CN110803388A - Outer bag film of personal care product and packaging bag thereof - Google Patents
Outer bag film of personal care product and packaging bag thereof Download PDFInfo
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- CN110803388A CN110803388A CN201911223039.9A CN201911223039A CN110803388A CN 110803388 A CN110803388 A CN 110803388A CN 201911223039 A CN201911223039 A CN 201911223039A CN 110803388 A CN110803388 A CN 110803388A
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- 239000010410 layer Substances 0.000 claims abstract description 115
- 239000000203 mixture Substances 0.000 claims abstract description 38
- 239000002994 raw material Substances 0.000 claims abstract description 33
- 239000012793 heat-sealing layer Substances 0.000 claims abstract description 26
- 230000004888 barrier function Effects 0.000 claims abstract description 23
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000012790 adhesive layer Substances 0.000 claims abstract description 18
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229920000092 linear low density polyethylene Polymers 0.000 claims abstract description 15
- 239000004707 linear low-density polyethylene Substances 0.000 claims abstract description 15
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- UFRKOOWSQGXVKV-UHFFFAOYSA-N ethene;ethenol Chemical compound C=C.OC=C UFRKOOWSQGXVKV-UHFFFAOYSA-N 0.000 claims abstract description 13
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- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims description 46
- 238000004026 adhesive bonding Methods 0.000 claims description 22
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- 238000002844 melting Methods 0.000 claims description 10
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Images
Classifications
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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
- B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
- B65D31/02—Bags or like containers made of paper and having structural provision for thickness of contents with laminated walls
-
- 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
- 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
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
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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
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)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
- 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
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
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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
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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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
- B65D33/00—Details of, or accessories for, sacks or bags
- B65D33/16—End- or aperture-closing arrangements or devices
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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
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/31—Heat sealable
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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
- B32B2307/408—Matt, dull surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
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- B32B2307/582—Tearability
- B32B2307/5825—Tear resistant
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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
- B32B2307/70—Other properties
- B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
- B32B2307/7145—Rot proof, resistant to bacteria, mildew, mould, fungi
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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
- B32B2307/70—Other properties
- B32B2307/724—Permeability to gases, adsorption
- B32B2307/7242—Non-permeable
- B32B2307/7246—Water vapor barrier
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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
- B32B2439/00—Containers; Receptacles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Packages (AREA)
- Bag Frames (AREA)
Abstract
The invention relates to an outer bag film of a personal care product, which has a total film thickness of 25-40 mu m and sequentially comprises a light eliminating layer, a covering layer, an upper bonding layer, a high barrier layer, a lower bonding layer, a water resisting layer and a heat sealing layer from top to bottom; wherein the raw material of the extinction layer is a mixture of 90 wt% of EVA and 10 wt% of extinction material; the raw material of the covering layer is a mixture of 80 wt% of LDPE and 20 wt% of white masterbatch; the raw materials of the upper adhesive layer and the lower adhesive layer are a mixture of 30 wt% of TIE and 70 wt% of LLDPE; the high barrier layer is made of EVOH; the raw material of the water-resisting layer is a mixture of 50 wt% of LDPE and 50 wt% of LLDPE; the raw material of the heat sealing layer is a mixture of 70 wt% of MLLDPE and 30 wt% of EVA. Meanwhile, the invention also provides a preparation method of the outer bag film and a packaging bag made of the outer bag film.
Description
Technical Field
The invention relates to the technical field of nursing product packaging, in particular to an outer bag film of a personal nursing product and a packaging bag thereof.
Background
Personal care products such as nursing pads, diapers, sanitary napkins, anti-galactorrhea pads, disposable underpants and the like are widely used in special periods such as hospital operations, gynecological examinations, puerperal nursing, infant nursing, paralyzed patients, patients with incontinence of urine and feces, patients with mobility difficulties, female menstrual period and the like because of convenient nursing and effective prevention of cross infection. These care products are typically in direct contact with human skin and therefore require rigorous sterilization and packaging for shipping. This requires that the outer bag which contains these products have excellent barrier, tear and heat seal properties, while at the same time a certain amount of hiding is required in order to protect the privacy of the individual against embarrassment when choosing and carrying them.
