A kind of electronic component packaging paper using and preparation method thereof
Technical field
The invention belongs to pulp technology for making paper, particularly a kind of electronic component packaging paper using and preparation method thereof.
Background technology
Along with the fast development of electronics industry, electronic circuit board integrated level is more and more higher, and the high density of electronic devices and components on motherboard is, the compactness of wiring, the even extensive employing of surface-adhered type element all easily cause electrostatic damage circuit board.Studies have found that the integrated circuit breaking down has 1st/3rd, is punctured by static discharge.Electronics industry is badly in need of having the packaging material of anti-static function.
Early stage antistatic packaging material adopts completion method, graphite or metal fibre is mixed in plastics, forms the wire netting of conduction in plastics inner.The metal web forming on this ambroin can provide goodish shielding when low frequency (< 100MHz), and when frequency higher (100~1000MHz), the inductive effect of the telegram in reply circulation flow path forming due to fiber web, its shield effectiveness reduces gradually.Therefore,, at the external coated and inner interpolation of material antistatic additive, the packaging material that reach electrostatic dissipation and shielding object by chemical technology more and more come into one's own.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of electronic component packaging paper using and preparation method thereof, after adding PAE, AKD and cationic starch after utilizing bleached sulphate softwood pulp and cotton pulp to mix, prepare paper-based substrate, on paper substrate, spray polyurethane insulating varnish by hot-pressing processing, the electronic component packaging paper tensile strength of preparation is large, bursting strength, tearability are all higher, and insulation effect is good.
To achieve these goals, the technical solution used in the present invention is:
An electronic component packaging paper using is quantitatively 50~60g/m
2, thickness is 0.21~0.28mm, and tensile strength is 2.15~2.50kN/m, and bursting strength is 90.4~107.3kPa, and tearability is 190~215mN, resistance is 1.5 * 10
11~3.7 * 10
11Ω/cm.
The present invention provides the preparation method of described electronic component packaging paper using simultaneously, softwood pulp and cotton pulp are mixed, adding daiamid epoxy chloropropane (PAE), alkyl ketene dimer (AKD) and cationic starch is chemical assistant, after wet papermaking process becomes paper at its surface spraying insulation enamelled coating, then by making after hot-pressing processing.
Described softwood pulp is bleached sulphate softwood pulp, and making beating is to 30~40 ° of SR; Cotton pulp is commodity cotton pulp, and making beating is to 50~60 ° of SR.
After described softwood pulp and cotton pulp mix, the percentage by weight of softwood pulp is 80%~90%, the percentage by weight 10%~20% of cotton pulp.
The addition of described PAE, AKD and cationic starch is respectively 0.2%, 0.2% and 1% of mixed slurry gross weight.
The insulated paint of described surface spraying is polyurethane insulating varnish, and spray flux accounts for into 5%~10% of paper gross weight.
The condition of described hot-pressing processing is 105 ℃ of hot pressing temperatures, hot pressing time 20~30min.
Needlebush of the present invention can adopt as masson pine, larch, Korean pine, dragon spruce etc.
The preparation process of described PAE is: the ratio that is 1: 1.5: 1.02 in molar ratio by adipic acid, triethylene tetramine and p-methyl benzenesulfonic acid mixes, controlling temperature is 150~175 ℃, successive reaction synthesizing polyamides performed polymer, in synthetic polyamide prepolymer aggressiveness, add distilled water, after being cooled to 40 ℃, add methacrylic acid, its addition is 10% of adipic acid, after stirring, under constant voltage, drip epoxychloropropane, dripping quantity is 1.5 times of adipic acid, heating and thermal insulation regulates cessation reaction between pH value to 3~5 to make when viscosity reaches 100~150mPas.
Compared with prior art, the invention has the beneficial effects as follows:
(1) the electronic component packaging paper paper substrate making adopts wet papermaking process preparation, and technical maturity is convenient.
(2) both are in conjunction with tight after hot pressing on paper substrate, to spray polyurethane insulating varnish, and insulation effect persistence is better.In preparation process, cotton fiber accounts for major part, and the electronic component packaging paper making is soft, easy to use.
The specific embodiment
Below in conjunction with embodiment, describe embodiments of the present invention in detail.
