the present invention will be specifically described with reference to a suitable drawing. First, the engineering paper according to the first embodiment of the present invention will be described with reference to Fig. 1 .
圖1的工程紙1由基材片2和剝離層5構成，基材片2由基材層3和著色層4構成。工程紙1從背面側(與塗佈樹脂組合物的面相反的一側)依次配置有所述的層。 The engineering paper 1 of Fig. 1 is composed of a base material sheet 2 and a release layer 5, and the base material sheet 2 is composed of a base material layer 3 and a colored layer 4. The above-mentioned layer is disposed in order from the back side (the side opposite to the surface on which the resin composition is applied) on the engineering paper 1.
基材片2構成所述工程紙1的基材部，基材片2包括基材層3和配置於該基材層3表面的著色層4。 The base material sheet 2 constitutes a base material portion of the engineering paper 1, and the base material sheet 2 includes a base material layer 3 and a coloring layer 4 disposed on the surface of the base material layer 3.
用於基材層3的材料沒有特別的限定，例如除了用通常的方法抄制的紙(酸性紙、中性紙、塗佈紙、玻璃紙等)以外，還可以舉出合成樹脂膜、合成紙、無紡布等，作為所述合成樹脂膜，例如可以使用聚烯烴類樹脂、聚碳酸酯類樹脂、聚酯類樹脂等。從價格和耐熱性等方面出發，在所述的材料中特別優選的是紙。 The material used for the base material layer 3 is not particularly limited, and examples thereof include synthetic resin film and synthetic paper, in addition to paper (acid paper, neutral paper, coated paper, cellophane, etc.) which are prepared by a usual method. For the synthetic resin film, for example, a polyolefin resin, a polycarbonate resin, a polyester resin or the like can be used. From the viewpoints of price, heat resistance and the like, paper is particularly preferred among the materials described.
在用於所述基材層3的紙中，可以適當配入施膠劑、紙增強劑、固定劑、成品率提高劑、染料等添加劑等；以及碳酸鈣、高嶺土、二氧化鈦、滑石、氫氧化鋁、白碳等內添加填料。此外，在抄紙工序中，通過塗佈紙增強劑(澱粉、聚乙烯醇等)、表面施膠劑、染料等，可以進行合適的表面處理。作為塗佈所述添加劑等的方法，可以使用習知的方法，可以舉出例如使用施膠壓榨塗佈機、門輥塗佈機等的方法。 In the paper used for the base material layer 3, an additive such as a sizing agent, a paper reinforcing agent, a fixing agent, a yield improver, a dye, or the like; and calcium carbonate, kaolin, titanium oxide, talc, and hydroxide may be appropriately blended; Add filler to aluminum, white carbon, etc. Further, in the papermaking step, a suitable surface treatment can be carried out by coating a paper reinforcing agent (starch, polyvinyl alcohol or the like), a surface sizing agent, a dye or the like. As a method of applying the additive or the like, a conventional method can be used, and for example, a method using a size press coater or a gate roll coater can be mentioned.
作為用於所述基材層3的紙的定量的下限優選的是30g/m2，更優選的是50g/m2，特別優選的是70g/m2。另一方面，作為定量的上限優選的是200g/m2，更優選的是150g/m2，特別優選的是120g/m2。當用於基材層3的紙的定量小於所述下限時，基材層3的韌性和強度降低，所述工程紙1容易發生破裂、褶皺、捲曲等問題。反之，當用於基材層3的紙的定量超過所述上限時，存在工程紙1的生產率降低的問題。 The lower limit of the basis weight of the paper used for the base material layer 3 is preferably 30 g/m 2 , more preferably 50 g/m 2 , and particularly preferably 70 g/m 2 . On the other hand, the upper limit as the basis weight is preferably 200 g/m 2 , more preferably 150 g/m 2 , and particularly preferably 120 g/m 2 . When the basis weight of the paper used for the base material layer 3 is less than the lower limit, the toughness and strength of the base material layer 3 are lowered, and the engineering paper 1 is liable to cause problems such as cracking, wrinkles, curling, and the like. On the other hand, when the amount of paper used for the base material layer 3 exceeds the upper limit, there is a problem that the productivity of the engineering paper 1 is lowered.
作為所述基材層3的厚度，優選的是0.5μm以上1000μm以下，更優選的是1μm以上500μm以下，特別優選的是2μm以上100μm以下。當基材層3的厚度小於所述下限時，存在所述工程紙1的處理變得困難的問題。反之，當基材層3的厚度超過所述上限時，不僅所述工程紙1的緩衝性會降低，而且所述工程紙1 的生產成本上升。 The thickness of the base material layer 3 is preferably 0.5 μm or more and 1000 μm or less, more preferably 1 μm or more and 500 μm or less, and particularly preferably 2 μm or more and 100 μm or less. When the thickness of the base material layer 3 is less than the lower limit, there is a problem that the processing of the engineering paper 1 becomes difficult. On the other hand, when the thickness of the base material layer 3 exceeds the upper limit, not only the cushioning property of the engineering paper 1 is lowered, but also the engineering paper 1 The production costs are rising.
