CN216183491U - Novel composite plastic uptake or blow molding sheet structure - Google Patents
Novel composite plastic uptake or blow molding sheet structure Download PDFInfo
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- CN216183491U CN216183491U CN202123047153.6U CN202123047153U CN216183491U CN 216183491 U CN216183491 U CN 216183491U CN 202123047153 U CN202123047153 U CN 202123047153U CN 216183491 U CN216183491 U CN 216183491U
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Abstract
The utility model relates to the technical field of packaging sheets, and discloses a novel composite plastic uptake or blow molding sheet structure, which solves the technical problems that multiple molds, synchronization, high stability processing performance, multicolor high printing performance, inner layer heat sealing performance and material barrier performance which are required in the current packaging field are required and taken into consideration, and a proper composite layer number and a combination of different composite materials are not found, and comprises a surface layer, a first bonding layer, a middle layer, a second bonding layer and an inner layer, wherein the surface layer is configured into any one of a polyethylene terephthalate (PET) layer, a polypropylene (PP) layer and a modified polyethylene (MODPE) layer; the middle layer is configured to be any one of a Polystyrene (PS) layer, a polyvinyl chloride (PVC) layer, a Polyethylene (PE) layer, a polypropylene (PP) layer and modified polyethylene terephthalate (MODPET); the inner layer is configured to be any one of a Polyethylene (PE) layer, a polypropylene (PP) layer and modified polyethylene terephthalate (MODPET).
Description
Technical Field
The utility model relates to the technical field of packaging sheets, in particular to a novel composite plastic uptake or blow molding sheet structure.
Background
Technical background: the plastic suction molding or blow molding principle is that the material is combined with the mold, and the design and production of products with different shapes are realized through specific processing parameters according to the mechanical and thermal properties of the material. At present, products processed by plastic suction or blow molding on the market mainly comprise plastic trays, display stands, shells of various parts or equipment shells for industrial production, and living ends such as plastic basins, plastic lunch boxes, children toys and the like. The product is mainly used for non-core parts or middle and low-end living goods in industrial production, has lower requirements on product shape precision and product appearance (such as multi-pattern and multi-color appearance), generally adopts single-mode or double-mode molding due to larger limitation of product size, and has low production efficiency.
With the gradual popularization of the plastic suction/blow molding processing technology, the plastic suction/blow molding processing technology can form a hollow unique effect by combining with the molding technology, and the plastic suction/blow molding technology is gradually applied to the packaging of paste or liquid in the consumption fields of food, cosmetics, medicine and the like. Compared with the traditional molding requirements of various plastic shells or middle and low end plastic products, the packaging of products in the field of consumer packaging, particularly food and cosmetics, has more various requirements on the appearance, shape, color, material barrier property and heat sealing property of the plastic uptake/blow molding material, and meanwhile, because of the characteristics of the products in the field of consumer packaging, small packaging is generally adopted, how to realize the synchronous, high-speed and stable production of multiple molds is realized, and higher requirements are also provided for various properties of the material as well as the production equipment.
Analysis of the prior art: the Polyamide (PA) film with good heat resistance and printing performance is used as a surface layer, the Polyethylene (PE) with good blow molding/plastic uptake processing performance and heat sealing performance is used as an inner layer, and aluminized or aluminum foil is used as a barrier layer for composite molding. The sheet material has good printing performance and barrier performance, but the Polyamide (PA) is easy to shrink under heating, and the aluminum foil layer has poor extensibility, so that the sheet material has poor processing performance.
The technical problem is as follows: by adopting a multilayer coextrusion or multilayer casting sheet forming process, although the combination of heat resistance, ductility and heat sealing performance required by the sheet can be realized through different functional layer materials, the processing mode is too single, so that the selection of different layer materials is more limited, for example, multilayer coextrusion polypropylene or polyethylene, random copolymerization polypropylene or homopolymer polypropylene is generally selected as an inner layer material and an outer layer material to realize the heat sealing performance and the heat resistance of the multilayer coextrusion polypropylene. Similarly, the multilayer co-extruded polyethylene can only realize the good comprehensive performance of the multilayer co-extruded polyethylene material through linear polyethylene, low-density polyethylene or high-density polyethylene.
