JP2015009558A - Thermal transfer receiving sheet - Google Patents

Thermal transfer receiving sheet Download PDF

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JP2015009558A
JP2015009558A JP2013145878A JP2013145878A JP2015009558A JP 2015009558 A JP2015009558 A JP 2015009558A JP 2013145878 A JP2013145878 A JP 2013145878A JP 2013145878 A JP2013145878 A JP 2013145878A JP 2015009558 A JP2015009558 A JP 2015009558A
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resin
receiving layer
parts
thermal transfer
resistance
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大悟 宇都宮
Daigo Utsunomiya
大悟 宇都宮
豊田 幹夫
Mikio Toyoda
幹夫 豊田
和洋 曽和
Kazuhiro Sowa
和洋 曽和
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Dynic Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a new thermal transfer receiving sheet which is excellent in cost performance, has very good alcohol resistance without causing defects of printed images even after subjected to an alcohol immersion step for a long time, can uniformly transfer images without printing defects even using a thermal transfer ink sheet of resin type and has excellent scratch resistance and blocking resistance.SOLUTION: There is provided a thermal transfer receiving sheet in which only one receiving layer is provided on one surface of a resin substrate, wherein the receiving layer is composed mainly of a polyester-based resin having a glass transition point of -30 to 60°C, a multivalent carbodiimide resin and hydrophobic silica.

Description

本発明は、熱溶融型転写記録方式に用いられる熱転写受容シートに関し、特にラベル類やカード類などに有用な熱転写受容シートに関する。  The present invention relates to a thermal transfer receiving sheet used in a hot melt transfer recording system, and more particularly to a thermal transfer receiving sheet useful for labels and cards.

熱転写インクシートとサーマルヘッドとを利用する熱溶融型転写記録方式は、プリンタの構造が簡単で保守が容易であるため、製造業、流通業、小売業等で一般的に広く用いられている。有効期限や発行日などを可視情報として記録することが要求されている物流ラベルなどのラベル類や、会員カードやプリペイドカードなどのカード類などの用途で広く用いられている。  A thermal melt transfer recording system using a thermal transfer ink sheet and a thermal head is generally widely used in manufacturing, distribution, retail, etc. because of its simple printer structure and easy maintenance. It is widely used for applications such as physical distribution labels and the like, which are required to record the expiration date and issue date as visible information, and cards such as membership cards and prepaid cards.

物流用ラベルは近年特に食品分野や薬事・医療分野の製造工程において使用される事が多く、その際に製品に貼り付けられた状態でアルコール消毒されたり、アルコールで浸されたタオルで拭き取りされたりする工程が含まれることがある。この様な用途においては、熱転写インクシートは、従来の熱感度の良いワックスタイプでは耐アルコール性を満たす事が出来ない為に、耐アルコール性や画像信頼性の高いレジンタイプの鉄転写インクシートを使用する必要があるが、熱感度が悪く、画像の欠損が発生するなど印字画像転写均一性に劣る問題があった。  In recent years, logistics labels are often used in the manufacturing process of the food field, pharmaceutical affairs, and medical field. At that time, they are sterilized with alcohol or wiped with a towel soaked in alcohol. May include a step of performing. In such applications, the heat transfer ink sheet cannot satisfy the alcohol resistance with the conventional heat sensitive wax type. Therefore, the resin transfer type iron transfer ink sheet with high alcohol resistance and image reliability is used. Although it is necessary to use, there is a problem that the printed image transfer uniformity is inferior, such as poor thermal sensitivity and image loss.

そのような背景のもとで、レジンタイプの熱転写インクシートの印字画像転写均一性に優れ、さらに耐アルコール性にも優れた熱転写受容シートが求められていたが、従来の熱転写受容シートでは性能を充分に満足に出来るものがなかった。  Under such circumstances, there has been a demand for a thermal transfer receiving sheet that is excellent in the uniformity of printed image transfer of resin-type thermal transfer ink sheets and is also excellent in alcohol resistance. There was nothing that could be satisfactorily satisfied.

このような問題を全て解決する為に、特許文献1に示すように、ポリプロピレン樹脂の基材上に変性ポリオレフィン樹脂を主成分とするアンダー層を設け、その上にガラス転移点が70℃以上の熱可塑性樹脂とシリカを含有した受容層を積層する事により、レジンタイプの熱転写インクシートを用いても印字画像転写均一性に優れ、耐ブロッキング性、耐擦過性、及び耐アルコール性に優れた熱転写受容シートが開発された。  In order to solve all such problems, as shown in Patent Document 1, an under layer mainly composed of a modified polyolefin resin is provided on a polypropylene resin base material, and a glass transition point of 70 ° C. or higher is provided thereon. By laminating a receiving layer containing a thermoplastic resin and silica, even with a resin-type thermal transfer ink sheet, excellent print image transfer uniformity, thermal transfer with excellent blocking resistance, scratch resistance, and alcohol resistance A receiving sheet was developed.

特開2009−279797号公報JP 2009-29797 A

熱転写受容シートは、近年さらに食品分野や薬事医療品分野での使用が拡大し、求められる要求品質も年々さらに高くなってきている。例えば食品分野の現場においては、近年の食品衛生に対する見直しから、従来よりもアルコール消毒する工程を増やしたり、製品を長時間アルコールに浸漬させて殺菌消毒するような工程を取り入れたりする企業が増えた為に、賞味期限等の可視化情報を記録する熱転写受容シートに対して今まで以上に優れた耐アルコール性能が求められるようになってきた。同様に薬事医療品分野では、薬の有効期限表示用ラベルや患者管理用のリストバンド用シートなどの用途での使用が拡大しており、いずれも医療現場で使用される消毒用アルコール類に対しての優れた耐アルコール性が求められている  In recent years, the use of thermal transfer receptive sheets in the food and pharmaceutical products fields has further expanded, and the required quality has been increasing year by year. For example, in the field of the food field, due to the recent review of food hygiene, more companies have increased the number of alcohol sterilization processes than before, and the number of companies that incorporate sterilization processes by immersing products in alcohol for a long time has increased. For this reason, there has been a demand for better alcohol resistance than ever for thermal transfer receiving sheets that record visualization information such as expiration dates. Similarly, in the pharmaceutical and medical products field, the use of medicines for expiry dates and labels for patient management wristbands is expanding, both of which are used for disinfecting alcohol used in medical settings. Excellent alcohol resistance is required

そこで特許文献1で提案された熱転写受容シートの耐アルコール性を評価したところ、アルコールを拭き付けた後にすぐ拭き取ったり、アルコールを浸みこませたウエス等で拭き取ったりといった短時間の耐アルコール性能は優れているものの、アルコールに長時間浸漬するような長時間の耐アルコール性能に対しては充分な性能を満たす事が出来なかった。  Therefore, when the alcohol resistance of the thermal transfer receiving sheet proposed in Patent Document 1 was evaluated, the alcohol resistance performance in a short time such as wiping immediately after wiping alcohol or wiping with a cloth soaked with alcohol was excellent. However, sufficient performance could not be satisfied for long-time alcohol resistance such as long immersion in alcohol.

さらに特許文献1で提案された熱転写受容シートは、樹脂基材と受容層の間の接着が弱く、層間剥離を防ぐためのアンダー層を設けなくてはならない為に、2層構造になりコストパフォーマンスに優れないという問題点もあった。  Furthermore, the thermal transfer receiving sheet proposed in Patent Document 1 has a two-layer structure because the adhesion between the resin base material and the receiving layer is weak and an underlayer for preventing delamination must be provided. There was also a problem that it was not excellent.

本発明はこのような状況に鑑みてなされたものであり、コストパフォーマンスに優れ、長時間のアルコール浸漬工程を経ても印字された画像が欠損する事のない非常に優れた耐アルコール性能を有し、レジンタイプの熱転写インクシートを用いても画像を均一に印字欠損なく転写する事が可能で、優れた耐擦過性と耐ブロッキング性を有した新規な構成の熱転写受容シートを提供する事が本発明の課題である。  The present invention has been made in view of such circumstances, has excellent cost performance, and has a very excellent alcohol resistance performance in which a printed image is not lost even after a long alcohol dipping step. It is possible to transfer images uniformly even without using resin-type thermal transfer ink sheets, and to provide a novel thermal transfer receiving sheet with excellent scratch resistance and blocking resistance. It is a subject of the invention.

