CN106634130A - Packaging bag - Google Patents
Packaging bag Download PDFInfo
- Publication number
- CN106634130A CN106634130A CN201611244335.3A CN201611244335A CN106634130A CN 106634130 A CN106634130 A CN 106634130A CN 201611244335 A CN201611244335 A CN 201611244335A CN 106634130 A CN106634130 A CN 106634130A
- Authority
- CN
- China
- Prior art keywords
- mould inhibitor
- mould
- packaging bag
- resin
- copolymer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
- C08K5/0058—Biocides
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
- C08K5/092—Polycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/17—Amines; Quaternary ammonium compounds
- C08K5/175—Amines; Quaternary ammonium compounds containing COOH-groups; Esters or salts thereof
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D129/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Coating compositions based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Coating compositions based on derivatives of such polymers
- C09D129/02—Homopolymers or copolymers of unsaturated alcohols
- C09D129/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D131/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid; Coating compositions based on derivatives of such polymers
- C09D131/02—Homopolymers or copolymers of esters of monocarboxylic acids
- C09D131/04—Homopolymers or copolymers of vinyl acetate
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D187/00—Coating compositions based on unspecified macromolecular compounds, obtained otherwise than by polymerisation reactions only involving unsaturated carbon-to-carbon bonds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Plant Pathology (AREA)
- Mechanical Engineering (AREA)
- Biodiversity & Conservation Biology (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
A packaging bag comprises a bag body and a mould-proof preservation coating layer, wherein a storage cavity is formed in the bag body, and the mould-proof preservation coating layer is arranged on the inner surface of the storage cavity; the raw material of the mould-proof preservation coating layer is a mould-proof preservation coating which is prepared from components in percentage by weight as follows: 20%-60% of resin, 30%-70% of a solvent, 0.5%-10% of a mould inhibitor and 0.3%-5% of an auxiliary, wherein the resin is at least one of polyurethane, a acrylate copolymer, polyvinyl alcohol, polyvinylidene chloride, modified polyvinylidene chloride, an ethylene-vinyl acetate copolymer, a polyvinyl acetate copolymer and a vinyl acetate-butyl ester copolymer, and the solvent is at least one of water and ethyl alcohol. According to the packaging bag, the surface of the mould-proof preservation coating layer on the inner surface of the storage cavity is dense and pore-free, and the mould-proof preservation coating layer has better effects of keeping constant moisture and preventing mould by aid of addition of the mould inhibitor. The packaging bag is particularly suitable for preserving food such as fruit, bread, tobacco and the like which have shorter storage life, are prone to mould within short time and need to be eaten timely.
Description
Technical field
The present invention relates to packing technique field, more particularly to a kind of packaging bag.
Background technology
The condition of the shorter article storage of the Storage period such as food and tobacco leaf is harsher, otherwise will be a large amount of because of microorganism
Breeding is gone mouldy and makes it no longer fresh, loses original value.Commonly use drying prescription and strong oxidizer to reach in industry at present
To fresh-keeping effect, the environment of a relative water shortage is built with drier, press down mycostatic growth；Killed with strong oxidizer mould
Bacterium.But the equal Shortcomings of both approaches.Strong oxidizer is unfriendly to human body and environment；And water of the drier in absorption air
Divide the moisture that also can be absorbed simultaneously in food, in turn result in the problem of food-dewatering.
The content of the invention
Based on this, it is necessary to provide a kind of holding moisture constant and can prevent the packaging bag gone mouldy.
A kind of packaging bag, including bag body and anti-mildew fresh-keeping coating, the bag body is provided with cavity used for placing articles, the mould proof guarantor
Inner surface of the fresh coating located at the cavity used for placing articles；The raw material of the anti-mildew fresh-keeping coating is anti-mildew fresh-keeping coating, described mould proof
Antistaling coating percentage composition by weight includes following component：Resin 20%～60%, solvent 30%～70%, mould inhibitor 0.5%
～10% and auxiliary agent 0.3%～5%, wherein the resin be polyurethane, acrylic acid esters co-polymer, polyvinyl alcohol, poly- inclined two
Vinyl chloride, modified polyvinilidene dichloroethylene, ethylene-vinyl acetate analog copolymer, polyvinyl acetate copolymer and vinyl acetate
At least one in ester-acrylate copolymer, the solvent is at least one in water and ethanol.
