CN111038047A - Sheet, preparation method and composite hose - Google Patents
Sheet, preparation method and composite hose Download PDFInfo
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- CN111038047A CN111038047A CN201911352698.2A CN201911352698A CN111038047A CN 111038047 A CN111038047 A CN 111038047A CN 201911352698 A CN201911352698 A CN 201911352698A CN 111038047 A CN111038047 A CN 111038047A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/40—Applications of laminates for particular packaging purposes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
- B32B2250/242—All polymers belonging to those covered by group B32B27/32
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/406—Bright, glossy, shiny surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/416—Reflective
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2553/00—Packaging equipment or accessories not otherwise provided for
Abstract
The embodiment of the application provides a sheet, a preparation method and a composite hose, and relates to the technical field of packaging materials. The sheet comprises an outer layer, a first adhesive film layer, a barrier layer, a second adhesive film layer and an inner layer which are sequentially stacked, wherein the outer layer is a polyethylene extinction film; the first adhesive film layer and the second adhesive film layer are low-density polyethylene films added with ethylene acrylic acid copolymer; the barrier layer is a polyethylene film added with ethylene-vinyl alcohol copolymer; the inner layer is a linear low density polyethylene film. The sheet material adopts the raw material for improving the hand feeling of the sheet material, so that the overall hand feeling of the sheet material is soft; in addition, the raw material components of each layer of the sheet have lower extrusion compounding temperature, and meanwhile, the welding seams among the layers of the sheet are kept to be firmly welded. Therefore, through the mode, the sheet can achieve the technical effect of soft hand feeling while reducing the production cost and improving the economic benefit.
Description
Technical Field
The application relates to the technical field of packaging materials, in particular to a sheet, a preparation method and a composite hose.
Background
At present, with the increasingly wide application of the composite hose, people have higher and higher expectations for the composite hose, and the requirement for excellent performance is more and more strict. People also put forward higher requirements on the performance of the composite hose, such as more beautiful printing effect, higher production efficiency, more reliable packaging quality and the like, and the performance standard of the old composite hose is gradually caught in the face of the demands of customers which are different day by day.
With the improvement of the requirements of the hose packaging industry, the original blown film PE cannot meet the requirements of customers in transparency, thickness uniformity and softness.
Disclosure of Invention
The embodiment of the application aims to provide a sheet, a preparation method and a composite hose, wherein the sheet can achieve the technical effect of soft hand feeling while reducing the production cost and improving the economic benefit.
In a first aspect, an embodiment of the present application provides a sheet, including an outer layer, a first adhesive film layer, a barrier layer, a second adhesive film layer, and an inner layer, which are sequentially stacked, where the outer layer is a polyethylene extinction film; the first adhesive film layer and the second adhesive film layer are low-density polyethylene films added with ethylene acrylic acid copolymer; the barrier layer is a polyethylene film added with ethylene-vinyl alcohol copolymer; the inner layer is a linear low density polyethylene film.
In the implementation process, the outer layer of the sheet is a polyethylene extinction film, wherein the polyethylene extinction film has the characteristics that the surface glossiness is low, the polyethylene extinction film has a good matt effect and comfortable visual sensation, and the surface has good surface glossiness due to the fact that the surface is smooth and flat and has good capacity of reflecting light; in addition, each layer of main material of the sheet adopts raw materials for improving the hand feeling of the sheet, so that the overall hand feeling of the sheet is softer. In addition, the sheet has a lower extrusion compounding temperature during the preparation process, and meanwhile, the welding seams between the layers of the sheet are kept firm. Therefore, through the mode, the sheet can reduce the production cost, improve the economic benefit and realize the technical effect of soft hand feeling.
Further, the materials of the outer layer, the first adhesive film layer, the barrier layer, the second adhesive film layer, and the inner layer comprise polypropylene or a blend of polypropylene and polyethylene.
In the implementation process, the raw materials of each layer of the sheet are polypropylene or a blend of polypropylene and polyethylene.
Further, the materials of the outer layer, the first adhesive film layer, the barrier layer, the second adhesive film layer and the inner layer comprise polyethylene raw materials with a melt index of 0.5-2.0.
In the implementation process, the sheet material made of 0.5-2.0 polyethylene raw material is adopted, so that the sheet material can be conveniently subjected to tube drawing forming, and a circular tube-shaped thin-wall product is formed and used for filling products such as cosmetics and toothpaste.
