JPH0116678B2 - - Google Patents
Info
- Publication number
- JPH0116678B2 JPH0116678B2 JP54099596A JP9959679A JPH0116678B2 JP H0116678 B2 JPH0116678 B2 JP H0116678B2 JP 54099596 A JP54099596 A JP 54099596A JP 9959679 A JP9959679 A JP 9959679A JP H0116678 B2 JPH0116678 B2 JP H0116678B2
- Authority
- JP
- Japan
- Prior art keywords
- heat
- thermal
- color
- thermal printing
- recording material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000463 material Substances 0.000 claims description 30
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 22
- 150000001875 compounds Chemical class 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 15
- 239000000126 substance Substances 0.000 claims description 14
- 230000002378 acidificating effect Effects 0.000 claims description 10
- 150000002989 phenols Chemical class 0.000 claims description 4
- 150000007522 mineralic acids Chemical class 0.000 claims description 2
- 150000007524 organic acids Chemical class 0.000 claims description 2
- 238000007651 thermal printing Methods 0.000 description 37
- 239000007788 liquid Substances 0.000 description 13
- 238000005299 abrasion Methods 0.000 description 12
- 239000002245 particle Substances 0.000 description 12
- 238000010521 absorption reaction Methods 0.000 description 8
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 7
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 7
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 7
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 239000011230 binding agent Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 239000001023 inorganic pigment Substances 0.000 description 6
- -1 lactone compounds Chemical class 0.000 description 6
- 238000007639 printing Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000011161 development Methods 0.000 description 5
- LYRFLYHAGKPMFH-UHFFFAOYSA-N octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(N)=O LYRFLYHAGKPMFH-UHFFFAOYSA-N 0.000 description 5
- 239000000049 pigment Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000002844 melting Methods 0.000 description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 235000014113 dietary fatty acids Nutrition 0.000 description 3
- 239000000194 fatty acid Substances 0.000 description 3
- 229930195729 fatty acid Natural products 0.000 description 3
- 150000004665 fatty acids Chemical class 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000001993 wax Substances 0.000 description 3
- WNZQDUSMALZDQF-UHFFFAOYSA-N 2-benzofuran-1(3H)-one Chemical compound C1=CC=C2C(=O)OCC2=C1 WNZQDUSMALZDQF-UHFFFAOYSA-N 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 2
- 239000012736 aqueous medium Substances 0.000 description 2
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 238000005562 fading Methods 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 229920000592 inorganic polymer Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 229940037312 stearamide Drugs 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 239000012463 white pigment Substances 0.000 description 2
- LIZLYZVAYZQVPG-UHFFFAOYSA-N (3-bromo-2-fluorophenyl)methanol Chemical compound OCC1=CC=CC(Br)=C1F LIZLYZVAYZQVPG-UHFFFAOYSA-N 0.000 description 1
- MQCPOLNSJCWPGT-UHFFFAOYSA-N 2,2'-Bisphenol F Chemical compound OC1=CC=CC=C1CC1=CC=CC=C1O MQCPOLNSJCWPGT-UHFFFAOYSA-N 0.000 description 1
- HXIQYSLFEXIOAV-UHFFFAOYSA-N 2-tert-butyl-4-(5-tert-butyl-4-hydroxy-2-methylphenyl)sulfanyl-5-methylphenol Chemical group CC1=CC(O)=C(C(C)(C)C)C=C1SC1=CC(C(C)(C)C)=C(O)C=C1C HXIQYSLFEXIOAV-UHFFFAOYSA-N 0.000 description 1
- ZDRSNHRWLQQICP-UHFFFAOYSA-N 2-tert-butyl-4-[2-(3-tert-butyl-4-hydroxyphenyl)propan-2-yl]phenol Chemical group C1=C(O)C(C(C)(C)C)=CC(C(C)(C)C=2C=C(C(O)=CC=2)C(C)(C)C)=C1 ZDRSNHRWLQQICP-UHFFFAOYSA-N 0.000 description 1
- BOTKTAZUSYVSFF-UHFFFAOYSA-N 4-(2,4,4-trimethylpentan-2-yl)benzene-1,2-diol Chemical compound CC(C)(C)CC(C)(C)C1=CC=C(O)C(O)=C1 BOTKTAZUSYVSFF-UHFFFAOYSA-N 0.000 description 1
- QHPQWRBYOIRBIT-UHFFFAOYSA-N 4-tert-butylphenol Chemical compound CC(C)(C)C1=CC=C(O)C=C1 QHPQWRBYOIRBIT-UHFFFAOYSA-N 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- 229920001612 Hydroxyethyl starch Polymers 0.000 description 1
- 229920000881 Modified starch Polymers 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- TUNUQVHJKPBIQT-UHFFFAOYSA-J [OH-].[OH-].[Al+3].S(=O)(=O)([O-])[O-].[Al+3] Chemical compound [OH-].[OH-].[Al+3].S(=O)(=O)([O-])[O-].[Al+3] TUNUQVHJKPBIQT-UHFFFAOYSA-J 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229940037003 alum Drugs 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 235000012241 calcium silicate Nutrition 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 235000010980 cellulose Nutrition 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- MDQRDWAGHRLBPA-UHFFFAOYSA-N fluoroamine Chemical compound FN MDQRDWAGHRLBPA-UHFFFAOYSA-N 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 229940071826 hydroxyethyl cellulose Drugs 0.000 description 1
