Laminated packaging material
A technology for packaging materials and thermoplastic materials, applied in the field of laminated packaging materials, can solve problems such as energy waste and raw material waste, and achieve the effects of reducing necking phenomenon, good sealing strength, and restraining energy and raw material waste phenomenon.
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[0022] Such as figure 2 As shown, a laminated packaging material of the present invention includes an outermost layer 21 of a thermoplastic material, a core layer 22, an intermediate layer 23 of a thermoplastic material, a barrier layer 24, an adhesive layer 25 and an innermost layer 26 of a thermoplastic material in order from the outside to the inside.
[0023] The innermost layer 26 of the thermoplastic material contains linear low-density polyethylene (MLLDPE) and low-density polyethylene (LDPE) polymerized with a metallocene catalyst, wherein the linear low-density polyethylene (mLLDPE) polymerized with a metallocene catalyst has the following parameters: average density 0.88g / cm 3 ~0.925g / cm 3 , Melt flow index (190℃, 2.16kg) is 5g / 10min~20g / 10min, peak melting point is 85℃~130℃, expansion ratio is 1.2~1.8; low density polyethylene (LDPE) has the following parameters: average density 0.90g / cm 3 ~0.925g / cm 3 , Melt flow index (190℃, 2.16kg) is 5g / 10min~20g / 10min, peak melti...
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