Above-mentioned packaging bag, the anti-mildew fresh-keeping coating surface densification of the inner surface of cavity used for placing articles, imporosity, and be added with anti-
Mould dose, thus keep moisture constant and the effect for preventing from going mouldy with preferable.The packaging bag be particularly well-suited to fruit, bread and
The Storage periods such as tobacco leaf are shorter, easily go mouldy in short-term and need in time eat the fresh-keeping of article.
Wherein in one embodiment, the acrylic acid esters co-polymer selected from methyl methacrylate-ethyl acrylate-
Butyl acrylate copolymer, methyl methacrylate-butyl acrylate-acrylic copolymer, methyl methacrylate-acrylic acid
At least one in butyl ester-acrylic acid-N hydroxymethyl acrylamide copolymer.
Wherein in one embodiment, the modified polyvinilidene dichloroethylene selected from acrylate modified polyvinylidene chloride and
At least one in polyurethane-modified polyvinylidene chloride.
Wherein in one embodiment, the mould inhibitor is natural extract class mould inhibitor, and the natural extract class is prevented
Mould dose carries selected from gingerol, catechin, citric acid, allicin, shitosan, sorbic acid, turmeric alcohol, cinnamomum camphora essential oil, Meng Zongzhu
Take at least one in thing, Hinokitiol and nisin.
Wherein in one embodiment, the resin be acrylic acid esters co-polymer, polyvinyl alcohol, polyvinylidene chloride,
Modified polyvinilidene dichloroethylene, ethylene-vinyl acetate analog copolymer, polyvinyl acetate copolymer and vinylacetate-butyl ester
During at least one in copolymer, anti-mildew fresh-keeping coating percentage composition by weight also includes the nertralizer less than 3%, institute
Nertralizer is stated at least one in sodium acid carbonate, triethylamine and ammoniacal liquor.
Wherein in one embodiment, the mould inhibitor is that non-natural extracts species mould inhibitor, the non-natural extract
Class mould inhibitor is selected from sodium Diacetate, potassium sorbate, sodium sorbate, potassium citrate, sodium citrate, calcium propionate, sodium ascorbate, anti-
Bad hematic acid potassium, sodium salicylate, trichlamide, dodecyl alanine, sodium isoascorbate, Kathon CG, nipagin esters, fumaric acid and
At least one during bacteriolyze is mould.
Wherein in one embodiment, the mould inhibitor contains natural extract class mould inhibitor and non-natural extracts species and prevents
Mould dose two kinds, it is 0.4～1.5 that the natural extract class mould inhibitor and the non-natural extract the mass ratio of species mould inhibitor:
1。
Wherein in one embodiment, the material of the bag body is paper, PET resin, PP resins, PA6 resins, EVA trees
Fat, EVOH resins, PVA resins or PLA resin.
Wherein in one embodiment, the cavity used for placing articles one end open, and the cavity used for placing articles is around the opening
Edge is equipped with locking belt, and the locking belt can seal the opening of the cavity used for placing articles.
Wherein in one embodiment, the anti-mildew fresh-keeping coating is obtained by following preparation method, the preparation method bag
Include following steps：
The resin, the solvent and the auxiliary agent are well mixed, mixed liquor is obtained；
The mixed liquor and the mould inhibitor are well mixed, the anti-mildew fresh-keeping coating is obtained.
Description of the drawings
Fig. 1 is the structure chart of the packaging bag of an embodiment；
Fig. 2 is the flow chart of the preparation method of the anti-mildew fresh-keeping coating of an embodiment.
Specific embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In accompanying drawing
Give the preferred embodiment of the present invention.But, the present invention can be realized in many different forms, however it is not limited to herein
Described embodiment.On the contrary, the purpose for providing these embodiments is to make the understanding to the disclosure more saturating
It is thorough comprehensive.
With reference to Fig. 1, the packaging bag 1 of an embodiment, including bag body 11 and anti-mildew fresh-keeping coating 12.Bag body 11 is provided with to be put
Thing cavity (figure is not marked).Inner surface of the anti-mildew fresh-keeping coating 12 located at cavity used for placing articles.
Preferably, the material of bag body 11 is paper, PET resin (polyethylene terephthalate), PP resins (poly- third
Alkene), PA6 resins (polyamide 6), EVA resin (ethene-polyvinyl acetate copolymer resin), EVOH resins (ethene-
Vinyl alcohol copolymer resin), PVA resins (polyvinyl alcohol resin) or PLA resin (linear aliphatic polyesters-polylactic resin).