この課題を解決する為に、発明者は、樹脂基材の少なくとも一方の表面に受容層を1層だけ設け、受容層がガラス転移点の範囲が−30〜60℃であるポリエステル系樹脂と多価カルボジイミド樹脂と疎水性シリカを主成分とする事により、コストパフォーマンスに優れ、印字画像転写均一性、耐擦過性及び耐ブロッキング性に優れ、長時間のアルコール浸漬工程を経ても印字された画像が欠損する事のない非常に優れた耐アルコール性能を有した熱転写受容シートを提供する事が可能であることを見出した。  In order to solve this problem, the inventor provided only one receiving layer on at least one surface of a resin base material, and the receiving layer has a glass transition point in the range of −30 to 60 ° C. and many polyester resins. The main component is monovalent carbodiimide resin and hydrophobic silica, so that cost performance is excellent, printing image transfer uniformity, scratch resistance and blocking resistance are excellent, and printed images can be printed even after a long alcohol dipping process. The present inventors have found that it is possible to provide a thermal transfer receiving sheet having a very excellent alcohol resistance without being lost.

さらに発明者は、受容層にポリエステル系樹脂と多価カルボジイミド樹脂とをポリエステル系樹脂/多価カルボジイミド樹脂=100/1〜10/3の重量比で含有させる事によって、熱転写受容シートの印字画像転写均一性と耐アルコール性能をさらに向上させる事が可能であることを見出した。  Furthermore, the inventor makes the receiving layer contain a polyester resin and a polyvalent carbodiimide resin in a weight ratio of polyester resin / polyvalent carbodiimide resin = 100/1 to 10/3, thereby transferring the print image of the thermal transfer receiving sheet. It has been found that uniformity and alcohol resistance can be further improved.

さらに発明者は、受容層に疎水性シリカを受容層全体の5〜15重量%の範囲で含有させる事によって、耐ブロッキング性・耐アルコール性能を向上させる事が可能であることを見出した。  Furthermore, the inventor has found that blocking resistance and alcohol resistance can be improved by incorporating hydrophobic silica in the receiving layer in a range of 5 to 15% by weight of the entire receiving layer.

さらに発明者は、受容層にアミンを添加する事によって、受容層に含まれる樹脂の架橋をさらに促進させ、その結果として耐アルコール性能などの架橋によって得られる効果を向上させる事が可能であることを見出した。  Furthermore, the inventor can further promote the crosslinking of the resin contained in the receiving layer by adding an amine to the receiving layer, and as a result, can improve the effects obtained by the crosslinking such as alcohol resistance performance. I found.

さらに発明者は、樹脂基材にポリプロピレン系樹脂を用いる事によって、コストパフォーマンス、耐アルコール性、ラベルとしての印字走行性やハンドリング性に優れた熱転写受容シートを提供する事が可能であることを見出した。  Furthermore, the inventor has found that by using a polypropylene-based resin as a resin base material, it is possible to provide a thermal transfer receiving sheet excellent in cost performance, alcohol resistance, printing runability as a label, and handling properties. It was.

本発明によれば、樹脂基材の少なくとも一方の表面に受容層を1層だけ設け、受容層がガラス転移点の範囲が−30〜60℃であるポリエステル系樹脂と多価カルボジイミド樹脂と疎水性シリカを主成分とする事により、コストパフォーマンスに優れ、印字画像転写均一性、耐擦過性及び耐ブロッキング性に優れ、長時間のアルコール浸漬工程を経ても印字された画像が欠損する事のない非常に優れた耐アルコール性能を有した熱転写受容シートを提供する事が可能となる。  According to the present invention, only one receiving layer is provided on at least one surface of the resin substrate, and the receiving layer has a glass transition point in the range of −30 to 60 ° C., a polyester resin, a polyvalent carbodiimide resin, and a hydrophobic property. By using silica as the main component, it has excellent cost performance, excellent printed image transfer uniformity, scratch resistance, and blocking resistance, and the printed image is not lost even after a long alcohol dipping process. It is possible to provide a thermal transfer receiving sheet having excellent alcohol resistance.

本発明の実施形態に係る熱転写受容シートを示す模式的断面図である。It is typical sectional drawing which shows the thermal transfer receiving sheet which concerns on embodiment of this invention.

本発明の熱転写受容シート3は、基本的に図1に示すように、樹脂基材1の少なくとも一方の表面に受容層2を一層だけ積層してなる。  The thermal transfer receiving sheet 3 of the present invention is basically formed by laminating only one receiving layer 2 on at least one surface of a resin substrate 1 as shown in FIG.

樹脂基材としては、ポリエステル系樹脂やポリオレフィン系樹脂やポリスチレン系樹脂や塩化ビニル系樹脂やポリアミド系樹脂など一般にラベル等に使用される樹脂であれば使用できるが、ラベル等の使用後の廃棄物処理などの環境問題やコストを考えるとポリオレフィン系樹脂が好ましく、さらにはポリプロピレン系樹脂がラベルとしての印字走行性や使用時のハンドリング性に優れる点などからより好ましい。  As the resin base material, polyester resin, polyolefin resin, polystyrene resin, vinyl chloride resin and polyamide resin can be used as long as they are generally used for labels. In view of environmental problems such as processing and costs, polyolefin resins are preferred, and polypropylene resins are more preferred from the viewpoint of excellent printing runnability as labels and handling properties during use.

樹脂基材の構造としては、前記単一樹脂または混合樹脂からなる透明フィルム及びシート類等、さらにそれらの樹脂に白色顔料や充填剤を加えて成膜した白色不透明フィルム及びシート類、あるいはそれらの樹脂からなる発泡フィルム及びシート等、もしくは前記基材を組み合わせた積層体なども使用できる。  As the structure of the resin base material, transparent films and sheets made of the single resin or mixed resin, white opaque films and sheets formed by adding a white pigment or a filler to those resins, or those films, or the like It is also possible to use a foamed film and sheet made of a resin, or a laminate obtained by combining the base materials.

樹脂基材の厚みは特に限定はされないが、3〜300μmの範囲から使用用途に応じて適宜選択してすればよく、さらに好ましくは10〜200μmの範囲から使用する事が望ましい。基材の厚みが3μmを下回ると、熱転写受容シートの耐久性が乏しくなり、300μmを超えると加工性及び使用時のハンドリング性が悪くなる。  The thickness of the resin base material is not particularly limited, but may be appropriately selected from the range of 3 to 300 μm according to the intended use, and more preferably from 10 to 200 μm. When the thickness of the substrate is less than 3 μm, the durability of the thermal transfer receiving sheet becomes poor, and when it exceeds 300 μm, the workability and handling at the time of use are deteriorated.

本発明の熱転写受容シートは、樹脂基材の上に画像を転写させる為の受容層を直接設ける。  In the thermal transfer receiving sheet of the present invention, a receiving layer for transferring an image is directly provided on a resin substrate.

受容層の塗布量は特に限定されないが0.1〜5.0g/mの範囲から適宜選択されれば良いが、性能とコストのバランスから0.5〜2.0g/mの範囲から選択する事がより好ましい。受容層の塗布量が0.1g/m未満になると印字の転写が不安定になり、さらに耐擦過性も乏しくなる、逆に付着量が5.0g/mを超えるとブロッキング等の問題が発生しやすく、さらに塗料の平滑塗装や塗料乾燥といった加工性が困難になる傾向にある。The coating amount of the receiving layer is not particularly limited only to be appropriately selected from the range of 0.1 to 5.0 g / m 2, but the range of the balance of performance and cost of 0.5 to 2.0 g / m 2 It is more preferable to select. If the coating amount of the receiving layer is less than 0.1 g / m 2 , printing transfer becomes unstable, and the scratch resistance becomes poor. Conversely, if the adhesion amount exceeds 5.0 g / m 2 , problems such as blocking are caused. Tends to occur, and the workability such as smooth coating of paint and drying of paint tends to be difficult.

