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In the processing of film will be a raw material extruded to have been made on another kind of film or will have been made on the different kinds of film, the use of adhesives to bond each other into a multilayer film, this product is called composite film. Co-extruded film has most of the characteristics of the composite film, but there is a difference, that is, co-extruded film of all the layers are extruded at the same time, layer to layer is by hot melt bonding without the need for adhesives.
Most of the materials used for laminating films are plastics, but paper, metal foil (usually aluminum) or fabric can also be used. All layers of co-extruded film are extruded together at the same time, so there will be no aluminum foil, paper and other non-plastic materials.
Composite film can be delaminated under certain conditions, co-extruded film will not, so there will be a different form of expression between the two under the action of tensile tension; in addition, because of the co-extruded film materials are combined together by heat fusion, so when pinched with force, it will produce similar to the spherical bubbles, and composite film, because it is combined by the bonding agent, so when pinched with force, so it does not produce spherical air bubbles.
Multi-layer co-extruded barrier film refers to the use of multiple extruders, respectively, with high barrier properties of the resin and the melt of other resins, extruded through a common die and a functional composite film . Multi-layer co-extrusion composite is a green composite production process, especially for the current food packaging industry, the raw materials used are generally certified by the U.S. Food and Health and Safety Agency materials, raw materials from the specialized feeding pipeline centralized to each layer of the unified feed, the processing of raw materials without exposure, no environmental pollution and other phenomena. The conclusion of the layer is modified LLDPE as raw materials, the environment, food and human non-toxic, not to mention the traditional dry composite, that is, the so-called solvent residue phenomenon, no exhaust pollution; also different from the dry composite, solvent-free composite and general single-layer extrusion composite process, the need for drying boxes to deal with, therefore, energy consumption is also less. In addition, multi-layer co-extrusion composite process also has the following advantages. Nanjing Suminoe Precision specializes in co-extruded film and composite film production line
(1) Low cost
The multi-layer co-extrusion composite process uses a variety of resins with different functions, and only one blow molding process can be used to make multi-functional composite film products, which reduces production costs. Moreover, under the condition of meeting customers' requirements, the resin material with required performance can be reduced to the minimum thickness, and the thinnest single layer can be up to 2~3¦Ìm, which can greatly reduce the use of expensive resin, thus lowering the material cost.
(2) Flexible structure
Multi-layer co-extrusion technology can be a variety of raw materials for different combinations of collocation, the full use of different properties of raw materials, one-time molding, not subject to market restrictions on the specifications of the relevant products, can effectively meet the needs of different packaging occasions, the more layers, the more flexible the structural design, the lower the cost.
(3) High composite performance
Co-extrusion composite process will be molten adhesive and base resin composite together, this process composite peel strength is very high, usually up to 3N/15mm or more, or even can not be peeled off, adapted to general packaging materials. For products with high peel strength requirements, hot adhesive resin can be added into the composite, peel strength up to 14N/15mm, or even higher.
(4) Wide range of applications, wide use of the environment
Multi-layer co-extruded composite products can cover almost all the packaging field: food, daily chemical products, beverages, pharmaceuticals, protective film and even aerospace products, etc. At present, many domestic dry composite products in foreign countries have been used co-extruded composite process. Toothpaste tubes which cannot be produced by dry composite process. Paper-plastic-aluminum composite products. Aerospace and other products are also co-extruded composite process to achieve. With the co-extruded composite resin, process and equipment aspects of in-depth research and continuous innovation, multi-layer co-extruded composite will expand to a wider range.
First of all, multi-layer co-extruded barrier film is a plastic film. In the field of plastic products, we usually thickness of 0.2 mm below the plane of plastic products called plastic film, the thickness of 0.2 ~ 0.7 mm between called plastic sheet, and the thickness of more than 0.7 mm called sheet.
Translated with DeepL.com (free version)
Most of the materials used for laminating films are plastics, but paper, metal foil (usually aluminum) or fabric can also be used. All layers of co-extruded film are extruded together at the same time, so there will be no aluminum foil, paper and other non-plastic materials.
Composite film can be delaminated under certain conditions, co-extruded film will not, so there will be a different form of expression between the two under the action of tensile tension; in addition, because of the co-extruded film materials are combined together by heat fusion, so when pinched with force, it will produce similar to the spherical bubbles, and composite film, because it is combined by the bonding agent, so when pinched with force, so it does not produce spherical air bubbles.
Multi-layer co-extruded barrier film refers to the use of multiple extruders, respectively, with high barrier properties of the resin and the melt of other resins, extruded through a common die and a functional composite film . Multi-layer co-extrusion composite is a green composite production process, especially for the current food packaging industry, the raw materials used are generally certified by the U.S. Food and Health and Safety Agency materials, raw materials from the specialized feeding pipeline centralized to each layer of the unified feed, the processing of raw materials without exposure, no environmental pollution and other phenomena. The conclusion of the layer is modified LLDPE as raw materials, the environment, food and human non-toxic, not to mention the traditional dry composite, that is, the so-called solvent residue phenomenon, no exhaust pollution; also different from the dry composite, solvent-free composite and general single-layer extrusion composite process, the need for drying boxes to deal with, therefore, energy consumption is also less. In addition, multi-layer co-extrusion composite process also has the following advantages. Nanjing Suminoe Precision specializes in co-extruded film and composite film production line
(1) Low cost
The multi-layer co-extrusion composite process uses a variety of resins with different functions, and only one blow molding process can be used to make multi-functional composite film products, which reduces production costs. Moreover, under the condition of meeting customers' requirements, the resin material with required performance can be reduced to the minimum thickness, and the thinnest single layer can be up to 2~3¦Ìm, which can greatly reduce the use of expensive resin, thus lowering the material cost.
(2) Flexible structure
Multi-layer co-extrusion technology can be a variety of raw materials for different combinations of collocation, the full use of different properties of raw materials, one-time molding, not subject to market restrictions on the specifications of the relevant products, can effectively meet the needs of different packaging occasions, the more layers, the more flexible the structural design, the lower the cost.
(3) High composite performance
Co-extrusion composite process will be molten adhesive and base resin composite together, this process composite peel strength is very high, usually up to 3N/15mm or more, or even can not be peeled off, adapted to general packaging materials. For products with high peel strength requirements, hot adhesive resin can be added into the composite, peel strength up to 14N/15mm, or even higher.
(4) Wide range of applications, wide use of the environment
Multi-layer co-extruded composite products can cover almost all the packaging field: food, daily chemical products, beverages, pharmaceuticals, protective film and even aerospace products, etc. At present, many domestic dry composite products in foreign countries have been used co-extruded composite process. Toothpaste tubes which cannot be produced by dry composite process. Paper-plastic-aluminum composite products. Aerospace and other products are also co-extruded composite process to achieve. With the co-extruded composite resin, process and equipment aspects of in-depth research and continuous innovation, multi-layer co-extruded composite will expand to a wider range.
First of all, multi-layer co-extruded barrier film is a plastic film. In the field of plastic products, we usually thickness of 0.2 mm below the plane of plastic products called plastic film, the thickness of 0.2 ~ 0.7 mm between called plastic sheet, and the thickness of more than 0.7 mm called sheet.
Translated with DeepL.com (free version)