- 229940050526 hydroxyethylstarch Drugs 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 239000000976 ink Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 150000002500 ions Chemical group 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 235000019426 modified starch Nutrition 0.000 description 1
- FTQWRYSLUYAIRQ-UHFFFAOYSA-N n-[(octadecanoylamino)methyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCNC(=O)CCCCCCCCCCCCCCCCC FTQWRYSLUYAIRQ-UHFFFAOYSA-N 0.000 description 1
- RKISUIUJZGSLEV-UHFFFAOYSA-N n-[2-(octadecanoylamino)ethyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCCCCCCCC RKISUIUJZGSLEV-UHFFFAOYSA-N 0.000 description 1
- 150000004780 naphthols Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229940023462 paste product Drugs 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229940088417 precipitated calcium carbonate Drugs 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000001235 sensitizing effect Effects 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 description 1
- 235000019982 sodium hexametaphosphate Nutrition 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 238000000859 sublimation Methods 0.000 description 1
- 230000008022 sublimation Effects 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- AAAQKTZKLRYKHR-UHFFFAOYSA-N triphenylmethane Chemical compound C1=CC=CC=C1C(C=1C=CC=CC=1)C1=CC=CC=C1 AAAQKTZKLRYKHR-UHFFFAOYSA-N 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
- B41M5/337—Additives; Binders
- B41M5/3377—Inorganic compounds, e.g. metal salts of organic acids
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Heat Sensitive Colour Forming Recording (AREA)
Description
【発明の詳細な説明】
本発明は感熱記録材料に関し、詳しくは感熱フ
アクシミリ、感熱プリンター等において、カス付
着性及び過熱による中ぬけを改良した低摩耗性感
熱記録材料に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat-sensitive recording material, and more particularly to a low-wear heat-sensitive recording material that is used in heat-sensitive facsimiles, heat-sensitive printers, etc., and has improved scum adhesion and hollowing out due to overheating.
一般に無色又は淡色の発色性ラクトン化合物の
ような発色性染料化合物が無機酸、有機酸あるい
はフエノール性化合物等の酸性物質と接触するこ
とによつて発色することは既に公知である。また
この発色性染料化合物が酸性物質と熱溶融接触し
て発色記録を得る場合の感熱記録材料もよく知ら
れている。 It is already known that color-forming dye compounds, such as color-forming lactone compounds, which are generally colorless or light-colored, develop color when they come into contact with acidic substances such as inorganic acids, organic acids, or phenolic compounds. Also, heat-sensitive recording materials in which color-forming recording is obtained by bringing this color-forming dye compound into hot melt contact with an acidic substance are also well known.
従来、この種感熱記録材料は、酸性物質と発色
性染料化合物とをそれぞれ別個に結合剤を含む媒
体中で微粒状に粉砕後それら両者を混合し、これ
を紙などの支持体上に塗布、乾燥して所望する感
熱記録材料を得ていたが、このものは酸性物質の
粒子と発色性染料化合物の粒子とが結合剤中で相
互に隔離された状態で存在するために、これが加
熱されると、その一方若しくは両者が溶融して接
触し発色するものである。 Conventionally, this type of heat-sensitive recording material is produced by separately grinding an acidic substance and a color-forming dye compound into fine particles in a medium containing a binder, mixing them together, and coating the mixture on a support such as paper. The desired heat-sensitive recording material was obtained by drying, but since the particles of the acidic substance and the particles of the color-forming dye compound exist in a binder and are isolated from each other, they are heated. When one or both of them melt and come into contact with each other, a color develops.
一方感熱記録材料を用いる感熱フアクシミリ又
は感熱プリンター等の記録装置は、薄膜、厚膜あ
るいは半導体からなる発熱抵抗体を備えた熱印字
ヘツドを有していて、この熱印字ヘツドにパルス
電流を供給することによつて発生するジユール熱
で、印字ヘツドに接触している感熱記録材料を加
熱発色させるものである。このため、一般に感熱
記録材料は熱印字ヘツドに対して常に一定の圧力
で接触して走行するようになつているので、この
両者間における種々の相互作用に起因するトラブ
ルの多発が避けられなかつた。このようなトラブ
ルをなくするためには、熱印字ヘツドに対する適
合性として、感熱記録材料は、(1)熱印字ヘツドを
摩耗させないこと、(2)熱印字ヘツドを腐食させな
いこと、(3)熱印字ヘツドにカスが付着しないこ
と、(4)熱印字ヘツドに対して粘着性を示さないこ
となどの特性を有することが望まれる。 On the other hand, a recording device such as a thermal facsimile or a thermal printer using a thermal recording material has a thermal printing head equipped with a heating resistor made of a thin film, a thick film, or a semiconductor, and a pulse current is supplied to the thermal printing head. The heat-sensitive recording material that is in contact with the printing head is heated and colored by the produced heat. For this reason, the thermal recording material generally runs in constant contact with the thermal printing head, so it is inevitable that many troubles will occur due to various interactions between the two. . In order to eliminate such troubles, thermal recording materials must be compatible with thermal printing heads: (1) they should not wear out the thermal printing heads, (2) they should not corrode the thermal printing heads, and (3) they should be compatible with thermal printing heads. It is desirable that the printing head has the following properties: (4) it does not adhere to the printing head; and (4) it does not show adhesion to the thermal printing head.