著色層4設置在基材層3的表面。所述著色層4的表面構成從所述工程紙1的表面側能視覺辨認到的均勻著色的著色面。另外，“均勻”是指觀察表面時表面處於沒有深淺(沒有不均)地著色的狀態。 The colored layer 4 is provided on the surface of the substrate layer 3. The surface of the colored layer 4 constitutes a uniformly colored colored surface that can be visually recognized from the surface side of the engineering paper 1. In addition, "uniform" means a state in which the surface is colored without being shallow (no unevenness) when the surface is observed.
作為所述著色層4含有的顏料，可以使用習知的顏料，可以使用無機顏料或有機顏料。作為無機顏料，可以例舉氧化鈦、氧化鐵()、鈷藍、群青、深藍、炭黑、碳酸鈣、高嶺土、黏土、硫酸鋇、滑石、二氧化矽等。作為有機顏料，可以例舉不溶性偶氮顏料、偶氮色澱顏料、縮合偶氮顏料、縮合多環顏料、銅酞菁顏料等。這些顏料可以單獨使用，也可以組合兩種以上使用。在所述顏料中特別優選的是炭黑，因為炭黑可以使著色層4的顏色形成為在樹脂組合物塗佈時工程紙缺陷的視覺辨認的容易性高的黑色，而且能賦予所述工程紙1導電效果。 As the pigment contained in the colored layer 4, a conventional pigment can be used, and an inorganic pigment or an organic pigment can be used. As the inorganic pigment, titanium oxide or iron oxide can be exemplified ( ), cobalt blue, ultramarine blue, dark blue, carbon black, calcium carbonate, kaolin, clay, barium sulfate, talc, cerium oxide, and the like. The organic pigment may, for example, be an insoluble azo pigment, an azo lake pigment, a condensed azo pigment, a condensed polycyclic pigment, a copper phthalocyanine pigment or the like. These pigments may be used singly or in combination of two or more. Among the pigments, carbon black is particularly preferable because carbon black can form the color of the colored layer 4 into black which is highly easy to visually recognize the defects of the engineering paper when the resin composition is applied, and can impart the engineering. Paper 1 conductive effect.
作為著色層4的形成方法，可以採用將含有所述顏料的塗料塗佈在基材層3表面的方法，或採用將塗料印刷在基材層3表面的方法。 As a method of forming the colored layer 4, a method of applying a coating material containing the pigment to the surface of the base material layer 3 or a method of printing a coating material on the surface of the base material layer 3 may be employed.
作為含有所述顏料的塗料的黏合劑樹脂，可以使用習知的樹脂，可以例舉丙烯酸樹脂、聚酯樹脂、醇酸樹脂、氟系樹脂等。 As the binder resin of the coating material containing the pigment, a conventional resin can be used, and examples thereof include an acrylic resin, a polyester resin, an alkyd resin, and a fluorine-based resin.
作為所述著色層4的塗佈量或印刷量，優選的是0.1g/m2以上40g/m2以下。通過將著色層4的塗佈量或印刷量控制在所述範圍，不僅能確保在向所述工程紙1塗佈樹脂組合物時著色層4的視覺辨認度，還可以防止基材層3產生褶皺。 The coating amount or the printing amount of the colored layer 4 is preferably 0.1 g/m 2 or more and 40 g/m 2 or less. By controlling the coating amount or the printing amount of the colored layer 4 within the above range, not only the visibility of the colored layer 4 when the resin composition is applied to the engineering paper 1 but also the substrate layer 3 can be prevented. Wrinkles.
作為所述著色層4具有的顏色的明度，優選的是5以下，更優選的是4以下，特別優選的是3以下。當著色層4具有的顏色的明度超過所述上限時，即著色層4的顏色比較亮的情況下，當在所述工程紙1的表面塗佈樹脂組合物時，著色面的顏色深淺的 視覺辨認度降低，存在塗佈樹脂組合物時難以發現所述工程紙1的表面和樹脂組合物塗佈的缺陷的問題。 The brightness of the color of the colored layer 4 is preferably 5 or less, more preferably 4 or less, and particularly preferably 3 or less. When the brightness of the color of the colored layer 4 exceeds the upper limit, that is, when the color of the colored layer 4 is relatively bright, when the resin composition is coated on the surface of the engineering paper 1, the color of the colored surface is shallow The visibility is lowered, and there is a problem that it is difficult to find the surface of the engineering paper 1 and the defects of the coating of the resin composition when the resin composition is applied.
此外，作為所述著色層4具有的顏色的彩度，雖然沒有特別的限定，但是優選的是1以下，更優選的是0.5以下，特別優選的是0.1以下。通過使著色層4具有的顏色的明度在所述的範圍內，並且使彩度處於所述範圍，即通過使著色層4的顏色成為黑色，在所述工程紙1上塗佈透明或乳白色的樹脂組合物時容易辨認到塗佈不均，因此能進一步提高在樹脂組合物塗佈時所述工程紙1的表面和樹脂組合物塗佈的缺陷的視覺辨認的容易性。 Further, although the color of the color of the colored layer 4 is not particularly limited, it is preferably 1 or less, more preferably 0.5 or less, and particularly preferably 0.1 or less. By making the brightness of the color of the colored layer 4 within the above range and causing the chroma to be in the range, that is, by making the color of the colored layer 4 black, the engineering paper 1 is coated with a transparent or milky white color. In the case of the resin composition, coating unevenness is easily recognized, so that the ease of visual recognition of the surface of the engineering paper 1 and the coating of the resin composition at the time of application of the resin composition can be further improved.
