CN110735360B - Production process of degradable paper bag - Google Patents
Production process of degradable paper bag Download PDFInfo
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- CN110735360B CN110735360B CN201910954329.4A CN201910954329A CN110735360B CN 110735360 B CN110735360 B CN 110735360B CN 201910954329 A CN201910954329 A CN 201910954329A CN 110735360 B CN110735360 B CN 110735360B
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- paper
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- waterproof
- paper bag
- packaging paper
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Wrappers (AREA)
Abstract
The invention relates to the technical field of packaging, and discloses a production process of a degradable paper bag, which relates to a paper bag main body, wherein the paper bag main body comprises packaging paper and a waterproof film, and the production process of the paper bag main body comprises the following steps: s1, uniformly coating the waterproof film on the surface of the packaging paper after the waterproof film is hot-melted by a coating machine to form a waterproof layer, and the waterproof layer is hot-melted on the surface of the packaging paper and is primarily bonded with the packaging paper; and S2, blowing hot air by using a hot air bag making machine to further bond the waterproof film with the packaging paper to obtain the waterproof paper bag. The invention has the following advantages and effects: the waterproof film is coated on the packaging paper by a film coating machine, so that the waterproof performance of the packaging paper can be improved, and the toughening film is compounded, thereby being beneficial to improving the toughness of the paper bag.
Description
Technical Field
The invention relates to the technical field of packaging, in particular to a production process of a degradable paper bag.
Background
The paper bag paper is similar to kraft paper, is mostly produced by softwood kraft pulp, and is also produced by mixing partial bamboo pulp, cotton stalk pulp and rag pulp in China, so the mechanical strength of the paper bag paper is very high; the common paper bag is used as daily article package in daily life, the paper bag is low in cost, and the paper is taken from the nature, is a recyclable, renewable and reusable material, does not cause environmental pollution, is favorable for environmental protection, and is applied more and more widely along with the improvement of environmental awareness.
At present, publication number is CN 209023410U's patent discloses a container bag, and its technical scheme's main points are including being bonded at the bottom of two level walls, two cockscomb structure lateral walls and cockscomb structure bags and forming, two the cockscomb structure lateral wall turns over the formation again after a plurality of equant foldings by a paper at the bottom of cockscomb structure lateral wall and the cockscomb structure bags, the turn-ups of cockscomb structure lateral wall bonds respectively two level on the wall.
However, the paper bag has no waterproof function, and is inconvenient for people in daily use, so that improvement is needed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a production process of a degradable paper bag, so that the paper bag has water resistance and is convenient for daily use of people.
In order to achieve the purpose, the invention provides the following technical scheme:
a production process of a degradable paper bag relates to a paper bag main body, the paper bag main body comprises packaging paper and a waterproof film, and the production process of the paper bag main body comprises the following steps:
s1, uniformly coating the waterproof film on the surface of the packaging paper after the waterproof film is hot-melted by a coating machine to form a waterproof layer, and the waterproof layer is hot-melted on the surface of the packaging paper and is primarily bonded with the packaging paper;
and S2, blowing hot air by using a hot air bag making machine to further bond the waterproof film with the packaging paper to obtain the waterproof paper bag.
Through adopting above-mentioned technical scheme, realize the coating of waterproof membrane with drenching the membrane machine on the wrapping paper to can improve the waterproof performance of wrapping paper, and also be favorable to improving the toughness of wrapping paper simultaneously, make the container bag main part be difficult to broken.
The invention is further configured to: the waterproof membrane is a PBS membrane.
By adopting the technical scheme, the PBS resin is also called polybutylene succinate resin and polybutylene succinate resin, is synthesized by condensation polymerization of succinic acid and butanediol, is easy to be decomposed and metabolized by various microorganisms or enzymes in animals and plants in the nature, and is finally decomposed into carbon dioxide and water, is a typical completely biodegradable polymer material, has good biocompatibility and biological absorbability, so that the waterproof film can be completely degraded, and the main body of the paper bag can be completely degraded.