例えば、発色成分の溶融温度を下げて発色開始
温度を低下させることにより発色性能を改善する
ために脂肪酸アミド等の増感剤を配合した感熱記
録材料を使用すると、これが熱印字ヘツドに接触
することによつて溶融した成分がカスとなつて付
着し、これが堆積することによつて、印字ヘツド
との接触を不良ならしめる結果、発色画像の品質
を低下させるばかりでなく、溶融成分の粘着性が
大きいと送り不能となるステイツクが生ずること
もある。この問題を解決するために、微粒炭酸カ
ルシウム、けい酸塩などの高吸油性無機顔料や尿
素樹脂顔料、タルク、活性白土、生澱粉粒子、高
融点ワツクスなどを配合して、熱印字ヘツドに対
する接触性を改善する試みもあるが、感熱記録材
料に望まれる上記の諸特性のすべてを満足させる
ものは未だ得られていない。 For example, when using a heat-sensitive recording material containing a sensitizer such as a fatty acid amide to improve color performance by lowering the melting temperature of the color-forming component and lowering the color-forming start temperature, this may come into contact with the thermal printing head. As a result, the molten components adhere as scum, which accumulates and causes poor contact with the print head, which not only reduces the quality of the colored image but also increases the stickiness of the molten components. If it is too large, a stag that cannot be fed may occur. To solve this problem, highly oil-absorbing inorganic pigments such as finely divided calcium carbonate and silicates, urea resin pigments, talc, activated clay, raw starch particles, and high-melting point waxes are blended to ensure contact with the thermal printing head. Although there have been attempts to improve the properties, it has not yet been possible to obtain a material that satisfies all of the above-mentioned properties desired in a heat-sensitive recording material.
さらに、近時情報処理の高速化の要請に伴い感
熱記録方式においてもより高速度での記録の必要
性が高まつている。このため機構的に熱印字ヘツ
ドでは加熱時間を短縮して高速化を図つており、
感熱記録材料を発色させるに必要な熱エネルギー
を供給するために、熱印字ヘツドをより高温にし
て対処している。しかし熱印字ヘツドを高温にす
るとそれに接触している感熱記録材料の発色中心
部が脱色する中ぬけと称する現象が生じ易い。 Furthermore, with the recent demand for faster information processing, there is an increasing need for even higher speed recording in thermal recording systems. For this reason, mechanically, thermal printing heads are designed to shorten heating time and increase speed.
In order to provide the necessary thermal energy to develop color in thermal recording materials, thermal printing heads are heated to higher temperatures. However, when the thermal printing head is heated to a high temperature, a phenomenon called hollowing tends to occur, in which the colored center of the heat-sensitive recording material that is in contact with it is decolored.
この中ぬけは熱印字ヘツドから供給された熱エ
ネルギーが発色の中心部で放散不良となり、感熱
記録層に含まれるフエノール類を昇華させる結
果、発色能を失なはせることに起因する。この中
ぬけを防止する方法として溶融潜熱を利用した過
剰熱エネルギーを吸収する等の企画（例えば特開
昭53−120542号）が提案されている。 This voiding is caused by the thermal energy supplied from the thermal printing head becoming poorly dissipated at the center of color development, causing phenols contained in the heat-sensitive recording layer to sublimate, resulting in a loss of color development ability. As a method of preventing this hollowing out, a plan has been proposed (for example, Japanese Patent Laid-Open No. 120542/1983) that uses latent heat of fusion to absorb excess thermal energy.
本発明は熱印字ヘツドに対する適合性に関する
上記諸特性を大巾に改善した新規な感熱記録材料
を提供することを目的としている。 The object of the present invention is to provide a new thermal recording material which has significantly improved the above-mentioned properties regarding its suitability for thermal printing heads.
すなわち、
(1) 本発明の目的は非常に低い摩耗性を有する感
熱記録材料を提供すること、
(2) 本発明の他の目的は熱印字ヘツドのカスの付
着性を改良した感熱記録材料を提供すること、
(3) 本発明のもう１つの目的は中ぬけを改善した
感熱記録材料を提供することにある。 That is, (1) an object of the present invention is to provide a heat-sensitive recording material having extremely low abrasion; (2) another object of the present invention is to provide a heat-sensitive recording material with improved adhesion of scum to a thermal printing head. (3) Another object of the present invention is to provide a heat-sensitive recording material with improved hollowness.
こゝにおいて本発明者等は熱印字ヘツドに対し
て摩耗性、カス付着性などの諸特性の改善に有効
な配合剤について研究した結果、塩基性多核錯イ
オン構造のアルミナホワイトを感熱記録材料の記
録層組成物に配合し、これを支持体上に塗布する
ことによつて極めて良好な性能を有する感熱記録
材料の得られることを見出し、本発明を完成し
た。 As a result of research into compounding agents that are effective for improving various properties of thermal printing heads, such as abrasion resistance and dirt adhesion, the present inventors found that alumina white, which has a basic polynuclear complex ionic structure, was used as a thermosensitive recording material. The present invention was completed based on the discovery that a heat-sensitive recording material having extremely good performance could be obtained by incorporating the compound into a recording layer composition and coating the same on a support.
本発明に使用されるアルミナホワイトは硫酸ア
ルミニウム若しくは明礬等の可溶性アルミニウム
塩とアルミン酸塩等のアルカリとの反応生成物で
あつて、現在普遍的に行なわれている製造方法は
湿式である。この化学反応によつて得られるアル
ミナホワイトの化学組成についてはいろいろの説
があり、未だ確定していないが、伴、幡野らの報
告〔色材協会誌、Vol33、No.7、P316−325、
（1960）〕によれば〔Al2SO4（OH）4・XH2O・2Al
（OH）3〕ｎの構造式を持つ水不溶性四塩基性硫
酸アルミニウム二水酸化アルミニウムで塩基性多
核錯イオン構造を有する一種の無機高分子化合物
といわれており典型的なものは下記のような物性
を有する。 Alumina white used in the present invention is a reaction product of a soluble aluminum salt such as aluminum sulfate or alum and an alkali such as an aluminate, and the currently widely used manufacturing method is a wet method. There are various theories about the chemical composition of alumina white obtained by this chemical reaction, and it is not yet confirmed, but it is reported by Ban, Hatano et al.
