CN1328082A - Fully biodegradable foamed composition and its shaping process - Google Patents
Fully biodegradable foamed composition and its shaping process Download PDFInfo
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- CN1328082A CN1328082A CN 00106182 CN00106182A CN1328082A CN 1328082 A CN1328082 A CN 1328082A CN 00106182 CN00106182 CN 00106182 CN 00106182 A CN00106182 A CN 00106182A CN 1328082 A CN1328082 A CN 1328082A
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Abstract
A biodegradable composition product is prepared from modified starch, plant fibre, adhesive, plasticizer, flowability increaser, nucleator and foamer through adding water to said raw materials, stirring, loading in mould, hot pressing, demoulding, spraying glue, and drying. Its advantages include high toughness and elasticity, high biodegradation speed, and easy demoulding.
Description
What the present invention relates to contain starch, lignin material can be by biodegradable composition and forming method thereof.
Because the quickening of rhythm of life makes the fast food development rapidly, the disposable tableware consumption increases sharply.At China's disposable tableware is based on the porous plastics tableware; its main component is that foamed poly styrene plastic has inexpensive with this foamed poly styrene plastic tableware; light weight; advantages such as convenience; but polystyrene foamed goods (EPS) non-degradable; more because its light weight volume is big; increased quantity of refuse; be difficult to recycling; it is one of reason that causes said " white pollution "; it also is the problem that environment protection can not be ignored; and in the production process of EPS, use freonll-11 (fluorine refrigerant) as whipping agent; and this fluorine refrigerant has destruction to the ozone in the atmospheric layer, causes the deterioration of global environment.In the use of EPS, the polymeric styrene monomer is not harmful fully, contacts for a long time and eat to cause teratogenesis and carcinogenic, and therefore many countries have banned use of nondegradable food plastic packing articles.China also the EPS product as obsolete product, forbade in 2000 producing and using.
The EPS substitute products emerge in an endless stream over nearly two, three years, but very different, roughly can be divided into four classes: the 1st class is the pulpboard class, and the 2nd class degradable plastics class, the 3rd, 4 classes are vegetable fibre class and edible powder class.Above-mentioned this four series products respectively has its relative merits.Pulpboard series products excellent property, but, cause the minimizing of forest-floor and the waste of natural resources owing to expend a large amount of timber, production cost is high, and the pollution that produces waste water in the paper-making process again; Degradative plastics can be divided into biological degradation photodegradation or light/biodegradation plastic, no matter but the degraded of which kind of form only can make the bulk plastic cracking become fritter, cause the deterioration of soil property, and still cause potential to pollute to soil; Advantages such as it is extensive that the vegetable fibre class has raw material sources, cheap, but the product of producing exists the pesticide residue of use properties instability and raw material and problem such as go mouldy; Edible powder class biggest advantage is both edible after fast food, fast food etc. holds, and the recyclable again animal feed of doing reaches no rubbish, free of contamination purpose basically, is the ideal substitute of foamed polystyrene tableware.
Chinese patent literature CN1137439A has introduced a kind of making method of mess-tin, its raw material by weight percentage, starch 75-80%, plant fiber powder 10-20%, xanthan gum 2-3%, whipping agent 0.5-1%, softening agent 0.5-1%; After the above-mentioned raw materials mixing and stirring, through hot-forming, cut, spray glue, drying forms product.Said starch is W-Gum, potato starch, sweet potato starch, whole meal flour, ground rice; Said plant fiber powder is a straw fiber, corn straw powder; Said xanthan gum can be gelatin, chitosan, sodium alginate; Said whipping agent is the food composite foamable agent; Said softening agent is glycerine, glycerine list acid anhydride ester, ethylene glycol.
Chinese patent literature CN1193636A has introduced a kind of biodegradable material, and it is to be mixed by ative starch, non-wood plant fibre and high boiling point softening agent; Ative starch accounts for the 10-80% of mixture total weight amount, and non-wood plant fibre accounts for the 10-75% of mixture total weight amount, and the high boiling point softening agent accounts for the 10-30% of mixture total weight amount.Said ative starch is that the said non-wood plant fibre of former powder of cereal, potato class and other plant mature fruits is bamboo class, grass, bast class, seed hairs; Said high boiling point softening agent is that the product after urine, amine, methyl alcohol modification is propylene glycol, polyethylene, Sorbitol Powder, phthalic acid, dibutylester.With above-mentioned material in proportion thorough mixing good after, hot-forming, every millimeter wall thickness 5-60 second during hot-press solidifying, 80-180 ℃ of mould temperature, pressure 17-35 MPa/centimetre.
