CN110920206B - Solvent-free composite positioning anti-counterfeiting transfer paper and preparation method thereof - Google Patents

Solvent-free composite positioning anti-counterfeiting transfer paper and preparation method thereof Download PDF

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CN110920206B
CN110920206B CN201911344899.8A CN201911344899A CN110920206B CN 110920206 B CN110920206 B CN 110920206B CN 201911344899 A CN201911344899 A CN 201911344899A CN 110920206 B CN110920206 B CN 110920206B
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transfer
positioning
solvent
parts
coating
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CN110920206A (en
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赵晋彬
吕伟
闵东
郭鹏飞
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Shenzhen Jinjia Group Co Ltd
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Shenzhen Jinjia Group Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/002—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/10—Removing layers, or parts of layers, mechanically or chemically
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/10—Printing inks based on artificial resins
    • C09D11/102—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds
    • 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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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Printing Methods (AREA)
  • Credit Cards Or The Like (AREA)

Abstract

The invention provides solvent-free composite positioning anti-counterfeiting transfer paper and a preparation method thereof, wherein the method comprises the following steps: stretching the PET positioning transfer film in a fixed length mode, and then coating a solvent-free adhesive to obtain a transfer film with an adhesive layer on the surface; coating thermochromic ink or optical color-changing ink on the surface of the white cardboard, and drying to obtain the white cardboard with the anti-counterfeiting layer on the surface; superposing the transfer film on the white cardboard, enabling an adhesive layer of the transfer film to be in direct contact with an anti-counterfeiting layer of the white cardboard, and carrying out composite treatment on the superposed transfer film and white cardboard to obtain composite paper; curing the composite paper, and peeling off the PET base film on the composite paper to obtain the solvent-free composite positioning anti-counterfeiting transfer paper; the invention realizes the compound production of the positioning transfer paper with low cost, low energy consumption and more environmental protection, and simultaneously realizes the anti-counterfeiting coating of the paper, increases the anti-counterfeiting performance of the product and realizes multiple anti-counterfeiting.

Description

Solvent-free composite positioning anti-counterfeiting transfer paper and preparation method thereof
Technical Field
The invention relates to the field of anti-counterfeiting transfer paper, in particular to solvent-free composite positioning anti-counterfeiting transfer paper and a preparation method thereof.
Background
With the improvement of living standard of people, consumers put higher requirements on product packaging, and the development of printing technology is indirectly promoted. Product packaging has evolved from the original function of protecting the contents to an important part of the value enhancement and added value creation of the product. Especially for tobacco products, the package is a business card which promotes brand culture. But for the tobacco package, the anti-counterfeiting paper also has certain anti-counterfeiting function and meets the requirements of health and environmental protection while meeting the decoration and propaganda effects.
Most of the existing transfer paper production processes adopt solvent adhesives for compounding, however, the solvent adhesives need to be dried by heating, and the drying process not only has high energy consumption, but also can cause the emission of a large amount of VOCs and pollute the environment; in addition, the solvent-based adhesive has large coating amount and high cost in the using process, and the anti-counterfeiting effect of the prepared transfer paper is poor.
Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide solvent-free composite positioning anti-counterfeiting transfer paper and a preparation method thereof, and aims to solve the problems that the preparation cost is high, the environment is easily polluted and the anti-counterfeiting effect is poor due to the fact that solvent adhesives are adopted in the existing preparation method of the transfer paper.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a preparation method of solvent-free composite positioning anti-counterfeiting transfer paper comprises the following steps:
stretching the PET positioning transfer film in a fixed length mode, and then coating a solvent-free adhesive to obtain a transfer film with an adhesive layer on the surface;
coating thermochromic ink or optical color-changing ink on the surface of the white cardboard, and drying to obtain the white cardboard with the anti-counterfeiting layer on the surface;
superposing the transfer film on the white cardboard, enabling an adhesive layer of the transfer film to be in direct contact with an anti-counterfeiting layer of the white cardboard, and carrying out composite treatment on the superposed transfer film and white cardboard to obtain composite paper;
and curing the composite paper, and peeling off the PET base film on the composite paper to obtain the solvent-free composite positioning anti-counterfeiting transfer paper.