Embodiment 1:
By bleached sulphate softwood pulp beating degree to 30 ° SR, commodity cotton pulp beating degree to 50 ° SR, mixes both, and bleached sulphate softwood pulp accounts for mixture total weight amount 80%, and commodity cotton pulp accounts for mixture total weight amount 20%; Add PAE, AKD and cationic starch, adding proportion is respectively 0.2%, 0.2% and 1% of mixed slurry gross weight; Through wet papermaking process, become paper rear surface spray polyurethane insulating varnish, spray flux accounts for into 5% of paper gross weight; Then through hot-pressing processing, 105 ℃ of hot pressing temperatures, hot pressing time 20min, gets product.
Gained finished product is quantitative 50~54g/m after measured
2, thickness 0.21~0.24mm, tensile strength 2.15~2.21kN/m, bursting strength 90.4~103.3kPa, tearability 197~210mN, resistance 1.5 * 10
11Ω/cm.
Embodiment 2:
By bleached sulphate softwood pulp beating degree to 40 ° SR, commodity cotton pulp beating degree to 60 ° SR, mixes both, and bleached sulphate softwood pulp accounts for mixture total weight amount 90%, and commodity cotton pulp accounts for mixture total weight amount 10%; Add PAE, AKD and cationic starch, adding proportion is respectively 0.2%, 0.2% and 1% of mixed slurry gross weight; Through wet papermaking process, become paper rear surface spray polyurethane insulating varnish, spray flux accounts for into 5% of paper gross weight; Then through hot-pressing processing, 105 ℃ of hot pressing temperatures, hot pressing time 30min, gets product.
Gained finished product is quantitative 53~56g/m after measured
2, thickness 0.21~0.25mm, tensile strength 2.19~2.37kN/m, bursting strength 95.4~101.3kPa, tearability 190~206mN, resistance 1.8 * 10
11Ω/cm.
Embodiment 3:
By bleached sulphate softwood pulp beating degree to 35 ° SR, commodity cotton pulp beating degree to 55 ° SR, mixes both, and bleached sulphate softwood pulp accounts for mixture total weight amount 80%, and commodity cotton pulp accounts for mixture total weight amount 20%; Add PAE, AKD and cationic starch, adding proportion is respectively 0.2%, 0.2% and 1% of mixed slurry gross weight; Through wet papermaking process, become paper rear surface spray polyurethane insulating varnish, spray flux accounts for into 10% of paper gross weight; Then through hot-pressing processing, 105 ℃ of hot pressing temperatures, hot pressing time 25min, gets product.
Gained finished product is quantitative 55~60g/m after measured
2, thickness 0.25~0.28mm, tensile strength 2.19~2.44kN/m, bursting strength 95.4~106.3kPa, tearability 197~215mN, resistance 3.6 * 10
11Ω/cm.
Embodiment 4:
By bleached sulphate softwood pulp beating degree to 30 ° SR, commodity cotton pulp beating degree to 60 ° SR, mixes both, and bleached sulphate softwood pulp accounts for mixture total weight amount 80%, and commodity cotton pulp accounts for mixture total weight amount 20%; Add PAE, AKD and cationic starch, adding proportion is respectively 0.2%, 0.2% and 1% of mixed slurry gross weight; Through wet papermaking process, become paper rear surface spray polyurethane insulating varnish, spray flux accounts for into 10% of paper gross weight; Then through hot-pressing processing, 105 ℃ of hot pressing temperatures, hot pressing time 20min, gets product.
Gained finished product is quantitative 55~60g/m after measured
2, thickness 0.25~0.28mm, tensile strength 2.19~2.44kN/m, bursting strength 95.4~106.3kPa, tearability 197~215mN, resistance 3.6 * 10
11Ω/cm.
Wherein in the present embodiment, the preparation process of described PAE is: the ratio that is 1: 1.5: 1.02 in molar ratio by adipic acid, triethylene tetramine and p-methyl benzenesulfonic acid mixes, controlling temperature is 175 ℃, successive reaction synthesizing polyamides performed polymer, in synthetic polyamide prepolymer aggressiveness, add distilled water, after being cooled to 40 ℃, add methacrylic acid, its addition is 10% of adipic acid, after stirring, under constant voltage, drip epoxychloropropane, dripping quantity is 1.5 times of adipic acid, heating and thermal insulation regulates pH value to 5 cessation reaction to make when viscosity reaches 150mPas.