CN106750775A - A kind of biodegradable additive and the food packaging plastic products being prepared from using the additive - Google Patents

A kind of biodegradable additive and the food packaging plastic products being prepared from using the additive Download PDF

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Publication number
CN106750775A
CN106750775A CN201611109685.9A CN201611109685A CN106750775A CN 106750775 A CN106750775 A CN 106750775A CN 201611109685 A CN201611109685 A CN 201611109685A CN 106750775 A CN106750775 A CN 106750775A
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temperature
additive
mass
iron powder
biodegradable
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陆海荣
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Suzhou Tianqian New Material Science & Technology Co Ltd
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Suzhou Tianqian New Material Science & Technology Co Ltd
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Priority to CN201611109685.9A priority Critical patent/CN106750775A/en
Publication of CN106750775A publication Critical patent/CN106750775A/en
Priority to PCT/CN2017/108227 priority patent/WO2018099227A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • 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
    • C08K9/00—Use of pretreated ingredients
    • C08K9/04—Ingredients treated with organic substances
    • C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • 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
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/08—Metals
    • 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
    • C08K9/00—Use of pretreated ingredients
    • C08K9/04—Ingredients treated with organic substances
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/9258—Velocity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/04—Homopolymers or copolymers of ethene
    • C08J2423/08—Copolymers of ethene
    • 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
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/08—Metals
    • C08K2003/0856—Iron
    • 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
    • C08K2201/00—Specific properties of additives
    • C08K2201/002—Physical properties
    • C08K2201/003—Additives being defined by their diameter
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/06—Biodegradable
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/16—Applications used for films
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/06—Properties of polyethylene
    • C08L2207/066—LDPE (radical process)

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Wrappers (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Biological Depolymerization Polymers (AREA)

Abstract

The present invention relates to a kind of biodegradable additive, it is made up of low density polyethylene (LDPE), superfine iron powder, silane coupler and titanate coupling agent, and the proportioning of each component is as follows：The mass % of superfine iron powder 5~10, the mass % of silane coupler 0.01~0.20, the mass % of metatitanic acid coupling agent 0.02~0.40, balance of low density polyethylene (LDPE).Packaging material for food the invention further relates to the preparation method of above-mentioned biodegradable additive and comprising the mass % of above-mentioned biodegradable additive 1~3, such as polyethylene film.The results show, biodegradable plastics product of the invention meets national regulation, can be used for packaging for foodstuff.