Furthermore, a plastic auxiliary agent is added into the polyethylene extinction film of the outer layer, so that the outer layer forms a uniform roughened surface.
In the implementation process, the polyethylene extinction film adopts polyethylene as a base material, and the extinction plastic auxiliary agent is added, so that a uniform roughened surface can be formed on the surface of the film, the dispersibility is good, and the generation of crystal points in the polyethylene extinction film is reduced, so that the polyethylene extinction film has good appearance.
Further, the thickness ratio of each layer of the sheet is as follows: the outer layer is 15-25%, the first adhesive film layer is 10-20%, the blocking layer is 10-30%, the second adhesive film layer is 10-20%, the inner layer is 15-35%, and the sum of the proportion of the layers is 100%.
In the above implementation, by setting the thickness ratio of each layer of the sheet material to the above range, on the one hand, the sheet material can be used as a packaging material without being affected; on the other hand, the production cost can be reduced, and the economic benefit can be improved.
Further, the thickness of the sheet is between 0.20mm and 0.35 mm.
In the above implementation, by setting the thickness of each layer of the sheet material to the above range, on the one hand, the sheet material can be used as a packaging material without being affected; on the other hand, the production cost can be reduced, and the economic benefit can be improved.
In a second aspect, embodiments of the present application provide a method for preparing a sheet material according to the first aspect, including:
mixing the raw material components of the outer layer, the first adhesive film layer, the barrier layer, the second adhesive film layer and the inner layer respectively;
respectively melting the raw material components of the outer layer, the first sticky film layer, the barrier layer, the second sticky film layer and the inner layer at 165-190 ℃ to respectively form sticky raw material components;
respectively conveying the viscose raw material components and converging the viscose raw material components to a film blowing die head, and extruding and compounding the outer layer, the first viscose layer, the barrier layer, the second viscose layer and the inner layer through the film blowing die head to form a tubular die blank;
and performing blowing, cooling and shaping, trimming and rolling operations on the tubular mold blank to obtain the sheet.
In the implementation process, after the raw materials of the outer layer, the first adhesive film layer, the barrier layer, the second adhesive film layer and the inner layer are respectively melted, five extruders respectively extrude the melted raw materials of the outer layer, the first adhesive film layer, the barrier layer, the second adhesive film layer and the inner layer; specifically, five extruders extrude and mold an outer layer, a first adhesive film layer, a barrier layer, a second adhesive film layer and an inner layer into a tubular film blank, convey and converge the tubular film blank to a film blowing die head, blow-expand a tubular film to a required thickness through high-pressure air in a better melt flowing state through the film blowing die head, and form the tubular film into a thin film after cooling and shaping; and finally, cutting edges of the cooled and shaped film and winding to obtain the sheet.
Further extrusion compounding the outer layer, the first tie-film layer, the barrier layer, the second tie-film layer, and the inner layer through the blown film die, comprising: extruding and compounding the inner layer and the barrier layer through the second adhesive film layer, wherein the parameters are as follows: the extrusion compounding temperature is 135-290 ℃, and the compounding pressure is 2.8-6.8 bar.
In the implementation process, the inner layer and the barrier layer are subjected to extrusion compounding operation through the second adhesive film layer.
Further, the extrusion compounding of the outer layer, the first adhesive film layer, the barrier layer, the second adhesive film layer and the inner layer through the film blowing die head further comprises: extruding and compounding the outer layer, the compounded inner layer and the barrier layer through the first adhesive film layer, wherein the parameters are as follows: the extrusion compounding temperature is 200-300 ℃, and the compounding pressure is 2.8-6.8 bar.
In the implementation process, the outer layer and the barrier layer are subjected to extrusion compounding operation through the first adhesive film layer; in addition, the operation of extruding and compounding the inner layer and the barrier layer is firstly carried out, and then the operation of extruding and compounding the outer layer and the compounded inner layer and barrier layer is carried out, so that the process flow of the sheet is optimized, the composite extrusion operation can be carried out between the inner layer and the barrier layer and between the outer layer and the barrier layer at different extrusion compounding temperatures, and the performance of the sheet is improved.
In a third aspect, embodiments of the present application provide a composite hose made from the sheet material of the first aspect.
