CN114228254B - Manufacturing method of high-concentration alcohol-resistant composite bag - Google Patents
Manufacturing method of high-concentration alcohol-resistant composite bag Download PDFInfo
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- CN114228254B CN114228254B CN202210062958.8A CN202210062958A CN114228254B CN 114228254 B CN114228254 B CN 114228254B CN 202210062958 A CN202210062958 A CN 202210062958A CN 114228254 B CN114228254 B CN 114228254B
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- film
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- ptfe
- manufacturing
- ptfe film
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- 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
- B31B70/20—Cutting sheets or blanks
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- 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
- B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
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- 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
- B31B70/74—Auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
- B29K2027/18—PTFE, i.e. polytetrafluorethene, e.g. ePTFE, i.e. expanded polytetrafluorethene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2077/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention is applicable to the technical field of composite bag manufacturing, and provides a manufacturing method of a high-concentration alcohol-resistant composite bag, which mainly comprises the following steps: the modified PTFE film is adopted as an intermediate film, so that the composite bag has the characteristics of acid resistance, alkali resistance and organic solvent resistance, the exudation of high-concentration alcohol can be effectively prevented, the surface property of the modified PTFE film is enhanced compared with that of the PTFE film, and the adhesive property is better when the modified PTFE film is compounded with an outer film and an inner film; in addition, through adopting POE modified CPP film as the inner membrance, compare with pure CPP film adhesion strength and increase to some extent, can effectively prevent that compound bag from appearing layering because of the infiltration of alcohol, can keep compound bag's integrality, effectively prolong compound bag's life.
Description
Technical Field
The invention belongs to the technical field of composite bags, and particularly relates to a manufacturing method of a high-concentration alcohol-resistant composite bag.
Background
The plastic composite film is used as a food packaging material widely used at present, is formed by compounding different plastic layers, has higher barrier property, is suitable for packaging of most foods, but when the content is alcohol with concentration of more than 75%, alcohol in the composite bag slowly permeates and volatilizes from inside to outside, so that the composite bag has the bubble layering phenomenon, the service life of the bag is influenced, meanwhile, the alcohol is used as a flammable micro-strip-stimulated liquid, and the permeated alcohol can bring unpleasant smell to people and generate potential safety hazards to the surrounding environment.
Disclosure of Invention
The invention aims to provide a manufacturing method of a high-concentration alcohol-resistant composite bag, and aims to solve the problems that when the content of the composite bag is high-concentration alcohol, the composite bag is easy to be damaged due to delamination caused by outward permeation and volatilization, and potential safety hazards are generated to the surrounding environment.
The invention provides a manufacturing method of a high-concentration alcohol resistant composite bag, which comprises the following steps:
preparing a modified PTFE film: PTFE, a nonpolar agent and a lubricant are mixed according to the mass ratio of (80% -85%): (10% -15%): (2% -4%) uniformly mixing, sequentially blending and casting the mixture to obtain a PTFE film, and carrying out surface modification on the PTFE film by adopting low-temperature radio-frequency plasma to obtain a modified PTFE film;
compounding: taking a BOPA film as an outer film, taking the modified PTFE film as an intermediate film, taking a POE modified CPP film as an inner film, sequentially arranging the outer film, the intermediate film and the inner film up and down, adding a high-viscosity adhesive and a solvent between film layers, and then carrying out five times of hot melt compounding in a constant temperature oven to form a BOPA/modified PTFE/modified CPP semi-finished product;
curing and molding: placing the BOPA/modified PTFE/modified CPP semi-finished product into a curing chamber for curing for 48 hours to form a composite film;
and (3) assembling and filling the mouth and forming: HDPE material is selected, and the filling opening is assembled through injection molding of an injection molding machine;
heat sealing, namely, contraposition forming the composite film in a bag making machine, heating and heat sealing the composite film by a heat sealing knife die, and heat sealing the assembly filling opening according to requirements;
and (3) bag making, namely cutting the composite film after bag making and heat sealing into a composite bag to obtain a finished product.
