CN107141603A - A kind of degradable environment-friendly material and preparation method thereof - Google Patents
A kind of degradable environment-friendly material and preparation method thereof Download PDFInfo
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- CN107141603A CN107141603A CN201710517527.5A CN201710517527A CN107141603A CN 107141603 A CN107141603 A CN 107141603A CN 201710517527 A CN201710517527 A CN 201710517527A CN 107141603 A CN107141603 A CN 107141603A
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- 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
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L97/00—Compositions of lignin-containing materials
- C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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- C08L2201/02—Flame or fire retardant/resistant
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- C08L2201/00—Properties
- C08L2201/06—Biodegradable
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- 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
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- 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
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- 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
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- 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
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
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Abstract
The invention discloses a kind of degradable environment-friendly material, include the raw material of following parts by weight：25~35 parts of straw, 12~17 parts of modified starch, 23~38 parts of polypropylene, 13~19 parts of poly- 3 butyric ester, 8~16 parts of filler, 1~3 part of silver ion antimicrobial agent, 2~3.2 parts of plasticizer, 1.5~2.1 parts of lubricant, 1~2 part of toughener, 0.2~0.6 part of fabric softening.Degradable environment-friendly material of the present invention is modified using modified starch and string to the polypropylene property entered, and degradable environment friendly material can not only be obtained by modification, but also keeps even improving the intensity and toughness of material；Its preparation method exempts from heating, boiling, natron, and manufacture craft is easy, fiber softening is fast, cost is low, green non-pollution.
Description
Technical field
The invention belongs to environment-friendly materials technical field, and in particular to a kind of degradable environment-friendly material and preparation method thereof.
Background technology
Polypropylene is the polymer being polymerized by monomer of propylene using N-Z catalyst etc..Polypropylene is used as general plastic
Material, because density is small, the good, intensity of rigidity is high, water absorption rate is low, chemical stability is high and nonpoisonous and tasteless and processing characteristics is superior
Advantage, is widely used to industrial production and the every field of daily life, for example its motor vehicle, household electrical appliances, commodity and
Fixture and packaging industry etc., which are obtained for, to be widely applied.Although polypropylene has preferable mechanical property, its shrinkage factor is big,
Product size stability is poor；And fragility is larger under low temperature, it is easily broken off.In addition, plain polypropylene modulus of elasticity is low, heat resistance
Difference, weatherability is poor, rigidity deficiency under high temperature, greatly limit polypropylene and is more widely applied.
For these defects, people have carried out various modifications to polypropylene.Mainly there are chemical modification and physical modification at present
Two methods.Chemical modification is mainly copolymerization, grafting and crosslinking etc., is to reach modified mesh by changing PP molecular structure
's.Physical modification is mainly blending, enhancing and filling etc. and adds additive to assign the performance that PP is new.But high polymer material is general
Store-through problem of aging also exist in PP resins.And with widely using for terminal consumer products, correspondingly also deposit
In substantial amounts of PP resins；Because the degraded of PP resins is slow, serious problem of environmental pollution is easily caused.
The content of the invention
The invention provides a kind of degradable environment-friendly material and preparation method thereof, asking in above-mentioned background technology is solved
Topic, degradable environment-friendly material of the present invention is modified using modified starch and string to the polypropylene property entered, and passes through modification
Degradable environment friendly material can not only be obtained, but also keeps even improving the intensity and toughness of material；Its preparation method
Exempt from heating, boiling, natron, manufacture craft is easy, fiber softening is fast, cost is low, green non-pollution.
In order to solve the problem of prior art is present, adopt the following technical scheme that：
A kind of degradable environment-friendly material, includes the raw material of following parts by weight：25~35 parts of straw, modified starch 12~17
Part, 23~38 parts of polypropylene, 13~19 parts of poly 3-hydroxy butyrate, 8~16 parts of filler, 1~3 part of silver ion antimicrobial agent, plasticising
2~3.2 parts of agent, 1.5~2.1 parts of lubricant, 1~2 part of toughener, 0.2~0.6 part of fabric softening.
It is preferred that, the degradable environment-friendly material includes the raw material of following parts by weight：30 parts of straw, modified starch
16 parts, 33 parts of polypropylene, 16 parts of poly 3-hydroxy butyrate, 12 parts of filler, 1.9 parts of silver ion antimicrobial agent, 2.7 parts of plasticizer, profit
1.9 parts of lubrication prescription, 1.3 parts of toughener, 0.4 part of fabric softening.