(1960)] [Al 2 SO 4 (OH) 4・XH 2 O・2Al
Water-insoluble tetrabasic aluminum sulfate aluminum dihydroxide with the structural formula (OH) 3 ]n is said to be a type of inorganic polymer compound with a basic polynuclear complex ion structure, and typical examples are as follows: It has physical properties.
比 重 2.35〜2.45
粒 径 0.02〜0.1μ
※吸油量 50〜130ml／100ｇ
熱安定性 60℃以上で化合水が徐々に分散放出
し、650〜850℃で硫酸根が分解、1000℃以上
で、Al2O3に変化する。Specific gravity 2.35-2.45 Particle size 0.02-0.1μ *Oil absorption 50-130ml/100g Thermal stability Compound water is gradually dispersed and released at temperatures above 60℃, sulfate radicals decompose at 650-850℃, and above 1000℃. Changes to Al 2 O 3 .
PH 4.5〜6.5
※JIS Ｋ−5101法による
このアルミナホワイトはＸ分子の化合水をもつ
ており、60℃以上に加熱するとこの化合水を徐々
に放出する。本発明はこの性質を利用して熱印字
ヘツドからの熱エネルギーを化合水の放出によつ
て吸収し、特に熱印字ヘツドの中心部の高温にな
る部分では多量のエネルギーを吸収するために加
熱された全域で平均した温度分布を示し、発色し
た中心部の中ぬけを防止する。PH 4.5-6.5 *According to JIS K-5101 method This alumina white has compound water of X molecules, and when heated above 60℃, it gradually releases this compound water. The present invention utilizes this property to absorb thermal energy from the thermal printing head by releasing compound water, and in particular, the central part of the thermal printing head, which becomes hot, is heated to absorb a large amount of energy. It shows an average temperature distribution over the entire area, and prevents the colored center from falling out.
またアルミナホワイトは吸油量が50〜130ml／
100ｇと大きく、熱印字ヘツドでのガスの付着を
防止する効果が大きい。本来アルミナホワイトは
クレヨン、油絵の具、インク等の体質顔料に主と
して使われる白色顔料であつて、屈折率が油脂物
質に極めて近似しており、色素体に配合してもそ
の色調をそこなうことがないので配合比を吸油量
で任意に変更できる利点がある。 In addition, alumina white has an oil absorption amount of 50 to 130ml/
It is large at 100g and is highly effective in preventing gas from adhering to the thermal printing head. Originally, alumina white is a white pigment mainly used in extender pigments such as crayons, oil paints, and inks, and its refractive index is extremely close to that of oil and fat substances, so it can be blended with pigment bodies without damaging its color tone. It has the advantage that the blending ratio can be changed arbitrarily depending on the oil absorption amount.
熱印字ヘツドの耐摩耗性が極めて良好であるの
は、アルミナホワイトが化合水の弱結合による橋
架け構造をとる無機高分子物質であつて、反応条
件によりPHが4.5〜6.5に制御され、他の無機顔料
にない特性を持つ軟質白色顔料であるためと思わ
れる。このようなアルミナホワイトは微粉末また
はペースト状のものが一般に知られている。ペー
スト状のアルミナホワイトの一次粒子の大きさは
0.02〜0.1μの範囲であり、粉末品は２〜5μ程度の
二次凝集体を形成している。 The reason why the thermal printing head has extremely good abrasion resistance is that alumina white is an inorganic polymer material that has a cross-linked structure due to weak bonds of compound water, and its pH is controlled between 4.5 and 6.5 depending on the reaction conditions. This is probably because it is a soft white pigment that has properties not found in other inorganic pigments. Such alumina white is generally known in the form of fine powder or paste. The size of the primary particles of paste-like alumina white is
The particle size is in the range of 0.02 to 0.1μ, and powder products form secondary aggregates of about 2 to 5μ.
このアルミナホワイトは酸性物質および発色性
染料化合物を含む組成物中に均質に分散させるの
が最も有効である。そしてアルミナホワイトを組
成物中に配合させる場合のアルミナホワイトの好
適な含有割合は対組成物約４〜80％（乾燥重量）
である。 This alumina white is most effective when homogeneously dispersed in a composition containing an acidic substance and a color-forming dye compound. When alumina white is incorporated into the composition, the preferred content ratio of alumina white is about 4 to 80% (dry weight) based on the composition.
It is.
上記アルミナホワイトの使用は、これが低摩耗
性である点で他の無機顔料を使用する以上に良好
な低摩耗効果を発揮させることができる。さらに
はこれに低表面エネルギーの潤滑剤例えばエチレ
ンビスアマイド等を共用することによつては、そ
れらの相乗効果が期待できるのでより効果的であ
る。 The use of alumina white can exhibit a better low abrasion effect than the use of other inorganic pigments in that it has low abrasion properties. Furthermore, it is more effective to use a low surface energy lubricant, such as ethylene bisamide, in combination, as a synergistic effect can be expected.