It is furthermore preferred that the material of bag body 11 is PET and PP.PET and PP remains to keep excellent under conditions of temperature is up to 120 DEG C
Performance, and then anti-mildew fresh-keeping coating can be avoided to carry out being heat-treated the problem to form anti-mildew fresh-keeping breakdown of coating bag body 11.Can be with
Understand, the bag body 11 can be it is all with cavity used for placing articles can packing article sack.
Specifically in the present embodiment, the material of bag body 11 is PP resins.Specifically in the present embodiment, cavity used for placing articles one
End opening, and cavity used for placing articles is equipped with locking belt 13 around the edge of the opening, locking belt 13 can be close by the opening of cavity used for placing articles
Envelope.So packaging bag 1 has preferable sealing effectiveness, while fresh-keeping effect is further strengthened, also can more preferably strengthen and put
The fresh-keeping effect of the anti-mildew fresh-keeping coating of the inner surface of thing cavity.It is appreciated that there is no the grade of locking belt 13 for opening at other
During the structure of mouth sealing, also manually opening can be tightened into sealing or the sealing of opening is realized by rope, rubber ring etc..
The raw material of anti-mildew fresh-keeping coating 12 is anti-mildew fresh-keeping coating.Preferably, the thickness of anti-mildew fresh-keeping coating 12 be 0.5～
10μm.The thickness low LCL of anti-mildew fresh-keeping coating 12 then resin can not effective film forming, then anti-mildew fresh-keeping effect can not embody.And it is mould proof
The thickness of fresh-keeping coating 12 is blocked up, and not only cost increases, and can not be completely dried in heat treatment, it may appear that return viscous etc. bad
Phenomenon, and when not being completely dried, because outer surface is partially dried, and inside is still into liquid, during continuing to air-dry,
The situation for coating cracking occur is easy to due to due to internal natural drying, this also can greatly reduce anti-mildew fresh-keeping coating
Effect.The invention provides the anti-mildew fresh-keeping coating of an embodiment.
The anti-mildew fresh-keeping coating, by weight percentage composition include following component：Resin 20%～60%, solvent 30%～
70%th, mould inhibitor 0.5%～10% and auxiliary agent 0.3%～5%.
Wherein described resin is polyurethane, acrylic acid esters co-polymer, polyvinyl alcohol, polyvinylidene chloride, modified polyvinilidene
In dichloroethylene, ethylene-vinyl acetate analog copolymer, polyvinyl acetate copolymer and vinylacetate-acrylate copolymer
At least one.So resin is selected good with mould inhibitor intersolubility and can be dissolved in the resin of aqueous solvent, and mould inhibitor can not only filled
In being dispersed in resin, it is ensured that the effect of mould inhibitor, but also toxic solvent can be avoided from polluting the shortcoming of environment.
Resin is material of main part in the component, and the resin is high polymer of good performance, and itself will not go mouldy, and is made
Into coating surface it is fine and close, imporosity, it is thus possible to limit the absorption and dissolving of hydrone to greatest extent, and intermolecular powerful
Cohesiveness hydrone can be suppressed movable within, and then effectively suppress moisture turnover coating, reaching prevents from losing moisture
With the effect for absorbing moisture, keep the constant and fresh-keeping moisturizing of moisture.
It is furthermore preferred that the resin is polyurethane, acrylic acid esters co-polymer, polyvinyl alcohol, polyvinylidene chloride and changes
Property polyvinylidene chloride at least one, these resin chemistries compared with ethylene-vinyl acetate analog copolymer, poly-vinegar acid second
Enoate copolymer and vinylacetate-acrylate copolymer are more stable, when it is used for preservative film and contacts with food, with more safe guarantor
Barrier.
Preferably, acrylic acid esters co-polymer is selected from methyl methacrylate-ethyl acrylate-acrylic acid butyl ester copolymerization
Thing, methyl methacrylate-butyl acrylate-acrylic copolymer, methyl methacrylate-butyl acrylate-acrylic acid-N-
At least one in hydroxymethyl acrylamide copolymer.With methyl methacrylate-ethyl acrylate-acrylic acid acrylate copolymer
As a example by, it is formed by methyl methacrylate, three kinds of monomer copolymerizations of ethyl acrylate and butyl acrylate.
Preferably, polyvinyl alcohol is selected from least in polyvinyl alcohol 1788, polyvinyl alcohol 2088 and polyvinyl alcohol 2488
Kind.Polyvinyl alcohol 1788, polyvinyl alcohol 2088 and polyvinyl alcohol 2488 are water-soluble polyvinyl alcohol well.With polyvinyl alcohol
As a example by 1788, it is that the degree of polymerization is 1700, and alcoholysis degree is 88% polyvinyl alcohol.