另外，為了防止後述的剝離層5的成分浸透構成基材層3的紙，可以通過向水溶性高分子或聚乙烯等中添加所述顏料來形成著色層4。作為所述水溶性高分子，可以例舉聚丙烯醯胺、聚丙烯酸、聚甲基丙烯酸、聚衣康酸、聚乙烯醇、聚環氧乙烷、聚乙烯吡咯烷酮、聚乙烯基甲基醚、聚乙二醇、甲基纖維素、乙基纖維素、接基甲基纖維素、羥基甲基纖維素、海藻酸鈉、澱粉、酪蛋白、明膠等，這些物質可以單獨使用，也可以組合兩種以上使用。 In addition, in order to prevent the components of the peeling layer 5 to be described later from impregnating the paper constituting the base material layer 3, the coloring layer 4 can be formed by adding the pigment to a water-soluble polymer or polyethylene. The water-soluble polymer may, for example, be polyacrylamide, polyacrylic acid, polymethacrylic acid, polyitaconic acid, polyvinyl alcohol, polyethylene oxide, polyvinylpyrrolidone or polyvinyl methyl ether. Polyethylene glycol, methyl cellulose, ethyl cellulose, methine methyl cellulose, hydroxymethyl cellulose, sodium alginate, starch, casein, gelatin, etc., these materials may be used alone or in combination More than one kind.
此外，著色層4中可以添加著色目的以外的、用於提高所述浸透防止效果的顏料。作為該顏料沒有特別的限定，可以使用無機顏料或有機顏料。作為無機顏料，可以例舉所述無機顏料以外的氧化鋅、氧化鋁、氫氧化鎂、氫氧化鋁、矽酸、砂()等。此外，作為有機顏料，可以例舉尼龍、三聚氰胺、聚苯乙烯、聚乙烯、聚丙烯、特氟龍(註冊商標)、矽、澱粉、丙烯酸樹脂等。 Further, a pigment other than the purpose of coloring for improving the penetration preventing effect may be added to the colored layer 4. The pigment is not particularly limited, and an inorganic pigment or an organic pigment can be used. The inorganic pigment may, for example, be zinc oxide, aluminum oxide, magnesium hydroxide, aluminum hydroxide, citric acid or sand other than the inorganic pigment. )Wait. Further, examples of the organic pigment include nylon, melamine, polystyrene, polyethylene, polypropylene, Teflon (registered trademark), hydrazine, starch, and acrylic resin.
此外，著色層4中可以適當配入增塑劑、分散劑、乳化劑、增稠劑、消泡劑、防腐劑、乾燥劑、抗靜電劑、阻燃劑等添加劑。此外特別是在不妨礙與剝離層5的黏合性的範圍內可以添加固化劑。在層疊剝離層5之前的所述工程紙1的製造工序中，在將基材層3和著色層4構成的片形成輥狀的情況下，為了防止因吸濕發生結塊而添加所述固化劑。作為所述固化劑，例如可以使用鉻 酸、乙二醛等。此外，在不損害與基材層3的黏合性的範圍內可以配入抗紫外線劑、抗靜電劑等。此外，為了提高與剝離層5的黏合性，在著色層4中可以添加規定量的剝離層5的形成成分。 Further, an additive such as a plasticizer, a dispersant, an emulsifier, a thickener, an antifoaming agent, a preservative, a desiccant, an antistatic agent, or a flame retardant may be appropriately added to the colored layer 4. Further, a curing agent may be added in particular insofar as it does not interfere with the adhesion to the release layer 5. In the manufacturing process of the engineering paper 1 before laminating the peeling layer 5, when the sheet consisting of the base material layer 3 and the colored layer 4 is formed into a roll shape, the solidification is added in order to prevent agglomeration due to moisture absorption. Agent. As the curing agent, for example, chromium can be used. Acid, glyoxal, etc. Further, an anti-UV agent, an antistatic agent, or the like may be blended in a range that does not impair the adhesion to the base material layer 3. Further, in order to improve the adhesion to the peeling layer 5, a predetermined amount of the forming component of the peeling layer 5 may be added to the colored layer 4.
剝離層5層疊於基材片2的表面側，具體而言，剝離層5層疊在所述著色層4的表面。作為剝離層5的形成材料，只要是在固體狀態下是透明的材料就沒有特別的限定，例如可以採用矽樹脂、聚丙烯樹脂、聚乙烯樹脂、氨基醇酸樹脂等。在這些材料中優選的是剝離力小、樹脂組合物固化體的剝離性優異的矽樹脂。 The release layer 5 is laminated on the surface side of the base material sheet 2, and specifically, the release layer 5 is laminated on the surface of the colored layer 4. The material for forming the release layer 5 is not particularly limited as long as it is transparent in a solid state, and for example, an anthracene resin, a polypropylene resin, a polyethylene resin, an amino alkyd resin or the like can be used. Among these materials, an anthracene resin having a small peeling force and excellent releasability of a cured resin composition is preferable.