The invention is further configured to: and a toughening film is compounded between the packaging paper and the waterproof film.
Through adopting above-mentioned technical scheme, the toughness of wrapping paper can be improved on the one hand to the membrane of toughening between wrapping paper and the waterproof membrane, and the combination effect of PBS membrane and toughening membrane is inseparabler than the combination between wrapping paper and the PBS membrane, consequently can further increase the bonding fastness of PBS membrane and wrapping paper.
The invention is further configured to: the toughening film comprises the following components in parts by weight:
60-80 parts of polyvinyl alcohol;
10-12 parts of hexamethylene diisocyanate;
1-2 parts of titanium tert-butoxide.
By adopting the technical scheme, the hexamethylene diisocyanate has a long carbon chain, and the tert-butyl titanium is used as a catalyst, so that the hexamethylene diisocyanate reacts with hydroxyl in polyvinyl alcohol, the molecular weight can be increased, the intermolecular acting force is increased, and when the material is broken under the action of stretching, a larger external tension action is required, so that the polyethylene film has higher toughness, the packaging paper has higher toughness, and the problem of low paper toughness of the existing paper bag paper is solved; the polyvinyl alcohol is degradable, and the environment-friendly performance of the paper bag is improved.
The invention is further configured to: the toughening membrane also comprises 2-3 parts of phthalic anhydride by weight.
By adopting the technical scheme, a benzene ring structure with larger steric hindrance can be introduced by adding phthalic anhydride, so that the interaction between molecular chains is increased, and the intrinsic viscosity of the system is increased; the introduction of phthalic anhydride can generate a synergistic effect with hexamethylene diisocyanate, and the phthalic anhydride can react with the hexamethylene diisocyanate to improve the reaction activity of the hexamethylene diisocyanate, so that the reaction product of the hexamethylene diisocyanate and polyvinyl alcohol can be increased, the molecular weight and intermolecular acting force can be increased, and the toughness of polyethylene can be further improved; on the other hand, phthalic anhydride may also act as a catalyst for the crosslinking reaction.
The invention is further configured to: the toughening membrane also comprises 0.1-0.2 part of catalyst according to the parts by weight.
By adopting the technical scheme, the catalyst promotes the reaction of phthalic anhydride and hexamethylene diisocyanate.
The invention is further configured to: the catalyst is zinc glutarate.
By adopting the technical scheme, the zinc glutarate is used as a catalyst for the reaction of phthalic anhydride and hexamethylene diisocyanate, and plays a role in promoting the reaction activity of the hexamethylene diisocyanate to be improved, so that the hexamethylene diisocyanate is more reacted with polyvinyl alcohol, a product with a large molecular weight is improved, the intermolecular force is further improved, and the aim of improving the toughness of the packaging paper is fulfilled.
The invention is further configured to: the toughening membrane also comprises 0.8-1 part of cross-linking agent in parts by weight.
Through adopting above-mentioned technical scheme, in the hot melt process, make the polyethylene membrane can with PBS membrane crosslinked through the cross-linking agent, can improve the bonding firmness of PBS membrane and wrapping paper on the one hand, on the other hand can increase the cross-linking nature between membrane and the membrane again, reaches toughened purpose then.
The invention is further configured to: the cross-linking agent is ethylenediamine in parts by weight.
By adopting the technical scheme, the ethylenediamine has the bifunctional group, easily causes the crosslinking between the PBS film and the modified polyvinyl alcohol film, improves the connection strength of the PBS film and the modified polyvinyl alcohol film, is favorable for improving the bonding stability between the PBS film and the packaging paper, and is also favorable for improving the toughness of the PBS film and further improving the tensile strength of the packaging paper.
The invention is further configured to: the toughening film is hot-melted, sprayed on the surface of the packaging paper and adhered to the packaging paper.
By adopting the technical scheme, the toughening film is coated on the surface of the packaging paper in a spraying manner, so that the toughening film is uniformly adhered to the packaging paper.