The existing composite process, double-layer or multi-layer composite process, can realize the integration of different material properties, but has no proper composite layer number and combination of different composite materials for the requirements of multi-mould, synchronization, high stability processing performance, high printing performance of multicolor, inner layer heat sealing performance and material barrier performance required by food, cosmetics, medicine paste and liquid packaging.
The multi-mold plastic-blow molding packaging material aims to solve the problem that the existing plastic-blow molding packaging material for foods, cosmetics and medical paste or liquid requires multiple molds, synchronization, high stability and processability, and multiple performances of high printing performance of multiple colors, inner layer heat sealing performance and material barrier performance. The method solves the problem of material limitation caused by a single processing technology in the existing multilayer co-extrusion or multilayer casting technology, and the uncertainty of the existing composite technology in the layer number and material combination of paste or liquid packaging composite materials in the fields of food, cosmetics and medicine.
SUMMERY OF THE UTILITY MODEL
Aiming at the technical problems that multiple requirements of multiple dies, synchronization, high stability and processability, high printing performance of multiple colors, inner layer heat sealing performance and material barrier performance required in the packaging field are considered, and proper composite layer numbers and combinations of different composite materials are not found, the utility model utilizes the combination of multiple material layer structures to achieve the aim of meeting the multiple requirements and considering the sheet material structure.
In order to achieve the purpose, the utility model provides the following technical scheme:
a novel composite plastic uptake or blow molding sheet structure comprises a surface layer, a first adhesive layer, a middle layer, a second adhesive layer and an inner layer, wherein the surface layer is configured to be any one of a polyethylene terephthalate (PET) layer, a polypropylene (PP) layer and a modified polyethylene (MODPE) layer; the middle layer is configured to be any one of a Polystyrene (PS) layer, a polyvinyl chloride (PVC) layer, a Polyethylene (PE) layer, a polypropylene (PP) layer and modified polyethylene terephthalate (MODPET); the inner layer is configured to be any one of a Polyethylene (PE) layer, a polypropylene (PP) layer and modified polyethylene terephthalate (MODPET).
According to the technical scheme, the surface layer is the PET film, the PP layer or the modified polyethylene MODPE layer which is used as the printing layer, and the PET film, the PP layer or the modified polyethylene MODPE layer has good printing performance and heat resistance, and has higher rigidity so as to realize pattern stability and forming stability in the printing process and the processing and forming process; preferably, the PET, PP or modified polyethylene MODPE layer of the surface layer can improve the crystallinity of the surface layer material through stretching treatment so as to realize better heat resistance and processing stability.
The middle layer is a PS, PVC, PP, PE or PET co-extrusion or casting sheet material, is used as a middle supporting layer of a three-layer material, and has good mechanical property and processability.
The inner layer is a heat sealing layer and a blocking layer, and a PE, PP or MODPET film is selected to realize good heat sealing performance and blocking performance required by the packaging material; more preferably, the barrier layer is Vinyl Alcohol (VA), ethylene-vinyl alcohol copolymer (EVOH) or a coating with barrier property, wherein the inner layer of the barrier layer accounts for 1-40%.
The utility model is further configured to: the first bonding layer and the second bonding layer have the same structure and are configured into a polyurethane, acrylic acid or polyether system, and the thickness of the first bonding layer and the second bonding layer is 0.001mm-0.01 mm.
According to the technical scheme, the bonding layer can be formed by a dry method, a wet method or a solvent-free composite process to realize bonding among the structures, the thickness of the bonding layer is 0.001-0.01 mm, and the bonding layer is made of a polyurethane or acrylic acid system.
The utility model is further configured to: the thickness of the surface layer is 0.01mm-0.1 mm; the thickness of the middle layer is 0.1mm-0.5 mm; the thickness of the inner layer is 0.03mm-0.15 mm.
