CN105273242A - Degradable film and preparation method thereof - Google Patents
Degradable film and preparation method thereof Download PDFInfo
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- CN105273242A CN105273242A CN201510685727.2A CN201510685727A CN105273242A CN 105273242 A CN105273242 A CN 105273242A CN 201510685727 A CN201510685727 A CN 201510685727A CN 105273242 A CN105273242 A CN 105273242A
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- inulin
- xylitol
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Abstract
The invention discloses a degradable film and a preparation method thereof and belongs to the technical field of food packaging. The degradable film comprises raw materials in parts by weight as follows: 80-120 parts of inulin, 10-40 parts of tea polyphenols, 10-20 parts of gellan gum, 5-10 parts of xylitol, 5-10 parts of sodium alginate and 200-400 parts of water. The invention further provides the preparation method of the degradable film. The degradable film is obtained by dissolving, fully dispersing, gelatinizing, pouring, drying, ageing, extruding and injection-molding the raw materials. According to the degradable film, the inulin and the tea polyphenols are fully mixed, under the action of the gellan gum, the xylitol and the sodium alginate, the synergistic effect of the raw materials is greatly improved, and the obtained film is natural and edible, has the high degradation velocity, the good tensile strength, the high elongation at break and the good water retention performance, is convenient to use and is low in cost.
Description
Technical field
The invention belongs to the technical field of food product pack, refer to a kind of degradable films and preparation method thereof especially.
Background technology
Food packaging film is the membrane container for splendid attire and protection food, and current food packaging film is ubiquitous in life, and modern production and life all be unable to do without them.Edible film refers to the film obtained by edible material, mainly through preventing the migration of gas, steam and solute to ensure the quality of food, extends the shelf-lives of food.Edible packaging seen in daily life has a variety of, and each edible film has its weak point, as the wafer in polyose film, though have edibility, and its intensity difference, meet water and to make moist cracky, industrial scale is little, is difficult to the demand meeting food product pack; The edibility casing that animal small intestine and for example in protein film processes, although properties is all better, because of its cost is too high also cannot on a large scale for food product pack.
Summary of the invention
The invention provides a kind of degradable films and preparation method thereof, solve food product packing film intensity difference in prior art, cost is high and affect its problem used.
A kind of degradable films of the present invention, it is mainly realized by the following technical programs: the raw material comprising following weight part: inulin 80-120 part, tea-polyphenol 10-40 part, gellan gum 10-20 part, Xylitol 5-10 part, sodium alginate 5-10 part, water 200-400 part.
The preparation method of a kind of degradable films of the present invention, it is mainly realized by the following technical programs: comprise the following steps: 1) inulin and tea-polyphenol are dissolved in the water, stir, and add gellan gum, Xylitol and sodium alginate, be placed in ultrasonic wave separating apparatus and disperse 40-60min, obtain rubber cement liquid; 2) by the gelatinization at 40 DEG C of step 1) gained rubber cement liquid, continue to stir, then, be poured in mould, dry 10h at 60 DEG C, cooling, takes off film, obtains first product; 3) by step 2) gained first product is ageing 20-36h in the environment of 60% in relative humidity, and carry out extruding and film-making, finally, injection moulding, obtains film.
Beneficial effect of the present invention: inulin and tea-polyphenol fully merge by degradable films of the present invention, under the effect of gellan gum, Xylitol and sodium alginate, substantially increase the mutual synergy between raw material, its consistency is good, gained film is a kind of edible natural film, and use safety is relieved; This film can be degraded rapidly after finishing using, and can not cause environmental pollution, can not work the mischief to human body; Meanwhile, this film has good tensile strength and elongation at break in use, and the water retention property of this film is good, easy to use, and cost is low, economical and practical.
Embodiment
Be clearly and completely described technical scheme of the present invention below in conjunction with specific embodiments of the invention, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
A kind of degradable films of the present invention, comprises the raw material of following weight part: inulin 80-120 part, tea-polyphenol 10-40 part, gellan gum 10-20 part, Xylitol 5-10 part, sodium alginate 5-10 part, water 200-400 part.
The preparation method of a kind of degradable films of the present invention, comprises the following steps: 1) inulin and tea-polyphenol are dissolved in the water, stir, and adds gellan gum, Xylitol and sodium alginate, is placed in ultrasonic wave separating apparatus and disperses 40-60min, obtain rubber cement liquid; 2) by the gelatinization at 40 DEG C of step 1) gained rubber cement liquid, continue to stir, then, be poured in mould, dry 10h at 60 DEG C, cooling, takes off film, obtains first product; 3) by step 2) gained first product is ageing 20-36h in the environment of 60% in relative humidity, and carry out extruding and film-making, finally, injection moulding, obtains film.
embodiment one
A kind of preparation method of degradable films, comprise the following steps: the tea-polyphenol of the inulin of 80 weight parts and 10 weight parts is dissolved in the water of 200 weight parts, stir, and add the sodium alginate of the gellan gum of 10 weight parts, the Xylitol of 5 weight parts and 5 weight parts, be placed in ultrasonic wave separating apparatus and disperse 40min, obtain rubber cement liquid; By the gelatinization at 40 DEG C of above-mentioned rubber cement liquid, continue to stir, then, be poured in mould, dry 10h at 60 DEG C, cooling, takes off film, obtains first product; Be ageing 20h in the environment of 60% in relative humidity by above-mentioned first product, and carry out extruding and film-making, finally, injection moulding, obtains film.
embodiment two
A kind of preparation method of degradable films, comprise the following steps: the tea-polyphenol of the inulin of 100 weight parts and 25 weight parts is dissolved in the water of 300 weight parts, stir, and add the sodium alginate of the gellan gum of 15 weight parts, the Xylitol of 8 weight parts and 7 weight parts, be placed in ultrasonic wave separating apparatus and disperse 50min, obtain rubber cement liquid; By the gelatinization at 40 DEG C of above-mentioned rubber cement liquid, continue to stir, then, be poured in mould, dry 10h at 60 DEG C, cooling, takes off film, obtains first product; Be ageing 28h in the environment of 60% in relative humidity by above-mentioned first product, and carry out extruding and film-making, finally, injection moulding, obtains film.
embodiment three
A kind of preparation method of degradable films, comprise the following steps: the tea-polyphenol of the inulin of 120 weight parts and 40 weight parts is dissolved in the water of 400 weight parts, stir, and add the sodium alginate of the gellan gum of 20 weight parts, the Xylitol of 10 weight parts and 10 weight parts, be placed in ultrasonic wave separating apparatus and disperse 60min, obtain rubber cement liquid; By the gelatinization at 40 DEG C of above-mentioned rubber cement liquid, continue to stir, then, be poured in mould, dry 10h at 60 DEG C, cooling, takes off film, obtains first product; Be ageing 36h in the environment of 60% in relative humidity by above-mentioned first product, and carry out extruding and film-making, finally, injection moulding, obtains film.
Embodiment one is selected soil microorganisms natural degradation to three kinds of films of embodiment three gained with certain commercially available food grade film, the soil pH selected is 7.83, organic mass content is 47.00g/Kg, the mass content of alkali-hydrolyzable nitrogen is 25.02mg/100g, the mass content of rapid available phosphorus is 32.78g/Kg, film is embedded in soil 15cm depths, measure its degradation rate after 5 days, experimental result is as shown in table 1.
Table 1 film performance test Comparative result table
Embodiment one is put into a certain amount of discolour silica gel to three kinds of films of embodiment three gained with certain commercially available food grade film employing Fisher infiltration cup (the method ASTM1999 of FisherScientific) in small beaker, with obtained film seal, test cup to be placed in the moisture eliminator of 25 degree and 50% relative humidity 24 hours, by measuring the weightening finish of discolour silica gel in beaker, by the water vapour transmission coefficient (WVP) of formulae discovery film, WVP=(M × d)/(A × t × p); In formula: M is the silica gel mass weight gain in the t time, g; D is thickness of sample, mm; A is the area of sample moisture vapor, m
2; T is twice interval time after mass weight gain is stablized, d; P is style both sides water vapour pressure reduction, Kpa; Experimental result is as shown in table 1.
Embodiment one is adopted the XWL(PC of Jinan blue streak company to three kinds of films of embodiment three gained and certain commercially available cling film) the smart electronics tension tester of model carries out pulling force mensuration by GB13022-91 standard, and experimental result is as shown in table 1.
As can be seen from Table 1, compared with control group i.e. certain commercially available food grade film, film of the present invention has good degradation property, and all degradable, degradation rate reaches 100%; Film of the present invention has good water retention property, greatly reduces the change of wrapped product weight; Film tensile strength of the present invention, all at more than 18MPa, has good mechanical property.
Therefore, compared with prior art, the invention has the beneficial effects as follows: inulin and tea-polyphenol fully merge by degradable films of the present invention, under the effect of gellan gum, Xylitol and sodium alginate, substantially increase the mutual synergy between raw material, its consistency is good, and gained film is a kind of edible natural film, and use safety is relieved; This film can be degraded rapidly after finishing using, and can not cause environmental pollution, can not work the mischief to human body; Meanwhile, this film has good tensile strength and elongation at break in use, and the water retention property of this film is good, easy to use, and cost is low, economical and practical.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. a degradable films, is characterized in that, comprises the raw material of following weight part:
Inulin 80-120 part, tea-polyphenol 10-40 part, gellan gum 10-20 part, Xylitol 5-10 part, sodium alginate 5-10 part, water 200-400 part.
2. the preparation method of degradable films according to claim 1, is characterized in that, comprises the following steps:
1) inulin and tea-polyphenol are dissolved in the water, stir, and add gellan gum, Xylitol and sodium alginate, be placed in ultrasonic wave separating apparatus and disperse 40-60min, obtain rubber cement liquid;
2) by the gelatinization at 40 DEG C of step 1) gained rubber cement liquid, continue to stir, then, be poured in mould, dry 10h at 60 DEG C, cooling, takes off film, obtains first product;
3) by step 2) gained first product is ageing 20-36h in the environment of 60% in relative humidity, and carry out extruding and film-making, finally, injection moulding, obtains film.
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| CN201510685727.2A CN105273242A (en) | 2015-10-21 | 2015-10-21 | Degradable film and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510685727.2A CN105273242A (en) | 2015-10-21 | 2015-10-21 | Degradable film and preparation method thereof |
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| CN105273242A true CN105273242A (en) | 2016-01-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106117607A (en) * | 2016-07-04 | 2016-11-16 | 铜陵方正塑业科技有限公司 | A kind of inulin modification γ polyglutamic acid grafting arghan packaging film and preparation method thereof |
| CN106810808A (en) * | 2016-12-20 | 2017-06-09 | 安徽省阜阳市国泰彩印包装有限公司 | A kind of degradable plastic sheeting composite of Tea Polyphenols antibacterial and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008079525A (en) * | 2006-09-27 | 2008-04-10 | Ina Food Ind Co Ltd | Edible film |
| CN103627036A (en) * | 2013-11-07 | 2014-03-12 | 青岛文创科技有限公司 | Seaweed polyphenol-alantin-based degradable composite film and preparation method thereof |
| CN104356412A (en) * | 2014-11-10 | 2015-02-18 | 江西师范大学 | Preparation method of fish scale gelatin starch antioxidant edible composite film |
-
2015
- 2015-10-21 CN CN201510685727.2A patent/CN105273242A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008079525A (en) * | 2006-09-27 | 2008-04-10 | Ina Food Ind Co Ltd | Edible film |
| CN103627036A (en) * | 2013-11-07 | 2014-03-12 | 青岛文创科技有限公司 | Seaweed polyphenol-alantin-based degradable composite film and preparation method thereof |
| CN104356412A (en) * | 2014-11-10 | 2015-02-18 | 江西师范大学 | Preparation method of fish scale gelatin starch antioxidant edible composite film |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106117607A (en) * | 2016-07-04 | 2016-11-16 | 铜陵方正塑业科技有限公司 | A kind of inulin modification γ polyglutamic acid grafting arghan packaging film and preparation method thereof |
| CN106810808A (en) * | 2016-12-20 | 2017-06-09 | 安徽省阜阳市国泰彩印包装有限公司 | A kind of degradable plastic sheeting composite of Tea Polyphenols antibacterial and preparation method thereof |
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