In conclusion, the invention has the following beneficial effects:
1. the waterproof PBS film is coated on the packaging paper by a film coating machine, the PBS film can be finally decomposed into carbon dioxide and water, and is a typical completely biodegradable polymer material, in addition, a toughening film is compounded between the packaging paper and the PBS film, so that the waterproof performance of the packaging paper is improved, the toughness of the packaging paper is also favorably improved, a paper bag main body is not easy to break, the packaging paper, the PBS film and polyvinyl alcohol can be degraded, the degradability of the paper bag main body is favorably realized, and the environmental protection performance is improved;
2. the hexamethylene diisocyanate has a long carbon chain, and tert-butyl titanium is used as a catalyst to react with hydroxyl in the hexamethylene diisocyanate and polyvinyl alcohol, so that the molecular weight can be increased, the intermolecular acting force is increased, and when the material is broken under the action of stretching, a larger external tension action is required, so that the polyethylene film has higher toughness, the packaging paper has higher toughness, and the problem that the paper toughness of the existing paper bag paper is not high is solved; the polyvinyl alcohol is degradable, so that the environmental protection performance of the paper bag is improved;
3. phthalic anhydride is added to introduce a benzene ring structure with larger steric hindrance, so that the interaction between molecular chains is increased, and the intrinsic viscosity of the system is increased; under the catalytic action of a catalyst 4-dimethylaminopyridine, hexamethylene diisocyanate can react with phthalic anhydride to generate a synergistic effect, so that the reaction activity of the hexamethylene diisocyanate is improved, the reaction product of the hexamethylene diisocyanate and polyvinyl alcohol is increased, the molecular weight and intermolecular acting force are increased, and the toughness of polyethylene is improved; on the other hand, phthalic anhydride may also act as a catalyst for the crosslinking reaction;
4. the ethylenediamine with bifunctional groups easily causes the crosslinking between the PBS film and the modified polyvinyl alcohol film, improves the connection strength of the PBS film and the modified polyvinyl alcohol film, is favorable for improving the bonding stability between the PBS film and the packaging paper, and is also favorable for improving the toughness of the PBS film and further improving the tensile strength of the packaging paper.
Detailed Description
The source of the packaging paper and PBS adopted by the invention is as follows:
wrapping paper, available from Nippon Zhongshiwo pulp industry Co., Ltd;
PBS, available from the Company PTT MCC Biochem Company Limited.
Example 1
A production process of a degradable paper bag comprises the following steps:
s1, weighing the components in required parts by weight, primarily mixing 60 parts of polyvinyl alcohol, 10 parts of hexamethylene diisocyanate and 1 part of tert-butyl titanium, adding 2 parts of phthalic anhydride and 0.1 part of 4-dimethylaminopyridine, further mixing, finally adding 0.8 part of ethylenediamine, stirring and uniformly mixing to prepare a toughening membrane for later use; the contents of the components are shown in the following table 1;
s2, uniformly coating and coating the toughened film of S1 on the surface of packaging paper after the toughened film is hot-melted by a film coating machine, and hot-melting the toughened film on the surface of the packaging paper and bonding the toughened film with the packaging paper;
s3, uniformly spraying and coating 65 parts of PBS on the toughening film after hot melting by using a film spraying machine to form a waterproof layer, and combining the waterproof layer with the toughening film under the hot melting condition and adhering the waterproof layer to packaging paper;
and S4, blowing hot air with the temperature of 75 ℃ by using a hot air bag making machine to further bond the waterproof film with the packaging paper to obtain the waterproof paper bag.
