A kind of anti-aging plastic packaging bag and preparation method thereof
Technical field
The present invention relates to packaging bag technical fields, more particularly to a kind of anti-aging plastic packaging bag and preparation method thereof.
Background technique
Packaging bag is used to be packaged in the surface of product, one very light, protectiveness appearance is formed around product, to reach
To dust-proof, grease proofing, moisture-proof, waterproof, sun-proof purpose, effective protection is carried out to product.Plastic packaging bag is a kind of
Raw material are widely used in industrial production and daily life.Plastics belong to synthesis high molecular material, also referred to as giant molecule or
Macromolecule, plastics largely have the characteristics that it is light, and have it is stable be not in chemically corrosion phenomena, plastics usually have
There are preferable impact resistance, wearability and the transparency, plastics have excellent insulating properties, and have lower thermal conductivity.
Common plastic packaging bag is mostly polyethylene plastic film or polypropylene plastic film, odorless nontoxic.But whether being
Polyethylene plastic film or polypropylene plastic film may all occur in each stage of its synthesis, processing, storage and final application
Rotten, a series of variations occur for the chemical composition and structure of material, i.e. material property degenerates, such as under yellowing, relative molecular weight
Drop, product surface cracking, gloss are lost, and impact strength, flexural strength, tensile strength and elongation etc. are more seriously caused
Mechanical property declines to a great extent, to influence the normal use of film, this phenomenon is referred to as aging.
It is seen in angle chemically, the either natural still synthesis of plastic material, all there is certain molecular structure,
Some of them position has some weak bonds, these weak bonds become the breach of chemical reaction naturally, and the essence of ageing of plastics is just
It is a kind of chemical reaction, i.e., is chemically reacted with weak bond, such as oxidation reaction is starting point and causes series of chemical, it
It can be caused by many reasons, such as heat, ultraviolet light, mechanical stress, high-energy radiation, electric field, microorganism, it can be individually a kind of
Factor, can also be with many factors collective effect, as a result, the molecular structure of high molecular material changes and average molecular matter
Amount decline generates crosslinking, so that material property degenerates, so that be not available.Wherein, ultraviolet light and heat is common cause aging
Factor, under the action of ultraviolet light and heat, hydroxyl or double bond in macromolecular chain structure are easy to happen degradation under the action of light
Reaction, saturated hydrocarbons high molecular polymer resolve into hydroxyl, hydrogen peroxide or double bond during use, photostability compared with
Difference.Currently, be usually in the process of material, be added light stabilizer, such as amine polyphenoils, phenols polyphenoils,
Organic compounds containing sulfur, to avoid the degradation with aging of material, still, these light stabilizers have certain toxicity mostly, to people
Body is harmful.Therefore, in order to enable plastic packaging bag muchly to protect product, need one kind effectively anti-aging and nontoxic
Plastic packaging bag.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of anti-aging plastic packaging bag and preparation method thereof, the preparation
Method and process is simple, easy to operate, and the anti-aging plastics packaging bag prepared has the function of shielding ultraviolet radiation of more wide spectrum, tool
There are stronger anti-aging effect and stronger bacteria resistance.
The present invention solves above-mentioned technical problem by following technological means:
A kind of anti-aging plastic packaging bag, the raw material components including following parts by weight:
45~65 parts of maleic anhydride modified polypropylene, 20~32 parts of starch, 1.5~4.0 parts of ageing resistance compounding agent, plasticizer
6~15 parts, 2~7 parts of salicylic acid modification of chitosan, 0.5~2 part of coupling agent, 0.3~1.0 part of defoaming agent, 2~5 parts of filler, food
With 0~0.8 part of pigment.
The ageing resistance compounding agent is by the ultraviolet shielded nano-TiO of wide spectrum2/ ZnO is through 3-aminopropyltriethoxysilane
Cladding, graft polypropylene nitrile, then be made by beta-cyclodextrin modified.
