CN102464903A - Plastic film with plasticity and manufacturing method thereof applied to in-mold decoration - Google Patents

Abstract

A method for making a plastic film for in-mold decoration comprises: providing a substrate having an upper surface and a lower surface, a plastic film, an ink layer and a plastic, wherein the plastic film is at least composed of a photocurable multifunctional oligomer, a thermosetting resin and a crosslinking agent, and the photocurable multifunctional oligomer and the thermosetting resin are crosslinked by the crosslinking agent; coating the plastic film on the upper surface of the substrate; thermosetting the plastic film; photocuring the plastic film to form a plastic resin layer; coating the ink layer on the lower surface of the substrate; simultaneously shaping the plastic resin layer and the substrate into a predetermined shape; and shaping the plastic on the lower surface of the ink layer.

Description

Plastic film with plasticity and method for making same for in-mold decoration

technical field

The invention relates to a plastic film and its manufacturing method for in-mold decoration, especially a plastic film with plasticity and its manufacturing method for in-mold decoration.

Background technique

In conventional technology, the curing of coating systems containing reactive double bonds by means of radiation methods, such as ultraviolet radiation, infrared radiation or electron beam radiation, is well known and technically accomplished. This is one of the fastest curing methods in coatings technology, yet poor adhesion is a common problem. Furthermore, the curing of electromagnetic radiation curable coatings depends on the proper radiation dose. Areas with poor or no light exposure can result in significantly poorer cure or no crosslinking at all.

Binders based on isocyanates and polyols are ideal for producing high-quality coatings. The various desired coating properties, such as adhesion, elasticity, chemical resistance, weather resistance or scratch resistance, etc., can be adjusted within a wide range by changing the raw materials.

Combining the above two mutually independent curing structures into one adhesive system can combine their advantages. Such so-called "dual-cure" systems are known. For example, in US Pat. No. 4,342,793 the use of coating systems consisting of radiation curable reactive diluents such as acrylates, polyols and isocyanates is described. The problem with this system is that in areas where there is no light, this radiation-curable reactive diluent is left to act as a plasticizer, and thus the plasticizer can adversely affect the properties of the film, or even interfere with the film. Separation, resulting in undesirable physical effects.

It is also known that "dual-cure" adhesives, in which the radiation-curable group is chemically bonded to the polyisocyanate, avoid the above-mentioned problems. For example, European patent application EP-A0928800 describes the use of NCO-functionalized isocyanurate-group-containing urethane acrylates as a "dual-cure" coating system. In order to be able to use these coating compounds easily, a sufficiently low viscosity needs to be achieved, so it is known to use different organic solvents.

Due to ecological and cost requirements, if modern coating systems must use organic solvents, they should be used as little as possible. Therefore, in order to reduce the viscosity, low-viscosity coating resins must be used. In particular, as described in European patent EP-A 0682012, polyisocyanates having a urea formate structure have already been known for this purpose.

Furthermore, the plastic film produced by the above-mentioned traditional method can be applied to in-mold decoration, and the production process of the plastic film is roughly: step (1) coating → step (2) and then forming → step (3) Final curing. Then, since the above step (2) and step (3) may be implemented in two different places, when the semi-finished plastic film is transported from one place to another, special shielding is required to protect the semi-finished plastic film Free from curing by exposure to light. The reason is that the present inventor feels that the above-mentioned deficiency can be improved, carefully observes and studies it, and cooperates with the application of theories, and proposes an invention with a reasonable design and effectively improves the above-mentioned deficiency.

Contents of the invention

The technical problem to be solved by the present invention is to provide a plastic film with plasticity and its application method for in-mold decoration, wherein the plastic film can be coated and solidified for subsequent forming processing to produce predetermined shape.

In order to solve the above technical problems, according to one solution of the present invention, a plastic film with plasticity is provided, which includes: a photocurable multifunctional oligomer, a thermosetting resin and a crosslinking agent.

