CN110551473B - High-weather-resistance high-adhesion-force adhesive and FFC wire reinforcing plate - Google Patents
High-weather-resistance high-adhesion-force adhesive and FFC wire reinforcing plate Download PDFInfo
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- CN110551473B CN110551473B CN201910848278.7A CN201910848278A CN110551473B CN 110551473 B CN110551473 B CN 110551473B CN 201910848278 A CN201910848278 A CN 201910848278A CN 110551473 B CN110551473 B CN 110551473B
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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
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- 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
- C09J167/00—Adhesives based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Adhesives based on derivatives of such polymers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/08—Flat or ribbon cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Macromonomer-Based Addition Polymer (AREA)
Abstract
A high weather-resistant high adhesion adhesive and an FFC wire reinforcing plate, the adhesive comprising: 50-80 parts of saturated polyester resin A, 10-35 parts of saturated polyester resin B and 10-25 parts of functional master batch; the functional master batch comprises: 80-90% of unsaturated polyester resin C, 2-12% of acrylate monomer, 0.5-5% of stabilizer and the balance of filler. The FFC wire reinforcing plate is provided with an insulating film layer, the hot melt adhesive layer and the ink layer; according to the invention, polyester resins with different glass transition temperatures are selected, and functional resin added with a stabilizer is adopted, so that the bonding force of the reinforcing plate to the FFC flat cable is improved, the thermal stability and long-term application temperature resistance in the production process are improved, and the problem of thickness fluctuation of the polyester resin in the high-temperature processing production process due to thermal instability can be effectively avoided.
Description
Technical Field
The invention relates to the technical field of FFC wires, in particular to a high-weather-resistance high-adhesion adhesive and an FFC wire reinforcing plate.
Background
The FFC (flexible flat cable) is formed by hot pressing an insulating hot melt adhesive tape taking PET as a base material and an extremely thin tinned flat copper wire through an automatic rolling and compounding machine, and has the advantages of softness, foldability, thin thickness, small volume, simple connection, convenience in disassembly and the like. The method is widely applied to various signal transmissions of products such as printers, copiers, sound equipment, liquid crystal displays and the like, which are connected between the printing heads and the main board of the printers.
The reinforcing plate is attached to the end surface of the FFC wire to ensure the required mounting strength. The FFC wire rod on the market at present uses under long-term high temperature environment, and the reinforcing plate appears local laminating power easily and descends, drops easily to and quick ageing inefficacy scheduling problem.
Disclosure of Invention
The invention aims to provide an adhesive with high weather resistance and high adhesive force, which comprises the following components: 50-80 parts of saturated polyester resin A, 10-35 parts of saturated polyester resin B and 10-25 parts of functional master batch.
The invention also provides an FFC wire reinforcing plate which combines the insulating film layer, the hot melt adhesive layer and the ink layer.
In order to achieve the purpose, the invention adopts the following technical scheme:
an adhesive with high weather resistance and high adhesive force, comprising: 50-80 parts of saturated polyester resin A, 10-35 parts of saturated polyester resin B and 10-25 parts of functional master batch;
the functional master batch comprises the following raw materials in parts by mass: 80-90% of unsaturated polyester resin C, 2-12% of acrylate monomer, 0.5-5% of stabilizer and the balance of filler.
Further, the molecular weight of the saturated polyester resin A is 20000-30000, and the glass transition temperature Tg is 12-30 ℃; the molecular weight of the saturated polyester resin B is 30000-40000, and the glass transition temperature Tg is-10-10 ℃; the molecular weight of the unsaturated polyester resin C is 30000-40000, and the glass transition temperature Tg is 40-80 ℃.
More specifically, the stabilizer is one or a mixture of two or more of 2- (2-hydroxy-5-methylphenyl) benzotriazole, 2-hydroxy-4-methoxybenzophenone and 2-hydroxy-4-n-octoxybenzophenone.
The acrylate monomer is one or a mixture of two or more of trimethylolpropane triacrylate, pentaerythritol tetraacrylate, triallyl isocyanurate, trimethylolpropane diacrylate, ditrimethylolpropane diacrylate, 1, 6-ethylene glycol diacrylate, tricyclodecane dimethanol diacrylate and tridecyl acrylate isopropenyl acrylate.
