A kind of high adhesion high brightness label film and preparation method thereof
A high-brightness, labeling technology, applied in the field of label films, can solve the problems of poor adhesion, poor user experience, and short service life of label films, and achieve the effects of easy processing, small damage, and improved service life
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[0028]The present invention also proposes a method for preparing a high-adhesion and high-brightness label film as described in any one of the above, including the following steps: dust removal: after mixing the raw materials of layer A, layer B, and layer C uniformly, compress them with compressed air Dust removal treatment; extrusion plasticization: Add the dust-removed A layer, B layer and C layer raw materials to the feed ends of three single-screw extruders, melt and plasticize through co-extrusion die casting extrusion Composite melt is obtained; cooling and shaping: the composite melt is transported to the embossing roller group, rapidly cooled and shaped to form a composite film; edge trimming and corona treatment: the composite film is introduced into an edge trimmer, and the composite film is The edge of the edge is trimmed, and the composite film after trimming is subjected to corona treatment by a corona machine; curling: the composite film after corona treatment is...
Embodiment 1
[0038] Dust removal: Weigh 68% of high-density polyethylene, 15% of low-density polyethylene and 17% of maleic anhydride grafted polyethylene from layer A and layer C, and weigh 62.5% of high-density polyethylene from layer B , 28.4% low-density polyethylene and 9.1% titanium dioxide pink masterbatch. After mixing the raw materials of A layer, B layer and C layer separately, use compressed air to remove dust, and the dust-treated outer layer raw materials , The middle layer raw material and the inner layer raw material are dried separately, the drying time is 90min, and the drying temperature is 100°C;
[0039] Extrusion and plasticization: Add the dust-removed A layer, B layer and C layer raw materials to the feed ends of three single-screw extruders, melt and plasticize, and flow through the co-extrusion die to obtain a composite melt. Body, A layer and C layer single-screw extruder temperature is: feed section temperature is 185 ° C, melting section temperature is 200 ° C, ...
Embodiment 2
[0044] Dust removal: Weigh 63% high-density polyethylene, 27% low-density polyethylene, and 10% chlorinated polyethylene from layer A and layer C; weigh 64.999% high-density polyethylene and 0.001% from layer B The color masterbatch and 35% low-density polyethylene, after mixing the raw materials of A layer, B layer and C layer respectively, use compressed air to dedust them, and the dust-treated outer layer raw materials, middle layer raw materials and The inner layer raw materials are dried separately, the drying time is 90min, and the drying temperature is 100°C;
[0045] Extrusion and plasticization: Add the dust-removed A layer, B layer and C layer raw materials to the feed ends of three single-screw extruders, melt and plasticize, and flow through the co-extrusion die to obtain a composite melt. Body, A layer and C layer single-screw extruder temperature: feed section temperature is 190°C, melting section temperature is 210°C, homogenization section temperature is 230°C,...
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