CN112679893A - High-strength normal-temperature insoluble PVA shopping bag - Google Patents
High-strength normal-temperature insoluble PVA shopping bag Download PDFInfo
- Publication number
- CN112679893A CN112679893A CN202011328470.2A CN202011328470A CN112679893A CN 112679893 A CN112679893 A CN 112679893A CN 202011328470 A CN202011328470 A CN 202011328470A CN 112679893 A CN112679893 A CN 112679893A
- Authority
- CN
- China
- Prior art keywords
- pva
- shopping bag
- temperature
- strength
- bag according
- 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.)
- Granted
Links
Abstract
The invention relates to the technical field of environment-friendly shopping bags, in particular to a high-strength normal-temperature insoluble PVA shopping bag. The conventional PVA shopping bag has poor normal-temperature water resistance and cannot be subjected to rapid hydrolysis treatment after being used. Based on the problems, the invention provides the high-strength normal-temperature insoluble PVA shopping bag, 1,2, 7-heptatriol is used as the plasticizer to replace the traditional glycerol or glycol, the prepared PVA shopping bag has better water resistance and mechanical property at normal temperature, can be quickly hydrolyzed in an aqueous solution at the temperature of more than 50 ℃, the environment-friendly property of the shopping bag is ensured, and the high-strength normal-temperature insoluble PVA shopping bag has good development prospect.
Description
Technical Field
The invention relates to the technical field of environment-friendly shopping bags, in particular to a high-strength normal-temperature insoluble PVA shopping bag.
Background
Polyvinyl alcohol (PVA) is a biodegradable material, and the propagation of some bacteria or fungi in the nature can cause the structural destruction, so that the bacteria or fungi are split or oxidized, and the final degraded products are water and carbon dioxide, so that the PVA is zero in pollution, is cheap and easy to obtain, and is considered to be one of the most promising biodegradable materials.
Molecular chains of PVA contain a large amount of hydroxyl groups, and a large amount of hydrogen bonds are formed in the molecular chains and among the molecular chains, so that the melting point of the PVA is close to the decomposition temperature of the PVA, and the PVA is difficult to carry out thermoplastic processing, which limits the development and application of the PVA to a great extent.
The plasticizer commonly used for PVA films is glycerol or ethylene glycol, and researches show that the PVA film products prepared by using the glycerol or the ethylene glycol as the plasticizer have poor water resistance at normal temperature, for example, Chinese invention patent CN 106380765A discloses a water-soluble shopping bag, and the obtained shopping bag can be quickly dissolved in cold water at normal temperature, and the dissolving time is not more than 10 min. Chinese patent CN 103059486A discloses a method for manufacturing a water-resistant polyvinyl alcohol film, which adds toxic and irritant polyaldehyde water-resistant agent in a PVA matrix to react with hydroxyl on a polyvinyl alcohol molecular chain, so as to reduce the density of the hydroxyl in the polyvinyl alcohol, thereby achieving the purpose of reducing the water solubility of the PVA.
When the PVA film is used as a packaging material, for example, a supermarket shopping bag. In order to meet the requirement of sustainable development of modern green color, when a customer purchases fresh products (such as live fish), the shopping bag is required to have certain mechanical strength, and also has the characteristics of good normal temperature water resistance and easy rapid hydrolysis treatment after use.
Disclosure of Invention
Aiming at the problems in the prior art, the technical problems to be solved by the invention are as follows: the conventional PVA shopping bag has poor normal-temperature water resistance and cannot be subjected to rapid hydrolysis treatment after being used.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention provides a high-strength normal-temperature insoluble PVA shopping bag which comprises the following components in parts by weight:
specifically, the PVA has a median degree of polymerization of 1800-2500 and a degree of alcoholysis of 88-99%.
Specifically, the smooth opening agent is alkyl fatty acid, alkyl fatty acid salt or alkyl fatty amide.
In particular, the alkyl fatty acid is stearic acid.
Specifically, the alkyl fatty acid salt is sodium stearate or potassium stearate.
In particular, the alkyl fatty amide is stearamide, oleamide or erucamide.
Specifically, the anti-sticking agent is talcum powder, light calcium carbonate, white carbon black or titanium dioxide with 5000-.
Specifically, the high-strength normal-temperature insoluble PVA shopping bag is prepared according to the following steps:
(1) putting PVA into a high-speed stirrer, stirring and heating to 70-80 ℃, and slowly adding 1,2, 7-heptatriol;
(2) stirring at low speed for 50-120 min, and controlling the temperature at 80-100 deg.C until PVA fully absorbs 1,2, 7-heptatriol;
(3) adding smooth opening agent and anti-sticking agent, and mixing;
(4) and extruding and granulating the uniformly mixed materials by a double-screw extruder, blow-molding to form a film by a thermoplastic extrusion film blowing machine, and finally preparing the PVA shopping bags of various types and specifications by a bag making machine.
