A kind of multi-layer co-extruded embossed film and its preparation method
A technology of co-extrusion and patterned film, which is applied in the field of multi-layer co-extruded patterned film and its preparation, can solve the problems of poor bearing performance of single-layer plastic structure, failure to satisfy consumers, poor air tightness, etc., and achieve low cost , various functions, good sealing effect
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Embodiment 1
[0023] A multi-layer co-extruded textured film, the film is sequentially composed of a first PA layer, a second bonding PE layer, a third EVOH, a fourth bonding PE layer and a fifth PE layer.
[0024] The raw material of the first PA layer has a melting temperature of 230-260°C and a density of 1.08g / cm 3 nylon.
[0025] The raw materials of the second adhesive PE layer and the fourth adhesive PE layer include third LLDPE and fourth LLDPE with a weight ratio of 0.8:1. The third LLDPE has a melt index of 1.5g / 10min and a density of 0.914g / cm 3 The linear low density polyethylene; the fourth LLDPE has a melt index of 1.5g / 10min and a density of 0.916g / cm 3 of linear low density polyethylene.
[0026] The raw material of the third EVOH layer has a melt index of 5.7g / 10min and a density of 1.17g / cm 3 ethylene-vinyl alcohol copolymers.
[0027] The raw materials of the fifth PE layer include LDPE, MLLDPE and fifth LLDPE in a weight ratio of 3:6:1. The LDPE has a melt index of...
Embodiment 2
[0031] A multi-layer co-extruded textured film, the film is sequentially composed of a first PA layer, a second bonding PE layer, a third EVOH, a fourth bonding PE layer and a fifth PE layer.
[0032] The raw material of the first PA layer has a melting temperature of 250°C and a density of 1.18g / cm 3 nylon.
[0033] The raw materials of the second adhesive PE layer and the fourth adhesive PE layer include third LLDPE and fourth LLDPE with a weight ratio of 1.0:1. The third LLDPE has a melt index of 2.0g / 10min and a density of 0.922g / cm 3 The linear low density polyethylene; the fourth LLDPE has a melt index of 2.0g / 10min and a density of 0.920g / cm 3 of linear low density polyethylene.
[0034] The raw material of the third EVOH layer has a melt index of 5.7g / 10min and a density of 1.15g / cm 3 ethylene-vinyl alcohol copolymers.
[0035] The raw materials of the fifth PE layer include LDPE, MLLDPE and fifth LLDPE in a weight ratio of 5:4:1. The LDPE has a melt index of 2.0...
Embodiment 3
[0039] A multi-layer co-extruded textured film, the film is sequentially composed of a first PA layer, a second bonding PE layer, a third EVOH, a fourth bonding PE layer and a fifth PE layer.
[0040] The raw material of the first PA layer has a melting temperature of 235°C and a density of 1.12g / cm 3 nylon.
[0041] The raw materials of the second adhesive PE layer and the fourth adhesive PE layer include third LLDPE and fourth LLDPE with a weight ratio of 1.2:1. The third LLDPE has a melt index of 2.5g / 10min and a density of 0.920g / cm 3 The linear low density polyethylene; the fourth LLDPE has a melt index of 2.0g / 10min and a density of 0.924g / cm 3 of linear low density polyethylene.
[0042] The raw material of the third EVOH layer has a melt index of 5g / 10min and a density of 1.19g / cm 3 ethylene-vinyl alcohol copolymers.
[0043] The raw materials of the fifth PE layer include LDPE, MLLDPE and fifth LLDPE in a weight ratio of 3:5:1. The LDPE has a melt index of 1.8g / ...
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