CN104109262B - A kind of thermoplastic starch-polyvinyl alcohol composite plastic film - Google Patents
A kind of thermoplastic starch-polyvinyl alcohol composite plastic film Download PDFInfo
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- CN104109262B CN104109262B CN201410305468.1A CN201410305468A CN104109262B CN 104109262 B CN104109262 B CN 104109262B CN 201410305468 A CN201410305468 A CN 201410305468A CN 104109262 B CN104109262 B CN 104109262B
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Abstract
The invention discloses a kind of thermoplastic starch-polyvinyl alcohol composite plastic film, relate to thin film fabrication techniques field, be made up of the raw material of following mass fraction: thermoplastic starch (self-control) 80-100 part, polyvinyl alcohol 40-55 part, vinylformic acid 10-15 part, benzoyl peroxide 5-10 part, oxidized polyethlene wax 7-12 part, Natvosol 4-8 part, calcium stearate 5-12 part, ferric oxide 5-15 part, gelatin 3-6 part, urea 5-10 part, polyoxyethylene glycol 8-15 part.The plastics film that the present invention obtains both had maintained the good biodegradability of starch, effectively improve again the mechanical property of plastics film, and adding of linking agent can introduce covalent linkage to replace hydrogen bond to improve being cross-linked with each other between starch and polyvinyl alcohol and other raw molecules.
Description
Technical field:
The present invention relates to thin film fabrication techniques field, be specifically related to a kind of thermoplastic starch-polyvinyl alcohol composite plastic film.
Background technology:
Biodegradable plastic film refers under certain condition, the macromolecular material of fully biodegradable under the microbial process of energy secreted enzyme, biological damage plastics and complete biodegradable plastics can be divided into, wherein the most rising is full-starch plastic film, this kind of plastics film can be biodegradable after a procedure completely, produce carbonic acid gas and water, free from environmental pollution, be the Main way of recent domestic biodegradable starch-plastics thin film study.And starch is owing to being difficult to casting, the shortcomings such as product bad mechanical property, make the purposes of starch be restricted.Therefore, starch could as materials'use after having to pass through surface physics or chemical modification.
Summary of the invention:
Technical problem to be solved by this invention is to provide thermoplastic starch-polyvinyl alcohol composite plastic film that a kind of technique is simple, good mechanical properties, production cost are low.
Technical problem to be solved by this invention adopts following technical scheme to realize:
A kind of thermoplastic starch-polyvinyl alcohol composite plastic film, be made up of the raw material of following mass fraction:
Thermoplastic starch (self-control) 80-100 part, polyvinyl alcohol 40-55 part, vinylformic acid 10-15 part, benzoyl peroxide 5-10 part, oxidized polyethlene wax 7-12 part, Natvosol 4-8 part, calcium stearate 5-12 part, ferric oxide 5-15 part, gelatin 3-6 part, urea 5-10 part, polyoxyethylene glycol 8-15 part.
Described thermoplastic starch is the one in thermoplasticity W-Gum, thermoplasticity wheat starch, thermoplasticity oat starch, thermoplasticity barley starch, thermoplastic wood sweet potato starch, thermoplasticity yam starch, thermoplasticity buckwheat starch, thermoplasticity bean powder.
The preparation method of described thermoplastic starch is: mixed in high-speed mixer with water, glycerine, urea by starch, then the Banbury mixer banburying 20min of rotating speed 100r/min, temperature 120-140 DEG C is placed in, refining, compressing tablet is driven in 150 DEG C again with two roll plastic mixing mill, be ground into fine particle after cooling, obtain thermoplastic starch.
A preparation method for thermoplastic starch-polyvinyl alcohol composite plastic film, comprises the steps:
Step a: mixed in described ratio with all the other raw materials by homemade thermoplastic starch, carries out melt extruding granulation with twin screw extruder, obtains thermoplastic starch-polyvinyl alcohol master batch;
Step b: thermoplastic starch-polyethylene master batch obtained for step a to be added in inflation film manufacturing machine through intensification melting, to extrude, blowing, upper traction, lower traction and winding film forming.
The invention has the beneficial effects as follows: the present invention for main raw material with thermoplastic starch and polyvinyl alcohol, had both maintained the biodegradability that starch is good, and effectively improve again the mechanical property of plastics film; Adding of linking agent can introduce covalent linkage, to replace hydrogen bond to improve being cross-linked with each other between starch and polyvinyl alcohol and other raw molecules; And its preparation method is simple, production cost is low, is conducive to suitability for industrialized production.