受容層は、熱可塑性樹脂と架橋剤と疎水性シリカを主成分としている。本発明では、受容層で使用する架橋剤として、多価カルボジイミド樹脂を使用する。多価カルボジイミド樹脂とは、少なくともその構造上カルボジイミド基を2つ以上持つ高分子であり、一般的には、触媒下でのジイソシアネート化合物の脱炭酸縮合反応により得られる。多価カルボジイミド樹脂は、架橋速度が速く、常温でも架橋が促進する上に、塗料としてのポットライフも非常に長いといった優れた性能を有している。  The receiving layer is mainly composed of a thermoplastic resin, a crosslinking agent, and hydrophobic silica. In the present invention, a polyvalent carbodiimide resin is used as a crosslinking agent used in the receiving layer. The polyvalent carbodiimide resin is a polymer having at least two carbodiimide groups because of its structure, and is generally obtained by a decarboxylation condensation reaction of a diisocyanate compound under a catalyst. The polyvalent carbodiimide resin has an excellent performance such that the crosslinking speed is high, the crosslinking is promoted even at room temperature, and the pot life as a paint is very long.

多価カルボジイミド樹脂は、熱可塑性樹脂などに含まれるカルボキシル基等の官能基と反応し架橋する事によって、接着性樹脂の表面強度や耐加水分解性や耐アルコール性を飛躍的に向上させる。また多価カルボジイミド樹脂を添加する事により、樹脂基材表面に存在する官能基とも反応し、樹脂基材と受容層との間の密着強度を格段に向上させる事が出来る。  The polyvalent carbodiimide resin dramatically improves the surface strength, hydrolysis resistance, and alcohol resistance of the adhesive resin by reacting with a functional group such as a carboxyl group contained in the thermoplastic resin and crosslinking. Moreover, by adding a polyvalent carbodiimide resin, it reacts also with the functional group which exists on the resin base-material surface, and can improve the adhesive strength between a resin base material and a receiving layer markedly.

受容層に使用される熱可塑性樹脂は、多価カルボジイミド樹脂によって架橋される事によって優れた性能を発揮する。その為に、熱可塑性樹脂が含有量は限定されないが少なくともヒドロキシル基、カルボキシル基、スルホン酸基、アミノ基等の官能基をその分子構造中に含有している事が必要であり、多価カルボジイミド樹脂との反応性を考慮してカルボキシル基を含有している事がより望ましい。  The thermoplastic resin used for the receiving layer exhibits excellent performance by being cross-linked with a polyvalent carbodiimide resin. Therefore, the content of the thermoplastic resin is not limited, but it is necessary to contain at least a functional group such as hydroxyl group, carboxyl group, sulfonic acid group, amino group in the molecular structure. It is more desirable to contain a carboxyl group in consideration of reactivity with the resin.

本発明者は各種原料を精査した結果、上記のような受容層に使用される熱可塑性樹脂として好ましい熱可塑性樹脂としては、アクリル系樹脂、ポリエステル系樹脂、ポリウレタン系樹脂、ポリビニル系樹脂、エポキシ系樹脂など広範囲から選択可能であるが、基材との接着性や印字画像転写均一性などの点からポリエステル系樹脂を用いることがより好ましい事を見出した。また、熱可塑性樹脂には、無機または有機のフィラー、分散剤、紫外線吸収剤、滑剤などの添加剤が必要に応じて添加される。  As a result of scrutinizing various raw materials, the present inventor has preferred acrylic resins, such as acrylic resins, polyester resins, polyurethane resins, polyvinyl resins, epoxy resins, as thermoplastic resins used in the receiving layer as described above. Although it can be selected from a wide range of resins and the like, it has been found that it is more preferable to use a polyester-based resin from the viewpoints of adhesion to a base material and printed image transfer uniformity. Further, additives such as inorganic or organic fillers, dispersants, ultraviolet absorbers, lubricants and the like are added to the thermoplastic resin as necessary.

なお本発明におけるポリエステル系樹脂としては、ポリエチレンテレフタレート樹脂、ポリブチレンテレフタレート樹脂、ポリシクロヘキシレンジメチレンテレフタレート樹脂、ポリエチレンナフタレート樹脂等の各種ホモポリマー及びそれらの共重合体、各種共重合ポリエステル樹脂、各種変性ポリエステル樹脂、各種変性共重合ポリエステル樹脂、及び各種ポリエステル系エラストマーなどがあげられ、そのうち少なくとも1種類もしくは2種類以上の混合物のいずれかを本発明で使用する。  The polyester resin in the present invention includes various homopolymers such as polyethylene terephthalate resin, polybutylene terephthalate resin, polycyclohexylene dimethylene terephthalate resin, polyethylene naphthalate resin, copolymers thereof, various copolyester resins, and various types. Examples thereof include modified polyester resins, various modified copolyester resins, and various polyester-based elastomers. Among them, at least one kind or a mixture of two or more kinds is used in the present invention.

受容層に使用されるポリエステル系樹脂のガラス転移点は−30℃〜60℃の範囲が望ましく、さらに−20〜50℃の範囲である事がより望ましい。ガラス転移点が−30℃未満になると熱転写受容シートを高温雰囲気中で保存した場合にブロッキングが発生しやすくなり、逆にガラス転移点が60℃を超える樹脂を使用すると、樹脂基材と受容層の間の密着強度が低下する事によって熱転写受容シートの耐アルコール性も低下する。  The glass transition point of the polyester-based resin used for the receiving layer is desirably in the range of -30 ° C to 60 ° C, and more desirably in the range of -20 to 50 ° C. When the glass transition point is less than −30 ° C., blocking tends to occur when the thermal transfer receiving sheet is stored in a high temperature atmosphere. Conversely, when a resin having a glass transition point exceeding 60 ° C. is used, the resin base material and the receiving layer are used. As the adhesion strength between the two decreases, the alcohol resistance of the thermal transfer receiving sheet also decreases.

受容層に使用されるポリエステル系樹脂の数平均分子量は、特に限定されないが架橋剤との反応性や塗料にする際の扱い易さの観点から3000〜50000の範囲が望ましく、さらに5000〜35000の範囲が望ましい。数平均分子量が3000未満であると耐アルコール性及び機械的強度が乏しく、逆に50000を超えると架橋剤との反応性に劣る為に受容層の耐アルコール性及び樹脂基材との間の密着強度が低下する。  The number average molecular weight of the polyester-based resin used in the receiving layer is not particularly limited, but is preferably in the range of 3000 to 50000 from the viewpoint of reactivity with the cross-linking agent and ease of handling in coating, and further 5000 to 35000. A range is desirable. If the number average molecular weight is less than 3,000, the alcohol resistance and mechanical strength are poor, and if it exceeds 50,000, the reactivity with the cross-linking agent is poor. Strength decreases.

受容層に添加されるポリエステル系樹脂と多価カルボジイミド樹脂の割合は、重量比でポリエステル系樹脂/多価カルボジイミド樹脂=100/1〜10/3の範囲が好ましく、100/5〜100/25であればより好ましい。多価カルボジイミド樹脂の添加量が100/1より少なくなると架橋が不充分になり、耐アルコール性が低下し、樹脂基材と受容層との間の密着強度も向上しない。逆に多価カルボジイミド樹脂の添加量が10/3より多くなると、架橋に使われずに余った多価カルボジイミド樹脂が原因で受容層の耐アルコール性が低下する傾向がある。  The ratio of the polyester resin and the polyvalent carbodiimide resin added to the receiving layer is preferably in the range of polyester resin / polyvalent carbodiimide resin = 100/1 to 10/3 in terms of weight ratio, and is 100/5 to 100/25. More preferably. When the addition amount of the polyvalent carbodiimide resin is less than 100/1, the crosslinking is insufficient, the alcohol resistance is lowered, and the adhesion strength between the resin substrate and the receiving layer is not improved. On the contrary, when the addition amount of the polyvalent carbodiimide resin is more than 10/3, the alcohol resistance of the receiving layer tends to decrease due to the remaining polyvalent carbodiimide resin not used for crosslinking.