Wherein, the chemical formula of the photohardening polyfunctional oligomer is:

n1≥3，其中R₁为氢(H)及烷基(CH₃)之其中之一，R₂为烷基、聚胺酯、聚酯、丙烯酸酯及环氧树脂之其中之一。

n1≥3, wherein R ₁ is one of hydrogen (H) and alkyl (CH ₃ ), and R ₂ is one of alkyl, polyurethane, polyester, acrylate and epoxy resin.

In addition, the thermosetting resin is a linear structure composed of a polyol and an isocyanate. The chemical formula of the thermosetting resin is: -(-CONH-R-NHCO-ORO-) _n2 -, n2≥1 , where R is an alkyl group.

In addition, the crosslinking agent is composed of an acrylic functional group structure with a double bond and a hydroxyl structure. The chemical formula of the crosslinking agent is:

2≤n3+n4，1≤n3且1≤n4。

2≤n3+n4, 1≤n3 and 1≤n4.

Furthermore, the photocurable polyfunctional oligomer accounts for 20% to 70% by weight of the plastic film, the thermosetting resin accounts for 40% to 70% by weight of the plastic film, and the crosslinking agent accounts for the weight percent of the plastic film. The weight percentage of the plastic film is 10% to 40%. The above-mentioned acrylic functional group structure with double bonds is connected to the light-curable multi-functional oligomer, and the hydroxyl group structure is connected to the thermosetting resin.

In order to solve the above technical problems, according to one solution of the present invention, a plastic film with plasticity is provided, which includes: a photocurable multifunctional oligomer, a thermosetting resin and a crosslinking agent.

Wherein, the chemical formula of the photohardening polyfunctional oligomer is:

n1≥3，其中R₁为氢(H)及烷基(CH₃)之其中之一，R₂为烷基、聚胺酯、聚酯、丙烯酸酯及环氧树脂之其中之一。

n1≥3, wherein R ₁ is one of hydrogen (H) and alkyl (CH ₃ ), and R ₂ is one of alkyl, polyurethane, polyester, acrylate and epoxy resin.

In addition, the thermosetting resin is a linear structure composed of a polyol and an isocyanate. The chemical formula of the thermosetting resin is: -(-CONH-R-NHCO-ORO-) _n2 -, n2≥1 , where R is an alkyl group.

In addition, the crosslinking agent is composed of an acrylic functional group structure with a double bond and an isocyanate group structure. The chemical formula of the crosslinking agent is:

2≤n5+n6，1≤n5且1≤n6。

2≤n5+n6, 1≤n5 and 1≤n6.

Furthermore, the photocurable polyfunctional oligomer accounts for 20% to 70% by weight of the plastic film, the thermosetting resin accounts for 40% to 70% by weight of the plastic film, and the crosslinking agent accounts for the weight percent of the plastic film. The weight percentage of the plastic film is 10% to 40%. The above-mentioned acrylic functional group structure with double bonds is connected to the photocurable multifunctional oligomer, and the isocyanate group structure is connected to the thermosetting resin.

In order to solve the above technical problems, according to one of the proposals of the present invention, a method for making a plastic film for in-mold decoration is provided, which includes the following steps: first, provide a base with an upper surface and a lower surface material, a plastic film with plasticity, an ink layer and a plastic, wherein the plastic film with plasticity is at least composed of a photocurable multifunctional oligomer, a thermosetting resin and a crosslinking agent, and the photocurable multifunctional Both the base oligomer and the thermosetting resin are cross-linked by the cross-linking agent; then, the above-mentioned plastic film with plasticity is coated on the upper surface of the substrate; then, the above-mentioned plastic film with plasticity is thermally cured ; Next, photocure the above-mentioned plastic film with plasticity to form a plastic resin layer; then, coat the ink layer on the lower surface of the substrate; then, simultaneously shape the plastic resin layer and the substrate a predetermined shape; finally, forming the plastic on the lower surface of the ink layer.

Therefore, the beneficial effect of the present invention is that: the plastic plastic film still has a certain plasticity after being coated and solidified, so the plastic plastic film can still be subjected to subsequent forming processing after curing, so that the plastic plastic film The film is finally formed into a predetermined shape.