More specifically, the filler is any one or a mixture of more of air silicon, mica, talcum powder, wollastonite and kaolin.
Further, the preparation method comprises the following steps:
(1) putting the unsaturated polyester resin C into a mixing kettle, premixing for 2 minutes, adding an acrylate monomer, uniformly mixing, adding a stabilizer and a filler, uniformly mixing, and extruding, cooling and granulating at the processing temperature of 100-180 ℃ to obtain functional master batches;
(2) and (2) uniformly putting the saturated polyester resin A, the saturated polyester resin B and the functional master batch in the step (1) into a film coating machine with the processing temperature of 120-200 ℃.
An FFC wire reinforcing plate comprises a hot melt adhesive layer and an ink layer;
the hot melt adhesive layer is attached to the ink layer; the hot melt adhesive layer is prepared from the adhesive.
Further, the method further comprises the following steps: an insulating thin film layer;
the insulating film layer, the ink layer and the hot melt adhesive layer are sequentially attached from top to bottom;
the thickness of the insulating film layer is 100-300 mu m; the thickness of the hot melt adhesive layer is 10-80 μm; the thickness of the ink layer is 1-5 μm.
Further, the insulating film layer is prepared by mixing any one or more than two of PET, PBT, PI, PPS and PC.
The invention has the beneficial effects that:
according to the invention, by selecting the polyester resins with different glass transition temperatures and adopting the functional resin added with the stabilizer, the bonding force of the reinforcing plate to the FFC flat cable is improved, the thermal stability in the production process and the temperature resistance in long-term application are improved, the problem of thickness fluctuation of the polyester resin in the high-temperature processing production process due to thermal instability can be effectively avoided, the reinforcing plate with uniform thickness is obtained, and the reinforcing plate is also applied to the FFC wire rod, is especially suitable for long-term high-temperature environment, and has high weather resistance and high bonding strength retention capability.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments.
An adhesive with high weather resistance and high adhesive force, comprising: 50-80 parts of saturated polyester resin A, 10-35 parts of saturated polyester resin B and 10-25 parts of functional master batch;
the functional master batch comprises the following raw materials in parts by mass: 80-90% of unsaturated polyester resin C, 2-12% of acrylate monomer, 0.5-5% of stabilizer and the balance of filler.
According to the invention, by selecting the polyester resins with different glass transition temperatures and adopting the functional resin added with the stabilizer, the bonding force of the reinforcing plate to the FFC flat cable and the long-term application temperature resistance are improved, the thermal stability and the long-term application temperature resistance in the production process are improved, the problem of thickness fluctuation of the polyester resin in the high-temperature processing production process due to thermal instability can be effectively avoided, the reinforcing plate with uniform thickness is obtained, and the reinforcing plate is also applied to the FFC wire, is particularly suitable for a long-term high-temperature environment, and has high weather resistance and high bonding strength maintaining capability.
Further, the molecular weight of the saturated polyester resin A is 20000-30000, and the glass transition temperature Tg is 12-30 ℃; the molecular weight of the saturated polyester resin B is 30000-40000, and the glass transition temperature Tg is-10-10 ℃; the molecular weight of the unsaturated polyester resin C is 30000-40000, and the glass transition temperature Tg is 40-80 ℃.
Furthermore, the glass transition temperatures Tg of the saturated polyester resin a, the saturated polyester resin B and the unsaturated polyester resin C of the present invention should be controlled within the above ranges, because each Tg needs to be strictly controlled within the range, so as to ensure that the weather resistance and the adhesion of the present invention can be fully embodied, and if the physical property requirements of each polyester resin are not adopted, the flexibility, the adhesion strength, the high temperature resistance and the processing stability of the hot glue layer cannot be guaranteed.
More specifically, the stabilizer is one or a mixture of two or more of 2- (2-hydroxy-5-methylphenyl) benzotriazole, 2-hydroxy-4-methoxybenzophenone and 2-hydroxy-4-n-octoxybenzophenone.
The acrylate monomer is one or a mixture of two or more of trimethylolpropane triacrylate, pentaerythritol tetraacrylate, triallyl isocyanurate, trimethylolpropane diacrylate, ditrimethylolpropane diacrylate, 1, 6-ethylene glycol diacrylate, tricyclodecane dimethanol diacrylate and tridecyl acrylate isopropenyl acrylate.