Most of the existing nursing product packaging bags are aluminum-plastic composite packaging films, for example, the patent with the name of CN 204384012U as the composite packaging film for the sanitary product packaging bag discloses a packaging film which is formed by compounding a PE layer and a VMPE layer, has good barrier property, flexibility and heat sealing property, but has poor tear resistance and durability, does not have covering property, and cannot meet market demands.
In addition, the existing nursing product packaging bag is not easy to open, and can not be resealed or has poor sealing effect after being mostly opened, so that the nursing product is invaded by bacteria, deliquesced and oxidized, and the storage life of the nursing product is shortened.
Therefore, there is a need to develop a new outer bag film for personal care products and a new outer bag for personal care products, so as to solve the above problems.
Disclosure of Invention
A first object of the present invention is to provide a personal care product overpouch film.
The second purpose of the invention is to provide a preparation method of the personal care product outer bag film.
A third object of the present invention is to provide a packaging bag made of the above outer bag film.
In order to achieve the purpose of the invention, the technical scheme of the invention is as follows:
the invention provides an outer bag film of a personal care product, which has a total film thickness of 25-40 mu m and sequentially comprises a light eliminating layer, a covering layer, an upper bonding layer, a high barrier layer, a lower bonding layer, a water blocking layer and a heat sealing layer from top to bottom; wherein the content of the first and second substances,
the extinction layer is made of a mixture of 90 wt% of EVA and 10 wt% of extinction material;
the raw material of the covering layer is a mixture of 80 wt% of LDPE and 20 wt% of white masterbatch;
the raw materials of the upper adhesive layer and the lower adhesive layer are the same and are a mixture of 30 wt% of TIE and 70 wt% of LLDPE;
the raw material of the high barrier layer is EVOH;
the raw material of the water-resistant layer is a mixture of 50 wt% of LDPE and 50 wt% of LLDPE;
the raw material of the heat sealing layer is a mixture of 70 wt% of MLLDPE and 30 wt% of EVA.
Further, the raw material of the heat sealing layer is a mixture of 70 wt% of Surlyn and 30 wt% of EVA
Further, the thicknesses of the extinction layer, the covering layer, the upper adhesive layer, the high barrier layer, the lower adhesive layer, the water-resistant layer and the heat-sealing layer are respectively 10-20%, 5-10%, 10-20% and 10-20% of the total film thickness.
Furthermore, the thicknesses of the extinction layer, the covering layer, the upper adhesive layer, the high barrier layer, the lower adhesive layer, the water-resistant layer and the heat-sealing layer are respectively 18%, 17%, 10%, 7%, 10%, 18% and 20% of the total film thickness.
Further, the TIE has a density ranging from 0.91 to 0.925g/ml and a melt index ranging from 1 to 5.
Further, the density of the EVOH ranges from 1.17 g/ml to 1.25g/ml, and the ethylene content of the EVOH is lower than 44%.
The second aspect of the present invention provides a method for preparing the personal care product outer bag film, comprising the following steps:
preparing raw material particles according to the components of the structure of the extinction layer, the covering layer, the upper bonding layer, the high barrier layer, the lower bonding layer, the water-resistant layer and the heat-sealing layer, respectively sending the raw material particles of each layer into corresponding hoppers of an extruder from top to bottom, extruding and blowing the raw material particles through corresponding die orifices after melting to form film bubbles, determining the diameter and the thickness of the film bubbles through a sizing cage through an air ring, and then cutting and rolling to obtain the outer bag film of the personal care product.
Further, the melting temperatures of the extinction layer, the cover layer, the upper adhesion layer, the high barrier layer, the lower adhesion layer, the water-resistant layer and the heat-sealing layer are respectively 170-220 ℃, 180-230 ℃, 180-210 ℃, 180-230 ℃, 180-220 ℃ and 180-220 ℃.
The invention provides a packaging bag made of the outer bag film, which comprises a bag body, wherein an opening area is arranged on the front surface of the bag body, and an opening strip is arranged right above the opening area; the opening area comprises a first sub-gluing area, a sealing line, a sealing groove and a second sub-gluing area; a group of sealing grooves are horizontally arranged at the section from the sealing line to the upper edge of the opening area and the section from the sealing line to the lower edge of the opening area; the opening strip comprises an opening strip main body, one end of the opening strip main body and the rightmost end of the opening area are integrally designed, and the other end of the opening strip main body is provided with an opening section; the inner side of the uncovering strip main body is provided with a first primary adhesive area, a sealing rib and a second primary adhesive area at the positions corresponding to the first secondary adhesive area, the sealing groove and the second secondary adhesive area.