In order to further understand the features and technical content of the present invention, please refer to the following detailed description and drawings related to the present invention. However, the attached drawings are only for reference and illustration, and are not used to limit the present invention.

Description of drawings

Fig. 1 is a flow chart of the manufacturing method of the plastic film of the present invention applied to in-mold decoration.

Fig. 2 is a schematic diagram of the production process (from step (A) to step (G)) of the method for making the plastic film with plasticity applied to the in-mold decoration of the present invention.

Explanation of main component symbols

Base material: 1, upper surface: 10A, lower surface: 10B, plastic plastic film: 2, plastic resin layer: 2', ink layer: 3, plastic: 4.

Detailed ways

The first embodiment of the present invention provides a plastic film with plasticity, which at least includes: a photocurable multifunctional oligomer (such as an ultraviolet light curable multifunctional oligomer), a thermosetting resin (such as a thermosetting high Extending oligomer) and a cross-linking agent.

First, regarding the photohardening polyfunctional oligomer, its chemical formula can be:

n1≥3

n1≥3

Wherein R ₁ is H (hydrogen), then the light-hardening multifunctional oligomer is an acrylic resin or R ₁ is CH ₃ (alkyl), then the light-hardening multifunctional oligomer is a methacrylic resin, so R ₁ is H or one of CH ₃ , R ₂ can be one of alkyl, polyurethane, polyester, acrylate and epoxy resin, wherein the larger the n ₁ of the photocurable multifunctional oligomer, the more it can be The more reaction sites undergo the photocuring procedure, the higher the crosslinking density will be after the curing procedure, and the higher the hardness, wear characteristics and chemical resistance... etc., of course, the photocuring multifunctional oligomerization The larger the n ₁ of the object, the more unfavorable it is for subsequent molding.

In addition, regarding the thermosetting resin, it may be a linear structure composed of a polyol (diol) and an isocyanate. For example, polyols and isocyanates (such as diisocyanate) can be polymerized to form a linear PU polyurethane (Polyurethane, PU) resin. In addition, the chemical formula of the thermosetting resin may be: -(-CONH-R-NHCO-ORO-) _n2 -, n2≥1, wherein R may be an alkyl group.

Furthermore, regarding the crosslinking agent, it is designed to have a structure of thermosetting functional groups and photocurable functional groups, so as to complete the crosslinking of thermosetting resins and photocurable multifunctional oligomers. For example, the cross-linking agent can be composed of an acrylic functional group structure with a double bond and a hydroxyl structure. Therefore, the above-mentioned acrylic functional group structure with double bonds is connected to the photocurable multifunctional oligomer, and the hydroxyl group structure is connected to the thermosetting resin. In other words, both the photocurable polyfunctional oligomer and the thermosetting resin can be cross-linked by the designed cross-linking agent. In addition, the chemical formula of the crosslinking agent can be:

2≤n3+n4，1≤n3且1≤n4。

2≤n3+n4, 1≤n3 and 1≤n4.

Based on the above, for the first embodiment of the present invention, such as the example shown in the experimental data in Table 1, the photocurable multifunctional oligomer can account for about 20% to 70% by weight of the plastic film, and the thermosetting resin The weight percentage of the plastic film can be about 40% to 70%, and the weight percentage of the crosslinking agent can be about 10% to 40%.

In addition, according to different design requirements, in the first embodiment of the present invention, a UV-curable multifunctional reactive monomer, an organic-inorganic nano-hybrid material, an inorganic nanoparticle, and an initiator can be added to the composition of the plastic film. , an addition...and so on.

The organic-inorganic nano-hybrid material can include a nano-silicon dioxide and a nano-alumina, and as shown in the experimental data of Table 1, the weight percentage of the organic-inorganic nano-hybrid material in the plastic film can be 0.1% to 30% (preferably by weight The percentage can be 1% to 20%, and the optimum weight percentage is 5% to 10%). However, the above-mentioned definition of the weight percentage of the organic-inorganic nano-hybrid material in the plastic film is only for example, and not intended to limit the present invention.

