IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0581106
(1984-02-17)
|
우선권정보 |
JP-0031457 (1981-03-05) |
발명자
/ 주소 |
- Maruta, Keiichi
- Yuyama, Yukihiro
|
출원인 / 주소 |
|
대리인 / 주소 |
Flynn, Thiel, Boutell & Tanis
|
인용정보 |
피인용 횟수 :
17 인용 특허 :
1 |
초록
▼
A thermosensitive recording material is disclosed suitable for use in thermosensitive-recording-type tickets, including magnetic tickets, and thermosensitive-recording-type labels, comprising a support material; a thermosensitive coloring layer formed on the front side of the support material, which
A thermosensitive recording material is disclosed suitable for use in thermosensitive-recording-type tickets, including magnetic tickets, and thermosensitive-recording-type labels, comprising a support material; a thermosensitive coloring layer formed on the front side of the support material, which thermosensitive coloring layer comprises a leuco dye and an acidic material capable of coloring the leuco dye when heat is applied thereto; and a protective layer formed on the thermosensitive coloring layer, which protective layer comprises a polyvinyl alcohol with a saponification ratio ranging from 70% to 85% and is capable of preventing intrusion of materials which may discolor the thermosensitive coloring layer.
대표청구항
▼
1. A thermosensitive recording material comprising, in successive layers: a support material; a thermosensitive coloring layer formed on the front side of said support material, said thermosensitive coloring layer comprising a leuco dye and an acidic material, said acidic material being capable
1. A thermosensitive recording material comprising, in successive layers: a support material; a thermosensitive coloring layer formed on the front side of said support material, said thermosensitive coloring layer comprising a leuco dye and an acidic material, said acidic material being capable of causing said leuco dye to become colored when heat is applied thereto; and a protective layer formed on the front side of said thermosensitive coloring layer, said protective layer comprising polyvinyl alcohol having a saponification ratio in the range of from 70% to 85%. 2. A thermosensitive recording material as claimed in claim 1, further comprising a magnetic recording layer formed on the back side of said support material, opposite to said thermosensitive coloring layer. 3. A thermosensitive recording material as claimed in claim 2, wherein said magnetic recording layer comprises a ferromagnetic substance and a binder agent for binding said ferromagnetic substance to said support material. 4. A thermosensitive recording material as claimed in claim 1, further comprising an adhesive layer formed on the back side of said support material, opposite to said thermosensitive coloring layer, said adhesive layer being suitable for adhesively securing said recording material to a surface. 5. A thermosensitive recording material as claimed in claim 4, further comprising a barrier layer between the back side of said support material and said adhesive layer, said barrier layer comprising a polymeric material capable of inhibiting penetration of materials capable of discoloring said thermosensitive coloring layer. 6. A thermosensitive recording material as claimed in claim 4, further comprising a disposable backing sheet which is attached to said adhesive layer and can be peeled off said adhesive layer when said thermosensitive recording material is used. 7. A thermosensitive recording material as claimed in claim 1, wherein said protective layer further comprises at least one member selected from the group consisting of a thermosetting organic filler, an organic antifriction agent and a water resistant agent. 8. A thermosensitive recording material as claimed in claim 7, said thermosetting organic filler is a member selected from the group consisting of urea-formaldehyde resin, phenolic resin, polycarbonate resin and malamine resin. 9. A thermosensitive recording material as claimed in claim 8, wherein the amount of said thermosetting organic filler in said protective layer is in the range of 5 to 40 weight percent with respect to the total weight of said protective layer. 10. A thermosensitive recording material as claimed in claim 7, wherein said organic antifriction agent is a member selected from the group consisting of animal waxes, vegetable waxes, petroleum waxes and synthetic waxes other than petroleum waxes. 11. A thermosensitive recording material as claimed in claim 10, wherein the amount of said organic antifriction agent in said protective layer is in the range of 20 to 60 weight percent with respect to the total weight of said protective layer. 12. A thermosensitive recording material as claimed in claim 1, wherein said leuco dye is a member selected from the group consisting of triphenylmethane leuco dyes, fluoran leuco dyes, phenothiazine leuco dyes, Auramine leuco dyes and spiropyran leuco dyes. 13. A thermosensitive recording material as claimed in claim 1, wherein said acidic material is a member selected from the group consisting of organic acids, inorganic acids and phenolic materials. 14. A thermosensitive recording material as claimed in claim 1, wherein said thermosensitive coloring layer further comprises a binder agent containing a water-soluble organic polymer. 15. In a thermosensitive recording material comprising a support and a thermosensitive coloring layer formed on the front side of said support, said thermosensitive coloring layer containing a leuco dye and an acidic material capable of coloring said leuco dye when heat is applied thereto, the improvement which comprises: a protective layer formed on and covering the front side of said thermosensitive coloring layer for protecting said thermosensitive coloring layer against the action of plasticizers contained in plastic films that contact said recording material, said protective layer comprising polyvinyl alcohol resin having a saponification ratio in the range of from 70% to 85%, said protective layer being thin so that it does not hinder coloring of said thermosensitive coloring layer when heat is applied to said protective layer to effect coloring of said coloring layer.
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