Claims
- 1. A method for producing a foamed body having a chemically embossed pattern, which comprises:
- forming a composition containing a plasticized vinyl chloride resin, a synthetic rubber material capable of being vulcanized, a blowing agent, a vulcanizing agent and a vulcanization promotor into a sheet;
- printing an ink containing a vulcanizing accelerator onto said sheet in a desired configuration;
- drying and curing the printed sheet by heating said printed sheet to a temperature of up to 100.degree. C.; and
- heating said dried sheet to a temperature of 150.degree.-250.degree. C. to cause foaming of said sheet thereby generating a sheet having said chemically embossed patterns therein.
- 2. The method of claim 1, wherein said blowing agent is dinitrosopentamethylenetretramine or azodicarbonamide.
- 3. The method of claim 1, wherein said vulcanization accelerator is 2-mercaptobenzothiazole, a zinc salt of 2-mercaptobenzothiazole, a sodium salt of 2-mercaptobenzothiazole, tetramethylthiuram monosulfide, tetramethylthiuran disulfide,piperidine.multidot.pentamethylene.multidot.dithiocarbamate, zinc diethyldithiocarbamate, or zinc.multidot.dibutyl.multidot.xanthate.
- 4. The method of claim 1, wherein said composition contains 20 to 60 parts by weight of said synthetic rubber material per 100 parts by weight of said vinyl chloride resin.
- 5. The method of claim 1, wherein said vulcanizing agent is sulfur and said vulcanization promotor is zinc oxide.
- 6. The method of claim 1, wherein said composition further comprises at least one additive selected from the group consisting of a stabilizer, a lubricant and a pigment.
- 7. The method of claim 1, wherein said dried sheet is foamed over a temperature of 180.degree.-210.degree. C.
- 8. The method of claim 1, wherein said printed sheet is dried and cured at a temperature of 90.degree. C. to 100.degree. C.
- 9. The method of claim 1, wherein said vinyl chloride resin is a homopolymer of vinyl chloride or a copolymer of vinyl chloride with vinyl acetate, ethylene, propylene, acrylic acid ester or maleic acid ester.
- 10. The method of claim 1, wherein said vulcanizing agent is sulfur.
- 11. The method of claim 1, wherein said rubber containing composition contains from 1.5 to 6 parts by weight of said blowing agent per 100 parts by weight of said vinyl chloride resin.
- 12. The method of claim 1, wherein the amount of said vulcanization promotor ranges from 0.2 to 10 parts by weight per 100 parts by weight of said vinyl chloride resin.
- 13. The method of claim 1, wherein the amount of said vulcanizing agent ranges from 1-5 parts by weight per 100 parts by weight of said synthetic rubber component.
- 14. The method of claim 1, wherein the amount of said vulcanizing accelerator in said ink ranges from 7-30 wt.%.
- 15. A method for producing a foamed body having chemically embossed patterns therein, which comprises:
- forming a composition of a plasticized vinyl chloride resin, a synthetic rubber material containing terminal groups capable of reacting with isocyanates and a blowing agent into a sheet;
- printing said sheet with an ink containing an isocyanate capable of reacting with said synthetic rubber into a desired configuration;
- drying said printed sheet; and
- heating said dried sheet to decompose the blowing agent in said composition thereby forming said foamed body containing a chemically embossed pattern therein.
- 16. The method of claim 15, wherein said isocyanate in said printing ink is a toluene diisocyanate, diphenylisocyanate, an aliphatic polyisocyanate, a low molecular weight prepolymer containing terminal isocyanate groups, a polymethylene polyphenyl isocyanate or polyfunctional aliphatic isocyanate.
- 17. The method of claim 15, wherein said rubber containing composition further comprises at least one additive selected from the group consisting of a stabilizer, a lubricant and a pigment.
- 18. The method of claim 15, wherein the amount of said isocyanate in said ink ranges from 3-30 wt.%.
- 19. The method of claim 15, wherein said vinyl chloride resin is a homopolymer of vinyl chloride or a copolymer of vinyl chloride with vinyl acetate, ethylene, propylene, acrylic acid ester or maleic acid ester.
- 20. The method of claim 15, wherein said rubber containing composition contains from 1.5 to 6 parts by weight of said blowing agent per 100 parts by weight of said vinyl chloride resin.
- 21. The method of claim 15, wherein said blowing agent is dinitroisopentamethylenetretramine or azodicarbonamide.
- 22. The method of claim 15, wherein said dried sheet is foamed over a temperature of 180.degree.-210.degree. C.
- 23. The method of claim 15, wherein said printed sheet is dried and cured at a temperature of 90.degree. C. to 100.degree. C.
- 24. An embossed foamed body prepared by the method of claim 1.
- 25. An embossed foamed body prepared by the method of claim 15.
Priority Claims (1)
Number |
Date |
Country |
Kind |
50-21655 |
Feb 1975 |
JPX |
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CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part of application Ser. No. 659,104, filed Feb. 18, 1976 now Pat. No. 4,082,876.
US Referenced Citations (9)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
659104 |
Feb 1976 |
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