[go: up one dir, main page]

CN119217787A - A method for preparing an interlayer separation membrane - Google Patents

A method for preparing an interlayer separation membrane Download PDF

Info

Publication number
CN119217787A
CN119217787A CN202310793094.1A CN202310793094A CN119217787A CN 119217787 A CN119217787 A CN 119217787A CN 202310793094 A CN202310793094 A CN 202310793094A CN 119217787 A CN119217787 A CN 119217787A
Authority
CN
China
Prior art keywords
layer
sealing
sealing layer
film
stripping
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310793094.1A
Other languages
Chinese (zh)
Inventor
盛佳
王震业
王凤凯
李洪亮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangyin Huanyuan Aluminum Plastic Pack Co ltd
Inner Mongolia Mengniu Dairy Group Co Ltd
Original Assignee
Jiangyin Huanyuan Aluminum Plastic Pack Co ltd
Inner Mongolia Mengniu Dairy Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiangyin Huanyuan Aluminum Plastic Pack Co ltd, Inner Mongolia Mengniu Dairy Group Co Ltd filed Critical Jiangyin Huanyuan Aluminum Plastic Pack Co ltd
Priority to CN202310793094.1A priority Critical patent/CN119217787A/en
Publication of CN119217787A publication Critical patent/CN119217787A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/14—Cutting, e.g. perforating, punching, slitting or trimming
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • B31B70/62—Uniting opposed surfaces or edges; Taping by adhesives
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal 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
    • B32B15/085—Layered products comprising a layer of metal comprising metal 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 comprising polyolefins
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • 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
    • B32B7/06—Interconnection of layers permitting easy separation
    • 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

Landscapes

  • Laminated Bodies (AREA)

Abstract

The invention discloses a preparation method of an interlayer separation film, which comprises the steps of compositing a sealing layer and a bottom film to form a supporting composite layer, cutting the supporting composite layer to form a drinking opening on the sealing layer, compositing the sealing layer on the supporting composite layer with a blocking layer through colloid, solidifying the colloid between the blocking layer and the sealing layer to form a stripping layer, wherein the stripping strength between the bottom film and the sealing layer on the supporting composite layer is smaller than the stripping strength between the blocking layer and the sealing layer, and removing the bottom film to form the interlayer separation film. The interlayer separation membrane prepared by the invention has good sealing performance and easy uncovering property, and has high yield.

