CN102502110A - Vegetable and fruit plastic packaging box - Google Patents
Vegetable and fruit plastic packaging box Download PDFInfo
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- CN102502110A CN102502110A CN2011103101602A CN201110310160A CN102502110A CN 102502110 A CN102502110 A CN 102502110A CN 2011103101602 A CN2011103101602 A CN 2011103101602A CN 201110310160 A CN201110310160 A CN 201110310160A CN 102502110 A CN102502110 A CN 102502110A
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Abstract
The invention discloses a vegetable and fruit plastic packaging box. The packaging box comprises a box body and a box cover, wherein the box body at least comprises a breathable plastic film layer A, a heat sealing plastic film layer B and a bonding plastic film layer C, the bonding plastic film layer C is arranged between the breathable plastic film layer A and the heat sealing plastic film layer B, and the box body is extruded by a co-extruder and is formed after being stretched; the box cover comprises a surface layer D and a plurality of co-extrusion film layers E; and the surface layer D is connected with the co-extrusion film layers E through connecting layers F. The packaging box has the characteristics of good fresh keeping effect, long fresh keeping time, simple structure, easy processing and using and low cost.
Description
Technical field
The present invention relates to packing box, be specifically related to a kind of vegetables and fruits plastic packing box.
Background technology
Fruits and vegetables will get into the circulation of merchandizing big market, certainly exist a currency, and the present currency in China still can not be satisfied fruits and vegetables circulation requirement.China railways, the transportation of highway express mail fresh food 2～3 days at least, 5～6 days at most.And most of freshs fruit of vegetables freshness date is very short at normal temperatures, leafy vegetables 1～2 day, stem class dish 2～3 days, root class dish 5～8 days, fruit then is 3～15 days.China's actual circulation cycle request fruits and vegetables must have 8～10 days freshness date.According to the data display of National Development and Reform Committee in 2010, China's yield of vegetables accounts for 60% of global total make at present, and fruit accounts for 30%.But the annual loss of fruits and vegetables just reaches more than 1,000 hundred million yuan, wherein stores and transports the loss that disease causes and accounts for main portion.And in some developed countries, the fruits and vegetables rotten loss rate that circulates generally is merely 5%-6%.
The material that present China is used for the vegetables packing mainly is basket, wooden case, the corrugated fibre box of compiling with natural plant materials such as bamboo, the twigs of the chaste tree, and the market retail is not almost packed.The packing of fruit is also similar with vegetables, the most exquisite wraps up in bag one deck paper in the fruit appearance only, plays the physical protection effect, does not have obvious help for the life-saving cycle.Therefore, be necessary the structure and the material of existing fruit tree packing box are improved.
Summary of the invention
The objective of the invention is to overcome the defective that exists in the prior art, design a kind of good refreshing effect, fresh keeping time is long, and is simple in structure, is easy to processing, is easy to use fruits and vegetables plastics crisper with low cost.
For realizing above-mentioned purpose; Technical scheme of the present invention is a kind of vegetables and fruits plastic packing box of design; It is characterized in that said packing box is made up of box body, lid, described box body comprises the A layer with breathable plastics film, the B layer of heat-sealing plastic film and the C layer of adhered plastics film at least; Wherein the C layer of adhered plastics film is between the B layer of the A of plastic film layer and heat-sealing plastic film, and above-mentioned box body pushes drawn aftershaping again through co-extrusion machine; Said lid comprises surperficial D layer and PP TYPE E layer, and said surperficial D layer connects through being connected the F layer with PP TYPE E layer.
Optimized technical scheme is that the A layer initial fusion temperature of said plastic film is higher at least 5 degrees centigrade than the B layer initial fusion temperature of said heat-sealing plastic film; The A layer of said plastic film is polymeric type plastics and/or copolymerization class plastics with the B layer of heat-sealing plastic film.
Further optimized technical scheme also has; The A layer of said plastic film is polypropylene and/or polyamide and/or polystyrene and/or polyesters; The B layer of said heat-sealing plastic film is poly-vinyl and/or ethylene-vinyl acetate copolymer, and the C layer of said adhered plastics film is a resin.
Further optimized technical scheme also has, and the C layer of said adhered plastics film is single resin or is the mixing of some kinds of resins.
Further optimized technical scheme also has, and the C layer thickness of said adhered plastics film accounts for 10%～60% of coextruded film gross thickness.