For another example, as shown in the experimental data in Table 1, wherein the inorganic nanoparticles can include a nanoscale silicon dioxide micropowder and a nanoscale alumina micropowder, and the weight percentage of the inorganic nanoparticles in the plastic film can be from 0.1% to 30% (the preferred weight percentage can be 1% to 20%, and the best weight percentage can be 5% to 10%). However, the above definition of the weight percentage of the inorganic nano-particles in the plastic film is only for example, and is not intended to limit the present invention.

The second embodiment of the present invention provides a plastic film with plasticity, which at least includes: a photocurable multifunctional oligomer (such as an ultraviolet light curable multifunctional oligomer), a thermosetting resin (such as a thermosetting high Extending oligomer) and a cross-linking agent.

First, regarding the photohardening polyfunctional oligomer, its chemical formula is:

n1≥3

n1≥3

Wherein _R1 can be H (acrylic resin) or CH3 (methacrylic resin), _R2 can be one of alkyl, polyurethane, polyester, acrylate and epoxy resin, and the photohardening polyfunctional oligo R ₁ of the polymer may further include an alkyl group.

In addition, regarding the thermosetting resin, it may be a linear structure composed of a polyol (diol) and an isocyanate. For example, polyol and isocyanate (such as diisocyanate) can be polymerized to form a linear PU resin. In addition, the chemical formula of the thermosetting resin may be: -(-CONH-R-NHCO-ORO-) _n2 -, n2≥1, wherein R may be an alkyl group.

Furthermore, the cross-linking agent is designed to have a structure with a thermosetting functional group and a photo-curable functional group, so as to complete the cross-linking of the thermosetting resin and the photo-curable polyfunctional oligomer. For example, the cross-linking agent is composed of an acrylic functional group structure with a double bond and an isocyanate group structure. Therefore, the above-mentioned acrylic functional group structure with double bonds is connected to the photocurable polyfunctional oligomer, and the isocyanate group structure is connected to the thermosetting resin.

In other words, both the photocurable polyfunctional oligomer and the thermosetting resin can be cross-linked by the designed cross-linking agent. In addition, the chemical formula of the crosslinking agent can be:

其中2≤n5+n6、1≤n5且1≤n6；

Where 2≤n5+n6, 1≤n5 and 1≤n6;

Like the example given in the first embodiment of the present invention, in the second embodiment of the present invention, the photocurable polyfunctional oligomer accounts for about 20% to 70% by weight of the plastic film, and the thermosetting The resin accounts for about 40% to 70% by weight of the plastic film, and the crosslinking agent accounts for about 10% to 40% by weight of the plastic film.

Of course, according to different design requirements, in the second embodiment of the present invention, a UV-curable multifunctional reactive monomer, an organic-inorganic nano-hybrid material, an inorganic nano-particle, and starters, additives...etc. Specifically, the above-mentioned components of the present invention are preferably: thermosetting resin is preferably diisocyanate; photohardening polyfunctional oligomer is preferably polyurethane acrylate oligomer, polyester acrylate oligomer, acrylate oligomer or pure acrylate; the UV-curable polyfunctional reactive monomer is preferably trimethylolpropane triacrylate, pentaerythritol tetraacrylate or dipentaerythritol hexaacrylate; the crosslinking agent is preferably pentaerythritol triacrylate, β-carboxyethyl Acrylate or 2-hydroxyethyl methacrylate phosphate; Organic-inorganic nano-hybrid material is preferably Cytec EB8311 or DBC901H35; Inorganic nanoparticles are preferably nano-alumina dispersion or nano-silica dispersion; The initiator is preferably It is CIBA IGRACURE 184, IGRACURE 1173, IGRACURE TPO or IGRACURE 819; the auxiliary additive is preferably polyether modified silicone, acrylate copolymer or polyether modified polydimethylsiloxane.

