CN204076962U - A kind of active dry yeast packaging composite film easy to peel automatically - Google Patents
A kind of active dry yeast packaging composite film easy to peel automatically Download PDFInfo
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Abstract
A kind of active dry yeast is packed automatically with composite film easy to peel, and the printed layers that this composite film easy to peel is set gradually by ecto-entad, barrier layer, protective layer and hot sealing layer form; Printed layers is the biaxial tension pet film of 12 micron thickness; barrier layer is the aluminium foil barrier layer of 7 micron thickness; protective layer is the biaxial tension pet film of 12 micron thickness; hot sealing layer is the modified poly ethylene film of 75 micron thickness, bonding by alcohol-soluble polyurethane adhesive between layers.A kind of active dry yeast that the utility model provides packaging composite film easy to peel automatically, its composite film packaging self has easy peel property, for vacuum packaging, is highly suitable for active dry yeast fresh-keeping.
Description
Technical field
The utility model relates to a kind of aluminum-plastic composite membrane, and especially a kind of active dry yeast vacuumizes automatic packaging composite film easy to peel.
Background technology
Yeast is the maximum at present microbiological industry products of the mankind, at the beginning of the history of mankind's wine brewing, vinegar processed, sauce processed starts, just comes into contacts with yeast.Yeast as microbial cells by human industryization production, be also the whole world, can by comparison without any microorganism kind, worldwide production reaches ton up to a million, the development of modern biotechnology, expands the sphere of action of saccharomycete in human society.There is saccharomycetic extensive use in the field such as food, chemical industry, metallurgy, information, the energy, environmental protection, pharmacy, skin makeup.The development of the production technology of active dry yeast, for society provides high-quality, is convenient to the active dry yeast product that transports, more facilitate the circulation of yeast in outlying district and factory, facilitate the life of people, improve product quality, facilitate yeast and apply widely.Therefore, to the research of active dry yeasr packaging and Techniques of preserving, there is great theory and practice meaning.
Active dry yeast is the organism of the work being in " hibernation-like state ", run into water and have a sugar environment after, will " revive ", flourish, therefore can be used for fermentation bread and wine brewing.Since the seventies, adopt genetic engineering and the dry technology in modern times, make and namely send out active dry yeast (instant active dry yeast) also known as high activity dried yeast, compared with active dry yeast, moisture content is lower, only 4-6%, mostly be faint yellow circle or rod-shpaed particle, fermenting speed is fast, does not need prehydration, can directly use during use.Yeast particles particle diameter is generally 0.5mm, and light weight easily produces Electrostatic Absorption.Current external large-scale yeast company is as French Le Sifu, English connection AB Ma Li, domestic Angel Yeast Co., Ltd adopts aluminum-plastic composite membrane to vacuumize and is packaged into 500 grams/bag, 100 grams/bag equal-specification is put on market, shelf-life (shelf-life) about 2 years.Namely four-layer structure (pet film/aluminium foil/pet film/polyethylene) high-barrier preservation compound film is adopted.Require aluminum-plastic composite membrane its oxygen transit dose≤0.5cm3/ (m224h0.1Mpa), steam penetrating capacity≤0.5g/ (m224h) is to reach the fresh-keeping barrier requirement of yeast activity.