The technical scheme of choosing comprises that also it is characterized in that, said surperficial D layer is the biaxial stretching polyester film, bidirectional stretching polypropylene film, a kind of in paper or the biaxial tension nylon membrane.
Further optimized technical scheme also has, promising at least five-layer co-squeezing blown film of said PP TYPE E layer or cast film.
Further optimized technical scheme also has; Said surperficial D layer is connected through complex method with PP TYPE E layer, and said complex method comprises that dry type is compound, or extrudes compound; Connection F layer during said dry type is compound is an adhesive layer, and the said connection F layer of extruding in compound is the binding resin layer.
Further optimized technical scheme also has; In said PP TYPE E layer, contain one or more layers of barrier material; Requiring of the thickness of said barrier material and barrier property is proportional, and said barrier material is nylon or polyethylene vinyl acetate ester copolymer or polyvinylidene chloride.
Further optimized technical scheme also has, and on the inner layer surface of said surperficial D layer, can be printed with the picture-character information layer.
The breathing fresh keeping principle of fruits and vegetables is
The respiratory activity of fruits and vegetables is under the effect of enzyme, complex compound to be decomposed into simple material, the process that finally becomes CO2 and water and release energy.When fruits and vegetables were stored at the sufficient environment of oxygen, what carry out was aerobic respiration, promptly in the presence of oxygen with body in organic substance oxidative breakdown such as glucose become CO2 and water, produce heat simultaneously.Its expression formula is expressed as:
C
6H
12O
6+6O
2→6CO
2+6H
2O+2822kJ
What fruits and vegetables carried out when in anaerobic environment, storing is anaerobic respiration, keeps respiratory activity by decomposition glucose, produces a large amount of ethanol, CO2 and less energy.Its expression formula can be expressed as:
C
6H
12O
6→2C
2H
6O+2CO
2+117kJ
Anaerobic respiration also can produce materials such as acetaldehyde, ethene, and they have dematuration to fruits and vegetables, and are totally unfavorable to storing.
Packaging bag should be able to be regulated the ratio of a bag interior temperature, humidity and all gases.The fresh-keeping environment that requires low oxygen, high carbon dioxide, the respiratory intensity that can slow down fruits and vegetables like this makes it and is in " hibernation " state, can suppress the breeding of various moulds simultaneously again.The respiratory intensity of slowing down fruits and vegetables makes it and is in " hibernation " state, must control CO2 and concentration of oxygen in the storage environment well, makes it can either guarantee that fruits and vegetables breathe, and keeps the continuity of its life, controls again and slows down its respiratory intensity.General concentration of carbon dioxide is controlled at 10% can suppress respiratory intensity when following, and too high meeting causes respiratory disorder, even poisoning.Oxygen concentration is being anoxic below 1%, generally is controlled at the breathing that can slow down fruits and vegetables at 2%～10% o'clock.In addition, vegetable and fruit packaging must have moisture retention, can not form water droplet again, but forms the layer of even moisture film at inside face, is beneficial to and prevents germ reproduction.
Advantage of the present invention and beneficial effect are: the coextruded film in this vegetables and fruits plastic packing box had both had air permeability and good, was easy to the moulding that is stretched again.And the epiphragma of composite structure only needs to be formed through once-combined by double-layer films, and technology is simple, and loss is few, and integrated cost is low.Two-layer complementing one another in this composite structure epiphragma; The skin-material layer is that epiphragma provides good deflection and mechanical property; The top layer all is good printable fabric simultaneously; Can make the epiphragma material with fine-printed effect, the India side formula can avoid packing material directly to contact with printing ink in the employing, ensures safety.The radical function of multi-layer co-extruded material layer is for epiphragma provides enough obstructing capacities, guarantees the shelf life of packing material, uses as the hot sealing layer material simultaneously.In multi-layer co-extruded material,, avoid the not enough or excessive packaging of barrier according to the kind and the content of operating needs setting barrier material.Further, make full use of multi-layer co-extruded advantage, the design through the hot sealing layer material in co-extrusion, can also make can with the epiphragma material of moulding base material heat-sealing not of the same race, also can make and have the epiphragma that is prone to take off effect.This new structure design has made full use of the advantage of skin-material and multi-layer co-extruded method, can reduce the thickness of epiphragma greatly, reduces the raw-material use amount of petrochemical industry, realizes the minimizing and sustainableization of packing.