Therefore, it can be seen from the above description that the biggest difference between the second embodiment of the present invention and the first embodiment is that the "hydroxyl structure" in the crosslinking agent defined in the first embodiment can be replaced by an "isocyanate group structure" And form the above-mentioned cross-linking agent in the second embodiment. Therefore, no matter the first embodiment or the second embodiment of the present invention can not only achieve the purpose of "completely cross-linking the thermosetting resin and the photocurable multifunctional oligomer", but also achieve the need of implementing the curing process in different places. And it saves the cost of adding shelters.

Please refer to Table 1. Samples 1 to 7 are experimental samples added with different formulations, and each experimental sample shows the weight percentage of each formulation. Among them, A is diisocyanate (thermosetting resin), B is urethane acrylate oligomer (photohardening multifunctional oligomer), and C is trimethylolpropane triacrylate (ultraviolet light curing multifunctional reactive monomer). ), D is pentaerythritol triacrylate (crosslinking agent), E is Cytec EB8311 (manufactured by Cytec, organic-inorganic nano-hybrid material SiO ₂ ), F is nano-alumina dispersion (inorganic nanoparticles), and G is CIBA IGRACURE 184 (manufactured by CIBA, starter), H is an acrylate copolymer (auxiliary additive).

<Table 1>

A B C D E F G h sample 1 70% 15% 15% 1.8% 3% sample 2 55% 32.5% 12.5% 2.7% 3% sample 3 40% 50% 10% 3.6% 3% Sample 4 55% 32.5% 12.5% 5% 3.6% 3.15% Sample 5 55% 32.5% 12.5% 10% 3.6% 3.3% Sample 6 55% 32.5% 10% 12.5% 5% 4.2% 3.5% Sample 7 55% 32.5% 10% 12.5% 5% 4.2% 3.5%

Please refer to Table 2 for the different experimental samples prepared from samples 1 to 7 above.

The test of 7 different quality characteristics in the following example is carried out in order to obtain relevant experimental data.

<Table 2>

Based on the experimental data in Table 1 and Table 2 above, the following conclusions are obtained:

1. From the comparison of sample 1 to sample 3, it can be seen that when the weight percentage of thermosetting resin gradually decreases, the weight percentage of photohardening multifunctional oligomer gradually increases, the weight percentage of crosslinking agent gradually decreases and the weight percentage of initiator When the percentage increases gradually, the data obtained by the hardness test (Hardness) has an upward trend (from H to 3H), and the data obtained by the steel wool abrasion resistance test (ΔHaze) has a downward trend (from 12.58 to 9.12), The data obtained by the RCA wear resistance test (Cycles) has an upward trend (from 20cycles to 50cycles), the data obtained by the formability test (Forming ability) has a downward trend (from excellent to average), and the extensibility test The data obtained by (Elongation) has a downward trend (from 1.5 times to 1.1 times).

2. From the comparison of sample 2, sample 4 and sample 5, it can be seen that when the weight percentage of the organic-inorganic nano-hybrid material increases (from 0% to 10%), the data obtained by the steel wool abrasion resistance test (ΔHaze) has Downward trend (from 10.75 to 0.19). Therefore, increasing the weight percentage of the organic-inorganic nano-hybrid material to 5% can effectively increase the wear resistance of the steel wool.

3. From the comparison of sample 4 and sample 6, it can be seen that when the weight percentage of the UV-curable multifunctional reactive monomer increases (from 0% to 10%), the data obtained by the RCA wear resistance test (Cycles) has There is a sharp upward trend (from 30cycles to 100cycles), and the data obtained from the steel wool abrasion resistance test (ΔHaze) has a downward trend (from 0.22 to 0.05). Therefore, increasing the weight percentage of the UV-curable polyfunctional reactive monomer can greatly increase the wear resistance of RCA, but it cannot effectively increase the wear resistance of steel wool.

4. From the comparison of sample 6 and sample 7, it can be seen that when sample 7 is added with inorganic nanoparticles, the wear resistance of steel wool is poor (from 0.05 to 0.19), and the data obtained by the optical characteristic test (Haze) has a large range An upward trend (from 0.17 to 1.97), which leads to poor transparency. Therefore, the addition of inorganic nanoparticles will affect the optical properties (transparency). Therefore, the best embodiment of the present invention is sample 6, which has both high hardness (2H), excellent steel wool abrasion resistance and RCA abrasion resistance, and formability and extensibility.