Specifically, the temperature of the extrusion granulation is as follows: 120 ℃/140 ℃/150 ℃/160 ℃/170 ℃/180 ℃/180 ℃/180 ℃/180 ℃.
Specifically, the temperature for blow molding the film is as follows: 140 ℃/160 ℃/180 ℃/185 ℃/185 ℃/180 ℃.
The invention has the beneficial effects that:
(1) the PVA shopping bag obtained by using 1,2, 7-heptatriol as a plasticizer to replace the traditional glycerin or glycol has better water resistance and mechanical property at normal temperature;
(2) the PVA packaging bag prepared by the invention can be quickly hydrolyzed in aqueous solution with the temperature of more than 50 ℃, thereby ensuring the green environmental protection property of the shopping bag.
Detailed Description
The present invention will now be described in further detail with reference to examples.
The PVA used in the following examples and comparative examples of the present invention had a median degree of polymerization of 1800-2500 and a degree of alcoholysis of 88% to 99%.
The slip opening agents used in the following examples and comparative examples of the present invention were alkyl fatty acids, alkyl fatty acid salts, or alkyl fatty amides.
The alkyl fatty acid used in the following examples and comparative examples of the present invention was stearic acid.
The alkyl fatty acid salt used in the following examples and comparative examples of the present invention was sodium stearate or potassium stearate.
The alkyl fatty amides used in the following examples and comparative examples of the invention are stearamide, oleamide or erucamide.
The anti-sticking agents used in the following examples and comparative examples of the present invention are 5000-.
Example 1
(1) Putting 100 parts by weight of PVA into a high-speed stirrer, stirring and heating to 70 ℃, and slowly adding 8 parts by weight of 1,2, 7-heptatriol;
(2) stirring at low speed for 120min, and controlling the temperature at 80 deg.C until PVA fully absorbs 1,2, 7-heptatriol;
(3) adding 0.1 part by weight of smooth opening agent and 1 part by weight of anti-sticking agent and uniformly mixing;
(4) extruding and granulating the uniformly mixed materials by a double-screw extruder at the following extrusion and granulation temperatures: 120 ℃/140 ℃/150 ℃/160 ℃/170 ℃/180 ℃/180 ℃/180 ℃/180 ℃/180 ℃, then the PVA shopping bag with the thickness of 10 mu m is prepared by a bag making machine after the film is formed by blowing through a thermoplastic extrusion film blowing machine at the temperature of 140 ℃/160 ℃/180 ℃/185 ℃/185 ℃/180 ℃.
Example 2
(1) Putting 100 parts by weight of PVA into a high-speed stirrer, stirring and heating to 75 ℃, and slowly adding 12 parts by weight of 1,2, 7-heptatriol;
(2) stirring at low speed for 80min, and controlling the temperature at 90 deg.C until PVA fully absorbs 1,2, 7-heptatriol;
(3) adding 0.3 weight part of smooth opening agent and 1.5 weight parts of anti-sticking agent and uniformly mixing;
(4) extruding and granulating the uniformly mixed materials by a double-screw extruder at the following extrusion and granulation temperatures: 120 ℃/140 ℃/150 ℃/160 ℃/170 ℃/180 ℃/180 ℃/180 ℃/180 ℃/180 ℃, then the PVA shopping bag with the thickness of 40 mu m is prepared by a bag making machine after the film is formed by blowing through a thermoplastic extrusion film blowing machine at the temperature of 140 ℃/160 ℃/180 ℃/185 ℃/185 ℃/180 ℃.
Example 3
(1) Putting 100 parts by weight of PVA into a high-speed stirrer, stirring and heating to 80 ℃, and slowly adding 15 parts by weight of 1,2, 7-heptatriol;
(2) stirring at low speed for 50min, and controlling the temperature at 100 deg.C until PVA fully absorbs 1,2, 7-heptatriol;
(3) adding 0.5 weight part of smooth opening agent and 2 weight parts of anti-sticking agent and uniformly mixing;
(4) extruding and granulating the uniformly mixed materials by a double-screw extruder at the following extrusion and granulation temperatures: 120 ℃/140 ℃/150 ℃/160 ℃/170 ℃/180 ℃/180 ℃/180 ℃/180 ℃/180 ℃, then the PVA shopping bag with the thickness of 80 mu m is prepared by a bag making machine after the film is formed by blowing through a thermoplastic extrusion film blowing machine at the temperature of 140 ℃/160 ℃/180 ℃/185 ℃/185 ℃/180 ℃.
Comparative example 1 differs from example 2 in that: 1,2, 7-heptatriol is replaced by glycerol.
Comparative example 2 differs from example 2 in that: 1,2, 7-heptatriol is replaced by ethylene glycol.