Preferably, modified polyvinilidene dichloroethylene is selected from acrylate modified polyvinylidene chloride and polyurethane-modified poly- inclined two
At least one in vinyl chloride.The water soluble characteristic of polyurethane-modified polyvinylidene chloride is obviously improved.
Wherein, solvent is at least one in water and ethanol.Using polyurethane, polyvinyl alcohol, ethylene-vinyl acetate class
The water-soluble preferably resin such as copolymer, polyvinyl acetate copolymer, solvent is preferably water, to reach environmental protection and reduces cost
Effect.
Wherein, mould inhibitor is at least one that natural extract class mould inhibitor and non-natural are extracted in species mould inhibitor.It is excellent
Choosing, natural extract class mould inhibitor is selected from gingerol, catechin, citric acid, allicin, shitosan, sorbic acid, turmeric
At least one in alcohol, cinnamomum camphora essential oil, Meng's ancestor's bamboo extract, Hinokitiol and nisin.Preferably, non-natural extract
Class mould inhibitor is selected from sodium Diacetate, potassium sorbate, sodium sorbate, potassium citrate, sodium citrate, calcium propionate, sodium ascorbate, anti-
Bad hematic acid potassium, sodium salicylate, trichlamide, dodecyl alanine, sodium isoascorbate, Kathon CG, nipagin esters, fumaric acid and
At least one during bacteriolyze is mould.
Preferably, mould inhibitor contains natural extract class mould inhibitor and non-natural extracts two kinds of species mould inhibitor.So adopt
Be conducive to improving the mould proof agent content into resin with two kinds of mould inhibitors, and then improve anti-mold effect.Preferably, mould inhibitor is
When natural extract class mould inhibitor and non-natural extract two kinds of species mould inhibitor, natural extract class mould inhibitor and non-natural are extracted
The mass ratio of species mould inhibitor is 0.4～1.5:1.
Natural extract class mould inhibitor fungicidal properties in the basic conditions is preferable, and polyurethane sheet is as alkalescent.It is excellent
Choosing, when mould inhibitor contains natural extract class mould inhibitor, and resin is acrylic acid esters co-polymer, polyvinyl alcohol, gathers inclined two
Vinyl chloride, modified polyvinilidene dichloroethylene, ethylene-vinyl acetate analog copolymer, polyvinyl acetate copolymer and vinyl acetate
During at least one in ester-acrylate copolymer, anti-mildew fresh-keeping coating percentage composition by weight also includes the neutralization less than 3%
Agent, at least one of the nertralizer in sodium acid carbonate, triethylamine and ammoniacal liquor, the concentration of the ammoniacal liquor is not less than 3mol/
L.It is appreciated that nertralizer can be concentrated ammonia liquor.It is appreciated that mould inhibitor is non-natural extracts species mould inhibitor, in also can adding
And agent.
Preferably, auxiliary agent includes at least one in surfactant, emulsifying agent, wetting agent, defoamer and sagging inhibitor.
Wherein, surfactant is tween and sapn etc., and it is more uniform that surfactant can be such that mould inhibitor disperses in resin.Emulsifying agent
May advantageously facilitate water-soluble poor resin and form stable aqueous emulsion.
Above-mentioned anti-mildew fresh-keeping coating, resin is dissolved in solvent and adjusts its film forming by auxiliary agent, controls component proportion, makes
It can form surface compact, imporous coating, therefore, it is possible to limit the absorption and dissolving of hydrone to greatest extent, and high score
Cohesiveness between son can suppress hydrone movement wherein, and then effectively suppress moisture turnover coating, reach holding water
Divide the effect of constant and fresh-keeping moisturizing.Additionally, resin is good with mould inhibitor intersolubility so that mould inhibitor is well dispersed in resin,
Ensure the effect of mould inhibitor, but also toxic solvent can be avoided to pollute the shortcoming of environment.
Mould inhibitor intracellular and then the elimination of micro-organisms can be entered by the cell membrane of microorganism or prevent its germination in case
Only fungus growth, and then reach fresh-keeping effect steady in a long-term.
With reference to Fig. 2, the preparation method of above-mentioned anti-mildew fresh-keeping coating of the invention is comprised the following steps.