Furthermore, the first sub-gluing area and the second sub-gluing area are respectively arranged at the left end and the right end of the opening area; the sealing line is arranged on the central line of the opening area, and two ends of the sealing line are respectively connected with the first sub-gluing area and the second sub-gluing area.
Further, the length and width of the main body of the uncovering strip are consistent with those of the opening area.
Further, the length of the opening area is consistent with the length of the front surface of the bag body.
Further, the length, the thickness and the height of the sealing convex edge are matched with the length, the width and the depth of the sealing groove.
Compared with the prior art, the invention has the advantages and beneficial effects that:
1. the outer bag film is produced by a multilayer coextrusion film blowing process, and the surface layer is made of a mixture of EVA and a delustering material, so that the surface layer has a matte effect and good flexibility, and the outer bag film is more marketable; meanwhile, the design of the covering layer made of the mixture of LDP E and white masterbatch can well cover the packaged product, thereby effectively preventing embarrassment when customers select and carry the product; the water-resistant layer made of the mixture of LDPE and LLDPE effectively prevents water vapor in the air from accumulating on the surface of the barrier layer through the surface layer to cause the barrier layer to be corroded and lose efficacy, thereby prolonging the service life of the bagged film; the heat sealing layer adopts the mixed design of MLLDPE and EVA, not only plays a role in low-temperature sealing, but also has an antibacterial function; in addition, the adhesive layer adopts the mixed design of TIE and LLDPE, so that the adhesion degree of the outer bag film is greatly improved, and the tear resistance of the outer bag film is improved;
2. the design of the opening area and the uncovering strip of the packaging bag of the invention facilitates the bag opening to take the product, and the resealing function of the packaging bag better prevents the entry of external bacteria and the deliquescence and oxidation of the product, thereby prolonging the storage life of the product.
Drawings
FIG. 1 is a schematic diagram of a structure hierarchy in embodiment 1 of the present invention;
FIG. 2 is a schematic diagram of a structure hierarchy according to embodiment 3 of the present invention;
FIG. 3 is a first schematic view of the overall structure of a packaging bag according to embodiment 6 of the present invention;
FIG. 4 is a second schematic view of the overall structure of a packaging bag according to embodiment 6 of the present invention;
FIG. 5 is a schematic view of the front seal of the package in accordance with example 6 of the present invention;
reference numerals: the bag comprises a bag body 1, a uncovering strip 2, an uncovering section 3, a first sub-gluing area 4, a sealing line 5, a sealing groove 6, a second sub-gluing area 7, a first mother gluing area 8, a sealing rib 9 and a second mother gluing area 10.
Detailed Description
The invention is further described below with reference to the following figures and specific examples.
The raw materials used in the examples of the present invention are shown in table 1 below, but not limited thereto:
TABLE 1
Example 1
As shown in figure 1, the personal care product outer bag film with the film thickness of 30 μm comprises a light eliminating layer, a covering layer, an upper bonding layer, a high barrier layer, a lower bonding layer, a water resisting layer and a heat sealing layer from top to bottom in sequence;
the extinction layer is made of a mixture of EVA (ethylene vinyl acetate) and an extinction material, the thickness of the extinction layer is 18% of the total film thickness, and the addition of the extinction material enables the surface layer to have a matte effect and good flexibility, so that the outer bag film is more marketable;
the raw material of the covering layer is a mixture of LDPE and white masterbatch, the thickness of the covering layer is 17% of the total film thickness, and the personal care product is a privacy commodity, so that the design of the covering layer can well cover the packaged product, and embarrassment caused by selection and carrying of customers is effectively prevented;
the raw materials of the upper bonding layer and the lower bonding layer are both a mixture of TIE and LLDPE, the thickness of the upper bonding layer and the lower bonding layer is 10% of the total film thickness, and the bonding layer adopts the mixed design of the TIE and the LLDPE, so that the bonding degree of the outer bag film is greatly improved, and the tear resistance of the outer bag film is improved;
the high barrier layer is made of EVOH (ethylene-vinyl alcohol copolymer), the thickness of the high barrier layer is 7% of the total film thickness, the long shelf life and the preservation effect of a packaged product are ensured, and the film has good flexibility, tensile strength and low-temperature heat sealing performance;
the raw material of the water-resistant layer is a mixture of LDPE and LLDPE, the thickness of the water-resistant layer is 18% of the total film thickness, and the design of the water-resistant layer prevents water vapor in the air from accumulating on the EVOH layer through the surface layer to cause the EVOH to be corroded and lose efficacy, so that the service life of the bagged film is prolonged;
the raw material of the heat sealing layer is a mixture of MLLDPE and EVA, the thickness of the heat sealing layer is 20% of the total film thickness, and the heat sealing layer adopts a mixed design of the MLLDPE and the EVA, so that the heat sealing layer not only has a low-temperature sealing effect, but also has an antibacterial function.