In the implementation process, the sheet is made into a composite hose by winding, and the composite hose is used as a packaging material for daily chemical products such as cosmetics and toothpaste or videos; wherein the outer printing layer that is compound hose can be used to the printing identification information, and the inlayer is used for the content of direct contact product, and the contact of the content of barrier layer product and external environment can be obstructed.
Additional features and advantages of the disclosure will be set forth in the description which follows, or in part may be learned by the practice of the above-described techniques of the disclosure, or may be learned by practice of the disclosure.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
FIG. 1 is a schematic structural diagram of a sheet material provided in an embodiment of the present application;
FIG. 2 is a schematic flow chart of a sheet manufacturing method provided by an embodiment of the present application;
fig. 3 is a schematic flow chart of a sheet preparation method provided in an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or a point connection; either directly or indirectly through intervening media, or may be an internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "first," "second," and the like, are used primarily to distinguish one device, element, or component from another (the specific nature and configuration may be the same or different), and are not used to indicate or imply the relative importance or number of the indicated devices, elements, or components. "plurality" means two or more unless otherwise specified.
The sheet, the preparation method and the composite hose thereof provided by the embodiment of the application can be used as a packaging material for articles such as skin care products, cosmetics or toothpaste. The outer layer of the sheet is a polyethylene extinction film, wherein the polyethylene extinction film has the characteristics that the surface gloss is very low, the sheet has a good matte effect and comfortable visual sensation, and the surface has good surface gloss due to the fact that the surface is smooth and flat and has good capacity of reflecting light; in addition, each layer of main material of the sheet adopts raw materials for improving the hand feeling of the sheet, so that the overall hand feeling of the sheet is softer. In addition, the sheet has a lower extrusion compounding temperature during the preparation process, and meanwhile, the welding seams between the layers of the sheet are kept firm. Therefore, through the mode, the sheet can reduce the production cost, improve the economic benefit and realize the technical effect of soft hand feeling.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a sheet material provided in an embodiment of the present application, and the sheet material includes an outer layer 10, a first adhesive film layer 20, a barrier layer 30, a second adhesive film layer 40, and an inner layer 50.
Illustratively, the outer layer 10 is a Polyethylene (PE) matting film; the polyethylene extinction film has the characteristics that: the polyethylene is used as a matrix material, and the extinction plastic auxiliary agent is added, so that a uniform roughened surface can be formed on the surface of the diaphragm, the dispersibility is good, and the generation of crystal points in the polyethylene extinction film is reduced, so that the polyethylene extinction film has good appearance.
In some embodiments, the polyethylene matting film Low Density Polyethylene (LDPE) particles of the outer layer 10 are used as raw material, and the Low density polyethylene material has good flexibility and extensibility, so that the overall feel of the sheet material is soft and has a skin-like touch.
Illustratively, the first adhesive film layer 20 and the second adhesive film layer 40 are low density polyethylene films with an Ethylene Acrylic Acid (EAA) copolymer added thereto. The ethylene acrylic acid copolymer is a polymer with thermoplasticity and extremely high adhesiveness, and the excellent adhesion property can realize adhesion among the outer layer 10, the barrier layer 30 and the inner layer and keep the weld joint among the layers of the sheet material to be firmly welded.
Illustratively, the barrier layer 30 is a polyethylene film to which an Ethylene Vinyl alcohol copolymer (EVOH) is added. Wherein the ethylene-vinyl alcohol copolymer combines the processability of the ethylene polymer with the barrier effect of the vinyl alcohol polymer, and the ethylene-vinyl alcohol copolymer not only exhibits excellent processability, but also exhibits excellent barrier effect against gases, odors, perfumes, solvents, and the like. Since it has thermal stability by being combined with ethylene, the polyethylene film added with the ethylene-vinyl alcohol copolymer can be recycled, thereby increasing the applicable range of the barrier layer 30.
Illustratively, the inner layer 50 is a Linear Low Density Polyethylene (LLDPE) film. Wherein the linear low-density polyethylene is non-toxic, tasteless and odorless milky white particles, and the density is 0.918-0.935 g/cm 3. Compared with low density polyethylene, the linear low density polyethylene has higher softening temperature and melting temperature, has the advantages of high strength, good toughness, high rigidity, good heat resistance, good cold resistance and the like, also has good performances of environmental stress crack resistance, impact strength, tearing strength and the like, and can resist acid, alkali, organic solvents and the like. The linear low density polyethylene has better performance than common low density polyethylene and is very soft.