The preparation method of the solvent-free composite positioning anti-counterfeiting transfer paper comprises the following steps of:
providing a PET base film, and preparing a release coating on the surface of the PET base film;
performing mould pressing on the positioning laser information layer on the release coating by adopting a prefabricated mould pressing plate to obtain a positioning cursor information layer;
and evaporating a zinc sulfide layer or a silicon dioxide layer on the PET base film with the positioning cursor information layer to obtain the PET positioning transfer film.
The preparation method of the solvent-free composite positioning anti-counterfeiting transfer paper comprises the following steps of:
identifying a positioning cursor on the PET positioning transfer film through an electric eye to obtain positioning information;
and adjusting the rotating speed of a plate distance adjusting roller at the temperature of 60-80 ℃ according to the positioning information to perform fixed-length stretching on the PET positioning transfer film, wherein the tension control interval is 25-30N.
The preparation method of the solvent-free composite positioning anti-counterfeiting transfer paper comprises the following steps of:
coating a solvent-free adhesive on the surface of the PET positioning transfer film by adopting a five-roller coating system, wherein the five-roller coating system comprises a metering roller, a transfer anilox roller, a transfer rubber roller, a coating steel roller and a coating press roller which are sequentially contacted, and the transfer anilox roller, the transfer rubber roller and the coating steel roller are respectively driven by a single servo motor;
and controlling the amount of the adhesive coated on the surface of the PET transfer film by adjusting the gap, the rotating speed and the pressure among the metering roller, the transfer anilox roller, the transfer rubber roller, the coating steel roller and the coating press roller.
The preparation method of the solvent-free composite positioning anti-counterfeiting transfer paper comprises the following steps of preparing a solvent-free adhesive, and preparing a solvent-free composite positioning anti-counterfeiting transfer paper by using the solvent-free adhesive, wherein the solvent-free adhesive comprises polyester polyol and diphenylmethane-4, 4' diisocyanate.
The preparation method of the solvent-free composite positioning anti-counterfeiting transfer paper comprises the following steps of: 20-40 parts of epoxy acrylic resin, 20-40 parts of 1.6 hexanediol diacrylate, 25-35 parts of tripropylene glycol diacrylate, 15-25 parts of trimethylolpropane triacrylate, 5-9 parts of 2.4.6 (trimethylbenzoyl) diphenylphosphine oxide, 3-5 parts of a benzophenone derivative, 1-5 parts of epoxy acrylic resin, 5-10 parts of talcum powder, 0-1 part of hydroxyl-terminated polydimethylsiloxane and 15-20 parts of poly N- (2-aminoethyl) -10, 12-pentacosadiynylamide and organic montmorillonite composite.
The preparation method of the solvent-free composite positioning anti-counterfeiting transfer paper comprises the following steps of: 20-40 parts of polyurethane resin, 20-40 parts of polyester resin, 25-35 parts of tripropylene glycol diacrylate, 15-25 parts of trimethylolpropane triacrylate, 5-9 parts of benzophenone derivatives, 3-5 parts of active amine, 1-5 parts of 2-isopropyl thioxanthone, 5-10 parts of filler, 0-2 parts of silicone oil and 15-20 parts of optically variable pigment OYB 20.
The preparation method of the solvent-free composite positioning anti-counterfeiting transfer paper comprises the step of carrying out composite treatment at the composite speed of 200-250 m/min.
The preparation method of the solvent-free composite positioning anti-counterfeiting transfer paper comprises the following steps of curing at 35-45 ℃ and at 50-60% of humidity.
The invention relates to solvent-free composite positioning anti-counterfeiting transfer paper, which is prepared by adopting the preparation method.