受容層はさらに耐ブロッキング性向上の為に疎水性シリカを含有する。疎水性シリカは、低吸湿性や良好な塗料分散性や各種溶媒に対して塗料粘度を低く維持でき、本発明の受容層用塗料において親水性シリカに比べて少量の添加で耐ブロッキング性を向上できるという優れた性能を発揮する。疎水性シリカの種類は特に限定されず、受容層用塗料に使用する樹脂や溶媒に応じて適宜選択すれば良い。  The receiving layer further contains hydrophobic silica to improve blocking resistance. Hydrophobic silica can maintain low moisture absorption, good paint dispersibility, and low paint viscosity against various solvents, and improves blocking resistance with a small amount of addition to hydrophilic silica in the coating for receiving layers of the present invention. Demonstrates excellent performance. The kind of hydrophobic silica is not particularly limited, and may be appropriately selected according to the resin or solvent used for the coating for the receiving layer.

疎水性シリカの添加量は受容層全体の5〜15重量%の範囲で含有している事が好ましい。疎水性シリカの添加量が受容層全体の5重量%より少ないと充分な耐ブロッキング性能を付与する事が出来ず、逆に15重量%を超えると耐アルコール性が悪くなるので好ましくない。  The amount of hydrophobic silica added is preferably in the range of 5 to 15% by weight of the entire receiving layer. If the amount of the hydrophobic silica added is less than 5% by weight of the entire receiving layer, sufficient blocking resistance cannot be imparted. Conversely, if it exceeds 15% by weight, the alcohol resistance deteriorates.

受容層に使用する疎水性シリカの平均粒子径は特に限定されず、5nm〜10μmの範囲から用途や求める性能に応じて適宜選択すればよいが、より好ましくは0.1〜5μmの範囲から使用される事が好ましい。平均粒子径が5nm未満だと、耐ブロッキング性能を満たすためにシリカを受容層に多量に添加する必要があり、その結果として耐アルコール性が低下してしまう、逆に10μmを超えると受容層表面の平滑性が損なわれ、印字画像転写均一性が低下する。なお本発明における平均粒子径とは、レーザー回折・散乱法によって求めた粒度分布における積算値50%での粒径を意味する。  The average particle size of the hydrophobic silica used for the receiving layer is not particularly limited, and may be appropriately selected from the range of 5 nm to 10 μm according to the application and desired performance, but more preferably from the range of 0.1 to 5 μm. It is preferable to be done. If the average particle size is less than 5 nm, it is necessary to add a large amount of silica to the receptor layer in order to satisfy the blocking resistance. As a result, the alcohol resistance is lowered. The smoothness of the image is impaired, and the printed image transfer uniformity decreases. In addition, the average particle diameter in the present invention means a particle diameter at an integrated value of 50% in a particle size distribution obtained by a laser diffraction / scattering method.

受容層には上記した主成分以外に、耐ブロッキング性や印字画像転写均一性を向上させるためにガラス転移点が70〜120℃の範囲のポリエステル系樹脂を添加してもよい。前記ポリエステル樹脂を添加させれば耐ブロッキング性は向上するが、逆に受容層と樹脂基材との密着強度が低下し、結果的に耐アルコール性が低下する。添加量は受容層成分中の1〜50重量%の範囲から状況に応じて適宜添加量を決める事が望ましく、添加量が受容層成分中の1重量%未満の時は耐ブロッキング性能を向上させる事が出来ず、逆に添加量が受容層成分中の50重量%を超えると密着強度及び耐アルコール性が大幅に低下する。  In addition to the main components described above, a polyester resin having a glass transition point in the range of 70 to 120 ° C. may be added to the receptor layer in order to improve blocking resistance and print image transfer uniformity. If the polyester resin is added, the blocking resistance is improved, but conversely, the adhesion strength between the receiving layer and the resin substrate is lowered, and as a result, the alcohol resistance is lowered. It is desirable that the addition amount is appropriately determined depending on the situation from the range of 1 to 50% by weight in the receiving layer component. When the addition amount is less than 1% by weight in the receiving layer component, the anti-blocking performance is improved. On the contrary, if the addition amount exceeds 50% by weight in the receiving layer component, the adhesion strength and the alcohol resistance are greatly reduced.

受容層にはポリエステル系樹脂と多価カルボジイミド樹脂の反応をさらに促進させる為にアミンを添加する事が望ましい。アミンは多価カルボジイミド樹脂がポリエステル系樹脂に含まれる官能基と反応する際の触媒として機能する。アミンを添加する事によって、架橋反応が促進されやすくなり、アンダー層の耐アルコール性や受容層や樹脂基材との密着強度などが向上する。アンダー層に添加されるアミンの種別は特に限定されず用途や反応樹脂の性状に合わせて適宜選択すれば良いが、第三級アミン及び脂肪族、環状脂肪族、芳香族、芳香族脂肪族または複素環式の第三級ポリアミン等の第三級アミン類から選択し添加する事がより望ましい。  It is desirable to add an amine to the receptor layer in order to further accelerate the reaction between the polyester resin and the polyvalent carbodiimide resin. The amine functions as a catalyst when the polyvalent carbodiimide resin reacts with a functional group contained in the polyester resin. By adding an amine, the crosslinking reaction is easily promoted, and the alcohol resistance of the under layer and the adhesion strength with the receiving layer and the resin substrate are improved. The type of amine added to the under layer is not particularly limited and may be appropriately selected according to the use and properties of the reaction resin, but tertiary amine and aliphatic, cycloaliphatic, aromatic, aromatic aliphatic or It is more desirable to select and add from tertiary amines such as heterocyclic tertiary polyamines.

受容層に使用するアミンの添加量は特に限定はされないが、重量比でポリエステル系樹脂/アミン=100/0.5〜100/15の範囲が好ましく、さらに100/1〜100/10がより好ましい。アミンの添加量が100/0.5より少ないと触媒としての効果が乏しく、逆に添加量が100/15より多いと残留したアミンによって受容層の耐アルコール性が低下する。  The amount of amine added to the receptor layer is not particularly limited, but is preferably in the range of polyester resin / amine = 100 / 0.5 to 100/15 by weight ratio, more preferably 100/1 to 100/10. . If the addition amount of the amine is less than 100 / 0.5, the effect as a catalyst is poor. Conversely, if the addition amount is more than 100/15, the remaining amine lowers the alcohol resistance of the receiving layer.

次に実施例を挙げて本発明について具体的に説明する。なお実施例中で示す部は全て重量基準であり、ガラス転移点の表記は「Tg」と省略する。  Next, an example is given and the present invention is explained concretely. All parts shown in the examples are based on weight, and the glass transition point is abbreviated as “Tg”.

厚み100μmのポリプロピレン樹脂からなる樹脂基材の上に下記受容層用塗料を乾燥重量が1g/mとなるように塗布し、乾燥させて受容層を形成した。
(受容層用塗料1)
・ポリエステル系樹脂水溶液(固形分35%、Tg50℃) 67.14部
・多価カルボジイミド樹脂水溶液(固形分40%) 0.63部
・疎水性シリカ(富士シリシア化学(株)製サイロホービック(登録商標)100、平均粒子径2.7μm) 1.25部
・IPA 30.98部
The following receiving layer coating material was applied on a resin substrate made of polypropylene resin having a thickness of 100 μm so that the dry weight was 1 g / m 2 and dried to form a receiving layer.
(Receptive layer coating 1)
・ Polyester resin aqueous solution (solid content 35%, Tg 50 ° C.) 67.14 parts ・ Polyvalent carbodiimide resin aqueous solution (solid content 40%) 0.63 parts ・ Hydrophobic silica (Silo Hovic manufactured by Fuji Silysia Chemical Co., Ltd.) (Registered trademark) 100, average particle size 2.7 μm) 1.25 parts IPA 30.98 parts

実施例1と同じ樹脂基材の上に下記受容層用塗料を乾燥重量が1g/mとなるように塗布し、乾燥させて受容層を形成した。
(受容層用塗料2)
・ポリエステル系樹脂水溶液(固形分35%、Tg50℃) 52.86部
・多価カルボジイミド樹脂水溶液(固形分40%) 13.13部
・疎水性シリカ(富士シリシア化学(株)製サイロホービック100) 1.25部
・IPA 32.76部
On the same resin substrate as in Example 1, the following receiving layer coating material was applied so that the dry weight was 1 g / m 2 and dried to form a receiving layer.
(Receptive layer paint 2)
・ Polyester resin aqueous solution (solid content 35%, Tg 50 ° C.) 52.86 parts ・ Polyvalent carbodiimide resin aqueous solution (solid content 40%) 13.13 parts ・ Hydrophobic silica (Silo Hovic 100 manufactured by Fuji Silysia Chemical Ltd.) ) 1.25 parts ・ IPA 32.76 parts