Titanium dioxide and zinc oxide all have good ultraviolet screener performance, and the ultraviolet screening ability of titanium dioxide exists
Medium wave band is better than nano zine oxide, and nano zine oxide is better than titanium dioxide in the ultraviolet screening ability of long-wave band, and the two combines,
It is capable of providing the function of shielding ultraviolet radiation of more wide spectrum, there is stronger anti-aging effect.By nano-titanium dioxide and zinc oxide
It is combined with each other, and carries out coating modification with 3-aminopropyltriethoxysilane, in order to be able to success graft polypropylene nitrile,
Using the compound obtained after beta-cyclodextrin modified, the anti-aging property and flexility of plastic packaging bag, β-can be improved
It is cyclodextrin modified mainly to play two, first is that protection polyacrylonitrile, stablizes its function, second is that making titanium dioxide and oxygen
The ultraviolet-shielding type for changing zinc can be more longlasting long-acting.Chitosan is a kind of native biopolymer, and structure is more special to be contained
There are free amine group and hydroxyl, these groups have good chemical reaction characteristic, and property is made it have, is mainly reflected in:
First is that the chitosan of macromolecular is adsorbed on microbial cell surface, one layer of polymeric membrane is formed, prevents nutriment to cell
Interior transport, to play sterilization and bacteriostasis effect;It is and intracellular negatively charged second is that small molecule chitosan enters in microbial cell
Substance combine, so that the normal physiological function of cell is affected, cause microorganism dead.Through the modified chitosan of salicylic acid
Multiple antibacterial activity centers are formd, antibacterial action is stronger.
Further, the nano-TiO2/ ZnO is with rutile TiO2Nanosphere is core, and ZnO nanorod is the porous micro- of shell
Spherical structure.
Further, the nano-TiO2/ ZnO is with (NH4)2CO3For precipitating reagent, using coprecipitation in rutile TiO2
Nanometer ball surface coats ZnO, calcines the porous microsphere that average grain diameter obtained is 100nm.
Further, the TiO2Nanosphere is made using solvent-thermal method, the nano-TiO2TiO in/ZnO2Quality be
1~1.3 times of ZnO.
Further, the coupling agent is titanate coupling agent, and the defoaming agent is silicone emulsion or high-carbon alcohol fatty acid ester
One of compound, the filler are nanometer calcium carbonate.
The invention also discloses the preparation methods of above-mentioned anti-aging plastic packaging bag, and steps are as follows:
S1. raw material is weighed, and weighs each raw material of corresponding parts by weight respectively.
S2. heating stirring in high-speed mixer is added in starch gelatinization, starch and water 1:100 in mass ratio, makes starch gelatinization.
S3. maleic anhydride modified polypropylene, plasticizer, coupling agent, Yu Wendu are added into high-speed mixer for stir mixing
105 DEG C, revolving speed 200r/min 20~30min of stirring, then raise temperature to 120 DEG C, and the modified shell of ageing resistance compounding agent, salicylic acid is added
Glycan, defoaming agent, filler and edible pigment, revolving speed keep 350r/min to stir 20~30min, obtain mixture.
S4. Blown Film produces mixture into single screw extrusion machine, 165~175 DEG C of progress heat of control processing temperature
Molten extrusion-blown modling film forming, subsequent bag making are cut, and heat-sealing is printed to get plastic packaging bag is arrived.
The maleic anhydride modified polypropylene is on polypropylene using pre-irradiation grafting method grafted maleic anhydride.
Further, the ageing resistance compounding agent is by nano-TiO2/ ZnO is coated through 3-aminopropyltriethoxysilane, is obtained
To TiO2/ ZnO-APTES is added in dichloromethane solvent, and 2- bromine isobutyl acylbromide is added and reacts to obtain initiator, and initiator is logical
The catalyst system for crossing pentamethyl-diethylenetriamine and cuprous bromide composition, in nano-TiO2It is free that the surface /ZnO carries out atom transfer
Base polymerization reaction graft polypropylene nitrile, obtains TiO2/ ZnO-PAN is most modified through beta-cyclodextrin room temperature ultrasonic wave afterwards, dry system
?.
Further, the ultrasound parameter of the beta-cyclodextrin ultrasonic wave modification is 22~25kHz of frequency, power 180W, time
10~20min.
Further, the salicylic acid modification of chitosan is to be esterified using Dicyclohexylcarbodiimide as dehydrating agent using condensation
Method carries out esterification modification to chitosan with salicylic acid and is made.
Further, the salicylic acid modification of chitosan prepare it is as follows: being dissolved in mass concentration with chitosan is 1.5%
In glacial acetic acid solution, it is slowly dropped into benzaldehyde, for 24 hours in stirring at normal temperature reaction, refrigerated centrifuge, it is heavy to be washed with ethyl alcohol and deionized water
Starch after vacuum drying, is dissolved in petroleum ether, and salicylic acid and 4-dimethylaminopyridine is added, and stirs under the conditions of ice-water bath anti-
10min is answered, Dicyclohexylcarbodiimide is added, is filtered after reacting 3h, filter residue is washed with water for several times, and volume fraction is added after dry
To stir in 2% hydrochloric acid solution, filtering after immersion, it is dried to obtain salicylic acid modification of chitosan.