Has the advantages that: the preparation method of the solvent-free composite positioning anti-counterfeiting transfer paper provided by the invention realizes the purposes of reducing cost, saving energy consumption, reducing VOCs emission and being more environment-friendly.
Drawings
FIG. 1 is a flow chart of a preferred embodiment of a method for preparing solvent-free composite positioning anti-counterfeiting transfer paper provided by the invention.
FIG. 2 is a schematic diagram of the structure of the solvent-free compounding device of the present invention.
FIG. 3 is a schematic structural diagram of solvent-free composite positioning anti-counterfeiting transfer paper prepared by the invention.
Fig. 4 is a schematic structural view of a five-roll coating system of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a flow chart of a preferred embodiment of a method for manufacturing solvent-free composite positioning anti-counterfeiting transfer paper, as shown in the figure, the method includes the steps of:
s10, stretching the PET positioning transfer film to a fixed length, and coating a solvent-free adhesive to obtain a transfer film with an adhesive layer on the surface;
s20, coating thermochromic ink or optical color-changing ink on the surface of the white cardboard, and drying to obtain the white cardboard with the anti-counterfeiting layer on the surface;
s30, overlapping the transfer film on the white cardboard, enabling the adhesive layer of the transfer film to be in direct contact with the anti-counterfeiting layer of the white cardboard, and performing composite treatment on the overlapped transfer film and white cardboard to obtain composite paper;
s40, carrying out curing treatment on the composite paper, and peeling off the PET base film on the composite paper to obtain the solvent-free composite positioning anti-counterfeiting transfer paper.
The embodiment realizes the compound production of the solvent-free compound positioning anti-counterfeiting transfer paper, simultaneously realizes the anti-counterfeiting coating of the paper, increases the anti-counterfeiting performance of the product and realizes multiple anti-counterfeiting; and the preparation method provided by the embodiment is simple and easy to realize, can save cost and energy consumption, reduces the discharge of VOCs, and is more environment-friendly.
In some embodiments, the preparation of the PET positioning transfer film comprises the steps of: providing a PET base film, and preparing a release coating on the surface of the PET base film; performing mould pressing on the positioning laser information layer on the release coating by adopting a prefabricated mould pressing plate to obtain a positioning cursor information layer; and evaporating a zinc sulfide layer or a silicon dioxide layer on the PET base film with the positioning cursor information layer to obtain the PET positioning transfer film.
Specifically, a PET base film with the thickness of 15 μm is selected, a release coating is coated on the PET base film, the release coating is mainly composed of montan wax, namely montan wax, the coating speed is 100-110m/min, a 100-120-mesh ceramic roller is coated, and the coating weight is 1.20-1.30g/m2The solvent is ethyl ester and butanone in the ratio of 1 to 1, 6 groups of drying ovens are adopted for drying, the temperature of the drying ovens is 90 ℃, 100 ℃, 120 ℃, 115 ℃, 100 ℃, 80 ℃ in sequence, and the temperature deviation is less than 10 ℃; and then, performing mould pressing on the positioning laser information layer on the release coating by using a designed and manufactured mould pressing plate, wherein the mould pressing speed is 60-80m/min, the plate roller temperature is 155-165 ℃, the hardness of a stamping roller is 95-98 Shore hardness, and the mould pressing plate is provided with positioning cursor information. And finally, putting the PET base film with the positioning cursor information layer into a vacuum chamber for evaporation of zinc sulfide (at the temperature of 1100 ℃) or silicon dioxide (at the temperature of 1300 ℃) to prepare the PET positioning transfer film.
In some embodiments, the present embodiment further provides a solvent-free compounding apparatus as shown in fig. 2, where the solvent-free compounding apparatus includes a film unwinding device 10, a plate pitch adjusting device 20, and a five-roller coating system 30, through which the PET positioning transfer film sequentially passes; the white cardboard sequentially passes through a paper unreeling unit 40 and an ink coating unit 50; carrying out composite treatment on the white cardboard and the PET positioning transfer film to form a composite structure 60 of composite paper; and a feeding channel 70 and a compound winding 80 through which the compound paper passes in sequence.