Furthermore, the addition of the acrylic monomer is to improve the bonding strength by the grafting reaction with the unsaturated polyester resin C, and if the addition amount is too low, the bonding strength is low; if the addition amount is too high, the reaction is incomplete, residues appear, and the formula cost is increased.
More specifically, the filler is any one or a mixture of more of air silicon, mica, talcum powder, wollastonite and kaolin.
Further, the preparation method comprises the following steps:
(1) putting the unsaturated polyester resin C into a mixing kettle, premixing for 2 minutes, adding an acrylate monomer, uniformly mixing, adding a stabilizer and a filler, uniformly mixing, and extruding, cooling and granulating at the processing temperature of 100-180 ℃ to obtain functional master batches;
(2) and (2) uniformly putting the saturated polyester resin A, the saturated polyester resin B and the functional master batch in the step (1) into a film coating machine with the processing temperature of 120-200 ℃.
An FFC wire reinforcing plate made of a binder comprises a hot melt adhesive layer and an ink layer;
the hot melt adhesive layer is attached to the ink layer; the hot melt adhesive layer is prepared from the adhesive.
Further, the method further comprises the following steps: an insulating thin film layer;
the insulating film layer, the ink layer and the hot melt adhesive layer are sequentially attached from top to bottom;
the thickness of the insulating film layer is 100-300 mu m; the thickness of the hot melt adhesive layer is 10-80 μm; the thickness of the ink layer is 1-5 μm.
If the thickness of the insulating film layer is less than 100 mu m, the strength is insufficient, and the insulating effect cannot be achieved; if the thickness is more than 300 μm, the hardness is too high, the heat conductivity during the packaging process is poor, and the adhesive is not firm and is easy to fall off.
If the thickness of the ink layer is less than 1 mu m, the adsorption force of the ink and the hot melt adhesive layer is low; above 5 μm, the layer delaminates easily.
If the thickness of the hot melt adhesive layer is less than 10 μm, insufficient adhesion will result; above 80 μm, the cost increases and the improvement of the adhesive force is not significant.
Further, the insulating film layer is prepared by mixing any one or more than two of PET, PBT, PI, PPS and PC.
And (3) performance testing:
1. room temperature peel force (PET tack): the reinforcing plate with the width of 1 inch is attached to the FFC cable wire through a hot-pressing wire machine, and a 180-degree peel force test is performed.
2. 60 ℃, 95% RH, 96H peel force (sticky PET): a reinforcing plate with the width of 1 inch is attached to an FFC cable wire through a hot wire pressing machine, then the FFC cable wire is placed in a constant-temperature constant-humidity aging box with the ambient temperature of 60 ℃ and the humidity of 95% for 96 hours, a sample is taken out and subjected to 180-degree peel force test, and the result is that the FFC cable wire is qualified, wherein the N/in is not less than 80N/in.
3.60 ℃, 96H peel force (sticky PET): and (3) sticking a reinforcing plate with the width of 1 inch on the FFC cable wire through a hot-pressing wire machine, placing the reinforcing plate in an oven with the ambient temperature of 60 ℃ for 96 hours, and taking out the reinforcing plate to perform 180-degree peel force test. The result is more than or equal to 80N/in, and the product is qualified.
4. Fishing at 60 ℃ and 96H: the reinforcing plate with the width of 1 inch is attached to an FFC cable wire through a hot wire pressing machine, the reinforcing plate is placed in an oven iron frame with the ambient temperature of 60 ℃, the front end of the reinforcing plate is exposed by 3-5 mm, a weight of 250g is hung by a hook, the reinforcing plate is placed for 96 hours, and whether the reinforcing plate is separated from the FFC cable wire or not is observed.
Example A:
an FFC wire reinforcing plate is prepared by the following steps:
(1) putting the unsaturated polyester resin C into a mixing kettle, premixing for 4 minutes, adding the acrylate monomer with the formula amount, uniformly mixing, adding the stabilizer and the filler, uniformly mixing according to the table 1, and extruding, cooling and granulating at the processing temperature of 150 ℃ to obtain functional master batches;
(2) uniformly mixing the saturated polyester resin A, the saturated polyester resin B and the functional master batch in the step (1) according to the proportion in the table 1, putting the mixture into a laminating machine with the processing temperature of 180 ℃, laminating the hot melt adhesive on the base material which is pre-coated with the ink, and cooling, drawing and rolling the base material to obtain the high-weather-resistance and high-adhesion FFC wire reinforcing plate.
