CN1535814A - PVDC laminated composite high-temp-resistant steamed and boiled food packaging film and its preparation method - Google Patents
PVDC laminated composite high-temp-resistant steamed and boiled food packaging film and its preparation method Download PDFInfo
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- CN1535814A CN1535814A CNA031261140A CN03126114A CN1535814A CN 1535814 A CN1535814 A CN 1535814A CN A031261140 A CNA031261140 A CN A031261140A CN 03126114 A CN03126114 A CN 03126114A CN 1535814 A CN1535814 A CN 1535814A
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Abstract
The present invention relates to a PVDC laminated composite high-temp.-resistant cooked food packaging film and its preparation method. Its intermediate layer PVDC (chlorovinylidene and vinyl chloride copolymer) is respectively connected with two layers of two sides by means of binder, the described binder is a double-component polyurethane type solvent-free binder. The product can be produced by adopting said double-component polyurethane type solvent-free binder combination process and utilizing solvent-free combining machine. Said invented packaging film can meet the requirements for cooking above 121 deg.C.
Description
Technical field
The present invention relates to a kind of packaging films for food products, relate in particular to a kind of PVDC lamination complex fire resistant cooking food packaging film, also relate to a kind of method for preparing this PVDC lamination complex fire resistant cooking food packaging film simultaneously.
Background technology
Meat product is the important channel of human panning protein, fat, mineral matter, account for more than 30% of human food's consumption expenditure, therefore meat product industry accounts for critical positions in food industry, meat product industry comprise butcher, the processing of refrigeration, various meat products, except that the edible raw meat of few kind and indivedual local people, most meat packing technologies can be divided into high temperature sterilization (more than 121 ℃) under pasteurize under the normal pressure (80---85 ℃) and the high pressure.The purpose of pasteurize is to kill enzyme and the virus that in the meat people is had pathogenic effects under the normal pressure, prevents the edible back of people food poisoning, makes meat obtain shortening simultaneously; The purpose of high pressure, high temperature sterilization is all bacteriums and the spore that kills in the meat, stops bacteria live and breeding, prevents the meat product corruption, so cooked meat product must could be realized long term storage through high temperature high pressure sterilizing after packing.
Therefore, the packaging material that are used for the meat product of digestion resistant, anti-storage must possess following condition:
1, can bear under 121 ℃ of temperature boiling 40 minutes, not deform inside and outside the packaging bag, heat-sealing place is not ftractureed, and interlayer does not separate, and mechanical strength, barrier do not reduce.
2, oxygen, water vapour, food flavor, flavoring fragrance etc. there is very high barrier.
3, mechanical strength is good, is applicable to that various package packing machinies, bag machinery use.
4, heat sealability is good, easily seals and higher heat seal strength arranged.
5, chemical stability is good, with acid, alkali, salt, solvent, grease chemical reaction does not take place.
6, meet the food hygiene requirement, nontoxic to the people.
The lamination laminated film that present flexible package field at home only is the intermediate layer with the aluminium foil just can reach this requirement, its structure is biaxially oriented polyester film/bonding agent/lead foil/bonding agent/cast polypropylene film, this foil laminated film outward appearance is beautiful, the rejection rate height, can bear thermophilic digestion more than 121 ℃, but there is following shortcoming: the one, aluminium foil is subjected to fold to fracture, occur crackle easily, the barrier forfeiture; The 2nd, opaque, the consumer can't see inner package, inconvenient purchase of customer; The 3rd, pliability is not enough, can not closely be attached on the packaged article, and air pocket is many in the bag, is unfavorable for fresh-keeping; The 4th, can not use heating using microwave; The 5th, cost is higher.
The producer that current Chinese market, some management philosophy are not rectified utilizes opaque packing to hide product defects, the deception consumer, and consumers in general deeply hurt, in recent years In Aluminium Foil Packing meat product slack market on the market.But the packaging film that makes with general plastics (polyester/adhesive linkage/polypropylene) is though the transparency is good at present, can bear 121 ℃ of boilings under the temperature, but rejection rate is very low, can not reach the requirement of long-term storage under the normal temperature.China's ground spoke is vast, various places economic development imbalance, and grown place and area of consumption distance are far away, and it is simple and crude that the field of circulation is sold marketing facility, little complete cold chain except that the big city.Therefore, require cooked meat product to deposit enough shelf-lifves at normal temperatures, be badly in need of a kind of transparently fully, digestion resistant in the market, the high-barrier packaging material that meat products is guaranteed the quality more than six months at normal temperatures occurs.
