阅读说明：本技术 一种高耐候高粘接力的粘结剂和ffc线材补强板 (high-weather-resistance high-adhesion-force adhesive and FFC wire reinforcing plate ) 是由 李政 陈育淳 于 2019-09-09 设计创作，主要内容包括：一种高耐候高粘接力的粘结剂和FFC线材补强板,该粘结剂包括：50-80份饱和聚酯树脂A、10-35份饱和聚酯树脂B、10-25份功能母粒；所述功能母粒包括：80-90％的不饱和聚酯树脂C、2-12％的丙烯酸酯单体、0.5-5％的稳定剂和余量的填料。该FFC线材补强板设有绝缘薄膜层、所述热熔胶层和所述油墨层；本发明通过选择不同玻璃化温度的聚酯树脂,采用添加稳定剂的功能树脂,既提高了补强板对FFC排线的粘接力,又提高了生产过程热稳定性和长期应用耐温性,能够有效避免聚酯树脂因热不稳定性在高温加工生产过程中的厚度波动问题。(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.)

1. An adhesive with high weather resistance and high adhesive force is characterized by 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.

2. The binder with high weather resistance and high adhesion as claimed in claim 1, wherein 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 ℃.

3. The adhesive with high weather resistance and high adhesive force as claimed in claim 2, wherein the stabilizer is one or a mixture of more than two of 2- (2-hydroxy-5-methylphenyl) benzotriazole, 2-hydroxy-4-methoxybenzophenone and 2-hydroxy-4-n-octoxybenzophenone.

4. the adhesive with high weather resistance and high adhesive force as claimed in claim 2, wherein the acrylate monomer is one or a mixture of two or more selected from trimethylolpropane triacrylate, pentaerythritol tetraacrylate, triallylisocyanurate, trimethylolpropane diacrylate, ditrimethylolpropane diacrylate, 1, 6-ethylene glycol diacrylate, tricyclodecane dimethanol diacrylate, and tridecyl acrylate isopropenyl acrylate.

5. The adhesive with high weather resistance and high adhesive force as claimed in claim 2, wherein the filler is one or more of air silicon, mica, talcum powder, wollastonite and kaolin.

6. The adhesive with high weather resistance and high adhesive force as claimed in claim 2, wherein the preparation method comprises the steps of:

(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 ℃.

7. an FFC wire reinforcing plate made of the adhesive according to any one of claims 1 to 6, which is characterized by comprising 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.

8. the FFC wire stiffener of claim 7, 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.

9. The FFC wire reinforcing plate of claim 8, wherein the insulating film layer is prepared by mixing any one or more of PET, PBT, PI, PPS and PC.

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.