PLASTICS FILM, USE OF DYESTUFFS THEREIN AND PROCESS FOR TESTING THE AUTHENTICITY OF PACKAGED GOODS
摘要
A dyestuff capable of undergoing a clearly visible colour change when contacted with a colour-developing material is dispersed in the body of a plastics film and used in the identification of goods. The film can be used for packaging of the goods or as a label or seal affixed to the goods. When testing the authenticity of packaging goods, the plastics film is marked with the colour-developing chemical to produce a coloured mark on the package. The dyestuff is preferably a latent dyestuff which is colourless and invisible to the eye under ambient conditions for use of the film but which forms a clearly visible colour when contacted with the colour-developing material.
申请公布号
WO0005076(A1)
申请公布日期
2000.02.03
申请号
WO1999GB02310
申请日期
1999.07.19
申请人
ACORDIS ACETATE CHEMICALS LIMITED;LONGDON, TONY;HEALD, GWYNNETH, ANNE;LAW, PAUL, WILLIAM
发明人
LONGDON, TONY;HEALD, GWYNNETH, ANNE;LAW, PAUL, WILLIAM