Description of drawings
Fig. 1 is the structural representation of vegetable and fruit packaging box of the present invention;
Fig. 2 is the laminar texture scheme drawing of box body among the present invention;
Fig. 3 is the laminar texture scheme drawing of lid among the present invention;
Fig. 4 is the structural representation of the embodiment of the invention 1;
Fig. 5 is the structural representation of the embodiment of the invention 2;
Fig. 6 is the structural representation of the embodiment of the invention 3;
Fig. 7 is the structural representation of the embodiment of the invention 4;
Fig. 8 is the structural representation of the embodiment of the invention 5;
Fig. 9 is the structural representation of the embodiment of the invention 6;
Figure 10 is the structural representation of the embodiment of the invention 7;
Figure 11 is the structural representation of the embodiment of the invention 8;
Figure 12 is the structural representation of the embodiment of the invention 9;
Figure 13 is the structural representation of the embodiment of the invention 10;
Figure 14 vegetable and fruit packaging box of the present invention packaged for processing process flow scheme drawing.
In the literary composition and among the figure:
| The English abbreviation | The Chinese full name |
| PP | Polypropylene |
| PA | Polyamide (nylon) |
| PE | Poly-vinyl |
| EVA | Ethylene-vinyl acetate copolymer |
| PVDC | Polyvinylidene chloride |
| EVHO | The ethene-vinyl acetate alcohol copolymer |
| HOPP | HOPP |
| COPP | COPP |
| P | A layer plastic film |
| Sealing | B layer heat-sealing plastic film |
| Tie | C layer adhered plastics film |
| The English abbreviation | The Chinese full name |
| EVA | Ethylene-vinyl acetate copolymer |
| EVOH | Ethylene-vinyl alcohol copolymer |
| PE | Poly-vinyl |
| LDPE | LDPE |
| PA | Polyamide (nylon) |
| SURLYN | Ionomer |
| ADH | Adhesion agent |
| Tie | Binding resin |
| Ink | Lettering (printed layers) |
| E | Multi-layer co-extruded film |
| D | The top layer |
| F | Articulamentum |
| Lid | Epiphragma |
| Paper | Paper |
| PP | Polypropylene |
| CPP | Cast polypropylene |
| AL | Aluminium foil |
| PE-Easy?peel | Has the PE layer that is prone to take off effect |
| BOPET | The biaxial stretching polyester film |
| BOPP | Bidirectional stretching polypropylene film |
| BOPA | The biaxial tension nylon membrane |
The specific embodiment
Below in conjunction with accompanying drawing and embodiment, specific embodiments of the invention further describes.Following examples only are used for technical scheme of the present invention more clearly is described, and can not limit protection scope of the present invention with this.
Shown in accompanying drawing 1; The present invention is a kind of vegetables and fruits plastic packing box; This packing box is made up of box body 1, lid 2; Described box body comprises the A layer 1-1 with breathable plastics film, the B layer 1-2 of heat-sealing plastic film and the C layer 1-3 of adhered plastics film at least, and wherein the C layer 1-3 of adhered plastics film is between the B layer 1-2 of the A of plastic film layer 1-2 and heat-sealing plastic film, and above-mentioned box body pushes drawn aftershaping again through co-extrusion machine; Said lid 2 comprises surperficial D layer 2-1 and PP TYPE E layer 2-2, and said surperficial D layer 2-1 connects through being connected F layer 2-3 with PP TYPE E layer 2-2.
Embodiment preferred is in the present invention, and the A layer 1-1 initial fusion temperature of said plastic film is higher at least 5 degrees centigrade than the B layer 1-2 initial fusion temperature of said heat-sealing plastic film; The A layer 1-1 of said plastic film and the B layer 1-2 of heat-sealing plastic film are polymeric type plastics and/or copolymerization class plastics.
Further preferred embodiment also has in the present invention; The A layer 1-1 of said plastic film is polypropylene and/or polyamide and/or polystyrene and/or polyesters; The B layer 1-2 of said heat-sealing plastic film is poly-vinyl and/or ethylene-vinyl acetate copolymer, and the C layer 1-3 of said adhered plastics film is resin.
Further preferred embodiment also has in the present invention, and the C layer 1-3 of said adhered plastics film is single resin or is the mixing of some kinds of resins.
Further optimized technical scheme also has in the present invention, and the C layer 1-3 thickness of said adhered plastics film accounts for 10%～60% of coextruded film gross thickness.
