CN110229486A - A kind of coffee grounds polylactic acid and preparation method thereof - Google Patents
A kind of coffee grounds polylactic acid and preparation method thereof Download PDFInfo
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- CN110229486A CN110229486A CN201910612636.4A CN201910612636A CN110229486A CN 110229486 A CN110229486 A CN 110229486A CN 201910612636 A CN201910612636 A CN 201910612636A CN 110229486 A CN110229486 A CN 110229486A
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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
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
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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
- C08L2205/06—Polymer mixtures characterised by other features having improved processability or containing aids for moulding methods
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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
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
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Abstract
The invention discloses a kind of coffee grounds polylactic acid, belong to poly-lactic acid material technical field.Coffee grounds polylactic acid includes the ingredient of following mass percent: polylactic acid 75-90%, coffee grounds 5-15%, toughener 3-7%, lubricant 0.5-1%, compatilizer 1-5%.The partial size of coffee grounds is 1500-3000 mesh.The preparation method of coffee grounds polylactic acid is the following steps are included: coffee grounds cleans；Coffee Slag treatment, using sodium hydroxide solution and alcohol solution dipping coffee grounds；Polylactic acid is dry；Stock；Mixing；Molding.The present invention using the product of above-mentioned coffee grounds polylactic acid and preparation method thereof production have the advantages that intensity height, good toughness, it is safe and non-toxic, can be degradable.55MPa is greater than using the product tensile strength of above-mentioned coffee grounds polylactic acid and preparation method thereof production, impact strength is not less than 35KJ/m2, shore hardness is 75 or more.
Description
Technical field
The invention belongs to poly-lactic acid material technical field more particularly to a kind of contain the polylactic acid of coffee grounds and its preparation side
Method.
Background technique
Polylactic acid is the polymer obtained with lactic acid for main polymerizable raw material, is a kind of novel biodegradation material, by
The starch raw material that renewable plant resources (such as corn) are proposed obtains glucose via saccharification, then by glucose and certain bacterium
The lactic acid of high-purity is made in kind fermentation, then passes through the polylactic acid that chemical synthesis process synthesizes certain molecular weight.Polylactic acid has good
Good biodegradability, can be degradable by microorganism in nature after use, ultimately generates carbon dioxide and water, does not pollute
Environment, this is highly beneficial to protection environment, is generally acknowledged environment-friendly material.Polylactic acid is suitable for that blow molding, thermoplastic etc. are various to be added
Work method, easy to process, application is very extensive.Polylactic acid is from industry to civilian various plastic products, packaged food, fast-food meal
Box, non-woven fabrics, industry and civilian cloth, and then it is processed into geotextile, health care fabric, rag, amenities, outdoor antiultraviolet
Fabric, tent cloth, ground cushion face etc. are all widely used, and market prospects are very good.But the elasticity of polylactic acid is poor.
Coffee is one of big drink in the world three, and with the change of people's living habit, the dosage of coffee is in average annual growth
Trend.For the coffee of every 1 kilogram of production by 0.9 kilogram of generation of coffee grounds, coffee grounds Yield comparison is big.It is common to handle coffee grounds
Method is exactly burning and landfill, causes the waste of resource and the energy.The waste utilization of coffee grounds becomes present upsurge, still
The secondary use of coffee grounds is rested on as the low orders application such as absorbing and deodorizing agent, plant waste more, and these utilizations compare
It is low.Coffee grounds intensity with higher, wearability and heat resistance, and coffee grounds has the natural fragrance of coffee, it is safe and non-toxic,
Wholly-degradable.Coffee grounds is added in polylactic acid to the ingredient that can not only reduce polylactic acid, but also its intensity can be improved.
But the compatibility of coffee grounds and polylactic acid is poor, the addition of coffee grounds also results in the toughness decline of polylactic acid.
Summary of the invention
The object of the present invention is to provide a kind of coffee grounds polylactic acid, solve coffee grounds and polylactic acid poor compatibility, poor toughness
The problem of.The present invention also provides a kind of preparation methods of coffee grounds polylactic acid.