従つてこのアルミナホワイトを前記発色性染料
化合物および酸性物質を含む組成物中に配合（均
等分散）した感熱記録材料を支持体に塗布した感
熱層は、低摩耗性で熱印字ヘツドへのカス付着が
大巾に改善されるばかりか、特に発色中心部が脱
色する中ぬけ現象を効果的に解消でき、本発明の
意図する前記目的を同時に解決することができる
（実施例参照）。 Therefore, a heat-sensitive layer in which a heat-sensitive recording material in which alumina white is blended (uniformly dispersed) in a composition containing the above-mentioned color-forming dye compound and an acidic substance and coated on a support has low abrasion properties and prevents residue from adhering to the thermal printing head. Not only is this greatly improved, it is also possible to effectively eliminate the hollowing-out phenomenon in which the central part of the color is decolored, and the above-mentioned objects intended by the present invention can be solved at the same time (see Examples).
従来無機顔料、具体的にはJIS Ｋ−5101法によ
る吸油量50ml／100ｇ以上の粉体および／または
軽質炭酸カルシウムを支持体に塗布し、その上に
感熱層を設けることが感熱プリンターにおいて特
に有効であることは公知（特開昭54−23545号公
報参照）であるが、このものは反面、熱印字ヘツ
ドによる感熱記録材料の発色中心部が脱色する中
ぬけ現象が発生し易いことに鑑み、本発明にあつ
ては無機顔料ではありながら、吸油量50ml／100
ｇ以上すなわち50〜130ml／100ｇの粉体で吸油量
の大きな特殊組成（前記）からなるアルミナホワ
イトを前記感熱組成物に配合することによつて最
も効果的に中ぬけ現象の発生が解消でき、同時に
熱印字ヘツドへのカス付着を大巾に改善できる如
くしたもので、本発明はこの点に特徴を有する。 Conventionally, it is particularly effective in thermal printers to apply inorganic pigments, specifically powders and/or light calcium carbonate with an oil absorption of 50 ml/100 g or more according to the JIS K-5101 method, to a support and provide a heat-sensitive layer on top of the powder. It is well known (see Japanese Unexamined Patent Publication No. 54-23545), but on the other hand, in view of the fact that the central part of the heat-sensitive recording material that is colored by the thermal printing head is likely to lose its color, the hollowing out phenomenon is likely to occur. In the present invention, although it is an inorganic pigment, it has an oil absorption of 50 ml/100
The occurrence of the hollowing out phenomenon can be most effectively eliminated by blending alumina white, which is made of a special composition (described above) with a large oil absorption amount and has a powder size of 50 to 130 ml/100 g or more, into the heat-sensitive composition. At the same time, the present invention is characterized in that it is possible to greatly improve the adhesion of residue to the thermal printing head.
ここに使用するアルミナホワイトの水媒体への
分散については、ペースト品においては粒子の２
次凝集体がないので通常の無機顔料用の分散剤例
えば高分子燐酸塩等を用いて撹拌機等で容易に分
散できる。また粉末品については、アトライタ
ー、ボールミル等の分散機を用いれば希望の粒度
の分散体を得ることができる。 Regarding the dispersion of alumina white used here in an aqueous medium, in the case of a paste product, two particles of
Since there are no secondary aggregates, it can be easily dispersed using a stirrer or the like using a dispersant for ordinary inorganic pigments, such as a polymer phosphate. For powdered products, a dispersion with a desired particle size can be obtained using a dispersing machine such as an attritor or a ball mill.
本発明に用いられる無色または淡色の発色性染
料化合物は、この分野で一般に用いられている酸
性物質と反応して発色する物質であり、一般にロ
イコ染料化合物として知られている物である。こ
れら発色性染料化合物はアミノフルオラン系、ト
リフエニールメタン系、フタリツド系、スピロピ
ラン系で代表される各種発色性ロイコ化合物が挙
げられる。 The colorless or light-colored color-forming dye compound used in the present invention is a substance that develops color by reacting with an acidic substance commonly used in this field, and is generally known as a leuco dye compound. These color-forming dye compounds include various color-forming leuco compounds represented by aminofluoran, triphenylmethane, phthalide, and spiropyran.
また、酸性物質としては、常温では固体であ
り、好ましくは70℃以上の融点をもつ無機および
有機酸酸性粘土類、並びにフエノール性化合物を
使用することができる。特に加熱時軟化溶触また
は昇華して前記発色性染料化合物と反応して発色
させるものが好ましい。 Furthermore, as the acidic substance, inorganic and organic acidic clays and phenolic compounds that are solid at room temperature and preferably have a melting point of 70° C. or higher can be used. Particularly preferred are those that develop color by softening, melting or sublimation upon heating and reacting with the color-forming dye compound.
このような物質としては、４−ターシヤリ−ブ
チルフエノール、ナフトール類、４−ターシヤリ
−オクチルカテコール、２−２ヒドロオキシジフ
エノール、２，2′メチレンビスフエノール、４，
4′イソプロピリデンジフエノール、４，4′セコン
ダリ−イソブチリデンジフエノール ４，4′シク
ロヘキシリデンジフエノール、４，4′イソプロピ
リデンビス（２−ターシヤリ−ブチルフエノー
ル）、４，4′チオビス（６−ターシヤリ−ブチル
−３メチルフエノール）などが挙げられる。 Such substances include 4-tert-butylphenol, naphthols, 4-tert-octylcatechol, 2-2 hydroxydiphenol, 2,2'methylenebisphenol, 4,
4' isopropylidene diphenol, 4,4' secondary isobutylidene diphenol 4,4' cyclohexylidene diphenol, 4,4' isopropylidene bis(2-tertiary-butylphenol), 4,4' thiobis(6- Tertiary-butyl-3-methylphenol) and the like.
