CN101942115A - Biodegradable thermoplastic starch resin, preparation method thereof and products thereof - Google Patents
Biodegradable thermoplastic starch resin, preparation method thereof and products thereof Download PDFInfo
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Abstract
The invention discloses biodegradable thermoplastic starch resin, a preparation method thereof and products thereof. The resin comprises the following components in part by weight: 55 to 65 parts of food-grade starch, 10 to 20 parts of diglycol, 0.5 to 1.5 parts of octadecanoic acid, 1.5 to 2.5 parts of calcium stearate, 0.5 to 1.5 parts of monoglyceride, 8 to 20 parts of ethylene-acrylic acid copolymer, 1 to 10 parts of high-fusion-index polypropylene and 5 to 15 parts of low-fusion-index polypropylene. Compared with the biodegradable starch resin of which the component content is not in the range of the invention, the biodegradable thermoplastic starch resin provided by the invention is more advantageous in processing performance and biodegradation performance. The biodegradable thermoplastic starch resin can be used for manufacturing toy sheet plastic-absorption products, bean curd boxes, soft drink flexible packaging boxes, disposal hotel bath tool packages, seedling cups or pesticide bottles.
Description
Technical field
The present invention relates to a kind of biological degradation thermoplastic starch resin and preparation method thereof and goods, relate more specifically to the biological degradation thermoplastic starch resin and preparation method thereof and the goods of a kind of high-content of starch, high degradation rate.
Background technology
Disposable plastic goods that provide in the market such as farmland film, seedling-raising cup amortizing packaging material, beverage cup, utensils for snack etc. all belong to the product that is difficult to degrade.Because the usage quantity of these products increases gradually in recent years, to such an extent as to form white pollution, cause environmental pollution, influenced ecological balance.
Solve white pollution, various countries take different measure operations according to national conditions separately at present, mainly comprise following several approach: the one, recycle, and the 2nd, burning disposal, the 3rd, adopt degradative resin/plastics.But all there are some problems in these approach in actually operating, for example: disposable plastic refuse reclamation difficulty, the limitation of Li Yonging is very big again, can not form to reclaim and the balance of utilizing, and regenerate inferior can occur; The plastic garbage Pintsch process is prepared complex process such as gasoline, the cost height; Plastic garbage burns, and has both consumed the oxygen in the atmosphere, can produce a large amount of pollution substances again, as hazardous and noxious substances such as oxynitrides, dioxin.
Comprehensive, degradative plastics is best a kind of method that solves white pollution.Existing degradation technique mainly contains photodegradation, biological degradation and optically and biologically degrading three major types.The photodegradation of adding photosensitizers and degradation speed, the degree of depth and the homogeneity of optically and biologically degrading plastics are all poor.And Biodegradable starch class plastics are divided into and directly add starch-type and treated starch type, and treated starch type degradative plastics degraded inductive phase is long and effect is relatively poor; The degradation property of degradative plastics that directly adds high-content starch is good, but intensity, toughness etc. usually can not replace original resin.
Application number is the blend of having adopted degradable high polymer material and natural macromolecular material in 200710190063.8 the patent, in the hope of solving the contradiction between performance and cost, wherein, the content of poly(lactic acid) and thermoplastic starch is 1: 1 substantially, though it is this scheme makes moderate progress to the performance of product, still not ideal enough and cost is still very high.
Summary of the invention
Therefore, the object of the present invention is to provide a kind of good processability, the high-content of starch of biodegradability excellence, high degradation rate biological degradation thermoplastic starch resin and preparation method thereof and the goods that use this biological degradation thermoplastic starch resin manufacture.
The invention provides a kind of biological degradation thermoplastic starch resin, its composition is counted as follows by weight: food-grade starches 55-65 part, glycol ether 10-20 part, stearic acid 0.5-1.5 part, calcium stearate 1.5-2.5 part, Tegin 55G 0.5-1.5 part, titanium dioxide 0.5-2.5 part, ethylene-acrylic acid copolymer 8-20 part, high molten polypropylene 1-10 part, the eutectic of referring to refer to polypropylene 5-15 part.
According to biological degradation thermoplastic starch resin provided by the invention, wherein, described food-grade starches can be the food-grade starches of various routines, for example, can be in W-Gum, wheat starch, tapioca (flour), sweet potato starch and the potato starch one or more; Under the preferable case, in order to make the Biodegradable starch resin obtain better processability energy and mechanical property, the fineness of described food-grade starches can be the 100-600 order, be preferably the 100-200 order, water content can be 12-14wt%, and every physical and chemical index and sanitary index all meet GB GB/T8883-88 top grade standard.