Further, the density range of the TIE is 0.91-0.925 g/ml, and the melt index is 1-5; the density range of the EVOH is 1.17-1.25 g/ml, and the ethylene content in the EVOH is lower than 44%.
The preparation method of the personal care product outer bag film comprises the following steps:
the extinction layer is formed by uniformly mixing EVA and extinction material according to the mass ratio of 9:1, adding the mixture into a corresponding extruder hopper, melting the mixture at the temperature of 170-220 ℃ and entering a neck mold;
covering layer, mixing LDPE and white masterbatch uniformly according to the mass ratio of 4:1, adding into a corresponding extruder hopper, melting at the temperature of 180-;
an adhesive layer is arranged, TIE and LLDPE are uniformly mixed according to the mass ratio of 3:7, added into a corresponding hopper of an extruder, melted at the temperature of 180-;
the barrier layer is prepared by adding EVOH into a corresponding hopper of an extruder, melting at the temperature of 180-;
a lower adhesive layer, namely uniformly mixing the TIE and the LLDPE according to the mass ratio of 3:7, adding the mixture into a corresponding hopper of an extruder, melting the mixture at the temperature of 180 ℃ and 230 ℃, and entering a neck mold;
the water-blocking layer is prepared by uniformly mixing raw materials PE of LDPE and LLDPE according to the mass ratio of 1:1, adding the mixture into a corresponding extruder hopper, melting the mixture at the temperature of 180 ℃ and 220 ℃, and entering a neck mold;
a heat sealing layer, namely uniformly mixing MLLDPE and EVA according to the mass ratio of 7:3, adding the mixture into a corresponding extruder hopper, melting the mixture at the temperature of 180 ℃ and 220 ℃, and entering a neck mold;
then, extruding a film bubble of the multilayer co-extruded film through a die orifice, cooling a sizing cage on the outer side of the film bubble above the die orifice through an air ring to determine the diameter of the film bubble, and supporting the floating of the film bubble by air flow sprayed by a plurality of air cushion rollers above the sizing cage; the sizing cage and the air cushion roller cool the film bubble, so that the film bubble has certain structural strength, and the fixed diameter and the fixed thickness of the film bubble are determined; simultaneously, the bubble is supported by the air current of air cushion roller and sizing cage and is floated, can not produce the friction with the bubble, avoids the bubble surface to produce phenomenons such as wire drawing, ensures the best quality on membrane limit: and (4) sizing and cooling the film bubble, cutting the film bubble into a sheet-shaped film, and rolling to obtain the outer bag film.
Example 2
The only difference compared to example 1 is: a personal care product outer bag film having a film thickness of 40 μm was prepared, and the layered structure, the ratio of the thickness of each layer to the film thickness, and the raw material formulation of each layer were the same as those of example 1.
Example 3
The only difference compared to example 1 is: the raw materials of the heat sealing layer are formed by mixing Surlyn and EVA according to the mass ratio of 7:3, and the rest is the same as that of the heat sealing layer in the embodiment 1, as shown in figure 2.
Example 4
The only difference compared to example 2 is: a personal care product outer bag film having a film thickness of 40 μm was prepared, and the layered structure, the ratio of the thickness of each layer to the film thickness, and the raw material formulation of each layer were the same as those of example 2.