The raw material for preparing of plastic packaging bag of the invention has used ageing resistance compounding agent, contains in the ageing resistance compounding agent and receives
Rice TiO2/ ZnO is capable of providing the function of shielding ultraviolet radiation of more wide spectrum, and after graft polypropylene nitrile, further improves plastics
The anti-aging property and flexility of packaging bag keep its performance more stable persistently after beta-cyclodextrin modified;Prepare raw material also
The modified chitosan of salicylic acid is used, the antibacterial activity center through the modified chitosan of salicylic acid is increased, and is had stronger
Antibacterial and bacteriostasis, avoid bacterium from causing erosion damage to plastic packaging bag, plastic packaging bag improved in terms of microorganism
Anti-aging property.
The preparation method simple process of anti-aging plastic packaging bag of the invention, easy to operate, the equipment cost used
It is lower.
Specific embodiment
Below with reference to specific embodiment, the present invention is described in detail:
The anti-aging plastic packaging bag of one kind of the invention, the raw material components including following parts by weight: maleic anhydride modified
45~65 parts of polypropylene, 20~32 parts of starch, 1.5~4.0 parts of ageing resistance compounding agent, 6~15 parts of plasticizer, the modified shell of salicylic acid
2~7 parts of glycan, 0.5~2 part of coupling agent, 0.3~1.0 part of defoaming agent, 2~5 parts of filler, 0~0.8 part of edible pigment.It is therein
Maleic anhydride modified polypropylene is to be made using pre-irradiated method using polypropylene, maleic acid and acetone as main raw material(s), that is, take horse
Carry out acid anhydrides to be dissolved in acetone soln, prepare and obtain the solution that maleic anhydride mass concentration is 5%, is added and passes through high-power electron beam
Irradiated polypropylene carries out ultrasonic wave mixing 45min, reacts 5h under conditions of 95 DEG C, reaction product is dried to obtain
Maleic anhydride modified polypropylene, and the grafting rate for measuring its maleic anhydride is 0.52%.
The coupling agent that the present invention uses is titanate coupling agent, and defoaming agent is that silicone emulsion or higher alcohols are fatty acid ester compounded
One of object, filler are nanometer calcium carbonate.Ageing resistance compounding agent is by the ultraviolet shielded nano-TiO of wide spectrum2/ ZnO is through 3- amino
Propyl-triethoxysilicane cladding, graft polypropylene nitrile, then be made by beta-cyclodextrin modified, nano-TiO2/ ZnO is with rutile
TiO2Nanosphere is core, and ZnO nanorod is the porous microsphere structure of shell, the nano-TiO2/ ZnO is with (NH4)2CO3For precipitating reagent,
Using coprecipitation in rutile TiO2Nanometer ball surface coats ZnO, and calcining average grain diameter obtained is the porous micro- of 100nm
Ball.The nano-TiO that the present invention uses2/ ZnO's the preparation method is as follows:
Embodiment one: nano-TiO2The preparation of/ZnO
The nano-TiO of the present embodiment2TiO used in the preparation of/ZnO2Nanosphere is made using solvent-thermal method, by TiO2
Nanosphere is added in deionized water, and ultrasonic wave disperses to be made into the solution of 1.5mol/L, adds and TiO2Equimolar amounts
ZnSO4·7H2O, stirring make its ZnSO4·7H2O dissolution, finally stirring instills the (NH of 1.5mol/L4)2CO3Solution makes its pH
Value is maintained at 7 or so, after titration, solution is gone in the stainless steel high pressure water heating kettle for being equipped with polytetrafluoroethyllining lining,
In 120 DEG C of insulation reaction 1h, cooled to room temperature pours out reaction product, after being centrifuged, washing, after 85 DEG C of dry 12h,
It being transferred in Muffle furnace, under air atmosphere, is warming up to 450 DEG C with the speed of 5 DEG C/min, calcines 1.5h, taking-up is cooled to room temperature,
Obtain nano-TiO2/ZnO.The nano-TiO that passage capacity characterization discovery is prepared2The centre of/ZnO is TiO2Ball, TiO2Ball
The outside of core is that the porous shell being self-assembly of by ZnO nanorod measures preparation to form porous microballoon core-shell structure
Nano-TiO out2The average grain diameter of/ZnO is distributed within the scope of 60~120nm in 100nm, majority, and measures receiving of preparing
Rice TiO2TiO in/ZnO2Quality be 1~1.3 times of ZnO.