Embodiment:
The technique means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, setting forth the present invention further below.
Embodiment 1:
Thermoplastic starch (self-control) 80 parts, polyvinyl alcohol 40 parts, 10 parts, vinylformic acid, benzoyl peroxide 5 parts, oxidized polyethlene wax 7 parts, Natvosol 4 parts, calcium stearate 5 parts, ferric oxide 5 parts, 3 parts, gelatin, 5 parts, urea, polyoxyethylene glycol 8 parts.
Embodiment 2:
Thermoplastic starch (self-control) 90 parts, polyvinyl alcohol 50 parts, 12 parts, vinylformic acid, benzoyl peroxide 8 parts, oxidized polyethlene wax 10 parts, Natvosol 6 parts, calcium stearate 8 parts, ferric oxide 10 parts, 4 parts, gelatin, 7 parts, urea, polyoxyethylene glycol 10 parts.
Embodiment 3:
Thermoplastic starch (self-control) 100 parts, polyvinyl alcohol 55 parts, 15 parts, vinylformic acid, benzoyl peroxide 10 parts, oxidized polyethlene wax 12 parts, Natvosol 8 parts, calcium stearate 12 parts, ferric oxide 15 parts, 6 parts, gelatin, 10 parts, urea, polyoxyethylene glycol 15 parts.
Thermoplastic starch used is the one in thermoplasticity W-Gum, thermoplasticity wheat starch, thermoplasticity oat starch, thermoplasticity barley starch, thermoplastic wood sweet potato starch, thermoplasticity yam starch, thermoplasticity buckwheat starch, thermoplasticity bean powder.
The preparation method of thermoplastic starch is: mixed in high-speed mixer with water, glycerine, urea by starch, then the Banbury mixer banburying 20min of rotating speed 100r/min, temperature 120-140 DEG C is placed in, refining, compressing tablet is driven in 150 DEG C again with two roll plastic mixing mill, be ground into fine particle after cooling, obtain thermoplastic starch.
Prepare thermoplastic starch-polyvinyl alcohol composite plastic film according to the proportioning raw materials of embodiment 1-3, comprise the steps:
Step a: mixed in described ratio with all the other raw materials by homemade thermoplastic starch, carries out melt extruding granulation with twin screw extruder, obtains thermoplastic starch-polyvinyl alcohol master batch;
Step b: thermoplastic starch-polyethylene master batch obtained for step a to be added in inflation film manufacturing machine through intensification melting, to extrude, blowing, upper traction, lower traction and winding film forming.
The tensile strength of the thermoplastic starch obtained embodiment 1-3 according to existing National Standard Method-polyvinyl alcohol composite plastic film, elongation at break, transmittance, anti-fog effect, film both sides temperature head and soil degrading time measure, and result is as shown in the table:
| Embodiment 1 | Embodiment 2 | Embodiment 3 | PE film | PVC film | |
| Tensile strength (MPa) | 35 | 42 | 39 | 13 | 21 |
| Elongation at break (%) | 324 | 365 | 371 | 154 | 123 |
| Transmittance (%) | 94 | 95 | 95 | 88 | 91 |
| Anti-fog effect | Excellent | Excellent | Excellent | Generally | Excellent |
| Film both sides temperature head (DEG C) | 8 | 9 | 9 | 4 | 5 |
As can be seen from the above table, the mechanical property of the thermoplastic starch prepared by embodiment 1-3-polyvinyl alcohol composite plastic film, transmittance and heat retaining property are all better than common PE film and PVC film; And research finds that film prepared by the present invention also has excellent biodegradability, can be degraded completely in its at room temperature 4-5 month, be far superior to degradation time 9-15 month of common degradable film.
The present invention for main raw material with thermoplastic starch and polyvinyl alcohol, had both maintained the biodegradability that starch is good, had effectively improve again the mechanical property of plastics film; Adding of linking agent can introduce covalent linkage, to replace hydrogen bond to improve being cross-linked with each other between starch and polyvinyl alcohol and other raw molecules; And its preparation method is simple, production cost is low, is conducive to suitability for industrialized production.