為了提高剝離性，在所述剝離層5中可以添加石蠟類、表面活性劑、表面改性劑等。此外，也可以添加催化劑、染料、分散劑等添加劑。 In order to improve the peelability, a paraffin, a surfactant, a surface modifier, or the like may be added to the release layer 5. Further, additives such as a catalyst, a dye, and a dispersant may be added.
作為所述剝離層5的層疊量的下限，優選的是1g/m2，更優選的是2g/m2，特別優選的是3g/m2。另一方面，作為剝離層5的層疊量的上限，優選的是20g/m2，更優選的是10g/m2，特別優選的是5g/m2。當剝離層5的層疊量低於所述下限時，難以在著色層4的表面均勻塗佈，存在不能形成良好的剝離面的問題。反之，當剝離層5的層疊量超過所述上限時，不僅所述工程紙1的生產成本會增加，而且不能得到與層疊量成比例的剝離性的提高。 The lower limit of the amount of the release layer 5 to be laminated is preferably 1 g/m 2 , more preferably 2 g/m 2 , and particularly preferably 3 g/m 2 . On the other hand, the upper limit of the amount of lamination of the release layer 5 is preferably 20 g/m 2 , more preferably 10 g/m 2 , and particularly preferably 5 g/m 2 . When the lamination amount of the peeling layer 5 is less than the lower limit, it is difficult to apply uniformly on the surface of the colored layer 4, and there is a problem that a good peeling surface cannot be formed. On the other hand, when the lamination amount of the peeling layer 5 exceeds the upper limit, not only the production cost of the engineering paper 1 but also the peeling property in proportion to the lamination amount cannot be improved.
作為所述基材片2與剝離層5之間的剝離強度的下限，優選的是0.02N/5cm，更優選的是0.05N/5cm。另一方面，作為剝離強度的上限，優選的是5N/5cm，更優選的是1N/5cm。如果基材片2與剝離層5之間的剝離強度低於所述下限，則在移送所述工程紙1時以及在塗佈樹脂組合物時存在基材片2與剝離層5意外分離的問題。反之，如果所述剝離強度超過所述上限，則剝離層5難以從基材片2剝離，例如在形成聚氨酯片時，存在製造效率惡化的問題。另外，所述剝離強度通過以下的方法測定。首先對基材片與剝離層層疊後的片按照JIS P 8111進行預處理，裁切成寬度 50mm、長度200mm的實驗片。將所述實驗片的一個面用雙面膠帶黏貼在金屬板上，以實驗片的長度方向成為垂直方向的方式設置金屬板。接著，剝離實驗片的下側部分，將剝離層的一部分向上方卷起並用夾具夾住。將所述用夾具夾住的部分以300mm/min的拉伸強度向上方拉伸，並測定所述期間的應力，將所述應力的平均值作為基材片與剝離層的剝離強度。 The lower limit of the peeling strength between the base material sheet 2 and the peeling layer 5 is preferably 0.02 N/5 cm, and more preferably 0.05 N/5 cm. On the other hand, as the upper limit of the peel strength, it is preferably 5 N/5 cm, and more preferably 1 N/5 cm. If the peel strength between the substrate sheet 2 and the peeling layer 5 is lower than the lower limit, there is a problem that the substrate sheet 2 and the peeling layer 5 are accidentally separated when the engineering paper 1 is transferred and when the resin composition is applied. . On the other hand, when the peeling strength exceeds the upper limit, the peeling layer 5 is hardly peeled off from the base material sheet 2, and for example, when the polyurethane sheet is formed, there is a problem that the production efficiency is deteriorated. Further, the peel strength was measured by the following method. First, the sheet laminated with the base sheet and the peeling layer is pretreated according to JIS P 8111, and cut into width. A test piece of 50 mm and a length of 200 mm. One surface of the test piece was adhered to a metal plate with a double-sided tape, and a metal plate was provided so that the longitudinal direction of the test piece became a vertical direction. Next, the lower portion of the test piece was peeled off, and a part of the peeling layer was rolled up and clamped by a jig. The portion sandwiched by the jig was stretched upward at a tensile strength of 300 mm/min, and the stress during the period was measured, and the average value of the stress was defined as the peel strength of the substrate sheet and the release layer.
所述工程紙1具有著色層4，所述著色層4形成在構成基材片2的基材層3的表面且明度為5以下，當在剝離層5上塗佈聚氨酯片或合成皮革等原料樹脂組合物時，著色層4的表面透過剝離層5和樹脂組合物的塗佈膜作為著色面被視覺辨認到。因此，通過確認所述著色面(著色層4的表面)的視覺辨認到的顏色的深淺的差異，在塗佈樹脂組合物階段中，能通過目視容易地發現所述工程紙1的表面和樹脂組合物的塗佈有無缺陷，從而能夠將聚氨酯片或合成皮革等的製造工序中的損失控制在最小限度。 The engineering paper 1 has a colored layer 4 formed on the surface of the base material layer 3 constituting the base material sheet 2 and having a brightness of 5 or less. When the release layer 5 is coated with a raw material such as a polyurethane sheet or a synthetic leather. In the case of the resin composition, the surface of the colored layer 4 is transmitted through the release layer 5 and the coating film of the resin composition as a colored surface. Therefore, by confirming the difference in the depth of the visually recognized color of the colored surface (the surface of the colored layer 4), the surface of the engineering paper 1 and the resin can be easily found by visual observation in the stage of applying the resin composition. The coating of the composition is free from defects, and the loss in the production process of the polyurethane sheet or the synthetic leather can be minimized.