The glass transition temperature of the polyester resin A is 20 ℃, and the molecular weight is 20000-minus 30000; the glass transition temperature of the saturated polyester resin B is 10 ℃, and the molecular weight is 30000-40000; the unsaturated polyester has a glass transition temperature of 60 ℃ and a molecular weight of 30000-40000. The stabilizer is a combination of 2- (2-hydroxy-5-methylphenyl) benzotriazole and 2-hydroxy-4-methoxybenzophenone. The acrylate monomer is a combination of trimethylolpropane triacrylate and pentaerythritol tetraacrylate. The filler 1 and the filler 2 are used for filling, and are gas silicon, mica and talcum powder.
TABLE 1 component ratios for example A
The above examples A1-A6 were subjected to the above 1-4 test for the properties, and Table 2 was prepared.
TABLE 2 Performance testing of example A
Description of the drawings:
1. as can be seen from the examples A1 and A6, the example A1 has no saturated polyester A, and only uses the filler 1 to replace the saturated polyester A, so that the whole hardness is higher, the whole is rigid, and the whole performance is not good; and has obvious cracking and degumming phenomena in fishing experiments.
2. As can be seen from examples A2 and A6, example A2 lacks saturated polyester B, and is not homogeneous due to the lack of saturated polyester B, and requires further treatment; meanwhile, the properties of the polyester are greatly different from those of the example A6 due to the lack of the saturated polyester B.
3. It is clear from examples A1, A2, A3 and example A6 that example A3 is made of a combination of saturated polyester A and saturated polyester B, and therefore, it is better than examples A1 and A2 in performance, uniform in thickness and free from the phenomenon of impact cracking and degumming, and it is demonstrated that the saturated polyester A and the saturated polyester B can improve the peeling force after temperature resistance, the peeling force after temperature and humidity resistance, and the toughness after temperature resistance of the product when used together. In the embodiment A6, the unsaturated polyester resin C is added to combine the saturated polyester A, the saturated polyester B and the saturated polyester C, for example, the peeling force at normal temperature of the material is 92N/in, and compared with 60N/in of the embodiment A3, the addition of the unsaturated polyester C can effectively improve the bonding force at normal temperature and in the temperature and humidity resistant environment.
4. From example A4 and example A6, it is clear that example A4 has no added acrylate monomer and therefore it is not able to graft with the unsaturated polyester C and therefore has a lower adhesion than example A6.
5. As can be seen from examples A5 and A6, no stabilizer is added in example A5, because the stabilizer is used for heat resistance and oxidation resistance in the reaction and the use process of the product; although the performance is not greatly different at normal temperature, the performance of the embodiment A5 is reduced after 96 hours at 60 ℃; in the embodiment A6, the performance of the alloy is not greatly different from the performance at normal temperature under the environment of 60 ℃ by adding the stabilizer, so that the stability is improved.
Example B:
an FFC wire reinforcing plate is prepared by the following steps:
(1) putting the unsaturated polyester resin C into a mixing kettle, premixing for 4 minutes, adding the acrylate monomer with the formula amount, uniformly mixing, adding the stabilizer and the filler, uniformly mixing, extruding, cooling and granulating at the processing temperature of 150 ℃ to obtain functional master batches;
(2) and (2) uniformly mixing the saturated polyester resin A, the saturated polyester resin B and the functional master batch in the step (1) in proportion, putting the mixture into a laminating machine with the processing temperature of 180 ℃, laminating the hot melt adhesive on the base material which is pre-coated with the ink, and cooling, drawing and rolling the base material to obtain the high-weather-resistance and high-adhesion FFC wire reinforcing plate.
The stabilizer is a combination of 2- (2-hydroxy-5-methylphenyl) benzotriazole and 2-hydroxy-4-methoxybenzophenone. The acrylate monomer is tricyclodecane dimethanol diacrylate. The filler is a combination of mica and talc.
In the present example, examples B1-B7, examples B8-B14 and examples B15-B21 were prepared from the saturated polyesters A, the saturated polyesters B and the unsaturated polyesters C having different glass transition temperatures, as shown in tables 3, 4 and 5.