Description

Preparation method of interlayer separation membrane
Technical Field
The invention relates to the field of packaging, in particular to a preparation method of an interlayer separation membrane.
Background
Conventional lidding films are typically obtained by compounding a barrier layer and a heat seal layer, all having an overall thickness of less than 200 μm. When the novel suction tube is used, a suction tube inserting mode is adopted conventionally, the suction tube is needed, when the cover film is high in hardness or the suction tube is unreasonable to be arranged, the suction tube is often damaged and cannot be inserted into the cup body, the operation is very inconvenient, and the use of the suction tube is very not environment-friendly.
In order to solve the problems that the prior straw is not environment-friendly in use and the operation is inconvenient because the straw is damaged when the straw is inserted into the cover film, an interlayer separating film with at least 3 layers of structures is developed, wherein the interlayer separating film is provided with a barrier layer, a stripping layer and a heat sealing layer from outside to inside, a low-strength adhesive is used as the stripping layer to be compounded with the barrier layer and the heat sealing layer, and a drinking port is formed in the heat sealing layer.
However, in the process of producing the interlayer separating film, it is necessary to cut the heat seal layer to form an opening because the heat seal layer is required to be provided with a drinking port. And in the actual preparation process, a plurality of problems exist, so that the preparation yield is low. Specifically, in the process of cutting and preparing the drinking port on the heat sealing layer, the cutter head is required to be used for processing the heat sealing layer to form an opening, and because the heat sealing layer is softer in material, lower in hardness and higher in extensibility, if the cutter blade is directly used for cutting and forming the opening on the heat sealing layer, then the heat sealing layer is compounded with the barrier layer, the heat sealing layer can be obviously deformed in the mode, and the drinking port position of the prepared interlayer separation film cannot be fixed, so that the yield of the finally obtained interlayer separation film is lower. The cutter head precision is required to be accurately controlled if the mode that the blocking layer and the heat sealing layer are compounded and then reversely cut the cover film to form the drinking opening on the heat sealing layer is adopted, and the cutter head precision is particularly because the blocking layer is made of an Al material with good blocking effect, the toughness is small, stress cracking can occur under certain pressure, the cutter head can not damage the blocking layer although cutting is too shallow, the purpose of forming the opening on the heat sealing layer can not be achieved, and the blocking layer can be damaged if cutting is too deep, the stress cracking occurs on the blocking layer, the sealing performance of the interlayer separating film is lost, and the sealing purpose can not be achieved. The precision of the cutter head cannot be accurately controlled by the existing adopted equipment, and therefore the purposes of effectively forming an opening on the heat sealing layer and not damaging the blocking layer cannot be achieved.
Disclosure of Invention
Therefore, the invention aims to solve the technical problem that the interlayer separation film disclosed in the prior art has low qualification rate by adopting a conventional preparation method, thereby providing a preparation method of the interlayer separation film capable of more effectively preparing the qualified interlayer separation film.
For this purpose, the invention provides the following technical scheme:
a method for producing an interlayer separation membrane, comprising:
the sealing layer and the bottom film are compounded to form a supporting composite layer, and the supporting composite layer is cut to form a drinking opening on the sealing layer, wherein the bottom film is made of a material with the compressive strength of 50MPa-350MPa and the elongation of 90% -500%;
and compounding the sealing layer on the support composite layer with the blocking layer through colloid, solidifying the colloid between the blocking layer and the sealing layer to form a stripping layer, wherein the stripping strength between the bottom film and the sealing layer on the support composite layer is smaller than that between the blocking layer and the sealing layer, and removing the bottom film to form an interlayer separating film.
The tensile strength of the base film is 150-200 MPa, the elongation is 110-140%, and the base film is preferably made of CPP.
And the peel strength between the bottom film and the sealing layer on the support composite layer is less than 0.1N/15mm.
The peel strength between the barrier layer and the sealing layer is greater than 1N/15mm, preferably 1-7N/15mm, more preferably 2-4N/15mm.
The thickness of the carrier film is 30-70 microns, preferably 50-70 microns.
The stripping layer is two layers, namely a primer layer formed by curing acrylic colloid and a surface adhesive layer formed by curing polyurethane colloid, and the primer layer is arranged adjacent to the blocking layer.
The coating amount of the primer layer is 0.05-0.15g/m 2, the coating amount of the topcoat layer is 0.3-4.5g/m 2, and the coating amount of the topcoat layer is preferably 0.5-1.5g/m 2, so that the purpose of stripping between the barrier layer and the sealing layer can be achieved, and sealing between the sealing layer and the container is not affected.
The barrier layer is made of Al;
and/or, the material of the sealing layer is CPP.
The thickness of the barrier layer is 30-70 microns;
And/or the thickness of the sealing layer is 30-70 microns.
The stripping layer is formed at a curing temperature of 40-75 ℃ and a curing time of 48-72h, preferably 65+ -5 ℃ and 48h.
The technical scheme of the invention has the following advantages:
1. the preparation method of the interlayer separation film comprises the steps of firstly forming a support composite layer containing a sealing layer, then cutting the support composite layer to form a drinking opening on the sealing layer, then compounding the sealing layer with a barrier layer by adopting colloid, forming a stripping layer between the sealing layer and the barrier layer by adopting colloid, and finally removing a bottom film on the sealing layer to form the interlayer separation film with the barrier layer, the stripping layer and the sealing layer, wherein the bottom film is made of a material with the compressive strength of 50MPa-350MPa and the elongation of 90-500%, the sealing layer can be cut off so as to form the drinking opening, the sealing layer is not deformed, and meanwhile, the prepared interlayer separation film has good sealing performance and easy uncovering property, and the yield of the prepared interlayer separation film is effectively ensured.