Description

A kind of biodegradable additive and using the additive be prepared from it is food packaging Plastic products
Technical field
The present invention relates to a kind of biodegradable additive, it can assign and be difficult to biodegradable plastic package material with good Good biodegradability, the invention further relates to the food packaging plastic products being prepared from using the additive, particularly Add the polyethylene film material that the biodegradable additive is prepared from.
Background technology
Because good and cheap, durable in use and anti-microbial property is good, is widely used in food packaging applications for plastic products.However, with Widely using with plastic products such as plastic convenient bag, plastic sheetings, " white pollution " problem is also increasingly highlighted.This be due to The inherent life-span (from finished product to complete natural decomposition) of plastic products is considerably longer than its service life.In plastics it is durable Property, causes as do not processed it, and nature and cumulative is present in for a long time.Current solution to this problem master There is buried and burning etc..Buried to occupy cultivated land, polluted underground water is former, change soil texture, influence plant normal growth, and into This is higher；Burning is current the most widely used white-pollution control method, and speed is fast, low cost, but significant drawback is band Atmosphere pollution is additionally carried out.
The technical scheme of biodegradable plastics has been proposed, because biodegradable plastics can be in natural conditions such as Pollutant is not produced after natural degradation under the influence of ultraviolet, rainwater etc., and degraded, therefore, it is possible to fundamentally solve this Problem.At present the biodegradable plastics developed have PLA, poly butylene succinate, polycaprolactone, polyvinyl alcohol, Poly-beta-hydroxy-butyrate, PHA, aliphatic aromatic copolymer etc..Although biodegradable plastic has degraded Volume reduces afterwards, without burning, can be made into compost back to nature.But, the high expensive of biodegradable plastics, physical mechanics Poor performance, anti-microbial property is poor, causes to be difficult to be promoted on a large scale in food packaging applications.
In consideration of it, proposing following problem：It has been effectively combined how the inherent life-span of common plasticses and service life Come, i.e. property indices meet the requirements when in use to make the plastics that can not be degraded, can be rapid after service life terminates Decompose, to avoid the appearance of white pollution.
The content of the invention
Regarding to the issue above, traditional plastic products biodegradability can be assigned it is an object of the invention to provide a kind of Biodegradable additive, prepare the method for the biodegradable additive, add the modeling that the biodegradable additive is prepared from Material products, are particularly suitable for the polyethylene film of food service industry.
To reach above-mentioned purpose, the present invention is adopted the following technical scheme that：
A specific embodiment of the invention, there is provided a kind of biodegradable additive, it is by low density polyethylene Alkene, superfine iron powder, silane coupler and titanate coupling agent composition, the proportioning of each component are as follows：The matter of superfine iron powder 5~10 Amount %, the mass % of silane coupler 0.01~0.20, the mass % of metatitanic acid coupling agent 0.02~0.40, balance of low density polyethylene Alkene.
Biodegradable additive according to an embodiment of the invention, wherein, the superfine iron powder particle diameter be 5 microns with Under, consumption is 8 mass %.
Biodegradable additive according to an embodiment of the invention, wherein, the silane coupler is vinyl three Ethoxysilane.
Biodegradable additive according to an embodiment of the invention, wherein, the metatitanic acid coupling agent is isopropyl three (dioctylphyrophosphoric acid acyloxy) titanate esters.
An a kind of specific embodiment of the invention, there is provided side for preparing above-mentioned biodegradable additive Method, comprises the steps of：Step one：Each component is weighed in proportion, then with silane coupler and metatitanic acid coupling agent to described super Thin iron powder is surface-treated；Step 2：The superfine iron powder and polyethylene of the gained in the step one are put at a high speed Mixing equipment stirring mixing, is obtained well mixed material；Step 3：The material that will be obtained by the step 2 adds double spiral shells Granulation in bar comminutor.
According to one embodiment of present invention, there is provided a kind of method for preparing above-mentioned biodegradable additive, wherein, In the step 2, the rotating speed of the high speed mixing equipment is 500rpm, and temperature is 60 DEG C, and incorporation time is 10 minutes.
According to one embodiment of present invention, there is provided a kind of method for preparing above-mentioned biodegradable additive, wherein, In the step 3, the draw ratio of the dual-screw pelletizer is 40, will be secondly area's temperature is set as maximum temperature, i.e., 180 DEG C And the temperature of setting is kept, and area's temperature is set to lower than two area's temperature 10 DEG C, Jiang Sanqu, four area's temperature are set to and two area's phases Together, up to head is gradually reduced with gradient since 5th area, holding head temperature is steady temperature (in the range of 130~150 DEG C).
An a kind of specific embodiment of the invention, there is provided packaging material for food, it includes above-mentioned biological drop Solution additive 1~3 mass %.
An a kind of specific embodiment of the invention, there is provided polyethylene film, it includes above-mentioned biological drop Solution additive 1~3 mass %.
Biodegradable additive of the invention can assign various plastic products with biodegradability, i.e. add this hair After bright biodegradable additive, it is impossible to which property indices meet the requirements the common plastics of degraded when in use, are using Can be decomposed rapidly after end-of-life, so as to avoid the appearance of white pollution.Using biodegradable additive preparation Into food packaging plastic products such as polyethylene film meet requirement of the country to food service industry, can be used in food bag Dress.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiment, to the present invention It is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the present invention, limit is not used to The fixed present invention.
The preparation of biodegradable additive
Biodegradable additive of the invention is prepared by following raw material：The matter of superfine iron powder 5~10 below 5 microns of particle diameter Amount % (preferably 8 mass %), the mass % of silane coupler 0.01~0.20, the mass % of metatitanic acid coupling agent 0.02~0.40, surplus It is low density polyethylene (LDPE).
In one further embodiment, the silane coupler is VTES, the metatitanic acid idol Connection agent is isopropyl three (dioctylphyrophosphoric acid acyloxy) titanate esters, and the low density polyethylene (LDPE) is using the relatively low low-density of fusing point Polyethylene, its consumption is 91.4~92.97 mass %.
Biodegradable additive of the invention is prepared from by following steps：
Step one：Each composition of above-mentioned mass percent is weighed, and with silane coupler and metatitanic acid coupling agent to ultra-fine iron Powder is surface-treated；
Step 2：Superfine iron powder and polyethylene after surface treatment through step one is put into high speed mixing equipment Row stirring mixing, wherein, the rotating speed of high speed mixing equipment is set to 500rpm, temperature is set to 60 DEG C, and incorporation time is set to 10 points Clock；
Step 3：The uniform mixed material that will be obtained by step 2 is added in dual-screw pelletizer, is made and is gathered Vinyl plastics particle has the particle of identical granular size, i.e. be made biodegradable additive.The wherein length of dual-screw pelletizer Footpath ratio is 40, and the temperature control of dual-screw pelletizer is extremely important, and two area's temperature of setting are maximum temperature (180 DEG C), keep setting Fixed temperature, makes an area than low 10 DEG C or so of two area's temperature, makes 3rd area, four area's temperature essentially identical with 2nd area, since 5th area Until head is gradually reduced by gradient, holding head temperature is steady temperature (130~150 DEG C).
Embodiment 1
Table 1：The composition of biodegradable additive 1
Component Content (quality %)
Superfine iron powder 8
Silane coupler 0.01
Metatitanic acid coupling agent 0.2
Low density polyethylene (LDPE) 91.79
First using the silane coupler and metatitanic acid coupling agent of the percetage by weight in table 1 to the superfine iron powder of predetermined content It is surface-treated；Then the superfine iron powder and low density polyethylene (LDPE) after surface treatment are put into mixer together to be mixed Close；Mixed material is added in dual-screw pelletizer, is made identical with vinyon shape of particle, size is similar Particle.
Embodiment 2
Table 2：The composition of biodegradable additive 2
In addition to mass percent difference (as shown in table 2), biodegradation is prepared using with the preparation method in embodiment 1 Additive.
Embodiment 3
Table 3：The composition of biodegradable additive 3
Component Content (quality %)
Superfine iron powder 8
Silane coupler 0.2
Metatitanic acid coupling agent 0.4
Low density polyethylene (LDPE) 91.4
In addition to mass percent difference (as shown in table 3), biodegradation is prepared using with the preparation method in embodiment 1 Additive.
Biodegradable additive of the invention is applied to the additive of packaging material for food, to assign its biological degradability Can, thus, when during use, the packaging material for food can show sufficient physical property, after benefiting from and finishing, in nature Condition such as ultraviolet irradiation is lower to there is such as photooxidation decomposition and thermal oxide decomposition, degrades without causing unfavorable shadow to environment rapidly Ring.
The particle of the biodegradable additive obtained by above-described embodiment 1~3 can directly in the ratio of 1~3 mass % It is added in vinyon, assigns conventional plastic products with biodegradability.
Vinyon is not limited only to, this technology is suitable also for production environmental-friendpacking packing material, disposable plastic system The film class plastic products such as product, agricultural disposable film (particularly membrane product).There is oxygen under natural environment in these products Change reaction, cause hydroxy-acid group to increase, non-biodegradable plastic products is obtained biodegradability.These environmentally friendly class modelings Material products are finally degraded to carbon dioxide, water and humus.
The preparation of Biodegradable polyethylene film
By the biodegradable additive 1,2 and 3 of the gained of embodiment 1~3 with 2 mass %, the mass % of low density polyethylene (LDPE) 88, After the mass % materials of LLDPE 10 are sufficiently mixed, (draw ratio of extruder is usually to add single screw extrusion machine 20~30), it is 25 micron films to blow out thickness.By generate three kinds of polyethylene films be respectively designated as polyethylene film A, B and C。
Biodegradability is tested
Using the uviol lamp for launching 340 nanometers as ultraviolet source, intensity is 0.78 ± 0.02W/m2Mm is to passing through Sealed polyethylene plastic A, B and C that above-mentioned steps are obtained carry out ultraviolet treatment with irradiation.In addition, being moulded to polyethylene at 70 DEG C Material film A, B and C carry out thermal oxidation.Experimental result as shown in table 4, has mixed the polyethylene film of environment-friendly novel material in light Or in the presence of heat, elongation is substantially reduced, light thermal degradation is there occurs.
Table 4：Polyethylene film A, B and C carry out the change of the longitudinal tensile strain rate after ultraviolet pre-irradiation
Packaging material for food feasibility is tested
For polyethylene film A, B and C for being obtained by above-mentioned steps, according to food and drug control regulation FDA21CFR177.1520 (d) (3) (ii) carries out extract content measuring and enters by FDA21CFR177.1520 (d) (4) (ii) Row solubles content is tested.The medium that the experiment of extract content is used is n-hexane, and extraction time is 2 hours, and temperature is 50 DEG C, Regulation maximum extraction thing permissible value is 5.5 mass %.Solubles content test is dimethylbenzene using medium, and test temperature is 25 DEG C, it is stipulated that maximum solubles content permissible value is 11.3 mass %.Table 5 is the extract of polyethylene film A, B and C of the invention With the test value of DDGS.
Table 5：The extract and solubles content of polyethylene film A, B and C
Polyethylene film A Polyethylene film B Polyethylene film C
Extract content (quality %) 2.5 2.9 2.8
Solubles content (quality %) <0.5 <0.5 <0.5
As shown in Table 5, as a result show, biodegradable polyethylene film A, B and C meet country in of the invention three Regulation, can be used for packaging for foodstuff.
Presently preferred embodiments of the present invention is the foregoing is only, not for limiting practical range of the invention；If do not taken off From the spirit and scope of the present invention, the present invention is modified or equivalent, all should covered in the claims in the present invention In the middle of protection domain.

Claims (9)

1. a kind of biodegradable additive, it is characterised in that it is by low density polyethylene (LDPE), superfine iron powder, silane coupler and titanium Acid esters coupling agent is constituted, and the proportioning of each component is as follows：The mass % of superfine iron powder 5~10, the matter of silane coupler 0.01~0.20 Amount %, the mass % of metatitanic acid coupling agent 0.02~0.40, balance of low density polyethylene (LDPE).
2. biodegradable additive according to claim 1, it is characterised in that the superfine iron powder particle diameter be 5 microns with Under, consumption is 8 mass %.
3. biodegradable additive according to claim 1 and 2, it is characterised in that the silane coupler is vinyl Triethoxysilane.
4. biodegradable additive according to claim 1 and 2, it is characterised in that the metatitanic acid coupling agent is isopropyl Three (dioctylphyrophosphoric acid acyloxy) titanate esters.
5. a kind of method of the biodegradable additive prepared according to any one of Claims 1 to 4, comprises the steps of：
Step one：Each component is weighed in proportion, and table then is carried out to the superfine iron powder with silane coupler and metatitanic acid coupling agent Face is processed；
Step 2：The superfine iron powder and polyethylene of the gained in the step one are put into the stirring of high speed mixing equipment mixed Close, well mixed material is obtained；
Step 3：The material that will be obtained by the step 2 is added in dual-screw pelletizer and granulated.
6. method according to claim 5, it is characterised in that in the step 2, the high speed mixing equipment turns Speed is 500rpm, and temperature is 60 DEG C, and incorporation time is 10 minutes.
7. method according to claim 5, it is characterised in that in the step 3, the length of the dual-screw pelletizer Footpath ratio is 40, one area's temperature will be set into ratio secondly area's temperature is set as maximum temperature, i.e., 180 DEG C and keeps the temperature of setting Two area's temperature are low 10 DEG C, Jiang Sanqu, four area's temperature be set to it is identical with 2nd area, up to head is gradually dropped with gradient since 5th area Low, holding head temperature is steady temperature.
8. a kind of packaging material for food, it is characterised in that it includes the biological drop according to any one of Claims 1 to 4 Solution additive 1~3 mass %.
9. a kind of polyethylene film, it is characterised in that it includes the biodegradation according to any one of Claims 1 to 4 The mass % of additive 1~3.
CN201611109685.9A 2016-12-02 2016-12-02 A kind of biodegradable additive and the food packaging plastic products being prepared from using the additive Pending CN106750775A (en)

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WO2018099227A1 (en) * 2016-12-02 2018-06-07 苏州天兼新材料科技有限公司 Biological additive and plastic product for food packaging prepared by same
CN111138760A (en) * 2020-01-13 2020-05-12 刘辉 Environment-friendly ECO (ECO-friendly) biodegradable plastic-eating agent and preparation method thereof

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