作為所述工程紙1的製造方法沒有特別的限定，可以例舉下述方法：在通過抄紙或擠出成形等得到的基材層3的表面形成著色層4，進而在著色層4的表面層疊剝離層5。 The method for producing the engineering paper 1 is not particularly limited, and a method in which the coloring layer 4 is formed on the surface of the base material layer 3 obtained by papermaking, extrusion molding, or the like, and further laminated on the surface of the colored layer 4 is exemplified. Peel layer 5.
當使用紙作為基材層3的材料時，構成所述基材層3的紙的抄造方法沒有特別的限定，可以採用習知的方法。具體而言，可以例舉長網方式、雙網方式、夾網成形器方式、圓網方式等。 When paper is used as the material of the base material layer 3, the papermaking method of the paper constituting the base material layer 3 is not particularly limited, and a conventional method can be employed. Specifically, a long net method, a double net method, a mesh former method, a rotary screen method, or the like can be exemplified.
作為在基材層3的表面側形成著色層4的方法，可以採用在基材層3的表面塗佈或印刷所述塗料的方法。作為塗佈方法，可以例舉使用輥式塗佈機、棒塗佈機、刮刀塗佈機、旋轉塗佈機、凹印塗佈機、流塗機、氣刀、噴塗等的塗佈法。作為印刷方法，除了凹版印刷以外，可以例舉凸版印刷、絲網印刷、轉印印刷、柔印印刷等。此外，在著色層4含有防止剝離層5的成分浸透用 的水溶性高分子等時，可以採用使用所述的塗佈方法將著色層4的形成材料塗佈在基材層3的表面來形成著色層4。 As a method of forming the color layer 4 on the surface side of the base material layer 3, a method of coating or printing the coating material on the surface of the base material layer 3 can be employed. As the coating method, a coating method using a roll coater, a bar coater, a knife coater, a spin coater, a gravure coater, a flow coater, an air knife, a spray coating, or the like can be exemplified. As the printing method, in addition to gravure printing, relief printing, screen printing, transfer printing, flexographic printing, and the like can be exemplified. Further, the colored layer 4 contains a component for preventing penetration of the peeling layer 5 When the water-soluble polymer or the like is used, the coloring layer 4 can be formed by applying the forming material of the colored layer 4 on the surface of the base material layer 3 by the above-described coating method.
作為在著色層4的表面層疊剝離層5的方法，例如可以使用下述方法：將所述的剝離層5的形成材料塗佈在著色層4的表面，然後使塗佈後的所述形成材料乾燥來形成剝離層5。或者，可以採用通過將剝離層5的材料擠出到著色層4的表面來形成剝離層5的方法。或者，可以採用將剝離層5的材料成形為膜狀後，塗佈黏合劑，然後將膜狀材料層疊到著色層4表面的方法。作為所述塗佈方法，可以採用與所述的著色層4的形成工序中使用過的方法相同的方法。此外，作為所述擠出方法，可以例舉T模法、吹膜法等。此外，作為所述膜成形方法，可以採用擠出法、澆鑄成形法、切削法等，作為所述黏合劑，例如可以使用層疊用黏合劑、熔融擠出樹脂等。 As a method of laminating the release layer 5 on the surface of the colored layer 4, for example, a method of coating the formation material of the release layer 5 on the surface of the colored layer 4, and then forming the formed material after coating can be used. Dry to form the peeling layer 5. Alternatively, a method of forming the peeling layer 5 by extruding the material of the peeling layer 5 to the surface of the colored layer 4 may be employed. Alternatively, a method in which the material of the release layer 5 is formed into a film shape, a binder is applied, and then the film material is laminated on the surface of the colored layer 4 may be employed. As the coating method, the same method as that used in the step of forming the coloring layer 4 described above can be employed. Further, as the extrusion method, a T-die method, a blown film method, or the like can be exemplified. In addition, as the film forming method, an extrusion method, a casting method, a cutting method, or the like can be used, and as the binder, for example, a laminating adhesive, a melt-extruded resin, or the like can be used.
圖2的工程紙11由基材片12和剝離層15構成。工程紙11從背面側依次設置有所述的層。 The engineering paper 11 of Fig. 2 is composed of a base material sheet 12 and a peeling layer 15. The engineered paper 11 is provided with the above-described layers in order from the back side.
基材片12構成所述工程紙11的基材部。所述基材片12與第一實施方式的不同，沒有著色層而僅由基材層構成。另外，由於基材片12的材料、定量、厚度等與第一實施方式的基材層3的相同，故省略說明。 The base material sheet 12 constitutes a base material portion of the engineering paper 11. Unlike the first embodiment, the base material sheet 12 is composed of only a base material layer without a colored layer. In addition, since the material, the basis weight, the thickness, and the like of the base material sheet 12 are the same as those of the base material layer 3 of the first embodiment, the description thereof will be omitted.