For realizing easily peeling off functional performance requirement, domestic and international material researcher at present more adopts following technological means to realize: (1) adopts physics coating process, i.e. discontinuity surface application silicone oil, realizes incomplete heat-sealing with oil, reaches peelable requirement; (2) adhesive rubbing method, adopt is coated with the substrate surfaces such as aluminium foil with special dual-component polyurethane more, controls peel force by additional adhesive means.(3) low melting point heat-sealable material interfacial adhesion effect, namely adopts the low melting point copolymers such as ethene-vinyl acetate as EVA, realizes interfacial adhesion effect, reach low peel strength and require (4) particulate material physical blending.Namely by physical blending mode, reach fine particle and be filled in base material, reduce material interface heat seal strength, reach and control peel force requirement.Domestic patent: a kind of easily stripping film (patent No.: 201220281663.1), provide a kind of easily stripping film structure, namely on polyethylene PE film layer, be coated with the silicon layer coating of point-like or strip, reduce contact area, effectively decrease off-type force, easily the packing film of product can be torn, reach the functionalization requirement of easily peeling off.A kind of Easy-to-peel cover film (patent No.: 201020517110.2) disclose a kind of Easy-to-peel cover film, it comprises the hot sealing layer, the easily peel ply that set gradually, barrier layer, tack coat and weathering layer, wherein hot sealing layer is the ethylene-vinyl acetate copolymer rete carrying out modification with low density polyethylene (LDPE) and metallocene low density polyethylene (LDPE), easy peel ply is a low density polyethylene layer, barrier layer is a soft state aluminium foil layer, and described tack coat is PAUR layer, and weathering layer is polyester layer.Namely by a certain amount of vinyl acetate-ethylene copolymer of blending (EVA) in polyethylene base material, reach the controllability of polyethylene interface heat seal strength, play release function.In addition, domestic utility model patent: the easily-stripped film (patent No.: 00126315.3) provide a kind of film comprising matrix and sealant, wherein sealant contains resin combination, and this resin combination comprises thermoplastic resin and average grain diameter is 0.05 μm--and 20 μm, there is the fine grained easily peeling off function.Namely fine particle is adopted to fill the easy stripping requirement that combination reaches the sealant resin when peeling off.
In sum, although above various method also can reach easy stripping performance requirement, as the easy black yeast of hot sealing layer, affect yeast activity, cause later stage fermentation ability to be restricted.Such as, vinyl acetate-ethylene copolymer (EVA) after temperature heat-sealing, inevitably at high temperature produces sour gas more than 120 DEG C.The noxious materials such as isocyanate group free in coating adhesive have killed yeast activity especially to a certain extent.Namely hot sealing layer must possess good chemical stability and biocompatibility, ensures the foodsafety that material contacts with yeast.Therefore, it is polyethylene and the polybutene copolymer blending and modifying film of base material that the internal layer that this patent and yeast directly contact adopts with polythene material.
This patent and a kind of high-activity dry yeast packaging composite film (patent No. of domestic utility model; 201120150508.1) difference is: (1) this patent is for realizing the packing instructions of yeast product functionalization, adopt four-layer structure aluminum-plastic composite membrane, pet film/aluminium foil/pet film/function hot sealing layer.This composite membrane possesses hand and tears easily stripping and 700-800mmHg vacuum packaging functional characteristic.(2) hand tears easily stripping function and derives from polybutene and polyvinyl resin blending and modifying functional characteristic in three-layer co-extruded blow molding technique.(3) this patent adopts alcohol soluble bi-component polyurethane adhesive, in its host and curing agent isocyanates and free toluene diisocyanate (TDI) content extremely low, its composite in use can be not the same with ester dissolubility aromatic urethane, hydrolysis may be there is and discharge carcinogen toluenediamine (TDA), to material, there is good initial cohesiveness, affect by ambient humidity little, effectively can solve the technical barrier (general <4N/15mm) of the low peel strength problem of PET/PE layer through verification experimental verification.In a word, composite membrane described in 201120150508.1 patents is the general class packaging that yeast enterprise is using at present, does not possess and easily peels off functional characteristic.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of active dry yeast packaging composite film easy to peel automatically, this composite membrane complete high activity dried yeast vacuumize heat seal packaging after, its composite film packaging self has easy peel property, peeling force can be controlled in 4 ~ 8N/15mm scope, directly to peel off heat cover with hand and open and pack when namely user uses.This composite membrane is used for vacuum packaging, and has good yeast bio compatibility, is highly suitable for active dry yeast fresh-keeping.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of active dry yeast is packed with composite film easy to peel automatically,
The printed layers that this composite film easy to peel is set gradually by ecto-entad, barrier layer, protective layer and hot sealing layer form;
Printed layers is the biaxial tension pet film of 12 micron thickness; barrier layer is the aluminium foil barrier layer of 7 micron thickness; protective layer is the biaxial tension pet film of 12 micron thickness; hot sealing layer is the modified poly ethylene film of 75 micron thickness, bonding by alcohol-soluble polyurethane adhesive between layers.