2. In the preparation method of the interlayer separation film, the base film is made of CPP, has proper compressive strength and elongation, can be compounded with the sealing layer in a static manner and can be compounded with the sealing layer in a glue manner, and the base film and the sealing layer can be more effectively stripped and removed in the last step by only ensuring that the stripping strength between the base film and the sealing layer is less than 0.1N/15 mm. When the method of compounding with static electricity is adopted, the static electricity adsorption between materials is directly utilized without colloid, the compounding between the base film and the sealing layer can be effectively ensured, the cutting requirement is met, the preparation cost is effectively saved, and when the method of compounding with static electricity is adopted, the stability after compounding is higher, and the operation is more stable.
3. According to the preparation method of the interlayer separation film, the peel strength between the bottom film and the sealing layer is smaller than 0.1N/15mm, the peel strength between the barrier layer and the sealing layer is set to be larger than 1N/15mm, the bottom film and the sealing layer are matched with each other, the influence on the peeling layer in the process of removing the bottom film in the preparation process can be avoided, the peel strength between the barrier layer and the sealing layer is further limited to be 2-4N/15mm, the separation between the sealing layer and the barrier layer can be more conveniently ensured in the use process, and further good sealing property and easy uncovering property of the prepared interlayer separation film can be effectively ensured.
4. The preparation method of the interlayer separation film does not need a high-precision roller cutter die edge and does not need to frequently replace the roller cutter die to keep the precision, meanwhile, the hole cutting effect is judged in advance by peeling the bottom film and the sealing film, the situation of cutting a cut can be judged without uncovering after the cover film is completely manufactured and sealed with a cup, the production period is shortened, and the yield is improved.
Detailed Description
The following examples are provided for a better understanding of the present invention and are not limited to the preferred embodiments described herein, but are not intended to limit the scope of the invention, any product which is the same or similar to the present invention, whether in light of the present teachings or in combination with other prior art features, falls within the scope of the present invention.
The specific experimental procedures or conditions are not noted in the examples and may be followed by the operations or conditions of conventional experimental procedures described in the literature in this field. The reagents or apparatus used were conventional reagent products commercially available without the manufacturer's knowledge.
In the following embodiment, the tensile strength detection method is GB/T28118-2011;
the elongation rate detection method comprises GB 1040.3 (thickness <1 mm), GB 1040.2 (thickness >1 mm);
the peel strength is detected by GB/T8808-1988;
The coating amount detection method comprises the following steps:
The first step (sampling) is to take a flat sample with the length of about 100cm from a machine, the second step (cutting the sample) is to cut 4 samples with the length of 100 square cm by a sampling knife, the third step (weighing the hair) is to weigh the glued hair by an electronic balance and record, the fourth step (wiping the glue) is to repeatedly wipe the glue for more than three times by dipping ethyl ester in cloth and carefully observing whether the glue is wiped clean or not, and the fifth step (weighing the clear weight) is to weigh the aluminum foil by the electronic balance and record. And a sixth step (calculation) of calculating a coating amount result according to the area of each sample by using an electronic calculator according to the formula of (gross weight-net weight)/number of samples = gram weight of glue per sample.
Example 1:
a method for producing an interlayer separation membrane, comprising:
The preparation method comprises the steps of obtaining a sealing layer with the thickness of 50 mu m and the CPP (chlorinated polyethylene) material, obtaining a base film with the thickness of 55 mu m and the CPP material, wherein the tensile strength of the base film is 170-200MPa, the elongation of the base film is 130-150% (the average tensile strength is 173.44MPa, and the average elongation is 138.80%);
forming a drinking opening, namely compounding the sealing layer with the bottom film to form a supporting composite layer, and cutting the supporting composite layer to form the drinking opening on the sealing layer;
And forming a stripping layer, namely coating an acrylic ester colloid solution for forming a primer layer on the blocking layer, coating a polyurethane colloid solution on the acrylic ester colloid solution for forming the primer layer, and respectively forming a primer layer and a surface adhesive layer by using the acrylic ester colloid and the polyurethane colloid after drying, wherein the coating weight of the primer layer on the blocking layer is 0.1-0.15g/m 2, and the coating weight of the surface adhesive layer is 0.5-1.5g/m 2. Contacting and compounding one side of a sealing layer of the support composite layer with one side of a surface adhesive layer on the barrier layer, and forming a stripping layer between the barrier layer and the sealing layer after heat curing for 48 hours at 65+/-5 ℃;
The interlayer separation film is obtained by forming a stripping layer, wherein the average value of stripping strength between a blocking layer and a sealing layer is about 2.71N/15mm, and the stripping strength between a bottom film and the sealing layer is less than 0.1N/15mm, so that the bottom film is very easy to strip from the sealing layer, the interlayer separation film is obtained after the bottom film is removed, then embossing and die cutting are carried out on the interlayer separation film, and a die cutter is used for positioning the outline positioning line of the sealing layer film to finish die cutting, so that the sealing cover film is formed.
Example 2:
a method for producing an interlayer separation membrane, comprising:
The preparation method comprises the steps of obtaining a sealing layer with the thickness of 50 mu m and the material of CPP, obtaining a bottom film with the thickness of 70 mu m and the material of CPP, wherein the strength of the bottom film is 300-350MPa, the extensibility is 90-130%, obtaining a blocking layer with the thickness of 50 mu m and the material of Al, obtaining an acrylic ester colloid solution and obtaining a polyurethane colloid solution;