The embodiment of choosing comprises that also said surperficial D layer 2-1 is the biaxial stretching polyester film in the present invention, bidirectional stretching polypropylene film, a kind of in paper or the biaxial tension nylon membrane.
Further preferred embodiment also has in the present invention, promising at least five-layer co-squeezing blown film of said PP TYPE E2-2 layer or cast film.
Further preferred embodiment also has in the present invention; Said surperficial D layer 2-1 is connected through complex method with PP TYPE E layer 2-2; Said complex method comprises that dry type is compound; Or extrude compoundly, and the connection F layer 2-3 during said dry type is compound is adhesive layer, the said connection F layer 2-3 that extrudes in compound is the binding resin layer.
Further preferred embodiment also has in the present invention; In said PP TYPE E layer 2-2, contain one or more layers of barrier material; Requiring of the thickness of said barrier material and barrier property is proportional, and said barrier material is nylon or polyethylene vinyl acetate ester copolymer or polyvinylidene chloride.
Further preferred embodiment also has in the present invention, on the inner layer surface of said surperficial D layer 2-1, can be printed with the picture-character information layer.
Embodiment 1:
As shown in Figure 4; Present embodiment is 7 layers of co-extrusion membrane structure of box body; Wherein the C layer 1-3 thickness of adhered plastics film accounts for 35% of gross thickness, and gross thickness is 125 microns, and its permeability to air is 1300 a milliliters/sq m. day .1 barometric pressure; The B layer of heat-sealing plastic film is selected metallocene PE for use, and the A layer 1-1 of plastic film is HOPP (HoPP).Can pass through the moulding of coextrusion film blowing manufactured.
Embodiment 2:
As shown in Figure 5; Present embodiment is 8 layers of coextruded structure of box body; Wherein the thickness of C layer 1-3 adhered plastics film accounts for 45% of gross thickness; Its permeability to air is 1100 a milliliters/sq m. day .1 barometric pressure, and the B layer of heat-sealing plastic film adopts density to be lower than the ultra-low density polyethylene of 0.890 gram/cm3, and the 1-1 of A layer plastic film selects COPP (CoPP) for use.Can pass through the moulding of coextrusion film blowing manufactured.
Embodiment 3:
As shown in Figure 6; Present embodiment is 5 layers of coextruded structure of box body; Wherein the C layer 1-3 thickness of adhered plastics film accounts for 20% of gross thickness, and gross thickness is 100 microns, and its permeability to air is 500 a milliliters/sq m. day .1 barometric pressure; B layer heat-sealing plastic film is selected ethylene-vinyl acetate copolymer (EVA) for use, and the A layer of plastic film is selected polyamide (PA) for use.Can pass through the moulding of coextrusion casting manufactured.
Embodiment 4:
As shown in Figure 7; Present embodiment is 3 layers of coextruded structure of box body; Wherein the C layer 1-3 of adhered plastics film is polypropylene (PP) and the elastomeric blend of polypropylene (PP), and gross thickness is 60 microns, and its permeability to air is 5800 a milliliters/sq m. day .1 barometric pressure; The B layer of heat-sealing plastic film is selected ethylene-vinyl acetate copolymer (EVA) for use, and the A layer of plastic film is selected polypropylene (PP) for use.Can pass through the moulding of coextrusion film blowing manufactured.
Embodiment 5:
As shown in Figure 8; Present embodiment is 3 layers of coextruded structure of box body; Wherein air-permeable layer is polypropylene (PP) and the elastomeric blend of polypropylene (PP), and gross thickness is 40 microns, and its permeability to air is 6800 a milliliters/sq m. day .1 barometric pressure; The B layer of heat-sealing plastic film is poly-vinyl (PE), and the A layer of plastic film is polypropylene (PP).Can make moulding through the coextruding method blown film.
Embodiment 6:
Structure shown in accompanying drawing 9: surperficial D layer 2-1 is that BOPET prints; Compound through dry type compound with E layer 2-2 PP TYPE; The E layer of PP TYPE is the seven-layer co-extrusion film; Wherein contain the EVOH barrier layer, wherein the thickness of E layer is 40～60 microns, and wherein the thickness of barrier layer EVOH can be set at the 5-15 micron according to the requirement of barrier property.This structure epiphragma had both had good planeness and heat-sealing ability, had and had enough obstructing capacities.
Embodiment 7:
Structure shown in accompanying drawing 10: surperficial D layer 2-1 is that BOPET prints; Compound through dry type compound with E layer PP TYPE, the E layer of PP TYPE is eight layers of coextruded film, wherein contains EVOH barrier layer and PA barrier layer; Wherein three layers of PA material make epiphragma promptly have excellent barrier property; Have very excellent anti-puncture ability and pulling strengrth again, can be applicable to packing requirements, the hot sealing layer of coextruded film is designed with is prone to take off function simultaneously than in the higher packing; Make epiphragma also have the effect that is prone to take off, make things convenient for the customer to use.This structural cover can have obstructing capacity concurrently, resists puncture and is prone to take off effect, and the gross thickness of epiphragma can be controlled in below 80 microns, can make the integrated cost of epiphragma significantly reduce.
Embodiment 8:
Structure shown in accompanying drawing 11: surperficial D layer 2-1 is that BOPET prints; Compound compound through extruding with E layer 2-2 PP TYPE; The E layer of PP TYPE is nine layers of coextruded film, wherein contains EVOH barrier layer and PA barrier layer, and wherein two-layer PA material makes epiphragma promptly have excellent barrier property; Have very excellent anti-puncture ability and pulling strengrth again, can be applicable to packing requirements than in the higher packing.This structural cover can have obstructing capacity concurrently, anti-puncture and softness, and the gross thickness of epiphragma can be controlled in below 60 microns, can make the integrated cost of epiphragma significantly reduce.
Embodiment 9:
Structure shown in accompanying drawing 12: surperficial D layer 2-1 is BOPP; Need not print, compound through dry type compound with E layer PP TYPE, the E layer of PP TYPE is the five-layer co-squeezing film; Wherein contain the PA barrier layer; The PA material makes epiphragma promptly have barrier property preferably simultaneously, has very excellent anti-puncture ability and pulling strengrth again, and other layer constitutes by PP.The advantage one of the epiphragma of this structure is to carry out involution with the PP bottom substrate, the 2nd, but can make the epiphragma material of digestion resistant.
Embodiment 10:
Structure shown in accompanying drawing 13: surperficial D layer 2-1 is that paper carries out surface printing; Compound through dry type compound with E layer PP TYPE, the E layer of PP TYPE is nine layers of coextruded film, wherein contains the EVOH barrier layer; Hot sealing layer with coextruded film is designed to EVA simultaneously; Make epiphragma have can with the PE base material, the heat-sealing of the formed body of PP base material or PS base material has usability widely.
Of Figure 14, this vegetables and fruits plastic packing box also can be realized vacuum packaging or the filling with inert gas or the nitrogen of fruits and vegetables through wrapping machine.Vacuum-packed main effect is guaranteed the quality except that the deoxygenation that vacuum packaging possessed the function, mainly also has resistance to compression, choke, effect such as fresh-keeping, can more effectively make long-term original color, shape and the nutritive value of keeping of food.Have in addition that numerous food product is suitable to be adopted vacuum-packed and must adopt gas flush packaging,, have the higher meeting of sharp corners or hardness to puncture the food etc. of packaging bag like crisp friable food product.Food is behind vacuumizing-inflating packing, and inflation pressure can prevent effectively that greater than the outer atmospheric pressure of packaging bag food pressurized breaking deformation from not influencing packing box outward appearance and printing decoration in the packing box.Unreactable gas in the vegetable and fruit packaging box plays packing action, makes to keep malleation in the bag, gets in the box to prevent the box outer air, and food is played a protective effect.Among the figure: 4 is that preheating device, 5 is that heating arrangement, 6 is that filling packed article mechanism, 7 is that chopping machine, 8 is that charging blower, 9 is that shoutoff mechanism, 10 is that packed products, 11 is a belt conveyor.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from know-why of the present invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (10)
1. vegetables and fruits plastic packing box; It is characterized in that; Said packing box is made up of box body, lid; Described box body comprises the A layer with breathable plastics film, the B layer of heat-sealing plastic film and the C layer of adhered plastics film at least, and wherein the C layer of adhered plastics film is between the B layer of the A of plastic film layer and heat-sealing plastic film, and above-mentioned box body pushes drawn aftershaping again through co-extrusion machine; Said lid comprises surperficial D layer and PP TYPE E layer, and said surperficial D layer connects through being connected the F layer with PP TYPE E layer.
