A kind of antistatic cross-linked heat-shrinkable film and preparation method thereof
A heat shrinkable film, antistatic technology, applied in chemical instruments and methods, synthetic resin layered products, layered products, etc., can solve the problems of printing pattern blooming, failure, heat shrinkable film does not have antistatic effect, etc. Achieve the effect of accelerating release, reducing friction coefficient and improving antistatic effect
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[0033] The present invention also proposes a method for preparing an antistatic cross-linked heat shrinkable film as described in any of the above, comprising the following steps: mixing materials, uniformly mixing the raw materials of the outer layer, the middle layer and the inner layer according to the weight percentage; plasticizing Extrusion, the raw materials of the outer layer, the middle layer and the inner layer are respectively added to the extruder to melt and plasticize to obtain a melt, and the melt enters the co-extrusion die head for the co-extrusion layer; The melt is inflated to obtain a film bubble, and then cooled and shaped to form a film tube; electron irradiation cross-linking, the film tube is drawn to the electron irradiation cross-linking device to generate activation cross-linking; preheating, the cross-linked film tube is used in an oven Preheating; secondary inflation, the preheated film tube is biaxially stretched, and after stretching is completed,...
Embodiment 1
[0042] Mixing, by weight percentage of outer layer 85% low density polyethylene, 10% maleic anhydride graft modified polyethylene, 1% silicone anti-blocking agent, 1% erucamide smoothing agent, 1% % of surfactant type antistatic agent masterbatch, 2% of hydrophilic polymer antistatic masterbatch, 95% of low-density polyethylene in the middle layer, 3% of slip agent, 2% of cross-linking initiator, internal Layer 85% low density polyethylene, 10% maleic anhydride graft modified polyethylene, 1% silicone anti-blocking agent, 1% erucamide slip agent, 1% surfactant type antistatic agent Masterbatch and 2% hydrophilic polymer antistatic masterbatch are mixed evenly;
[0043] Plasticizing extrusion, the outer layer, middle layer and inner layer raw materials are respectively added to the extruder to melt and plasticize to obtain a melt. The extruder includes three heating sections, the feeding section is 160 °C, the melting section is 165 °C, and the homogenization section is 180° C...
Embodiment 2
[0051]Mixing, by weight percentage of outer layer 70% ultra-low density polyethylene, 13% acrylic graft modified polyethylene, 2% silicone anti-blocking agent, 10% erucamide slip agent, 4% of surfactant type antistatic agent masterbatch, 1% hydrophilic polymer antistatic masterbatch, 80% low density polyethylene in the middle layer, 10% slip agent, 10% crosslinking initiator, inner layer 70% ultra-low density polyethylene, 13% acrylic graft modified polyethylene, 5% silicone anti-blocking agent, 10% erucamide slip agent, 1% surfactant type antistatic agent masterbatch , 1% of the hydrophilic polymer antistatic masterbatch, respectively mixed evenly;
[0052] Plasticizing extrusion, the outer layer, middle layer and inner layer raw materials are respectively added to the extruder to melt and plasticize to obtain a melt. The extruder includes three heating sections, the feeding section is 170 °C, the melting section is 180 °C, and the homogenizing section is 190° C.; the co-ext...
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Abstract
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