Wherein, the density of described mono-glycerides can be 0.9-0.93g/cm
3, ester content 〉=30% for example, can be 30-35%; The number-average molecular weight of described ethylene-acrylic acid copolymer can be 15-20 ten thousand, molecular weight distribution can be 1.1-1.4, preferred molecular weight distribution is 1.2, melting index can restrain for 12-18/10 minutes (190 ℃, 2.16kg), acrylic acid content can be 8-10%, and density can be 0.92-0.96g/cm
3
According to biological degradation thermoplastic starch resin provided by the invention, wherein, according to Biodegradable starch resin provided by the invention, wherein, described height melts the finger polypropylene and low melting refers to that polyacrylic notion is conventionally known to one of skill in the art, for example, described height melts the polyacrylic number-average molecular weight of finger can be 8-15 ten thousand, and molecular weight distribution can be 1.1-1.4, and preferred molecular weight distribution is 1.2, its melting index can restrain for 25-30/and 10 minutes, density can be 0.9-0.91g/cm
3Described low melting refers to that polyacrylic number-average molecular weight can be 10-15 ten thousand, and molecular weight distribution can be 1.1-1.4, and preferred molecular weight distribution is 1.2, its melting index can restrain for 2-7/and 10 minutes, be preferably 2-5 gram/10 minutes, density can be 0.9-0.91g/cm
3
Of the present invention a kind of preferred embodiment in, for the processing characteristics and the biodegradability that make biological degradation thermoplastic starch resin better, its form by weight counting can for: food-grade starches 58-62 part, glycol ether 12-18 part, stearic acid 0.8-1.2 part, calcium stearate 1.8-2.2 part, Tegin 55G 0.8-1.2 part, titanium dioxide 1.5-2.5 part, ethylene-acrylic acid copolymer 8-15 part, high molten polypropylene 3-8 part, the eutectic of referring to refer to polypropylene 8-12 part.
For example, in a kind of most preferred embodiment, the composition of this biological-degradable starch thermoplasticity powder resin is counted as follows by weight: 60 parts of food-grade starches, 15 parts of glycol ethers, 1 part of stearic acid, 2 parts of calcium stearates, 1 part of Tegin 55G, 2 parts of titanium dioxides, 10 parts of ethylene-acrylic acid copolymers, high molten 5 parts of polypropylene, the eutectic of referring to refer to 10 parts of polypropylene.
The present invention also provides the preparation method of above-mentioned biological degradation thermoplastic starch resin, and this method comprises: food-grade starches is carried out ultrafining treatment, and making its fineness is 100-600 order (for example, fineness is the 100-200 order); All the other components are added, and add the water of equal amount, in mixing machine, mix and finish pre-gelatinization; The material that pre-gelatinization is good adds twin screw extruder, carries out the gelatinization grafting under 170-180 ℃; Holding temperature is at 165-170 ℃ of filtration, extruding pelletization then.
According to method provided by the invention, wherein, the water of described equal amount can make the water content of starch reach 20-30 weight %, is preferably 22-28 weight %, for example, can be 25 weight %.
The present invention also provides and has used biological degradation thermoplastic starch resin of the present invention or by the goods of the biological degradation thermoplastic starch production of resins of method for preparing.Wherein, these goods can be circle or circular arc sheet material, perhaps are plastic uptake or blow molded product, for example toy sheet material Blister product, bean curd box, soft soft package of beverage box, hotel with the disposable apparatus of washing one's face and rinsing one's mouth pack, seedling-raising cup, toy for children or pesticide bottle.