To achieve the above object, the present invention provides a kind of coffee grounds polylactic acid, the ingredient including following mass percent:
Polylactic acid 75-90%, coffee grounds 5-15%, toughener 3-7%, lubricant 0.5-1%, compatilizer 1-5%.
Preferably, the ingredient including following mass percent: polylactic acid 75-90%, coffee grounds 6-13%, toughener 3.5-
6.8%, lubricant 0.55-0.95%, compatilizer 2-4.8%.
Preferably, the melt flow rate of the polylactic acid is 3-10g/min.
Preferably, the partial size of the coffee grounds is 1500-3000 mesh.
Preferably, the toughener is methyl diphenylene diisocyanate.
Preferably, the lubricant is aluminate coupling agent, and the compatilizer is silane conjugates.
A kind of preparation method of above-mentioned coffee grounds polylactic acid, comprising the following steps:
S1, coffee grounds prepare, and coffee grounds are placed in dismembyator are ground up, sieved first, and obtaining partial size is 1500-
The coffee grounds of 3000 mesh；Ground coffee grounds is cleaned in water, removes the ash content and impurity on coffee grounds surface, and will
Coffee grounds after washing, which is placed in drying box, is dried, and the coffee grounds water content after drying is 35-40%；
S2, coffee grounds pretreatment, will be molten by the sodium hydroxide of step S1 treated coffee grounds is immersed in 5-10mol/L
In liquid, impregnate 20-30 minutes；Then coffee grounds is put into the ethanol solution of 5-10mol/L, is impregnated 10-20 minutes；Filtering,
It is washed with water to neutrality, is dried；
S3, material prepare, and polylactic acid is placed in drying box and is dried, and drying temperature is 60-80 DEG C, drying time
It is 8-16 hours；
S4, stock weigh each raw material according to composition proportion, spare；
S5, mixing, by the polylactic acid by step S3 processing, the coffee grounds by step S2 processing, toughener, lubricant
It is put into kneading machine and is mixed with compatilizer, obtain mixture；
Obtained mixture is carried out extrusion forming or compression molding by S6, molding.
Preferably, in the step S2, coffee grounds is dried at 150-200 DEG C, and coffee grounds water content is less than 2%.
Preferably, in the step S5, melting temperature is 180-200 DEG C, and mixing time is 5-10 minutes.
The advantages of the invention and good effect are:
(1) coffee grounds has intensity height, hardness height, excellent adsorption, degradable, safe and non-toxic feature, by coffee grounds plus
The intensity for entering to can be improved polylactic acid in polylactic acid reduces its material cost, and poly-lactic acid products can be made to have coffee
Natural fragrance.
(2) toughness of polylactic acid can be improved as toughener using methyl diphenylene diisocyanate, also improves poly- cream
Bond strength between acid and coffee grounds.
(3) coffee grounds is handled using sodium hydroxide and ethanol solution, cellulose, hemicellulose in rejecting coffee grounds
Element, lignin and esters make to improve the bond strength between coffee grounds and polylactic acid full of hole abundant inside coffee grounds.
Below by embodiment, technical scheme of the present invention will be described in further detail.
Specific embodiment
Below with reference to embodiment, the invention will be further described, it should be noted that the present embodiment is with this technology
Premised on scheme, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to this
Embodiment.
Embodiment 1
A kind of coffee grounds polylactic acid, the ingredient including following mass percent: polylactic acid 81%, coffee grounds 13%, toughening
Agent 3.5%, lubricant 0.55%, compatilizer 2%.
The melt flow rate of polylactic acid is 3g/min.
The partial size of coffee grounds is 1500 mesh, and the coffee grounds of small particle is easier disperse in polylactic acid matrix.
Toughener is methyl diphenylene diisocyanate (MDI).The isocyanate group of MDI and the terminal hydroxy group of polylactic acid molecule chain
Carrying out reaction with carboxyl end group has chain extension effect.MDI is reacted with the hydroxyl on coffee grounds surface generates bridge joint effect, enables polylactic acid
Coffee grounds is enough wrapped up, the interface binding power between coffee grounds and polylactic acid is improved.