実施例1と同じ樹脂基材の上に下記受容層用塗料を乾燥重量が1g/mとなるように塗布し、乾燥させて受容層を形成した。
(受容層用塗料3)
・ポリエステル系樹脂水溶液(固形分35%、Tg50℃) 60.00部
・多価カルボジイミド樹脂水溶液(固形分40%) 0.63部
・疎水性シリカ(富士シリシア化学(株)製サイロホービック100) 3.75部
・IPA 35.62部
On the same resin substrate as in Example 1, the following receiving layer coating material was applied so that the dry weight was 1 g / m 2 and dried to form a receiving layer.
(Receptive layer coating 3)
Polyester resin aqueous solution (solid content 35%, Tg 50 ° C.) 60.00 parts Polyvalent carbodiimide resin aqueous solution (solid content 40%) 0.63 parts Hydrophobic silica (Silo Hovic 100 manufactured by Fuji Silysia Chemical Ltd.) 3.75 parts / IPA 35.62 parts

実施例1と同じ樹脂基材の上に下記受容層用塗料を乾燥重量が1g/mとなるように塗布し、乾燥させて受容層を形成した。
(受容層用塗料4)
・ポリエステル系樹脂水溶液(固形分35%、Tg50℃) 47.14部
・多価カルボジイミド樹脂水溶液(固形分40%) 11.88部
・疎水性シリカ(富士シリシア化学(株)製サイロホービック100) 3.75部
・IPA 37.23部
On the same resin substrate as in Example 1, the following receiving layer coating material was applied so that the dry weight was 1 g / m 2 and dried to form a receiving layer.
(Receptive layer coating 4)
Polyester resin aqueous solution (solid content 35%, Tg 50 ° C.) 47.14 parts Polyvalent carbodiimide resin aqueous solution (solid content 40%) 11.88 parts Hydrophobic silica (Silo Hovic 100 manufactured by Fuji Silysia Chemical Ltd.) 3.75 parts / IPA 37.23 parts

実施例1と同じ樹脂基材の上に下記受容層用塗料を乾燥重量が1g/mとなるように塗布し、乾燥させて受容層を形成した。
(受容層用塗料5)
・ポリエステル系樹脂水溶液(固形分35%、Tg50℃) 55.90部
・多価カルボジイミド樹脂水溶液(固形分40%) 7.34部
・疎水性シリカ(富士シリシア化学(株)製サイロホービック100) 2.50部
・IPA 34.26部
On the same resin substrate as in Example 1, the following receiving layer coating material was applied so that the dry weight was 1 g / m 2 and dried to form a receiving layer.
(Receptive layer coating 5)
Polyester resin aqueous solution (solid content 35%, Tg 50 ° C.) 55.90 parts Polyvalent carbodiimide resin aqueous solution (solid content 40%) 7.34 parts Hydrophobic silica (Silo Hovic 100 manufactured by Fuji Silysia Chemical Co., Ltd.) ) 2.50 parts ・ IPA 34.26 parts

実施例1と同じ樹脂基材の上に下記受容層用塗料を乾燥重量が1g/mとなるように塗布し、乾燥させて受容層を形成した。
(受容層用塗料6)
・ポリエステル系樹脂水溶液(固形分35%、Tg50℃) 55.90部
・多価カルボジイミド樹脂水溶液(固形分40%) 7.34部
・疎水性シリカ(富士シリシア化学(株)製サイロホービック200、平均粒子径3.9μm) 2.50部
・IPA 34.26部
On the same resin substrate as in Example 1, the following receiving layer coating material was applied so that the dry weight was 1 g / m 2 and dried to form a receiving layer.
(Receptive layer coating 6)
-Polyester resin aqueous solution (solid content 35%, Tg 50 ° C) 55.90 parts-Polyvalent carbodiimide resin aqueous solution (solid content 40%) 7.34 parts-Hydrophobic silica (Silo Hovic 200 manufactured by Fuji Silysia Chemical Co., Ltd.) , Average particle diameter 3.9 μm) 2.50 parts IPA 34.26 parts

実施例1と同じ樹脂基材の上に下記受容層用塗料を乾燥重量が1g/mとなるように塗布し、乾燥させて受容層を形成した。
(受容層用塗料7)
・ポリエステル系樹脂水溶液(固形分25%、Tg−20℃) 94.00部
・多価カルボジイミド樹脂水溶液(固形分40%) 0.63部
・疎水性シリカ(富士シリシア化学(株)製サイロホービック100) 1.25部
・IPA 4.12部
On the same resin substrate as in Example 1, the following receiving layer coating material was applied so that the dry weight was 1 g / m 2 and dried to form a receiving layer.
(Receptive layer coating 7)
・ Polyester resin aqueous solution (solid content 25%, Tg−20 ° C.) 94.00 parts ・ Polyvalent carbodiimide resin aqueous solution (solid content 40%) 0.63 parts ・ Hydrophobic silica (Silo Ho manufactured by Fuji Silysia Chemical Co., Ltd.) Big 100) 1.25 parts IPA 4.12 parts

実施例1と同じ樹脂基材の上に下記受容層用塗料を乾燥重量が1g/mとなるように塗布し、乾燥させて受容層を形成した。
(受容層用塗料8)
・ポリエステル系樹脂水溶液(固形分25%、Tg−20℃) 74.00部
・多価カルボジイミド樹脂水溶液(固形分40%) 13.13部
・疎水性シリカ(富士シリシア化学(株)製サイロホービック10) 1.25部
・IPA 11.62部
On the same resin substrate as in Example 1, the following receiving layer coating material was applied so that the dry weight was 1 g / m 2 and dried to form a receiving layer.
(Receptive layer coating 8)
・ Polyester resin aqueous solution (solid content 25%, Tg-20 ° C.) 74.00 parts ・ Polyvalent carbodiimide resin aqueous solution (solid content 40%) 13.13 parts ・ Hydrophobic silica (Silo Ho from Fuji Silysia Chemical Co., Ltd.) Big 10) 1.25 parts ・ IPA 11.62 parts

実施例1と同じ樹脂基材の上に下記受容層用塗料を乾燥重量が1g/mとなるように塗布し、乾燥させて受容層を形成した。
(受容層用塗料9)
・ポリエステル系樹脂水溶液(固形分35%、Tg50℃) 50.26部
・多価カルボジイミド樹脂水溶液(固形分40%) 15.39部
・疎水性シリカ(富士シリシア化学(株)製サイロホービック100) 1.25部
・IPA 33.10部
On the same resin substrate as in Example 1, the following receiving layer coating material was applied so that the dry weight was 1 g / m 2 and dried to form a receiving layer.
(Receptive layer coating 9)
Polyester resin aqueous solution (solid content 35%, Tg 50 ° C.) 50.26 parts Polyvalent carbodiimide resin aqueous solution (solid content 40%) 15.39 parts Hydrophobic silica (Silo Hovic 100 manufactured by Fuji Silysia Chemical Ltd.) ) 1.25 parts ・ IPA 33.10 parts

実施例1と同じ樹脂基材の上に下記受容層用塗料を乾燥重量が1g/mとなるように塗布し、乾燥させて受容層を形成した。
(受容層用塗料10)
・ポリエステル系樹脂水溶液(固形分35%、Tg50℃) 67.70部
・多価カルボジイミド樹脂水溶液(固形分40%) 0.30部
・疎水性シリカ(富士シリシア化学(株)製サイロホービック100) 1.18部
・IPA 30.82部
On the same resin substrate as in Example 1, the following receiving layer coating material was applied so that the dry weight was 1 g / m 2 and dried to form a receiving layer.
(Receptive layer coating 10)
Polyester resin aqueous solution (solid content 35%, Tg 50 ° C.) 67.70 parts Polyvalent carbodiimide resin aqueous solution (solid content 40%) 0.30 parts Hydrophobic silica (Silo Hovic 100 manufactured by Fuji Silysia Chemical Ltd.) ) 1.18 parts IPA 30.82 parts