In some embodiments, the step of stretching the PET positioning transfer film to a fixed length comprises: identifying a positioning cursor on the PET positioning transfer film through an electric eye to obtain positioning information; and adjusting the rotating speed of a plate distance adjusting roller at the temperature of 60-80 ℃ according to the positioning information to perform fixed-length stretching on the PET positioning transfer film, wherein the tension control interval is 25-30N. Specifically, the plate distance adjusting device 20 is internally provided with an electric eye 21 for detecting the position of a positioning cursor and a plate distance adjusting roller 22 with adjustable rotating speed, in the embodiment, the position of the positioning cursor on the PET positioning transfer film is detected through the electric eye 21, the plate distance is calculated, when the plate distance is too large or too small, a feedback signal is sent to a tension control system, the rotating speed of the plate distance adjusting roller 22 is adjusted through tension, so that the stretching length is adjusted, the plate distance is ensured to be in a qualified range, and the fixed length stretching accuracy of the transfer film is ensured.
In some embodiments, as shown in fig. 2 and 4, the five-roll coating system includes a metering roll 31, a transfer anilox roll 32, a transfer blanket roll 33, a coating steel roll 34, and a coating nip roll 35 in sequential contact. This embodiment adopts five roller coating systems will not have solvent gluing agent coating PET location transfer membrane surface, through the adjustment measuring roller, transfer reticulation roller, transfer rubber roll, coating steel rod and coating clearance, rotational speed and the pressure control coating between the compression roller are in PET transfer membrane surface's gluing agent volume adopts to transfer the reticulation roller to replace traditional transfer steel roller, and glue ration coating is more accurate, and the homogeneity is better. In some specific embodiments, the pressure of the transfer rubber roll to the coating steel roll and the pressure of the transfer anilox roll and the pressure of the coating press roll to the coating steel roll are generally controlled to be 0.2-0.3 MPa.
Specifically, the transfer anilox roller 32, the transfer rubber roller 33 and the coating steel roller 34 are respectively driven by a single servo motor, and a reasonable rotation speed ratio is kept among the three through the drive control of the servo motors, so that the gluing amount can be adjusted and controlled. During working, the adhesive is evenly plated among the transfer anilox roller, the transfer rubber roller and the coating steel roller; the hardness of the transfer rubber roll is 70-75D Shore hardness, and the hardness of the coating press roll is 90-95D Shore hardness, so that low-ration uniform coating is ensured; the five-roller coating system adopts full-automatic control, automatically detects the storage liquid level of the coating, automatically adds the adhesive, and can realize left and right quick movement of the adhesive supplying gun, thereby ensuring the left and right uniformity of the added glue.
In some embodiments, the solvent-free adhesive includes a polyester polyol and diphenylmethane-4, 4' diisocyanate. In some specific embodiments, the mass ratio of the polyester polyol to the diphenylmethane-4, 4' diisocyanate is 3: 7, and the ratio can ensure the curing speed of the solvent-free adhesive, the adhesive force during compounding and the flexibility after curing.
In some embodiments, as shown in fig. 2, the ink coating unit 50 further includes a drying device 51 therein, and the white cardboardAnd the white cardboard comes out from the paper unreeling 40 and passes through the ink coating unit 50, thermochromic ink or optical color-changing ink is coated in the ink coating unit 50, and the white cardboard with the anti-counterfeiting layer on the surface is obtained after the white cardboard is dried by the drying device 51. According to the embodiment, different anti-counterfeiting information can be designed for coating according to product requirements, the coating roller wire is 80100, the plate depth is 45-50 mu m, and the coating weight is 2.0g/m2。
In some specific embodiments, the thermochromic ink comprises, in parts by weight: 20-40 parts of epoxy acrylic resin, 20-40 parts of 1.6 hexanediol diacrylate, 25-35 parts of tripropylene glycol diacrylate, 15-25 parts of trimethylolpropane triacrylate, 5-9 parts of 2.4.6 (trimethylbenzoyl) diphenylphosphine oxide, 3-5 parts of a benzophenone derivative, 1-5 parts of epoxy acrylic resin, 5-10 parts of talcum powder, 0-1 part of hydroxyl-terminated polydimethylsiloxane and 15-20 parts of poly N- (2-aminoethyl) -10, 12-pentacosadiynylamide and organic montmorillonite composite.