Step S110：Raw material is provided, percentage composition by weight includes：It is resin 20%～60%, solvent 30%～70%, anti-
Mould dose 0.5%～10% and auxiliary agent 0.3%～5%.
Step S120：Resin, solvent and auxiliary agent are well mixed, mixed liquor is obtained.
Specifically, the temperature of resin, solvent and auxiliary agent mixing is 30～65 DEG C in step S120.
Specifically, step S120 is comprised the following steps：Resin is dissolved in solvent, is 100～300 revs/min in rotating speed
Under be stirred and heated to 30～65 DEG C；Auxiliary agent is added, continues to stir 30～60min in the case where rotating speed is for 200～400 revs/min, obtained
To mixed liquor.So control temperature and stirring intensity, promote mixed liquor to be well mixed.
Specifically, when mould inhibitor contains natural extract class mould inhibitor, anti-mildew fresh-keeping coating percentage composition by weight is also wrapped
The nertralizer less than 3% is included, step S120 also includes step：Obtain adding the nertralizer to adjust mixed liquor after mixed liquor
PH value be 7～8.The pH that nertralizer adjusts mixed liquor is added to be the acid-base value for control system so that the acid-base value of system
It is close to as far as possible neutral so that the acid-base value of coating is close to neutrality, and then improves its feature of environmental protection.
Step S130：Mixed liquor and mould inhibitor are well mixed, anti-mildew fresh-keeping coating is obtained.
Mixed liquor and mould inhibitor are well mixed so that mould inhibitor is dispersed in inside resin, it is to avoid mould inhibitor is swimming
Amorph is soluble in water when resulting in coating, and the effective content of mould inhibitor declines and then reduces the problem of anti-mold effect.Mould inhibitor leads to
The cell membrane of microorganism is crossed into intracellular and then the elimination of micro-organisms or its germination is prevented to prevent fungus growth, and then is reached
Fresh-keeping effect steady in a long-term.
Preferably, mould inhibitor adds mixed liquor to mix with mixed liquor so that mode is added dropwise, so that mould inhibitor more fully divides
In being dispersed in resin, and avoid mould inhibitor free in a solvent as far as possible, and then improve the effective content of mould inhibitor.More preferably
, it is when mould inhibitor is that natural extract class mould inhibitor and non-natural extract two kinds of species mould inhibitor, two kinds of mould inhibitors are independent
And while drop in mixed liquor, to prevent two kinds of mould inhibitors, successively addition causes the latter's mould inhibitor more to be deposited with free state
In being solvent, causing can not reach preferably with reference to the problem of effect.
Preferably, mixed liquor and the condition of mould inhibitor mixing are 1～2h of mixing at 30～65 DEG C in step S130.Can be with
Understand, mould inhibitor after mould inhibitor completion of dropwise addition, mixed liquor and mould inhibitor is continued to mix 1～2h so that mode plus fashionable is added dropwise.
The stirring mixing in the case where rotating speed is for 500～800 revs/min of step S130.
The preparation method of above-mentioned anti-mildew fresh-keeping coating, process is simple, it is easy to accomplish, the anti-mildew fresh-keeping coating film forming for obtaining
It is good, surface compact, imporous anti-mildew fresh-keeping coating can be formed, it is thus possible to limit the absorption of hydrone and molten to greatest extent
Solution, and the cohesiveness between macromolecule can suppress hydrone movement wherein, and then effectively suppress moisture turnover coating, reach
To the effect for keeping the constant and fresh-keeping moisturizing of moisture.Additionally, mould inhibitor is dispersed in inside resin, it is to avoid mould inhibitor is with free
State there is a problem of soluble in water resulting in mould proof agent content during coating and declining and then reduce anti-mold effect.Mould inhibitor is by micro-
Biological cell membrane is into intracellular and then the elimination of micro-organisms or prevents its germination to prevent fungus growth, and then reaches long-term
Stable fresh-keeping effect.
The anti-mildew fresh-keeping coating is particularly well-suited to that the Storage periods such as fruit, bread and tobacco leaf are shorter, easily go mouldy in short-term and need and
When edible article it is fresh-keeping.
In concrete one embodiment wherein, anti-mildew fresh-keeping coating is coated and thermally treated prepared by anti-mildew fresh-keeping coating.