All main raw materials are starch in the above-mentioned prior art, but because the molecular structure and the physico-chemical property of starch self have determined that the breaking tenacity of its finished product is higher, and poor ductility, more because the vegetable fibre that is added is a powdery, do not have the skeleton supporting role, do not reach toughening effect,, produce difficulty in actual applications so the product performance that adopt above-mentioned patented technology to make are more crisp.
Purpose of the present invention just is to work out a kind of cheap, nontoxic disposable use, can degrade, and is free from environmental pollution, and the foaming composition with good use properties.
Another object of the present invention is to utilize foaming composition of the present invention to be raw material, prepares the foaming composition moulding product of excellent property.
A kind of fully biodegradable foamed composition of the present invention, it contains treated starch 50-80% weight percentage, vegetable fibre 10-40% weight percentage, cementing agent 5-10% weight percentage, softening agent 1-5% weight percentage, incremental dose of 0.5-2% weight percentage, nucleator 0.5-2% weight percentage, whipping agent 1-10% weight percentage.
Said treated starch is a kind of starch that structure, physical property and the chemical property of ative starch is changed by physics, chemistry and biological method, thereby possesses some specific performance properties and purposes.Ative starch generally is W-Gum, potato starch, wheat starch and cereal starch.Said treated starch is to ruin wherein a kind of of structurizing starch, phosphate ester starch, Sumstar 190, denaturated starch by acid or two kinds or three kinds.Contain treated starch 50-80% weight percentage in the foaming composition.
Used vegetable fibre is the thick vegetable fibre part that extracts from wherein a kind of of bagasse, straw, bamboo, beet pulp, rice husk, Pericarppium arachidis hypogaeae or two kinds or three kinds of wastes.Contain vegetable fibre 10-40% weight percentage in the foaming composition.
Used cementing agent is the edible glue as foodstuff additive.They are wherein a kind of of gelatin, gelatine, sodium alginate, chitosan and xanthan gum or two kinds or three kinds.Contain cementing agent 5-10% weight percentage in the foaming composition.
Said softening agent comprises low-molecular-weight polymeric polyalcohols and low-molecular-weight organic softening agent.The lower molecular weight polyvalent alcohol is wherein a kind of of polyoxyethylene glycol, polyoxyethylene oxypropylene, polypropylene glycol; Low-molecular-weight organic softening agent is wherein a kind of of glycerine, propylene glycol, sorbyl alcohol, tetramethylolmethane.Plasticizer-containing 1-5% weight percentage in the foaming composition.
Adding incremental dose is for improving the flowability of treated starch.Used incremental dose is animal and plant fat, is good with hydrogenated fat again.Particularly those at room temperature are solid-state fat, the fat of fusing point about 50 ℃; Can also be ester, again with C
12-C
13The Witepsol W-S 55 of lipid acid is for better.Contain incremental dose of 0.5-2% weight percentage in the foaming composition.
Said nucleator is mineral filler, mainly plays the effect of the stable and uniform in foaming of keeping complex.Nucleator is aluminium, magnesium, silicon, titanyl compound, for example wherein a kind of of aluminum oxide (aluminium sesquioxide), magnesium oxide, silicon-dioxide, titanium dioxide or two kinds or three kinds, and containing nucleator in the foaming composition is the 0.5-2% weight percentage.
Said whipping agent is the material with pyrolytic, and they are wherein a kind of of sodium bicarbonate, bicarbonate of ammonia, water.Contain whipping agent 1-10% weight percentage in the foaming composition.
Its shaping process of a kind of fully biodegradable foamed combination of the present invention, press treated starch 50-80% weight percentage, vegetable fibre 10-40% weight percentage, cementing agent 5-10% weight percentage, softening agent 1-5% weight percentage, incremental dose of 0.5-2% weight percentage, nucleator 0.5-2% weight percentage, the prescription of whipping agent 1-10% weight percentage is got raw material ready, adds the water of composition material gross weight 20-50% in composition material, after the raw material stirring that will add entry mixes, annotate film, hot-forming, hot-forming temperature is 140-180 ℃, pressure is 0.13-0.15MPa, and demoulding forms product again.