TABLE 3 glass transition temperature study of saturated polyesters A
Description of the drawings:
in this example B1-example B7, the saturated polyester A of example B2 had a glass transition temperature 2 ℃ higher than that of the saturated polyester A of example B1, but the peel strength after heat and moisture resistance was 80N/in, which was 8N/in higher than that of example B1; the stripping force after the temperature resistance of the embodiment B2 is 83N/in, which is 9N/in higher than that of the embodiment B1; in example B3, the saturated polyester A was 12 ℃ but 2 ℃ higher than that in example B2, the peel force after heat and humidity resistance was 82N/in (only 2N/in higher than that in example B2), the peel force after heat and humidity resistance was 84 (1N/in higher than that in example B2), and the improvement rate of both adhesive forces was small; illustrating the maximum increase from the glass transition temperature between 10 ℃ and 12 ℃;
after 12 ℃ 12-30 ℃ between example B2 and example B6; the peeling force after temperature and humidity resistance is stabilized between 80N/in and 87N/in, and the peeling capacity after temperature and humidity resistance is stabilized between 83N/in and 89N/in; in example B7, after the glass transition temperature of the saturated polyester A was increased to 32 ℃ continuously, the glass transition temperature of the polyester A in example B7 was only 2 ℃ higher than that in example B6, the peel strength after heat and humidity resistance and the peel strength after heat and humidity resistance were rather decreased, and the heat-resistant sticky PET was decreased by 7N/in; the temperature resistant stripping force is reduced by 6N/in; the glass transition temperature change of the saturated polyester A has great influence on the performance of the reinforcing plate; the glass transition temperature is shown as 30 ℃ and is the end point value within the optimum performance range.
As shown above, the saturated polyester A in the present scheme has the best performance when the glass transition temperature is 12-30 ℃.
TABLE 4 glass transition temperature study of saturated polyesters B
Description of the drawings:
as can be seen from examples B8-B14, the glass transition temperature of the saturated polyester B of example B8 was controlled at-11 ℃ and the glass transition temperature of the saturated polyester B of example B9 was controlled at-10 ℃, but the improvement effects of the heat and moisture resistant peeling force and the heat resistant peeling force of example B9 were significant, and the 6N/in heat and moisture resistant peeling force and the 7N/in heat resistant peeling force could be improved by increasing the glass transition temperature of 1 ℃; the improvement rate is large compared with example B10, because the glass temperature of the saturated polyester B in example B10 is 5 ℃ higher than that in example B9, but the effect of improving the peeling force is not as obvious as the effect of 1 ℃ higher than that in example B8 in example B9, and it can be judged that the examples B9-B13 are the initial values in the optimal effect range; after the value is reached, the peeling force after temperature and moisture resistance and the peeling force after temperature resistance are improved more stably. After the glass transition temperature of the saturated polyester B reaches 10 ℃, the peeling force is unchanged, but the mechanical strength after temperature resistance is insufficient, and the toughness is insufficient after the glass temperature is continuously increased to 12 ℃; in the post-wet hang test, there was a slight crack; the glass transition temperature of the saturated polyester in the scheme is within-10-10 ℃, which is the best effect range.
TABLE 5 glass transition temperature study of unsaturated polyesters C
Description of the drawings:
examples B15, B21 and examples B16 to B20 show; the unsaturated polyester C of examples B16-B20 had a glass transition temperature of 40-80 ℃ and continued to increase to 72 ℃ in example B19 with the glass transition temperature of 40 ℃ in example B16. the peel strength after resistance to heat and humidity of example B19 was optimal at 90N/in and 92N/in; after reaching the maximum value, when the glass transition temperature of the unsaturated polyester C is continuously increased, the performance begins to be slightly reduced at the position of example B20, but the effect is still poor; however, when the glass transition temperature of the unsaturated polyester C is further increased to 82 ℃ thereafter, the heat resistant peeling force of the example B21 is slightly reduced, but the heat resistant adhesive force is greatly reduced, and is reduced to 78N/in from 87N/in of the example B20; it is stated that the glass transition temperature of the unsaturated polyester C of the present embodiment should not exceed 80 ℃. Similarly, in example B15, the glass transition temperature of the unsaturated polyester C was too low, so that when the glass transition temperature was increased, the glass transition temperature was greatly increased to 83N/in (peeling force after heat resistance and moisture resistance) and 84N/in (peeling force after heat resistance) of example B16.
