Abstract: A high-performance multilayer films for packaging and the structure of the multilayer film is as follows: PO2/POY/PO1/POX/PO3 and PO2/POY/PO1/TIE2/PO3. The multilayer film is obtained by multilayer coextrusion and biaxial stretching. The total thickness of the multilayer film is 8 to 100 micrometers; the absolute values of the differences of the solubility parameters between the PO1 layer and the PO2 layer and between the PO2 layer and PO3 layer is greater than 0.5 (J·cm?3)1/2, and the absolute value of the difference of the cohesive energy density is greater than 5 J/cm3.

Abstract: A high-performance multilayer film for packaging, the structure being: BL/TIE/PO1/POX/PO3, obtained once by multilayer coextrusion and biaxial stretching, wherein: the total thickness of the multilayer film is 8 to 100 micrometers; the absolute value of the difference of the solubility parameters between the PO1 and PO3 layer materials is ?0.1 and ?0.5, and the absolute value of the difference of the cohesive energy density is ?3, and ?5; the solubility parameter and cohesive energy density of the POX bridge material are based on one of the PO1 and PO3 layer materials, and it's transitioned to the other in a gradient way; the absolute value of the difference of the solubility parameters between adjacent layers from the PO1 layer to the POX bridge and the PO3 layer is ?0.1 (J·cm?3)1/2, and the absolute value of the difference of the cohesive energy density is ?3 J/cm3).

Abstract: A degradable EVOH high-barrier composite film, characterized in that the materials of various layers in the composite film all obtain approximately-consistent biodegradability by introducing biomass, and the additive amount of the additive master batch in the materials of each layer is controlled within the range of 0.3-15% of the total mass of the materials of the corresponding layer; the hydrophilic activity of the hydrophilic groups in the additive master batch should be greater than or equal to that of the hydrophilic groups in the materials of each layer; by adding the additive master batch, the mole ratios of the hydrophilic groups to carbon atoms of the materials of various layers tend to be consistent, namely, the bioactivities tend to be consistent, so that the degradation rates of the materials of various layers in the composite film tend to be consistent.

Abstract: A high-performance multilayer film for packaging, the structure being: BL/TIE/PO1/POX/PO3, obtained once by multilayer coextrusion and biaxial stretching, wherein: the total thickness of the multilayer film is 8 to 100 micrometers; the absolute value of the difference of the solubility parameters between the PO1 and PO3 layer materials is ?0.1 and ?0.5, and the absolute value of the difference of the cohesive energy density is ?3, and ?5; the solubility parameter and cohesive energy density of the POX bridge material are based on one of the PO1 and PO3 layer materials, and it's transitioned to the other in a gradient way; the absolute value of the difference of the solubility parameters between adjacent layers from the PO1 layer to the POX bridge and the PO3 layer is ?0.1 (J·cm?3)1/2, and the absolute value of the difference of the cohesive energy density is ?3 J/cm3).

Abstract: A high-performance multilayer film for packaging, the structure being: BL/TIE/PO1/POX/PO3, obtained once by multilayer coextrusion and biaxial stretching, wherein: the total thickness of the multilayer film is 8 to 100 micrometers; the absolute value of the difference of the solubility parameters between the PO1 and PO3 layer materials is ?0.1 and ?0.5, and the absolute value of the difference of the cohesive energy density is ?3, and ?5; the solubility parameter and cohesive energy density of the POX bridge material are based on one of the PO1 and PO3 layer materials, and it's transitioned to the other in a gradient way; the absolute value of the difference of the solubility parameters between adjacent layers from the PO1 layer to the POX bridge and the PO3 layer is ?0.1(J·cm?3)1/2, and the absolute value of the difference of the cohesive energy density is ?3 J/cm3.

