Linear easy-to-tear composite film or bag
A composite film and straight line technology, which is applied in the field of packaging film and bags, can solve the problems of no improvement in the raw materials and composition of the packaging film, the inability to fully achieve the controllability of straight line tear marks, excellent straight line easy tearability, etc., and achieve strength Good rigidity, high cost performance, and excellent environmental performance
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Embodiment 1
[0039] A linear easy-to-tear composite film, which is divided into an inner layer and an outer layer from the inside to the outside. The outer layer is made of PET plastic. Layer A uses a blend of cycloolefin copolymer B with a mass ratio of 1:4.2 and linear low-density polyethylene as a raw material, and the inner layer B (away from the outer layer) uses a cycloolefin copolymer with a mass ratio of 1:9.5 A blend of A with ethylene-vinyl acetate copolymer was used as the raw material.
[0040] The above-mentioned cyclic olefin copolymer A is obtained by copolymerization of ethylene and molar content of 51% norbornene, and the above-mentioned cyclic olefin copolymer B is obtained by ethylene and molar content of 30% (norbornene is obtained by copolymerization; The outer layer, inner layer A, and inner layer B of the above-mentioned composite film are produced into film products by a dry compounding method.
[0041] The outer layer of the linear easy-to-tear composite film in t...
Embodiment 2
[0045] A linear easy-to-tear composite film, which is divided into inner layer, middle layer and outer layer from the inside to the outside, the outer layer is made of PET, the middle layer is aluminum foil layer, the inner layer is divided into inner layer A and inner layer B, the inner layer Layer A uses a blend of cycloolefin copolymer B and linear low-density polyethylene with a mass ratio of 1:4.8 as raw material, and the inner layer B uses cycloolefin copolymer A and ethylene-acetic acid with a mass ratio of 1:10.5. A blend of vinyl ester copolymers was used as the raw material.
[0046] Above-mentioned cyclic olefin copolymer A is that ethylene and molar content are that 55% norbornene is obtained by copolymerization, and above-mentioned cyclic olefin copolymer B is that ethylene and 34% norbornene are obtained by copolymerization; above-mentioned The inner layer, middle layer and outer layer of the composite film are produced as film products by dry composite method.
...
Embodiment 3
[0050] A linear easy-tear composite film, which is divided into an inner layer, a middle layer and an outer layer from the inside to the outside, the outer layer is made of PET plastic, the middle layer is an aluminum foil layer, and the inner layer is divided into an inner layer A and an inner layer B, The inner layer A uses a blend of cycloolefin copolymer B and linear low-density polyethylene with a mass ratio of 1:4.3 as the raw material, and the inner layer B adopts a mass ratio of 1:10. A blend of vinyl acetate copolymers was used as raw material.
[0051] Above-mentioned cyclic olefin copolymer A is that ethylene and molar content are that 52% norbornene is obtained by copolymerization, and above-mentioned cyclic olefin copolymer B is that ethylene and 33% norbornene are obtained by copolymerization; above-mentioned The outer layer, middle layer and inner layer of the composite film are produced into film products by dry composite method.
[0052] The content of each r...
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