Through the technical scheme, the surface printing layer is a PET (polyethylene terephthalate) film, a PP (polypropylene) film or an MODPE (modified polyethylene) film, the PET film, the PP film or the MODPE film has good printing performance and heat resistance, and has higher rigidity, so that the pattern stability and the forming stability of a printing process and a processing and forming process are realized, and the thickness is 0.01-0.1 mm. The middle layer is a PS, PVC, PP, PE or MODPET co-extrusion or casting sheet with the thickness of 0.1-1.2 mm, and is used as a middle supporting layer of three-layer materials, and four types of sheets in the thickness range have good mechanical property and processing property.
The utility model is further configured to: the inner layer is configured as a barrier heat seal layer of Vinyl Alcohol (VA), ethylene vinyl alcohol copolymer (EVOH) or a barrier coating with barrier property and polyethylene PE, polypropylene PP or modified polyethylene terephthalate MODPET.
Through the technical scheme, the inner layer is the heat sealing layer and the blocking layer, the PE, PP or modified MODPET film processed by multilayer co-extrusion or coating is selected, the thickness is 0.03mm-0.15mm, and the good heat sealing performance and the blocking performance required by the packaging material are realized.
The utility model is further configured to: the inner layer is configured as a co-extruded film layer of Vinyl Alcohol (VA) or ethylene vinyl alcohol copolymer (EVOH) with polyethylene PE having barrier properties.
Through the technical scheme, the inner layer is the heat sealing layer and the blocking layer, the multilayer co-extrusion PE or the multilayer co-extrusion PP film is selected, the thickness is 0.03mm-0.15mm, and the good heat sealing performance and the blocking performance required by the packing material are realized.
The utility model provides the following technical scheme II:
a processing method of a novel composite plastic uptake or blow molding sheet structure comprises the following steps:
STEP 1: selecting materials;
selecting any one of a polyethylene terephthalate (PET) layer, a polypropylene (PP) layer or a modified polyethylene (MODPE) layer as the surface layer (1); selecting the middle layer (3) as any one of a Polystyrene (PS) layer, a polyvinyl chloride (PVC) layer, a Polyethylene (PE) layer, a polypropylene (PP) layer and a modified polyethylene terephthalate (MODPET) layer; selecting any one of a Polyethylene (PE) layer, a polypropylene (PP) layer or a modified polyethylene terephthalate (MODPET) layer as the inner layer (5);
STEP2 composite process;
→ top layer printing; printing the corresponding layout on the surface layer by using a flexo printing or gravure printing process in a surface printing or inner printing mode;
→ complexation; the three-layer compounding of the printed back layer material, the middle layer and the inner layer is completed through two-in-one or three-in-one compounding equipment, and the compounding process adopts wet compounding, dry compounding or solvent-free compounding;
→ ripening; placing the compounded semi-finished product coiled film into a curing chamber with set temperature and humidity for curing for not less than 12 hours to realize reaction and curing bonding of the compound glue;
→ cutting and packaging; and cutting the edges of the cured semi-finished product, cutting the finished product with multiple spliced layouts, and packaging and delivering the finished product.
Through the technical scheme, a multilayer coextrusion or multilayer casting sheet forming process is adopted, although the combination of heat resistance, ductility and heat sealing performance required by the sheet can be realized through different functional layer materials, the processing mode has large limitation on material selection, so that the limitation on the selection of different layer materials is large. For example, the multi-layer co-extruded polypropylene or polyethylene generally adopts polypropylene random copolymer or polypropylene homopolymer as the inner and outer layer materials to realize the heat sealing property and heat resistance of the multi-layer co-extruded polypropylene. Similarly, the multilayer co-extruded polyethylene can only realize the good comprehensive performance of the multilayer co-extruded polyethylene material through linear polyethylene, low-density polyethylene or high-density polyethylene. In other words, some materials have melting points that are too high to be suitable for coextrusion and casting processes.
