High heat-sealing thin film and preparation thereof
A film preparation and high heat technology, which is applied in the direction of flat products, other household appliances, flexible coverings, etc., can solve the problems of poor antistatic property, slow resource regeneration, high heat sealing film is difficult to degrade, etc., and achieve good heat sealing performance , water vapor, good elongation and tensile strength effects
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Embodiment 1
[0030] (1) choose the cotton pulp that weight ratio is 40%, the wood pulp of 60%, through breaker, desanding machine, obtain slurry, then through alkalization, pressing, aging, yellowing, dissolving, aging, filtration and The viscose is made by the degassing process, and then the viscose is pumped into the film forming device through the viscose metering pump, and the film is formed through the forming device; the film is put into the desulfurization tank for desulfurization; after desulfurization, it is transferred to the bleaching tank for bleaching. ;
[0031] (2) dechlorination, the film after bleaching is put into the dechlorination tank, adding concentration is 1.5g / L acetic acid addition 4.6kg / ton paper, dechlorination 6 seconds, transfers in the washing tank, washes 35 seconds;
[0032] (3) Anchoring, transfer the film after dechlorination and water washing into the anchoring tank, add melamine formaldehyde resin with a concentration of 0.5g / L and an amount of 1.3kg / to...
Embodiment 2
[0041](1) choose the cotton pulp that weight ratio is 45%, the wood pulp of 55%, through breaker, desanding machine, obtain slurry, then through alkalization, pressing, aging, yellowing, dissolving, ripening, filtration and The degassing process is used to make viscose, and then the viscose is pumped into the film former through the viscose metering pump, and the film is formed through the former; the film is put into the desulfurization tank for desulfurization; after desulfurization, it is transferred to the bleaching tank for bleaching;
[0042] (2) dechlorination, the film after bleaching is put into the dechlorination tank, adding concentration is 1.9g / L acetic acid addition 5.5kg / ton paper, dechlorination 6 seconds, transfers in the washing tank, washes 30 seconds;
[0043] (3) Anchoring, transfer the film after dechlorination and water washing into the anchoring tank, add melamine formaldehyde resin with a concentration of 0.45g / L and an amount of 1.33kg / ton of paper, co...
Embodiment 3
[0052] The processing steps that present embodiment adopts are consistent with embodiment 1, wherein make the following changes:
[0053] (1) choosing weight ratio is 50% cotton pulp, 50% wood pulp;
[0054] (2) dechlorination, adding concentration is 1.7g / L acetic acid addition 5kg / ton of paper, dechlorination 6 seconds, washing 32 seconds;
[0055] (3) Anchoring, adding a concentration of 0.35g / L melamine formaldehyde resin, adding an amount of 1.25kg / ton of paper, controlling the temperature at 27°C, and anchoring for 6 seconds to complete the anchoring;
[0056] (5) Coating preparation, add 1048L of toluene and 2134L of tetrahydrofuran into the mixer respectively, control the temperature at 29°C, under mechanical stirring, slowly add 250Kg of Saran resin, stir mechanically for 62min, gradually increase the temperature to 42°C, and then slowly add E-wax 4.5Kg, behenic acid 4.2Kg and dibutyl phthalate 3.9Kg, stir evenly, then add HK400 anti-tack agent 0.76Kg, stir for 32 mi...
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