Please refer to the first figure and the second figure, the present invention provides a method of making a plastic film for in-mould decoration (In-Mould Decoration), which includes the following steps:

Step 1 (S100): Firstly, as shown in the first and second drawings (A), a substrate 1 having an upper surface 10A and a lower surface 10B is provided. For example, the substrate 1 is polyethylene terephthalate (Polyethylene Terephthalate, PET), polycarbonate (Polycarbonate, PC), tri-acetyl cellulose (Tri-acetyl Cellulose, TAC), polymethacrylic acid Polymethylmethacrylate (PMMA), methylmethacrylate-styrene copolymer (Methylmethacrylate styrene) or cycloolefin copolymer (Cyclic OlefinCopolymer, COC), and the thickness of the substrate 1 is between 10 and 1000 microns (μm) between.

Step 2 (S102): Then, as shown in the first figure and the second figure (B), coat a plastic film 2 with plasticity on the upper surface 10A of the substrate 1, wherein the plastic film 2 with plasticity It is at least composed of a photocurable multifunctional oligomer, a thermosetting resin and a crosslinking agent, and the photocurable multifunctional oligomer and the thermosetting resin are both crosslinked by the crosslinking agent. In addition, the definitions of the photocurable polyfunctional oligomer, the thermosetting resin and the crosslinking agent are the same as those described in the first embodiment and the second embodiment above.

Step 3 (S104): Then, as shown in the first figure and the second figure (C), thermally harden the above-mentioned plastic film 2 with plasticity. For example, the above-mentioned plastic film 2 with plasticity can be hardened by heating (as shown by the downward arrow in the second figure (C)).

Step 4 (S106): Next, as shown in the first figure and the second figure (D), light-cure the above-mentioned plastic film 2 with plasticity to form a plastic resin layer 2'. For example, the above-mentioned plastic film 2 with plasticity can be hardened by irradiating ultraviolet light (as shown by the downward arrow in the second figure (D)).

Step 5 (S108): Next, as shown in the first figure and the second figure (E), coat an ink layer 3 on the lower surface 10B of the substrate 1 .

Step 6 (S110): Then, as shown in the first figure and the second figure (F), the plastic resin layer 2' and the base material 1 are formed into a predetermined shape at the same time. For example, Step 6 may utilize a high pressure forming or a vacuum forming method to simultaneously form the plastic resin layer 2 ′, the substrate 1 and the ink layer 3 into a predetermined shape.

Step 7 (S112): Finally, as shown in the first and second drawings (G), a plastic 4 is formed on the lower surface of the ink layer 3 . For example, step seven can utilize injection molding to simultaneously inject and attach the plastic 4 on the lower surface of the ink layer 3 .

To sum up, the plastic film with plasticity can still have certain plasticity after being coated and cured. As shown in Table 2, the hardness of sample 6 reaches 2H and the elongation test reaches 1.15X. It can reach a hardness of 2H, but its elongation test is only 1.05X, so it is easy to crack the film surface and increase the difficulty of subsequent processing. Therefore, the plastic film of the present invention can still be processed after curing. So that the plastic film is finally formed into a predetermined shape.

The above descriptions are only preferred feasible embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Therefore, all equivalent technical changes made by using the description and drawings of the present invention are included in the scope of the present invention.

Claims (9)

1. A kind of plastic film with plasticity, is characterized in that, comprises: A photohardenable polyfunctional oligomer, whose chemical formula is

n1≥3, wherein _R1 is one of hydrogen and alkyl, _R2 is one of alkyl, polyurethane, polyester, acrylate and epoxy resin; A thermosetting resin, which is a linear structure composed of a polyol and an isocyanate. The chemical formula of the thermosetting resin is -(-CONH-R-NHCO-ORO-) _n2 -, n2≥1, where R is an alkyl group; and A cross-linking agent, which is composed of an acrylic functional group structure with a double bond and a hydroxyl structure, the chemical formula of the cross-linking agent is