Above-mentioned active dry yeast packs the preparation method with composite film easy to peel automatically, and the method comprises the following steps:
1) hot sealing layer is shaping: adopt three-layer co-extruded apparatus for blow moulding, adding mass fraction in inner layer extruder hopper is 20 ~ 40% polybutene copolymer resins, 60 ~ 80% polyvinyl resins, middle level and skin are polyvinyl resin, through extrusion and blow molding under 160 ~ 180 DEG C of conditions, form the modified poly ethylene film of 75 micron thickness;
2) color printing printed layers: by the biaxial tension pet film of 12 micron thickness, adopts ten look electronical line shaft intaglio press, completes in biaxial tension pet film colour and prints, obtain the printed layers after color printing;
3) printed layers, barrier layer, protective layer and hot sealing layer compound: adopt alcohol-soluble polyurethane adhesive dry-lamination process will be bonding between layers, namely make active dry yeast packaging composite film easy to peel automatically.
Above-mentioned active dry yeast packs the preparation method with composite film easy to peel automatically, step 3) dry-lamination process be:
3-1) printed layers and barrier layer adopt compounding machine compound: adopt 120 line intaglio plate cable rolls, the working concentration 30 ~ 35% of alcohol-soluble polyurethane adhesive, slaking 12 hours under 40 ~ 45 DEG C of conditions, namely completes the compound of the biaxial tension pet film of 12 micron thickness and the aluminium foil barrier layer of 7 micron thickness;
3-2) barrier layer and protective layer adopt compounding machine compound: adopt 120 line intaglio plate cable rolls, the working concentration 30 ~ 35% of alcohol-soluble polyurethane adhesive, completes the compound of the aluminium foil barrier layer of 7 micron thickness and the biaxial tension pet film of 12 micron thickness; Composite roll temperature 40-50 DEG C, adopt three sections of baking ovens, temperature is set as 50-90 DEG C;
3-3) protective layer and hot sealing layer adopt compounding machine compound: adopt 120 line intaglio plate cable rolls; the working concentration 30 ~ 35% of alcohol-soluble polyurethane adhesive; slaking 24 hours under 40 ~ 45 DEG C of conditions, namely completes the compound of the biaxial tension pet film of 12 micron thickness and the modified poly ethylene film of 75 micron thickness.
Material as color printing packages printing layer is the biaxial tension pet film of 12 micron thickness, so its superior chemical resistance and the transparency can ensure the quality of printing effect, also there is good protective effect to ink layer word and pattern simultaneously; Again because the material of barrier layer is 7 micron thick aluminium foil, thus the barrier of its excellence that packaging is possessed is moistureproof, airtight, shading and the performance such as corrosion-resistant; And; the material of protective layer is also the biaxial tension pet film of 12 micron thickness; so utilize the mechanical property of its excellence; the mechanical performance of packaging and resistance to elevated temperatures being increased greatly, effectively preventing from being packaged in broken bag or distortion because vacuumizing filling in automatic packaging process.
A kind of active dry yeast that the utility model provides packaging composite film easy to peel automatically, beneficial effect is as follows:
1, composite membrane adopts plastic-aluminum structure, is exclusively used in the packaging of active dry yeast.Adopt biaxial tension pet film/aluminium foil/biaxial tension pet film/modified poly ethylene film four-layer structure, adopt alcohol-soluble polyurethane adhesive bonding between layers.There is high-barrier characteristic (oxygen transit dose≤0.5cm3/ (m224h0.1Mpa), steam penetrating capacity≤0.5g/ (m224h), shading rate 100%), cost is lower, the features such as solvent residual amount is low, good biocompatibility, is very suitable for the preservation of high activity dried yeast.
2, the composite membrane made is automatic packaging volume film, and packaging process is automatic vacuum packaging, and under can bearing 700-800mmHg vacuum, yeast packs demand automatically, extensive to packaging facilities adaptability.
3, after becoming cake yeast finished product after the composite film packaging made, have easy stripping performance, heat cover is peeled off and is directly opened, without the need to using the sharp weapon such as scissors, stage property by the power of the available staff in heat seal face.Composite membrane again can recover a complete film after peeling off, and belongs to new functionization packaging.
Meeting environment high-barrier (oxygen transit dose≤0.5cm3/ (m224h0.1Mpa), steam penetrating capacity≤0.5g/ (m224h), shading rate 100%) high activity dried yeast class preservation characteristics require under, the vacuum pressure holding capacity of automatic vacuum packaging can be met, packed products hand can be reached again and tear the unlatching requirement of easily peeling off.