In conclusion, the utility model has the following beneficial effects:
(1) the surface layer is a PET film, a PP film or an MODPE film as a printing layer, and the three have good printing performance and heat resistance, and have higher rigidity so as to realize pattern stability and forming stability in the printing process and the processing and forming process; preferably, the PET, PP or MODPE of the surface layer can improve the crystallinity of the surface layer material through stretching treatment so as to realize better heat resistance and processing stability.
(2) The middle layer is a PS, PVC, PP, PE or MODPET co-extrusion or casting sheet material, is used as a middle supporting layer of a three-layer material, and has good mechanical property and processability.
(3) The inner layer is a heat sealing layer and a blocking layer, and a PE, PP or MODPET film is treated by a multilayer co-extrusion or blocking coating, so that the good heat sealing performance and blocking performance required by the packing material are realized; preferably, the barrier layer is a Vinyl Alcohol (VA), ethylene-vinyl alcohol copolymer (EVOH) coextrusion or polyvinylidene chloride PVDC coating, wherein the inner layer of the barrier layer accounts for 1-40%.
Drawings
FIG. 1 is a schematic view of a sheet layer structure.
Reference numerals: 1. a surface layer; 2. a first adhesive layer; 3. an intermediate layer; 4. a second adhesive layer; 5. an inner layer.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited to these examples.
Example 1
A novel composite plastic uptake or blow molding sheet structure is shown in figure 1 and comprises a surface layer 1, a first adhesive layer 2, a middle layer 3, a second adhesive layer 4 and an inner layer 5. The composite sheet is respectively configured into a PET (polyethylene terephthalate)/adhesive layer (Tie)/0.25mm PS (polystyrene)/adhesive layer (Tie)/0.05mm PE (polyethylene) with the thickness of 0.012mm, wherein the single-layer thickness of the adhesive layer (Tie) is 0.004mm, the total thickness of the composite sheet is about 0.32mm, the PET is PET subjected to biaxial stretching treatment, the inner layer is Mul-PE & EVOH (multi-layer co-extrusion film of ethylene-vinyl alcohol copolymer), a polyurethane adhesive is adopted, the finished composite sheet has good printing performance, inner layer heat sealing performance and material barrier performance, and the synchronous high-stability processing of 4 dies and more than multiple groups of dies within the size of 100mm x 200mm is met.
Example 2
A novel composite plastic uptake or blow molding sheet structure is shown in figure 1 and comprises a surface layer 1, a first adhesive layer 2, a middle layer 3, a second adhesive layer 4 and an inner layer 5. The composite sheet is respectively configured into a PET (polyethylene terephthalate)/adhesive layer (Tie)/PVC (polyvinyl chloride)/adhesive layer (PE) with the thickness of 0.012 mm/0.19 mm, wherein the single-layer thickness of the adhesive layer (Tie) is 0.004mm, the total thickness of the composite sheet is about 0.29mm, the PET is PET subjected to biaxial stretching treatment, the inner layer is Mul-PE & EVOH (multi-layer co-extrusion film of ethylene-vinyl alcohol copolymer), a polyurethane system adhesive is adopted, the printing performance, the inner layer heat sealing performance and the material barrier performance of the finished composite sheet are good, and the synchronous high-stability processing of 4 dies and more than multiple groups of dies within the size of 100mm x 200mm is simultaneously met.
Example 3
A novel composite plastic uptake or blow molding sheet structure is shown in figure 1 and comprises a surface layer 1, a first adhesive layer 2, a middle layer 3, a second adhesive layer 4 and an inner layer 5. The composite sheet is respectively configured into a PET (polyethylene terephthalate)/adhesive layer (Tie)/0.3mm PE (polyethylene)/adhesive layer (Tie)/0.05mm PE (polyethylene) with the thickness of 0.012mm, wherein the single-layer thickness of the adhesive layer (Tie) is 0.004mm, the total thickness of the composite sheet is about 0.37mm, the PET is PET subjected to biaxial stretching treatment, the inner layer is Mul-PE & EVOH (multi-layer co-extrusion film of ethylene-vinyl alcohol copolymer), a polyurethane adhesive is adopted, the printing performance, the inner layer heat sealing performance and the material barrier performance of the finished composite sheet are good, and the synchronous high-stability processing of 4 dies and more than multiple groups of dies within the size of 100mm x 200mm is simultaneously met.