実施例1と同じ樹脂基材の上に下記受容層用塗料を乾燥重量が1g/mとなるように塗布し、乾燥させて受容層を形成した。
(受容層用塗料11)
・ポリエステル系樹脂水溶液(固形分35%、Tg50℃) 66.10部
・多価カルボジイミド樹脂水溶液(固形分40%) 0.29部
・疎水性シリカ(富士シリシア化学(株)製サイロホービック100) 1.25部
・トリエチルアミン 0.50部
・IPA 31.86部
On the same resin substrate as in Example 1, the following receiving layer coating material was applied so that the dry weight was 1 g / m 2 and dried to form a receiving layer.
(Receptive layer coating 11)
-Polyester resin aqueous solution (solid content 35%, Tg 50 ° C) 66.10 parts-Polyvalent carbodiimide resin aqueous solution (solid content 40%) 0.29 parts-Hydrophobic silica (Silo Hovic 100 manufactured by Fuji Silysia Chemical Ltd.) ) 1.25 parts · Triethylamine 0.50 parts · IPA 31.86 parts

実施例1と同じ樹脂基材の上に下記受容層用塗料を乾燥重量が1g/mとなるように塗布し、乾燥させて受容層を形成した。
(受容層用塗料12)
・ポリエステル系樹脂水溶液(固形分35%、Tg50℃) 51.61部
・多価カルボジイミド樹脂水溶液(固形分40%) 12.97部
・疎水性シリカ(富士シリシア化学(株)製サイロホービック100) 1.25部
・トリエチルアミン 0.50部
・IPA 33.67部
On the same resin substrate as in Example 1, the following receiving layer coating material was applied so that the dry weight was 1 g / m 2 and dried to form a receiving layer.
(Receptive layer coating 12)
Polyester resin aqueous solution (solid content 35%, Tg 50 ° C.) 51.61 parts Polyvalent carbodiimide resin aqueous solution (solid content 40%) 12.97 parts Hydrophobic silica (Silo Hovic 100 manufactured by Fuji Silysia Chemical Ltd.) ) 1.25 parts · Triethylamine 0.50 parts · IPA 33.67 parts

<比較例1>
実施例1と同じ樹脂基材の上に下記受容層用塗料を乾燥重量が1g/mとなるように塗布し、乾燥させて受容層を形成した。
(受容層用塗料13)
・ポリエステル系樹脂水溶液(固形分35%、Tg50℃) 71.43部
・IPA 28.57部
<Comparative Example 1>
On the same resin substrate as in Example 1, the following receiving layer coating material was applied so that the dry weight was 1 g / m 2 and dried to form a receiving layer.
(Receptive layer coating 13)
・ Polyester resin aqueous solution (solid content 35%, Tg 50 ° C.) 71.43 parts ・ IPA 28.57 parts

<比較例2>
実施例1と同じ樹脂基材の上に下記受容層用塗料を乾燥重量が1g/mとなるように塗布し、乾燥させて受容層を形成した。
(受容層用塗料14)
・ポリエステル系樹脂水溶液(固形分35%、Tg50℃) 60.71部
・疎水性シリカ(富士シリシア化学(株)製サイロホービック100) 3.75部
・IPA 35.54部
<Comparative example 2>
On the same resin substrate as in Example 1, the following receiving layer coating material was applied so that the dry weight was 1 g / m 2 and dried to form a receiving layer.
(Receptive layer coating 14)
Polyester resin aqueous solution (solid content 35%, Tg 50 ° C.) 60.71 parts Hydrophobic silica (Sirohovic 100 manufactured by Fuji Silysia Chemical Ltd.) 3.75 parts IPA 35.54 parts

<比較例3>
実施例1と同じ樹脂基材の上に下記受容層用塗料を乾燥重量が1g/mとなるように塗布し、乾燥させて受容層を形成した。
(受容層用塗料15)
・ポリエステル系樹脂水溶液(固形分35%、Tg50℃) 55.00部
・多価カルボジイミド樹脂水溶液(固形分40%) 14.38部
・IPA 30.62部
<Comparative Example 3>
On the same resin substrate as in Example 1, the following receiving layer coating material was applied so that the dry weight was 1 g / m 2 and dried to form a receiving layer.
(Receptive layer coating 15)
・ Polyester resin aqueous solution (solid content 35%, Tg 50 ° C.) 55.00 parts ・ Polyvalent carbodiimide resin aqueous solution (solid content 40%) 14.38 parts ・ IPA 30.62 parts

<比較例4>
実施例1と同じ樹脂基材の上に下記受容層用塗料を乾燥重量が1g/mとなるように塗布し、乾燥させて受容層を形成した。
(受容層用塗料16)
・ポリエステル系樹脂水溶液(固形分35%、Tg50℃) 52.86部
・多価カルボジイミド樹脂水溶液(固形分40%) 13.13部
・親水性シリカ(富士シリシア化学(株)製サイリシア(商標登録)350、平均粒子径3.9μm) 1.25部
・IPA 32.76部
<Comparative Example 4>
On the same resin substrate as in Example 1, the following receiving layer coating material was applied so that the dry weight was 1 g / m 2 and dried to form a receiving layer.
(Receptive layer coating 16)
・ Polyester resin aqueous solution (solid content 35%, Tg 50 ° C.) 52.86 parts ・ Polyvalent carbodiimide resin aqueous solution (solid content 40%) 13.13 parts ・ Hydrophilic silica (Fuji Silysia Chemical Co., Ltd. ) 350, average particle size 3.9 μm) 1.25 parts IPA 32.76 parts

<比較例5>
実施例1と同じ樹脂基材の上に下記受容層用塗料を乾燥重量が1g/mとなるように塗布し、乾燥させて受容層を形成した。
(受容層用塗料17)
・ポリエステル系樹脂水溶液(固形分35%、Tg50℃) 55.90部
・多価カルボジイミド樹脂水溶液(固形分40%) 7.34部
・親水性シリカ(富士シリシア化学(株)製サイリシア350、平均粒子径3.9μm) 2.50部
・IPA 34.26部
<Comparative Example 5>
On the same resin substrate as in Example 1, the following receiving layer coating material was applied so that the dry weight was 1 g / m 2 and dried to form a receiving layer.
(Receptive layer coating 17)
・ Polyester resin aqueous solution (solid content 35%, Tg 50 ° C.) 55.90 parts ・ Polyvalent carbodiimide resin aqueous solution (solid content 40%) 7.34 parts ・ Hydrophilic silica (Silicia 350 manufactured by Fuji Silysia Chemical Ltd., average) (Particle size 3.9 μm) 2.50 parts / IPA 34.26 parts

<比較例6>
実施例1と同じ樹脂基材の上に下記受容層用塗料を乾燥重量が1g/mとなるように塗布し、乾燥させて受容層を形成した。
(受容層用塗料18)
・ポリエステル系樹脂水溶液(固形分30%、Tg80℃) 55.00部
・多価カルボジイミド樹脂水溶液(固形分40%) 11.88部
・疎水性シリカ(富士シリシア化学(株)製サイロホービック100) 3.75部
・IPA 29.37部
<Comparative Example 6>
On the same resin substrate as in Example 1, the following receiving layer coating material was applied so that the dry weight was 1 g / m 2 and dried to form a receiving layer.
(Receptive layer coating 18)
Polyester resin aqueous solution (solid content 30%, Tg 80 ° C.) 55.00 parts Polyvalent carbodiimide resin aqueous solution (solid content 40%) 11.88 parts Hydrophobic silica (Silo Hovic 100 manufactured by Fuji Silysia Chemical Co., Ltd.) 3.75 parts / IPA 29.37 parts

<比較例7>
実施例1と同じ樹脂基材の上に下記受容層用塗料を乾燥重量が1g/mとなるように塗布し、乾燥させて受容層を形成した。
(受容層用塗料19)
・酸変性ポリオレフィン樹脂水溶液(固形分25%,融点83℃) 66.00部
・多価カルボジイミド樹脂水溶液(固形分40%) 11.88部
・疎水性シリカ(富士シリシア化学(株)製サイロホービック100) 3.75部
・IPA 18.37部
<Comparative Example 7>
On the same resin substrate as in Example 1, the following receiving layer coating material was applied so that the dry weight was 1 g / m 2 and dried to form a receiving layer.
(Receptive layer coating 19)
-Acid-modified polyolefin resin aqueous solution (solid content 25%, melting point 83 ° C) 66.00 parts-Polyvalent carbodiimide resin aqueous solution (solid content 40%) 11.88 parts-Hydrophobic silica (Silo Ho manufactured by Fuji Silysia Chemical Co., Ltd.) Big 100) 3.75 parts, IPA 18.37 parts

以上のようにして作製した実施例および比較例の熱転写受容シートについて、次の試験条件により印字画像転写均一性、耐ブロッキング性、耐擦過性、耐アルコール性(耐アルコール拭取り性及び耐アルコール浸漬性)の評価を行った。  For the thermal transfer receiving sheets of Examples and Comparative Examples prepared as described above, printed image transfer uniformity, blocking resistance, scratch resistance, and alcohol resistance (alcohol resistance wiping resistance and alcohol immersion resistance) according to the following test conditions Evaluation).