關於剝離層15的材料，可以採用與第一實施方式的剝離層5相同的材料。但是，在本實施方式中，剝離層15含有顏料是必須的條件。通過使剝離層15含有顏料，通過剝離層15的表面構成從所述工程紙11的表面側能視覺辨認到的著色面。 Regarding the material of the peeling layer 15, the same material as the peeling layer 5 of the first embodiment can be employed. However, in the present embodiment, the peeling layer 15 contains a pigment as a necessary condition. When the release layer 15 contains a pigment, the surface of the release layer 15 constitutes a colored surface that can be visually recognized from the surface side of the engineering paper 11.
作為所述剝離層15中添加的著色用的顏料，可以採用與所述的第一實施方式的著色層4使用的相同的顏料，其中優選的是炭 黑，因為炭黑可以將剝離層15的顏色形成為樹脂組合物塗佈時缺陷的視覺辨認的容易性高的黑色，並且可以賦予所述工程紙11導電效果。 As the pigment for coloring added to the release layer 15, the same pigment as that used for the coloring layer 4 of the first embodiment described above can be used, and among them, carbon is preferable. Black, because carbon black can form the color of the peeling layer 15 into black which is highly easy to visually recognize defects when the resin composition is applied, and can impart a conductive effect to the engineering paper 11.
所述剝離層15中添加的顏料的添加量，可以適當調節為使剝離層15的表面均勻著色的量。此外，優選的是在所述剝離層15中添加分散劑，以使顏料均勻分散。 The amount of the pigment added to the release layer 15 can be appropriately adjusted to an amount such that the surface of the release layer 15 is uniformly colored. Further, it is preferred to add a dispersing agent to the peeling layer 15 to uniformly disperse the pigment.
作為所述剝離層15具有的顏色的明度，優選的是5以下，更優選的是4以下，特別優選的是3以下。當剝離層15具有的顏色的明度超過所述上限時，即剝離層15的顏色比較亮的情況下，在所述工程紙11的表面塗佈樹脂組合物時的、著色面的顏色深淺的視覺辨認度降低，存在樹脂組合物塗佈時難以發現所述工程紙11表面和樹脂組合物塗佈的缺陷的問題。 The brightness of the color of the peeling layer 15 is preferably 5 or less, more preferably 4 or less, and particularly preferably 3 or less. When the lightness of the color of the peeling layer 15 exceeds the upper limit, that is, when the color of the peeling layer 15 is relatively bright, the color of the colored surface when the resin composition is applied to the surface of the engineering paper 11 is shallow The degree of visibility is lowered, and there is a problem that it is difficult to find defects in the surface of the engineering paper 11 and the coating of the resin composition at the time of coating the resin composition.
此外，作為所述剝離層15所具有的顏色的彩度，雖然沒有特別的限定，但是優選的是1以下，更優選的是0.5以下，特別優選的是0.1以下。通過將剝離層15所具有的顏色的明度設定在所述的範圍，並且將顏色的彩度設定在所述範圍，以使剝離層15的顏色成為黑色，在所述工程紙上塗佈透明或乳白色的樹脂組合物時容易辨認塗佈不均，因此能進一步提高所述工程紙11的樹脂組合物塗佈時缺陷的視覺辨認的容易性。 Further, although the color of the color of the peeling layer 15 is not particularly limited, it is preferably 1 or less, more preferably 0.5 or less, and particularly preferably 0.1 or less. By setting the brightness of the color of the peeling layer 15 to the above range, and setting the chroma of the color to the range so that the color of the peeling layer 15 becomes black, a transparent or milky white coating is applied to the engineering paper. In the resin composition, coating unevenness is easily recognized, and thus the ease of visual recognition of defects in the coating of the resin composition of the engineering paper 11 can be further improved.
所述工程紙11能實現與所述第一實施方式的工程紙1相同的功能。即，由於所述工程紙11的剝離層15的著色為明度5以下的顏色，所以在剝離層15上塗佈聚氨酯片或合成皮革等的原料樹脂組合物時，剝離層15的表面透過樹脂組合物的塗佈膜作為著色面被視覺辨認到。因此，通過確認所述著色面(剝離層15的表面)的視覺辨認到的顏色的深淺的差異，在塗佈樹脂組合物的階段中，能夠用目視容易地發現所述工程紙11的表面和樹脂組合物的塗佈有無缺陷，可以將聚氨酯片或合成皮革等的製造工序中的損 失控制在最小程度。此外，由於所述工程紙11無需在基材層(基材片)上塗佈或印刷塗料的工序，因此與所述第一實施方式相比，製造工序得到簡化。 The engineering paper 11 can achieve the same function as the engineering paper 1 of the first embodiment. In other words, since the color of the peeling layer 15 of the engineering paper 11 is a color having a brightness of 5 or less, when the raw material resin composition such as a urethane sheet or a synthetic leather is applied onto the release layer 15, the surface of the release layer 15 is permeable to the resin combination. The coated film of the object was visually recognized as a colored surface. Therefore, by confirming the difference in the depth of the visually recognized color of the colored surface (the surface of the peeling layer 15), the surface of the engineering paper 11 can be easily visually observed in the stage of applying the resin composition. The coating of the resin composition is free from defects, and can be damaged in the production process of a polyurethane sheet or a synthetic leather. Loss of control to a minimum. Further, since the engineering paper 11 does not need to be coated or printed on the base material layer (substrate sheet), the manufacturing process is simplified as compared with the first embodiment.