When raw material stirring was mixed, the speed of its stirring mixed 10-15 minute for good with 120-200rpm.The temperature that raw material stirring mixes is 30-55 ℃.Preheated mold is injected in the raw material metering that mixes, and heating and pressurizing is carried out hot-forming.Typing after heating and pressurizing reaction exhaust foaming.Hot-forming pressure is 0.13-0.15MPa, and temperature 140-180 ℃, hot-forming time 90-150 second, foaming and setting can obtain the disposable biodegradable foam molded product after the demoulding, packing.
According to the shape difference of mould, can make plate, bowl, cup, lunch box and corresponding package buffer material.According to the purposes of moulding, select whether to spray waterproof oil resistant glued membrane again on its surface; If moulding product are used for wet type packing for example as the food and drink tool, then need after the demoulding at its surface spraying one deck waterproof oil resistant glued membrane, reaching the purpose of waterproof and oilproof, oven dry and get final finished.
Gauge pressure when the product after the demoulding go-on-go is sprayed glue is 0.02-0.07MPa (said gauge pressure is that normal atmosphere adds the pressure that gauge outfit is indicated), temperature is 30-45 ℃, behind the spray glue under 100-140 ℃ temperature baking 100-120 form the finished product packing and selling second.
Used waterproof and oilproof sol solution is an edibility natural glue solution during spray glue, can be that the glue of corn gum, chitin, seaweed gel, gelatin, gelatine a kind of 30-50% weight percentage that is mixed with wherein is standby.
The advantage of a kind of fully biodegradable foamed composition of the present invention and its shaping process just is:
1. fully biodegradable foamed composition of the present invention has adopted treated starch, said treated starch can be with native starch for example W-Gum, potato starch, wheat starch and cereal starch, place an encloses container, under high-temperature and high-pressure conditions, the starch granules fusing, molecular structure produces disordering.Can push or be molded as many useful shapes and profile through this heat treated starch, make the moulding product have certain toughness and elasticity, biodegradation rate is improved, not only fragility is big and there are not its moulding product of starch of modification, body is unreal, and, make the moulding product be difficult for the demoulding because the affinity of starch and metal is strong.And foaming composition of the present invention has overcome this shortcoming.The cutlery box biodegradation test made from fully biodegradable foamed composition of the present invention reaches 4 grades, meets standard GB-18006.1-1999.
2. composition material wide material sources of the present invention, cost is low, nontoxic, harmless, health, its moulding product good looking appearance practicality has good use properties, and heat-resisting water heat resistant oils reached more than half an hour, met relevant national standard fully.Can complete biodegradable with finishing, free from environmental pollution, be the ideal substitute of plastic packing product.Can be widely used in catering trade, food and drug packaging.Its performance sees Table 1.
The disposable fully biodegradable foamed composition of table 1 detects assay
| Interventions Requested | Assay | Standard-required | |||
| Embodiment 1 | Embodiment 2 | Embodiment 3 | |||
| Bear a heavy burden and test (3Kg, height change %) | 3 | 4 | 5 | ≤ 5 | |
| Residue on evaporation (mg/L) | Water, 60 ℃, 2h | 27 | 25 | 25 | ≤ 30 |
| Normal hexane, 20 ℃, 2h | 15 | 18 | 10 | ≤ 30 | |
| 4% acetate, 60 ℃, 2h | 25 | 25 | 28 | ≤ 30 | |
| 65% ethanol, 20 ℃, 2h | 20 | 24 | 28 | ≤ 30 | |
| Outward appearance | Free from extraneous odour, light brown, surfacing, cleaning, quality is even, and crack-free and perforation cover conveniently. | Normal color and luster, free from extraneous odour, surfacing, cleaning, quality is even, crack-free and perforation etc. | |||
| Fall down test (1 time) | No rhegma | No rhegma | |||
| Constant temperature test (90+5 ℃ of profit, 60 ℃ of constant temperature, 3min) | There is not distortion, no peeling, no wrinkling, no smear is leaked. | There is not distortion, no peeling, no wrinkling, no smear is leaked. | |||
3. preparation technology of the present invention is simple, easy handling, yield rate height.
Below with embodiment fully biodegradable foamed composition of the present invention and molding method for preparing thereof are further described; to help composition of the present invention and molding method for preparing and the further understanding of advantage do thereof, protection scope of the present invention is not subjected to the qualification of these embodiment.
