Linear easy-to-tear composite film or bag
A composite film and straight line technology, which is applied in the field of bags and packaging films, can solve the problems of no improvement in the internal raw materials and composition of the packaging film, the inability to fully achieve the controllability of straight line tear marks, and excellent straight line easy tearability, etc., to achieve strength Good rigidity, high cost performance, and excellent environmental performance
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[0041] Example 1:
[0042] A linear and easy-to-tear composite film. It is divided into an inner layer and an outer layer from the inside to the outside. The outer layer is made of PET plastic. The inner layer is divided into two layers, one of which is the inner layer A (near the outer layer), Layer A uses a blend of cycloolefin copolymer B and linear low-density polyethylene with a mass ratio of 1:4.2 as raw materials, and inner layer B (away from the outer layer) uses cycloolefin copolymer with a mass ratio of 1:9.5 A blend of ethylene-vinyl acetate copolymer is used as a raw material.
[0043] The above-mentioned cyclic olefin copolymer A is obtained by copolymerization of ethylene and 51% by mole content of norbornene, and the above-mentioned cyclic olefin copolymer B is obtained by copolymerization of ethylene and 30% by mole content (norbornene is obtained by copolymerization; The outer layer, inner layer A, and inner layer B of the above-mentioned composite film are produc...
Example Embodiment
[0048] Example 2
[0049] A linear and easy-to-tear composite film. It 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 as the raw material, the middle layer is an aluminum foil layer, and the inner layer is divided into inner layer A and inner layer B. Layer A uses a blend of cycloolefin copolymer B and linear low density polyethylene with a mass ratio of 1:4.8 as raw materials, and 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 is used as a raw material.
[0050] The aforementioned cycloolefin copolymer A is obtained by copolymerization of ethylene and 55% by mole content of norbornene, and the aforementioned cycloolefin copolymer B is obtained by copolymerization of ethylene and 34% by mole content of norbornene; The inner layer, middle layer and outer layer of the composite film are produced as thin film products by ...
Example Embodiment
[0053] Example 3
[0054] A linear and easy-to-tear composite film. It is divided into inner layer, middle layer and outer layer from the inside to the outside. The outer layer is made of PET plastic as raw material, the middle layer is aluminum foil layer, and the inner layer is divided into inner layer A and inner layer B. The inner layer A uses a blend of cyclic olefin copolymer B and linear low density polyethylene with a mass ratio of 1:4.3 as raw materials, and the inner layer B uses a cyclic olefin copolymer A and ethylene with a mass ratio of 1:10. A blend of vinyl acetate copolymer is used as a raw material.
[0055] The aforementioned cycloolefin copolymer A is obtained by copolymerization of ethylene and 52% by mole content of norbornene, and the aforementioned cycloolefin copolymer B is obtained by copolymerization of ethylene and 33% by mole content of norbornene; The outer layer, middle layer, and inner layer of the composite film are produced into thin film products...
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