圖3的工程紙21由基材片22和剝離層25構成，基材片22由基材層23和著色層24構成。工程紙21從背面側依次具有所述層。 The engineering paper 21 of FIG. 3 is composed of a base material sheet 22 and a peeling layer 25, and the base material sheet 22 is composed of a base material layer 23 and a colored layer 24. The engineering paper 21 has the layer in this order from the back side.
基材片22構成所述工程紙21的基材部，具有基材層23以及設置於所述基材層的背面的著色層24。 The base material sheet 22 constitutes a base material portion of the engineering paper 21, and has a base material layer 23 and a coloring layer 24 provided on the back surface of the base material layer.
基材層23由透明的合成樹脂膜形成。作為所述合成樹脂，例如可以使用聚烯烴類樹脂、聚碳酸酯類樹脂、聚酯類樹脂、矽類樹脂等，這些材料可以單獨使用，也可以組合兩種以上使用。在所述樹脂中，優選的是耐熱性等各功能面與價格面的平衡優異的聚對苯二甲酸乙二醇酯。 The base material layer 23 is formed of a transparent synthetic resin film. As the synthetic resin, for example, a polyolefin resin, a polycarbonate resin, a polyester resin, an anthraquinone resin or the like can be used, and these materials may be used singly or in combination of two or more. Among the above-mentioned resins, polyethylene terephthalate having excellent balance between each functional surface and a price surface such as heat resistance is preferable.
為了對加工性、耐熱性、機械性能、尺寸穩定性等進行改良、改進，在所述基材層23的形成材料中可以混合各種添加劑等。作為所述添加劑，可以例舉潤滑劑、交聯劑、抗氧化劑、填充劑、強化纖維、增強劑、抗靜電劑、防燃劑、阻燃劑、發泡劑、防黴劑等。 In order to improve and improve workability, heat resistance, mechanical properties, dimensional stability, and the like, various additives and the like may be mixed in the material for forming the base material layer 23. As the additive, a lubricant, a crosslinking agent, an antioxidant, a filler, a reinforcing fiber, a reinforcing agent, an antistatic agent, a flame retardant, a flame retardant, a foaming agent, a mold inhibitor, and the like can be exemplified.
著色層24設置在基材層23的背面，具體而言，通過在基材層23的背面均勻塗佈或印刷塗料而形成著色層24。所述著色層24的表面構成從所述工程紙21的表面側能視覺辨認到的著色面。由於形成著色層24的塗料、塗佈量(印刷量)、形成方法與所述第一實施方式的工程紙1具有的著色層4的相同，故省略說明。此外，關於著色層24所具有的顏色的明度和彩度，也優選的 是與所述第一實施方式的著色層4的範圍相同。 The colored layer 24 is provided on the back surface of the base material layer 23, and specifically, the colored layer 24 is formed by uniformly coating or printing a paint on the back surface of the base material layer 23. The surface of the colored layer 24 constitutes a colored surface that can be visually recognized from the surface side of the engineering paper 21. Since the coating material, the coating amount (printing amount), and the forming method of forming the coloring layer 24 are the same as those of the coloring layer 4 of the engineering paper 1 of the first embodiment, the description thereof will be omitted. Further, it is also preferable regarding the brightness and chroma of the color which the colored layer 24 has. It is the same as the range of the coloring layer 4 of the first embodiment.
由於剝離層25的材料、厚度等與第一實施方式的剝離層5的相同，故省略說明。 Since the material, thickness, and the like of the peeling layer 25 are the same as those of the peeling layer 5 of the first embodiment, the description thereof will be omitted.
所述工程紙21能實現與所述第一實施方式的工程紙1和第二實施方式的工程紙11相同的功能。即，由於所述工程紙21的基材層23是透明的、且基材層23的背面設置有著色層24，因此在剝離層25上塗佈聚氨酯片或合成皮革等的原料樹脂組合物時，著色層24的表面透過基材層23、剝離層25和樹脂組合物的塗佈膜，作為著色面被視覺辨認到。因此，通過確認所述著色面(著色層24的表面)的視覺辨認到的顏色的深淺的差異，在塗佈樹脂組合物的階段中，能夠用目視容易地發現所述工程紙21的表面和樹脂組合物的塗佈有無缺陷，從而能將聚氨酯片或合成皮革等的製造工序中的損失控制在最小限度。此外，由於所述工程紙21的基材層23的背面具有著色層24，並且所述著色層24上沒有重疊其他的層，所以與所述第一實施方式相比，可以降低在所述工程紙的製造工序中著色層24被汙損的可能性。因此，可以進一步提高缺陷的視覺辨認的容易性。 The engineering paper 21 can achieve the same functions as the engineering paper 1 of the first embodiment and the engineering paper 11 of the second embodiment. In other words, since the base material layer 23 of the engineering paper 21 is transparent and the colored layer 24 is provided on the back surface of the base material layer 23, when the raw material resin composition such as a polyurethane sheet or synthetic leather is applied onto the release layer 25 The surface of the colored layer 24 is transmitted through the substrate layer 23, the release layer 25, and the coating film of the resin composition, and is visually recognized as a colored surface. Therefore, by confirming the difference in the depth of the visually recognized color of the colored surface (the surface of the colored layer 24), the surface of the engineering paper 21 can be easily visually observed in the stage of applying the resin composition. The coating of the resin composition is free from defects, and the loss in the production process of the polyurethane sheet or the synthetic leather can be minimized. Further, since the back surface of the base material layer 23 of the engineering paper 21 has the colored layer 24, and the other layers are not overlapped on the colored layer 24, the engineering can be reduced as compared with the first embodiment. The possibility that the colored layer 24 is stained in the paper manufacturing process. Therefore, the easiness of visual recognition of defects can be further improved.