Anti-mildew fresh-keeping coating is through heat treatment so that resin crosslinks reaction and forms network structure, and mould inhibitor is dispersed in resin
Network structure in, obtain surface compact, imporous anti-mildew fresh-keeping coating, thus with preferably keeping the constant effect of moisture
Really；Mould inhibitor is dispersed in inside resin, moreover it is possible to effectively prevent from going mouldy, and then reaches preferable fresh-keeping effect.The mould proof guarantor
Fresh coating is particularly well-suited to that the Storage periods such as fruit, bread and tobacco leaf are shorter, easily go mouldy in short-term and need in time eat the fresh-keeping of article.
Preferably, the condition of heat treatment is to process 5～10s in 80～120 DEG C.Resin crosslinks under this condition reaction
Form fine and close network structure so that coating has the effect for preventing moisture from passing in and out.Due to the finite thickness of coating, heat treatment
Time is oversize will to affect the performance of coating.
Preferably, the condition of heat treatment for successively in 80～85 DEG C, 90～100 DEG C, 105～120 DEG C, 90～100 DEG C and
Process 1～2s at 80～85 DEG C respectively.So coating is heat-treated in the temperature field, the temperature field distribution gradient so that apply
Material film forming early stage gradually heats up, and the film forming later stage gradually lowers the temperature, and then improves the compactness of coating and ensure that coating will not ftracture.More
Preferably, the condition of heat treatment is to process 1.2s respectively at 80 DEG C, 90 DEG C, 120 DEG C, 100 DEG C and 85 DEG C successively.
With continued reference to Fig. 1, above-mentioned packaging bag 1 is the surface compact of anti-mildew fresh-keeping coating 12 of the inner surface of cavity used for placing articles, non-porous
Gap, and mould inhibitor is added with, thus keep moisture constant and the effect for preventing from going mouldy with preferable.The packaging bag 1 is special
Suitable for the Storage periods such as fruit, bread and tobacco leaf it is shorter, easily go mouldy in short-term and need in time eat the fresh-keeping of article.
It is concrete when preparing packaging bag 1, the bag bulk material for being provided with anti-mildew fresh-keeping coating 12 to be first obtained in the present embodiment,
Then it is made into packaging bag using anti-mildew fresh-keeping coating 12 as the inner surface of cavity used for placing articles.It is appreciated that in other embodiment
In, bag body 11 also can be first obtained, then the inner surface in cavity used for placing articles forms anti-mildew fresh-keeping coating 12, and then packaging bag is obtained
1。
It is below specific embodiment.
Embodiment 1
Raw material is provided, percentage composition by weight includes：Polyurethane resin 60%, water 30%, gingerol 5%, the and of tween 4%
Triethylamine 1%.
Polyurethane resin is soluble in water, it is stirred and heated to 50 DEG C in the case where rotating speed is for 300 revs/min；Auxiliary agent is added,
Rotating speed is continuation stirring 50min under 300 revs/min, obtains mixed liquor.The pH value for adding mixed liquor after triethylamine is 7.
Gingerol is added into mixed liquor, gingerol completion of dropwise addition to be added dropwise under mode is stirred in the case where rotating speed is as 600 revs/min
Afterwards, mixed liquor and gingerol are continued into the stirring mixing 1 in the case where rotating speed is for 600 revs/min.Cooling, obtains anti-mildew fresh-keeping coating.
Anti-mildew fresh-keeping coating is coated in substrate, then successively at 80 DEG C, 90 DEG C, 120 DEG C, 100 DEG C and 85 DEG C respectively
1.2s is processed, anti-mildew fresh-keeping coating is obtained.
Embodiment 2
Raw material is provided, percentage composition by weight includes：The resin 47% of polyvinyl alcohol 2488, water 40%, sorbic acid and turmeric
Root alcohol total amount 8%, tween 2% and sodium acid carbonate 3%.
The resin of polyvinyl alcohol 2488 is soluble in water, it is stirred and heated to 65 DEG C in the case where rotating speed is for 100 revs/min；Add
Auxiliary agent, continues to stir 30min in the case where rotating speed is for 200 revs/min, obtains mixed liquor.Add the pH value of mixed liquor after sodium acid carbonate
For 8.
Sorbic acid and turmeric alcohol are added into mixed liquor, sorb to be added dropwise under mode is stirred in the case where rotating speed is as 800 revs/min
After acid and turmeric alcohol completion of dropwise addition, mixed liquor, sorbic acid and turmeric alcohol are continued in the case where rotating speed is for 500～800 revs/min
Stirring mixing 2h.Cooling, obtains anti-mildew fresh-keeping coating.
Anti-mildew fresh-keeping coating is coated in substrate, then is located respectively at 85 DEG C, 95 DEG C, 110 DEG C, 90 DEG C and 80 DEG C successively
Reason 2s, obtains anti-mildew fresh-keeping coating.