<印字画像均一性試験>
プリンタ:SATO株式会社製 MR410e
熱転写インクシート:ダイニック株式会社製 HL45
印字速度:50mm/sec
印字濃度:4/5
評価基準:
○:ボイド・カスレが全く無く外観品位に優れ均一な印字画像である。
△:ボイド・カスレがほぼ無くほぼ均一な印字画像である。
×:ボイド・カスレがあり印字画像の濃度にバラツキがある。
<Printed image uniformity test>
Printer: MR410e manufactured by SATO Corporation
Thermal transfer ink sheet: HL45 manufactured by Dynic Co., Ltd.
Printing speed: 50mm / sec
Print density: 4/5
Evaluation criteria:
◯: There is no voids or blurs, and the printed image is excellent in appearance quality and uniform.
(Triangle | delta): It is a substantially uniform printed image with almost no void and blur.
X: There are voids and blurs, and the density of the printed image varies.

<耐ブロッキング性試験>
受容層の表面と表面を重ね合わせて、1.0kg/cm2の圧力をかけた状態で60℃環境下に72時間放置した後、重ね合わせ面を指で剥がし、ブロッキング状態を観察した。評価基準:
○:剥がすときに剥離音がなくブロッキングも見られない。
△:剥がす時に少し剥離音があるが、ブロッキングは見られない。
×:剥がすときに面同士がくっついてうまく剥れずブロッキングしている。
<Blocking resistance test>
The surface of the receptor layer was overlaid and left under a pressure of 1.0 kg / cm 2 in a 60 ° C. environment for 72 hours, and then the overlaid surface was peeled off with a finger and the blocking state was observed. Evaluation criteria:
○: No peeling sound and no blocking observed when peeling.
Δ: There is a slight peeling noise when peeling, but no blocking is seen.
X: The surfaces are stuck to each other when peeled, and are not peeled off and are blocked.

<耐擦過性試験>
試験機:学振型試験機(JISL0849の摩擦試験機II形)
条件:500g荷重・50往復
摩擦体:上質紙
評価基準:
○:印字画像部に全く損傷がなく、非印字部分にも全く汚れがない。
△:印字画像部にほぼ損傷がなく画像は判読可能、非印字部分に僅かに汚れがある。
×:印字画像部に損傷があり画像が判読できず、非印字部分にも汚れがある。
<Abrasion resistance test>
Testing machine: Gakushin type testing machine (JISL0849 friction testing machine type II)
Conditions: 500 g load, 50 reciprocating friction body: Quality paper Evaluation criteria:
◯: There is no damage on the printed image area, and there is no stain on the non-printed area.
(Triangle | delta): A printed image part has almost no damage, an image can be read, and a non-printing part has a stain | pollution | contamination slightly.
X: The printed image portion is damaged, the image cannot be read, and the non-printed portion is also dirty.

<塗工適性試験>
条件:直径0.1mmのワイヤバーを用いて塗料をPP樹脂基材の上に塗工
評価基準:
○:塗工時の塗料の粘度が低く、塗工面に全くムラが無く非常に平滑である。
△:塗工時の塗料の粘度がやや高いが、塗工面はほぼ平滑である。
×:塗工時の塗料の粘度が高く、塗工面にスジ状のムラがある。
<Coating suitability test>
Conditions: Coating standard on a PP resin substrate using a wire bar having a diameter of 0.1 mm Evaluation criteria:
◯: The viscosity of the paint at the time of coating is low, and the coated surface is completely smooth and very smooth.
(Triangle | delta): Although the viscosity of the coating material at the time of coating is a little high, the coating surface is substantially smooth.
X: The viscosity of the coating material at the time of coating is high, and there are streaky irregularities on the coated surface.

<耐アルコール拭き取り性試験(短時間の耐アルコール性能)>
試験機:学振型試験機(JISL0849の摩擦試験機II形)
条件:500g荷重・30往復
摩擦体:綿布(金巾3号)にイソプロピルアルコールを含浸
評価基準:
○:印字画像部に全く損傷がなく、受容層に剥れや汚れが全くない。
△:印字画像部が僅かに損傷し、受容層に剥がれや汚れが僅かに見られる。
×:印字画像の損傷が激しいとともに、受容層に剥れが見られる。
<Alcohol resistance wiping test (short-time alcohol resistance)>
Testing machine: Gakushin type testing machine (JISL0849 friction testing machine type II)
Conditions: 500 g load, 30 reciprocating friction body: Cotton cloth (gold width 3) impregnated with isopropyl alcohol Evaluation criteria:
○: The printed image area is not damaged at all, and the receiving layer is not peeled off or stained.
Δ: Printed image portion is slightly damaged, and peeling or dirt is slightly seen on the receiving layer.
X: The printed image is severely damaged, and the receiving layer is peeled off.

<耐アルコール浸漬性試験(長時間の耐アルコール性能)>
試験機:学振型試験機(JIS L0849の摩擦試験機II形)
条件:ラベルを95%エタノール中に1時間浸漬後、500g荷重・30往復
摩擦体:綿布(金巾3号)
評価基準:
○:印字画像部に全く損傷がなく、受容層に剥れや汚れが全くない。
△:印字画像部が僅かに損傷し、受容層に剥がれや汚れが僅かに見られる。
×:印字画像の損傷が激しいとともに、受容層に剥れが見られる。
<Alcohol resistance test (long-time alcohol resistance)>
Testing machine: Gakushin type testing machine (JIS L0849 friction tester type II)
Conditions: After immersing the label in 95% ethanol for 1 hour, 500 g load, 30 reciprocating friction body: cotton cloth (gold width 3)
Evaluation criteria:
○: The printed image area is not damaged at all, and the receiving layer is not peeled off or stained.
Δ: Printed image portion is slightly damaged, and peeling or dirt is slightly seen on the receiving layer.
X: The printed image is severely damaged, and the receiving layer is peeled off.

実施例及び比較例によって作成した熱転写受容シートを前述した評価方法に基づいて、印字画像転写均一性、耐ブロッキング性、耐擦過性、耐アルコール拭き取り性、耐アルコール浸漬性について評価を行った結果を下記表1に示す。  Based on the evaluation methods described above for the thermal transfer receiving sheets prepared in Examples and Comparative Examples, the results of evaluation of printed image transfer uniformity, blocking resistance, scratch resistance, alcohol wiping resistance, and alcohol immersion resistance were evaluated. Shown in Table 1 below.