Compare with the biological degradation thermoplastic starch resin of prior art, biological degradation thermoplastic starch resin provided by the invention has following advantage:
1. tensile strength＞20Mpa, elongation at break 〉=50%, density: 1.20g/cm
3, ethane extract≤4.0%, shore hardness＞51, shrinking percentage 2%, melting index be 4-8 gram/10 minutes (190 ℃, 2.16kg), the starch content height, good toughness has certain fluidity, is applicable to do circular arc, circular sheet material, plastic uptake, blow molded product, Color is splendid, and the inferior light of color and luster is true;
2. strength ratio polypropylene (PP) is poor slightly, but toughness and bending strength ratio PP are strong, especially this has the material of polarity and nonpolar functional group to add ethylene-acrylic acid copolymer (EAA), starch and PP consistency are reached good order and condition, product surface smooth finish can reach PP and require Δ 8-Δ 9, flexural strength and shock resistance are higher by 10% than PP simultaneously, be ideal soft package plastic uptake product comparatively, as disposable plastic uptake, injecting products such as bean curd box, disposable toothpaste, seedling-raising cup, pesticide bottle (small-sized), toys for children;
3. biomass content is up to 80%, and biological degradation rate surpasses international standard (China); High-content of starch of the present invention, high degradation rate, biological degradation thermoplastic starch resin can be processed into product with polyolefins material mixing such as PP, PE, PVA, and finished product very easily are decomposed into the friendly material of soil under the environment that has microorganism to exist; The performance of this product meets or exceeds the GB/T21661-2008 standard;
4. use the food-grade starches preparation, more environmental protection, nontoxic, harmless;
5. the low price of this product is lower than general PE, PP etc., helps reducing the cost of degradable product.
Embodiment
Below in conjunction with embodiment the present invention is further described in detail, the embodiment that provides is only in order to illustrate the present invention, rather than in order to limit the scope of the invention.
Embodiment 1
Present embodiment is used to illustrate biological degradation thermoplastic starch resin provided by the invention and preparation method thereof.
Raw material consists of: 60 kilograms of food-grade corn starch, 15 kilograms of glycol ethers, 1 kilogram of stearic acid, 2 kilograms of calcium stearates, 1 kilogram of Tegin 55G, 2 kilograms of titanium dioxides, 10 kilograms of ethylene-acrylic acid copolymers, high molten 5 kilograms of polypropylene and the eutectic of referring to refer to 10 kilograms of polypropylene.Wherein, the water content of W-Gum is 13wt%; The density of mono-glycerides is 0.916g/cm
3, ester content is 30%; The number-average molecular weight of ethylene-acrylic acid copolymer is 150,000, and molecular weight distribution is 1.2, and melting index is that (190 ℃, 2.16kg), density was 0.925g/cm to 15 grams in/10 minutes
3, acrylic acid content is 8%; The polyacrylic number-average molecular weight of high molten finger is 100,000, and molecular weight distribution is 1.2, and melting index is 28 grams/10 minutes, and density is 0.905g/cm
3Eutectic refers to that polyacrylic number-average molecular weight is 120,000, and molecular weight distribution is 1.2, and melting index is 5 grams/10 minutes, and density is 0.905g/cm
3
Preparation process is as follows:
(1) food-grade corn starch is carried out ultrafining treatment, making its fineness is 110 orders, sieves;
(2) all the other raw materials are added, and add 7.2 kg water, in high-speed mixer, mix and finish pre-gelatinization;
(3) will add twin screw extruder by the good material of the pre-gelatinization of step (2), under 175 ℃, carry out the gelatinization grafting;
(4) under 168 ℃, material filtering, extruding pelletization that step (3) is obtained promptly obtain Biodegradable starch resin of the present invention, and note is made A1.
Embodiment 2
Present embodiment is used to illustrate biological degradation thermoplastic starch resin provided by the invention and preparation method thereof.
Raw material consists of: 56 kilograms of food grade wheat starches, 20 kilograms of glycol ethers, 1.2 kilograms of stearic acid, 1.8 kilograms of calcium stearates, 1 kilogram of Tegin 55G, 1.5 kilograms of titanium dioxides, 18 kilograms of ethylene-acrylic acid copolymers, high molten 8 kilograms of polypropylene and the eutectic of referring to refer to 12 kilograms of polypropylene.Wherein, the water content of W-Gum is 13wt%; The density of mono-glycerides is 0.916g/cm
3, ester content is 〉=30%; The number-average molecular weight of ethylene-acrylic acid copolymer is 200,000, and molecular weight distribution is 1.2, and melting index is that (190 ℃, 2.16kg), density was 0.95g/cm to 15 grams in/10 minutes
3, acrylic acid content is 10%; The polyacrylic number-average molecular weight of high molten finger is 150,000, and molecular weight distribution is 1.2, and melting index is 25 grams/10 minutes, and density is 0.905g/cm
3Eutectic refers to polyacrylic number-average molecular weight 100,000, and molecular weight distribution is 1.2, and melting index is 7 grams/10 minutes, and density is 0.88g/cm
3
Preparation process is as follows:
(1) the food grade wheat starch is carried out ultrafining treatment, making its fineness is 100 orders, sieves;
(2) all the other raw materials are added, and add 6.2 kg water, in high-speed mixer, mix and finish pre-gelatinization;
(3) will add twin screw extruder by the good material of the pre-gelatinization of step (2), under 172 ℃, carry out the gelatinization grafting;
(4) under 166 ℃, material filtering, extruding pelletization that step (3) is obtained promptly obtain Biodegradable starch resin of the present invention, and note is made A2.