Embodiment 3
Raw material is provided, percentage composition by weight includes：Polyurethane-modified polyvinylidene chloride resin 20%, water 70%, ten
Dialkyl group alanine 0.5% and tween 5%.
Polyurethane-modified polyvinylidene chloride resin is soluble in water, it is stirred and heated in the case where rotating speed is for 200 revs/min
60℃；Auxiliary agent is added, continues to stir 50min in the case where rotating speed is for 400 revs/min, obtain mixed liquor.
Dodecyl alanine is added into mixed liquor, dodecane to be added dropwise under mode is stirred in the case where rotating speed is as 500 revs/min
After base alanine completion of dropwise addition, mixed liquor and dodecyl alanine are continued to stir in the case where rotating speed is for 500～800 revs/min
Mixing 1.5h.Cooling, obtains anti-mildew fresh-keeping coating.
Anti-mildew fresh-keeping coating is coated in substrate, then successively at 83 DEG C, 100 DEG C, 105 DEG C, 95 DEG C and 82 DEG C respectively
1s is processed, anti-mildew fresh-keeping coating is obtained.
Embodiment 4
Raw material is provided, percentage composition by weight includes：Vinylacetate-acrylate copolymer 40%, water and ethanol (volume ratio
1:1) (mass ratio of Meng ancestor bamboo extract and sodium isoascorbate is 1 for total amount 48%, Meng ancestor bamboo extract and sodium isoascorbate:
1) total amount 10%, sapn 1.5% and concentrated ammonia liquor 0.4%.
Vinylacetate-acrylate copolymer is soluble in water, it is stirred and heated to 40 DEG C in the case where rotating speed is for 300 revs/min；
Auxiliary agent is added, continues to stir 50min in the case where rotating speed is for 300 revs/min, obtain mixed liquor.Add the pH of mixed liquor after concentrated ammonia liquor
It is worth for 7.5.
Meng ancestor bamboo extract and sodium isoascorbate while are stirred individually and in the case where rotating speed is as 800 revs/min in dropwise addition mode
Lower addition mixed liquor is mixed, after mould inhibitor completion of dropwise addition, mixed liquor, Meng ancestor bamboo extract and sodium isoascorbate is continued in rotating speed
For stirring mixing 2h under 800 revs/min.Cooling, obtains anti-mildew fresh-keeping coating.
Anti-mildew fresh-keeping coating is coated in substrate, then at 90 DEG C of process 10s, anti-mildew fresh-keeping coating is obtained.
Embodiment 5
Embodiment 5 is substantially the same manner as Example 4, and difference is that the mould inhibitor of embodiment 5 replaces with Hinokitiol and resists
Bad hematic acid potassium, and the mass ratio of Hinokitiol and potassium ascorbate is 0.428:1；Anti-mildew fresh-keeping coating is coated in substrate, then
5s is processed in 120 DEG C, anti-mildew fresh-keeping coating is obtained.
Embodiment 6
Embodiment 6 is substantially the same manner as Example 4, and difference is that the mould inhibitor of embodiment 6 replaces with Hinokitiol and resists
Bad hematic acid potassium, and the mass ratio of Hinokitiol and potassium ascorbate is 0.67:1；Anti-mildew fresh-keeping coating is coated in substrate, then at
80 DEG C of process 8s, obtain anti-mildew fresh-keeping coating.
Embodiment 7
Embodiment 7 is substantially the same manner as Example 4, and difference is that the mould inhibitor of embodiment 7 replaces with allicin and water
Poplar bacterium amine, and the mass ratio of allicin and trichlamide is 1.5:1.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more concrete and detailed, but and
Can not therefore be construed as limiting the scope of the patent.It should be pointed out that for one of ordinary skill in the art comes
Say, without departing from the inventive concept of the premise, some deformations and improvement can also be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be defined by claims.
Claims (10)
1. a kind of packaging bag, it is characterised in that including bag body and anti-mildew fresh-keeping coating, the bag body is provided with cavity used for placing articles,
Inner surface of the anti-mildew fresh-keeping coating located at the cavity used for placing articles；The raw material of the anti-mildew fresh-keeping coating is anti-mildew fresh-keeping painting
Material, anti-mildew fresh-keeping coating percentage composition by weight includes following component：Resin 20%～60%, solvent 30%～70%,
Mould inhibitor 0.5%～10% and auxiliary agent 0.3%～5%, wherein the resin is polyurethane, acrylic acid esters co-polymer, poly- second
Enol, polyvinylidene chloride, modified polyvinilidene dichloroethylene, ethylene-vinyl acetate analog copolymer, polyvinyl acetate copolymer
With at least one in vinylacetate-acrylate copolymer, the solvent is at least one in water and ethanol.
