INFORMATION WRITABLE FILM AND A SAMPLE STORAGE TUBE

摘要

To provide an information writable film that is chemical and abrasion resistance, and is suitable for high contrast white laser marking. The information writable film comprises a writable film layer 110 and a reading assistance layer 120. The writable film layer 110 is formed into a film shape by thinly stretching a material, which material is a mixture of a color former composition for coloring white when receiving the particular wavelength laser beam by changing its physical and chemical characteristic and a transparent plastic composition. The reading assistance layer 120 is provided enhancing the contrast ratio. The writable film layer 110 is provided with laser coloring properties and chemical and abrasion resistance. During writing, an identification code is written by laser by coloring the color former in the writable film layer 110. During reading, the contrast ratio is enhanced by superimposing the color of the reading assistance layer 120.

主权项

1. An information writable film applicable to the surface of a target, the color of the area of the target where the information to be written by a laser marking being originally black and a mark written in the information writable film in white, comprising;
a writable film layer comprising a of light-transmissive material formed in a film shape, wherein a color former including a photo-sensitive composition or a heat-sensitive composition which can be changeable from a black color with light transmission ratio 0% to 95% state to the white color state by shifting a physical characteristic or a chemical characteristic by irradiating a particular wavelength laser beam, mixed with a transparent plastic resin having a desired chemical resistance and structural strength; the writable film layer as a single layer enhancing the chemical resistance and the structural strength by mixing with the transparent plastic resin, and preventing the deterioration of the contrast ratio due to mixing with the transparent plastic resin by superimposing the base black color of the writable film layer.