The nano-TiO being prepared using embodiment one2/ ZnO is used to prepare ageing resistance compounding agent, and preparation method is such as
Under:
Embodiment two: the preparation of ageing resistance compounding agent
Take nano-TiO2/ ZnO and toluene are mixed by quality 1:25, and carry out ultrasonic wave dispersion 20min, are then added 4 times
TiO2The 3-aminopropyltriethoxysilane of quality, in 85 DEG C of progress return stirring mixing 6h, centrifuge separation, and with toluene into
Row centrifuge washing, the TiO being dried to obtain2/ ZnO-APTES is added in dichloromethane solvent, and ice bath stirring is added triethylamine and promotes
Compatibility, then be slowly dropped into 2- bromine isobutyl acylbromide and be stirred to react 20h, stands 5h, and centrifugal drying obtains initiator, by initiator,
Methyl phenyl ethers anisole and cuprous bromide 1:10:1 in mass ratio are mixed, and under the protective effect of nitrogen, pentamethyl divinyl is added
Triamine and acrylonitrile react 5h in 80 DEG C of reflux condensation modes, and the product after reaction is diluted with methyl phenyl ethers anisole, precipitated in methyl alcohol, is used in combination
The aqueous acetone solution centrifuge washing that volumetric concentration is 75%, is dried to obtain TiO2/ ZnO-PAN, by TiO2β-ring is added in/ZnO-PAN
Ultrasonic wave is carried out in dextrin in aqueous solution and modifies 100min, and ultrasound parameter is 22~25kHz of frequency, power 180W, and centrifugal drying obtains
To ageing resistance compounding agent.
Embodiment three: the preparation of salicylic acid modification of chitosan
20g chitosan is dissolved in the glacial acetic acid solution that every mass per liter concentration is 1.5%, is slowly dropped into 60mL benzaldehyde, often
Temperature is stirred to react for 24 hours, refrigerated centrifuge, with ethyl alcohol and deionized water washing sediment, after vacuum drying, is dissolved in petroleum ether, is added
Enter 70g salicylic acid and 4-dimethylaminopyridine, after being stirred to react 5h under the conditions of ice-water bath, 70g Dicyclohexylcarbodiimide is added
It being filtered after reacting 2h, filter residue is washed with water for several times, and it is dry, it is added in the hydrochloric acid solution that volume fraction is 2% and is taken out after stirring, immersion
Filter obtains salicylic acid modification of chitosan.
Example IV: the preparation of plastic packaging bag
The preparation method of the anti-aging plastic packaging bag of one kind of the present embodiment, comprising the following steps:
S1. raw material is weighed, and weighs each raw material of corresponding weight by following parts by weight respectively:
45 parts of maleic anhydride modified polypropylene, 32 parts of starch, 4.0 parts of ageing resistance compounding agent, 6 parts of plasticizer, salicylic acid changes
2 parts of chitosan, 0.5 part of coupling agent, 0.3 part of silicone emulsion, 2 parts of filler, 0 part of edible pigment of property.
Load weighted starch and water 1:100 in mass ratio are added in high-speed mixer and are heated with stirring to by S2. starch gelatinization
90 DEG C, make starch gelatinization in pulpous state.
S3. load weighted maleic anhydride modified polypropylene, plasticizer, coupling are added into high-speed mixer for stir mixing
Agent, 105 DEG C of Yu Wendu, revolving speed 200r/min stir 20~30min, then raise temperature to 120 DEG C, and ageing resistance compounding agent, water is added
Poplar acid modification of chitosan, silicone emulsion, filler and edible pigment, revolving speed keep 350r/min to stir 20~30min, are mixed
Material.
S4. Blown Film produces mixture into single screw extrusion machine, and 165 DEG C of processing temperature of control carries out hot melt and squeezes
Blown Film out, subsequent bag making are cut, heat-sealing, are printed to get plastic packaging bag is arrived.