本發明的工程紙不限於所述的實施方式，也可以採用以下的實施方式。 The engineering paper of the present invention is not limited to the above-described embodiment, and the following embodiments may be employed.
在所述第二實施方式的工程紙11中，可以在基材片12和剝離層15之間設置填充層(目止層)。通過這樣設置填充層，可以防止剝離層15的成分浸透到基材片12。另外，為提高缺陷的視覺辨認的容易性，可以對所述填充層著色。 In the engineering paper 11 of the second embodiment, a filling layer may be provided between the base material sheet 12 and the peeling layer 15 Floor). By providing the filling layer in this manner, it is possible to prevent the components of the peeling layer 15 from penetrating into the base material sheet 12. Further, in order to improve the ease of visual recognition of defects, the filling layer may be colored.
此外，在所述第一實施方式的工程紙1和第三實施方式的工程紙21中，可以分別通過顏料對剝離層著色。通過使剝離層著色， 因著色層的表面構成的著色面與剝離層的表面構成的著色面的協同作用，能提高從工程紙的表面側視覺辨認到的顏色的濃度，從而能提高缺陷的視覺辨認的容易性。此外，在第三實施方式的工程紙21上，可以在基材層23的表面側進一步設置著色層。這樣，能進一步提高工程紙的視覺辨認到的顏色的濃度。 Further, in the engineering paper 1 of the first embodiment and the engineering paper 21 of the third embodiment, the release layer may be colored by a pigment, respectively. By coloring the release layer, The synergistic effect of the colored surface formed on the surface of the colored layer and the colored surface formed on the surface of the release layer can increase the density of the color visually recognized from the surface side of the engineering paper, thereby improving the ease of visual recognition of defects. Further, on the engineering paper 21 of the third embodiment, a colored layer may be further provided on the surface side of the base material layer 23. In this way, the concentration of the visually recognized color of the engineering paper can be further improved.
此外，本發明的工程紙，通過在剝離層中含有無機顏料和有機顏料等無光劑使工程紙形成墊形狀，由此可以在表面需要無光處理的合成皮革的製造中使用。 Further, the engineering paper of the present invention can be used in the production of synthetic leather having a matte finish on the surface by forming a mat shape of the engineering paper by including a matting agent such as an inorganic pigment and an organic pigment in the release layer.
如上所述，本發明的工程紙在塗佈聚氨酯片或合成皮革等的原料樹脂組合物時，能容易地發現工程紙表面和樹脂組合物塗佈的缺陷。 As described above, when the engineering paper of the present invention is coated with a raw material resin composition such as a polyurethane sheet or a synthetic leather, defects in the surface of the engineering paper and the coating of the resin composition can be easily found.
1‧‧‧工程紙 1‧‧‧Engineering paper
2‧‧‧基材片 2‧‧‧Substrate film
3‧‧‧基材層 3‧‧‧Substrate layer
4‧‧‧著色層 4‧‧‧Colored layer
5‧‧‧剝離層 5‧‧‧ peeling layer
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| JP2012008248A JP5809566B2 (en) | 2012-01-18 | 2012-01-18 | Process paper |
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| TWI561392B TWI561392B (en) | 2016-12-11 |
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| TWI645968B (en) * | 2016-11-08 | 2019-01-01 | 日商惠和股份有限公司 | Polyurethane coating forming process paper |
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| JP6673982B2 (en) * | 2018-06-11 | 2020-04-01 | 恵和株式会社 | Process paper for forming polyurethane coat layer |
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| JP2006300575A (en) * | 2005-04-18 | 2006-11-02 | Panac Co Ltd | Base paper for coating layer inspection and inspection method |
| JP4933973B2 (en) * | 2007-07-25 | 2012-05-16 | 大王製紙株式会社 | Multilayer paper, laminated sheet and method for producing the laminated sheet |
| CN101821094B (en) * | 2007-10-17 | 2013-03-20 | 王子达克株式会社 | Base material sheet for process strippable sheet, process strippable sheet, and process for producing synthetic leather |
| JP2010084264A (en) * | 2008-09-30 | 2010-04-15 | Dainippon Printing Co Ltd | Process release paper |
| JP5043057B2 (en) * | 2009-03-09 | 2012-10-10 | 王子特殊紙株式会社 | Process paper for electrode-type bread and electrode-type bread making method |
| CN101608416B (en) * | 2009-07-09 | 2010-12-08 | 上海金大塑胶有限公司 | Environment friendly release paper coated with silicon partially and preparation method thereof |
| CN102296466B (en) * | 2011-08-15 | 2013-01-02 | 浙江科一合成革有限公司 | Superfine fiber synthetic leather and production method |
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| CN103213355B (en) | 2016-02-17 |
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