This composite membrane completes after high activity dried yeast vacuumizes heat seal packaging, and its composite film packaging self has easy peel property, and peeling force can be controlled in 4 ~ 8N/15mm scope, directly to peel off heat cover with hand and open and pack when namely user uses.Without the need to by the cooperation of the foreign object such as scissors, release surface is bright and clean, without wire drawing phenomenon, after namely packaging opens, is still all a complete film after stripping, can not produces breakage.Through Angel Yeast Co., Ltd's NRTL examining report display, this volume film is nontoxic, tasteless, and reliability is high, and cost is lower compared with current like product, be very suitable for the packaging of high activity dried yeast, and under normal temperature and pressure, yeast activity can store more than 2 years.
This composite membrane is used for vacuum packaging, and has good yeast bio compatibility, is highly suitable for active dry yeast fresh-keeping, packaging good forming effect, convenient unlatching.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail:
Fig. 1 is structural representation of the present utility model;
Detailed description of the invention
As shown in Figure 1, a kind of active dry yeast is packed with composite film easy to peel automatically,
The printed layers 1 that this composite film easy to peel is set gradually by ecto-entad, barrier layer 2, protective layer 3 and hot sealing layer 4 form;
Printed layers 1 is the biaxial tension pet film of 12 micron thickness; barrier layer 2 is the aluminium foil barrier layer of 7 micron thickness; protective layer 3 is the biaxial tension pet film of 12 micron thickness; hot sealing layer 4 is the modified poly ethylene film of 75 micron thickness, bonding by alcohol-soluble polyurethane adhesive between layers.
Above-mentioned active dry yeast packs the preparation method with composite film easy to peel automatically, and be packaged as example with Angel low sugar 500g high activity dried yeast (yeast activity 680), the method is made up of following steps:
1) hot sealing layer 4 is shaping: adopt three-layer co-extruded apparatus for blow moulding, adding mass fraction in inner layer extruder hopper is 20 ~ 40% polybutene copolymer resins, 60 ~ 80% polyvinyl resins, middle level and skin are polyvinyl resin, through extrusion and blow molding under 160 ~ 180 DEG C of conditions, form wide cut 690mm, 75 μm of thick modified poly ethylene films;
2) color printing printed layers 1: by 690mm wide cut, 12 μm of thick biaxial tension pet films, adopt ten look electronical line shaft intaglio press (Beiren Printing Machinery Co., Ltd., Shaanxi's manufacture), complete in biaxial tension pet film colour and print, obtain the printed layers after color printing 1;
3) printed layers 1, barrier layer 2, protective layer 3 and hot sealing layer 4 compound: adopt alcohol-soluble polyurethane adhesive dry-lamination process will be bonding between layers, namely make active dry yeast packaging composite film easy to peel automatically;
Printed layers 1, barrier layer 2, protective layer 3 and hot sealing layer 4 are respectively: printed layers 1 is step 2) obtained by color printing after 690mm wide cut, 12 μm of thick biaxial tension pet films; Barrier layer 2 is 690mm wide cut, 7 μm of thick aluminium foils; Protective layer 3 is 690mm wide cut, the biaxial tension pet film of 12 μm of thick blank; Hot sealing layer 4 is step 1) obtained by wide cut 690mm, 75 μm of thick modified poly ethylene films;
4) cut: by step 3) slaking 24 hours under 45 DEG C of heated drying air conditions of the four-layer structure composite film easy to peel of gained, after being cooled to room temperature state, be divided into wide cut 335mm through high-speed cutter, long 500m finished product volume film;
5) pack: by step 4) gained finished product volume film at automatic packaging machine, under 730mmHg vacuum degree condition, through 30 bags/minute to complete automatic packaging (longitudinal sealing 190 DEG C, upper envelope 230 DEG C, underseal 230 DEG C) to form 500g high activity dried yeast packed products.
