WO2012040985A1 - 一种形状记忆防伪标识的制作方法 - Google Patents

一种形状记忆防伪标识的制作方法 Download PDF

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Publication number
WO2012040985A1
WO2012040985A1 PCT/CN2010/080101 CN2010080101W WO2012040985A1 WO 2012040985 A1 WO2012040985 A1 WO 2012040985A1 CN 2010080101 W CN2010080101 W CN 2010080101W WO 2012040985 A1 WO2012040985 A1 WO 2012040985A1
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Prior art keywords
sheet
shape memory
pattern
concave
temperature
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PCT/CN2010/080101
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English (en)
French (fr)
Inventor
章中群
章一叶
柯丽兰
Original Assignee
广州市曼博瑞材料科技有限公司
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Application filed by 广州市曼博瑞材料科技有限公司 filed Critical 广州市曼博瑞材料科技有限公司
Priority to US13/876,864 priority Critical patent/US9833934B2/en
Priority to EP10857746.1A priority patent/EP2624241B1/en
Publication of WO2012040985A1 publication Critical patent/WO2012040985A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0001—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
    • B29C59/04—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/18—Surface shaping of articles, e.g. embossing; Apparatus therefor by liberation of internal stresses, e.g. plastic memory
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
    • B29C61/003—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
    • B29C61/04—Thermal expansion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/475—Cutting cards
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/48—Controlling the manufacturing process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
    • B29B13/023—Half-products, e.g. films, plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/009—Shaping techniques involving a cutting or machining operation after shaping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • B29C45/0055—Shaping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2021/00—Use of unspecified rubbers as moulding material
    • B29K2021/003—Thermoplastic elastomers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/08—Copolymers of ethylene
    • B29K2023/083—EVA, i.e. ethylene vinyl acetate copolymer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
    • B29K2027/06—PVC, i.e. polyvinylchloride
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • B29K2067/04—Polyesters derived from hydroxycarboxylic acids
    • B29K2067/046—PLA, i.e. polylactic acid or polylactide

Definitions

  • the invention relates to a manufacturing method, in particular to a method for manufacturing a shape memory anti-counterfeiting mark.
  • a Chinese patent application (Patent Application No. 201010239475.8) describes a method for producing a shape memory anti-counterfeiting mark. It utilizes the property of the shape-remembered memory of a high-molecular polymer having a shape memory effect to realize anti-counterfeiting on a commodity. Their common feature is that the polymer materials should be cross-linked or chemically cross-linked. There are many process steps for irradiation and cross-linking, and chemical cross-linking requires strict production processes and is prone to waste. Some polymer materials have shape memory properties through irradiation cross-linking or chemical cross-linking, and some polymer materials have shape memory properties without irradiation cross-linking or chemical cross-linking.
  • the object of the present invention is to provide a method for fabricating a shape memory anti-counterfeit label which is simpler in process and can be obtained by irradiating cross-linking or chemical cross-linking to obtain a polymer shape memory anti-counterfeiting mark.
  • the object of the present invention can be attained by the following measures: a method for fabricating a shape memory anti-counterfeit mark, which is characterized in that a polymer material having shape memory properties without undergoing irradiation cross-linking or chemical cross-linking is directly extruded.
  • the machine is extruded into a sheet or injection molded by an injection molding machine, and the extruded sheet may be a flat sheet or a sheet having a concave-convex pattern or a character on the surface, and then heating the sheet to its glass transition temperature.
  • each piece is hidden Containing a pattern or a set of characters, when these pieces are reheated above their glass transition temperature and below the melting point, they return to the state of extrusion.
  • the object of the present invention can also be achieved by the following measures: in the extrusion or injection molding process, the embossing roll of the sheet extrusion unit can be used to form a concave-convex pattern or a letter on the surface of the extruded sheet, or use a mold.
  • the injection molding machine can also be used to inject a polymer material having shape memory property without irradiation crosslinking or chemical crosslinking into a semi-finished product of a certain shape, and then heating the semi-finished product to a temperature above the glass transition temperature and below the melting point, and then The shape of the semi-finished product is deformed and the deformation is retained. When the deformed products are reheated above their glass transition temperature and below the melting point, they are restored to the state at the time of injection molding.