Performance detection is carried out to the plastic packaging bag that the present embodiment is prepared, bacteriostasis property measurement is carried out, by large intestine bar
Bacterium, staphylococcus aureus and Pseudomonas aeruginosa are inoculated into respectively in corresponding culture medium, are activated 12h at 35 DEG C, 200rpm, are taken
Plastics package bag webs 5 of 1 × 1cm are put into 50mL bacteria suspension, and not plus the original bacteria suspension of plastics package bag webs is as control
All bacteria suspensions are placed in 35 DEG C, 200rpm culture 5h, investigate biocidal property, measure plastic packaging bag manufactured in the present embodiment by group
Bacteriostasis rate to Escherichia coli is 86%, and the bacteriostasis rate to staphylococcus aureus is 79%, and the bacteriostasis rate to Pseudomonas aeruginosa is
83%;The anti-aging property for the plastic packaging bag that detection the present embodiment is prepared, places 260 in 150 DEG C of environment for it
It, does not generate rotten, and thermo oxidative stability reaches 150 days or more in water, and photostability reaches 190 days or more, has stronger
Anti-aging property.
Embodiment five: the preparation of plastic packaging bag
The preparation method of the anti-aging plastic packaging bag of one kind of the present embodiment, comprising the following steps:
S1. raw material is weighed, and weighs each raw material of corresponding weight by following parts by weight respectively:
65 parts of maleic anhydride modified polypropylene, 20 parts of starch, 1.5 parts of ageing resistance compounding agent, 15 parts of plasticizer, salicylic acid changes
7 parts of chitosan of property, 2 parts of coupling agent, 1 part of the fatty acid ester compounded object of higher alcohols, 5 parts of filler, 0.8 part of edible pigment.
Load weighted starch and water 1:100 in mass ratio are added in high-speed mixer and are heated with stirring to by S2. starch gelatinization
90 DEG C, make starch gelatinization in pulpous state.
S3. load weighted maleic anhydride modified polypropylene, plasticizer, coupling are added into high-speed mixer for stir mixing
Agent, 105 DEG C of Yu Wendu, revolving speed 200r/min stir 20~30min, then raise temperature to 120 DEG C, and ageing resistance compounding agent, water is added
Poplar acid modification of chitosan, the fatty acid ester compounded object of higher alcohols, filler and edible pigment, revolving speed holding 350r/min stirring 20~
30min obtains mixture.
S4. Blown Film produces mixture into single screw extrusion machine, and 175 DEG C of processing temperature of control carries out hot melt and squeezes
Blown Film out, subsequent bag making are cut, heat-sealing, are printed to get plastic packaging bag is arrived.
Performance detection is carried out to the plastic packaging bag that the present embodiment is prepared, bacteriostasis property measurement is carried out, by large intestine bar
Bacterium, staphylococcus aureus and Pseudomonas aeruginosa are inoculated into respectively in corresponding culture medium, are activated 12h at 35 DEG C, 200rpm, are taken
Plastics package bag webs 5 of 1 × 1cm are put into 50mL bacteria suspension, and not plus the original bacteria suspension of plastics package bag webs is as control
All bacteria suspensions are placed in 35 DEG C, 200rpm culture 5h, investigate biocidal property, measure plastic packaging bag manufactured in the present embodiment by group
Bacteriostasis rate to Escherichia coli is 88%, and the bacteriostasis rate to staphylococcus aureus is 75%, and the bacteriostasis rate to Pseudomonas aeruginosa is
79%;The anti-aging property for the plastic packaging bag that detection the present embodiment is prepared, places 285 in 150 DEG C of environment for it
It, does not generate rotten, and thermo oxidative stability reaches 163 days or more in water, and photostability reaches 195 days or more, has stronger
Anti-aging property.
Embodiment six: the preparation of plastic packaging bag
The preparation method of the anti-aging plastic packaging bag of one kind of the present embodiment, comprising the following steps:
S1. raw material is weighed, and weighs each raw material of corresponding weight by following parts by weight respectively:
50 parts of maleic anhydride modified polypropylene, 25 parts of starch, 2.0 parts of ageing resistance compounding agent, 10 parts of plasticizer, salicylic acid changes
4 parts of chitosan, 1.5 parts of coupling agent, 0.5 part of silicone emulsion, 3 parts of filler, 0.2 part of edible pigment of property.
Load weighted starch and water 1:100 in mass ratio are added in high-speed mixer and are heated with stirring to by S2. starch gelatinization
90 DEG C, make starch gelatinization in pulpous state.
S3. load weighted maleic anhydride modified polypropylene, plasticizer, coupling are added into high-speed mixer for stir mixing
Agent, 105 DEG C of Yu Wendu, revolving speed 200r/min stir 20~30min, then raise temperature to 120 DEG C, and ageing resistance compounding agent, water is added
Poplar acid modification of chitosan, silicone emulsion, filler and edible pigment, revolving speed keep 350r/min to stir 20~30min, are mixed
Material.
S4. Blown Film produces mixture into single screw extrusion machine, and 170 DEG C of processing temperature of control carries out hot melt and squeezes
Blown Film out, subsequent bag making are cut, heat-sealing, are printed to get plastic packaging bag is arrived.
Performance detection is carried out to the plastic packaging bag that the present embodiment is prepared, bacteriostasis property measurement is carried out, by large intestine bar
Bacterium, staphylococcus aureus and Pseudomonas aeruginosa are inoculated into respectively in corresponding culture medium, are activated 12h at 35 DEG C, 200rpm, are taken
Plastics package bag webs 5 of 1 × 1cm are put into 50mL bacteria suspension, and not plus the original bacteria suspension of plastics package bag webs is as control
All bacteria suspensions are placed in 35 DEG C, 200rpm culture 5h, investigate biocidal property, measure plastic packaging bag manufactured in the present embodiment by group
Bacteriostasis rate to Escherichia coli is 88%, and the bacteriostasis rate to staphylococcus aureus is 81%, and the bacteriostasis rate to Pseudomonas aeruginosa is
83%;The anti-aging property for the plastic packaging bag that detection the present embodiment is prepared, places 290 in 150 DEG C of environment for it
It, does not generate rotten, and thermo oxidative stability reaches 175 days or more in water, and photostability reaches 201 days or more, has stronger
Anti-aging property.
Embodiment seven: the preparation of plastic packaging bag
The preparation method of the anti-aging plastic packaging bag of one kind of the present embodiment, comprising the following steps:
S1. raw material is weighed, and weighs each raw material of corresponding weight by following parts by weight respectively:
50 parts of maleic anhydride modified polypropylene, 25 parts of starch, 3.0 parts of ageing resistance compounding agent, 10 parts of plasticizer, salicylic acid changes
6 parts of chitosan, 1.5 parts of coupling agent, 0.5 part of silicone emulsion, 3 parts of filler, 0.3 part of edible pigment of property.
Load weighted starch and water 1:100 in mass ratio are added in high-speed mixer and are heated with stirring to by S2. starch gelatinization
90 DEG C, make starch gelatinization in pulpous state.
S3. load weighted maleic anhydride modified polypropylene, plasticizer, coupling are added into high-speed mixer for stir mixing
Agent, 105 DEG C of Yu Wendu, revolving speed 200r/min stir 20~30min, then raise temperature to 120 DEG C, and ageing resistance compounding agent, water is added
Poplar acid modification of chitosan, silicone emulsion, filler and edible pigment, revolving speed keep 350r/min to stir 20~30min, are mixed
Material.
S4. Blown Film produces mixture into single screw extrusion machine, and 170 DEG C of processing temperature of control carries out hot melt and squeezes
Blown Film out, subsequent bag making are cut, heat-sealing, are printed to get plastic packaging bag is arrived.
Performance detection is carried out to the plastic packaging bag that the present embodiment is prepared, bacteriostasis property measurement is carried out, by large intestine bar
Bacterium, staphylococcus aureus and Pseudomonas aeruginosa are inoculated into respectively in corresponding culture medium, are activated 12h at 35 DEG C, 200rpm, are taken
Plastics package bag webs 5 of 1 × 1cm are put into 50mL bacteria suspension, and not plus the original bacteria suspension of plastics package bag webs is as control
All bacteria suspensions are placed in 35 DEG C, 200rpm culture 5h, investigate biocidal property, measure plastic packaging bag manufactured in the present embodiment by group
Bacteriostasis rate to Escherichia coli is 95%, and the bacteriostasis rate to staphylococcus aureus is 88%, and the bacteriostasis rate to Pseudomonas aeruginosa is
87%;The anti-aging property for the plastic packaging bag that detection the present embodiment is prepared, places 300 in 150 DEG C of environment for it
It, does not generate rotten, and thermo oxidative stability reaches 200 days or more in water, and photostability reaches 213 days or more, has stronger
Anti-aging property.
The above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to preferred embodiment to this hair
It is bright to be described in detail, those skilled in the art should understand that, it can modify to technical solution of the present invention
Or equivalent replacement should all cover without departing from the objective and range of technical solution of the present invention in claim of the invention
In range.Technology not described in detail in the present invention, shape, construction portion are well-known technique.