In some embodiments, the sheet material has a structure comprising, from top to bottom, an outer layer 10, a first adhesive film layer 20, a barrier layer 30, a second adhesive film layer 40, and an inner layer 50, wherein the first adhesive film layer 20 is configured to adhere to the outer layer 10 and the barrier layer 30, and the second adhesive film layer 40 is configured to adhere to the barrier layer 30 and the inner layer 50. By way of example, when the sheet is formed into a composite hose, the outer layer 10 may be used to print logo information, the inner layer 50 may be used to contact and contain the contents of a product, such as cosmetics, toothpaste, etc., and the barrier layer 30 may block gases, odors, flavors, solvents, etc., thereby extending the life of the product.
In some embodiments, the materials of the outer layer 10, first adhesive film layer 20, barrier layer 30, second adhesive film layer 40, and inner layer 50 include polypropylene or a blend of polypropylene and polyethylene.
In some embodiments, the materials of the outer layer 10, the first adhesive film layer 20, the barrier layer 30, the second adhesive film layer 40 and the inner layer 50 include a polyethylene raw material having a melt index of 0.5 to 2.0.
Illustratively, the sheet is a multi-layer structure made from a raw material containing polyethylene by an extrusion compounding process. The general polypropylene material has a melt index of more than 2.0, so that the manufactured sheet cannot be subjected to pipe drawing and forming; even if an injection molding process is adopted, a common polypropylene material is thin in thickness and low in toughness, and cannot form a circular tubular thin-walled product, so that the polypropylene material is used for filling products such as cosmetics and toothpaste. Therefore, the materials of the outer layer 10, the first adhesive film layer 20, the barrier layer 30, the second adhesive film layer 40 and the inner layer 50 of the sheet comprise polyethylene raw materials with the melt index of 0.5-2.0, and the manufactured sheet can be well subjected to tube drawing forming, so that a circular tube-shaped thin-walled product is formed and used for filling products such as cosmetics, toothpaste and the like.
In some embodiments, the ratio of the thicknesses of the layers of the sheet is: 15-25% of the outer layer 10, 10-20% of the first adhesive film layer 20, 10-30% of the barrier layer 30, 10-20% of the second adhesive film layer 40, 15-35% of the inner layer 50, and the sum of the proportions of the layers is 100%.
By way of example and not limitation, the ratio of the thicknesses of the layers of the sheet may be: 15% of the outer layer 10, 10% of the first adhesive film layer 20, 30% of the barrier layer 30, 10% of the second adhesive film layer 40 and 35% of the inner layer 50, wherein the sum of the proportions of the layers is 100%.
By setting the thickness ratio of each layer of the sheet to the above range, for example, on the one hand, the sheet can be made to be used as a packaging material without being affected; on the other hand, the production cost can be reduced, and the economic benefit can be improved.
In some embodiments, the sheet has a thickness of between 0.20mm and 0.35 mm.
Illustratively, the thickness of the sheet material can be 0.2mm, 0.25mm, 0.30mm, 0.35mm, etc., and sheets of different thicknesses can be produced according to different requirements.
By setting the thickness of each layer of the sheet to the above range, for example, on the one hand, the sheet can be made to be used as a packaging material without being affected; on the other hand, the production cost can be reduced, and the economic benefit can be improved.
Referring to fig. 2, fig. 2 is a schematic flowchart of a sheet manufacturing method according to an embodiment of the present disclosure. The preparation method comprises the following steps:
step S100: the raw material components of the outer layer, the first adhesive film layer, the barrier layer, the second adhesive film layer and the inner layer are respectively mixed.
Illustratively, the raw materials of the sheet are as described above, and the raw material components of the outer layer, the first adhesive film layer, the barrier layer, the second adhesive film layer and the inner layer are mixed in different containers, respectively, and stirred uniformly, so that the raw material components of the respective layers are mixed well.
Step S200: and respectively melting the raw material components of the outer layer, the first adhesive film layer, the barrier layer, the second adhesive film layer and the inner layer at 165-190 ℃ to respectively form sticky raw material components.
Illustratively, after the raw materials of the outer layer, the first adhesive film layer, the barrier layer, the second adhesive film layer and the inner layer are respectively mixed, the mixture is respectively fed into five extruders of a film blowing machine and is melted at 165-190 ℃.