Example 4
A novel composite plastic uptake or blow molding sheet structure is shown in figure 1 and comprises a surface layer 1, a first adhesive layer 2, a middle layer 3, a second adhesive layer 4 and an inner layer 5. The composite sheet is respectively configured into a PET (polyethylene terephthalate)/adhesive layer (Tie)/PP (polypropylene) with the thickness of 0.012mm, wherein the single-layer thickness of the adhesive layer (Tie) is 0.004mm, the total thickness of the composite sheet is about 0.37mm, the PET is subjected to biaxial stretching treatment, the inner layer is a Mul-PP & EVOH (multi-layer co-extrusion film of propylene and ethylene-vinyl alcohol copolymer), and a polyurethane system adhesive is adopted, so that the finished composite sheet has good printing performance, inner layer heat sealing performance and material barrier performance, and simultaneously meets the synchronous high-stability processing of 4 dies with the size of 100mm x 200mm and more than multiple groups of dies.
Example 5
A novel composite plastic uptake or blow molding sheet structure is shown in figure 1 and comprises a surface layer 1, a first adhesive layer 2, a middle layer 3, a second adhesive layer 4 and an inner layer 5. The composite sheet is respectively prepared into CPP (casting polypropylene)/adhesive layer (Tie)/0.2mm PVC (polyvinyl chloride)/adhesive layer (Tie)/0.08mm PE (polyethylene) with the thickness of 0.04mm, wherein the single-layer thickness of the adhesive layer (Tie) is 0.004mm, the total thickness of the composite sheet is about 0.328mm, the CPP is subjected to unidirectional stretching treatment, the inner layer is a multi-layer co-extrusion film of Mul-PE & EVOH (ethylene-vinyl alcohol copolymer), and a polyurethane system adhesive is adopted, so that the finished composite sheet has good printing performance, inner layer heat sealing performance and material barrier performance, and simultaneously meets the synchronous high-stability processing of 4 dies with the size of 100mm x 200mm and more than multiple groups of dies.
Example 6
A novel composite plastic uptake or blow molding sheet structure is shown in figure 1 and comprises a surface layer 1, a first adhesive layer 2, a middle layer 3, a second adhesive layer 4 and an inner layer 5. The composite sheet is respectively prepared into CPP (cast polypropylene)/adhesive layer (Tie)/0.25mm PS (polystyrene)/adhesive layer (Tie)/0.05mm PE (polyethylene) with the thickness of 0.04mm, wherein the single-layer thickness of the adhesive layer (Tie) is 0.004mm, the total thickness of the composite sheet is about 0.348mm, the CPP is subjected to unidirectional stretching treatment, the inner layer is a Mul-PE & EVOH (multi-layer co-extrusion film of ethylene and ethylene-vinyl alcohol copolymer), and a polyurethane system adhesive is adopted, so that the finished composite sheet has good printing performance, inner layer heat sealing performance and material barrier performance, and simultaneously meets the synchronous high-stability processing of 4 dies with the size of 100mm x 200mm and more than multiple groups of dies.
Example 7
A novel composite plastic uptake or blow molding sheet structure is shown in figure 1 and comprises a surface layer 1, a first adhesive layer 2, a middle layer 3, a second adhesive layer 4 and an inner layer 5. The composite sheet is respectively prepared into CPP (casting polypropylene)/adhesive layer (Tie)/0.25mm PP (polypropylene)/adhesive layer (Tie)/0.05mm PE (polyethylene) with the thickness of 0.04mm, wherein the single-layer thickness of the adhesive layer (Tie) is 0.004mm, the total thickness of the composite sheet is about 0.348mm, the CPP is subjected to unidirectional stretching treatment, the inner layer is a Mul-PE & EVOH (multi-layer co-extrusion film of ethylene and ethylene-vinyl alcohol copolymer), a polyurethane system adhesive is adopted, the finished composite sheet has good printing performance, inner layer heat sealing performance and material barrier performance, and the synchronous high-stability processing of 4 dies with the size of 100mm x 200mm and more than multiple groups of dies is simultaneously met.