In other specific embodiments, the solvent-free composite positioning anti-counterfeiting transfer paper preparation method comprises the following steps: 20-40 parts of polyurethane resin, 20-40 parts of polyester resin, 25-35 parts of tripropylene glycol diacrylate, 15-25 parts of trimethylolpropane triacrylate, 5-9 parts of benzophenone derivatives, 3-5 parts of active amine, 1-5 parts of 2-isopropyl thioxanthone, 5-10 parts of filler, 0-2 parts of silicone oil and 15-20 parts of optically variable pigment OYB 20.
In some embodiments, as shown in fig. 2, the composite structure 60 can be used to laminate the transfer film on the white cardboard, and make the adhesive layer of the transfer film directly contact with the anti-counterfeit layer of the white cardboard, so as to composite the laminated transfer film and white cardboard, thereby obtaining the composite paper. In some specific embodiments, the compounding speed of the compounding treatment is 200-250 m/min.
In some embodiments, the compounded paper is placed in a curing chamber for curing, the temperature of the curing chamber is 35-45 ℃, the humidity is 50-60%, and the curing time is 12 hours; and finally, processing the cured composite paper on a machine to peel off the PET base film to obtain the solvent-free composite positioning anti-counterfeiting transfer paper shown in figure 3.
In some embodiments, the invention also provides solvent-free composite positioning anti-counterfeiting transfer paper, wherein the anti-counterfeiting transfer paper is prepared by the preparation method.
In conclusion, the solvent-free composite positioning anti-counterfeiting transfer paper preparation method provided by the invention achieves the purposes of reducing cost, saving energy consumption, reducing VOCs (volatile organic compounds) emission and being more environment-friendly. Through the improvement to solvent-free compound equipment, can realize the compound production of location transfer paper, can realize the anti-fake coating of paper simultaneously, increase the anti-fake performance of product, realize multiple anti-fake.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.

Claims (8)

1. A preparation method of solvent-free composite positioning anti-counterfeiting transfer paper is characterized by comprising the following steps:
stretching the PET positioning transfer film in a fixed length mode, and then coating a solvent-free adhesive to obtain a transfer film with an adhesive layer on the surface;
coating thermochromic ink or optical color-changing ink on the surface of the white cardboard, and drying to obtain the white cardboard with the anti-counterfeiting layer on the surface;
superposing the transfer film on the white cardboard, enabling an adhesive layer of the transfer film to be in direct contact with an anti-counterfeiting layer of the white cardboard, and carrying out composite treatment on the superposed transfer film and white cardboard to obtain composite paper;
curing the composite paper, and peeling off the PET base film on the composite paper to obtain the solvent-free composite positioning anti-counterfeiting transfer paper;
the step of coating the solvent-free adhesive on the PET positioning transfer film subjected to fixed-length stretching treatment comprises the following steps:
coating a solvent-free adhesive on the surface of the PET positioning transfer film by adopting a five-roller coating system, wherein the five-roller coating system comprises a metering roller, a transfer anilox roller, a transfer rubber roller, a coating steel roller and a coating press roller which are sequentially contacted, and the transfer anilox roller, the transfer rubber roller and the coating steel roller are respectively driven by a single servo motor;
controlling the amount of the adhesive coated on the surface of the PET transfer film by adjusting the gap, the rotating speed and the pressure among the metering roller, the transfer anilox roller, the transfer rubber roller, the coating steel roller and the coating press roller;
the five-roller coating system adopts full-automatic control, automatically detects the storage liquid level of the coating, automatically adds the solvent-free adhesive, and allows the adhesive gun to move left and right;
the pressure of the transfer rubber roll to the coating steel roll and the transfer anilox roll and the pressure of the coating pressing roll to the coating steel roll are 0.2-0.3 MPa;
when the transfer device works, a solvent-free adhesive is uniformly coated among the transfer anilox roller, the transfer rubber roller and the coating steel roller, the hardness of the transfer rubber roller is 70-75D in Shore hardness, and the hardness of the coating press roller is 90-95D in Shore hardness;
the solvent-free adhesive comprises polyester polyol and diphenylmethane-4, 4 'diisocyanate, and the mass ratio of the polyester polyol to the diphenylmethane-4, 4' diisocyanate is 3: 7.