また、必要に応じて高級脂肪酸アミド、高級脂
肪酸とアミンの縮合物、石油及び石炭系ワツク
ス、植物系ワツクス等の増感剤並びに潤滑剤、発
泡を抑制するための消泡剤、筆記性向上のための
無機鉱物質顔料、各成分を互いに結合するための
結合剤、耐水化剤などを含有することができる。
たゞし、無機鉱物質顔料については、その配合量
が多くなると熱印字ヘツドを摩耗させる傾向が強
くなるので必要最少限に止め、配合量が過度にな
らないよう注意すべきである。 In addition, as necessary, we also supply sensitizers and lubricants such as higher fatty acid amides, condensates of higher fatty acids and amines, petroleum and coal-based waxes, and vegetable-based waxes, antifoaming agents to suppress foaming, and agents to improve writability. It may contain inorganic mineral pigments, binders for bonding each component to each other, waterproofing agents, etc.
However, if the amount of inorganic mineral pigments added increases, the tendency to wear out the thermal printing head will increase, so it should be kept to the minimum necessary amount and care should be taken not to add too much.
また増感潤滑剤としてアルミナホワイトと共用
する物質には、ステアリン酸アミド、エチレンビ
スステアリン酸アミド、メチロール化ステアリン
酸アミド等があるが、特に前２者がアルミナホワ
イトとの相乗効果が認められる。結合剤としては
ポリビニールアルコールおよびその誘導体、ヒド
ロキシエチルセルロース等の繊維素誘導体、澱粉
および澱粉誘導体、スチレン無マレイン酸共重合
体等の誘導体、水性結合剤、スチレン・ブタジエ
ン共重合体、アクリル酸エステル共重合体、酢酸
ビニール系エマルジヨン等の合成樹脂エマルジヨ
ンを用いることができる。 Substances used in common with alumina white as sensitizing lubricants include stearamide, ethylene bisstearamide, methylolated stearamide, etc., and the first two in particular have been found to have a synergistic effect with alumina white. Binders include polyvinyl alcohol and its derivatives, cellulose derivatives such as hydroxyethyl cellulose, starch and starch derivatives, derivatives such as styrene anhydrous copolymer, aqueous binders, styrene-butadiene copolymers, and acrylic acid ester copolymers. Synthetic resin emulsions such as polymers and vinyl acetate emulsions can be used.
本発明に使用される支持体としては紙が一般的
であるが合成樹脂フイルムおよび織物類まで使用
することができる。一般に紙は、見掛比重が後者
２者の中間に位置する。最終的に感熱記録材料は
カレンダー掛を行い、熱印字ヘツドへのマツチン
グを良くするために平滑化処理が行なわれる。 The support used in the present invention is generally paper, but synthetic resin films and textiles can also be used. Generally, paper has an apparent specific gravity between the latter two. Finally, the thermal recording material is calendered and smoothed for better matching to the thermal printing head.
感熱記録材料に用いられる組成物の各成分はこ
れを結合剤中に分散させた後、アトライター等で
微粉化する。水媒体に濡れにくいものは濡剤又は
界面活性剤を用いる。 Each component of the composition used in the heat-sensitive recording material is dispersed in a binder and then pulverized using an attritor or the like. Wetting agents or surfactants are used for materials that are difficult to wet with aqueous media.
本発明のアルミナホワイトを含む感熱記録材料
組成物はエヤーナイフ、マイヤーバー、ロールコ
ーター等の塗工機で塗布することができる。乾燥
は高温条件下では発色するので60〜70℃以下の比
較的低温下で行うべきである。 The heat-sensitive recording material composition containing alumina white of the present invention can be coated with a coating machine such as an air knife, Meyer bar, or roll coater. Drying should be carried out at a relatively low temperature of 60 to 70°C or lower, as color develops under high temperature conditions.
なお、アルミナホワイトを支持体上に予め塗布
して置く場合として、紙を支持体とするときは、
抄紙機上のサイズプレス塗工機を用いることがで
きる。 In addition, when alumina white is pre-coated on the support and paper is used as the support,
A size press coater on a paper machine can be used.
以下本発明の実施例およびその比較例を示す。
たゞし実施例および比較例中の部および％はすべ
て重量で表す。 Examples of the present invention and comparative examples thereof will be shown below.
All parts and percentages in Examples and Comparative Examples are expressed by weight.