Lubricant is aluminate coupling agent, and compatilizer is silane conjugates.Aluminic acid coupling agent quality is stablized, in process
In have preferable lubricating action.Aluminic acid coupling agent parent can occur with polylactic acid and coffee grounds anti-respectively without generator terminal and organic-philic end
It answers, forms tangled structure, enhance the interface compatibility of coffee grounds and polylactic acid.Silane conjugates can increase the strong of polylactic acid
Degree.
The preparation method of above-mentioned coffee grounds polylactic acid, comprising the following steps:
S1, coffee grounds prepare, and coffee grounds are placed in dismembyator are ground up, sieved first, and obtaining partial size is 1500 mesh
Coffee grounds.Ground coffee grounds is cleaned in water, removes the ash content and impurity on coffee grounds surface, and will be after washing
Coffee grounds be placed in drying box and dried, the coffee grounds water content after drying is 40%.
S2, coffee grounds pretreatment, will be by the sodium hydroxide solution of step S1 treated coffee grounds is immersed in 5mol/L
In, it impregnates 30 minutes；Then coffee grounds is put into the ethanol solution of 5mol/L, is impregnated 20 minutes；Filtering, is washed with water to
Property, drying.Coffee grounds is dried in 150-200 DEG C of drying box, and coffee grounds water content avoids interiors of products less than 2%
Generate hole, surface forms water wave, raising product quality.Containing cellulose, hemicellulose, lignin and other are small in coffee grounds
Molecule Ester, coffee grounds is immersed in sodium hydroxide solution and ethanol solution can be by the unstable fiber in this part and readily soluble
Ester stripped, make coffee grounds surface and it is internal form gap, be conducive to the combination between coffee grounds and polylactic acid.
S3, material prepare, and polylactic acid is placed in drying box and is dried, and drying temperature is 60 DEG C, drying time 8
Hour, remove the moisture on polylactic acid surface.
S4, stock weigh each raw material according to composition proportion, spare.
S5, mixing, by the polylactic acid by step S3 processing, the coffee grounds by step S2 processing, toughener, lubricant
It is put into kneading machine and is mixed with compatilizer, obtain mixture.Melting temperature is 180 DEG C, and mixing time is 5 minutes, revolving speed
For 50r/min.
Obtained mixture is carried out extrusion forming or compression molding by S6, molding.Need before shaping to mixture into
Row drying reduces the moisture in mixture.
The product tensile strength 58.6MPa produced using above-mentioned coffee grounds polylactic acid and preparation method thereof, impact strength
35.4KJ/m2, shore hardness 88.
Embodiment 2
A kind of coffee grounds polylactic acid, the ingredient including following mass percent: polylactic acid 81%, coffee grounds 8%, toughener
5.2%, lubricant 0.75%, compatilizer 4.3%.
The melt flow rate of polylactic acid is 8g/min.
The partial size of coffee grounds is 3000 mesh, and the coffee grounds of small particle is easier disperse in polylactic acid matrix.
Toughener is methyl diphenylene diisocyanate (MDI).The isocyanate group of MDI and the terminal hydroxy group of polylactic acid molecule chain
Carrying out reaction with carboxyl end group has chain extension effect.MDI is reacted with the hydroxyl on coffee grounds surface generates bridge joint effect, enables polylactic acid
Coffee grounds is enough wrapped up, the interface binding power between coffee grounds and polylactic acid is improved.
Lubricant is aluminate coupling agent, and compatilizer is silane conjugates.Aluminic acid coupling agent quality is stablized, in process
In have preferable lubricating action.Aluminic acid coupling agent parent can occur with polylactic acid and coffee grounds anti-respectively without generator terminal and organic-philic end
It answers, forms tangled structure, enhance the interface compatibility of coffee grounds and polylactic acid.Silane conjugates can increase the strong of polylactic acid
Degree.
The preparation method of above-mentioned coffee grounds polylactic acid, comprising the following steps:
S1, coffee grounds prepare, and coffee grounds are placed in dismembyator are ground up, sieved first, and obtaining partial size is 3000 mesh
Coffee grounds.Ground coffee grounds is cleaned in water, removes the ash content and impurity on coffee grounds surface, and will be after washing
Coffee grounds be placed in drying box and dried, the coffee grounds water content after drying is 35%.
S2, coffee grounds pretreatment, will be by the sodium hydroxide solution of step S1 treated coffee grounds is immersed in 10mol/L
In, it impregnates 30 minutes；Then coffee grounds is put into the ethanol solution of 10mol/L, is impregnated 20 minutes；Filtering, is washed with water to
Neutrality, drying.Coffee grounds is dried in 150-200 DEG C of drying box, and coffee grounds water content avoids in product less than 2%
Portion generates hole, surface forms water wave, improves product quality.In coffee grounds containing cellulose, hemicellulose, lignin and other
Small molecular ester substance, by coffee grounds be immersed in sodium hydroxide solution and ethanol solution can by the unstable fiber in this part and easily
Molten Ester is stripped, and is made coffee grounds surface and internal formation gap, is conducive to the knot between coffee grounds and polylactic acid
It closes.
S3, material prepare, and polylactic acid is placed in drying box and is dried, and drying temperature is 80 DEG C, and drying time is
10 hours, remove the moisture on polylactic acid surface.
S4, stock weigh each raw material according to composition proportion, spare.
S5, mixing, by the polylactic acid by step S3 processing, the coffee grounds by step S2 processing, toughener, lubricant
It is put into kneading machine and is mixed with compatilizer, obtain mixture.Melting temperature is 190 DEG C, and mixing time is 8 minutes, revolving speed
For 60r/min.
Obtained mixture is carried out extrusion forming or compression molding by S6, molding.Need before shaping to mixture into
Row drying reduces the moisture in mixture.
The product tensile strength 59.2MPa produced using above-mentioned coffee grounds polylactic acid and preparation method thereof, impact strength
45.2KJ/m2, shore hardness 82.
Embodiment 3
A kind of coffee grounds polylactic acid, the ingredient including following mass percent: polylactic acid 81%, coffee grounds 6%, toughener
6.8%, lubricant 0.95%, compatilizer 4.5%.
The melt flow rate of polylactic acid is 3g/min.
The partial size of coffee grounds is 2000 mesh, and the coffee grounds of small particle is easier disperse in polylactic acid matrix.
Toughener is methyl diphenylene diisocyanate (MDI).The isocyanate group of MDI and the terminal hydroxy group of polylactic acid molecule chain
Carrying out reaction with carboxyl end group has chain extension effect.MDI is reacted with the hydroxyl on coffee grounds surface generates bridge joint effect, enables polylactic acid
Coffee grounds is enough wrapped up, the interface binding power between coffee grounds and polylactic acid is improved.
Lubricant is aluminate coupling agent, and compatilizer is silane conjugates.Aluminic acid coupling agent quality is stablized, in process
In have preferable lubricating action.Aluminic acid coupling agent parent can occur with polylactic acid and coffee grounds anti-respectively without generator terminal and organic-philic end
It answers, forms tangled structure, enhance the interface compatibility of coffee grounds and polylactic acid.Silane conjugates can increase the strong of polylactic acid
Degree.
The preparation method of above-mentioned coffee grounds polylactic acid, comprising the following steps:
S1, coffee grounds prepare, and coffee grounds are placed in dismembyator are ground up, sieved first, and obtaining partial size is 2000 mesh
Coffee grounds.Ground coffee grounds is cleaned in water, removes the ash content and impurity on coffee grounds surface, and will be after washing
Coffee grounds be placed in drying box and dried, the coffee grounds water content after drying is 40%.
S2, coffee grounds pretreatment, will be by the sodium hydroxide solution of step S1 treated coffee grounds is immersed in 10mol/L
In, it impregnates 20 minutes；Then coffee grounds is put into the ethanol solution of 5mol/L, is impregnated 10 minutes；Filtering, is washed with water to
Property, drying.Coffee grounds is dried in 150-200 DEG C of drying box, and coffee grounds water content avoids interiors of products less than 2%
Generate hole, surface forms water wave, raising product quality.Containing cellulose, hemicellulose, lignin and other are small in coffee grounds
Molecule Ester, coffee grounds is immersed in sodium hydroxide solution and ethanol solution can be by the unstable fiber in this part and readily soluble
Ester stripped, make coffee grounds surface and it is internal form gap, be conducive to the combination between coffee grounds and polylactic acid.
S3, material prepare, and polylactic acid is placed in drying box and is dried, and drying temperature is 60 DEG C, drying time 8
Hour, remove the moisture on polylactic acid surface.
S4, stock weigh each raw material according to composition proportion, spare.
S5, mixing, by the polylactic acid by step S3 processing, the coffee grounds by step S2 processing, toughener, lubricant
It is put into kneading machine and is mixed with compatilizer, obtain mixture.Melting temperature is 180 DEG C, and mixing time is 10 minutes, revolving speed
For 50r/min.
Obtained mixture is carried out extrusion forming or compression molding by S6, molding.Need before shaping to mixture into
Row drying reduces the moisture in mixture.
The product tensile strength 55.4MPa produced using above-mentioned coffee grounds polylactic acid and preparation method thereof, impact strength
43.6KJ/m2, shore hardness 78.
The present invention has intensity height, good toughness, peace using the product of above-mentioned coffee grounds polylactic acid and preparation method thereof production
Atoxic, advantage that can be degradable.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention rather than is limited,
Although the present invention is described in detail with reference to preferred embodiments, those skilled in the art should understand that: its according to
So can be with modification or equivalent replacement of the technical solution of the present invention are made, and these modifications or equivalent replacement cannot also make to repair
Technical solution after changing is detached from the spirit and scope of technical solution of the present invention.
Claims (9)
1. a kind of coffee grounds polylactic acid, which is characterized in that the ingredient including following mass percent: polylactic acid 75-90%, coffee
Slag 5-15%, toughener 3-7%, lubricant 0.5-1%, compatilizer 1-5%.
2. a kind of coffee grounds polylactic acid according to claim 1, which is characterized in that including following mass percent at
Point: polylactic acid 75-90%, coffee grounds 6-13%, toughener 3.5-6.8%, lubricant 0.55-0.95%, compatilizer 2-
4.8%.
3. a kind of coffee grounds polylactic acid according to claim 1, it is characterised in that: the melt flow rate of the polylactic acid
For 3-10g/min.
4. a kind of coffee grounds polylactic acid according to claim 1, it is characterised in that: the partial size of the coffee grounds is 1500-
3000 mesh.
5. a kind of coffee grounds polylactic acid according to claim 1, it is characterised in that: the toughener is diphenyl methane two
Isocyanates.
6. a kind of coffee grounds polylactic acid according to claim 1, it is characterised in that: the lubricant is Aluminate coupling
Agent, the compatilizer are silane conjugates.
7. a kind of preparation method of coffee grounds polylactic acid according to claim 1-6, which is characterized in that including with
Lower step:
S1, coffee grounds prepare, and coffee grounds are placed in dismembyator are ground up, sieved first, and obtaining partial size is 1500-3000 mesh
Coffee grounds；Ground coffee grounds is cleaned in water, removes the ash content and impurity on coffee grounds surface, and will be after washing
Coffee grounds be placed in drying box and dried, the coffee grounds water content after drying is 35-40%；
S2, coffee grounds pretreatment, will be by the sodium hydroxide solution of step S1 treated coffee grounds is immersed in 5-10mol/L
In, it impregnates 20-30 minutes；Then coffee grounds is put into the ethanol solution of 5-10mol/L, is impregnated 10-20 minutes；Filtering is used
Water washing is dried to neutrality；
S3, material prepare, and polylactic acid is placed in drying box and is dried, and drying temperature is 60-80 DEG C, drying time 8-
16 hours；
S4, stock weigh each raw material according to composition proportion, spare；
S5, mixing, by the polylactic acid handled by step S3, the coffee grounds, toughener, lubricant and the phase that are handled by step S2
Appearance agent, which is put into kneading machine, to be mixed, and mixture is obtained；
Obtained mixture is carried out extrusion forming or compression molding by S6, molding.
8. a kind of preparation method of coffee grounds polylactic acid according to claim 7, it is characterised in that: in the step S2,
Coffee grounds is dried at 150-200 DEG C, and coffee grounds water content is less than 2%.
9. a kind of preparation method of coffee grounds polylactic acid according to claim 7, it is characterised in that: in the step S5,
Melting temperature is 180-200 DEG C, and mixing time is 5-10 minutes.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110724372A (en) * | 2019-09-25 | 2020-01-24 | 遵义医科大学 | Biodegradable coffee residue rattan-like material |
| CN111534070A (en) * | 2020-06-06 | 2020-08-14 | 深圳市科思飞科技有限公司 | Ceramic powder polylactic acid and preparation method thereof |
| CN112500688A (en) * | 2020-11-30 | 2021-03-16 | 捷成实业（深圳）有限公司 | Biodegradable antibacterial toy material and preparation method thereof |
| CN112552647A (en) * | 2020-12-10 | 2021-03-26 | 上海宝谊图片有限公司 | Preparation method of coffee grounds and epoxy resin composite material |
| CN112724613A (en) * | 2020-12-10 | 2021-04-30 | 广东格瑞新材料股份有限公司 | Degradable material and preparation method thereof |
| CN113201172A (en) * | 2021-05-31 | 2021-08-03 | 咖法科技(上海)有限公司 | Coffee grounds degradable cold drink straw and preparation method thereof |
| CN113279086A (en) * | 2021-05-07 | 2021-08-20 | 东部湾(扬州)生物新材料有限公司 | Preparation method of polylactic acid composite ultrashort non-crimped fiber precursor |
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| CN106280324A (en) * | 2015-05-14 | 2017-01-04 | 特腾绿能科技股份有限公司 | Environment-friendly adhesive tape with natural plant fragrance for 3D printing and preparation method thereof |
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| CN110724372A (en) * | 2019-09-25 | 2020-01-24 | 遵义医科大学 | Biodegradable coffee residue rattan-like material |
| CN111534070A (en) * | 2020-06-06 | 2020-08-14 | 深圳市科思飞科技有限公司 | Ceramic powder polylactic acid and preparation method thereof |
| CN112500688A (en) * | 2020-11-30 | 2021-03-16 | 捷成实业（深圳）有限公司 | Biodegradable antibacterial toy material and preparation method thereof |
| CN112552647A (en) * | 2020-12-10 | 2021-03-26 | 上海宝谊图片有限公司 | Preparation method of coffee grounds and epoxy resin composite material |
| CN112724613A (en) * | 2020-12-10 | 2021-04-30 | 广东格瑞新材料股份有限公司 | Degradable material and preparation method thereof |
| CN113321907B (en) * | 2021-04-28 | 2022-08-09 | 张晓军 | Composite 3D printing material containing coffee grounds and preparation method and application thereof |
| CN113321907A (en) * | 2021-04-28 | 2021-08-31 | 张晓军 | Composite 3D printing material containing coffee grounds and preparation method and application thereof |
| CN113279086A (en) * | 2021-05-07 | 2021-08-20 | 东部湾(扬州)生物新材料有限公司 | Preparation method of polylactic acid composite ultrashort non-crimped fiber precursor |
| CN113201172A (en) * | 2021-05-31 | 2021-08-03 | 咖法科技(上海)有限公司 | Coffee grounds degradable cold drink straw and preparation method thereof |
| CN113717505A (en) * | 2021-09-15 | 2021-11-30 | 上海乐亿塑料制品有限公司 | Degradable plastic and preparation method thereof |
| KR102572348B1 (en) * | 2022-11-25 | 2023-08-30 | 주식회사 아포트레 | Eco-friendly plastic pellets using coffee waste and manufacturing method thereof |
| CN118272964A (en) * | 2024-04-23 | 2024-07-02 | 上海亚都塑料有限公司 | Environment-friendly composite woven cloth and preparation process thereof |
| CN118599332A (en) * | 2024-05-09 | 2024-09-06 | 东莞市国亨塑胶科技有限公司 | A sheet material containing coffee grounds and preparation method thereof |
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Application publication date: 20190913 |