forming a drinking opening, namely compounding the sealing layer with the bottom film to form a supporting composite layer, and cutting the supporting composite layer to form the drinking opening on the sealing layer;
And forming a stripping layer, namely coating an acrylic ester colloid solution for forming a primer layer on the blocking layer, coating the acrylic ester colloid solution for forming the primer layer on the polyurethane colloid solution, drying, and respectively forming a primer layer and a face glue layer by the acrylic ester colloid and the polyurethane colloid, wherein the coating weight of the primer layer on the blocking layer is 0.05-0.15g/m 2, and the coating weight of the face glue layer is 1.5-2.5g/m 2. Contacting and compounding one side of a sealing layer of the support composite layer with one side of a surface adhesive layer on the barrier layer, and forming a stripping layer between the barrier layer and the sealing layer after heat curing for 48 hours at 65+/-5 ℃;
The interlayer separation film is obtained by forming a stripping layer, wherein the average value of stripping strength between a blocking layer and a sealing layer is about 3.35N/15mm, and the stripping strength between a bottom film and the sealing layer is less than 0.1N/15mm, so that the bottom film is very easy to strip from the sealing layer, the interlayer separation film is obtained after the bottom film is removed, then embossing and die cutting are carried out on the interlayer separation film, and a die cutter is used for positioning the outline positioning line of the sealing layer film to finish die cutting, so that the sealing cover film is formed.
Example 3:
a method for producing an interlayer separation membrane, comprising:
The preparation method comprises the steps of obtaining a sealing layer with the thickness of 50 mu m and the material of CPP, obtaining a base film with the thickness of 45 mu m and the material of CPP, wherein the tensile strength of the base film is 130-160MPa, the elongation is 150-180%, obtaining a blocking layer with the thickness of 50 mu m and the material of Al, obtaining an acrylic ester colloid solution and obtaining a polyurethane colloid solution;
forming a drinking opening, namely compounding the sealing layer with the bottom film to form a supporting composite layer, and cutting the supporting composite layer to form the drinking opening on the sealing layer;
And forming a stripping layer, namely coating an acrylic ester colloid solution for forming a primer layer on the blocking layer, coating the acrylic ester colloid solution for forming the primer layer on the polyurethane colloid solution, drying, and respectively forming a primer layer and a surface adhesive layer by the acrylic ester colloid and the polyurethane colloid, wherein the coating weight of the primer layer on the blocking layer is 0.05-0.15g/m 2, and the coating weight of the surface adhesive layer is 2-3g/m 2. Contacting and compounding one side of a sealing layer of the support composite layer with one side of a surface adhesive layer on the barrier layer, and forming a stripping layer between the barrier layer and the sealing layer after heat curing for 72 hours at 45+/-5 ℃;
The interlayer separation film is obtained by forming a stripping layer, wherein the average value of stripping strength between a blocking layer and a sealing layer is about 5.42N/15mm, and the stripping strength between a bottom film and the sealing layer is less than 0.1N/15mm, so that the bottom film is very easy to strip from the sealing layer, the interlayer separation film is obtained after the bottom film is removed, then embossing and die cutting are carried out on the interlayer separation film, and a die cutter is used for positioning the outline positioning line of the sealing layer film to finish die cutting, so that the sealing cover film is formed.
Example 4:
a method for producing an interlayer separation membrane, comprising:
the preparation method comprises the steps of obtaining a sealing layer with the thickness of 50 mu m and the material of CPP, obtaining a bottom film with the thickness of 30 mu m and the material of CPP, wherein the strength of the bottom film is 90-130MPa, the extensibility is 180-200%, obtaining a blocking layer with the thickness of 50 mu m and the material of Al, obtaining an acrylic ester colloid solution and obtaining a polyurethane colloid solution;
forming a drinking opening, namely compounding the sealing layer with the bottom film to form a supporting composite layer, and cutting the supporting composite layer to form the drinking opening on the sealing layer;
And forming a stripping layer, namely coating an acrylic acid ester colloid solution on the Al layer, then coating a polyurethane colloid solution on the acrylic acid ester colloid solution for forming a primer layer, and respectively forming a primer layer and a surface adhesive layer by the acrylic acid ester colloid and the polyurethane colloid after drying, wherein the coating weight of the primer layer on the Al layer is 0.05-0.15g/m 2, and the coating weight of the surface adhesive layer is 3.5-4.5g/m 2. Contacting and compounding one side of a sealing layer of the support composite layer with one side of a surface adhesive layer on the barrier layer, and forming a stripping layer between the barrier layer and the sealing layer after heat curing for 48 hours at 65+/-5 ℃;
The interlayer separation film is obtained by forming a stripping layer, wherein the average value of stripping strength between a blocking layer and a sealing layer is about 6.83N/15mm, and the stripping strength between a bottom film and the sealing layer is less than 0.1N/15mm, so that the bottom film is very easy to strip from the sealing layer, the interlayer separation film is obtained after the bottom film is removed, then embossing and die cutting are carried out on the interlayer separation film, and a die cutter is used for positioning the outline positioning line of the sealing layer film to finish die cutting, so that the sealing cover film is formed.
Example 5:
a method for producing an interlayer separation membrane, comprising:
The preparation method comprises the steps of obtaining a sealing layer with the thickness of 30 mu m and the material of CPP, obtaining a base film with the thickness of 55 mu m and the material of CPP, wherein the strength of the base film is 160-180MPa, the extensibility is 130-150%, obtaining a blocking layer with the thickness of 35 mu m and the material of Al, obtaining an acrylic ester colloid solution and obtaining a polyurethane colloid solution;
forming a drinking opening, namely compounding the sealing layer with the bottom film to form a supporting composite layer, and cutting the supporting composite layer to form the drinking opening on the sealing layer;
