Heat-expandable sheet, method for producing heat-expandable sheet and shape
A technology of thermal expansion and manufacturing method, applied in chemical instruments and methods, replication/marking methods, film/sheet-like adhesives, etc., which can solve the problems of difficult to express bright colors, low whiteness, yellowing on the surface, etc.
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Embodiment approach 1
[0021] The thermally expandable sheet 10 according to Embodiment 1 is as figure 1 As shown, a substrate 11 , a first thermal expansion layer 12 , a second thermal expansion layer 13 , and an ink receiving layer 14 are provided. The first heat-expandable layer 12 and the second heat-expandable layer 13 constitute the heat-expandable layer of the heat-expandable sheet 10 . In addition, as described in detail later, the thermally expandable sheet 10 is Figure 3A ~ Figure 3C The three-dimensional image forming system 50 schematically shown in FIG. 2 is printed, and a concave-convex shape (three-dimensional image) is formed on the surface thereof.
[0022] The base material 11 is a sheet-like member that supports the thermal expansion layer. As the base material 11, paper such as high-quality paper, medium-quality paper, synthetic paper, or polypropylene, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), etc. are used. Plastic film used. In addition, the base...
Embodiment approach 2
[0061] The thermally expandable sheet 20 according to Embodiment 2 will be described with reference to the drawings. The difference between the thermally expandable sheet 20 according to Embodiment 2 and the thermally expandable sheet 10 according to Embodiment 1 is that a third thermally expandable layer 21 is provided between the first thermally expandable layer 12 and the base material 11 . In other words, in the present embodiment, the first thermal expansion layer 12 , the second thermal expansion layer 13 , and the third thermal expansion layer 21 constitute thermal expansion layers. Parts having the same configuration as those in Embodiment 1 are denoted by the same reference numerals, and detailed description thereof will be omitted.
[0062] The third heat expansion layer 21 such as Figure 7 It is formed between the base material 11 and the first thermal expansion layer 12 as represented. In the third thermally expandable layer 21 , thermally expandable materials M...
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Abstract
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