CN109897258A - A kind of plastic film and preparation method thereof used in cutlery box inner surface - Google Patents
A kind of plastic film and preparation method thereof used in cutlery box inner surface Download PDFInfo
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- CN109897258A CN109897258A CN201910060571.7A CN201910060571A CN109897258A CN 109897258 A CN109897258 A CN 109897258A CN 201910060571 A CN201910060571 A CN 201910060571A CN 109897258 A CN109897258 A CN 109897258A
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Abstract
The invention discloses a kind of plastic films and preparation method thereof that can be used in cutlery box inner surface, can include upper layer and middle layer composition with the plastic film in cutlery box inner surface；Preparation can include: polyethylene, tea polyphenols, purple sweet potato starch, p-hydroxybenzoate methyl esters, sodium carboxymethylcellulose with the raw material of the layer on the plastic film of cutlery box inner surface；It includes: polyethylene, tea polyphenols, purple sweet potato starch, p-hydroxybenzoate methyl esters, sodium carboxymethylcellulose, sawdust that preparation, which can be used in the raw material of the plastic film middle layer of cutlery box inner surface,；Using preparation method of the invention, each section raw material cooperates, and the plastic film material used in cutlery box inner surface being prepared is environmentally protective, can be with fast degradation, while having the effect of efficient absorption grease stain；Preparation method is simple, can be widely applied.
Description
Technical field
The present invention relates to film production manufacture fields, thin in particular to a kind of plastics that can be used in cutlery box inner surface
Film and preparation method thereof.
Background technique
Progressive with the epoch with the development of science and technology, human living standard steps up, and more and more people are to quality kimonos
The emphasis of business is especially valued.Allegro pace of life has become the mainstream in epoch, the fast service restaurant industry development risen therewith
Rapidly, the take-away food delivery being seen everywhere is packaged packed meal, so widely uses mess-tin, the requirement to its quality is also increasingly
Height uses on a large scale after all, and the pressure caused by environment is also huge, while whether mess-tin itself can genuine health
The topic that harmless and consumer extremely pays close attention to.Instantly, a kind of plastic film that can be used in cutlery box inner surface is prepared, to change
The dining health of kind consumer, and there is healthy harmless, the small feature of environmental pollution, seem especially heavy in life instantly
It wants.
The disclosure of the invention of Chinese patent CN104109264A a kind of modified starch-polyethylene composite plastic film and its system
Preparation Method is related to plastic film production technical field, is made of the raw material of following mass fraction: 80-100 parts of starch, polyethylene
45-55 parts, 4-5 parts of 30% hydrogen peroxide, 4.5-6 parts of sulfuric acid, 10-15 parts of glycerol, 5-10 parts of fish phosphorus glue, 5-8 parts of polylactic acid, nanometer
3-8 parts of silica, 5-10 parts of paraffin, 1-4 parts of peroxide, 100-150 parts of water, modified starch and other raw materials press institute
After stating ratio mixing, through melting, extrusion, blow molding, cooling, film forming is batched.Plastic film intensity produced by the present invention is high, at low cost
And it is biodegradable, white pollution problems, the composite plastic film poor mechanical property of the invention preparation, Bu Nengchang can be effectively relieved
Time uses, while sulfuric acid and peroxide have strong corrosive and oxidisability in raw material, are unfavorable for the life of composite plastic film
It produces.
The patent of invention of Chinese patent CN104845400A provide it is a kind of with stalk prepare disposable grease-proof and waterproof can
Degradation cutlery box and preparation method thereof.The degradable cutlery box of disposable grease-proof and waterproof prepared with stalk of the invention, by following weight
The raw material of part is prepared: 50-100 parts of corn stover, 50-100 parts of wheat stalk, 50-100 parts of purple perilla straw, leaf of bamboo 50-
100 parts, 1-7 parts of auxiliary agent, 0.5-2.5 parts of oil-proofing agent, 0.5-2.5 parts of paraffin.Of the invention being prepared with stalk is disposable grease proofing
Water-resistant degradable cutlery box, product grease proofness and water-tolerant, manufacture craft is simple, and production cost is low, degradable, safe and non-toxic；
The dining box structure intensity prepared in the invention using stalk and auxiliary agent is inadequate, is easily deformed, application range is narrow.
Existing mess-tin product structure is unstable, the oil-borne stains difference of absorption in order to solve, while use for a long time is unfavorable for disappearing
Expense person's health and difficult problem of degrading, now provide that a kind of simple process, production cost is low, fast prompt drop may be implemented
The plastic film used in cutlery box inner surface of solution and efficient absorption grease stain, is pressed together on mess-tin inner surface to solve above-mentioned ask
Topic.
Summary of the invention
The main purpose of the present invention is to provide a kind of plastic film and preparation method thereof that can be used in cutlery box inner surface, with
Mess-tin product structure is unstable in the prior art for solution, adsorbs oil-borne stains difference, while use for a long time is unfavorable for consumer's body
The problem of body health and degradation difficulty.
To achieve the goals above, the present invention provides a kind of plastic film that can be used in cutlery box inner surface, meal can be used in
The plastic film of box inner surface includes upper layer and middle layer composition；The upper surface of the plastic film of cutlery box inner surface can be used in
Contain the tiny aperture being evenly distributed；Preparation can be with the raw material of the layer on the plastic film of cutlery box inner surface by weight
It include: 50 parts~60 parts of polyethylene, 10 parts~15 parts of tea polyphenols, 2 parts~4 parts, 1 part of p-hydroxybenzoate methyl esters of purple sweet potato starch
~1.5 parts, 2 parts~4 parts of sodium carboxymethylcellulose；Preparation can be used in the raw material of the plastic film middle layer of cutlery box inner surface by weight
Measuring part meter includes: 50 parts~60 parts of polyethylene, 10 parts~15 parts of tea polyphenols, 2 parts of purple sweet potato starch~4 parts, p-hydroxybenzoate
1 part~1.5 parts of methyl esters, 2 parts~4 parts of sodium carboxymethylcellulose, 1 part~2 parts of sawdust.
Further, preparing can include: by weight with the raw material of the layer on the plastic film of cutlery box inner surface
55 parts of polyethylene, 12 parts of tea polyphenols, 3 parts of purple sweet potato starch, 1.2 parts of p-hydroxybenzoate methyl esters, 3 parts of sodium carboxymethylcellulose；
It includes: 55 parts of polyethylene, tea polyphenols 12 that preparation can be used in the raw material of the plastic film middle layer of cutlery box inner surface by weight
Part, 3 parts of purple sweet potato starch, 1.2 parts of p-hydroxybenzoate methyl esters, 3 parts of sodium carboxymethylcellulose, 1.5 parts of sawdust.
Further, the upper and lower surface of plastic film of cutlery box inner surface can be used in and the thickness proportion of middle layer is,
10 μm: 10 μm: 10 μm.
Further, the mesh number of sawdust is 200 mesh~300 mesh.
Another object according to the present invention is to provide a kind of preparation side of plastic film that can be used in cutlery box inner surface
Method, comprising the following steps:
Step a, it is 300mpas~500mpas's that the sodium carboxymethylcellulose of the parts by weight, which is configured to viscosity,
The purple sweet potato starch of the parts by weight is added in solution, and under conditions of temperature is 60 DEG C~65 DEG C, ultrasonic 1h~2h obtains mixing molten
Liquid；
The polyethylene of the parts by weight, tea polyphenols, the addition of p-hydroxybenzoate methyl esters are preheated to 85 by step b in advance
DEG C~90 DEG C of stirred tank in, stirred tank is warming up to 145 DEG C~155 DEG C with 5 DEG C/min~8 DEG C/min rate, and keeps
Mixed solution obtained in step a is added later and is stirred until homogeneous, obtains mixed material by 15min；
Mixed material obtained in step c, step b continues to be heated to 185 DEG C~195 DEG C, respectively three groups of addition extruders
No. 1, No. 2, in No. 3 hoppers, extruder screw is with the rotational speed of 400r/min~600r/min, after merging respectively, passes through
Runner is extruded into thin-wall tube by head annular die gap；
Step d, after extrusion, with compressed air by its inflation under flow regime, after being cooled to 10 DEG C~15 DEG C sizings,
The upper surface of the plastic film carries out needle thorn, and the tiny aperture being evenly distributed presss from both sides flat rear trimming and winds to obtain and can be used in
The plastic film of cutlery box inner surface.
Further, in step c, continue in heating process, it is when control water content is 10%~15%, mixed material is equal
Divide and extruder is added.
Further, in step c, in No. 2 hopper, it is also necessary to the sawdust of the parts by weight be added.
Further, it in step c, shunts road junction and has one layer of 40 mesh~50 mesh sieve.
Further, in step d, each aperture spacing distance is 3mm~4mm.
Further, in step d, the depth in each aperture is 10 μm~12 μm.
The advantages of the present invention are:
1. the plastic film that one kind prepared by the present invention can be used in cutlery box inner surface uses lower-cost polythene material
It is prepared, there is excellent toughness, quality is reliable and stable；It is arranged in pairs or groups, is improved purple using purple sweet potato starch and sodium carboxymethylcellulose
The mechanical strength of China fir starch will improve the stability of purple sweet potato starch；
2. the plastic film that one kind prepared by the present invention can be used in cutlery box inner surface uses three-layer co-extruded preparation method, preparation
Film upper surface have equally distributed tiny aperture, can be absorbed by intermediate layer film with absorbed portion grease stain, avoid oil
Stain leakage, it is inconvenient to improve dining；Lower surface is closely pressed with mess-tin simultaneously, does not influence the high intensity and structure of mess-tin entirety
Stablize；
3. a kind of plastic film that can be used in cutlery box inner surface prepared in the application uses polyethylene and tea polyphenol raw materials,
Mess-tin internal environment can be improved, avoid bringing harmful substance into when in conjunction with food, guarantee human health, while tea polyphenols have
There is oxidation resistance, it is ensured that the freshness of food and delicious mouthfeel；
4. preparation process of the present invention is simple, short preparation period, optimizes each preparation parameter, overcome materials variance to reach
It is required that technical effect, can good coordination product quality and cost problem.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.Below in conjunction with embodiment, the present invention will be described in detail.
As background technology part is introduced, existing plastic film preparation is complicated at high cost, asks to solve this
Topic, the present invention provides a kind of plastic films that can be used in cutlery box inner surface.
Embodiment 1
A kind of plastic film used in cutlery box inner surface
Preparation can include: polyethylene with the raw material of the layer on the plastic film of cutlery box inner surface by weight
5000g, tea polyphenols 1000g, purple sweet potato starch 200g, p-hydroxybenzoate methyl esters 100g, sodium carboxymethylcellulose 200g；Preparation
Can be used in cutlery box inner surface plastic film middle layer raw material include: by weight polyethylene 5000g, tea polyphenols 1000g,
Purple sweet potato starch 200g, p-hydroxybenzoate methyl esters 100g, sodium carboxymethylcellulose 200g, sawdust 100g.
It is prepared via a method which:
The sodium carboxymethylcellulose of the parts by weight is configured to the solution that viscosity is 300mpas, institute is added by step a
The purple sweet potato starch of parts by weight is stated, under conditions of temperature is 60 DEG C, ultrasonic 1h obtains mixed solution；
The polyethylene of the parts by weight, tea polyphenols, the addition of p-hydroxybenzoate methyl esters are preheated to 85 by step b in advance
DEG C stirred tank in, stirred tank is warming up to 145 DEG C with the rate of 5 DEG C/min, and keeps 15min, later be added step a in gained
Mixed solution be stirred until homogeneous, obtain mixed material；
Mixed material obtained in step c, step b continues to be heated to 185 DEG C, when control water content is 10%, and respectively three
Group addition extruder the 1st, No. 2, in No. 3 hoppers, while in No. 2 hopper, it is also necessary to the sawdust of the parts by weight be added, squeeze
Machine screw rod after merging respectively, by runner, is extruded into the rotational speed of 400r/min by head annular die gap out
Thin-wall tube；
Step d, after extrusion, with compressed air by its inflation under flow regime, after being cooled to 10 DEG C of sizings, in the modeling
Expect that the upper surface of film carries out needle thorn, the tiny aperture being evenly distributed presss from both sides flat rear trimming and winds to obtain and can be used in cutlery box
The plastic film on surface.
In aforesaid operations, the sieve that road junction has one layer of 40 mesh is shunted；Each aperture spacing distance is 3mm, each aperture
Depth be 10 μm.
Embodiment 2
A kind of plastic film used in cutlery box inner surface
Preparation can include: polyethylene with the raw material of the layer on the plastic film of cutlery box inner surface by weight
6000g, tea polyphenols 1500g, purple sweet potato starch 400g, 150g parts of p-hydroxybenzoate methyl esters, sodium carboxymethylcellulose 400g；System
The standby raw material of the plastic film middle layer of cutlery box inner surface that can be used in includes: polyethylene 6000g, tea polyphenols by weight
1500g, purple sweet potato starch 400g, p-hydroxybenzoate methyl esters 150g, sodium carboxymethylcellulose 400g, sawdust 200g.
It is prepared via a method which:
The sodium carboxymethylcellulose of the parts by weight is configured to the solution that viscosity is 500mpas, institute is added by step a
The purple sweet potato starch of parts by weight is stated, under conditions of temperature is 65 DEG C, ultrasonic 2h obtains mixed solution；
The polyethylene of the parts by weight, tea polyphenols, the addition of p-hydroxybenzoate methyl esters are preheated to 90 by step b in advance
DEG C stirred tank in, stirred tank is warming up to 155 DEG C with the rate of 8 DEG C/min, and keeps 15min, later be added step a in gained
Mixed solution be stirred until homogeneous, obtain mixed material；
Mixed material obtained in step c, step b continues to be heated to 195 DEG C, when control water content is 15%, and respectively three
Group addition extruder the 1st, No. 2, in No. 3 hoppers, while in No. 2 hopper, it is also necessary to the sawdust of the parts by weight be added, squeeze
Machine screw rod after merging respectively, by runner, is extruded into the rotational speed of 600r/min by head annular die gap out
Thin-wall tube；
Step d, after extrusion, with compressed air by its inflation under flow regime, after being cooled to 15 DEG C of sizings, in the modeling
Expect that the upper surface of film carries out needle thorn, the tiny aperture being evenly distributed presss from both sides flat rear trimming and winds to obtain and can be used in cutlery box
The plastic film on surface.
In aforesaid operations, the sieve that road junction has one layer of 50 mesh is shunted；Each aperture spacing distance is 4mm, each aperture
Depth be 12 μm.
Embodiment 3
A kind of plastic film used in cutlery box inner surface
Preparation can include: polyethylene with the raw material of the layer on the plastic film of cutlery box inner surface by weight
5200g, tea polyphenols 1300g, purple sweet potato starch 260g, p-hydroxybenzoate methyl esters 120g, sodium carboxymethylcellulose 260g；Preparation
Can be used in cutlery box inner surface plastic film middle layer raw material include: by weight polyethylene 5200g, tea polyphenols 1300g,
Purple sweet potato starch 260g, p-hydroxybenzoate methyl esters 120g, sodium carboxymethylcellulose 260g, sawdust 120g.
It is prepared via a method which:
The sodium carboxymethylcellulose of the parts by weight is configured to the solution that viscosity is 400mpas, institute is added by step a
The purple sweet potato starch of parts by weight is stated, under conditions of temperature is 62 DEG C, ultrasonic 1.2h obtains mixed solution；
The polyethylene of the parts by weight, tea polyphenols, the addition of p-hydroxybenzoate methyl esters are preheated to 85 by step b in advance
DEG C stirred tank in, stirred tank is warming up to 148 DEG C with the rate of 6 DEG C/min, and keeps 15min, later be added step a in gained
Mixed solution be stirred until homogeneous, obtain mixed material；
Mixed material obtained in step c, step b continues to be heated to 188 DEG C, when control water content is 12%, and respectively three
Group addition extruder the 1st, No. 2, in No. 3 hoppers, while in No. 2 hopper, it is also necessary to the sawdust of the parts by weight be added, squeeze
Machine screw rod after merging respectively, by runner, is extruded into the rotational speed of 450r/min by head annular die gap out
Thin-wall tube；
Step d, after extrusion, with compressed air by its inflation under flow regime, after being cooled to 12 DEG C of sizings, in the modeling
Expect that the upper surface of film carries out needle thorn, the tiny aperture being evenly distributed presss from both sides flat rear trimming and winds to obtain and can be used in cutlery box
The plastic film on surface.
In aforesaid operations, the sieve that road junction has one layer of 40 mesh is shunted；Each aperture spacing distance is 3mm, each aperture
Depth be 10 μm.
Embodiment 4
A kind of plastic film used in cutlery box inner surface
Preparation can include: polyethylene with the raw material of the layer on the plastic film of cutlery box inner surface by weight
5800g, tea polyphenols 1400g, purple sweet potato starch 320g, p-hydroxybenzoate methyl esters 140g, sodium carboxymethylcellulose 320g；Preparation
Can be used in cutlery box inner surface plastic film middle layer raw material include: by weight polyethylene 5800g, tea polyphenols 1400g,
Purple sweet potato starch 320g, p-hydroxybenzoate methyl esters 140g, sodium carboxymethylcellulose 320g, sawdust 180g.
It is prepared via a method which:
The sodium carboxymethylcellulose of the parts by weight is configured to the solution that viscosity is 300mpas, institute is added by step a
The purple sweet potato starch of parts by weight is stated, under conditions of temperature is 65 DEG C, ultrasonic 1.6h obtains mixed solution；
The polyethylene of the parts by weight, tea polyphenols, the addition of p-hydroxybenzoate methyl esters are preheated to 90 by step b in advance
DEG C stirred tank in, stirred tank is warming up to 152 DEG C with the rate of 7 DEG C/min, and keeps 15min, later be added step a in gained
Mixed solution be stirred until homogeneous, obtain mixed material；
Mixed material obtained in step c, step b continues to be heated to 192 DEG C, when control water content is 13%, and respectively three
Group addition extruder the 1st, No. 2, in No. 3 hoppers, while in No. 2 hopper, it is also necessary to the sawdust of the parts by weight be added, squeeze
Machine screw rod after merging respectively, by runner, is extruded into the rotational speed of 550r/min by head annular die gap out
Thin-wall tube；
Step d, after extrusion, with compressed air by its inflation under flow regime, after being cooled to 14 DEG C of sizings, in the modeling
Expect that the upper surface of film carries out needle thorn, the tiny aperture being evenly distributed presss from both sides flat rear trimming and winds to obtain and can be used in cutlery box
The plastic film on surface.
In aforesaid operations, the sieve that road junction has one layer of 50 mesh is shunted；Each aperture spacing distance is 4mm, each aperture
Depth be 12 μm.
Embodiment 5
A kind of plastic film used in cutlery box inner surface
Preparation can include: polyethylene with the raw material of the layer on the plastic film of cutlery box inner surface by weight
5500g, tea polyphenols 1200g, purple sweet potato starch 300g, p-hydroxybenzoate methyl esters 120g, sodium carboxymethylcellulose 300g；Preparation
Can be used in cutlery box inner surface plastic film middle layer raw material include: by weight polyethylene 5500g, tea polyphenols 1200g,
Purple sweet potato starch 300g, p-hydroxybenzoate methyl esters 120g, sodium carboxymethylcellulose 300g, sawdust 150g.
It is prepared via a method which:
The sodium carboxymethylcellulose of the parts by weight is configured to the solution that viscosity is 400mpas, institute is added by step a
The purple sweet potato starch of parts by weight is stated, under conditions of temperature is 63 DEG C, ultrasonic 1.5h obtains mixed solution；
The polyethylene of the parts by weight, tea polyphenols, the addition of p-hydroxybenzoate methyl esters are preheated to 90 by step b in advance
DEG C stirred tank in, stirred tank is warming up to 150 DEG C with the rate of 6 DEG C/min, and keeps 15min, later be added step a in gained
Mixed solution be stirred until homogeneous, obtain mixed material；
Mixed material obtained in step c, step b continues to be heated to 190 DEG C, when control water content is 15%, and respectively three
Group addition extruder the 1st, No. 2, in No. 3 hoppers, while in No. 2 hopper, it is also necessary to the sawdust of the parts by weight be added, squeeze
Machine screw rod after merging respectively, by runner, is extruded into the rotational speed of 500r/min by head annular die gap out
Thin-wall tube；
Step d, after extrusion, with compressed air by its inflation under flow regime, after being cooled to 15 DEG C of sizings, in the modeling
Expect that the upper surface of film carries out needle thorn, the tiny aperture being evenly distributed presss from both sides flat rear trimming and winds to obtain and can be used in cutlery box
The plastic film on surface.
In aforesaid operations, the sieve that road junction has one layer of 50 mesh is shunted；Each aperture spacing distance is 3mm, each aperture
Depth be 11 μm.
Technical progress in order to further illustrate the present invention is now further illustrated using experimental example.
Experimental example 1
Experimental material: commercially available mess-tin, inner surface pressing, which have, is used in meal according to what the embodiment of the present invention 1~5 produced
The mess-tin of the plastic film of box inner surface.
Test method: the properties of more various mess-tins under square one.
The pressing of 1 inner surface of table has the plastic film used in cutlery box inner surface produced according to the embodiment of the present invention 1~5
Mess-tin performance compares
Can be seen that under identical circumstances by the above experimental example, inner surface pressing have according to the embodiment of the present invention 1~
The mess-tin of the plastic film used in cutlery box inner surface of 5 productions has preferable absorption grease stain performance, is avoided by absorption
Dining caused by grease stain flows out is inconvenient, has good fresh-keeping effect to food simultaneously, guarantees mouthfeel, and product stability
It is good, it is unlikely to deform.
Experimental example 2
Item compared: commercially available mess-tin and inner surface pressing have being used according to the production of the embodiment of the present invention 1~5
The degradation rate of the mess-tin of the plastic film of cutlery box inner surface.
Test method: the degradation rate of more various mess-tins under square one.
The pressing of 2. inner surface of table has the plastic film used in cutlery box inner surface produced according to the embodiment of the present invention 1~5
Mess-tin performance compare
| Material | It has degraded within 3 months ratio |
| Commercially available mess-tin | 75% |
| The mess-tin of inner surface pressing embodiment 1 | 82% |
| The mess-tin of inner surface pressing embodiment 2 | 88% |
| The mess-tin of inner surface pressing embodiment 3 | 89% |
| The mess-tin of inner surface pressing embodiment 4 | 90% |
| The mess-tin of inner surface pressing embodiment 5 | 85% |
It can be seen that the modeling used in cutlery box inner surface produced using preparation method of the invention by the above experimental example
Expect film, contains sawdust in raw material, the degradation rate of mess-tin can be accelerated, 3 months degradation rates are up to 82%, are more suitable for
It promotes the use of.
The above is only a preferred embodiment of the present invention and experimental example, is not intended to restrict the invention, for this field
Technical staff for, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made
What modification, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. the plastic film that one kind can be used in cutlery box inner surface, which is characterized in that the plastics used in cutlery box inner surface are thin
Film includes upper layer and middle layer composition；The upper surface of the plastic film used in cutlery box inner surface is distributed uniformly
Tiny aperture；It by weight can include: poly- second with the raw material of the layer on the plastic film of cutlery box inner surface described in preparation
50 parts~60 parts of alkene, 10 parts~15 parts of tea polyphenols, 2 parts~4 parts of purple sweet potato starch, 1 part~1.5 parts of p-hydroxybenzoate methyl esters,
2 parts~4 parts of sodium carboxymethylcellulose；The raw material of the plastic film middle layer of cutlery box inner surface can be used in described in preparation by weight
Meter includes: 50 parts~60 parts of polyethylene, 10 parts~15 parts of tea polyphenols, 2 parts~4 parts of purple sweet potato starch, p-hydroxybenzoate methyl esters 1
Part~1.5 parts, 2 parts~4 parts of sodium carboxymethylcellulose, 1 part~2 parts of sawdust.
2. the plastic film according to claim 1 used in cutlery box inner surface, cutlery box inner surface can be used in described in preparation
Plastic film on layer raw material include: by weight 55 parts of polyethylene, 12 parts of tea polyphenols, 3 parts of purple sweet potato starch, to hydroxyl
1.2 parts of yl benzoic acid ester methyl ester, 3 parts of sodium carboxymethylcellulose；It can be used among the plastic film of cutlery box inner surface described in preparation
The raw material of layer includes: 55 parts of polyethylene, 12 parts of tea polyphenols, 3 parts of purple sweet potato starch, p-hydroxybenzoate methyl esters by weight
1.2 parts, 3 parts of sodium carboxymethylcellulose, 1.5 parts of sawdust.
3. the plastic film according to claim 1 used in cutlery box inner surface, which is characterized in that described to be used in cutlery box
The upper and lower surface of the plastic film of inner surface and the thickness proportion of middle layer are 10 μm: 10 μm: 10 μm.
4. the plastic film according to claim 1 used in cutlery box inner surface, which is characterized in that the mesh number of the sawdust
For 200 mesh~300 mesh.
5. a kind of preparation method of the plastic film according to any one of claims 1 to 4 used in cutlery box inner surface,
Characterized by comprising the following steps:
The sodium carboxymethylcellulose of the parts by weight is configured to the solution that viscosity is 300mpas~500mpas by step a,
The purple sweet potato starch of the parts by weight is added, under conditions of temperature is 60 DEG C~65 DEG C, ultrasonic 1h~2h obtains mixed solution；
Step b, by the polyethylene of the parts by weight, tea polyphenols, p-hydroxybenzoate methyl esters addition be preheated in advance 85 DEG C~
In 90 DEG C of stirred tank, stirred tank is warming up to 145 DEG C~155 DEG C with 5 DEG C/min~8 DEG C/min rate, and keep 15min it
Mixed solution obtained in step a is added afterwards to be stirred until homogeneous, obtains mixed material；
Mixed material obtained in step c, step b continues to be heated to 185 DEG C~195 DEG C, respectively three groups of addition extruders the 1st
Number, No. 2, in No. 3 hoppers, extruder screw is with the rotational speed of 400r/min~600r/min, after merging respectively, by shunting
Road is extruded into thin-wall tube by head annular die gap；
Step d, after extrusion, with compressed air by its inflation under flow regime, after being cooled to 10 DEG C~15 DEG C sizings, described
The upper surface of plastic film carries out needle thorn, and the tiny aperture being evenly distributed, trimming, which winds to obtain, after folder is flat can be used in cutlery box
The plastic film of inner surface.
6. preparation method according to claim 5, which is characterized in that in step c, in the continuation heating process, control
When water content is 10%~15%, mixed material is divided equally and extruder is added.
7. preparation method according to claim 5, which is characterized in that in step c, in No. 2 hopper, it is also necessary to
The sawdust of the parts by weight is added.
8. preparation method according to claim 5, which is characterized in that in step c, the shunting road junction has one layer of 40 mesh
The sieve of~50 mesh.
9. preparation method according to claim 5, which is characterized in that in step d, each aperture spacing distance is
3mm~4mm.
10. preparation method according to claim 5, which is characterized in that in step d, the depth in each aperture is 10 μ
M~12 μm.
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| CN201910060571.7A CN109897258B (en) | 2019-01-22 | 2019-01-22 | Plastic film capable of being used on inner surface of lunch box and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112724624A (en) * | 2020-12-28 | 2021-04-30 | 生刚 | Full-biodegradable paper-plastic composite material and preparation method thereof |
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| US20180178496A1 (en) * | 2013-12-20 | 2018-06-28 | E I Du Pont De Nemours And Company | Selectively permeable ethylene copolymer compositions |
| CN208031011U (en) * | 2017-06-16 | 2018-11-02 | 珠海得米新材料有限公司 | A kind of food pad |
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| JPH0679834A (en) * | 1992-09-01 | 1994-03-22 | Mitsubishi Plastics Ind Ltd | Antibacterial laminated film |
| JPH11320726A (en) * | 1998-05-13 | 1999-11-24 | Yoshio Oyama | Film sheet, packaging material for cooking food and drink, food and drink package and their manufacture |
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| CN103265730A (en) * | 2013-05-23 | 2013-08-28 | 苏州富通高新材料科技股份有限公司 | Degradable film containing starch and preparation method of degradable film |
| US20180178496A1 (en) * | 2013-12-20 | 2018-06-28 | E I Du Pont De Nemours And Company | Selectively permeable ethylene copolymer compositions |
| CN208031011U (en) * | 2017-06-16 | 2018-11-02 | 珠海得米新材料有限公司 | A kind of food pad |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112724624A (en) * | 2020-12-28 | 2021-04-30 | 生刚 | Full-biodegradable paper-plastic composite material and preparation method thereof |
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| CN109897258B (en) | 2021-05-07 |
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