And forming a stripping layer, namely coating an acrylic acid ester colloid solution on the Al layer, then coating a polyurethane colloid solution on the acrylic acid ester colloid solution for forming a primer layer, and respectively forming a primer layer and a surface adhesive layer by the acrylic acid ester colloid and the polyurethane colloid after drying, wherein the coating weight of the primer layer on the Al layer is 0.1-0.15g/m 2, and the coating weight of the surface adhesive layer is 0.5-1.5g/m 2. Contacting and compounding one side of the sealing layer on the support composite layer and one side of the surface adhesive layer on the barrier layer, and forming a stripping layer between the barrier layer and the sealing layer after heat curing for 48 hours at 65+/-5 ℃;
The interlayer separation film is obtained by forming a stripping layer, wherein the average value of stripping strength between a blocking layer and a sealing layer is about 2.75N/15mm, and the stripping strength between a bottom film and the sealing layer is less than 0.1N/15mm, so that the bottom film is very easy to strip from the sealing layer, the interlayer separation film is obtained after the bottom film is removed, then embossing and die cutting are carried out on the interlayer separation film, and a die cutter is used for positioning the outline positioning line of the sealing layer film to finish die cutting, so that the sealing cover film is formed.
Example 6:
a method for producing an interlayer separation membrane, comprising:
the preparation method comprises the steps of obtaining a sealing layer with the thickness of 30 mu m and the material of CPP, obtaining a base film with the thickness of 30 mu m and the material of CPP, wherein the strength of the base film is 90-120MPa, the extensibility is 180% -200%, obtaining a blocking layer with the thickness of 35 mu m and the material of Al, obtaining an acrylic ester colloid solution and obtaining a polyurethane colloid solution;
forming a drinking opening, namely compounding the sealing layer with the bottom film to form a supporting composite layer, and cutting the supporting composite layer to form the drinking opening on the sealing layer;
And forming a stripping layer, namely coating an acrylic acid ester colloid solution on the Al layer, then coating a polyurethane colloid solution on the acrylic acid ester colloid solution for forming a primer layer, and respectively forming a primer layer and a surface adhesive layer by the acrylic acid ester colloid and the polyurethane colloid after drying, wherein the coating weight of the primer layer on the Al layer is 0.1-0.15g/m 2, and the coating weight of the surface adhesive layer is 0.5-1.5g/m 2. Contacting and compounding one side of the sealing layer on the support composite layer and one side of the surface adhesive layer on the barrier layer, and forming a stripping layer between the barrier layer and the sealing layer after heat curing for 48 hours at 65+/-5 ℃;
The interlayer separation film is obtained by forming a stripping layer, wherein the average value of stripping strength between a blocking layer and a sealing layer is about 2.83N/15mm, and the stripping strength between a bottom film and the sealing layer is less than 0.1N/15mm, so that the bottom film is very easy to strip from the sealing layer, the interlayer separation film is obtained after the bottom film is removed, then embossing and die cutting are carried out on the interlayer separation film, and a die cutter is used for positioning the outline positioning line of the sealing layer film to finish die cutting, so that the sealing cover film is formed.
Comparative example 1:
The comparative example is different from the example in that the base film is made of PE material with tensile strength and elongation outside the range values, and the specific process is as follows:
The preparation method comprises the steps of obtaining a sealing layer with the thickness of 50 mu m and the material of CPP, obtaining a base film with the thickness of 70 mu m and the material of PE and static electricity, wherein the tensile strength of the base film is 10-20MPa, the elongation is 530-570%, obtaining a blocking layer with the thickness of 50 mu m and the material of Al, obtaining an acrylic ester colloid solution and obtaining a polyurethane colloid solution;
forming a drinking opening, namely compounding the sealing layer with the bottom film to form a supporting composite layer, and cutting the supporting composite layer to form the drinking opening on the sealing layer;
And forming a stripping layer, namely coating an acrylic acid ester colloid solution on the Al layer, then coating the acrylic acid ester colloid solution for forming a primer layer by adopting a polyurethane colloid solution, drying, and respectively forming a primer layer and a surface adhesive layer by adopting the acrylic acid ester colloid and the polyurethane colloid, wherein the coating weight of the primer layer on the blocking layer is 0.1-0.15g/m 2, and the coating weight of the surface adhesive layer is 0.5-1.5g/m 2. Compounding the stripping layer with the barrier layer, and forming the stripping layer between the barrier layer and the sealing layer after heat curing for 48 hours at 65+/-5 ℃;
The interlayer separation film is obtained by forming a stripping layer, wherein the average value of stripping strength between a blocking layer and a sealing layer is about 2.77N/15mm, and the stripping strength between a bottom film and the sealing layer is less than 0.1N/15mm, so that the bottom film is very easy to strip from the sealing layer, the interlayer separation film is obtained after the bottom film is removed, then embossing and die cutting are carried out on the interlayer separation film, and a die cutter is used for positioning the outline positioning line of the sealing layer film to finish die cutting, so that the sealing cover film is formed.
Comparative example 2:
the comparison example is different from the embodiment in that the sealing layer is cut after the blocking layer is directly compounded with the sealing layer, and the specific process is as follows:
the preparation method comprises the steps of obtaining a sealing layer with the thickness of 80 mu m and the material of CPP, obtaining a blocking layer with the thickness of 50 mu m and the material of Al, obtaining an acrylic ester colloid solution and obtaining a polyurethane colloid solution;
And forming a stripping layer, namely coating an acrylic acid ester colloid solution on the blocking layer, then coating a polyurethane colloid solution on the acrylic acid ester colloid solution for forming a primer layer, and respectively forming a primer layer and a surface adhesive layer by the acrylic acid ester colloid and the polyurethane colloid after drying, wherein the coating weight of the primer layer on the blocking layer is 0.1-0.15g/m 2, and the coating weight of the surface adhesive layer is 0.5-1.5g/m 2. Contacting and compounding one side of a sealing layer of the support composite layer with one side of a surface adhesive layer on the barrier layer, and forming a stripping layer between the barrier layer and the sealing layer after heat curing for 48 hours at 65+/-5 ℃;