At present, the high pressure resistant Tropical cooking film present situation on product of high-barrier is as follows in the world:
The PVDC film is the film of making through special film-blowing process with the copolymer of vinylidene chloride and vinyl chloride with high separating performance, and rejection rate is less than cm
325.4 μ m/m
224h23 ℃, have good mechanical performance and heat sealability, high temperature resistant 140 ℃, low temperature resistant-60 ℃, higher percent thermal shrinkage is arranged after being heated, stable chemical performance, not with various soda acid salt generation chemical reactions, anti-solvent, grease resistance, food hygiene is functional, and is nontoxic to human body, in order to bring into play the high temperature resistant and high obstructing performance of PVDC, people wish it is used as the intermediate layer always, make the lamination laminated film, are used as transparent, digestion resistant, store the meat product packaging material of guaranteeing the quality for a long time at normal temperatures.The preparation method that male works " basis of high-temperature cooking food and application " (first edition on June 10 nineteen ninety-five) has been introduced this composite is managed in Japan scholar clear water tide, Hengshan Mountain:
(1) product structure, PET/PVDC/CPP
Wherein, top layer PET (polyester film);
It between top layer and intermediate layer, intermediate layer and the nexine adhesive layer of 2 digestion resistants;
The intermediate layer is the PVDC film;
Nexine (hot sealing layer) CPP film (cast polypropylene film).
(2) manufacture method:
Adopt composite dry process, three layers of laminated film are finished in two steps:
The first step: solid adhesive is added that the solvent of appointment fully dissolves becomes rare colloidal liquid, pour in the adhesive coating pan of dry method compounding machine, with base material I (PET) uncoiling, through coater unit adhesive is evenly spread upon film surface, the film that will be coated with is sent in the heating furnace heating (70 ℃---90 ℃) solvent is evaporated to a certain degree again, pass through recombiner unit then base material I I (PVCD) evenly is pressed on the PET, thereby form one.Owing to still have certain solvent to exist in the adhesive, very easily peel off for two-layer, in order to improve bonding strength, the film volume after compound is sent into (50-55 ℃) in the heating clamber immediately, the heating regular hour (more than 72 hours), treat that cohesive force reaches that to carry out for second step after qualified more compound.
Second step: compound double-layer films PET/PVDC is made base material, at not compound PVCD one side coating adhesive, by the process of the first step CPP is compounded on the PVDC, send into heating clamber then, being heated to the regular hour reaches enough peel strengths, and combination process is just finished.
Because use solvent type adhesive, interlaminar bonding power depends on solvent evaporates degree in the tack coat, for solvent flashing, film will be at a certain temperature long-time heating repeatedly, thereby every layer film all must have enough temperature tolerances and very little percent thermal shrinkage.Can both reach these requirements for PET, BOPP, CPP, PVDC is a material that percent thermal shrinkage is very high only, as Saran 2032 under 100 ℃ of temperature, vertical percent thermal shrinkage 28-30%, horizontal percent thermal shrinkage 22-24%, as the intermediate layer, it is compound to use composite dry process to carry out at all with the PVDC film of high shrinkage like this, and therefore this method is difficult for being accepted.
In order to use composite dry process, do the intermediate layer with PVDC, make laminated film, just must drop to the percent thermal shrinkage of PVDC film very lowly, promptly under the compound heating-up temperature of dry method, the same PET of its shrinkage factor, CPP are identical.Japanese enterprises has been developed a kind of pre-contraction treatment process, the PVDC film is heated to 90 ℃, it is fully shunk, cool to room temperature then, when pre-contraction was heated, the both sides of film must clamp, so the cooling rear film is inhomogeneous in horizontal thickness, must be with the even place excision of the became uneven of the about 15-20% in both sides, thickness film even, that percent thermal shrinkage is consistent is write in reply and is share in the middle of only staying.To throw away 30-40% through pre-shrunk PVDC film,, even surpass aluminium foil so the compound PVDC laminating composite film cost of dry method is very high; Compound will repeatedly finishing in this technology through heating repeatedly, time-consuming, production efficiency is low, and energy consumption is big, process-cycle is long, the a large amount of solvents that use evaporate away it again, are diffused in the air, and atmospheric environment is polluted, influence people's health, remain in the packaging material, cause food pollution, harmful.