More than show and describe ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification sheets just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (3)
1. thermoplastic starch-polyvinyl alcohol composite plastic film, is characterized in that, is made up of the raw material of following mass fraction:
Homemade thermoplastic starch 80-100 part, polyvinyl alcohol 40-55 part, vinylformic acid 10-15 part, benzoyl peroxide 5-10 part, oxidized polyethlene wax 7-12 part, Natvosol 4-8 part, calcium stearate 5-12 part, ferric oxide 5-15 part, gelatin 3-6 part, urea 5-10 part, polyoxyethylene glycol 8-15 part;
The preparation method of described homemade thermoplastic starch is: mixed in high-speed mixer with water, glycerine, urea by starch, then the Banbury mixer banburying 20min of rotating speed 100r/min, temperature 120-140 DEG C is placed in, refining, compressing tablet is driven in 150 DEG C again with two roll plastic mixing mill, be ground into fine particle after cooling, obtain thermoplastic starch.
2. thermoplastic starch according to claim 1-polyvinyl alcohol composite plastic film, is characterized in that: described thermoplastic starch is the one in thermoplasticity W-Gum, thermoplasticity wheat starch, thermoplasticity oat starch, thermoplasticity barley starch, thermoplastic wood sweet potato starch, thermoplasticity yam starch, thermoplasticity buckwheat starch, thermoplasticity bean powder.
3. a preparation method for thermoplastic starch-polyvinyl alcohol composite plastic film as claimed in claim 1, is characterized in that, comprise the steps:
Step a: mixed in described ratio with all the other raw materials by homemade thermoplastic starch, carries out melt extruding granulation with twin screw extruder, obtains thermoplastic starch-polyvinyl alcohol master batch;
Step b: thermoplastic starch-polyethylene master batch obtained for step a to be added in inflation film manufacturing machine through intensification melting, to extrude, blowing, upper traction, lower traction and winding film forming.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410305468.1A CN104109262B (en) | 2014-06-30 | 2014-06-30 | A kind of thermoplastic starch-polyvinyl alcohol composite plastic film |
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| CN201410305468.1A CN104109262B (en) | 2014-06-30 | 2014-06-30 | A kind of thermoplastic starch-polyvinyl alcohol composite plastic film |
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| CN104109262A CN104109262A (en) | 2014-10-22 |
| CN104109262B true CN104109262B (en) | 2016-04-27 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107513180A (en) * | 2016-06-16 | 2017-12-26 | 江南大学 | A kind of PE/Starch alcohol composite and preparation method |
| CN106751271A (en) * | 2016-12-14 | 2017-05-31 | 陈强 | A kind of polyvinyl alcohol preserving fruit and vegetable utilizing film for alleviating chlorophyll photo-chlorimation and preparation method thereof |
| CN107915870A (en) * | 2017-12-06 | 2018-04-17 | 王虎林 | A kind of high-strength thermoplastic resin suitable for decoration materials |
| CN110016161A (en) * | 2019-04-18 | 2019-07-16 | 刘杰 | A kind of Wholly-degradable material and preparation method for shopping bag, mulch and awning film |
| CN110229404A (en) * | 2019-06-19 | 2019-09-13 | 蔡明� | A kind of preparation method of degradable beam mouth refuse bag |
| CN111057289A (en) * | 2019-12-16 | 2020-04-24 | 沈阳工业大学 | LDPE/corn starch/TiO2Antibacterial composite membrane and preparation method thereof |
| CN113493572B (en) * | 2021-07-22 | 2023-04-07 | 上海乐亿塑料制品有限公司 | Degradable environment-friendly plastic film, preparation method and application thereof |
| CN114589831B (en) * | 2022-01-22 | 2024-04-05 | 中北大学 | Thermoplastic starch or starch/macromolecule blend prepared by in-situ reaction extrusion plasticizing or plasticizing compatibilization process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1935878A (en) * | 2006-10-20 | 2007-03-28 | 中国科学院长春应用化学研究所 | Multifunctional degradable liquid-state mulch film and its preparing method |
| CN101007881A (en) * | 2007-01-08 | 2007-08-01 | 华南理工大学 | Starch and polyvinyl alcohol thermoplastic material preparation method |
| CN101353400A (en) * | 2008-09-11 | 2009-01-28 | 四川大学 | Preparation of biodegradable thermoplastic starch plastic having high starch content |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1935878A (en) * | 2006-10-20 | 2007-03-28 | 中国科学院长春应用化学研究所 | Multifunctional degradable liquid-state mulch film and its preparing method |
| CN101007881A (en) * | 2007-01-08 | 2007-08-01 | 华南理工大学 | Starch and polyvinyl alcohol thermoplastic material preparation method |
| CN101353400A (en) * | 2008-09-11 | 2009-01-28 | 四川大学 | Preparation of biodegradable thermoplastic starch plastic having high starch content |
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