Example 5
The only difference compared to example 1 is: a personal care product outer bag film having a film thickness of 25 μm was prepared, and the layered structure, the ratio of the thickness of each layer to the film thickness, and the raw material formulation of each layer were the same as those of example 1.
Comparative example 1
The only difference compared to example 1 is: the extinction layer is prepared by mixing LDPE and extinction material according to the mass ratio of 9:1, and the balance is the same as in the embodiment 1.
Performance testing of examples 1-5 and comparative example 1
The tensile strength, elongation at break, coverage, peel strength, heat seal strength and oxygen permeability of the outer bag films prepared in the above examples 1-5 and comparative example 1 were tested according to the national standard GB/T10004-: GB/T1040.3-2006, GB/T1040.3-2006, GB/T2410-2008, GB/T8808-1988, QB/T2358-1998 and GB/T1038-2000, the test data are shown in the following table 2:
TABLE 2
From table 2, it can be seen that: the peel strength test results of examples 1 to 5 and comparative example 1, which are all not peeled, illustrate that the adhesion between the layers of the outer bag films obtained in examples 1 to 5 and comparative example 1 is particularly strong, and it is known from their formulation that the adhesive layer is optimally formulated using a mixture of TIE and LLDPE (mass ratio 3: 7); in addition, as can be seen from other performance data of comparative example 1 and comparative example 1, each performance of example 1 is better than that of comparative example 1, so that the mixing ratio of the EVA and the extinction material PE adopted in the extinction layer is better; in addition, by comparing the performance data of example 1 and example 3, and example 2 and example 4, respectively, it can be seen that the heat seal layer is better to use MLLDPE for the mixing ratio of Surlyn and EVA.
The outer bag film is produced by a multilayer coextrusion film blowing process, the surface layer has an extinction effect, the inner layer has a covering effect, and the heat sealing layer has low-temperature sealing and antibacterial functions, and is good in flexibility, good in barrier property and not easy to tear.
Example 6
As shown in fig. 3-5, the present invention provides a packaging bag made of the above outer bag film, comprising a bag body 1, an opening area is provided on the front surface of the bag body 1, and a tearing strip 2 is provided directly above the opening area; the length of the opening area is consistent with that of the front surface of the bag body 1, and the opening area comprises a first sub-gluing area 4, a sealing line 5, a sealing groove 6 and a second sub-gluing area 7; the first sub-gluing area 4 and the second sub-gluing area 7 are respectively arranged at the left end and the right end of the opening area; the sealing line 5 is arranged on the central line of the opening area, and two ends of the sealing line 5 are respectively connected with the first sub-gluing area 4 and the second sub-gluing area 7; a group of sealing grooves 6 are horizontally arranged at the section from the sealing line 5 to the upper edge of the opening area and from the sealing line 5 to the lower edge of the opening area; the uncovering strip 2 comprises an uncovering strip main body, and the length and the width of the uncovering strip main body are consistent with those of the opening area; one end of the uncovering strip main body and the rightmost end of the opening area are designed integrally, and the other end of the uncovering strip main body is provided with an uncovering section 3; a first female adhesive area 8, a sealing rib 9 and a second female adhesive area 10 are respectively arranged at the corresponding positions of the inner side of the opening strip main body and the first sub adhesive area 4, the sealing groove 6 and the second sub adhesive area 7; the length, the thickness and the height of the sealing convex edge 9 are matched with the length, the width and the depth of the sealing groove 6.
When the packaging bag is used, the opening section 3 is pinched to open the opening strip 2, the upper side and the lower side of the sealing line 5 are pulled to form an opening, articles can be taken out of the packaging bag, the opening strip 2 is immediately closed after the articles are taken out, at the moment, the second primary adhesive area 10 and the second secondary adhesive area 7 of the opening strip 2 are overlapped and bonded together, the sealing rib 9 is embedded into the sealing groove 6 from the root part, and finally the first primary adhesive area 8 and the first secondary adhesive area 4 are overlapped and bonded together, so that the sealing effect can be achieved again.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the embodiments disclosed, but is capable of various modifications and substitutions without departing from the spirit of the invention.