Step S300: respectively conveying and converging the viscose raw material components to a film blowing die head, and extruding and compounding the outer layer, the first viscose layer, the barrier layer, the second viscose layer and the inner layer through the film blowing die head to form a tubular die blank;
step S400: and (5) performing blowing, cooling and shaping, trimming and rolling on the tubular mold blank to obtain the sheet.
Illustratively, after the raw materials of the outer layer, the first adhesive film layer, the barrier layer, the second adhesive film layer and the inner layer are respectively melted, five extruders respectively extrude the melted raw materials of the outer layer, the first adhesive film layer, the barrier layer, the second adhesive film layer and the inner layer; specifically, five extruders extrude and mold an outer layer, a first adhesive film layer, a barrier layer, a second adhesive film layer and an inner layer into a tubular film blank, convey and converge the tubular film blank to a film blowing die head, blow-expand a tubular film to a required thickness through high-pressure air in a better melt flowing state through the film blowing die head, and form the tubular film into a thin film after cooling and shaping; and finally, cutting edges of the cooled and shaped film and winding to obtain the sheet.
Illustratively, the working temperature of the film blowing die during film blowing is 200 ℃, and the winding tension of the outer layer, the first sticky film layer, the barrier layer, the second sticky film layer and the inner layer during conveying and converging to the film blowing die is 7kgf, so that the outer layer, the first sticky film layer, the barrier layer, the second sticky film layer and the inner layer are better subjected to extrusion compounding operation.
In some embodiments, in step S300, the outer layer, the first adhesive film layer, the barrier layer, the second adhesive film layer and the inner layer are extrusion-compounded through a film blowing die head, or after the extrusion-compounding operation is performed between the inner layer and the barrier layer, the extrusion-compounding operation is performed between the outer layer and the compounded inner layer and barrier layer; it should be noted that the inner layer and the barrier layer are compounded through the second adhesive film layer, and the outer layer and the barrier layer are compounded through the first adhesive film layer.
Referring to fig. 3, fig. 3 is a schematic flowchart of a sheet manufacturing method according to an embodiment of the present application, where the sheet manufacturing method includes:
step S310: the inner layer and the barrier layer are extruded and compounded, and the parameters are as follows: the extrusion compounding temperature is 135-290 ℃, the compounding pressure is 2.8-6.8 bar, the unreeling tension is 18-23 kgf, and the reeling tension is 28-37 kgf.
Step S320: the outer layer is extruded and compounded with the compounded inner layer and the barrier layer, and the parameters are as follows: the extrusion compounding temperature is 200-300 ℃, and the compounding pressure is as follows: 2.8 ~ 6.8bar, unreel tension: 18-23 kgf, winding tension: 28 to 37 kgf.
Illustratively, through the above mode, the operation of extruding and compounding the inner layer and the barrier layer is firstly performed, and then the operation of extruding and compounding the outer layer and the compounded inner layer and barrier layer is performed, so that the process flow of the sheet is optimized, the extrusion and compounding operations can be performed between the inner layer and the barrier layer and between the outer layer and the barrier layer at different extrusion and compounding temperatures, and the performance of the sheet is improved.
The embodiment of the application also provides a composite hose which is made of the sheet materials shown in the figures 1 to 3 and can be used as a packaging material for daily chemical products such as cosmetics and toothpaste or food such as dairy products.
In some implementation scenes, the sheet comprises an outer layer, a first adhesive film layer, a blocking layer, a second adhesive film layer and an inner layer from top to bottom in sequence, wherein the outer layer of the sheet is a polyethylene extinction film, and the polyethylene extinction film has the characteristics that the surface gloss is very low, the polyethylene extinction film has a good matt effect and comfortable visual sensation, and the surface has good surface gloss due to the fact that the surface is smooth and flat and has good capacity of reflecting light; and, the material of each layer of the sheet: the polyethylene matting film, the low-density polyethylene film added with the ethylene acrylic acid copolymer, the polyethylene film added with the ethylene-vinyl alcohol copolymer and the linear low-density polyethylene film are soft raw materials, so that the overall hand feeling of the sheet material is softer. In addition, the sheet has lower extrusion compounding temperature in the preparation process, and can keep the weld joint between each layer of the sheet firm. Therefore, through the mode, the sheet can reduce the production cost, improve the economic benefit and realize the technical effect of soft hand feeling.