Example 8
A novel composite plastic uptake or blow molding sheet structure is shown in figure 1 and comprises a surface layer 1, a first adhesive layer 2, a middle layer 3, a second adhesive layer 4 and an inner layer 5. The composite sheet is respectively prepared into CPP (casting polypropylene)/adhesive layer (Tie)/0.3mm PE (polyethylene)/adhesive layer (Tie)/0.08mm PE (polyethylene), wherein the single-layer thickness of the adhesive layer (Tie) is 0.004mm, the total thickness of the composite sheet is about 0.43mm, the CPP is subjected to unidirectional stretching treatment, the inner layer is a multi-layer co-extrusion film of Mul-PE & EVOH (ethylene and ethylene-vinyl alcohol copolymer), and a polyurethane system adhesive is adopted, so that the finished composite sheet has good printing performance, inner layer heat sealing performance and material barrier performance, and simultaneously meets the synchronous high-stability processing of 4 dies and more than multiple groups of dies within the size of 100mm x 200 mm.
Example 9
A novel composite plastic uptake or blow molding sheet structure is shown in figure 1 and comprises a surface layer 1, a first adhesive layer 2, a middle layer 3, a second adhesive layer 4 and an inner layer 5. The composite sheet is respectively prepared into CPP (casting polypropylene)/adhesive layer (Tie)/0.25mm PP (polypropylene)/adhesive layer (Tie)/0.1mm PP (polypropylene) with the thickness of 0.04mm, wherein the single-layer thickness of the adhesive layer (Tie) is 0.004mm, the total thickness of the composite sheet is about 0.328mm, the CPP is subjected to unidirectional stretching treatment, the inner layer is a multi-layer co-extrusion film of Mul-PE & EVOH (ethylene-vinyl alcohol copolymer), a polyurethane system adhesive is adopted, the finished composite sheet has good printing performance, inner layer heat sealing performance and material barrier performance, and the synchronous high-stability processing of 4 dies with the size of 100mm x 200mm and more than multiple groups of dies is simultaneously met.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.
Claims (3)
1. The utility model provides a novel compound blister or blow molding sheet structure, includes surface course (1), first adhesive linkage (2), intermediate level (3), second adhesive linkage (4) and inlayer (5), its characterized in that:
the surface layer (1) is configured to be any one of a polyethylene terephthalate (PET) layer, a polypropylene (PP) layer and a modified polyethylene (MODPE) layer;
the middle layer (3) is configured to be any one of a Polystyrene (PS) layer, a polyvinyl chloride (PVC) layer, a Polyethylene (PE) layer, a polypropylene (PP) layer and modified polyethylene terephthalate (MODPET);
the inner layer (5) is configured to be any one of a Polyethylene (PE) layer, a polypropylene (PP) layer and a modified polyethylene terephthalate (MODPET) layer.
2. The novel composite blister or blow molded sheet structure of claim 1, wherein: the thickness of the surface layer (1) is 0.01mm-0.1 mm; the thickness of the middle layer (3) is 0.1mm-1.2 mm; the thickness of the inner layer (5) is 0.03mm-0.15 mm.
3. The novel composite blister or blow molded sheet structure of claim 1, wherein: the first bonding layer (2) and the second bonding layer (4) are identical in structure, and the thickness of the first bonding layer (2) and the thickness of the second bonding layer (4) are 0.001mm-0.01 mm.
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| CN114103363A (en) * | 2021-12-06 | 2022-03-01 | 上海艾录包装股份有限公司 | Novel composite plastic uptake or blow molding sheet structure and process method thereof |
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| CN114103363A (en) * | 2021-12-06 | 2022-03-01 | 上海艾录包装股份有限公司 | Novel composite plastic uptake or blow molding sheet structure and process method thereof |
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