In order to change above-mentioned condition, publication number is that the european patent application of EP0158533A2 discloses the application for a patent for invention that a kind of name is called " heat-resisting laminated film ", and this invention provides a kind of usefulness heat-resisting multilayer complex films that multi-layer co-extruded combination process is made.It is as gas barrier layer D with the above copolymer of Vingon binary, PP is as outer A, and be distributed in the polyolefin B of sour modification of above-mentioned two interlayers and thermoplastic polyurethane C as two-layer bonded layer, and it is bonding mutually between the tack coat, the acid modified polyolefin adhesive linkage is with outer bonding, and thermoplastic poly propylhomoserin tack coat is mutually bonding with gas barrier layer, thereby realize the cementation between each layer, on the whole cross section, from outside to inside dividing seven layers, be followed successively by A/B/C/D/C/B/A, above-mentioned composite membrane is under the treatment conditions of harshness, and for example boiling still can layering under high temperature oil bath processing and the pressure.Above-mentioned composite membrane adopts multi-layer co-extruded composite algorithm to produce, because the number of plies is more, causes multi-layer co-extruded equipment complex complexity, and investment is big, and the product cost height is difficult for applying.
Summary of the invention
The object of the present invention is to provide a kind of with PVDC be the intermediate layer table, in, the lining high-barrier, the transparent type that are closely as one, resistant to elevated temperatures PVDC lamination complex fire resistant cooking food packaging film.
Simultaneously, the present invention also aims to provide a kind of preparation method of this PVDC lamination complex fire resistant cooking food packaging film.
For achieving the above object, technical program of the present invention lies in having adopted a kind of PVDC lamination complex fire resistant cooking food packaging film, the intermediate layer PVDC copolymer film of vinyl chloride (vinylidene chloride with) links to each other with the two-layer of both sides by bonding agent respectively, and described bonding agent is two solvent-free binding agents of component polyamine fat type.
The host of the described pair of solvent-free binding agent of component polyamine fat type is for containing the polyisocyanates composition, and curing agent is the compound that contains hydroxy functional group.
Described food package film is from outside to inside being: the copolymer film of polyester film/pair solvent-free binding agent/vinylidene chloride of component polyamine fat type and the vinyl chloride/pair solvent-free binding agent/cast polypropylene film of component polyamine fat type.
Described food package film is from outside to inside being: the copolymer film of bidirectional stretching polypropylene film/pair solvent-free binding agent/vinylidene chloride of component polyamine fat type and the vinyl chloride/pair solvent-free binding agent/cast polypropylene film of component polyamine fat type.
The thickness of each layer of packaging film cross section (μ m) is from outside to inside being followed successively by: light packing, 12/2/20/2/50; Heavily pack 12/2/20/2/70.
The thickness of each layer of packaging film cross section (μ m) is from outside to inside being followed successively by: light packing, 19/2/20/2/50; Heavily pack 19/2/20/2/70.
Simultaneously, the present invention also provides a kind of preparation method of PVDC lamination complex fire resistant cooking food packaging film, and this method adopts solvent-free combination process, and concrete steps are as follows:
(1) film is rolled up I (intermediate layer PVDC film), film volume II (outer PET) uncoiling, and by being sent to coater unit behind flattening, tension force control, the edge adjusting device, one side at film I (intermediate layer PVDC film) evenly is coated with upward adhesive for solvent-free use, and enter recombiner unit with film II (outer PET film) and carry out compoundly, shown, in the film volume III (PET/adh/PVDC) that is integrated;
(2) set by step the method for (1), film is rolled up III (PET/adh/PVDC), film volume IV (nexine CPP) uncoiling, and by behind flattening, tension force control, the edge adjusting device, be sent to coater unit, evenly coat solvent-free binding agent on the surface that the PVDC of film III (PET/adh/PVDC) is uncoated, and enter recombiner unit with film IV (nexine CPP) and carry out compound, can finish whole solvent-free combination process, shown, in, the PET/adh/PVDC/adh/CPP composite membrane finished product that is closely as one of lining.
Described solvent-free binding agent is two solvent-free binding agents of component polyamine fat type, host be contain polyisocyanate component, curing agent is the compound that contains hydroxy functional group.