実施例 １
Ａ 液
クリスタルバイオレツトラクトン １部
５％ヒドロキシエチルセルロース ４部
Ｂ 液
４，4′イソプロピリデンジフエノール １部
５％ヒドロキシエチルセルロース ４部
Ｃ 液
エチレンビスステアリルアミド １部
５％ヒドロキシエチルセルロース ４部
Ｄ 液
アルミナホワイトＨ（大明化学工業社製、吸油量
95〜100ml／100ｇ） １部
40％低分子ポリアクリル酸塩（分散剤）（東亜合
成社製アロンＴ−40） 0.025部
水 ２部
10％ヒドロキシエチルセルロース ２部
以上のＡ液、Ｂ液、Ｃ液、Ｄ液はそれぞれ別個
に固形物の粒径が2μ以下になるように、またＤ
液は粒径が1μ以下になるようにアトライターで
粉砕した。次いで、Ａ：Ｂ：Ｃ：Ｄ＝１：２：
0.5：４の重量比の割合で各液を混合して感熱記
録組成物とした。この組成物を50ｇ／m2の紙の片
面にエアナイフコーターで乾燥重量が６ｇ／m2と
なるように塗布、乾燥して感熱記録紙を得、さら
にスーパーカレンダーにて仕上り厚味が65μにな
るように平滑仕上げを行つた。Example 1 A Liquid crystal violet lactone 1 part 5% hydroxyethyl cellulose 4 parts B Liquid 4,4'isopropylidene diphenol 1 part 5% hydroxyethyl cellulose 4 parts C Liquid ethylene bisstearylamide 1 part 5% hydroxyethyl cellulose 4 parts D Liquid Alumina White H (manufactured by Daimei Kagaku Kogyo Co., Ltd., oil absorption
95-100ml/100g) 1 part 40% low molecular weight polyacrylate (dispersant) (Aron T-40 manufactured by Toagosei Co., Ltd.) 0.025 parts water 2 parts 10% hydroxyethyl cellulose 2 parts Above A, B, and C The liquid and the D liquid are each separated separately so that the particle size of the solid particles is 2μ or less, and the D
The liquid was pulverized with an attritor so that the particle size was 1μ or less. Then A:B:C:D=1:2:
The respective liquids were mixed at a weight ratio of 0.5:4 to prepare a heat-sensitive recording composition. This composition was applied to one side of 50 g/m 2 paper using an air knife coater so that the dry weight was 6 g/m 2 and dried to obtain heat-sensitive recording paper, which was then finished using a super calender to a thickness of 65 μm. A smooth finish was achieved.
この感熱記録材料を60mm巾にスリツトし、
Oliveti社Divisumma33型感熱プリンターに全巾
８の字の印字で15万行、約650ｍ連続印字した結
果、熱印字ヘツド10個の平均摩耗値は5μ以内で
あつた。また熱印字ヘツドの周りには僅かカスの
付着が認められる程度であつたが、特に印字のカ
スレがなく中ぬけ現象も全く見られなかつた。テ
スト前の熱印字ヘツドの10個の平均の高さは50μ
である。 This heat-sensitive recording material is slit into 60mm width.
As a result of continuous printing of 150,000 lines of 8 characters in total width for approximately 650 m using an Oliveti Divisumma 33 type thermal printer, the average abrasion value of 10 thermal printing heads was within 5μ. Further, although a slight amount of residue was observed around the thermal printing head, there was no particular fading of the print and no hollowing phenomenon was observed at all. The average height of 10 thermal printing heads before testing is 50μ
It is.
実施例 ２
実施例１で調成したＡ液、Ｂ液、Ｃ液、Ｄ液を
Ａ：Ｂ：Ｃ：Ｄ＝１：３：0.5：８の重量比で各
液を混合し、実施例１と同様にして塗布量８ｇ／
m2の感熱記録紙を得た後、同様の方法により感熱
プリンターにかけた結果、熱印字ヘツド10個の平
均摩耗値は5μ以内であり、熱印字ヘツドにカス
の付着は殆んど認められないばかりか、中ぬけ現
象は全く見られなかつた。Example 2 Liquids A, B, C, and D prepared in Example 1 were mixed at a weight ratio of A:B:C:D=1:3:0.5:8, and Example 1 was prepared. Apply the same amount as 8g/
After obtaining 2 m2 of thermal recording paper, we applied it to a thermal printer using the same method. As a result, the average abrasion value of 10 thermal printing heads was within 5 μm, and almost no residue was observed on the thermal printing heads. Not only that, no drop-out phenomenon was observed at all.
実施例 ３
実施例１のＣ液の代りに
ステアリン酸アミド（川研フアインケミカル社製
商品名カワスリツプVL） １部
５％ヒドロキシエチルセルロース ４部
を実施例１と同様にしてアトライターで微粒化処
理し、次いでＡ：Ｂ：Ｃ（本例３）：Ｄ＝１：２：
0.5：４の重量比の割合で各液を混合し、実施例
１と同様にして感熱記録紙を得た後同様の方法に
より感熱プリンターにかけた結果、熱印字ヘツド
10個の平均摩耗値は5μ以内であり、熱印字ヘツ
ドへのカス付着は僅かであつた。Example 3 Instead of liquid C in Example 1, 1 part of stearic acid amide (trade name Kawaslip VL, manufactured by Kawaken Fine Chemicals) and 4 parts of 5% hydroxyethyl cellulose were atomized using an attritor in the same manner as in Example 1. and then A:B:C (this example 3):D=1:2:
The respective liquids were mixed at a weight ratio of 0.5:4, thermal recording paper was obtained in the same manner as in Example 1, and as a result of applying it to a thermal printer in the same manner, a thermal printing head was obtained.
The average abrasion value of the 10 pieces was within 5 μm, and there was little amount of residue adhering to the thermal printing head.
またこの感熱記録紙を巾210mmにスリツトし長
さ100ｍの巻取を作成した後、OKI−FAX600（沖
電気工業社製）によりヘツド電圧10.5Vで市松模
様（50％発色のテストパターン）を100ｍ印字後
カスの付着状態を観察したところ、カスの付着は
0.5〜１mmで少く、発色中心部の中ぬけは全く認
められなかつた。 In addition, after slitting this thermal recording paper to a width of 210 mm and creating a roll of 100 m in length, a checkered pattern (test pattern with 50% color development) was printed for 100 m at a head voltage of 10.5 V using an OKI-FAX600 (manufactured by Oki Electric Industry Co., Ltd.). When observing the state of adhesion of residue after printing, it was found that the adhesion of residue was
The color was small, ranging from 0.5 to 1 mm, and no hollowing was observed at the center of color development.