2. packaging bag as claimed in claim 1, it is characterised in that the acrylic acid esters co-polymer is selected from methyl methacrylate
Ester-ethyl acrylate-acrylic acid acrylate copolymer, methyl methacrylate-butyl acrylate-acrylic copolymer, methyl-prop
At least one in e pioic acid methyl ester-butylacrylate-acrylic acid-N hydroxymethyl acrylamide copolymer.
3. packaging bag as claimed in claim 1, it is characterised in that the modified polyvinilidene dichloroethylene is selected from acrylate modified
At least one in polyvinylidene chloride and polyurethane-modified polyvinylidene chloride.
4. packaging bag as claimed in claim 1, it is characterised in that the mould inhibitor is natural extract class mould inhibitor, described
Natural extract class mould inhibitor is selected from gingerol, catechin, citric acid, allicin, shitosan, sorbic acid, turmeric alcohol, cinnamomum camphora
At least one in essential oil, Meng's ancestor's bamboo extract, Hinokitiol and nisin.
5. packaging bag as claimed in claim 4, it is characterised in that the resin be acrylic acid esters co-polymer, polyvinyl alcohol,
Polyvinylidene chloride, modified polyvinilidene dichloroethylene, ethylene-vinyl acetate analog copolymer, polyvinyl acetate copolymer and vinegar
During at least one in vinyl acetate-acrylate copolymer, anti-mildew fresh-keeping coating percentage composition by weight also includes being less than
3% nertralizer, the nertralizer is at least one in sodium acid carbonate, triethylamine and ammoniacal liquor.
6. packaging bag as claimed in claim 1, it is characterised in that the mould inhibitor is that non-natural extracts species mould inhibitor, institute
State non-natural and extract species mould inhibitor selected from sodium Diacetate, potassium sorbate, sodium sorbate, potassium citrate, sodium citrate, propionic acid
Calcium, sodium ascorbate, potassium ascorbate, sodium salicylate, trichlamide, dodecyl alanine, sodium isoascorbate, Kathon CG, Buddhist nun
At least one during the golden ester of pool, fumaric acid and bacteriolyze are mould.
7. packaging bag as claimed in claim 1, it is characterised in that the mould inhibitor is natural extract class mould inhibitor and non-day
Two kinds of species mould inhibitor is so extracted, the natural extract class mould inhibitor and the non-natural extract the mass ratio of species mould inhibitor
For 0.4～1.5:1.
8. packaging bag as claimed in claim 1, it is characterised in that the body and/or the sealing be PET resin,
PP resins, PA6 resins, EVA resin, EVOH resins, PVA resins or PLA resin material, or the body and the sealing
It is papery.
9. packaging bag as claimed in claim 1, it is characterised in that the cavity used for placing articles one end open, and the cavity used for placing articles
Locking belt is equipped with around the edge of the opening, the locking belt can seal the opening of the cavity used for placing articles.
10. the packaging bag as described in any one of claim 1～9, it is characterised in that the anti-mildew fresh-keeping coating is by preparing as follows
Method is obtained, and the preparation method is comprised the following steps：
The resin, the solvent and the auxiliary agent are well mixed, mixed liquor is obtained；
The mixed liquor and the mould inhibitor are well mixed, the anti-mildew fresh-keeping coating is obtained.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611244335.3A CN106634130A (en) | 2016-12-29 | 2016-12-29 | Packaging bag |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611244335.3A CN106634130A (en) | 2016-12-29 | 2016-12-29 | Packaging bag |
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Family
ID=58835596
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| CN201611244335.3A Pending CN106634130A (en) | 2016-12-29 | 2016-12-29 | Packaging bag |
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| CN108193554A (en) * | 2017-12-29 | 2018-06-22 | 上海海洋大学 | A kind of preparation method of antibacterial and mouldproof fluid film |
| CN108192123A (en) * | 2017-12-29 | 2018-06-22 | 常德金德新材料科技股份有限公司 | It is a kind of that the method for anti-mildew fresh-keeping film and anti-mildew fresh-keeping film are prepared by coating machine |
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Application publication date: 20170510 |