In all embodiments of the present application, the terms "large" and "small" are relatively speaking, and the terms "upper" and "lower" are relatively speaking, so that descriptions of these relative terms are not repeated herein.
It should be appreciated that reference throughout this specification to "in this embodiment," "in an embodiment of the present application," or "as an alternative implementation" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in this embodiment," "in the examples of the present application," or "as an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Those skilled in the art should also appreciate that the embodiments described in this specification are all alternative embodiments and that the acts and modules involved are not necessarily required for this application.
In various embodiments of the present application, it should be understood that the size of the serial number of each process described above does not mean that the execution sequence is necessarily sequential, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A sheet material is characterized by comprising an outer layer, a first adhesive film layer, a barrier layer, a second adhesive film layer and an inner layer which are sequentially laminated,
the outer layer is a polyethylene extinction film;
the first adhesive film layer and the second adhesive film layer are low-density polyethylene films added with ethylene acrylic acid copolymer;
the barrier layer is a polyethylene film added with ethylene-vinyl alcohol copolymer;
the inner layer is a linear low density polyethylene film.
2. The sheet material of claim 1, wherein the material of the outer layer, the first adhesive film layer, the barrier layer, the second adhesive film layer, and the inner layer comprises polypropylene or a blend of polypropylene and polyethylene.
3. The sheet of claim 1, wherein the materials of the outer layer, the first adhesive film layer, the barrier layer, the second adhesive film layer and the inner layer comprise a polyethylene feedstock having a melt index of 0.5 to 2.0.
4. The sheet material of claim 2, wherein the polyethylene matte film of the outer layer is added with a plastic additive to form a uniform roughened surface on the outer layer.
5. The sheet according to claim 1, wherein the thickness ratio of each layer of the sheet is: the outer layer is 15-25%, the first adhesive film layer is 10-20%, the blocking layer is 10-30%, the second adhesive film layer is 10-20%, the inner layer is 15-35%, and the sum of the proportion of the layers is 100%.
6. The sheet according to claim 1, wherein the thickness of the sheet is between 0.20mm and 0.35 mm.
7. A method for preparing a sheet material according to any one of claims 1 to 6, comprising:
mixing the raw material components of the outer layer, the first adhesive film layer, the barrier layer, the second adhesive film layer and the inner layer respectively;
respectively melting the raw material components of the outer layer, the first sticky film layer, the barrier layer, the second sticky film layer and the inner layer at 165-190 ℃ to respectively form sticky raw material components;
respectively conveying the viscose raw material components and converging the viscose raw material components to a film blowing die head, and extruding and compounding the outer layer, the first viscose layer, the barrier layer, the second viscose layer and the inner layer through the film blowing die head to form a tubular die blank;
and performing blowing, cooling and shaping, trimming and rolling operations on the tubular mold blank to obtain the sheet.
8. The method of making a sheet according to claim 7, wherein said extrusion compounding said outer layer, said first tie-film layer, said barrier layer, said second tie-film layer and said inner layer through said blown film die comprises:
extruding and compounding the inner layer and the barrier layer through the second adhesive film layer, wherein the parameters are as follows: the extrusion compounding temperature is 135-290 ℃, and the compounding pressure is 2.8-6.8 bar.
9. The method of making a sheet according to claim 8, wherein said extrusion compounding said outer layer, said first tie-film layer, said barrier layer, said second tie-film layer and said inner layer through said blown film die further comprises:
extruding and compounding the outer layer, the compounded inner layer and the barrier layer through the first adhesive film layer, wherein the parameters are as follows: the extrusion compounding temperature is 200-300 ℃, and the compounding pressure is 2.8-6.8 bar.
10. A composite hose, characterized in that it is made of a sheet according to any one of claims 1 to 6.
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| CN201911352698.2A CN111038047A (en) | 2019-12-23 | 2019-12-23 | Sheet, preparation method and composite hose |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911352698.2A CN111038047A (en) | 2019-12-23 | 2019-12-23 | Sheet, preparation method and composite hose |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111730942A (en) * | 2020-06-30 | 2020-10-02 | 广州市瑞高包装工业有限公司 | Antibacterial and mildewproof composite sheet and composite hose |
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