Embodiment 1
The fully biodegradable foamed composition of present embodiment consists of:
Treated starch ruin structurizing starch (with W-Gum be raw material system ruin structurizing starch, Ruidebao Biological Degradation Products Co, Beijing City sells) be 50% weight percentage (getting 500 grams);
The thick vegetable fibre of vegetable fibre straw is 40% weight percentage (getting 400 grams);
The cementing agent gelatin is 6% weight percentage (getting 60 grams);
Softening agent glycerine is 1% weight percentage (getting 10 grams);
Incremental dose of hydrogenated fat 1% weight percentage (getting 10 grams);
Nucleator titanium dioxide (TiO
2) be 1% weight percentage (getting 10 grams);
Whipping agent sodium bicarbonate (NaHCO
3) be 1% weight percentage (getting 10 grams).
Its molding method for preparing is, in above-mentioned composition material, add 30% water (300 gram water) of composition material gross weight after, with the stirring velocity of 170rpm under 40 ℃ temperature, mix and stirred 13 minutes, the raw material stirring that will add water mixes, and forms uniform mashed prod, and preheated mold is injected in metering, die temperature is 160 ℃, in 160 ℃ temperature, hot-forming under the condition of pressure 0.14MPa, 120 seconds hot-forming time, the demoulding, and do not sprayed the product of glue.After go-on-go, in gauge pressure 0.05MPa, under 40 ℃ the temperature, spray glue with the gelatine solution of 40% weight percentage, formed spray glue product in 110 seconds in 120 ℃ of bakings behind the spray glue, adopt the GB18006.1-1999 test sample, the results are shown in Table 1.
Embodiment 2
The fully biodegradable foamed composition of present embodiment consists of:
Treated starch phosphate ester starch (commercially available, Beijing Red Star starch factory) is 80% weight percentage (getting 800 grams);
The thick vegetable fibre of vegetable fibre bagasse is 10% weight percentage (getting 100 grams);
Cementing agent gelatine is 5% weight percentage (getting 50 grams);
The softening agent polyoxyethylene glycol is 2% weight percentage (getting 20 grams);
Incremental dose of hydrogenated fat is 1% weight percentage (getting 10 grams);
Nucleator silicon-dioxide (SiO
2) be 1% weight percentage (getting 10 grams);
Whipping agent bicarbonate of ammonia (NH
4HCO
3) be 1% weight percentage (getting 10 grams).
Its molding method for preparing is basic identical with embodiment 1, only different is in composition material, add 50% water (500 gram water) of composition material gross weight after, stirring velocity with 200rpm, under 55 ℃ temperature, mix and stirred 10 minutes, die temperature is 180 ℃, temperature in 180 ℃, the 150 seconds hot-forming time under the condition of pressure 0.15MPa is in gauge pressure 0.07MPa, under 45 ℃ the temperature, gelatin solution with 50% weight percentage sprays glue, form product in 100 seconds in 140 ℃ of oven dry again, adopt the GB18006.1-1999 test sample, the results are shown in Table 1.
Embodiment 3
The fully biodegradable foamed composition of present embodiment consists of:
Treated starch Sumstar 190 (commercially available, Beijing Red Star starch factory) is 64% weight percentage (getting 640 grams);
Vegetable fibre beet pulp plant crude fiber is 20% weight percentage (getting 200 grams);
The cementing agent sodium alginate is 10% weight percentage (getting 100 grams);
The softening agent propylene glycol is 2% weight percentage (getting 20 grams);
Incremental dose of C
12-C
13The Witepsol W-S 55 of lipid acid is 1% weight percentage (getting 10 grams);
Nucleator aluminum oxide (Al
2O
3) be 2% weight percentage (getting 20 grams);
The whipping agent sodium bicarbonate is 1% weight percentage (getting 10 grams).
Its molding method for preparing is basic identical with embodiment 1, only different is in composition material, add 25% water (250 gram water) of composition material gross weight after, stirring velocity with 120rpm, under 35 ℃ temperature, mix and stirred 15 minutes, die temperature is 140 ℃, temperature in 140 ℃, the 90 seconds hot-forming time under the condition of pressure 0.13MPa is in gauge pressure 0.02MPa, under 30 ℃ the temperature, corn gum solution with 30% weight percentage sprays glue, form product in 120 seconds in 100 ℃ of bakings again, utilize the GB18006.1-1999 test sample, the results are shown in Table 1.