  • a polymer material having shape memory properties without irradiation crosslinking or chemical crosslinking is extruded into a planar sheet, the sheet is cut to a desired size according to the size of the hot pressing mold, and then the sheet is placed in a heat In the press mold, a concave-convex pattern or a character is thermally pressed on the surface of the sheet.
  • the extruder can adopt a single-screw sheet extrusion unit, and the surface of the roller of the single-screw sheet extrusion unit is set with a plurality of identical patterns or groups of the same characters, and the same patterns or characters have each other. At a certain distance, these same patterns or words are convex or concave.
  • Polymer materials having shape memory properties without irradiation crosslinking or chemical crosslinking may be polylactic acid, polyester, polyvinyl chloride, polypropylene, ethylene-vinyl acetate polymer, norbornene, thermoplastic polyurethane elastomer , polyether ester thermoplastic elastomer, styrene thermoplastic elastomer.
  • the printing material forming the pattern or the text may be a temperature change ink.
  • Polymer materials having shape memory properties without irradiation crosslinking or chemical crosslinking can also be molded by a molding machine.
  • the surface of the roll of the sheet extrusion unit is set with a plurality of identical patterns or groups of identical characters, and the same pattern or text has a certain distance from each other, and the same pattern Or the text is convex or concave.
  • a thermoplastic polyurethane elastomer or the like having a shape memory property is extruded into a sheet having a concave-convex pattern or a character corresponding to a roll, and the sheet has a thickness of 0.1 to 2 mm, preferably 0.3 to 0.5 mm.
  • the sheet is heated to a temperature above the glass transition temperature and below the melting point, and then the concave and convex pattern or the text on the heated sheet is flattened by a two-roll or three-roll calender, and then printed using an irreversible temperature-changing ink.
  • the color change temperature is similar to the deformation temperature of the polymer shape memory material, and is colored at normal temperature, and becomes colorless after reaching a certain temperature, and then the sheet is cut into small pieces, each piece implies a pattern. Or a set of text. Put these small pieces on the goods. When you need to check the authenticity of the goods, put the pieces into boiling water or otherwise heat them above the glass transition temperature of the thermoplastic polyurethane elastomer. Below the melting point, the color of these pieces will be It changes and shows the pattern or text on the roller, which acts as an anti-counterfeiting.
  • a styrene-based thermoplastic elastomer is directly formed on the surface of the injection molded product by an injection molding machine and a mold to form a concave-convex pattern (text).
  • the injection molded product is heated to a temperature above the glass transition temperature and below the melting point, and the pattern (text) formed on the surface is pressed into other patterns (text) or pressed into a flat surface, and then the products are reheated to their vitrification. Above the temperature, below the melting point, the concave-convex pattern (text) formed by injection molding will reappear.
  • the polylactic acid is extruded into a flat sheet, the sheet is cut to the required size according to the size of the hot pressing mold, and then the sheet is placed in a hot pressing mold at a temperature of 60-65 ° C (polylactic acid glass) The temperature was 55 ° C), and the surface of the sheet was hot pressed out of the concave-convex pattern (text).
  • the sheet having the concavo-convex pattern (text) has a thickness of 0.1 to 2.0 mm.
  • the planar sheet has a thickness of 0.1 to 2.0 mm.
  • the uneven pattern (character) on the sheet or the film was punched into another pattern (character) by a punch and a die.
  • the sheet is then cut into small pieces, each of which implies a pattern or a set of text. Put these small pieces on the goods.
  • you need to check the authenticity of the goods put the small pieces into the boiling water or heat them in other ways, then these small pieces will show the pattern or text on the roller, which will play the role of anti-counterfeiting.
  • the above-mentioned extruded semi-finished product with pattern or text is made into a specific color (such as blue), and then subjected to overmolding, and then the semi-finished product is used by using irreversible temperature-changing ink.
  • the pattern or text portion formed after the overmolding is printed into another color (such as red), and the temperature change temperature of the temperature change ink is similar to the deformation temperature of the polymer shape memory material, and is colored at normal temperature to reach a certain temperature. After that, it becomes colorless. In this way, the shape memory anti-counterfeit mark with temperature-changing ink is made.