Adopt two solvent-free binding agents of component polyamine fat type, the solvent-free binding agent of two component polyamine fat types has higher first adhesive power, and the adhesive effect that this initial bonding strength forms between thin layer will be far longer than the convergent force that the PVDC film produces under high temperature more than 121 ℃, therefore, made film also has enough bonding forces in high-temperature boiling more than 121 ℃, guarantee that laminated film is smooth all the time, wrinkle resistant, not stratified, indeformable, heat-sealing place is not ftractureed, and reaches the purpose that is used for thermophilic digestion.Film of the present invention is to adopt solvent-free combination process, handles on solvent-free composite machine, and film need not be heated in recombination process, and the PVDC film does not need just can be directly used in through pre-contraction processing compound, has reduced technical process, has reduced cost.PET, the BOPP that use on film of the present invention top layer have higher hear resistance, and be well-pressed, smooth, glossy, can make the specious generous of packaging film in surperficial or printing inside, and nexine uses CPP, heat sealability is preferably arranged, the heat seal strength height.PET, BOPP, CPP have higher mechanical strength, stable chemical performance, grease resistance, solvent, acid, alkali, salt, not with food generation chemical reaction, the food hygiene performance is good, and anti-thermophilic digestion more than 121 ℃ closely is combined into one by the solvent-free binding agent of two component polyamine fat types with PVDC, do not peel off when guaranteeing thermophilic digestion, indeformable.
The Performance Detection project and the result of product
(supervising inspection center through national plastic products quality detects)
| Sequence number | Project | Index | ||||
| Before the boiling | After the boiling | |||||
| Standard | Actual measurement | Standard | Actual measurement | |||
| ????1 | Hot strength (vertical, horizontal) MPa | ????≥45/60 | ????68/100 | ??—— | ||
| ????2 | Elongation at break (vertical, horizontal) % | ????≥40 | ????64/43 | ??—— | ||
| ????3 | Tear edge (vertical, horizontal) N | ????≥10 | ????12/10 | ??—— | ||
| ????4 | 2% secant modulus (vertical, horizontal) MPa | ????600-800 | ????695/757 | ??—— | ||
| ????5 | Heat sealing strength N | ????≥30 | ????42/43 | ??≥24 | ????35.7/36.3 | |
| ????6 | Peeling force N | ????PET/PVDC | ????≥5 | Not peelable | ??≥4 | ????4.8 |
| ????BOPP/PVDC | ????≥5 | Not peelable | ??≥4 | ????4.8 | ||
| ????PVDC/CPP | ????≥5 | ????6 | ??≥4 | ????5.6 | ||
| ????7 | Oxygen transit dose cm3/m224hatm | ????≤20 | ????7.9 | ??—— | ||
| ????8 | Steam permeable amount g/m224hatm | ????≤5 | ????1.6 | ??—— | ||
| ????9 | Anti-pendulum impact J | ????≥1 | ????1.5 | ??—— | ||
| ????10 | 100 ℃ of hot water shrinkages (vertical, horizontal) % | ????≤1 | ????-0.2/-0.1 | ??—— | ||
| ????11 | Heat-resisting resistance to medium | There is not obviously distortion in the packaging film, no layering breakage | ||||
The remarkable characteristic of the composite membrane of anti-boiling product of the present invention is: (1) transparency, at the total light transmittance of 500nm be more than 90% (with commercially available spectrophotometer---Hitachi produces 330 type automatic spectrophotometers and measures); (2) vapour lock is better, and under 30 ℃, the condition of 65%KH (relative temperature), the oxygen transit dose is 20cm
3/ m
224hatm following (Ox-tran2/20 that utilizes U.S. Moden Control company to make measures).
Composite membrane of the present invention is suitable for packing various meat products, band soup food through high temperature sterilization; Adopting composite membrane of the present invention to carry out packaged food has the following advantages: pack transparently, be beneficial to the consumer and buy; Shelf life storage is long, is beneficial to long-term storage; Can be used for high temperature heating such as microwave; Cost is low, is easy to apply.
Description of drawings
Fig. 1 for a kind of be the cross section structure enlarged drawing of food-film product (composite membrane) of the digestion resistant in intermediate layer with PVDC;
Fig. 2 is the structural representation of the used solvent-free composite machine of the present invention;
Fig. 3 is technological process of production figure of the present invention.