It is preferred that, the fabric softening includes the component of following parts by weight：2 parts of active silicic acid sodium, cationic starch 4
Part, 1.8 parts of cellulose, 0.7 part of alkali, 7 parts of textile auxiliary agent of mill, 84.5 parts of water.
It is preferred that, the modified starch is obtained by following methods：
By starch, silane coupler and concentration for 1~2wt% carboxymethyl chitosan sugar aqueous solution mix, temperature be 108~
45~60min is stirred under the conditions of 115 DEG C, modified starch is obtained, wherein the starch, silane coupler and carboxymethyl chitosan syrup
The mass ratio of solution is 10:0.8:1.
It is preferred that, the straw is the mixture of banana stem and sugarcane genotypes, and its weight ratio is 10:3.
It is preferred that, the filler is that diatomite, bentonite, talcum powder are 3 in mass ratio:2:The mixture of 1 mixing.
It is preferred that, the plasticizer is one or more mixing in polyethylene glycol, triacetyl glycerine, citrate
Thing, the toughener is POE.
A kind of method for preparing the degradable environment-friendly material, comprises the following steps：
（1）Straw, modified starch, polypropylene, poly 3-hydroxy butyrate, filler, silver-ion antibiotic are weighed by above-mentioned formula
Agent, plasticizer, lubricant, toughener, fabric softening, it is standby；
（2）Straw is dried, its water content is less than 8%, then it is whittled into drum chipper length for 20~
45cm segment, is then fed into devillicate machine and carries out sub-wire pressure cotton processing；
（3）Press the straw after cotton to extrude sub-wire with extruder, isolate fiber and stoste, fiber warrier is allocated
It is 22% to mass fraction, is mixed with fabric softening, is placed in highly concentrated stranding grinding machine mill fiber, obtains fiber pulp；
（4）By step（3）Obtained fiber pulp and modified starch, polypropylene, poly 3-hydroxy butyrate, filler, silver-ion antibiotic
Agent, plasticizer, lubricant, toughener are put into high-speed mixer, are stirred, and ultraviolet sterilization is handled 10~20 minutes, is obtained
Mixed material；
（5）By step（4）Obtained mixed material is put into extruding pelletization in double screw extruder, prilling temperature：180~200 DEG C,
Screw speed：360~380r/min, produces the degradable environment-friendly material.
It is preferred that, the ultraviolet range is 245~270nm.
Compared with prior art, it has the advantages that the present invention：
Degradable environment-friendly material of the present invention is modified using modified starch and string to the polypropylene property entered, and passes through modification
Degradable environment friendly material can not only be obtained, but also keeps even improving the intensity and toughness of material；Its preparation method
Exempt from heating, boiling, natron, manufacture craft is easy, fiber softening is fast, cost is low, green non-pollution, specific as follows：
（1）The present invention is by the use of modified starch, string, filler and polypropylene as raw material, modified starch and string
Degradation material, wide material sources are modified to polypropylene；Degradable composite material has not only been obtained, and can have been kept
The tensile strength and elongation at break of material are even improved, while the dimensional stability of material product can also be significantly improved；
（2）The present invention has carried out abundant, strict pretreatment and modification to string, makes its relative molecular mass increase not
Many, the property such as intensity, viscosity is subject to certain restrictions, so that string is uniformly distributed, and with modified starch, filler and
Polypropylene is fully merged, and material property includes enhancing（It is wet by force with it is dry strong）, it is fireproofing flame-resistant, heat resistanceheat resistant, electrical insulating property, guide temp, resistance to
Microorganism, acidproof, wear-resisting etc. be improved significantly；
（3）The present invention with it is nontoxic, harmless, non-corrosiveness fabric softening instead of does not have black liquor production in strong acid, highly basic, production
Raw, pulping process does not have total reduced sulfur generation, therefore has prevented the foul odour of traditional pulp-making method, and the waste water PH of discharge is about
5-7, can be recycled, with good environmental protection effect, while without thermophilic digestion system, chemical recovery system, pulp washing system, if
Standby investment is significantly less than conventional preparation techniques far below traditional pulp-making method, production cost.
Embodiment
With reference to specific embodiment, the present invention is expanded on further.These embodiments be merely to illustrate the present invention and without
In limitation the scope of the present invention.
Embodiment 1
The present embodiment is related to a kind of degradable environment-friendly material, includes the raw material of following parts by weight：25 parts of straw, modified starch
12 parts, 23 parts of polypropylene, 13 parts of poly 3-hydroxy butyrate, 8 parts of filler, 1 part of silver ion antimicrobial agent, 2 parts of plasticizer, lubricant
1.5 parts, 1 part of toughener, 0.2 part of fabric softening.
Wherein, the fabric softening includes the component of following parts by weight：2 parts of active silicic acid sodium, 4 parts of cationic starch,
1.8 parts of cellulose, 0.7 part of alkali, 7 parts of textile auxiliary agent of mill, 84.5 parts of water.
Wherein, the modified starch is obtained by following methods：
Starch, silane coupler and concentration are mixed for 1wt% carboxymethyl chitosan sugar aqueous solution, are 108 DEG C of conditions in temperature
Lower stirring 45min, obtains modified starch, wherein the mass ratio of the starch, silane coupler and carboxymethyl chitosan sugar aqueous solution
For 10:0.8:1.
Wherein, the straw is the mixture of banana stem and sugarcane genotypes, and its weight ratio is 10:3.
Wherein, the filler is that diatomite, bentonite, talcum powder are 3 in mass ratio:2:The mixture of 1 mixing.
Wherein, the plasticizer is polyethylene glycol, and the toughener is POE.
A kind of method for preparing the degradable environment-friendly material, comprises the following steps：
（1）Straw, modified starch, polypropylene, poly 3-hydroxy butyrate, filler, silver-ion antibiotic are weighed by above-mentioned formula
Agent, plasticizer, lubricant, toughener, fabric softening, it is standby；
（2）Straw is dried, its water content is less than 8%, then it is whittled into drum chipper length for 20~
45cm segment, is then fed into devillicate machine and carries out sub-wire pressure cotton processing；
（3）Press the straw after cotton to extrude sub-wire with extruder, isolate fiber and stoste, fiber warrier is allocated
It is 22% to mass fraction, is mixed with fabric softening, is placed in highly concentrated stranding grinding machine mill fiber, obtains fiber pulp；
（4）By step（3）Obtained fiber pulp and modified starch, polypropylene, poly 3-hydroxy butyrate, filler, silver-ion antibiotic
Agent, plasticizer, lubricant, toughener are put into high-speed mixer, are stirred, and ultraviolet sterilization is handled 10~20 minutes, is obtained
Mixed material；
（5）By step（4）Obtained mixed material is put into extruding pelletization in double screw extruder, prilling temperature：180 DEG C, screw rod
Rotating speed：360r/min, produces the degradable environment-friendly material.
Wherein, the ultraviolet wavelength is 245nm.
Embodiment 2
The present embodiment is related to a kind of degradable environment-friendly material, includes the raw material of following parts by weight：35 parts of straw, modified starch
17 parts, 38 parts of polypropylene, 19 parts of poly 3-hydroxy butyrate, 16 parts of filler, 3 parts of silver ion antimicrobial agent, 3.2 parts of plasticizer, lubrication
2.1 parts of agent, 2 parts of toughener, 0.6 part of fabric softening.
Wherein, the fabric softening includes the component of following parts by weight：2 parts of active silicic acid sodium, 4 parts of cationic starch,
1.8 parts of cellulose, 0.7 part of alkali, 7 parts of textile auxiliary agent of mill, 84.5 parts of water.
Wherein, the modified starch is obtained by following methods：
Starch, silane coupler and concentration are mixed for 2wt% carboxymethyl chitosan sugar aqueous solution, are 115 DEG C of conditions in temperature
Lower stirring 60min, obtains modified starch, wherein the mass ratio of the starch, silane coupler and carboxymethyl chitosan sugar aqueous solution
For 10:0.8:1.
Wherein, the straw is the mixture of banana stem and sugarcane genotypes, and its weight ratio is 10:3.
Wherein, the filler is that diatomite, bentonite, talcum powder are 3 in mass ratio:2:The mixture of 1 mixing.
Wherein, the plasticizer is triacetyl glycerine, and the toughener is POE.
A kind of method for preparing the degradable environment-friendly material, comprises the following steps：
（1）Straw, modified starch, polypropylene, poly 3-hydroxy butyrate, filler, silver-ion antibiotic are weighed by above-mentioned formula
Agent, plasticizer, lubricant, toughener, fabric softening, it is standby；
（2）Straw is dried, its water content is less than 8%, then it is whittled into drum chipper length for 20~
45cm segment, is then fed into devillicate machine and carries out sub-wire pressure cotton processing；
（3）Press the straw after cotton to extrude sub-wire with extruder, isolate fiber and stoste, fiber warrier is allocated
It is 22% to mass fraction, is mixed with fabric softening, is placed in highly concentrated stranding grinding machine mill fiber, obtains fiber pulp；
（4）By step（3）Obtained fiber pulp and modified starch, polypropylene, poly 3-hydroxy butyrate, filler, silver-ion antibiotic
Agent, plasticizer, lubricant, toughener are put into high-speed mixer, are stirred, and ultraviolet sterilization is handled 20 minutes, must be mixed
Material；
（5）By step（4）Obtained mixed material is put into extruding pelletization in double screw extruder, prilling temperature：200 DEG C, screw rod
Rotating speed：380r/min, produces the degradable environment-friendly material.
Wherein, the ultraviolet range is 270nm.
Embodiment 3
The present embodiment is related to a kind of degradable environment-friendly material, includes the raw material of following parts by weight：30 parts of straw, modified starch
16 parts, 33 parts of polypropylene, 16 parts of poly 3-hydroxy butyrate, 12 parts of filler, 1.9 parts of silver ion antimicrobial agent, 2.7 parts of plasticizer, profit
1.9 parts of lubrication prescription, 1.3 parts of toughener, 0.4 part of fabric softening.
Wherein, the fabric softening includes the component of following parts by weight：2 parts of active silicic acid sodium, 4 parts of cationic starch,
1.8 parts of cellulose, 0.7 part of alkali, 7 parts of textile auxiliary agent of mill, 84.5 parts of water.
Wherein, the modified starch is obtained by following methods：
Starch, silane coupler and concentration are mixed for 1.5wt% carboxymethyl chitosan sugar aqueous solution, are 110 DEG C of bars in temperature
52min is stirred under part, modified starch is obtained, wherein the quality of the starch, silane coupler and carboxymethyl chitosan sugar aqueous solution
Than for 10:0.8:1.
Wherein, the straw is the mixture of banana stem and sugarcane genotypes, and its weight ratio is 10:3.
Wherein, the filler is that diatomite, bentonite, talcum powder are 3 in mass ratio:2:The mixture of 1 mixing.
Wherein, the plasticizer is polyethylene glycol, triacetyl glycerine, the mixture of citrate, and the toughener is
POE。
A kind of method for preparing the degradable environment-friendly material, comprises the following steps：
（1）Straw, modified starch, polypropylene, poly 3-hydroxy butyrate, filler, silver-ion antibiotic are weighed by above-mentioned formula
Agent, plasticizer, lubricant, toughener, fabric softening, it is standby；
（2）Straw is dried, its water content is less than 8%, then it is whittled into drum chipper length for 20~
45cm segment, is then fed into devillicate machine and carries out sub-wire pressure cotton processing；
（3）Press the straw after cotton to extrude sub-wire with extruder, isolate fiber and stoste, fiber warrier is allocated
It is 22% to mass fraction, is mixed with fabric softening, is placed in highly concentrated stranding grinding machine mill fiber, obtains fiber pulp；
（4）By step（3）Obtained fiber pulp and modified starch, polypropylene, poly 3-hydroxy butyrate, filler, silver-ion antibiotic
Agent, plasticizer, lubricant, toughener are put into high-speed mixer, are stirred, and ultraviolet sterilization is handled 10~20 minutes, is obtained
Mixed material；
（5）By step（4）Obtained mixed material is put into extruding pelletization in double screw extruder, prilling temperature：190 DEG C, screw rod
Rotating speed：370r/min, produces the degradable environment-friendly material.
Wherein, the ultraviolet range is 253.7nm.
The specific embodiment of the present invention is described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring the substantive content of the present invention.
Claims (9)
1. a kind of degradable environment-friendly material, it is characterised in that include the raw material of following parts by weight：25~35 parts of straw, change
12~17 parts of starch of property, 23~38 parts of polypropylene, 13~19 parts of poly 3-hydroxy butyrate, 8~16 parts of filler, silver ion antimicrobial agent
1~3 part, 2~3.2 parts of plasticizer, 1.5~2.1 parts of lubricant, 1~2 part of toughener, 0.2~0.6 part of fabric softening.
2. degradable environment-friendly material according to claim 1, it is characterised in that include the raw material of following parts by weight：Plant
30 parts of stalk, 16 parts of modified starch, 33 parts of polypropylene, 16 parts of poly 3-hydroxy butyrate, 12 parts of filler, silver ion antimicrobial agent 1.9
Part, 2.7 parts of plasticizer, 1.9 parts of lubricant, 1.3 parts of toughener, 0.4 part of fabric softening.
3. degradable environment-friendly material according to claim 1, it is characterised in that the fabric softening includes following weight
The component of part：2 parts of active silicic acid sodium, 4 parts of cationic starch, 1.8 parts of cellulose, 0.7 part of alkali, 7 parts of textile auxiliary agent of mill, water 84.5
Part.
4. degradable environment-friendly material according to claim 1, it is characterised in that the modified starch is obtained by following methods
：
By starch, silane coupler and concentration for 1~2wt% carboxymethyl chitosan sugar aqueous solution mix, temperature be 108~
45~60min is stirred under the conditions of 115 DEG C, modified starch is obtained, wherein the starch, silane coupler and carboxymethyl chitosan syrup
The mass ratio of solution is 10:0.8:1.
5. degradable environment-friendly material according to claim 1, it is characterised in that the straw be banana stem with it is sweet
The mixture of sugarcane stalk, its weight ratio is 10:3.
6. degradable environment-friendly material according to claim 1, it is characterised in that the filler is diatomite, bentonite, cunning
Stone flour is 3 in mass ratio:2:The mixture of 1 mixing.
7. degradable environment-friendly material according to claim 1, it is characterised in that the plasticizer is polyethylene glycol, three vinegar
One or more mixtures in acid glyceride, citrate, the toughener is POE.
8. a kind of method for preparing any one of claim 1~7 degradable environment-friendly material, it is characterised in that the preparation
Method comprises the following steps：
（1）Straw, modified starch, polypropylene, poly 3-hydroxy butyrate, filler, silver-ion antibiotic are weighed by above-mentioned formula
Agent, plasticizer, lubricant, toughener, fabric softening, it is standby；
（2）Straw is dried, its water content is less than 8%, then it is whittled into drum chipper length for 20~
45cm segment, is then fed into devillicate machine and carries out sub-wire pressure cotton processing；
（3）Press the straw after cotton to extrude sub-wire with extruder, isolate fiber and stoste, fiber warrier is allocated
It is 22% to mass fraction, is mixed with fabric softening, is placed in highly concentrated stranding grinding machine mill fiber, obtains fiber pulp；
（4）By step（3）Obtained fiber pulp and modified starch, polypropylene, poly 3-hydroxy butyrate, filler, silver-ion antibiotic
Agent, plasticizer, lubricant, toughener are put into high-speed mixer, are stirred, and ultraviolet sterilization is handled 10~20 minutes, is obtained
Mixed material；
（5）By step（4）Obtained mixed material is put into extruding pelletization in double screw extruder, prilling temperature：180~200 DEG C,
Screw speed：360~380r/min, produces the degradable environment-friendly material.
9. preparation method according to claim 8, it is characterised in that the ultraviolet range is 245~270nm.
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| CN107760049A (en) * | 2017-10-24 | 2018-03-06 | 安徽悦尔伟塑料机械有限公司 | Degradable plastic filler and preparation method thereof |
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| CN107973981A (en) * | 2017-11-27 | 2018-05-01 | 郑州源冉生物技术有限公司 | A kind of degradable environmentally-friendly plastic and preparation method thereof |
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| CN113150435A (en) * | 2021-03-31 | 2021-07-23 | 东燊新材料科技(深圳)有限公司 | High-temperature-resistant degradable plastic material and preparation method thereof |
| CN113429759A (en) * | 2021-07-13 | 2021-09-24 | 山东瑞丰高分子材料股份有限公司 | PBAT composite modified biodegradable material and preparation method thereof |
| CN113667319A (en) * | 2021-09-14 | 2021-11-19 | 浙江晟祺实业有限公司 | Biodegradable material and preparation method thereof |
| CN114351360A (en) * | 2021-12-30 | 2022-04-15 | 广东宝创环保新材料制品有限公司 | Nano-copper non-woven fabric and processing method thereof |
| CN114196222A (en) * | 2022-01-07 | 2022-03-18 | 云南猫哆哩集团食品有限责任公司 | Biodegradable material prepared from tamarind fruit shell and fiber, and preparation and application thereof |
| WO2024042538A1 (en) * | 2022-08-20 | 2024-02-29 | Mody Jinali | Plant based vegan leather made from banana crop-waste |
| CN115477809A (en) * | 2022-08-31 | 2022-12-16 | 青岛巨星机械模具有限公司 | Degradable plastic with flame retardance and preparation method thereof |
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