Example 2
A production process of a degradable paper bag comprises the following steps:
s1, weighing the components in required parts by weight, preliminarily mixing 80 parts of polyvinyl alcohol, 12 parts of hexamethylene diisocyanate and 1-2 parts of tert-butyl titanium, adding 3 parts of phthalic anhydride and 0.2 part of 4-dimethylaminopyridine, further mixing, finally adding 1 part of ethylenediamine, stirring and uniformly mixing to prepare a toughening membrane for later use; the contents of the components are shown in the following table 1;
s2, uniformly coating and coating the toughened film of S1 on the surface of packaging paper after the toughened film is hot-melted by a film coating machine, and hot-melting the toughened film on the surface of the packaging paper and bonding the toughened film with the packaging paper;
s3, uniformly spraying and coating 85 parts of PBS on the toughening film after hot melting by using a film spraying machine to form a waterproof layer, and combining the waterproof layer with the toughening film under the hot melting condition and adhering the waterproof layer to packaging paper;
and S4, blowing hot air with the temperature of 75 ℃ by using a hot air bag making machine to further bond the waterproof film with the packaging paper to obtain the waterproof paper bag.
Comparative example 1
The difference from example 1 is that no PBS film was compounded.
Comparative example 2
The difference from example 1 is that hexamethylene diisocyanate was not added; the contents of the components are shown in table 1 below.
Comparative example 3
The difference from example 1 is that hexamethylene diisocyanate was replaced by polycarbonate; the contents of the components are shown in table 1 below.
Comparative example 4
The difference from example 1 is that phthalic anhydride was not added and the content of each component is shown in table 1 below.
Comparative example 5
The difference from example 1 is that phthalic anhydride and zinc glutarate were not added and the contents of the respective components are shown in table 1 below.
Comparative example 6
The difference from example 1 is that ethylenediamine was replaced with glutaraldehyde and the contents of the components are shown in table 1 below.
The wrapping paper compounded with the PBS film of the example 1 and the wrapping paper not compounded with the PBS film of the comparative example 1 are respectively subjected to water containing tests under the same other conditions, and the measured results show that the wrapping paper of the comparative example 1 has strong water permeability, while the wrapping paper of the example 1 is completely impermeable; the packaging paper has better waterproof performance after being compounded with the PBS film.
The tensile strength refers to the tensile force borne by a test sample with a certain width when the test sample is broken, and is expressed by kN/m, and the higher the tensile strength is, the stronger the toughness of the paper bag is; the invention adopts 80g/m2The wrapping paper of (1) was used as a paper sample, and the performance test was performed under standard laboratory conditions (temperature 23 ℃. + -. 1 ℃ C., relative humidity 50%. + -. 2%) using a tensile strength tester, and the test results are shown in Table 2 below.
TABLE 1 ingredient content Table for each example and comparative example
TABLE 2 tensile Strength test results of examples 1-2 and comparative examples 2-6
From the test results of table 2 above, the following conclusions can be drawn:
1. as can be seen from the comparison between example 1 and comparative examples 2 and 3, the toughness of the polyvinyl alcohol can be improved by adding hexamethylene diisocyanate, and the addition of hexamethylene diisocyanate has a better reinforcing effect on the toughness of the polyvinyl alcohol than polycarbonate; 2. as can be seen from the comparison between example 1 and comparative examples 4 and 5, the addition of phthalic anhydride can improve the toughness of the polyvinyl alcohol, and the phthalic anhydride and the zinc glutarate have a synergistic effect and have a better reinforcing effect on the toughness of the polyvinyl alcohol;
3. from the comparison of example 1 and comparative example 6, it can be seen that the addition of ethylenediamine has a better reinforcing effect on the toughness of polyvinyl alcohol than glutaraldehyde.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (6)
1. A production process of a degradable paper bag relates to a paper bag main body, and is characterized in that: the paper bag main body comprises packaging paper and a waterproof film, and the production process of the paper bag main body comprises the following steps:
s1, uniformly coating the waterproof film on the surface of the packaging paper after the waterproof film is hot-melted by a coating machine to form a waterproof layer, and the waterproof layer is hot-melted on the surface of the packaging paper and is primarily bonded with the packaging paper;
s2, blowing hot air by a hot air bag making machine to further bond the waterproof film with the packaging paper to obtain a waterproof paper bag;
the waterproof membrane is a PBS membrane;
a toughening film is compounded between the packaging paper and the waterproof film;
the toughening film comprises the following components in parts by weight:
60-80 parts of polyvinyl alcohol;
10-12 parts of hexamethylene diisocyanate;
1-2 parts of titanium tert-butoxide;
2-3 parts of phthalic anhydride.