Embodiment 3
Present embodiment is used to illustrate biological degradation thermoplastic starch resin provided by the invention and preparation method thereof.
Raw material consists of: 65 kilograms of food grade potato starches, 10 kilograms of glycol ethers, 1.3 kilograms of stearic acid, 1.5 kilograms of calcium stearates, 1.5 kilograms of Tegin 55Gs, 0.8 kilogram of titanium dioxide, 16 kilograms of ethylene-acrylic acid copolymers, high molten 10 kilograms of polypropylene and the eutectic of referring to refer to 7 kilograms of polypropylene.Wherein, the water content of starch is 14wt%; The density of mono-glycerides is 0.92g/cm
3, ester content is 〉=30%; The number-average molecular weight of ethylene-acrylic acid copolymer is 200,000, and molecular weight distribution is 1.2, and melting index is that (190 ℃, 2.16kg), density was 0.94g/cm to 15 grams in/10 minutes
3, acrylic acid content is 9%; The polyacrylic number-average molecular weight of high molten finger is 80,000, and molecular weight distribution is 1.2, and melting index is 30 grams/10 minutes, and density is 0.908g/cm
3Eutectic refers to that polyacrylic number-average molecular weight is 100,000, and molecular weight distribution is 1.2, and melting index is 3 grams/10 minutes, and density is 0.89g/cm
3
Preparation process is as follows:
(1) the food grade potato starch is carried out ultrafining treatment, making its fineness is 150 orders, sieves;
(2) all the other raw materials are added, and add 7.15kg water, in high-speed mixer, mix and finish pre-gelatinization;
(3) will add twin screw extruder by the good material of the pre-gelatinization of step (2), under 178 ℃, carry out the gelatinization grafting;
(4) under 167 ℃, material filtering, extruding pelletization that step (3) is obtained promptly obtain Biodegradable starch resin of the present invention, and note is made A3.
Embodiment 4
Present embodiment is used to illustrate biological degradation thermoplastic starch resin provided by the invention and preparation method thereof.
Prepare starch-resin according to the preparation process identical with embodiment 1, different is the raw material that replaces embodiment 1 with the following raw material of present embodiment: 57 kilograms of food grade tapioca (flour)s, 18 kilograms of glycol ethers, 0.8 kilogram of stearic acid, 2.5 kilograms of calcium stearates, 0.7 kilogram of Tegin 55G, 1 kilogram of titanium dioxide, 10 kilograms of ethylene-acrylic acid copolymers, high molten 3 kilograms of polypropylene and the eutectic of referring to refer to 5 kilograms of polypropylene.Wherein, the water content of starch is 13wt%, and fineness is 180 orders; The density of mono-glycerides is 0.916g/cm
3, ester content is 33%; The number-average molecular weight of ethylene-acrylic acid copolymer is 180,000, and molecular weight distribution is 1.2, and melting index is 15 grams/10 minutes, and density is 0.93g/cm
3, acrylic acid content is 9%; The polyacrylic number-average molecular weight of high molten finger is 120,000, and molecular weight distribution is 1.2, and melting index is 28 grams/10 minutes, and density is 0.905g/cm
3Eutectic refers to that polyacrylic number-average molecular weight is 130,000, and molecular weight distribution is 1.2, and melting index is 5 grams/10 minutes, and density is 0.905g/cm
3The Biodegradable starch resin note that makes is made A4.
Embodiment 5
Present embodiment is used to illustrate biological degradation thermoplastic starch resin provided by the invention and preparation method thereof.