And (3) performance testing:
the tensile properties of the PVA shopping bags obtained in examples 1 to 3 and comparative examples 1 to 2 were measured by a material testing machine of Instron corporation, USA, in accordance with GB/T13022-1991; completely soaking the PVA shopping bag in an aqueous solution at the temperature of 20 ℃ for 24 hours, and observing whether the hydrolysis phenomenon occurs or not; the PVA shopping bag was completely immersed in an aqueous solution at a temperature of 50 ℃ and the time for complete hydrolysis was recorded. Specific results are shown in table 1:
TABLE 1
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. A high-strength normal-temperature insoluble PVA shopping bag is characterized by comprising the following components in parts by weight:
100 portions of PVA
8-15 parts of 1,2, 7-heptatriol
0.1-0.5 part of smooth opening agent
1-2 parts of anti-sticking agent.
2. A high-strength room-temperature insoluble PVA shopping bag as claimed in claim 1, wherein the PVA has a median degree of polymerization of 1800-2500 and a degree of alcoholysis of 88-99%.
3. A high-strength room-temperature insoluble PVA shopping bag according to claim 1, characterized in that the slip opener is an alkyl fatty acid, an alkyl fatty acid salt or an alkyl fatty amide.
4. A high-strength room-temperature insoluble PVA shopping bag according to claim 3, wherein the alkyl fatty acid is stearic acid.
5. A high-strength room-temperature insoluble PVA shopping bag according to claim 3, wherein the alkyl fatty acid salt is sodium stearate or potassium stearate.
6. A high-strength room-temperature insoluble PVA shopping bag according to claim 3, wherein the alkyl fatty amide is stearamide, oleamide or erucamide.
7. The high-strength normal-temperature insoluble PVA shopping bag according to claim 1, wherein the anti-sticking agent is talc powder, light calcium carbonate, white carbon black or titanium dioxide powder with 8000 meshes of 5000-.
8. A high-strength room-temperature insoluble PVA shopping bag according to claims 1 to 7, characterized by being prepared by the following steps:
(1) putting PVA into a high-speed stirrer, stirring and heating to 70-80 ℃, and slowly adding 1,2, 7-heptatriol;
(2) stirring at low speed for 50-120 min, and controlling the temperature at 80-100 deg.C until PVA fully absorbs 1,2, 7-heptatriol;
(3) adding smooth opening agent and anti-sticking agent, and mixing;
(4) and extruding and granulating the uniformly mixed materials by a double-screw extruder, blow-molding to form a film by a thermoplastic extrusion film blowing machine, and finally preparing the PVA shopping bags of various types and specifications by a bag making machine.
9. The method for preparing a high-strength normal-temperature insoluble PVA shopping bag according to claim 8, wherein the method comprises the following steps: the temperature of the extrusion granulation is as follows: 120 ℃/140 ℃/150 ℃/160 ℃/170 ℃/180 ℃/180 ℃/180 ℃/180 ℃.
10. The method for preparing a high-strength normal-temperature insoluble PVA shopping bag according to claim 8, wherein the method comprises the following steps: the blow molding film forming temperature is as follows: 140 ℃/160 ℃/180 ℃/185 ℃/185 ℃/180 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011328470.2A CN112679893B (en) | 2020-11-24 | 2020-11-24 | High-strength normal-temperature insoluble PVA shopping bag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011328470.2A CN112679893B (en) | 2020-11-24 | 2020-11-24 | High-strength normal-temperature insoluble PVA shopping bag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112679893A true CN112679893A (en) | 2021-04-20 |
| CN112679893B CN112679893B (en) | 2022-02-01 |
Family
ID=75446109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011328470.2A Active CN112679893B (en) | 2020-11-24 | 2020-11-24 | High-strength normal-temperature insoluble PVA shopping bag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112679893B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1073457A (en) * | 1991-11-07 | 1993-06-23 | 诺瓦蒙特股份公司 | Produce the method for plasticised polyvinyl alcohol and be used to prepare the thermoplastic compounds of starch-based, biodegradable |
| CN101864132A (en) * | 2010-05-26 | 2010-10-20 | 四川大学 | Fusion preparation method of polyvinyl alcohol film |
| CN103113698A (en) * | 2013-01-09 | 2013-05-22 | 湖南工业大学 | Plasticizer formula for hot melting process of partially alcoholized polyvinyl alcohol and process |
| JP2017193646A (en) * | 2016-04-21 | 2017-10-26 | 株式会社Adeka | Thermoplastic resin composition and molded body using the same |
| CN107936431A (en) * | 2016-10-13 | 2018-04-20 | 中国石油化工股份有限公司 | Polyvinyl alcohol water solubility casting films and preparation method thereof |