2. vegetables and fruits plastic packing box as claimed in claim 1 is characterized in that, the A layer initial fusion temperature of said plastic film is higher at least 5 degrees centigrade than the B layer initial fusion temperature of said heat-sealing plastic film; The A layer of said plastic film is polymeric type plastics and/or copolymerization class plastics with the B layer of heat-sealing plastic film.
3. vegetables and fruits plastic packing box as claimed in claim 2; It is characterized in that; The A layer of said plastic film is polypropylene and/or polyamide and/or polystyrene and/or polyesters; The B layer of said heat-sealing plastic film is poly-vinyl and/or ethylene-vinyl acetate copolymer, and the C layer of said adhered plastics film is a resin.
4. vegetables and fruits plastic packing box as claimed in claim 3 is characterized in that, the C layer of said adhered plastics film is single resin or is the mixing of some kinds of resins.
5. like any described vegetables and fruits plastic packing box in the claim 2 to 4, it is characterized in that the C layer thickness of said adhered plastics film accounts for 10%～60% of coextruded film gross thickness.
6. vegetables and fruits plastic packing box as claimed in claim 1 is characterized in that, said surperficial D layer is the biaxial stretching polyester film, bidirectional stretching polypropylene film, a kind of in paper or the biaxial tension nylon membrane.
7. vegetables and fruits plastic packing box as claimed in claim 6 is characterized in that, promising at least five-layer co-squeezing blown film of said PP TYPE E layer or cast film.
8. vegetables and fruits plastic packing box as claimed in claim 7; It is characterized in that; Said surperficial D layer is connected through complex method with PP TYPE E layer, and said complex method comprises that dry type is compound, or extrudes compound; Connection F layer during said dry type is compound is an adhesive layer, and the said connection F layer of extruding in compound is the binding resin layer.
9. vegetables and fruits plastic packing box as claimed in claim 8; It is characterized in that; In said PP TYPE E layer, contain one or more layers of barrier material; Requiring of the thickness of said barrier material and barrier property is proportional, and said barrier material is nylon or polyethylene vinyl acetate ester copolymer or polyvinylidene chloride.
10. like any described vegetables and fruits plastic packing box in the claim 6 to 9, it is characterized in that, on the inner layer surface of said surperficial D layer, can be printed with the picture-character information layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103101602A CN102502110A (en) | 2011-10-14 | 2011-10-14 | Vegetable and fruit plastic packaging box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103101602A CN102502110A (en) | 2011-10-14 | 2011-10-14 | Vegetable and fruit plastic packaging box |
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| Publication Number | Publication Date |
|---|---|
| CN102502110A true CN102502110A (en) | 2012-06-20 |
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ID=46214263
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|---|---|---|---|
| CN2011103101602A Pending CN102502110A (en) | 2011-10-14 | 2011-10-14 | Vegetable and fruit plastic packaging box |
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Cited By (5)
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| CN104176305A (en) * | 2014-08-22 | 2014-12-03 | 江西绿萌分选设备有限公司 | Full-automatic fruit bagging machine |
| CN110370739A (en) * | 2019-08-07 | 2019-10-25 | 浙江金石包装有限公司 | A kind of packing film and preparation method thereof |
| CN110423404A (en) * | 2019-07-29 | 2019-11-08 | 上海久升吸塑有限公司 | A kind of pad pasting box and its preparation process |
| CN110744906A (en) * | 2019-10-25 | 2020-02-04 | 江阴升辉包装材料有限公司 | Air-conditioning hard cover film and production process thereof |
| CN113211914A (en) * | 2021-03-26 | 2021-08-06 | 昆山运城塑业有限公司 | Three-layer co-extrusion double-drawing film of PP (polypropylene) and nylon and preparation method thereof |
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| CN110423404B (en) * | 2019-07-29 | 2022-06-28 | 上海久升吸塑有限公司 | Film pasting box and preparation process thereof |
| CN110370739A (en) * | 2019-08-07 | 2019-10-25 | 浙江金石包装有限公司 | A kind of packing film and preparation method thereof |
| CN110744906A (en) * | 2019-10-25 | 2020-02-04 | 江阴升辉包装材料有限公司 | Air-conditioning hard cover film and production process thereof |
| CN113211914A (en) * | 2021-03-26 | 2021-08-06 | 昆山运城塑业有限公司 | Three-layer co-extrusion double-drawing film of PP (polypropylene) and nylon and preparation method thereof |
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Application publication date: 20120620 |