The specific embodiment
As shown in Figure 1, the intermediate layer PVDC copolymer film of vinyl chloride (vinylidene chloride with) 3 ' links to each other with nexine 4 ' by two component polyamine fat types solvent-free sticking 2 ' and skin 1 ' respectively, its ectomesoderm 1 ' is PET (mylar), and nexine 4 ' is CPP (cast polypropylene film).Outer 1 ' also can be BOPP (bidirectional stretching polypropylene film) or BOPA (BON biaxially oriented nylon film) simultaneously.
The composite membrane cross section structure is in the present embodiment: PET/adh/PVDC/adh/CPP, in the formula: adh represents two solvent-free binding agents of component polyamine fat type.The laminated film gross thickness is: 86 μ m
Every layer thickness is: PET is a biaxially oriented polyester film, and thickness is: 12 μ m;
Adh is two solvent-free tack coats of component polyamine fat type, and thickness is: 2 μ m;
PVDC is a biaxial tension vinylidene chloride copolymer film, and thickness is: 20 μ m;
Adh is two solvent-free tack coats of component polyamine fat type, and thickness is: 2 μ m;
CPP is a cast polypropylene film, and thickness is: 50 μ m.
As Fig. 2, shown in Figure 3, the compound production method that with PVDC is the digestion resistant food-film bag in intermediate layer is: the first step: film is rolled up I (intermediate layer PVDC film) be placed on the unreeling shaft 9 on the compounding machine, film volume II (outer PET) is placed on the unreeling shaft 1, two films are respectively through the uncoiling machine, and by being sent to coater unit behind flattening, tension force control, the edge adjusting device 12,13, one side at film I (intermediate layer PVDC film) is coated with adhesive for solvent-free use equably, does not have coating adhesive on the film II (outer PET).The binding agent that adopts is two solvent-free binding agents of component polyamine fat type, Henkel KGaA company produces, the trade mark is Liofol, host UR7745 (containing polyisocyanate component), curing agent UR6075 (compound that contains hydroxy functional group) in host and curing agent in 6: 1 ratio after in blender, mixing under 55 ℃, squeeze in the coating pan through defeated glue pump, upper glue roller 2 half is immersed in the binding agent, along with the rotation of upper glue roller 2, on upper glue roller, be stained with binding agent, the gluing coefficient is 5: 1.Then through metering roll 3 meterings, and through pass rubber roll 4 adhesive-coated on gluing steel Kun 5, film I (intermediate layer PVDC film) passes through between gluing steel rider 5 and gluing pressure roller 6, adhesive on the coating steel rider just is uniformly coated on the side surface of film I (intermediate layer PVDC film), the side and the film II (outer PET) that are coated with adhesive bond together, and enter recombiner unit together, between compound steel rider 7 and composite press roller 8, carry out pressing, cool off through chill roll 10 then, again through having flattening, tension force control, the edge adjusts that the device 14 of function is compound to be sent to rolling on the winder 11 after smooth, so just obtains table, in the film volume III (PET/adh/PVDC) that is closely as one;
Second step: by the method for the first step, adopt same solvent-free composite machine, with the volume of the film on the unreeling shaft 9 III (PET/adh/PVDC), film volume IV (nexine CPP) on the unreeling shaft 1 is respectively through the uncoiling machine, and by flattening, tension force control, edge adjusting device 12, after 13, be sent to coater unit, evenly be coated with the solvent-free binding agent of last layer on the PVDC surface of film III (PET/adh/PVDC), the solvent-free binding agent that adopts is two solvent-free binding agents of component polyamine fat type, host UR7745 (containing polyisocyanate component) and curing agent UR6075 (compound that contains hydroxy functional group) in 6: 1 ratios under 55 ℃ after blender mixes, be pumped into coating pan through defeated glue, carry out gluing by upper glue roller 2, gluing coefficient 5: 1, metering roll in coating pan 3 meterings then, and through passing rubber roll 4 biography glue, again by gluing steel rider 5, gluing pressure roller 6 evenly is coated with on opposite side (the being the PVDC side) surface of film III (PET/adh/PVDC), film III (PET/adh/PVDC) carries out compound with film IV (nexine CPP) through compound steel rider 7 and composite press roller 8 after being coated with, cool off through chill roll 10 then, through having flattening, tension force control, the edge is adjusted compound being sent to after smooth of the device 14 of function and is carried out rolling on the winder 11, obtain film volume V (PET/adh/PVDC/adh/CPP), promptly finish whole solvent-free combination process, obtained table, in, in the PET/adh/PVDC/adh/CPP composite membrane finished product that is closely as one.