Forming a drinking hole, namely adjusting the depth of a lower cutter of a cutter roll die edge, cutting a positioning line at the break of the drinking hole and the edge of the cover film, and preparing the interlayer separation film after forming the drinking hole on the sealing layer;
And (3) obtaining the sealing cover film, namely embossing and die-cutting the interlayer separation film, and positioning the outline positioning line of the sealing cover film by a die cutter to finish die-cutting to form the sealing cover film.
Comparative example 3:
the comparison example is different from the embodiment in that the sealing layer is cut after the blocking layer is directly compounded with the sealing layer, and the specific process is as follows:
the preparation method comprises the steps of obtaining a sealing layer with the thickness of 50 mu m and the material of CPP, obtaining a blocking layer with the thickness of 80 mu m and the material of Al, obtaining an acrylic ester colloid solution and obtaining a polyurethane colloid solution;
And forming a stripping layer, namely coating an acrylic acid ester colloid solution on the blocking layer, then coating a polyurethane colloid solution on the acrylic acid ester colloid solution for forming a primer layer, and respectively forming a primer layer and a surface adhesive layer by the acrylic acid ester colloid and the polyurethane colloid after drying, wherein the coating weight of the primer layer on the blocking layer is 0.1-0.15g/m 2, and the coating weight of the surface adhesive layer is 0.5-1.5g/m 2. Contacting and compounding one side of a sealing layer of the support composite layer with one side of a surface adhesive layer on the barrier layer, and forming a stripping layer between the barrier layer and the sealing layer after heat curing for 48 hours at 65+/-5 ℃;
Forming a drinking hole, namely adjusting the depth of a lower cutter of a cutter roll die edge, cutting a positioning line at the break of the drinking hole and the edge of the cover film, and preparing the interlayer separation film after forming the drinking hole on the sealing layer;
And (3) obtaining the sealing cover film, namely embossing and die-cutting the interlayer separation film, and positioning the outline positioning line of the sealing cover film by a die cutter to finish die-cutting to form the sealing cover film.
Comparative example 4:
the comparison example is different from the embodiment in that the sealing layer is cut after the blocking layer is directly compounded with the sealing layer, and the specific process is as follows:
the preparation method comprises the steps of obtaining a sealing layer with the thickness of 50 mu m and the material of CPP, obtaining a blocking layer with the thickness of 50 mu m and the material of Al, obtaining an acrylic ester colloid solution and obtaining a polyurethane colloid solution;
And forming a stripping layer, namely coating an acrylic ester colloid solution for forming a primer layer on the blocking layer, coating the acrylic ester colloid solution for forming the primer layer on the polyurethane colloid solution, drying, and respectively forming a primer layer and a surface adhesive layer by using the acrylic ester colloid and the polyurethane colloid, wherein the coating weight of the primer layer on the blocking layer is 0.1-0.15g/m 2, and the coating weight of the surface adhesive layer is 0.5-1.5g/m 2. Contacting and compounding one side of a sealing layer of the support composite layer with one side of a surface adhesive layer on the barrier layer, and forming a stripping layer between the barrier layer and the sealing layer after heat curing for 48 hours at 65+/-5 ℃;
Forming a drinking hole, namely adjusting the depth of a lower cutter of a cutter roll die edge, cutting a positioning line at the break of the drinking hole and the edge of the cover film, and preparing the interlayer separation film after forming the drinking hole on the sealing layer;
And (3) obtaining the sealing cover film, namely embossing and die-cutting the interlayer separation film, and positioning the outline positioning line of the sealing cover film by a die cutter to finish die-cutting to form the sealing cover film.
Experimental example the performance of the support composite layers prepared in examples and comparative examples was tested, and the performance test items included hole cutting effect, curl effect, sealability effect, and easy-to-tear effect.
The method for detecting the hole cutting effect comprises the steps of randomly cutting a section, stripping to see whether the hole is completely cut, and if the hole is completely cut, the effect is good, and if the connection exists when the cut is not completely broken, the effect is poor.
The detection method of the curling effect comprises the steps of rolling the prepared interlayer separation film, checking the tightness of the scroll, ensuring that the scroll is tight and not loose, ensuring that the effect is good, ensuring that the scroll is loose, and ensuring that the effect is poor.
Specific results of the hole-cutting effect and the curling effect are shown in table 1 below.
TABLE 1
Cut Kong Xiaoguo Curling effect
Example 1 Good quality Good quality
Example 2 Good quality Good quality
Example 3 Good quality Good quality
Example 4 Good quality Good quality
Example 5 Good quality Good quality
Example 6 Good quality Good quality
Comparative example 1 Difference of difference Good quality
The sealing cover film prepared by the examples and the comparative examples and the PP cup are hot pressed for 1s at 240 ℃ and 0.5MPa, and the sealing property and the easy uncovering property of the cup are detected after hot pressing, wherein the detection condition of the sealing property is that whether the negative pressure is 50Kpa and 30s/60s is leaked or not. The peel-off easiness was measured by preparing a 15mm sample film and performing a 180℃peel test to measure the force applied during peeling, i.e., the peel strength in Table 2 below.
The results of the above-mentioned detection of sealability and releasability are shown in table 2 below.
TABLE 2
The sealing cover film without leakage and wiredrawing is a qualified finished product.
The above results show that only when a material with a compressive strength of 50MPa to 350MPa and an elongation of 90% -500% is used as a base film and is combined with a sealing layer to form a support composite layer, the support composite layer is formed with a drinking orifice, and finally, an interlayer separation film formed by combining a barrier layer can ensure the sealing performance and the easy uncovering performance.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.