Prepare starch-resin according to the preparation process identical with embodiment 1, different is the raw material that replaces embodiment 1 with the following raw material of present embodiment: 60 kilograms of food grade sweet potato starch, 12 kilograms of glycol ethers, 1.5 kilograms of stearic acid, 2 kilograms of calcium stearates, 1.2 kilograms of Tegin 55Gs, 1.2 kilograms of titanium dioxides, 8 kilograms of ethylene-acrylic acid copolymers, high molten 1 kilogram of polypropylene and the eutectic of referring to refer to 10 kilograms of polypropylene.Wherein, the water content of starch is 13wt%, and fineness is 100 orders, and the density of mono-glycerides is 0.916g/cm
3, ester content is 〉=30%; The number-average molecular weight of ethylene-acrylic acid copolymer is 160,000, and molecular weight distribution is 1.2, and melting index is 15 grams/10 minutes, and density is 0.925g/cm
3, acrylic acid content is 10%; The polyacrylic number-average molecular weight of high molten finger is 90,000, and molecular weight distribution is 1.2, and melting index is 28 grams/10 minutes, and density is 0.905g/cm
3Eutectic refers to that polyacrylic number-average molecular weight is 150,000, and molecular weight distribution is 1.2, and melting index is 5 grams/10 minutes, and density is 0.905g/cm
3The Biodegradable starch resin note that makes is made A5.
Comparative Examples 1
This Comparative Examples is used to illustrate not within the scope of the present invention biological degradation thermoplastic starch resin and preparation method thereof of the identical but content of component.
Prepare starch-resin according to the preparation process identical with embodiment 1, different is the raw material that replaces embodiment 1 with the following raw material of this Comparative Examples: 50 kilograms of food-grade corn starch, 9 kilograms of glycol ethers, 0.4 kilogram of stearic acid, 1.4 kilograms of calcium stearates, 0.4 kilogram of Tegin 55G, 0.3 kilogram of titanium dioxide, 21 kilograms of ethylene-acrylic acid copolymers, high molten 11 kilograms of polypropylene and the eutectic of referring to refer to 4 kilograms of polypropylene.Wherein, the water content of W-Gum is 13wt%; The density of mono-glycerides is 0.916g/cm
3, ester content is 〉=30%; The melting index of ethylene-acrylic acid copolymer is 15 grams/10 minutes, and density is 0.925g/cm
3The polyacrylic melting index of high molten finger is 28 grams/10 minutes, and density is 0.905g/cm
3Eutectic refers to that polyacrylic melting index is 5 grams/10 minutes, and density is 0.905g/cm
3The Biodegradable starch resin note that makes is made C1.
Comparative Examples 2
This Comparative Examples is used to illustrate not within the scope of the present invention biological degradation thermoplastic starch resin and preparation method thereof of the identical but content of component.
Prepare starch-resin according to the preparation process identical with embodiment 1, different is the raw material that replaces embodiment 1 with the following raw material of this Comparative Examples: 68 kilograms of food grade potato starches, 21 kilograms of glycol ethers, 1.6 kilograms of stearic acid, 2.6 kilograms of calcium stearates, 1.6 kilograms of Tegin 55Gs, 1.6 kilograms of titanium dioxides, 7 kilograms of ethylene-acrylic acid copolymers, high molten 0.8 kilogram of polypropylene and the eutectic of referring to refer to 16 kilograms of polypropylene.Wherein, the water content of W-Gum is 13wt%; The density of mono-glycerides is 0.916g/cm
3, ester content is 〉=30%; The melting index of ethylene-acrylic acid copolymer is 15 grams/10 minutes, and density is 0.925g/cm
3The polyacrylic melting index of high molten finger is 28 grams/10 minutes, and density is 0.905g/cm
3Eutectic refers to that polyacrylic melting index is 5 grams/10 minutes, and density is 0.905g/cm
3The Biodegradable starch resin note that makes is made C2.
The product performance test
(raise sub-petrochemical industry, following performance F401) is tested, and test result is listed in table 1 for product A 1-A5 that embodiment 1-5 and Comparative Examples 1-2 are made and C1-C2 and PP.