The technological parameter of production method of the present invention is:
The temperature aspect: upper glue roller 2, metering roll 3, biography rubber roll 4, gluing steel rider 5, gluing pressure roller 6, composite press roller 8 are 78 ℃, and each roller is a hollow type, and inside is connected with the hot water of control temperature, and be stable to guarantee the roller temperature.
The pressure aspect: upper glue roller 2, metering roll 3 are that 0.7MPa, biography rubber roll 4 are 0.4MPa for 0.25MPa, gluing steel rider 5, gluing pressure roller 6 for 0.25MPa, composite press roller 8, and pressure is produced by the two ends compressed air cylinder of roller.
Tension force aspect: PET film 0.1-0.15MPa, CPP film 0.1MPa, PVDC film 0.1MPa, winder 11 tension force 150N.
The film recombination velocity is 105m/min, gluing coefficient 5: 1.
Claims (8)
1, a kind of PVDC lamination complex fire resistant cooking food packaging film, the intermediate layer PVDC copolymer film of vinyl chloride (vinylidene chloride with) links to each other with the two-layer of both sides by bonding agent respectively, it is characterized in that: described bonding agent is two solvent-free binding agents of component polyamine fat type.
2, digestion resistant food package film according to claim 1 is characterized in that: the host of the described pair of solvent-free binding agent of component polyamine fat type is for containing the polyisocyanates composition, and curing agent is the compound that contains hydroxy functional group.
3, digestion resistant food package film according to claim 2 is characterized in that: described food package film is from outside to inside being: the copolymer film of polyester film/pair solvent-free binding agent/vinylidene chloride of component polyamine fat type and the vinyl chloride/pair solvent-free binding agent/cast polypropylene film of component polyamine fat type.
4, digestion resistant food package film according to claim 2 is characterized in that: described food package film is from outside to inside being: the copolymer film of bidirectional stretching polypropylene film/pair solvent-free binding agent/vinylidene chloride of component polyamine fat type and the vinyl chloride/pair solvent-free binding agent/cast polypropylene film of component polyamine fat type.
5, digestion resistant food package film according to claim 3 is characterized in that: the thickness of each layer of packaging film cross section (μ m) is from outside to inside being followed successively by: light packing, 12/2/20/2/50; Heavily pack 12/2/20/2/70.
6, digestion resistant food package film according to claim 4 is characterized in that: the thickness of each layer of packaging film cross section (μ m) is from outside to inside being followed successively by: light packing, 19/2/20/2/50; Heavily pack 19/2/20/2/70.
7, a kind of preparation method of PVDC lamination complex fire resistant cooking food packaging film as claimed in claim 1, it is characterized in that: this method adopts solvent-free combination process, and concrete steps are as follows:
(1) film is rolled up I (intermediate layer PVDC film), film volume II (outer PET) uncoiling, and by being sent to coater unit behind flattening, tension force control, the edge adjusting device, one side at film I (intermediate layer PVDC film) evenly is coated with upward adhesive for solvent-free use, and enter recombiner unit with film II (outer PET film) and carry out compoundly, shown, in the film volume III (PET/adh/PVDC) that is integrated;
(2) set by step the method for (1), adopt same solvent-free composite machine, film is rolled up III (PET/adh/PVDC), film volume IV (nexine CPP) uncoiling, and by flattening, tension force control, behind the edge adjusting device, be sent to coater unit, evenly coat solvent-free binding agent on the surface that the PVDC of film III (PET/adh/PVDC) is uncoated, and enter recombiner unit with film IV (nexine CPP) and carry out compound, can finish whole solvent-free combination process, obtain table, in, in the PET/adh/PVDC/adh/CPP composite membrane finished product that is closely as one.