Active dry yeast packs the preparation method with composite film easy to peel automatically, step 3) dry-lamination process be:
3-1) printed layers 1 and barrier layer 2 adopt compounding machine compound: adopt 120 line intaglio plate cable rolls, the working concentration 30 ~ 35% of alcohol-soluble polyurethane adhesive, slaking 12 hours under 40 ~ 45 DEG C of conditions, namely completes the compound of the biaxial tension pet film of 12 micron thickness and the aluminium foil barrier layer of 7 micron thickness;
3-2) barrier layer 2 and protective layer 3 adopt compounding machine compound: adopt 120 line intaglio plate cable rolls, the working concentration 30 ~ 35% of alcohol-soluble polyurethane adhesive, completes the compound of the aluminium foil barrier layer of 7 micron thickness and the biaxial tension pet film of 12 micron thickness; Composite roll temperature 40-50 DEG C, adopt three sections of baking ovens, temperature is set as 50-90 DEG C;
3-3) protective layer 3 and hot sealing layer 4 adopt compounding machine compound: adopt 120 line intaglio plate cable rolls; the working concentration 30 ~ 35% of alcohol-soluble polyurethane adhesive; slaking 24 hours under 40 ~ 45 DEG C of conditions, namely completes the compound of the biaxial tension pet film of 12 micron thickness and the modified poly ethylene film of 75 micron thickness.
Adopt biaxial tension pet film/aluminium foil/biaxial tension pet film/modified poly ethylene film four-layer structure, adopt alcohol-soluble polyurethane adhesive bonding between layers.There is high-barrier characteristic (oxygen transit dose≤0.5cm3/ (m224h0.1Mpa), steam penetrating capacity≤0.5g/ (m224h), shading rate 100%), cost is lower, the features such as solvent residual amount is low, good biocompatibility, is very suitable for the preservation of high activity dried yeast.
Above-mentioned 500g high activity dried yeast vacuum packaging finished product, its composite membrane can within the scope of 6N/15mm peeling force, without the need to cooperating by foreign objects such as scissors, namely the power that hand tears open packaging, release surface is bright and clean, without wire drawing phenomenon, after namely packaging opens, be still a complete film after whole stripping, can not breakage be produced.Through Angel Yeast Co., Ltd's NRTL examining report display, this volume film is nontoxic, tasteless, and reliability is high, and cost is lower compared with current like product, be very suitable for the packaging of high activity dried yeast, and under normal temperature and pressure, yeast activity can store more than 2 years.
Claims (1)
1. active dry yeast is packed automatically with a composite film easy to peel, it is characterized in that:
The printed layers (1) that this composite film easy to peel is set gradually by ecto-entad, barrier layer (2), protective layer (3) and hot sealing layer (4) form;
Printed layers (1) is the biaxial tension pet film of 12 micron thickness; barrier layer (2) is the aluminium foil barrier layer of 7 micron thickness; protective layer (3) is the biaxial tension pet film of 12 micron thickness; hot sealing layer (4) is the modified poly ethylene film of 75 micron thickness, bonding by alcohol-soluble polyurethane adhesive between layers.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104325743A (en) * | 2014-10-15 | 2015-02-04 | 宜昌宏裕塑业有限责任公司 | Easily stripped composite membrane used for automatic package of active dry yeast and preparation method thereof |
| CN105729943A (en) * | 2016-04-25 | 2016-07-06 | 安徽凯航包装科技有限公司 | Packaging bag capable of resisting missible oil pesticide |
| CN113103786A (en) * | 2021-04-15 | 2021-07-13 | 广州永新包装有限公司 | Pre-compounded aluminum foil surface gravure printing method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104325743A (en) * | 2014-10-15 | 2015-02-04 | 宜昌宏裕塑业有限责任公司 | Easily stripped composite membrane used for automatic package of active dry yeast and preparation method thereof |
| CN105729943A (en) * | 2016-04-25 | 2016-07-06 | 安徽凯航包装科技有限公司 | Packaging bag capable of resisting missible oil pesticide |
| CN113103786A (en) * | 2021-04-15 | 2021-07-13 | 广州永新包装有限公司 | Pre-compounded aluminum foil surface gravure printing method |
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Address after: No.1, Juxiang Avenue, yaqueling Town, Yiling District, Yichang City, Hubei Province Patentee after: HUBEI HONGYU NEW PACKAGING MATERIALS Co.,Ltd. Address before: 443113, No. two, 188 Ring Road, crow crow Town, Yiling District, Hubei, Yichang Patentee before: YICHANG HONGYU PLASTIC Co.,Ltd. |