Further, the specific steps of using low-temperature radio frequency plasma to carry out surface modification on the PTFE film in the step of manufacturing the modified PTFE film include the following steps:
cleaning the PTFE film and cutting the PTFE film into a preset size;
placing the PTFE film after cutting treatment into a reaction cavity of plasma equipment, setting the distance between polar plates to be 5cm, adjusting the air pressure in the reaction cavity to be less than 2.5Pa, and introducing N 2 And H 2 ；
And after the air pressure in the reaction cavity is stable, discharging the PTFE film, wherein the discharge power is 300W, the discharge time is 6min, and the modified PTFE film is obtained after the discharge is finished.
Further, in the process of introducing N 2 And H 2 When N 2 And H 2 The flow rate of both gases during mixing was 40ml/min.
Further, in the step of manufacturing the modified PTFE film, the nonpolar agent and the lubricant are polypropylene and silicone oil, respectively.
Further, in the step of compounding, the temperature of the five times of hot melt compounding is sequentially 50 ℃, 60 ℃, 70 ℃, 75 ℃ and 80 ℃.
Further, in the step of curing molding, the temperature in the curing chamber is constant at 55 ℃.
Further, in the step of heat-sealing, the heat-sealing temperature is 180℃to 200 ℃.
Further, prior to step compounding, printing a pattern on the BOPA film by a printer is also included.
The invention has the beneficial effects that: the invention provides a manufacturing method of a high-concentration alcohol-resistant composite bag, which adopts a modified PTFE film as an intermediate film, so that the composite bag has the characteristics of acid resistance, alkali resistance and organic solvent resistance, can effectively prevent the exudation of high-concentration alcohol, and has better cohesiveness when being compounded with an outer film and an inner film, and the surface property of the modified PTFE film is enhanced compared with that of the PTFE film; in addition, by adopting the POE modified CPP film as an inner film, the adhesive strength is increased compared with that of a pure CPP film, and the composite bag can be effectively prevented from layering due to permeation of alcohol.
Drawings
Fig. 1 is a flowchart of a method for manufacturing a high-concentration-resistant alcohol composite bag according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The following describes in detail the implementation of the present invention in connection with specific embodiments:
examples:
polytetrafluoroethylene (PTFE) has excellent chemical properties, acid resistance, alkali resistance, organic solvent resistance, and the like, and has the characteristics of insolubility, non-swelling, non-moisture absorption, and the like in any solvent, thereby being widely applied to the fields of electric appliances, chemical industry, aviation, aerospace, machinery, biomedicine, and the like. However, polytetrafluoroethylene (PTFE) also has the disadvantages of low surface energy, poor adhesion performance, and the like, which limits its application in adhesion, printing and dyeing, packaging materials, and the like, so that when the invention is applied, the corresponding surface modification technology is performed on Polytetrafluoroethylene (PTFE).
The CPP film has low adhesive force, so that the application of the CPP film in plastic flexible packages is limited, the POE resin is added into the raw material resin of the cast polypropylene film (CPP film), the POE film is modified, the adhesive strength of the CPP film is doubled compared with that of the CPP film before modification, the packaging bag is effectively prevented from layering due to penetration of alcohol, and in addition, the heat sealing temperature of the packaging bag can be obviously reduced by adding the CPP film modified by the POE resin.
The BOPA film is biaxially oriented nylon, has the advantages of good puncture resistance, impact strength friction strength, bending strength, good printing effect, high barrier property and the like, and is widely applied to the packaging industry.