Figure 2015009558
Figure 2015009558

表1の結果より分かるように、実施例1〜8及び実施例11と実施例12は全ての評価項目が良好であり、実施例9と実施例10は耐アルコール性がやや満足出来ないものの使用上の問題がないのに対して、比較例は少なくとも一つの評価項目の内容が悪く使用上の問題があった。比較例1は受容層に疎水性シリカを添加しなかった為に耐ブロッキング性が悪く、多価カルボジイミド樹脂を添加しなかった為に耐アルコール浸漬性が悪かった。比較例2は多価カルボジイミド樹脂を添加しなかった為に、耐アルコール浸漬性が悪かった。比較例3は受容層に疎水性シリカを全く添加しなかった為に耐ブロッキング性が悪かった。比較例4は疎水性シリカの代わりに親水性シリカを5%添加したところ、塗料粘度が高くなり塗工的性がやや満足出来ず、耐ブロッキング性も悪くなった。比較例5は疎水性シリカの代わりに親水性シリカを10%添加したところ、耐ブロッキング性は満足するようになったものの、塗料粘度が非常に高くなり塗工的性が悪化し、その結果として印字画像転写均一性がやや満足できないものとなった。比較例6は受容層に使用したポリエステル系樹脂のTgが本発明範囲より高かった為に、耐アルコール浸漬性が悪かった。比較例7は受容層にポリエステル系樹脂に替えて無水マレイン酸変性ポリオレフィン樹脂を使用した所、印字画像転写均一性や耐擦過性がやや満足できず、耐アルコール浸漬性が悪かった。  As can be seen from the results in Table 1, Examples 1 to 8 and Examples 11 and 12 are good in all evaluation items, and Examples 9 and 10 are used although alcohol resistance is somewhat unsatisfactory. In contrast to the above problem, the comparative example had a problem in use because the content of at least one evaluation item was poor. Comparative Example 1 had poor blocking resistance because no hydrophobic silica was added to the receiving layer, and poor alcohol immersion resistance because no polyvalent carbodiimide resin was added. Since Comparative Example 2 did not add a polyvalent carbodiimide resin, the alcohol immersion resistance was poor. Comparative Example 3 had poor blocking resistance because no hydrophobic silica was added to the receiving layer. In Comparative Example 4, when 5% of hydrophilic silica was added instead of hydrophobic silica, the viscosity of the coating became high, the coating property was not satisfactory, and the blocking resistance was also deteriorated. In Comparative Example 5, when 10% of hydrophilic silica was added instead of hydrophobic silica, the anti-blocking property was satisfied, but the coating viscosity became very high and the coating property deteriorated. The printed image transfer uniformity was somewhat unsatisfactory. In Comparative Example 6, since the Tg of the polyester resin used for the receiving layer was higher than the range of the present invention, the alcohol immersion resistance was poor. In Comparative Example 7, when a maleic anhydride-modified polyolefin resin was used in the receiving layer instead of the polyester-based resin, the printed image transfer uniformity and scratch resistance were somewhat unsatisfactory, and the alcohol immersion resistance was poor.

本発明の熱転写受容シートは、物流ラベルなどの一般的なラベル類や、会員カードやプリペイドカードなどのカード類などの用途で利用でき、特に非常に優れた耐アルコール性を必要とする食品分野及び薬事医療品分野のラベル及び可視化情報被印字用素材などに好適に利用出来る。  The thermal transfer receiving sheet of the present invention can be used in applications such as general labels such as logistics labels and cards such as membership cards and prepaid cards, and particularly in the food field that requires very good alcohol resistance and It can be suitably used for labels in the field of pharmaceutical and medical products and materials for printing visualization information.

1;樹脂基材
2;受容層
3;熱転写受容シート
1; resin base material 2; receiving layer 3; thermal transfer receiving sheet

Claims (5)

樹脂基材の一方の表面に受容層を1層だけ設けた熱転写受容シートであって、受容層がガラス転移点の範囲が−30〜60℃であるポリエステル系樹脂と多価カルボジイミド樹脂と疎水性シリカを主成分とする事を特徴とする熱転写受容シート。  A thermal transfer receiving sheet in which only one receiving layer is provided on one surface of a resin base material, and the receiving layer has a glass transition point range of -30 to 60 ° C., a polyester resin, a polyvalent carbodiimide resin, and a hydrophobic property A thermal transfer receiving sheet characterized by comprising silica as a main component. 受容層がポリエステル系樹脂と多価カルボジイミド樹脂とをポリエステル系樹脂/多価カルボジイミド樹脂=100/1〜10/3の重量比で含有している事を特徴とする請求項1に記載の熱転写受容シート。  2. The thermal transfer receptor according to claim 1, wherein the receptor layer contains a polyester resin and a polyvalent carbodiimide resin in a weight ratio of polyester resin / polyvalent carbodiimide resin = 100/1 to 10/3. Sheet. 受容層が疎水性シリカを受容層全体の5〜15重量%の範囲で含有している事を特徴とする請求項1及び2に記載の熱転写受容シート。  3. The thermal transfer receiving sheet according to claim 1, wherein the receiving layer contains hydrophobic silica in a range of 5 to 15% by weight of the entire receiving layer. 受容層がアミンを含有している事を特徴とする請求項1乃至3に記載の熱転写受容シート。  The thermal transfer receiving sheet according to claim 1, wherein the receiving layer contains an amine. 樹脂基材がポリプロピレン系樹脂からなる事を特徴とする請求項1乃至4に記載の熱転写受容シート。  The thermal transfer receiving sheet according to claim 1, wherein the resin base material is made of a polypropylene resin.
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Citations (11)

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Publication number Priority date Publication date Assignee Title
JPS6395990A (en) * 1986-10-13 1988-04-26 Nec Corp Thermal transfer recording material
JPH0881545A (en) * 1994-07-15 1996-03-26 Japan Synthetic Rubber Co Ltd Thermosetting resin composition
JPH10297117A (en) * 1997-04-25 1998-11-10 Bando Chem Ind Ltd White powder paint composition for heat-transfer image receiving sheet and heat-transfer image receiving sheet
JP2000025348A (en) * 1998-07-07 2000-01-25 Bando Chem Ind Ltd Powder mixture for image receiving sheet combinedly used for sublimation type dye thermal transfer and heat fusion type ink thermal transfer, and image receiving sheet thereof
JP2004106472A (en) * 2002-09-20 2004-04-08 Fuji Photo Film Co Ltd Multicolor imaging material and multicolor imaging method
JP2004204207A (en) * 2002-03-29 2004-07-22 Sanyo Chem Ind Ltd Dispersion of heat-crosslinkable resin
JP2006051749A (en) * 2004-08-16 2006-02-23 Teraoka Seisakusho:Kk Thermal transfer image receiving sheet
JP2006240182A (en) * 2005-03-04 2006-09-14 Ricoh Co Ltd Receptor for thermal transfer recording, method for manufacturing receptor, recording method using receptor and recording medium
JP2009057800A (en) * 2007-09-03 2009-03-19 Denso Corp Portable machine of electronic key system
JP2009166259A (en) * 2008-01-11 2009-07-30 Oji Paper Co Ltd Heat transfer receptive sheet
JP2009279797A (en) * 2008-05-20 2009-12-03 Dynic Corp Thermal transfer receptive sheet

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6395990A (en) * 1986-10-13 1988-04-26 Nec Corp Thermal transfer recording material
JPH0881545A (en) * 1994-07-15 1996-03-26 Japan Synthetic Rubber Co Ltd Thermosetting resin composition
JPH10297117A (en) * 1997-04-25 1998-11-10 Bando Chem Ind Ltd White powder paint composition for heat-transfer image receiving sheet and heat-transfer image receiving sheet
JP2000025348A (en) * 1998-07-07 2000-01-25 Bando Chem Ind Ltd Powder mixture for image receiving sheet combinedly used for sublimation type dye thermal transfer and heat fusion type ink thermal transfer, and image receiving sheet thereof
JP2004204207A (en) * 2002-03-29 2004-07-22 Sanyo Chem Ind Ltd Dispersion of heat-crosslinkable resin
JP2004106472A (en) * 2002-09-20 2004-04-08 Fuji Photo Film Co Ltd Multicolor imaging material and multicolor imaging method
JP2006051749A (en) * 2004-08-16 2006-02-23 Teraoka Seisakusho:Kk Thermal transfer image receiving sheet
JP2006240182A (en) * 2005-03-04 2006-09-14 Ricoh Co Ltd Receptor for thermal transfer recording, method for manufacturing receptor, recording method using receptor and recording medium
JP2009057800A (en) * 2007-09-03 2009-03-19 Denso Corp Portable machine of electronic key system
JP2009166259A (en) * 2008-01-11 2009-07-30 Oji Paper Co Ltd Heat transfer receptive sheet
JP2009279797A (en) * 2008-05-20 2009-12-03 Dynic Corp Thermal transfer receptive sheet

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