  • the anti-counterfeit mark When the anti-counterfeit mark is heated to a certain temperature, not only the pattern or the text on the anti-counterfeit mark will change three-dimensionally, And the color has changed. It is also possible to print the pattern or text on the semi-blue finished product in red with a non-temperature-changing ink, and then print the green color together with the pattern or other parts of the text with the temperature-changing ink.
  • the shape memory polyurethane is injection molded into a cylinder by using an injection molding machine and a mold, and then the cylinder is heated to a temperature above the glass transition temperature of the shape memory polyurethane, below the melting point, and then the cylinder is pressed into a wafer, and the wafers are reheated. When the shape memory polyurethane is above the glass transition temperature and below the melting point, they return to the cylinder during injection molding.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Printing Methods (AREA)

Description

一种形状记忆防伪标识的制作方法 技术领域
本发明涉及一种制作方法，特别是一种形状记忆防伪标识的制作方法。
背景技术
中国专利申请（专利申请号201010239475.8）中记载了一份名称为“一种形状记忆防伪标识的制作方法” ，它利用具有形状记忆效应的高分子聚合物对其赋形的记忆这一特性，可实现在商品上的防伪。它们的共同特点是，都要把高分子材料进行辐照交联或化学交联。辐照交联的工艺步骤较多，而化学交联对生产工艺要求比较严苛，容易出现废品。一些高分子材料要经过辐照交联或化学交联才具有形状记忆性能，而某些高分子材料不经过辐照交联或化学交联也具有形状记忆性能。
发明内容
本发明的目的在于提供一种工艺更加简单，不需要进行辐照交联或者化学交联而能制得高分子形状记忆防伪标识的形状记忆防伪标识的制作方法。
本发明的目的可以通过以下措施来达到：一种形状记忆防伪标识的制作方法，其特征在于：将不需经过辐照交联或化学交联而具有形状记忆性能的高分子材料直接用挤出机挤成片材、或用注塑机注塑成型，挤出成型的片材可以是平面片材，也可以是表面形成凹凸图案或文字的片材，再把上述的片材加热至其玻璃化温度以上，熔点以下，并在平面片材上压制出图案或文字，或把已形成凹凸图案或文字的片材压成平面或其它图案、文字，再把片材裁成小片，每一小片都隐含了一个图案或一组文字，当把这些小片再加热到它们的玻璃化温度以上、熔点以下时，它们就会恢复到挤出成型时的状态。
