A kind of preparation method of stone paper with high stiffness
A technology of stone paper and paper granules, applied in the field of stone paper preparation, can solve the problems of inconvenient printing and book folding, unfavorable application of stone paper, low stiffness of stone paper, etc. Stiffness effect
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[0021] Such as figure 1 As shown, an embodiment of the present invention discloses a method for preparing stone paper with high stiffness, comprising the following steps:
[0022] Step (1) mixing and drying zinc stearate or magnesium stearate and talcum powder to obtain a mixing aid;
[0023] Step (2) adding the calcium carbonate stone powder, high-density polyethylene and the mixing aid in sequence to the internal mixer for banburying, and then entering the granulator for granulation to form paper granules;
[0024] Step (3) adding the paper pellets into a paper machine and blow molding to produce stone paper with high stiffness.
[0025] In this embodiment, the stiffness of the stone paper is improved by adding a certain amount of dried talc powder and related additives to the granulation aid. The stone paper made by adding talcum powder has high stiffness, which can effectively increase the printing speed and increase the folding efficiency.
Embodiment 1
[0027] First, weigh 1 part by weight of zinc stearate and 3 parts by weight of talc, mix and dry them in a dryer at 60°C for 120 minutes; take the dried mixture as an auxiliary agent, first mix 80 parts by weight of calcium carbonate stone powder, high-density polyethylene Add 16 parts by weight into the internal mixer, and then add the above-mentioned dry and uniform additives into the internal mixer, and banbury together at 195°C. After the internal mixing is completed, then enter the granulator and granulate at 160°C , to obtain paper pellets; put the paper pellets into a paper machine, blow molding at 170°C, and prepare stone paper with high stiffness.
[0028] After testing, the prepared stone paper has a density of 1.14g / cm 3 , The stiffness is 4.02mN.m. The printing speed has been increased from the original 6000 sheets per hour to 8000 sheets per hour, and the folding efficiency has been greatly improved.
Embodiment 2
[0030] First, weigh 3 parts by weight of zinc stearate and 10 parts by weight of talc and mix and dry them for 90 minutes at 70°C in a dryer; Add 17 parts by weight into the internal mixer, and then add the above-mentioned dry and uniform additives into the internal mixer, and banbury together at 200°C. After the internal mixing is completed, then enter the granulator and granulate at 160°C , to obtain paper pellets; put the paper pellets into the paper machine, and blow molding at 160°C to prepare stone paper with high stiffness.
[0031] After testing, the prepared stone paper has a density of 1.05g / cm 3 , The stiffness is 4.35mN.m. The printing speed has been increased from the original 6000 sheets per hour to 9000 sheets per hour, and the folding efficiency has been greatly improved.
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