Embodiment 4
The fully biodegradable foamed composition of present embodiment consists of:
The treated starch denaturated starch by acid is 50% weight percentage (getting 500 grams);
Vegetable fibre Pericarppium arachidis hypogaeae plant crude fiber is 30% weight percentage (getting 300 grams);
The cementing agent chitosan is 8% weight percentage (getting 80 grams);
Softening agent sorbyl alcohol (or tetramethylolmethane) is 1% weight percentage (getting 10 grams);
Incremental dose of hydrogenated fat is 2% weight percentage (getting 20 grams);
Nucleator silicon-dioxide (SiO
2) be 0.5% weight percentage (getting 5 grams);
Whipping agent bicarbonate of ammonia (NH
4HCO
3) be 8.5% weight percentage (getting 85 grams).
Its molding method for preparing is identical with embodiment 1.
Claims (17)
1. a fully biodegradable foamed composition is characterized in that it contains
1) treated starch 50-80% weight percentage,
2) vegetable fibre 10-40% weight percentage,
3) cementing agent 5-10% weight percentage,
4) softening agent 1-5% weight percentage,
5) incremental dose of 0.5-2% weight percentage,
6) nucleator 0.5-2% weight percentage,
7) whipping agent 1-10% weight percentage.
2. according to a kind of fully biodegradable foamed composition of claim 1, it is characterized in that said treated starch is to ruin wherein a kind of of structurizing starch, phosphate ester starch, Sumstar 190, denaturated starch by acid or two kinds or three kinds.
3. according to a kind of fully biodegradable foamed composition of claim 1, it is characterized in that the thick vegetable fibre of said vegetable fibre for from wherein a kind of of bagasse, tangerine bar, bamboo, beet pulp, rice husk, Pericarppium arachidis hypogaeae or two kinds or three kinds of wastes, extracting.
4. according to a kind of fully biodegradable foamed composition of claim 1, it is characterized in that said cementing agent is wherein a kind of of gelatin, gelatine, sodium alginate, chitosan, xanthan gum or two kinds or three kinds.
5. according to a kind of fully biodegradable foamed composition of claim 1, it is characterized in that said softening agent is lower molecular weight polyvalent alcohol or the organic softening agent of lower molecular weight.
6. according to a kind of fully biodegradable foamed composition of claim 5, it is characterized in that said low-molecular-weight polyvalent alcohol is wherein a kind of of polyoxyethylene glycol, polyoxyethylene oxypropylene, polypropylene glycol.
7. according to a kind of fully biodegradable foamed composition of claim 5, it is characterized in that the organic softening agent of said lower molecular weight is wherein a kind of of glycerine, propylene glycol, sorbyl alcohol, tetramethylolmethane.
8. according to a kind of fully biodegradable foamed composition of claim 1, it is characterized in that said incremental dose is animal and plant fat or ester.
9. a kind of fully biodegradable foamed composition according to Claim 8 is characterized in that, said animal and plant fat is hydrogenated fat, and said ester is C
12-C
13The Witepsol W-S 55 of lipid acid.
10. according to a kind of fully biodegradable foamed composition of claim 1, it is characterized in that said nucleator is wherein a kind of of aluminum oxide, magnesium oxide, silicon-dioxide, titanium dioxide or two kinds or three kinds.
11. a kind of fully biodegradable foamed composition according to claim 1 is characterized in that, said whipping agent is wherein a kind of of sodium bicarbonate, bicarbonate of ammonia, water.
12. its shaping process of a fully biodegradable foamed composition is characterized in that,
1) presses treated starch 50-80% weight percentage, vegetable fibre 10-40% weight percentage, cementing agent 5-10% weight percentage, softening agent 1-5% weight percentage, incremental dose of 0.5-2% weight percentage, nucleator 0.5-2% weight percentage, the prescription of whipping agent 1-10% weight percentage is got raw material ready
2) add the water of composition material gross weight 20-50% in composition material, after the raw material stirring that will add entry mixes, annotate film, hot-forming, hot-forming temperature is 140-180 ℃, and pressure is 0.13-0.15MPa, demoulding.
13. its shaping process according to a kind of fully biodegradable foamed composition of claim 12 is characterized in that when raw material stirring was mixed, its stirring velocity was 120-200rpm, temperature is 30-55 ℃, mixes 10-15 minute.
14. its shaping process according to a kind of fully biodegradable foamed composition of claim 12 is characterized in that hot-forming pressure is 0.13-0.15MPa, temperature is 140-180 ℃, hot-forming time 90-150 second.
15. its shaping process according to a kind of fully biodegradable foamed composition of claim 12 is characterized in that, sprays glue behind the demoulding, the gauge pressure of spray glue is 0.02-0.07MPa, and temperature is 30-45 ℃.
16. its shaping process according to a kind of fully biodegradable foamed composition of claim 15 is characterized in that, behind the spray glue under 100-140 ℃ temperature baking 100-120 second.
17. its shaping process according to a kind of fully biodegradable foamed composition of claim 15 is characterized in that the glue that is sprayed is the glue of corn gum, chitin, seaweed gel, gelatin, gelatine a kind of 30-50% weight percentage that is mixed with wherein.
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|---|---|---|---|
| CN 00106182 CN1328082A (en) | 2000-06-14 | 2000-06-14 | Fully biodegradable foamed composition and its shaping process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00106182 CN1328082A (en) | 2000-06-14 | 2000-06-14 | Fully biodegradable foamed composition and its shaping process |
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| CN101491406B (en) * | 2008-01-21 | 2010-09-22 | 闫羽 | Full-degradable disposable tableware and production method thereof |
| CN101967293A (en) * | 2010-10-11 | 2011-02-09 | 内蒙古大学 | Method for preparing boards from carboxymethyl starch serving as binding agent and waste plant fibers |
| CN101475709B (en) * | 2008-01-04 | 2012-03-21 | 财团法人工业技术研究院 | Preparation of starch foaming body |
| CN102516494A (en) * | 2011-12-15 | 2012-06-27 | 广西吉宽太阳能设备有限公司 | Foaming composition for water tank of solar water heater |
| CN102617891A (en) * | 2012-04-09 | 2012-08-01 | 杭州电子科技大学 | Method for preparing degradable foam by using walnut shell residues and corn starch |
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| WO2013173939A1 (en) * | 2012-05-21 | 2013-11-28 | Chong Chenpang | Manufacturing process for rice husk fiber synthetic resin powder and rice husk fiber product |
| CN106800674A (en) * | 2017-01-10 | 2017-06-06 | 广州绿发材料科技有限公司 | Starch foaming product and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101475709B (en) * | 2008-01-04 | 2012-03-21 | 财团法人工业技术研究院 | Preparation of starch foaming body |
| CN101491406B (en) * | 2008-01-21 | 2010-09-22 | 闫羽 | Full-degradable disposable tableware and production method thereof |
| CN101967293A (en) * | 2010-10-11 | 2011-02-09 | 内蒙古大学 | Method for preparing boards from carboxymethyl starch serving as binding agent and waste plant fibers |
| CN101967293B (en) * | 2010-10-11 | 2011-11-02 | 内蒙古大学 | Method for preparing boards from carboxymethyl starch serving as binding agent and waste plant fibers |
| CN102516494A (en) * | 2011-12-15 | 2012-06-27 | 广西吉宽太阳能设备有限公司 | Foaming composition for water tank of solar water heater |
| CN102617891A (en) * | 2012-04-09 | 2012-08-01 | 杭州电子科技大学 | Method for preparing degradable foam by using walnut shell residues and corn starch |
| CN102617891B (en) * | 2012-04-09 | 2014-03-05 | 杭州电子科技大学 | Method for preparing degradable foam by using walnut shell residues and corn starch |
| US9637636B2 (en) | 2012-05-21 | 2017-05-02 | Husk's Green Technology Co., Limited | Manufacturing process for rice husk fiber synthetic resin powder and rice husk fiber product |
| WO2013173939A1 (en) * | 2012-05-21 | 2013-11-28 | Chong Chenpang | Manufacturing process for rice husk fiber synthetic resin powder and rice husk fiber product |
| CN103321091A (en) * | 2013-06-06 | 2013-09-25 | 陕西科技大学 | Manufacturing method of novel degradable nontoxic disposable fast food bowl |
| CN103321091B (en) * | 2013-06-06 | 2015-07-22 | 陕西科技大学 | Manufacturing method of novel degradable nontoxic disposable fast food bowl |
| CN106800674A (en) * | 2017-01-10 | 2017-06-06 | 广州绿发材料科技有限公司 | Starch foaming product and preparation method thereof |
| CN110358132A (en) * | 2019-07-24 | 2019-10-22 | 贵州精一电力线路器材有限责任公司 | A kind of electric pole and preparation method thereof |
| CN110358132B (en) * | 2019-07-24 | 2021-09-17 | 贵州精一电力线路器材有限责任公司 | Telegraph pole and preparation method thereof |
| CN111154147A (en) * | 2020-01-15 | 2020-05-15 | 张绍为 | Environment-friendly degradable buffer packaging material and preparation method thereof |
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