本发明的目的还可以通过以下措施来达到：所述的挤出或注塑成型过程中，可利用片材挤出机组的压花辊在挤出的片材表面形成凹凸图案或文字，或利用模具直接在注塑产品的表面形成凹凸图案或文字，再把上述片材加热至其玻璃化温度以上、熔点以下，然后用两辊或三辊压延机把加热的片材上的凹凸图案或文字压制成其它的图案或文字，或压成平面，再把片材裁成小片，每一小片都隐含了一个图案或一组文字即可。还可用注塑机把不需经过辐照交联或化学交联而具有形状记忆性能的高分子材料注塑成某一型状的半成品，再把这个半成品加热至其玻璃化温度以上，熔点以下，然后把半成品的形状予以变形，并保留此变形，当把这些变形后的产品再加热到它们的玻璃化温度以上、熔点以下时，它们就会恢复到注塑成型时的状态。将不需经过辐照交联或化学交联而具有形状记忆性能的高分子材料挤成平面片材，将片材按热压模具的大小裁成所需的规格，然后将片材放入热压模具中，在片材的表面热压出凹凸图案或文字。所述的挤出机可采用单螺杆片材挤出机组，单螺杆片材挤出机组的辊筒表面设定了多个相同的图案或多组相同的文字，这些相同的图案或文字彼此有一定的距离，这些相同的图案或文字是凸出或凹进的。把上述表面具有凹凸图案或文字的片材在常温的情况下，用冲床和模具把片材的凹凸图案或文字冲压成其它的图案或文字。所述平面片材的厚度为0.1—2.0mm，所述具有凹凸有致图案的板材的厚度为0.1—2.0mm。不需经过辐照交联或化学交联而具有形状记忆性能的高分子材料可采用聚乳酸、聚酯、聚氯乙烯、聚丙烯、乙烯-醋酸乙烯聚合物、降冰片烯、热塑性聚氨酯弹性体、聚醚酯热塑性弹性体、苯乙烯类热塑性弹性体。形成图案或文字的印刷材料可采用温变油墨。不需经过辐照交联或化学交联而具有形状记忆性能的高分子材料也可通过模压机模压成型。
本发明相比现有技术具有如下优点：
1、不需要进行交联，减少了工艺环节，简化了控制生产过程，节省了成本。
2、可以使用温变油墨来增强防伪效果，既可以使用可逆温变油墨，也可以使用不可逆温变油墨；这样，就把颜色变化的平面效果与三维立体的形状记忆变化效果相结合在一起了，产生更为明显的视觉感受。
具体实施方式
本发明下面将结合实施例作进一步详述：
实施例一
利用单螺杆片材挤出机组，该片材挤出机组的辊筒表面设定了多个相同的图案或多组相同的文字，这些相同的图案或文字彼此有一定的距离，这些相同的图案或文字是凸出或凹进的。将具有形状记忆性能的热塑性聚氨酯弹性体等挤成表面具有与辊筒对应的凹凸图案或文字的片材，片材厚度为0.1—2mm，以0.3-0.5mm为好。再把上述片材加热玻璃化温度以上，熔点以下，，然后用二辊或三辊压延机把加热的片材上的凹凸图案或文字压平，再使用不可逆温变油墨印刷，该温变油墨的变色温度与高分子形状记忆材料的形变温度相近，并且常温下是有色的，而达到一定温度后变成无色的，然后再把片材裁成小片，每一小片都隐含了一个图案或一组文字。把这些小片贴在商品上，当需要检验商品的真伪时，把小片放进开水中或用其它方式加热到热塑性聚氨酯弹性体玻璃化温度以上，熔点以下，则这些小片的颜色就会就会变化，并且显现出辊筒上的图案或文字，起到防伪的作用。
实施例二
将苯乙烯类热塑性弹性体，用注塑机和模具直接在注塑产品的表面形成凹凸图案（文字）。再把注塑产品加热至其玻璃化温度以上、熔点以下，将其表面已经形成的图案（文字），压制成其它的图案（文字）、或者压成平面，再把这些产品再加热至其玻璃化温度以上，熔点以下时，注塑形成的凹凸图案（文字）就会重新显现出来。
实施例三
将聚乳酸挤成平面片材，将片材按热压模具的大小裁成所需的规格，然后将片材放入热压模具中，在60-65℃的温度范围内（聚乳酸的玻璃化温度为55℃），把片材的表面热压出凹凸图案（文字）。所述具有凹凸图案（文字）的片材的厚度为0.1—2.0mm。所述平面片材的厚度为0.1—2.0mm。当需要检验商品的真伪时，把小片放进开水中或用其它方式加热到65℃左右的温度时，则这些小片上的凹凸图案（文字）就会消失，而恢复成平面，起到防伪的作用。
实施例四
把上述实施例一及实施例二的表面具有凹凸图案（文字）的片材在常温的情况下，用冲床和模具把板材或薄膜上的凹凸图案（文字）冲压成其它的图案（文字）。再把片材裁成小片，每一小片都隐含了一个图案或一组文字。把这些小片贴在商品上，当需要检验商品的真伪时，把小片放进开水中或用其它方式加热，则这些小片就会显现出辊筒上的图案或文字，起到防伪的作用。
实施例五
如把上述带有图案或文字的挤出的片材半成品（或其它成型方式成型的半成品）制成特定的颜色（比如蓝色），然后进行二次成型，再使用不可逆温变油墨将半成品上的二次成型后形成的图案或文字部分印刷成另外的颜色（比如红色），该温变油墨的变色温度与高分子形状记忆材料的形变温度相近，并且常温下是有色的，而达到一定温度后变成无色的，这样，就制成了带有温变油墨的形状记忆防伪标识，当把此防伪标识加热到一定温度后，不但防伪标识上的图案或文字会发生三维立体的变化，而且颜色也发生了变化。也可以将半蓝色成品上的图案或文字用非温变油墨印刷成红色，再以温变油墨把连同图案或文字的其它部分全部印刷成绿色，
实施例六
利用注塑机和模具把形状记忆聚氨酯注塑成一个圆柱体，然后把这个圆柱体加热至形状记忆聚氨酯的玻璃化温度以上，熔点以下，再把圆柱体压成圆片，当把这些圆片再加热到形状记忆聚氨酯的玻璃化温度以上、熔点以下时，它们就会恢复到注塑成型时的圆柱体。

Claims (10)

  1. 一种形状记忆防伪标识的制作方法，其特征在于：将不需经过辐照交联或化学交联而具有形状记忆性能的高分子材料直接用挤出机挤成片材、或用注塑机注塑成型，挤出成型的片材可以是平面片材，也可以是表面形成凹凸图案或文字的片材，再把上述的片材加热至其玻璃化温度以上，熔点以下，并在平面片材上压制出图案或文字，或把已形成凹凸图案或文字的片材压成平面或其它图案、文字，再把片材裁成小片，每一小片都隐含了一个图案或一组文字，当把这些小片再加热到它们的玻璃化温度以上、熔点以下时，它们就会恢复到挤出成型时的状态。
  2. 根据权利要求1所述的一种形状记忆防伪标识的制作方法，其特征在于：所述的挤出或注塑成型过程中，可利用片材挤出机组的压花辊在挤出的片材表面形成凹凸图案或文字，或利用模具直接在注塑产品的表面形成凹凸图案或文字，再把上述片材加热至其玻璃化温度以上、熔点以下，然后用两辊或三辊压延机把加热的片材上的凹凸图案或文字压制成其它的图案或文字，或压成平面，再把片材裁成小片，每一小片都隐含了一个图案或一组文字即可。
  3. 根据权利要求1所述的一种形状记忆防伪标识的制作方法，其特征在于：还可用注塑机把不需经过辐照交联或化学交联而具有形状记忆性能的高分子材料注塑成某一型状的半成品，再把这个半成品加热至其玻璃化温度以上，熔点以下，然后把半成品的形状予以变形，并保留此变形，当把这些变形后的产品再加热到它们的玻璃化温度以上、熔点以下时，它们就会恢复到注塑成型时的状态。
  4. 根据权利要求1所述的一种形状记忆防伪标识的制作方法，其特征在于：将不需经过辐照交联或化学交联而具有形状记忆性能的高分子材料挤成平面片材，将片材按热压模具的大小裁成所需的规格，然后将片材放入热压模具中，在片材的表面热压出凹凸图案或文字。
  5. 根据权利要求1或2所述的一种形状记忆防伪标识的制作方法，其特征在于：所述的挤出机可采用单螺杆片材挤出机组，单螺杆片材挤出机组的辊筒表面设定了多个相同的图案或多组相同的文字，这些相同的图案或文字彼此有一定的距离，这些相同的图案或文字是凸出或凹进的。
  6. 根据权利要求1或2所述的一种形状记忆防伪标识的制作方法，其特征在于：把上述表面具有凹凸图案或文字的片材在常温的情况下，用冲床和模具把片材的凹凸图案或文字冲压成其它的图案或文字。
  7. 根据权利要求2或4所述的一种形状记忆防伪标识的制作方法，其特征在于：所述平面片材的厚度为0.1—2.0mm，所述具有凹凸有致图案的板材的厚度为0.1—2.0mm。
  8. 根据权利要求所述的一种形状记忆防伪标识的制作方法，其特征在于：不需经过辐照交联或化学交联而具有形状记忆性能的高分子材料可采用聚乳酸、聚酯、聚氯乙烯、聚丙烯、乙烯-醋酸乙烯聚合物、降冰片烯、热塑性聚氨酯弹性体、聚醚酯热塑性弹性体、苯乙烯类热塑性弹性体。
  9. 根据权利要求所述的一种形状记忆防伪标识的制作方法，其特征在于：形成图案或文字的印刷材料可采用温变油墨。
  10. 根据权利要求所述的一种形状记忆防伪标识的制作方法，其特征在于：不需经过辐照交联或化学交联而具有形状记忆性能的高分子材料也可通过模压机模压成型。
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