Biaxially oriented poly lactic acid (BOPLA) thermal contraction type film for high-speed automatic packaging machine, and preparation method of BOPLA thermal contraction type film
An automatic packaging machine, heat shrinking technology, applied in applications, household utensils, flat products, etc., can solve the problems of poor thermal stability, brittle usability, difficult to meet the film, etc., to achieve good thermal stability, improved flexibility, improved The effect of surface properties
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[0029] Example one
[0030] The preparation method of BOPLA heat-shrinkable film for high-speed automatic packaging machine has the following steps:
[0031] (1) Prepare materials
[0032] Prepare polylactic acid resin, nano-scale silica, and silane coupling agent KH550. Among them, according to the mass ratio, the ratio of high molecular weight polylactic acid resin to low molecular weight polylactic acid resin is 10:1, and the nano-scale inorganic filler is total polylactic acid The amount of resin is 0.8%, and the silane coupling agent is 1% of the amount of inorganic filler.
[0033] (2) Masterbatch preparation
[0034] Put the nano-scale inorganic filler into a solid mixer, spray the silane coupling agent solution on the filler, stir at high speed for 30 minutes, and then dry it at a temperature of 120° C. for 2 hours. The polylactic acid resin and the processed nano-scale inorganic filler are uniformly stirred by a mixer, and then the mixture is extruded and granulated by a twin...
Example Embodiment
[0043] Example two
[0044] The preparation method of BOPLA heat-shrinkable film for high-speed automatic packaging machine has the following steps:
[0045] (1) Prepare materials
[0046] Prepare polylactic acid resin, nano-scale silica, and silane coupling agent KH560. In terms of mass ratio, the ratio of high-molecular-weight polylactic acid resin to low-molecular-weight polylactic acid resin is 1:1, and nano-scale inorganic filler is total polylactic acid. The amount of resin is 0.6%, and the silane coupling agent is 0.1% of the amount of inorganic filler.
[0047] (2) Masterbatch preparation
[0048] Put the nano-scale inorganic filler into a solid mixer, spray the silane coupling agent solution on the filler, stir at high speed for 30 minutes, and then dry it at a temperature of 120° C. for 2 hours. The polylactic acid resin and the processed nano-scale inorganic filler are uniformly stirred by a mixer, and then the mixture is extruded and granulated by a twin-screw extruder, wh...
Example Embodiment
[0057] Example three
[0058] The preparation method of BOPLA heat-shrinkable film for high-speed automatic packaging machine has the following steps:
[0059] (1) Prepare materials
[0060] Prepare polylactic acid resin, nanometer calcium carbonate, silane coupling agent KH550, among which, according to the mass ratio, the ratio of high molecular weight polylactic acid resin to low molecular weight polylactic acid resin is 20:1, and nanometer inorganic filler is total polylactic acid resin The dosage is 1.2%, and the silane coupling agent is 1.5% of the inorganic filler.
[0061] (2) Masterbatch preparation
[0062] Put the nano-scale inorganic filler into a solid mixer, spray the silane coupling agent solution on the filler, stir at high speed for 30 minutes, and then dry it at a temperature of 120° C. for 2 hours. The polylactic acid resin and the processed nano-scale inorganic filler are uniformly stirred by a mixer, and then the mixture is extruded and granulated by a twin-screw ...
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