Through the tests of the two endpoint values, the invention confirms that the glass transition temperature of the unsaturated polyester C is within 40-80 ℃, particularly not more than 80 ℃, and the optimal range of the product performance can be ensured.
To summarize:
the combination of the saturated polyester A, the saturated polyester B and the unsaturated polyester C is carried out in a specified proportion, and the adhesive of the invention has the best appearance, mechanical property, normal temperature adhesion and adhesion after temperature and humidity resistance under the actions of the saturated polyester A at 12-30 ℃, the saturated polyester B at-10 ℃ and the unsaturated polyester C at the best glass transition temperature of 40 ℃.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (8)
1. The application of the adhesive with high weather resistance and high adhesive force in preparing the FFC wire reinforcing plate is characterized in that the adhesive is used for preparing a hot melt adhesive layer of an FFC wire; the adhesive comprises the following components in parts by weight: 50-80 parts of saturated polyester resin A, 10-35 parts of saturated polyester resin B and 10-25 parts of functional master batch;
the functional master batch comprises the following raw materials in parts by mass: 80-90% of unsaturated polyester resin C, 2-12% of acrylate monomer, 0.5-5% of stabilizer and the balance of filler;
the molecular weight of the saturated polyester resin A is 20000-30000, and the glass transition temperature Tg is 12-30 ℃; the molecular weight of the saturated polyester resin B is 30000-40000, and the glass transition temperature Tg is-10-10 ℃; the molecular weight of the unsaturated polyester resin C is 30000-40000, and the glass transition temperature Tg is 40-80 ℃.
2. The use of the highly weather-resistant and highly adhesive binder according to claim 1 for the preparation of FFC wire reinforcements, wherein the stabilizer is one or a mixture of two or more of 2- (2-hydroxy-5-methylphenyl) benzotriazole, 2-hydroxy-4-methoxybenzophenone and 2-hydroxy-4-n-octoxybenzophenone.
3. The use of the highly weather-resistant and highly adhesive according to claim 1, wherein the acrylate monomer is one or a mixture of two or more selected from trimethylolpropane triacrylate, pentaerythritol tetraacrylate, triallyl isocyanurate, trimethylolpropane diacrylate, ditrimethylolpropane diacrylate, tricyclodecane dimethanol diacrylate, and tridecyl acrylate isopropenyl acrylate.
4. The use of the adhesive with high weather resistance and high adhesion force in the preparation of FFC wire reinforcing plates according to claim 1, wherein the filler is any one or more of air silicon, mica, talcum powder, wollastonite and kaolin.
5. The use of the adhesive with high weather resistance and high adhesion force according to claim 1 in the preparation of an FFC wire reinforcing plate, wherein the preparation method of the adhesive comprises the following steps:
(1) putting the unsaturated polyester resin C into a mixing kettle, premixing for 2 minutes, adding an acrylate monomer, uniformly mixing, adding a stabilizer and a filler, uniformly mixing, and extruding, cooling and granulating at the processing temperature of 100-180 ℃ to obtain functional master batches;
(2) and (2) uniformly putting the saturated polyester resin A, the saturated polyester resin B and the functional master batch in the step (1) into a film coating machine with the processing temperature of 120-200 ℃.
6. An FFC wire reinforcing plate, comprising: the ink layer and the hot melt adhesive layer;
preparing the hot melt adhesive layer by using the adhesive with high weather resistance and high adhesion force as defined in any one of claims 1 to 5 in the preparation of an FFC wire reinforcing plate; the hot melt adhesive layer is attached to the ink layer.
7. The FFC wire stiffener of claim 6, further comprising: an insulating thin film layer;
the insulating film layer, the ink layer and the hot melt adhesive layer are sequentially attached from top to bottom;
the thickness of the insulating film layer is 100-300 mu m; the thickness of the hot melt adhesive layer is 10-80 μm; the thickness of the ink layer is 1-5 μm.
8. The FFC wire reinforcing plate of claim 7, wherein the insulating film layer is prepared by mixing any one or more than two of PET, PBT, PI, PPS and PC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910848278.7A CN110551473B (en) | 2019-09-09 | 2019-09-09 | High-weather-resistance high-adhesion-force adhesive and FFC wire reinforcing plate |
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