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US 11,685,139 B2Granted
Thermally expandable sheet production method and shaped object production method
AssigneeCasio Computer Co., Ltd.
InventorsYoshimune Motoyanagi, Yuji Horiuchi
Life of this patent
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Abstract
A thermally expandable sheet includes: a first thermally expansive layer that is formed on one side of a base and contains a first thermally expandable material; and a second thermally expansive layer that is formed on the first thermally expansive layer and contains a second thermally expandable material, wherein the second thermally expandable material further contains white pigment.
Claims20
A thermally expandable sheet production method comprising:
- a first formation step of forming on one side of a base a first thermally expansive layer comprising a first thermally expandable material;
- and
- a second formation step of forming on the first thermally expansive layer a second thermally expansive layer comprising a second thermally expandable material,
- wherein in the second formation step, white pigment is added to the second thermally expansive layer, and
- wherein in the first formation step, the white pigment is not added to the first thermally expansive layer.
2 more elements
A shaped object production method comprising:
- a first step of forming on one side of a base a thermally expansive layer comprising a thermally expandable material to form a thermally expandable sheet;
- and
- a second step of applying heat to at least a portion of the thermally expandable sheet with a temperature, to cause expansion of the thermally expansive layer and rising of a surface of the thermally expandable sheet and to form unevenness on the surface of the thermally expandable sheet, the temperature being a temperature that allows expansion of the thermally expansive layer, the surface corresponding to the portion of the thermally expandable sheet to which the heat is applied,
- wherein the first step comprises:
- a first sub-step of forming on the one side of the base a first thermally expansive layer comprising a first thermally expandable material;
- and
- a second sub-step of forming on the first thermally expansive layer a second thermally expansive layer comprising a second thermally expandable material,
- wherein in the second sub-step, white pigment is added to the second thermally expansive layer, and
- wherein in the first sub-step, the white pigment is not added to the first thermally expansive layer.
6 more elements
A shaped object production method comprising:
- a first step of forming on one side of a base a thermally expansive layer comprising a thermally expandable material to form a thermally expandable sheet;
- and
- a second step of applying heat to at least a portion of the thermally expandable sheet with a temperature, to cause expansion of the thermally expansive layer and rising of a surface of the thermally expandable sheet and to form unevenness on the surface of the thermally expandable sheet, the temperature being a temperature that causes the thermally expansive layer to expand, the surface corresponding to the portion of the thermally expandable sheet to which the heat is applied,
- wherein in the first step, a plurality of the thermally expansive layers are formed, the plurality of thermally expansive layers including a topmost thermally expansive layer, and
- wherein the topmost thermally expansive layer comprises white pigment, and among the plurality of thermally expansive layers, thermally expansive layers other than the topmost thermally expansive layer do not comprise the white pigment.
2 more elements
Dependencies are inferred from the claim text.