Claims (10)

1. A method for producing an interlayer separation membrane, comprising:
the sealing layer and the bottom film are compounded to form a supporting composite layer, and the supporting composite layer is cut to form a drinking opening on the sealing layer, wherein the bottom film is made of a material with the tensile strength of 50-350 MPa and the elongation of 90-500%;
And compounding the sealing layer on the support composite layer with the blocking layer through colloid, curing the colloid between the blocking layer and the sealing layer to form a stripping layer, wherein the stripping strength between the bottom film and the sealing layer on the support composite layer is smaller than that between the blocking layer and the sealing layer, and removing the bottom film to form an interlayer separating film.
2. The method for producing an interlayer separating membrane according to claim 1, wherein the tensile strength of the base membrane is 150MPa to 200MPa and the elongation is 110% to 140%, and preferably the base membrane is made of CPP.
3. The method for producing an interlayer separating film according to claim 1 or 2, wherein the peel strength between the carrier film and the sealing layer on the support composite layer is less than 0.1N/15mm.
4. A method of producing an interlayer separating film according to any of claims 1 to 3, wherein the peel strength between the barrier layer and the sealing layer is greater than 1N/15mm, preferably 1 to 7N/15mm, more preferably 2 to 4N/15mm.
5. The method for producing an interlayer separating film according to any of claims 1 to 4, wherein the thickness of the base film is 30 to 70 μm.
6. The method according to any one of claims 1 to 5, wherein the peeling layer has two layers, namely a primer layer formed of an acrylic colloid and a topcoat layer formed of a polyurethane colloid, and the primer layer is disposed adjacent to the barrier layer.
7. The method according to claim 6, wherein the primer layer has a coating weight of 0.05-0.15g/m 2 and the topcoat layer has a coating weight of 0.3-4.5g/m 2.
8. The method for producing an interlayer separating film according to any one of claims 1 to 7, wherein the barrier layer is made of Al;
and/or, the material of the sealing layer is CPP.
9. The method for producing an interlayer separating film according to claim 8, wherein the thickness of the barrier layer is 35 to 70 μm;
And/or the thickness of the sealing layer is 30-70 microns.
10. The method for producing an interlayer separating film according to any of claims 1 to 9, wherein the peeling layer is formed at a curing temperature of 40 to 75 ℃ for a curing time of 48 to 72 hours, preferably 65±5 ℃ for 48 hours.
CN202310793094.1A 2023-06-30 2023-06-30 A method for preparing an interlayer separation membrane Pending CN119217787A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310793094.1A CN119217787A (en) 2023-06-30 2023-06-30 A method for preparing an interlayer separation membrane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310793094.1A CN119217787A (en) 2023-06-30 2023-06-30 A method for preparing an interlayer separation membrane