2. The method for preparing the solvent-free composite positioning anti-counterfeiting transfer paper according to claim 1, wherein the preparation of the PET positioning transfer film comprises the following steps:
providing a PET base film, and preparing a release coating on the surface of the PET base film;
performing mould pressing on the positioning laser information layer on the release coating by adopting a prefabricated mould pressing plate to obtain a positioning cursor information layer;
and evaporating a zinc sulfide layer or a silicon dioxide layer on the PET base film with the positioning cursor information layer to obtain the PET positioning transfer film.
3. The method for preparing the solvent-free composite positioning anti-counterfeiting transfer paper according to any one of claims 1 to 2, wherein the step of stretching the PET positioning transfer film in a fixed length comprises the following steps:
identifying a positioning cursor on the PET positioning transfer film through an electric eye to obtain positioning information;
and adjusting the rotating speed of a plate distance adjusting roller at the temperature of 60-80 ℃ according to the positioning information to perform fixed-length stretching on the PET positioning transfer film, wherein the tension control interval is 25-30N.
4. The method for preparing the solvent-free composite positioning anti-counterfeiting transfer paper according to claim 1, wherein the thermochromic ink comprises the following components in parts by weight: 20-40 parts of epoxy acrylic resin, 20-40 parts of 1.6 hexanediol diacrylate, 25-35 parts of tripropylene glycol diacrylate, 15-25 parts of trimethylolpropane triacrylate, 5-9 parts of 2.4.6 (trimethylbenzoyl) diphenylphosphine oxide, 3-5 parts of benzophenone derivatives, 1-5 parts of epoxy acrylic resin, 5-10 parts of talcum powder, 0-1 part of hydroxyl-terminated polydimethylsiloxane and 15-20 parts of poly N- (2-aminoethyl) -10, 12-pentacosadiynylamide and organic montmorillonite composite material.
5. The method for preparing the solvent-free composite positioning anti-counterfeiting transfer paper according to claim 1, wherein the optical color-changing ink comprises the following components in parts by weight: 20-40 parts of polyurethane resin, 20-40 parts of polyester resin, 25-35 parts of tripropylene glycol diacrylate, 15-25 parts of trimethylolpropane triacrylate, 5-9 parts of benzophenone derivatives, 3-5 parts of active amine, 1-5 parts of 2-isopropyl thioxanthone, 5-10 parts of filler, 0-2 parts of silicone oil and 15-20 parts of optically variable pigment OYB 20.
6. The method for preparing the solvent-free composite positioning anti-counterfeiting transfer paper as claimed in claim 1, wherein the composite speed of the composite treatment is 200-250 m/min.
7. The preparation method of the solvent-free composite positioning anti-counterfeiting transfer paper, according to claim 1, is characterized in that the curing temperature is 35-45 ℃ and the humidity is 50-60%.
8. A solvent-free composite positioning anti-counterfeiting transfer paper, which is characterized by being prepared by the preparation method of any one of claims 1 to 7.
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CN202319673U (en) * 2011-11-23 2012-07-11 贵州劲嘉新型包装材料有限公司 Laser transfer film with locating cursors
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