| WO2020049947A1 (en) * | 2018-09-03 | 2020-03-12 | Dic株式会社 | Additive for cellulose ester resin, and cellulose ester composition |
| CN111117124A (en) * | 2018-10-30 | 2020-05-08 | 华南理工大学 | Hot water soluble polyvinyl alcohol film and preparation method and application thereof |
| CN111218075A (en) * | 2020-02-28 | 2020-06-02 | 北京一撕得物流技术有限公司 | Medium-temperature water-soluble PVA composition for blow molding film, particles thereof and preparation method thereof |
-
2020
- 2020-11-24 CN CN202011328470.2A patent/CN112679893B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1073457A (en) * | 1991-11-07 | 1993-06-23 | 诺瓦蒙特股份公司 | Produce the method for plasticised polyvinyl alcohol and be used to prepare the thermoplastic compounds of starch-based, biodegradable |
| CN101864132A (en) * | 2010-05-26 | 2010-10-20 | 四川大学 | Fusion preparation method of polyvinyl alcohol film |
| CN103113698A (en) * | 2013-01-09 | 2013-05-22 | 湖南工业大学 | Plasticizer formula for hot melting process of partially alcoholized polyvinyl alcohol and process |
| JP2017193646A (en) * | 2016-04-21 | 2017-10-26 | 株式会社Adeka | Thermoplastic resin composition and molded body using the same |
| CN107936431A (en) * | 2016-10-13 | 2018-04-20 | 中国石油化工股份有限公司 | Polyvinyl alcohol water solubility casting films and preparation method thereof |
| WO2020049947A1 (en) * | 2018-09-03 | 2020-03-12 | Dic株式会社 | Additive for cellulose ester resin, and cellulose ester composition |
| CN111117124A (en) * | 2018-10-30 | 2020-05-08 | 华南理工大学 | Hot water soluble polyvinyl alcohol film and preparation method and application thereof |
| CN111218075A (en) * | 2020-02-28 | 2020-06-02 | 北京一撕得物流技术有限公司 | Medium-temperature water-soluble PVA composition for blow molding film, particles thereof and preparation method thereof |
Non-Patent Citations (4)
| Title |
|---|
| 上海塑料制品二厂: "《塑料挤出成型工艺》", 30 November 1978, 轻工业出版社 * |
| 王泰: "《凸版照相制板工艺原理》", 31 December 1981 * |
| 王澜等: "《高分子材料》", 31 January 2009, 中国轻工业出版社 * |
| 黄柏龄等: "《机织生产技术700问》", 30 April 2007, 中国纺织出版社 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112679893B (en) | 2022-02-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109456555A (en) | A kind of water-soluble polyvinyl alcohol film of blow molding and its preparation method and application | |
| US10954372B2 (en) | Water soluble shopping bag and preparation method thereof | |
| CN106700362A (en) | Polyvinyl alcohol full-biodegradation film having water resistance and preparation method thereof | |
| CN108929527A (en) | A kind of PBAT/ modified starch full-biodegradable film and its preparation method and application having both high ductibility and high obstructing performance | |
| CN111363207A (en) | Environment-friendly plasticizing system, thermoplastic chitosan material and preparation method thereof | |
| CN105542365A (en) | Modified PVA composite packaging film and preparation method thereof | |
| CN113845766A (en) | Preparation method of polyoxyethylene water-soluble film | |
| CN111440406A (en) | Antibacterial food packaging film and processing technology thereof | |
| CN104892999A (en) | High-water-resistance full-degradable plastic film and preparation method thereof | |
| CN112679893B (en) | High-strength normal-temperature insoluble PVA shopping bag | |
| CN101190977A (en) | Starch-base completely biological degradation plastic | |
| CN113087941A (en) | Water-soluble polyvinyl alcohol film and preparation method thereof | |
| CN109825016A (en) | A kind of biodegrade PVA stretch wrap film and preparation method thereof | |
| CN104448154A (en) | Radiation grafting long-chain branch polylactic acid and preparation method thereof | |
| CN106750566B (en) | Degradation plastic and its manufactured packaging bag | |
| CN104892998A (en) | Impact-resistant full-degradable plastic film and preparation method thereof | |
| CN102604290B (en) | Polyvinyl alcohol material of melt-processable and preparation method thereof | |
| CN104893220A (en) | Hydroxyapatite-modified full-degradable plastic film and preparation method thereof | |
| CN114605798A (en) | Production process of degradable high polymer material film | |
| CN107286612A (en) | A kind of plastic packaging bag | |
| JP3509026B2 (en) | Method for producing polyvinyl alcohol-based resin molded product | |
| CN111995786A (en) | High-weather-resistance energy-saving environment-friendly film and preparation method thereof | |
| US11505687B2 (en) | Environmentally degradable foamed master batch composition and using thereof | |
| CN115710412B (en) | High-barrier biaxially oriented degradable polyester film and preparation method thereof | |
| CN115926478A (en) | Composite degradable plastic and preparation method thereof |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |