CN115678224A - Biological full-degradable heat-shrinkable cigarette packaging film material and preparation method thereof - Google Patents
Biological full-degradable heat-shrinkable cigarette packaging film material and preparation method thereof Download PDFInfo
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- CN115678224A CN115678224A CN202211157280.8A CN202211157280A CN115678224A CN 115678224 A CN115678224 A CN 115678224A CN 202211157280 A CN202211157280 A CN 202211157280A CN 115678224 A CN115678224 A CN 115678224A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
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Abstract
The invention relates to a biological full-degradable heat-shrinkable cigarette packaging film material and a preparation method thereof. PLA (polylactic acid) uses starch raw materials proposed by renewable plant resources (such as corn) to obtain glucose through saccharification, and synthesizes polylactic acid with a certain molecular weight through a chemical synthesis method. PBAT is a copolymer of butanediol adipate and butanediol terephthalate, is thermoplastic biodegradable plastic, has good heat resistance, impact resistance, ductility and elongation at break, and has excellent biodegradability. Polyhydroxyalkanoate (PHA) is an intracellular polyester synthesized by microorganisms, is a natural high molecular biological material, can improve the compatibility of polylactic acid (PLA), polybutylene terephthalate (PBAT), biologically modified starch, calcium carbonate, biological enzyme and the like in a product formula, and improves the thermal processing performance of the product. The packaging film material can realize complete degradation and has the advantages of high strength, heat shrinkage and the like.
Description
Technical Field
The invention belongs to the technical field of cigarette packaging, and particularly relates to a biodegradable heat-shrinkable cigarette packaging film material and a preparation method thereof.
Background
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
In the prior art of cigarette packaging, in the process of delivering finished strip cigarettes to each retail outlet from a tobacco company, the tobacco company needs to package the strip cigarettes according to the quantity of the strip cigarettes in the retail outlet and then deliver the strip cigarettes at fixed points. The cigarette distribution packages are not uniform due to the fact that the size specification and the number of the strip cigarettes required by retail customers are not uniform. At present, the cigarette packaging materials are mainly distributed in three types, namely, the traditional plastic film causes environmental pollution; the plastic box can be recycled, but is opaque, low in cigarette packaging loading rate, easy to damage, frequent in maintenance, large in occupied space, heavy in box body and low in distribution efficiency; the cigarette needs to be recovered, is not easy to take out in a large quantity of cigarettes, is inconvenient to use and has low acceptance of cigarette retailers; non-degradable, etc.; and thirdly, the degradable winding film is adopted, and the cigarette packet is packaged and delivered in a winding mode. It has major problems of high cost; the cigarette packet adopts a winding mode, so that heat sealing cannot be realized, and the packaging is not tight; the application range is narrow, and the cigarette is only used for wrapping standard cigarettes at present; the film is semitransparent, so that the popularization and the application are inconvenient; low strength and poor protection to the cigarettes.
Disclosure of Invention
Aiming at the technical problem, the invention provides a biological full-degradable heat-shrinkable cigarette packaging film material and a preparation method thereof. The packaging film material can realize complete degradation and has the advantages of high strength, heat shrinkage and the like.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
the invention provides a preparation method of a biological full-degradable heat-shrinkable cigarette packaging film material, which comprises the following steps:
(1) Quantitatively adding polylactic acid (PLA), polybutylene terephthalate (PBAT), biologically modified starch, polyhydroxyalkanoate (PHA), calcium carbonate, biological enzyme and auxiliary materials into a mixing tank according to the proportion of a process formula through feeding equipment, and fully and uniformly mixing;
(2) Conveying the uniformly mixed materials to a material melting tank, and performing low-temperature hot melting on the raw material particles to form paste;
(3) Feeding the paste material after heating treatment into a material extruder, blowing a film by a film blowing machine, cooling and forming, and blowing a cylindrical packaging film by the film blowing machine; drawing and stretching, cutting edges, coiling and packaging.
Further, in the step (1), the raw materials are dried before being mixed, wherein the drying temperature is 60 ℃ and the drying time is 5min.
Further, the weight parts of the raw materials are as follows: 10-25 parts of polylactic acid (PLA), 10-22 parts of polybutylene terephthalate (PBAT), 0.5-2 parts of biologically modified starch, 0.5-3 parts of calcium carbonate, 1-3 parts of biological enzyme, 0.1-8 parts of polyhydroxyalkanoate and 2.1-6.6 parts of auxiliary material.
Further, the auxiliary materials comprise one or more of talcum powder, stearic acid amide and microcrystalline paraffin.
Further, the auxiliary materials comprise the following components in parts by weight: 2-6 parts of talcum powder, 0.05-0.3 part of stearic amide and 0.05-0.3 part of microcrystalline wax.
Further, in the step (1), the mixture was mixed at room temperature and stirred at 500rpm for 5min using a high-speed stirrer.
Further, the temperature of the low-temperature hot melting in the step (2) is 150 ℃ to 250 ℃.
Further, in the step (3), a single-screw extruder is adopted, the length-diameter ratio is 40, the temperature of the barrel is set in the 1-6 region, the temperature of the barrel is set in the processing temperature of the extruder is set in the 1-9 region, the temperature of the barrel is set in the 170 ℃, 175 ℃, 180 ℃, 185 ℃ and 185 ℃, and the temperature of the die head is set in the 1-9 region: feeding with an automatic feeder at 180 deg.C, 185 deg.C, 195 deg.C, 200 deg.C, 205 deg.C, 200 deg.C, 195 deg.C, 185 deg.C, 180 deg.C and screw rotation speed of 400-600 rpm. The feeding speed can be flexibly controlled according to the requirement on the thickness of the film, the drafting speed of the film is adjusted, the reasonable control of the surface tension (surface tension is 25-30kg is appropriate) of the film is realized, the detention time (less than 5min is appropriate) of the material in the charging barrel is flexibly realized, and if the detention time is too long, the extruded material is dark or yellow and becomes brittle, and the service performance of the product is influenced.
Furthermore, the full-automatic cigarette carton packing machine applies a heat-sealing cold-cutting technology to the cutting and sealing ring section, the temperature is 160-165 degrees in summer and 180-200 degrees in winter, no sticking is realized, the power consumption is low, the seal is firm, uniform and attractive, and the sealing and edge cutting are neat; the hot air diversion technology is applied in the thermal shrinkage link, and the technology effectively avoids fiber degradation caused by high-temperature heating of the degradable film.
Furthermore, the thickness of the biological full-degradable heat-shrinkable cigarette packaging film material is 25 +/-5 um.
In a second aspect of the invention, the biological full-degradable heat-shrinkable cigarette packaging film material prepared by the preparation method is provided.
The biological full-degradable and heat-shrinkable cigarette packaging film material provided by the invention is a high-tensile and full-biodegradable material, PLA (polylactic acid) is saccharified by using a starch raw material provided by renewable plant resources (such as corn) to obtain glucose, and the polylactic acid with a certain molecular weight is synthesized by a chemical synthesis method. PBAT is a copolymer of butylene adipate and butylene terephthalate, is thermoplastic product degradable plastic, has good heat resistance, impact resistance, ductility and elongation at break, and has excellent biodegradability. The biological modified starch adopts enzyme preparation for biological modification, and can improve the glossiness of the product appearance. Polyhydroxyalkanoate (PHA) is an intracellular polyester synthesized by microorganisms, is a natural high-molecular biodegradable material, and can improve the compatibility of calcium carbonate and biological enzymes in a product formula and improve the hot processing performance of the product.
The materials are fully and uniformly mixed by a biological reaction kettle, and are processed into a fully degradable packaging film by a blow molding machine after being subjected to low-temperature hot melting, the thickness of the packaging film is 25 +/-5 mu m, and the packaging film is applicable to cigarette distribution, and the thickness of the packaging film is universal, including but not limited to 25 +/-5 mu m, and can be flexibly adjusted according to index requirements on the strength, degradation period and the like of the packaging film.
The fully biodegradable material is suitable for processing film products by a casting process, has good toughness and excellent tensile property, is optimal for light, quick and automatic packaging, and has the advantages of quick heat sealing and high contraction ratio. After being used, the fertilizer can be completely degraded by microorganisms in the nature, and finally carbon dioxide and water are generated and directly enter soil organic matters or are absorbed by plants.
The invention has the beneficial effects that:
1. the cigarette packaging film processed by the new material of the biological full-degradable heat-shrinkable cigarette packaging film has good processing and use performances such as strength, flexibility, openness and the like.
2. The cigarette packaging film processed by the new material of the biodegradable and heat-shrinkable cigarette packaging film can realize heat sealing, is packed firmly and can protect cigarettes; meanwhile, the cigarette packaging machine is wide in application range, and can pack cigarettes of different cigarette standards, different quantities and different shapes and sizes.
3. The packaging film is suitable for the existing PE film packaging equipment of tobacco companies, the packaging line is basically unchanged, the packaging film can be put into use only by slightly modifying the film covering and the cutting and sealing ring section, the investment is small, and the effect is quick.
4. The new material of the biological fully-degradable and heat-shrinkable cigarette packaging film is produced based on biological material modification and recombination technology, fills up the blank of the domestic market, has good environmental protection performance, can be completely biodegraded by burying soil in a short time without recycling, can promote soil improvement, environmental protection and the like, and can well embody economic and social benefits.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic diagram of the preparation process of the present invention.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
Example 1
(1) Drying the raw materials at 60 ℃ for 5min before mixing, adding 18 parts of polylactic acid (PLA), 16 parts of polybutylene terephthalate (PBAT), 1 part of biologically modified starch, 1 part of Polyhydroxyalkanoate (PHA), 0.5 part of calcium carbonate, 2 parts of biological enzyme, 2 parts of talcum powder, 0.1 part of stearic acid amide and 0.1 part of microcrystalline wax into a mixing tank through feeding equipment according to a process formula proportion, and stirring the mixture for 5min at the rotating speed of 500rpm by using a high-speed stirrer to fully and uniformly mix;
(2) Conveying the uniformly mixed materials to a material melting tank, and performing low-temperature hot melting on the raw material particles to form paste;
(3) Feeding the paste material after heating treatment into a material extruder, wherein a single-screw extruder is adopted, the length-diameter ratio is 40, the temperature of a barrel is set in a 1-6 region, the temperature of 170 ℃, 175 ℃, 180 ℃, 185 ℃ and 185 ℃ are set in a processing temperature of the extruder, and the temperature of a die head is set in a 1-9 region: feeding with an automatic suction machine at 180 deg.C, 185 deg.C, 195 deg.C, 200 deg.C, 205 deg.C, 200 deg.C, 195 deg.C, 185 deg.C, 180 deg.C and screw rotation speed of 400-600 rpm. Film blowing, cooling and forming by a film blowing machine, and blowing a cylindrical packaging film by the film blowing machine; drawing, stretching, cutting edges, coiling and packaging.
The specific preparation process is shown in figure 1.
The prepared cigarette packaging film has certain tensile strength, can bear the weight of 5kg, is transparent, meets the requirement of heat sealing temperature of about 160 ℃, has flexibility, and can be shrunk after being heated.
Example 2
(1) Drying the raw materials at 60 ℃ for 5min before mixing, adding 20 parts of polylactic acid (PLA), 16 parts of polybutylene terephthalate (PBAT), 1 part of biologically modified starch, 2 parts of Polyhydroxyalkanoate (PHA), 1 part of calcium carbonate, 2 parts of biological enzyme, 2 parts of talcum powder, 0.2 part of stearic acid amide and auxiliary materials into a mixing tank through a feeding device according to the proportion of a process formula, and stirring the mixture for 5min at the rotating speed of 500rpm by using a high-speed stirrer to fully and uniformly mix;
(2) Conveying the uniformly mixed materials to a material melting tank, and performing low-temperature hot melting on the raw material particles to form paste;
(3) Feeding the paste material subjected to heating treatment into a material extruder, wherein a single-screw extruder is adopted, the length-diameter ratio is 40, the processing temperature of the extruder is set in a barrel region 1-6, and the temperatures of an extruder in regions 1-9 are set at 170 ℃, 175 ℃, 180 ℃, 185 ℃ and 1-9: feeding with an automatic suction machine at 180 deg.C, 185 deg.C, 195 deg.C, 200 deg.C, 205 deg.C, 200 deg.C, 195 deg.C, 185 deg.C, 180 deg.C and screw rotation speed of 400-600 rpm. Film blowing, cooling and forming by a film blowing machine, and blowing a cylindrical packaging film by the film blowing machine; drawing and stretching, cutting edges, coiling and packaging.
Example 3
(1) Drying the raw materials for 5min at 60 ℃ before mixing, adding 25 parts of polylactic acid (PLA), 20 parts of polybutylene terephthalate (PBAT), 1 part of biologically modified starch, 2 parts of Polyhydroxyalkanoate (PHA), 0.5 part of calcium carbonate, 1 part of biological enzyme, 2 parts of talcum powder, 0.1 part of stearic acid amide, 0.2 part of microcrystalline wax and auxiliary materials into a mixing tank through a feeding device according to the proportion of a process formula, and stirring for 5min at the rotating speed of 500rpm by using a high-speed stirrer to fully and uniformly mix;
(2) Conveying the uniformly mixed materials to a material melting tank, and performing low-temperature hot melting on the raw material particles to form paste;
(3) Feeding the paste material subjected to heating treatment into a material extruder, wherein a single-screw extruder is adopted, the length-diameter ratio is 40, the processing temperature of the extruder is set in a barrel region 1-6, and the temperatures of an extruder in regions 1-9 are set at 170 ℃, 175 ℃, 180 ℃, 185 ℃ and 1-9: feeding with an automatic suction machine at 180 deg.C, 185 deg.C, 195 deg.C, 200 deg.C, 205 deg.C, 200 deg.C, 195 deg.C, 185 deg.C, 180 deg.C and screw rotation speed of 400-600 rpm. Film blowing, cooling and forming by a film blowing machine, and blowing a cylindrical packaging film by the film blowing machine; drawing, stretching, cutting edges, coiling and packaging.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the present invention is not limited thereto, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalents can be made in the technical solutions described in the foregoing embodiments, or equivalents thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. Although the present invention has been described with reference to the specific embodiments, it should be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A preparation method of a biodegradable heat-shrinkable cigarette packaging film material is characterized by comprising the following steps:
(1) Quantitatively adding polylactic acid (PLA), polybutylene terephthalate (PBAT), biologically modified starch, polyhydroxyalkanoate (PHA) and auxiliary materials into a mixing tank through feeding equipment according to a process formula proportion, and fully and uniformly mixing;
(2) Conveying the uniformly mixed materials to a material melting tank, and performing low-temperature hot melting on the raw material particles to form paste;
(3) Feeding the paste material after heating treatment into a material extruder, blowing a film by a film blowing machine, cooling and forming, and blowing a cylindrical packaging film by the film blowing machine; drawing, stretching, cutting edges, coiling and packaging.
2. The preparation method according to claim 1, wherein in the step (1), the raw materials are dried before being mixed, wherein the drying temperature is 60 ℃ and the drying time is 5min.
3. The preparation method according to claim 1, wherein the weight parts of the raw materials are as follows: 10-25 parts of polylactic acid (PLA), 10-22 parts of polybutylene terephthalate (PBAT), 0.5-2 parts of biologically modified starch, 0.1-8 parts of polyhydroxyalkanoate, 0.5-3 parts of calcium carbonate, 1-3 parts of biological enzyme and 2.1-6.6 parts of auxiliary material.
4. The preparation method of claim 1, wherein the auxiliary materials comprise one or more of talcum powder, stearic acid amide and microcrystalline paraffin; the auxiliary materials comprise the following components in parts by weight: 2-6 parts of talcum powder, 0.05-0.3 part of stearic acid amide and 0.05-0.3 part of microcrystalline wax.
5. The method according to claim 1, wherein in the step (1), the mixture is mixed at normal temperature and stirred for 5min at 500rpm using a high-speed stirrer.
6. The method according to claim 1, wherein the low-temperature hot-melting temperature in the step (2) is 150 ℃ to 250 ℃.
7. The method according to claim 1, wherein a single screw extruder is used in the step (3), the length-to-diameter ratio is 40, the temperature of the extruder processing temperature is set in the sections 1 to 6 of the cylinder, 170 ℃, 175 ℃, 180 ℃, 185 ℃, and the temperature of the die is set in the sections 1 to 9: feeding with an automatic feeder at 180 deg.C, 185 deg.C, 195 deg.C, 200 deg.C, 205 deg.C, 200 deg.C, 195 deg.C, 185 deg.C, 180 deg.C and screw rotation speed of 400-600 rpm.
8. The method of claim 1, wherein the full automatic cigarette carton packaging machine applies heat seal cold cutting techniques at the cutting and sealing ring segments, 160 ° -165 ° in summer and 180 ° -200 ° in winter.
9. The method of claim 1, wherein the thickness of the biodegradable heat shrinkable cigarette packaging film material is 25 ± 5um.
10. The biodegradable heat shrinkable cigarette packaging film material prepared by the preparation method according to any one of the above claims.
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| CN202211157280.8A CN115678224A (en) | 2022-09-22 | 2022-09-22 | Biological full-degradable heat-shrinkable cigarette packaging film material and preparation method thereof |
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| CN202211157280.8A CN115678224A (en) | 2022-09-22 | 2022-09-22 | Biological full-degradable heat-shrinkable cigarette packaging film material and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090324917A1 (en) * | 2008-06-30 | 2009-12-31 | Kimberly-Clark Worldwide, Inc. | Biodegradable Packaging Film |
| CN109968755A (en) * | 2019-04-22 | 2019-07-05 | 刘建林 | Biodegradable composite package film and packaging bag |
| CN113861635A (en) * | 2021-10-19 | 2021-12-31 | 上海复命新材料科技有限公司 | Starch modified PBAT/PLA biodegradable plastic film and preparation method thereof |
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- 2022-09-22 CN CN202211157280.8A patent/CN115678224A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090324917A1 (en) * | 2008-06-30 | 2009-12-31 | Kimberly-Clark Worldwide, Inc. | Biodegradable Packaging Film |
| CN109968755A (en) * | 2019-04-22 | 2019-07-05 | 刘建林 | Biodegradable composite package film and packaging bag |
| CN113861635A (en) * | 2021-10-19 | 2021-12-31 | 上海复命新材料科技有限公司 | Starch modified PBAT/PLA biodegradable plastic film and preparation method thereof |
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