The embodiment of the invention provides a manufacturing method of a high-concentration alcohol resistant composite bag, which is shown in figure 1 and comprises the following steps:
step S1, manufacturing a modified PTFE film:
PTFE, a nonpolar agent and a lubricant are mixed according to the mass ratio of (80% -85%): (10% -15%): (2% -4%) and carrying out blending and casting on the mixture in sequence to obtain a PTFE film, and carrying out surface modification on the PTFE film by adopting low-temperature radio frequency plasma to obtain a modified PTFE film;
step S2, compounding:
taking a BOPA film as an outer film, taking a modified PTFE film as an intermediate film, taking a POE modified CPP film as an inner film, sequentially arranging the outer film, the intermediate film and the inner film up and down, adding a high-viscosity adhesive and a solvent between film layers, and then carrying out five times of hot melt compounding in a constant temperature oven to form a BOPA/modified PTFE/modified CPP semi-finished product;
step S3, curing and molding:
placing the BOPA/modified PTFE/modified CPP semi-finished product into a curing chamber for curing for 48 hours to form a composite film;
s4, assembling and filling port forming:
HDPE material is selected, and the filling opening is assembled through injection molding of an injection molding machine;
step S5, heat sealing:
the composite film is aligned and formed in a bag making machine, heated and heat-sealed by a heat sealing knife die, and an assembly filling port is heat-sealed according to requirements;
s6, bag making:
and cutting the composite film after bag making and heat sealing into a composite bag to obtain a finished product.
Further, the specific step of surface modification of the PTFE membrane with the low temperature rf plasma in step S1 includes:
step S101, cleaning a PTFE film and cutting the PTFE film into a preset size;
step S102, placing the PTFE film after cutting treatment in a reaction cavity of plasma equipment, setting the distance between polar plates to be 5cm, adjusting the air pressure in the reaction cavity to be less than 2.5Pa, and introducing N 2 And H 2 ；
And step S103, after the air pressure in the reaction cavity is stable, discharging the PTFE film, wherein the discharge power is 300W, the discharge time is 6min, and the modified PTFE film is obtained after the discharge is finished.
Further, in the process of introducing N 2 And H 2 When N 2 And H 2 The flow rate of both gases during mixing was 40ml/min.
Further, in step S1, the nonpolar agent and the lubricant are polypropylene and silicone oil, respectively.
Further, in step S2, the temperature of the five hot melt composites was sequentially 50 ℃, 60 ℃, 70 ℃, 75 ℃ and 80 ℃.
Further, in step S3, the temperature in the curing chamber is constant at 55 ℃.
Further, in step S5, the heat-sealing temperature is 180 ℃ to 200 ℃.
Further, before step S2, printing a pattern on the BOPA film by a printer is also included.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (8)
1. The manufacturing method of the high-concentration alcohol resistant composite bag is characterized by comprising the following steps of:
preparing a modified PTFE film: PTFE, a nonpolar agent and a lubricant are mixed according to the mass ratio of (80% -85%): (10% -15%): uniformly mixing (2% -4%), wherein the mass ratio of PTFE, a nonpolar agent and a lubricant is 100%, sequentially blending and casting the mixture to obtain a PTFE film, and carrying out surface modification on the PTFE film by adopting low-temperature radio-frequency plasma to obtain a modified PTFE film;
compounding: taking a BOPA film as an outer film, taking the modified PTFE film as an intermediate film, taking a POE modified CPP film as an inner film, sequentially arranging the outer film, the intermediate film and the inner film up and down, adding a high-viscosity adhesive and a solvent between film layers, and then carrying out five times of hot melt compounding in a constant temperature oven to form a BOPA/modified PTFE/modified CPP semi-finished product;
curing and molding: placing the BOPA/modified PTFE/modified CPP semi-finished product into a curing chamber for curing for 48 hours to form a composite film;
and (3) assembling and filling the mouth and forming: HDPE material is selected, and the filling opening is assembled through injection molding of an injection molding machine;
heat sealing, namely, contraposition forming the composite film in a bag making machine, heating and heat sealing the composite film by a heat sealing knife die, and heat sealing the assembly filling opening according to requirements;
and (3) bag making, namely cutting the composite film after bag making and heat sealing into a composite bag to obtain a finished product.
2. The method for manufacturing the high-concentration alcohol resistant composite bag according to claim 1, wherein the specific step of performing surface modification on the PTFE film by using low-temperature radio-frequency plasma in the step of manufacturing the modified PTFE film comprises the following steps:
cleaning the PTFE film and cutting the PTFE film into a preset size;
placing the PTFE film after cutting treatment into a reaction cavity of plasma equipment, setting the distance between polar plates to be 5cm, adjusting the air pressure in the reaction cavity to be less than 2.5Pa, and introducing N 2 And H 2 ；
And after the air pressure in the reaction cavity is stable, discharging the PTFE film, wherein the discharge power is 300W, the discharge time is 6min, and the modified PTFE film is obtained after the discharge is finished.
3. The method for manufacturing a high-concentration-resistant alcohol composite bag according to claim 2, wherein the method comprises the steps of introducing N 2 And H 2 When N 2 And H 2 The flow rate of both gases during mixing was 40ml/min.
4. The method of manufacturing a high concentration alcohol resistant composite bag according to claim 1, wherein in the step of manufacturing a modified PTFE film, the nonpolar agent and the lubricant are polypropylene and silicone oil, respectively.
5. The method for manufacturing the high-concentration-resistant alcohol composite bag according to claim 1, wherein in the step of compositing, the temperature of the five times of hot melt compositing is 50 ℃, 60 ℃, 70 ℃, 75 ℃ and 80 ℃ in order.
6. The method for producing a high-concentration alcohol resistant composite bag according to claim 1, wherein in the step of curing and molding, the temperature in the curing chamber is constant at 55 ℃.
7. The method of producing a high concentration alcohol resistant composite bag according to claim 1, wherein in the step of heat-sealing, the heat-sealing temperature is 180 ℃ to 200 ℃.
8. The method of making a high concentration alcohol resistant composite bag according to any one of claims 1-7, further comprising printing a pattern on said BOPA film by a printer prior to step compounding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210062958.8A CN114228254B (en) | 2022-01-20 | 2022-01-20 | Manufacturing method of high-concentration alcohol-resistant composite bag |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210062958.8A CN114228254B (en) | 2022-01-20 | 2022-01-20 | Manufacturing method of high-concentration alcohol-resistant composite bag |
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| CN114228254B true CN114228254B (en) | 2023-08-01 |
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004339344A (en) * | 2003-05-15 | 2004-12-02 | Nitto Denko Corp | Method for producing modified polytetrafluoroethylene film |
| CN102468352A (en) * | 2010-11-01 | 2012-05-23 | 武汉美格能源科技有限公司 | High-barrier flexible back film |
| JP5873389B2 (en) * | 2012-05-16 | 2016-03-01 | 住友電工ファインポリマー株式会社 | Method for producing modified polytetrafluoroethylene microporous membrane |
| JP6162410B2 (en) * | 2013-01-28 | 2017-07-12 | ユニチカ株式会社 | LAMINATE FOR PACKAGING MATERIAL, PROCESS FOR PRODUCING THE SAME AND PACKAGING MATERIAL |
| US10213950B2 (en) * | 2014-11-12 | 2019-02-26 | Hp Indigo B.V. | Flexible packaging material |
| CN106275764A (en) * | 2015-05-13 | 2017-01-04 | 湖南恒泰包装有限公司 | A kind of production technology of complex pocket |
| JP2019217750A (en) * | 2018-06-22 | 2019-12-26 | 大日本印刷株式会社 | Carbon dioxide-absorbing sealant film, laminate and packaging bag |
| JP7213047B2 (en) * | 2018-09-25 | 2023-01-26 | 藤森工業株式会社 | Manufacturing method of packaging material laminate, packaging material laminate and package using the same |
| CN111409341B (en) * | 2020-02-21 | 2022-12-23 | 杭州路先非织造股份有限公司 | Medical mask material based on spunlace nonwoven material and preparation method thereof |
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Inventor after: Tan Songjie Inventor after: Yan Chengcheng Inventor after: You Pinfang Inventor after: Feng Jinsong Inventor before: Tan Songjie Inventor before: Yan Chengcheng Inventor before: You Binfang Inventor before: You Jinsong |
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