Publications (1)

Publication Number Publication Date
CN119217787A true CN119217787A (en) 2024-12-31

Family

ID=94047100

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310793094.1A Pending CN119217787A (en) 2023-06-30 2023-06-30 A method for preparing an interlayer separation membrane

Country Status (1)

Country Link
CN (1) CN119217787A (en)

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000177030A (en) * 1998-12-18 2000-06-27 Dainippon Printing Co Ltd Laminated body manufacturing method and package
CN1552608A (en) * 2003-12-18 2004-12-08 黄山永新股份有限公司 Thin-membrane for closing plastic container open
CN101278398A (en) * 2005-09-30 2008-10-01 株式会社半导体能源研究所 Method for manufacturing semiconductor device
CN101691158A (en) * 2009-10-21 2010-04-07 浙江金石包装有限公司 Sealing separation membrane and packaging container
CN101863337A (en) * 2010-06-29 2010-10-20 东莞市华源包装有限公司 Windowing aluminizing packaging bag and production technology thereof
CN202784216U (en) * 2012-06-11 2013-03-13 浙江金石包装有限公司 Aluminium foil sealing film
JP2013112363A (en) * 2011-11-28 2013-06-10 Dainippon Printing Co Ltd Blank material for paper container
CN205185436U (en) * 2015-11-27 2016-04-27 浙江长海包装集团有限公司 High resistant partition window epiphragma
CN110103555A (en) * 2019-05-08 2019-08-09 金石包装（嘉兴）有限公司 One kind taking off the strippable sealing epiphragma of lid
TWM593985U (en) * 2020-02-27 2020-04-21 鄭文其 Heat-sealed and easy-to-tear sippy cup film
CN212668107U (en) * 2020-03-02 2021-03-09 江阴市花园铝塑包装有限公司 Easy-to-open cover film
CN212979481U (en) * 2020-08-10 2021-04-16 江阴市品佳塑业有限公司 Easily tear PE membrane

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000177030A (en) * 1998-12-18 2000-06-27 Dainippon Printing Co Ltd Laminated body manufacturing method and package
CN1552608A (en) * 2003-12-18 2004-12-08 黄山永新股份有限公司 Thin-membrane for closing plastic container open
CN101278398A (en) * 2005-09-30 2008-10-01 株式会社半导体能源研究所 Method for manufacturing semiconductor device
CN101691158A (en) * 2009-10-21 2010-04-07 浙江金石包装有限公司 Sealing separation membrane and packaging container
CN101863337A (en) * 2010-06-29 2010-10-20 东莞市华源包装有限公司 Windowing aluminizing packaging bag and production technology thereof
JP2013112363A (en) * 2011-11-28 2013-06-10 Dainippon Printing Co Ltd Blank material for paper container
CN202784216U (en) * 2012-06-11 2013-03-13 浙江金石包装有限公司 Aluminium foil sealing film
CN205185436U (en) * 2015-11-27 2016-04-27 浙江长海包装集团有限公司 High resistant partition window epiphragma
CN110103555A (en) * 2019-05-08 2019-08-09 金石包装（嘉兴）有限公司 One kind taking off the strippable sealing epiphragma of lid
TWM593985U (en) * 2020-02-27 2020-04-21 鄭文其 Heat-sealed and easy-to-tear sippy cup film
CN212668107U (en) * 2020-03-02 2021-03-09 江阴市花园铝塑包装有限公司 Easy-to-open cover film
CN212979481U (en) * 2020-08-10 2021-04-16 江阴市品佳塑业有限公司 Easily tear PE membrane

Similar Documents

Publication Publication Date Title
CN108956450A (en) A kind of off-type force detection method of Ge Laxin silicone oil paper
JPWO2011111576A1 (en) Optical adhesive sheet
JPWO2011122288A1 (en) Surface protection film
JP6492179B2 (en) Surface protection film
CN111440555B (en) High-temperature-resistant and easy-to-peel CPP protective film and preparation method thereof
EP3202738A1 (en) Laminated glass intermediate film and laminated glass
US4020204A (en) Vinyl transfer sheet material and method for applying same to vinyl substrate
TW201619320A (en) Anisotropic adhesive sheet
CN119217787A (en) A method for preparing an interlayer separation membrane
JP2014189660A (en) Method for manufacturing laminate, adhesive roll and adhesive layer-containing laminated structure using laminate
CN108262941B (en) Soft-to-hard film pasting process and film pasting product
JP2024057587A (en) Sealant film for electrical storage device exterior material and electrical storage device exterior material using same
JP2013197194A (en) Dicing film and method of manufacturing semiconductor device
JP5394661B2 (en) Adhesive sheet
KR101968546B1 (en) The method for measuring the temporal stability of release film
JP6778562B2 (en) Adhesive sheet with release liner
CN108779372A (en) It include the optics organosilicon double faced adhesive tape of organic silicon substrate layer with low storage modulus
CN112592671A (en) Test paper bottom plate applied to in-vitro diagnostic reagent and preparation method thereof
CN113604167A (en) Non-silicon transfer protective film and preparation method thereof
JP2014189659A (en) Method for manufacturing laminate, adhesive roll and adhesive layer-containing laminated structure using laminate
CN205705626U (en) A kind of wafer cutting, thinning protecting film
EP3492543A1 (en) Pressure-sensitive adhesive sheet
CN112846534B (en) 3CCM cutting method
CN113105833B (en) Supporting type silica gel protective film and preparation method thereof
JP5659665B2 (en) Adhesion strength evaluation method

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination