CN112724861B - Production method of TPU polyurethane and mucosa combined finished product - Google Patents
Production method of TPU polyurethane and mucosa combined finished product Download PDFInfo
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- CN112724861B CN112724861B CN202110065444.3A CN202110065444A CN112724861B CN 112724861 B CN112724861 B CN 112724861B CN 202110065444 A CN202110065444 A CN 202110065444A CN 112724861 B CN112724861 B CN 112724861B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/29—Laminated material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
- B41M5/41—Base layers supports or substrates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
- B41M5/42—Intermediate, backcoat, or covering layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
- B41M5/42—Intermediate, backcoat, or covering layers
- B41M5/44—Intermediate, backcoat, or covering layers characterised by the macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/06—Polyurethanes from polyesters
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/50—Adhesives in the form of films or foils characterised by a primer layer between the carrier and the adhesive
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2467/00—Presence of polyester
- C09J2467/006—Presence of polyester in the substrate
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2475/00—Presence of polyurethane
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- Organic Chemistry (AREA)
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- Optics & Photonics (AREA)
- Inorganic Chemistry (AREA)
- Decoration By Transfer Pictures (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a production method of a finished product combining TPU polyurethane and a mucous membrane, relating to the technical field of manufacturing of lettering membranes; the problem that the modulated color cannot be directly printed on a TPU injection mold is solved; the method specifically comprises the following steps: confirming the information of the finished product material, and drawing a product pattern; manufacturing a forming mold according to the pattern; preparing a mucosa according to the raw material information and performing laser marking, die cutting and high-frequency die cutting; combining the manufactured adhesive film with a forming mold by using hot melting to carry out TPU polyurethane gum bonding; removing the residual colloid on the product, and drying and shaping the product to obtain a final finished product; the raw material information comprises the material and the raw material of the mucosa, and the mucosa is divided into a base material layer, a separation layer, a transfer printing layer and an adhesive layer. The invention utilizes the hot melting technology to combine the TPU polyurethane gum on the lettering film and the forming mould, does not directly utilize the mould for printing, and solves the problem that some cold door tones cannot be printed on the TPU injection moulding through the combination of the two.
Description
Technical Field
The invention relates to the technical field of manufacturing of lettering films, in particular to a production method of a finished product combining TPU polyurethane and a mucous membrane.
Background
The TPU polyurethane is a thermoplastic polyurethane elastomer which is also called thermoplastic polyurethane rubber and is commonly called injection molding, the thermoplastic polyurethane elastomer is an elastomer which can be plasticized by heating and can be dissolved by a solvent, has good processing performance, is widely applied to a plurality of fields such as shoe materials, cables, clothes, automobiles, medical and health products, pipes, films, sheets and the like, and is suitable for medium-sized and small-sized parts which are produced in large scale. The adhesive film is a carving film with hot melt adhesive on the back, also called transfer film, the carving film is a heat transfer film which needs to be cut/carved in the heat transfer process, the carving film is a TPU elastic carving film, a glitter carving film, a laser carving film, a metal-like carving film and the like, the existing transfer film is subjected to transfer printing through vacuum adsorption and high temperature of 200-240 ℃, or is subjected to transfer printing under high temperature and high pressure, for example, the phenomena of ink gathering and infiltration are easy to occur when water-based pigment ink is printed on a common PET film coated with a parting agent, and the effect is not ideal.
Through retrieval, the Chinese patent with the application number of CN202010053966.7 discloses a lettering film and a preparation method thereof, wherein the lettering film comprises a release layer, an organic silicon layer and a TPU layer which are sequentially laminated; the preparation method of the lettering film comprises the following steps: coating the material of the organic silicon layer on the release layer, then compounding the material of the TPU layer and the material of the organic silicon layer, and baking to obtain the lettering film. The lettering film and the preparation method thereof in the above patent have the following disadvantages: when transfer of a colored film is required, such as when an additional color modulation is required, direct printing on the TPU injection mold is not possible.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a production method of a finished product combining TPU polyurethane and a mucous membrane.
In order to achieve the purpose, the invention adopts the following technical scheme:
a production method of a finished product combining TPU polyurethane and a mucous membrane comprises the following steps:
s1: confirming the information of the finished product material, and drawing a product pattern;
s2: manufacturing a forming mold according to the pattern;
s3: preparing a mucosa according to the raw material information and marking by laser;
s4: combining the manufactured adhesive film with a forming mold by using hot melting to carry out TPU polyurethane gum bonding;
s5: removing the residual colloid on the product, and drying and shaping the product to obtain a final finished product;
the raw material information comprises the material and the raw material of the mucosa, and the mucosa is divided into a substrate layer, a separation layer, a transfer printing layer and an adhesive layer;
the transfer printing layer is formed by mixing 23: 42: 0.6 of pigment, solvent and additive;
the preparation method of the adhesive layer comprises the following steps:
s51: adding diphenylmethane-4, 4' diisocyanate, nano aluminum silicate and a catalyst into polybutylene adipate with the moisture content of less than 12%;
s52: stirring and mixing the mixture, and reacting the mixture for 3 hours at the temperature of 85 ℃;
s53: adding a humidifying agent, and continuously reacting for 1h to obtain the compound;
the method for preparing the mucosa comprises the following steps:
s101: covering the separation layer on the substrate layer in a hot pressing manner;
s102: coating the transfer printing layer on the surface of the separation layer, and drying at 80-170 ℃ to ensure that the ink layer is dried thoroughly;
s103: then uniformly coating an adhesive layer, and ensuring that the adhesive layer is dried;
s104: drying the finished product in a drying tunnel at 85-90 ℃, cooling and rolling.
Preferably: the finished product material information comprises the color, pattern, size and thickness requirements of the product manufacture.
Preferably: the thickness of substrate layer is 25 ~ 50 mu m, and the thickness of rendition layer is 1.5 ~ 2.5 mu m, and the thickness of gluing layer is 4 ~ 5.5 mu m.
Preferably: the substrate layer is one of polyethylene, polypropylene, polystyrene, polymethyl methacrylate, polyvinyl chloride, polycarbonate, polyurethane and polyethylene terephthalate.
Preferably: the separation layer is one of a PE release film, a PET release film, an OPP release film, a PC release film, a PMMA release film, a BOPP release film, a TPX release film, a PVC release film or a PTFE release film.
Preferably: the pigment is an inorganic pigment or an organic pigment; the solvent is one of butanone, toluene, xylene and cyclohexanone; the additive is one of polyethylene wax, paraffin, cellulose acetate, polyurethane and acrylic.
Preferably: the temperature for combining the TPU polyurethane back adhesive by hot melting is 160-220 ℃, and the thickness of the melt adhesive is 75-100 mu m; and in the step of drying and shaping the product, the drying temperature is 95-110 ℃, and the drying treatment time is 2 hours.
Preferably: the production method is replaced by the following steps:
s1: confirming the information of the finished product material, and drawing a product pattern;
s2: manufacturing a forming mold according to the pattern;
s3: preparing a mucosa according to the raw material information and marking by laser;
s4: the manufactured mucosa and the forming die are combined into a single body by hot melting of TPU polyurethane;
s5: placing the single unit in a concave die, then placing the single unit below a high-frequency machine head, covering a layer of TPU hot melt adhesive on the single unit, and fusing the single unit through high-temperature current;
s6: and removing the residual colloid on the product by laser cutting, and drying and shaping the product to obtain a final finished product.
The invention has the beneficial effects that:
1. the invention confirms the pattern to be made and adjusts the color tone of the adhesive film, utilizes the hot melting technology to carry out TPU polyurethane gum combination on the lettering film and the forming mould, does not directly utilize the mould to print, and solves the problem that some cold door color tones cannot be printed on TPU injection moulding through the combination of the two.
2. The laser marking method for the lettering film has the advantages that the laser marking is carried out on the lettering film, and after the laser marking method is combined with the die in a melting mode, compared with the traditional transfer printing method, the laser marking method is capable of effectively improving production efficiency, simple in operation, labor-saving, controllable in thickness and beneficial to popularization.
3. The adhesive layer has good wetting property when being adhered with the transfer printing layer, so that the color fastness is stable, the color of a transfer printing body is bright, the adhesive layer has good adhesion with different materials such as metal, glass, fabric and the like, and the transfer printing layer can be firmly adhered on a printing stock.
Drawings
FIG. 1 is a schematic flow chart of the production process of the TPU polyurethane and the adhesive film combined finished product according to the invention in example 1 and example 2;
FIG. 2 is a schematic flow chart of an embodiment 3 of the production method of the TPU polyurethane and mucosa combined finished product provided by the invention.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.
Example 1:
a method for producing a finished product of TPU polyurethane combined with a mucous membrane, as shown in fig. 1, comprising the following steps:
s1: confirming the information of the finished product material, and drawing a product pattern;
s2: manufacturing a forming mold according to the pattern;
s3: preparing a mucosa according to the raw material information and marking by laser;
s4: combining the manufactured adhesive film with a forming mold by using hot melting to carry out TPU polyurethane gum bonding;
s5: and removing the residual colloid on the product, and drying and shaping the product to obtain a final finished product.
The information of the finished product material comprises the requirements of the color, pattern, size, thickness and the like of the manufactured product.
The raw material information comprises the material and the raw material of the adhesive film, preferably, in this embodiment, the adhesive film is divided into a substrate layer, a separation layer, a transfer layer and an adhesive layer, the thickness of the substrate layer is 25-50 μm, the thickness of the transfer layer is 1.5-2.5 μm, and the thickness of the adhesive layer is 4-5.5 μm.
Further, the substrate layer is one of polyethylene, polypropylene, polystyrene, polymethyl methacrylate, polyvinyl chloride, polycarbonate, polyurethane and polyethylene terephthalate, and preferably, in this embodiment, the substrate layer is polyethylene terephthalate, and is a carrier coated with a release layer, a transfer layer and an adhesive layer.
Further, the separation layer is one of a PE release film, a PET release film, an OPP release film, a PC release film, a PMMA release film, a BOPP release film, a TPX release film, a PVC release film or a PTFE release film.
Further, the transfer layer is formed by mixing 23: 42: 0.6 of pigment, solvent and additive, wherein the pigment is inorganic pigment or organic pigment; the solvent is one of butanone, toluene, xylene and cyclohexanone; the additive is one of polyethylene wax, paraffin, cellulose acetate, polyurethane and acrylic.
Further, the preparation method of the adhesive layer comprises the following steps:
s51: adding diphenylmethane-4, 4' diisocyanate, nano aluminum silicate and a catalyst into polybutylene adipate with the moisture content of less than 12%;
s52: stirring and mixing the mixture, and reacting the mixture for 3 hours at the temperature of 85 ℃;
s53: adding a wetting agent, and continuously reacting for 1h to obtain the adhesive.
The method for preparing the mucosa comprises the following steps:
s101: covering the separation layer on the substrate layer in a hot pressing manner;
s102: coating the transfer printing layer on the surface of the separation layer, and drying at 80-170 ℃ to ensure that the ink layer is dried thoroughly;
s103: then uniformly coating an adhesive layer, and ensuring that the adhesive layer is dried;
s104: drying the finished product in a drying tunnel at 85-90 ℃, cooling and rolling.
The temperature for combining the TPU polyurethane back adhesive by hot melting is 160-220 ℃, and the thickness is 75-100 mu m.
And in the step of drying and shaping the product, the drying temperature is 95-110 ℃, and the drying treatment time is 2 hours.
This embodiment is when using, confirm the pattern that needs the preparation and allocate the mucosa tone, utilize hot melt technique to carry out TPU polyurethane gum combination to membrane of carving characters and forming die, directly not utilize the mould printing, some cold door tones have been solved through both combinations and the problem that can't be printed on TPU moulds plastics, carry out laser marking to the membrane of carving characters, it combines the back with the mould melting, compare traditional rendition method and effectively improve production efficiency, moreover, the operation is simple, and the manpower is saved, the thickness is controllable, do benefit to the popularization, there is fine nature when gluing layer and rendition layer are laminated, make its colour fastness stable, the transfer printing body colour is bright, and with metal, glass, there is fine cohesiveness between the fabric etc. different materials, can firmly bond the rendition layer on the stock.
Example 2:
a method for producing a finished product of TPU polyurethane combined with a mucous membrane, as shown in fig. 1, comprising the following steps:
s1: confirming the information of the finished product material, and drawing a product pattern;
s2: manufacturing a forming mold according to the pattern;
s3: preparing a mucosa according to the raw material information and marking by laser;
s4: combining the manufactured adhesive film with a forming mold by using hot melting to carry out TPU polyurethane gum bonding;
s5: and removing the residual colloid on the product, and drying and shaping the product to obtain a final finished product.
The information of the finished product material comprises the requirements of the color, pattern, size, thickness and the like of the manufactured product.
The raw material information comprises the material and the raw material of the adhesive film, preferably, in this embodiment, the adhesive film is divided into a substrate layer, a separation layer, a transfer layer and an adhesive layer, the thickness of the substrate layer is 25-50 μm, the thickness of the transfer layer is 1.5-2.5 μm, and the thickness of the adhesive layer is 4-5.5 μm.
Further, the substrate layer is one of polyethylene, polypropylene, polystyrene, polymethyl methacrylate, polyvinyl chloride, polycarbonate, polyurethane and polyethylene terephthalate, and preferably, in this embodiment, the substrate layer is polyurethane, and is a carrier coated with a release layer, a transfer layer and an adhesive layer.