8, preparation method according to claim 7 is characterized in that: described solvent-free binding agent is two solvent-free binding agents of component polyamine fat type, host be contain polyisocyanate component, curing agent is the compound that contains hydroxy functional group.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031261140A CN100500431C (en) | 2003-04-10 | 2003-04-10 | PVDC laminated composite high-temperature-resistant steamed and boiled food packaging film and its preparation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031261140A CN100500431C (en) | 2003-04-10 | 2003-04-10 | PVDC laminated composite high-temperature-resistant steamed and boiled food packaging film and its preparation method |
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| CN100500431C CN100500431C (en) | 2009-06-17 |
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| WO2007131409A1 (en) * | 2006-05-15 | 2007-11-22 | Jiangsu Caihua Packing Group Company | Pvdc-polyolefin coextruded thermal-formed high-blocked composite packaging material |
| CN102173143A (en) * | 2010-12-23 | 2011-09-07 | 黄山永新股份有限公司 | Stewing-resistant composite film and stewing-resistant bag |
| CN102848672A (en) * | 2012-08-14 | 2013-01-02 | 海南赛诺实业有限公司 | Pasteurized polyvinylidene chloride-coated film and manufacturing method thereof |
| CN103059199A (en) * | 2012-12-26 | 2013-04-24 | 海南必凯水性涂料有限公司 | Poaching type special polyvinyl dichloride (PVDC) rubber latex and preparation method thereof and application |
| WO2013156849A1 (en) * | 2012-04-21 | 2013-10-24 | Nourishco Beverages Ltd. | A laminate for producing flexible pouch for storing water |
| CN105082708A (en) * | 2015-08-10 | 2015-11-25 | 漳州市芳远印务有限公司 | Manufacturing method for compound packaging film resistant to high-temperature steaming and boiling |
| CN105365313A (en) * | 2014-08-26 | 2016-03-02 | 丹东全德高科技包装有限公司 | PP/EVA/PVDC/EVA/PE five-layer co-extrusion stretch film |
| WO2017139884A1 (en) * | 2016-02-15 | 2017-08-24 | Macro Technology Inc. | Multilayer barrier film |
| CN108673947A (en) * | 2018-05-02 | 2018-10-19 | 天津智达科技有限公司 | A kind of plastic film bag heat-sealing cut-out flatten unit |
| CN112955316A (en) * | 2018-09-28 | 2021-06-11 | 陶氏环球技术有限责任公司 | Method of forming a laminate |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2227020Y (en) * | 1995-05-18 | 1996-05-15 | 徐平 | Dry-type compound packing film |
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2003
- 2003-04-10 CN CNB031261140A patent/CN100500431C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007131409A1 (en) * | 2006-05-15 | 2007-11-22 | Jiangsu Caihua Packing Group Company | Pvdc-polyolefin coextruded thermal-formed high-blocked composite packaging material |
| US8084109B2 (en) | 2006-05-15 | 2011-12-27 | Jiangsu Caihua Packing Group Company | PVDC-polyolefin coextruded thermal-formed high-blocked composite packaging material |
| CN102173143A (en) * | 2010-12-23 | 2011-09-07 | 黄山永新股份有限公司 | Stewing-resistant composite film and stewing-resistant bag |
| WO2013156849A1 (en) * | 2012-04-21 | 2013-10-24 | Nourishco Beverages Ltd. | A laminate for producing flexible pouch for storing water |
| CN102848672A (en) * | 2012-08-14 | 2013-01-02 | 海南赛诺实业有限公司 | Pasteurized polyvinylidene chloride-coated film and manufacturing method thereof |
| CN103059199A (en) * | 2012-12-26 | 2013-04-24 | 海南必凯水性涂料有限公司 | Poaching type special polyvinyl dichloride (PVDC) rubber latex and preparation method thereof and application |
| CN103059199B (en) * | 2012-12-26 | 2015-12-23 | 海南聚能功能薄膜技术开发有限公司 | Special PVDC latex of poach type and its production and use |
| CN105365313A (en) * | 2014-08-26 | 2016-03-02 | 丹东全德高科技包装有限公司 | PP/EVA/PVDC/EVA/PE five-layer co-extrusion stretch film |
| CN105082708A (en) * | 2015-08-10 | 2015-11-25 | 漳州市芳远印务有限公司 | Manufacturing method for compound packaging film resistant to high-temperature steaming and boiling |
| WO2017139884A1 (en) * | 2016-02-15 | 2017-08-24 | Macro Technology Inc. | Multilayer barrier film |
| CN108673947A (en) * | 2018-05-02 | 2018-10-19 | 天津智达科技有限公司 | A kind of plastic film bag heat-sealing cut-out flatten unit |
| CN112955316A (en) * | 2018-09-28 | 2021-06-11 | 陶氏环球技术有限责任公司 | Method of forming a laminate |
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