Claims (10)
1. An outer bag film for personal care products is characterized in that the total film thickness is 25-40 mu m, and the outer bag film sequentially comprises a light eliminating layer, a covering layer, an upper bonding layer, a high barrier layer, a lower bonding layer, a water resisting layer and a heat sealing layer from top to bottom; wherein the content of the first and second substances,
the extinction layer is made of a mixture of 90 wt% of EVA and 10 wt% of extinction material;
the raw material of the covering layer is a mixture of 80 wt% of LDPE and 20 wt% of white masterbatch;
the raw materials of the upper adhesive layer and the lower adhesive layer are the same and are a mixture of 30 wt% of TIE and 70 wt% of LLDPE;
the raw material of the high barrier layer is EVOH;
the raw material of the water-resistant layer is a mixture of 50 wt% of LDPE and 50 wt% of LLDPE;
the raw material of the heat sealing layer is a mixture of 70 wt% of MLLDPE and 30 wt% of EVA.
2. The personal care product outer bag film according to claim 1, wherein the raw material of the heat sealing layer is a mixture of 70 wt% Surlyn and 30 wt% EVA.
3. The personal care product outer bag film according to claim 1, wherein the thickness of the matte layer, the cover layer, the upper adhesive layer, the high barrier layer, the lower adhesive layer, the water-resistant layer and the heat-sealing layer is 10-20%, 5-10%, 10-20% and 10-20% of the total film thickness respectively.
4. The personal care product pouch film as in claim 3, wherein the thickness of the matte layer, the cover layer, the upper adhesive layer, the high barrier layer, the lower adhesive layer, the water-resistant layer and the heat-sealing layer is 18%, 17%, 10%, 7%, 10%, 18% and 20% of the total film thickness respectively.
5. The personal care product overwrap film of claim 1, wherein said TIE has a density in the range of 0.91-0.925 g/ml and a melt index in the range of 1-5; the density range of the EVOH is 1.17-1.25 g/ml, and the ethylene content in the EVOH is lower than 44%.
6. The method of making a personal care product outer bag film according to any one of claims 1 to 5, comprising the steps of:
preparing raw material particles according to components of the structure of the extinction layer, the covering layer, the upper bonding layer, the high barrier layer, the lower bonding layer, the water-resistant layer and the heat-sealing layer, respectively sending the raw material particles of each layer into corresponding hoppers of an extruder from top to bottom, extruding and blowing the raw material particles through corresponding die orifices after melting to form film bubbles, determining the diameter and the thickness of the film bubbles through a sizing cage through an air ring, and then cutting and rolling to obtain the outer bag film of the personal care product; wherein the melting temperatures of the extinction layer, the cover layer, the upper adhesion layer, the high barrier layer, the lower adhesion layer, the water-blocking layer and the heat-sealing layer are respectively 170-220 ℃, 180-230 ℃, 180-210 ℃, 180-230 ℃, 180-220 ℃ and 180-220 ℃.
7. A packaging bag made of the outer bag film according to any one of claims 1 to 6, comprising a bag body having an opening area provided on a front surface thereof and a tear strip provided directly above the opening area; the opening area comprises a first sub-gluing area, a sealing line, a sealing groove and a second sub-gluing area; the first sub-gluing area and the second sub-gluing area are respectively arranged at the left end and the right end of the opening area; the sealing line is arranged on the central line of the opening area, and two ends of the sealing line are respectively connected with the first sub-gluing area and the second sub-gluing area; a group of sealing grooves are horizontally arranged at the section from the sealing line to the upper edge of the opening area and the section from the sealing line to the lower edge of the opening area; the opening strip comprises an opening strip main body, one end of the opening strip main body and the rightmost end of the opening area are integrally designed, and the other end of the opening strip main body is provided with an opening section; the inner side of the uncovering strip main body is provided with a first primary adhesive area, a sealing rib and a second primary adhesive area at the positions corresponding to the first secondary adhesive area, the sealing groove and the second secondary adhesive area.
8. The package of claim 7 wherein the length and width of the strip body correspond to the length and width of the opening area.
9. The package of claim 7 wherein the length of the open area corresponds to the length of the front face of the body.
10. The package of claim 7, wherein the sealing fin has a length, thickness and height that match the length, width and depth of the sealing groove.
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Cited By (1)
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| CN110901195A (en) * | 2019-12-03 | 2020-03-24 | 江阴升辉包装材料有限公司 | Personal care product outer bag film and preparation method thereof |
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Application publication date: 20200218 |