Further, the separation layer is one of a PE release film, a PET release film, an OPP release film, a PC release film, a PMMA release film, a BOPP release film, a TPX release film, a PVC release film or a PTFE release film.
Further, the transfer printing layer is formed by mixing 20: 40: 0.8 of pigment, solvent and additive, wherein the pigment is inorganic pigment or organic pigment; the solvent is one of butanone, toluene, xylene and cyclohexanone; the additive is one of polyethylene wax, paraffin, cellulose acetate, polyurethane and acrylic.
Further, the preparation method of the adhesive layer comprises the following steps:
s51: adding diphenylmethane-4, 4' diisocyanate, nano aluminum silicate and a catalyst into polybutylene adipate with the moisture content of less than 15%;
s52: stirring and mixing the mixture, and reacting the mixture for 3 hours at the temperature of 85 ℃;
s53: adding a wetting agent, and continuously reacting for 1h to obtain the adhesive.
The method for preparing the mucosa comprises the following steps:
s101: covering the separation layer on the substrate layer in a hot pressing manner;
s102: coating the transfer printing layer on the surface of the separation layer, and drying at 80-170 ℃ to ensure that the ink layer is dried thoroughly;
s103: then uniformly coating an adhesive layer and ensuring the adhesive layer to be dried;
s104: drying the finished product in a drying tunnel at 85-90 ℃, cooling and rolling.
The temperature for combining the TPU polyurethane back adhesive by hot melting is 160-220 ℃, and the thickness is 75-100 mu m.
And in the step of drying and shaping the product, the drying temperature is 95-110 ℃, and the drying treatment time is 1 h.
Example 3:
a method for producing a finished product of TPU polyurethane combined with a mucous membrane, as shown in fig. 2, comprising the following steps:
s1: confirming the information of the finished product material, and drawing a product pattern;
s2: manufacturing a forming mold according to the pattern;
s3: preparing a mucosa according to the raw material information and marking by laser;
s4: the manufactured mucosa and the forming die are combined into a single body by hot melting of TPU polyurethane;
s5: placing the single unit in a concave die, then placing the single unit below a high-frequency machine head, covering a layer of TPU hot melt adhesive on the single unit, and fusing the single unit through high-temperature current;
s6: and removing the colloid left on the product by laser cutting, and drying and shaping the product to obtain a final finished product.
The information of the finished product material comprises the requirements of the color, pattern, size, thickness and the like of the manufactured product.
The raw material information comprises the material and the raw material of the adhesive film, preferably, in this embodiment, the adhesive film is divided into a substrate layer, a separation layer, a transfer layer and an adhesive layer, the thickness of the substrate layer is 25-50 μm, the thickness of the transfer layer is 1.5-2.5 μm, and the thickness of the adhesive layer is 4-5.5 μm.
Further, the substrate layer is one of polyethylene, polypropylene, polystyrene, polymethyl methacrylate, polyvinyl chloride, polycarbonate, polyurethane and polyethylene terephthalate, and preferably, in this embodiment, the substrate layer is polyethylene terephthalate, and is a carrier coated with a release layer, a transfer layer and an adhesive layer.
Further, the separation layer is one of a PE release film, a PET release film, an OPP release film, a PC release film, a PMMA release film, a BOPP release film, a TPX release film, a PVC release film or a PTFE release film.
Further, the transfer layer is formed by mixing 23: 42: 0.6 of pigment, solvent and additive, wherein the pigment is inorganic pigment or organic pigment; the solvent is one of butanone, toluene, xylene and cyclohexanone; the additive is one of polyethylene wax, paraffin, cellulose acetate, polyurethane and acrylic.
Further, the preparation method of the adhesive layer comprises the following steps:
s51: adding diphenylmethane-4, 4' diisocyanate, nano aluminum silicate and a catalyst into polybutylene adipate with the moisture content of less than 12%;
s52: stirring and mixing the mixture, and reacting the mixture for 3 hours at the temperature of 85 ℃;
s53: and adding a humidifier to continue reacting for 1h to obtain the adhesive.
The method for preparing the mucosa comprises the following steps:
s101: covering the separation layer on the substrate layer in a hot pressing manner;
s102: coating the transfer printing layer on the surface of the separation layer, and drying at 80-170 ℃ to ensure that the ink layer is dried thoroughly;
s103: then uniformly coating an adhesive layer and ensuring the adhesive layer to be dried;
s104: drying the finished product in a drying tunnel at 85-90 ℃, cooling and rolling.
The temperature of the high-temperature current fusion is 180-230 ℃.
And in the step of drying and shaping the product, the drying temperature is 95-110 ℃, and the drying treatment time is 2 hours.
The following are the parameter comparisons for examples 1-3 and commercial lettering film preparation:
| / | fineness of transfer printing | Flexural Strength (MPa) | Transfer effect | Color fastness |
| Example 1 | Clear, non-seepage, non-ink-gathering | 92 | No residue in the separation layer | 5 |
| Example 2 | Clear, non-seepage, non-ink-gathering | 90 | No residue in the separation layer | 5 |
| Example 3 | Clear, non-seepage, non-ink-gathering | 91 | No residue in the separation layer | 5 |
| Film for carving characters on market | Clear, permeable and non-ink-gathering | 82 | No obvious residue in the separation layer | 4 |
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. A production method of a finished product combining TPU polyurethane and a mucous membrane is characterized by comprising the following steps:
s1: confirming the information of the finished product material, and drawing a product pattern;
s2: manufacturing a forming mold according to the pattern;
s3: preparing a mucosa according to the raw material information and marking by laser;
s4: combining the manufactured adhesive film with a forming mold by using hot melting to carry out TPU polyurethane gum bonding;
s5: removing the residual colloid on the product, and drying and shaping the product to obtain a final finished product;
the raw material information comprises the material and the raw material of the mucosa, and the mucosa is divided into a substrate layer, a separation layer, a transfer printing layer and an adhesive layer;
the transfer printing layer is formed by mixing 23: 42: 0.6 of pigment, solvent and additive;
the preparation method of the adhesive layer comprises the following steps:
s51: adding diphenylmethane-4, 4' diisocyanate, nano aluminum silicate and a catalyst into polybutylene adipate with the moisture content of less than 12%;
s52: stirring and mixing the mixture, and reacting the mixture for 3 hours at the temperature of 85 ℃;
s53: adding a humidifying agent, and continuously reacting for 1h to obtain the compound;
the method for preparing the mucosa comprises the following steps:
s101: covering the separation layer on the substrate layer in a hot pressing manner;
s102: coating the transfer printing layer on the surface of the separation layer, and drying at 80-170 ℃ to ensure that the ink layer is dried thoroughly;
s103: then uniformly coating an adhesive layer, and ensuring that the adhesive layer is dried;
s104: drying the finished product in a drying tunnel at 85-90 ℃, cooling and rolling.
2. The method of claim 1, wherein the information on the material of the manufactured product includes the color, pattern, size, and thickness requirements of the manufactured product.
3. The method for producing the finished product of TPU polyurethane combined with adhesive film as claimed in claim 1, wherein the thickness of the substrate layer is 25 to 50 μm, the thickness of the transfer layer is 1.5 to 2.5 μm, and the thickness of the adhesive layer is 4 to 5.5 μm.
4. The method of claim 3, wherein the substrate layer is one of polyethylene, polypropylene, polystyrene, polymethyl methacrylate, polyvinyl chloride, polycarbonate, polyurethane, and polyethylene terephthalate.
5. The method of claim 4, wherein the release layer is one of a PE release film, a PET release film, an OPP release film, a PC release film, a PMMA release film, a BOPP release film, a TPX release film, a PVC release film, or a PTFE release film.
6. The process for producing a finished product of TPU polyurethane combined with adhesive film according to claim 5, wherein the colorant is an inorganic pigment or an organic pigment; the solvent is one of butanone, toluene, xylene and cyclohexanone; the additive is one of polyethylene wax, paraffin, cellulose acetate, polyurethane and acrylic.
7. The production method of the finished product combining the TPU polyurethane and the adhesive film as claimed in claim 2, wherein the temperature for the adhesive bonding of the TPU polyurethane by hot melting is 160-220 ℃, and the thickness of the molten adhesive is 75-100 μm; and in the step of drying and shaping the product, the drying temperature is 95-110 ℃, and the drying treatment time is 2 hours.
8. The process for producing a finished product combining TPU polyurethane and adhesive film according to claim 1, characterized in that the production process is replaced by the following steps:
s1: confirming the information of the finished product material, and drawing a product pattern;
s2: manufacturing a forming mold according to the pattern;
s3: preparing a mucosa according to the raw material information and marking by laser;
s4: the manufactured mucosa and the forming die are combined into a single body by hot melting of TPU polyurethane;
s5: placing the single unit in a concave die, then placing the single unit below a high-frequency machine head, covering a layer of TPU hot melt adhesive on the single unit, and fusing the single unit through high-temperature current;
s6: and removing the residual colloid on the product by laser cutting, and drying and shaping the product to obtain a final finished product.
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| CN100420581C (en) * | 2006-07-23 | 2008-09-24 | 王兆进 | Letter carving transfer film and producing method, and method for forming pattern on printed matters |
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