2≤n3+n4, 1≤n3 and 1≤n4; Wherein, the weight percentage of the light-curable polyfunctional oligomer is 20% to 70% of the plastic film, the thermosetting resin is 40% to 70% of the weight percentage of the plastic film, and the crosslinking agent is 40% to 70% of the plastic film. The weight percentage of the film is 10% to 40%. The above-mentioned acrylic functional group structure with double bonds is connected to the photocurable multifunctional oligomer, and the hydroxyl group structure is connected to the thermosetting resin. 2. The plastic film with plasticity as claimed in claim 1, is characterized in that, in the composition of this plastic film, add a UV-curable multifunctional reactive monomer, an organic-inorganic nano-hybrid material, an inorganic nanoparticle, together starter and an additive. 3. The plastic film with plasticity as claimed in claim 2, characterized in that, the organic-inorganic nano-hybrid material comprises a nano-silicon dioxide and a nano-alumina, and the organic-inorganic nano-hybrid material accounts for the weight of the plastic film The percentage is from 0.1% to 30%. 4. the plastic film with plasticity as claimed in claim 2, is characterized in that, this inorganic nanoparticle comprises a nanoscale silicon dioxide micropowder and a nanoscale alumina micropowder, and this inorganic nanoparticle accounts for the weight of this plastic film The percentage is from 0.1% to 30%. 5. A plastic film with plasticity, comprising: A photohardenable polyfunctional oligomer, whose chemical formula is

n1≥3, wherein _R1 is one of hydrogen and alkyl, and _R2 is one of alkyl, polyurethane, polyester, acrylate and epoxy resin; A thermosetting resin, which is a linear structure composed of a polyol and an isocyanate. The chemical formula of the thermosetting resin is -(-CONH-R-NHCO-ORO-) _n2 -, n2≥1, where R is an alkyl group; and A crosslinking agent, which is composed of an acrylic functional group structure with a double bond and an isocyanate group structure, the chemical formula of the crosslinking agent is

2≤n5+n6, 1≤n5 and 1≤n6; Wherein, the light-curable polyfunctional oligomer accounts for 20% to 70% by weight of the plastic film, the thermosetting resin accounts for 40% to 70% by weight of the plastic film, and the crosslinking agent accounts for the plastic film The weight percentage of the film is 10% to 40%. The above-mentioned acrylic functional group structure with double bonds is connected to the photocurable multifunctional oligomer, and the isocyanate group structure is connected to the thermosetting resin. 6. A method for making a plastic film for in-mold decoration, characterized in that it comprises the following steps: Step 1: Provide a base material with an upper surface and a lower surface, a plastic film with plasticity, an ink layer and a plastic, wherein the above-mentioned plastic film with plasticity is at least made of photocurable polyfunctional oligomer, thermosetting Composed of a resin and a crosslinking agent, and both the photocurable multifunctional oligomer and the thermosetting resin are crosslinked by the crosslinking agent; Step 2: coating the above-mentioned plastic film with plasticity on the upper surface of the substrate; Step 3: thermosetting the above-mentioned plastic film with plasticity; Step 4: light-curing the above-mentioned plastic film with plasticity to form a plastic resin layer; Step 5: coating the ink layer on the lower surface of the substrate; Step 6: Simultaneously forming the plastic resin layer and the substrate into a predetermined shape; and Step 7: forming the plastic on the lower surface of the ink layer. 7. The method for making a plastic film with plasticity for in-mold decoration as claimed in claim 6, wherein step 6 is completed by high pressure forming or vacuum forming. 8. The method for making a plastic film with plasticity for in-mold decoration as claimed in claim 6, characterized in that step 7 is to use injection molding to simultaneously inject and attach the plastic to the lower surface of the ink layer superior. 9. The method for applying a plastic plastic film to in-mold decoration as claimed in claim 6, wherein the base material is polyethylene terephthalate, polycarbonate, cellulose triacetate, poly methyl methacrylate, methyl methacrylate-styrene copolymer or cycloolefin copolymer, and the thickness of the substrate is between 10 and 1000 microns.

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