比較例 １
沈降性炭酸カルシウム（白石工業社製商品名ツネ
ツクスＥ平均粒径0.5μ吸油量32ml／100ｇ）１部
５％ヘキサメタ燐酸ソーダ 0.08部
５％ヒドロキシエチルセルロース ４部
実施例１のＤ液に代え、上記組成からなる液を
実施例１と同様にアトライターで粒径1μ以下と
なるように微粒化処理し、次いで実施例１のＤ液
の代りに同量を用いて実施例１と同様に感熱記録
紙を得、同様の方法により感熱プリンターにかけ
たところ、熱印字ヘツド10個の平均摩耗値は30μ
であり、また熱印字ヘツドのカスの付着が多く、
約10万行印字すなわち400ｍ附近で一部の印字が
カス付着のため一時的に薄くなるトラブルがあつ
た。Comparative Example 1 Precipitated calcium carbonate (manufactured by Shiraishi Kogyo Co., Ltd., trade name Tsunetx E, average particle diameter 0.5μ, oil absorption 32ml/100g) 1 part 5% sodium hexametaphosphate 0.08 parts 5% hydroxyethylcellulose 4 parts Replaced with Solution D in Example 1 The liquid having the above composition was atomized using an attritor in the same manner as in Example 1 so that the particle size was 1μ or less, and then the same amount was used in place of the D liquid in Example 1, and the same process as in Example 1 was carried out. When thermal recording paper was obtained and applied to a thermal printer using the same method, the average abrasion value of 10 thermal printing heads was 30μ.
Also, there is a lot of residue on the thermal printing head,
There was a problem where approximately 100,000 lines were printed, or at around 400m, some of the prints became temporarily faded due to adhesion of residue.
また本例の炭酸カルシウムに代え微粒水酸化ア
ルミを使用して同様のテストをしたが、比較例１
と同様の結果であつた。さらにまた活性白土を使
用した場合を同様にテストしたが、カスの付着は
殆んど認められなかつたに拘らず、摩耗値は35μ
以上を示した。 In addition, a similar test was conducted using fine aluminum hydroxide instead of calcium carbonate in this example, but Comparative Example 1
The results were similar. Furthermore, when activated clay was used in a similar test, the wear value was 35μ, although there was hardly any residue observed.
The above has been shown.
比較例 ２
実施例３のＤ液の代りに比較例１の液を用い実
施例３と同様な感熱記録材料を得、感熱プリンタ
ーでの熱印字ヘツドの摩耗試験を行つたところ摩
耗値は30μであり、しかも熱印字へのカスの付着
が実施例３に見られるより遥かに多く約10万行
400ｍ附近で印字のカスレ現象が発生した。さら
に実施例３と同様OKI−FAX600で100ｍ印字後
ヘツドのカスの付着状態を観察したところ、３〜
４mmのカスの付着が認められ、かつ発色中心部に
中ぬけが発生しているのが認められた。Comparative Example 2 A heat-sensitive recording material similar to that of Example 3 was obtained by using the liquid of Comparative Example 1 instead of Liquid D of Example 3, and an abrasion test of the thermal printing head in a thermal printer was conducted, and the abrasion value was 30μ. Moreover, there was much more residue attached to thermal printing than in Example 3, about 100,000 lines.
Fading of print occurred at around 400m. Furthermore, as in Example 3, we observed the adhesion of debris on the head of the OKI-FAX600 after printing for 100 m.
Adhesion of 4 mm of debris was observed, and hollowing was observed at the center of the color development.
Claims (1)
酸、有機酸またはフエノール性化合物等の酸性物
質との混合組成物からなる熱時発色しうる感熱層
を支持体に設けた感熱記録材料において、前記感
熱層がアルミナホワイトを含有したことを特徴と
する感熱記録材料。1. A heat-sensitive recording material in which a support is provided with a heat-sensitive layer capable of developing color when heated, which is made of a mixed composition of a colorless or light-colored dye compound and an acidic substance such as an inorganic acid, an organic acid, or a phenolic compound. A heat-sensitive recording material characterized in that the layer contains alumina white.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9959679A JPS5624192A (en) | 1979-08-04 | 1979-08-04 | Thermo-sensitive recording material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9959679A JPS5624192A (en) | 1979-08-04 | 1979-08-04 | Thermo-sensitive recording material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5624192A JPS5624192A (en) | 1981-03-07 |
| JPH0116678B2 true JPH0116678B2 (en) | 1989-03-27 |
Family
ID=14251470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9959679A Granted JPS5624192A (en) | 1979-08-04 | 1979-08-04 | Thermo-sensitive recording material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5624192A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4415627A (en) * | 1980-12-23 | 1983-11-15 | Mitsubishi Paper Mills, Ltd. | Chemically resistant thermosensitive recording paper |
| JPS5955790A (en) * | 1982-09-25 | 1984-03-30 | Dainippon Printing Co Ltd | Heat sensitive recording material |
| JPS59145187A (en) * | 1983-02-08 | 1984-08-20 | Ricoh Co Ltd | Heat-sensitive recording material |
| JPS6281875U (en) * | 1985-11-07 | 1987-05-25 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5423545A (en) * | 1977-07-22 | 1979-02-22 | Mitsubishi Paper Mills Ltd | Heat sensitive paper with reduced adherability of dregs to thermal head |
-
1979
- 1979-08-04 JP JP9959679A patent/JPS5624192A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5423545A (en) * | 1977-07-22 | 1979-02-22 | Mitsubishi Paper Mills Ltd | Heat sensitive paper with reduced adherability of dregs to thermal head |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5624192A (en) | 1981-03-07 |
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