2. The process for producing the degradable paper bag according to claim 1, wherein: the toughening membrane also comprises 0.1-0.2 part of catalyst according to the parts by weight.
3. The process for producing a degradable paper bag according to claim 2, wherein: the catalyst is zinc glutarate.
4. The process for producing the degradable paper bag according to claim 1, wherein: the toughening membrane also comprises 0.8-1 part of cross-linking agent in parts by weight.
5. The process for producing the degradable paper bag according to claim 4, wherein: the cross-linking agent is ethylenediamine in parts by weight.
6. The process for producing the degradable paper bag according to claim 1, wherein: the toughening film is hot-melted, sprayed on the surface of the packaging paper and adhered to the packaging paper.
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| CN109098037B (en) * | 2018-08-24 | 2021-03-23 | 岸宝环保科技有限公司 | Composite BioPBS resin for laminating and process for preparing laminating paper |
| CN112359602A (en) * | 2020-10-31 | 2021-02-12 | 梁露榕 | Waterproof antibacterial non-woven fabric and preparation method thereof |
| CN112482036A (en) * | 2020-11-23 | 2021-03-12 | 东尚服装股份有限公司 | Processing technology of bottom fly |
| CN112900149B (en) * | 2021-01-16 | 2022-07-12 | 北京金印联国际供应链管理有限公司 | White cardboard for food packaging and production process thereof |
| CN113183495A (en) * | 2021-04-13 | 2021-07-30 | 上海国璨环境科技有限公司 | Preparation process of biodegradable garbage bag |
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| CA2128102C (en) * | 1992-01-21 | 2002-04-09 | James A. Goettmann | Recyclable polymeric synthetic paper and method for its manufacture |
| JP3244140B2 (en) * | 1992-10-15 | 2002-01-07 | 星光化学工業株式会社 | Surface treatment method for paperboard |
| CN2803957Y (en) * | 2005-04-25 | 2006-08-09 | 张锦明 | Paper bag |
| JP5697955B2 (en) * | 2010-11-19 | 2015-04-08 | 住化バイエルウレタン株式会社 | Multilayer decorative film |
| CN201929212U (en) * | 2010-12-27 | 2011-08-17 | 袁健 | Environment-friendly easy-to-use paper bag |
| CN102852051B (en) * | 2011-06-29 | 2015-09-09 | 昆山福泰涂布科技有限公司 | Novel structural laminating paper |
| CN102558797B (en) * | 2012-01-13 | 2013-11-06 | 深圳市光华伟业实业有限公司 | Biodegradable PE-coated paper material and preparation method thereof |
| CN202864026U (en) * | 2012-11-09 | 2013-04-10 | 陈梅 | Waterproof package paper |
| CN103469678A (en) * | 2013-09-11 | 2013-12-25 | 北京化工大学常州先进材料研究院 | Preparation method of recyclable coated paper |
| CN105690870A (en) * | 2015-07-03 | 2016-06-22 | 怀宁县宝友工贸有限公司 | Degradable waterproof paper bag |
| CN205219971U (en) * | 2015-11-30 | 2016-05-11 | 青岛榕信工贸有限公司 | Thermal -insulated food package of degradable drenches membrane paper |
| CN205313920U (en) * | 2015-11-30 | 2016-06-15 | 青岛榕信工贸有限公司 | Environmental protection paper cup drenches membrane paper |
| CN108914686A (en) * | 2018-07-16 | 2018-11-30 | 福建益百利包装材料有限公司 | A kind of leaching membrane paper and its production technology |
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