Abstract: A high-performance multilayer films for packaging and the structure of the multilayer film is as follows: PO2/POY/PO1/POX/PO3 and PO2/POY/PO1/TIE2/PO3. The multilayer film is obtained by multilayer coextrusion and biaxial stretching. The total thickness of the multilayer film is 8 to 100 micrometers; the absolute values of the differences of the solubility parameters between the PO1 layer and the PO2 layer and between the PO2 layer and PO3 layer is greater than 0.5 (J·cm?3)1/2, and the absolute value of the difference of the cohesive energy density is greater than 5 J/cm3.

Abstract: A degradable EVOH high-barrier composite film, characterized in that the materials of various layers in the composite film all obtain approximately-consistent biodegradability by introducing biomass, and the additive amount of the additive master batch in the materials of each layer is controlled within the range of 0.3-15% of the total mass of the materials of the corresponding layer; the hydrophilic activity of the hydrophilic groups in the additive master batch should be greater than or equal to that of the hydrophilic groups in the materials of each layer; by adding the additive master batch, the mole ratios of the hydrophilic groups to carbon atoms of the materials of various layers tend to be consistent, namely, the bioactivities tend to be consistent, so that the degradation rates of the materials of various layers in the composite film tend to be consistent.

Abstract: A degradable EVOH high-barrier composite film, characterized in that the materials of various layers in the composite film all obtain approximately-consistent biodegradability by introducing biomass, and the additive amount of the additive master batch in the materials of each layer is controlled within the range of 0.3-15% of the total mass of the materials of the corresponding layer; the hydrophilic activity of the hydrophilic groups in the additive master batch should be greater than or equal to that of the hydrophilic groups in the materials of each layer; by adding the additive master batch, the mole ratios of the hydrophilic groups to carbon atoms of the materials of various layers tend to be consistent, namely, the bioactivities tend to be consistent, so that the degradation rates of the materials of various layers in the composite film tend to be consistent.

Abstract: A degradable EVOH high-barrier composite film, characterized in that the materials of various layers in the composite film all obtain approximately-consistent biodegradability by introducing biomass, and the additive amount of the additive master batch in the materials of each layer is controlled within the range of 0.3-15% of the total mass of the materials of the corresponding layer; the hydrophilic activity of the hydrophilic groups in the additive master batch should be greater than or equal to that of the hydrophilic groups in the materials of each layer; by adding the additive master batch, the mole ratios of the hydrophilic groups to carbon atoms of the materials of various layers tend to be consistent, namely, the bioactivities tend to be consistent, so that the degradation rates of the materials of various layers in the composite film tend to be consistent.

Abstract: A composite packaging material includes a top film and a bottom film as the forming film. The up film is BOPP/PE-TIE-PVDC-TIE-PP-PE structure, which is co-extruded by multi-layer flow or inflation film and formed by a solventless dry way; the bottom films has a PP-TIE-PVDC-TIE-PE structure which is co-extruded by multi-layer flow or inflation film. PVDC is homopolymerization of the polyvinylidene chloride or the copolymer of the methyl acrylate or the vinyl chloride, PE is polyethylene or modified polyethylene, and PP is polypropylene or modified polypropylene. The composite packaging material can solve the problem of effective composite of the PVDC-polyolefin material in the condition of the co-extruding, has high oxygen and water resistance, and can be used for various packages of gasing, vacuumizing and thermal forming.

Abstract: A thermal-formed high-blocked composite packaging material of co-extruded PVDC-polyolefin is made up of the up film as the exploded view and the down film as the forming -film. The up film is BOPP/PE-TIE-PVDC-TIE-PP-PE which is co-extruded by the multi-layer flow or inflation film and formed by the dry of the solvent-free; the down film is the PP-TIE-PVDC-TIE-PE which is co-extruded by the multi-layer flow or inflation film. PVDC is homopolymerization of the polyvinylidene chloride or the copolymer of the methyl acrylate or the vinyl chloride, the PE is the polyethylene or the modified polyethylene, the PP is the polypropylene or themodified polypropylene. It can solve the problem of effective composite of the PVDC-polyolefin material in the condition of the co-extruding. The product has the high oxygen and water resistance, can be used for various packages of gasing, vacuumizing and thermal forming.