1, biomass content: GB/T2957-2008
2, Rockwell hardness (R): GB/T2411-2008
3, tensile strength: GB1040
4, elongation at break: GB1040
5, flexural strength: GB/T9341-2000
6, shrinking percentage: GB/T17037
7, biological degradation rate: ISO:14855;
Table 1
By the data in the table 1 as can be seen, Biodegradable starch resin of the present invention can reach following index: tensile strength＞20Mpa, elongation at break 〉=50%, and Rockwell hardness＞70, shrinking percentage＜2%, biomass content is up to 80%.With component concentration not within the scope of the present invention Biodegradable starch resin compare, the processing characteristics of Biodegradable starch resin provided by the invention and biodegradability all have clear superiority.Biodegradable starch resin of the present invention can be used for making various circles or circular arc sheet material and plastic uptake or blow molded product, for example toy sheet material Blister product, bean curd box, soft soft package of beverage box, hotel with the disposable apparatus of washing one's face and rinsing one's mouth pack, seedling-raising cup or pesticide bottle.
Claims (11)
1. a biological degradation thermoplastic starch resin is characterized in that, the composition of this biological degradation thermoplastic starch resin is counted as follows by weight:
Food-grade starches 55-65 part
Glycol ether 10-20 part
Stearic acid 0.5-1.5 part
Calcium stearate 1.5-2.5 part
Tegin 55G 0.5-1.5 part
Titanium dioxide 0.5-2.5 part
Ethylene-acrylic acid copolymer 8-20 part
High molten polypropylene 1-10 part that refers to
Eutectic refers to polypropylene 5-15 part.
2. biological degradation thermoplastic starch resin according to claim 1, wherein, described food-grade starches is selected from one or more in W-Gum, wheat starch, tapioca (flour), sweet potato starch and the potato starch.
3. biological degradation thermoplastic starch resin according to claim 1 and 2, wherein, the fineness of described food-grade starches is the 100-600 order, is preferably the 100-200 order, water content is 12-14wt%.
4. according to each described biological degradation thermoplastic starch resin in the claim 1 to 3, wherein, the density of described mono-glycerides is 0.9-0.93g/cm
3, ester content 〉=30%; The number-average molecular weight of described ethylene-acrylic acid copolymer is 15-20 ten thousand, and molecular weight distribution is 1.1-1.4, and preferred molecular weight distribution is 1.2, and melting index is 12-18 gram/10 minutes, and acrylic acid content is 8-10%, and density is 0.92-0.96g/cm
3
5. according to each described biological degradation thermoplastic starch resin in the claim 1 to 4, wherein, it is 25-30 gram/10 minutes that described height melts the polyacrylic melting index of finger; Described low melting refers to that polyacrylic melting index is 2-7 gram/10 minutes.
6. according to each described biological degradation thermoplastic starch resin in the claim 1 to 5, wherein, it is 80,000-150,000 that described height melts the polyacrylic number-average molecular weight of finger, and molecular weight distribution is 1.1-1.4, and preferred molecular weight distribution is 1.2, and density is 0.9-0.91g/cm
3Described low melting refers to that polyacrylic number-average molecular weight is 100,000-150,000, and molecular weight distribution is 1.1-1.4, and preferred molecular weight distribution is 1.2, and density is 0.9-0.91g/cm
3
7. according to each described biological degradation thermoplastic starch resin in the claim 1 to 6, wherein, the composition of this biological degradation thermoplastic starch resin is counted as follows by weight:
Food-grade starches 58-62 part
Glycol ether 12-18 part
Stearic acid 0.8-1.2 part
Calcium stearate 1.8-2.2 part
Tegin 55G 0.8-1.2 part
Titanium dioxide 1.5-2.5 part
Ethylene-acrylic acid copolymer 8-15 part
High molten polypropylene 3-8 part that refers to
Eutectic refers to polypropylene 8-12 part.
8. the preparation method of each described Biodegradable starch resin in the claim 1 to 7 is characterized in that, this method comprises: food-grade starches is carried out ultrafining treatment, and making its fineness is the 100-600 order, is preferably the 100-200 order; All the other components are added, and add the water of equal amount, in mixing machine, mix and finish pre-gelatinization; The material that pre-gelatinization is good adds twin screw extruder, carries out the gelatinization grafting under 170-180 ℃; Holding temperature is at 165-170 ℃ of filtration, extruding pelletization then.
9. method according to claim 8, wherein, the water of described equal amount is to make the water content of starch reach 20-30 weight %, is preferably 22-28 weight %, for example, can be 25 weight %.
10. use the goods of the Biodegradable starch production of resins of each described Biodegradable starch resin in the claim 1 to 7 or claim 8 or 9 described methods preparations.
11. goods according to claim 10, wherein, these goods are circle or circular arc sheet material, perhaps are plastic uptake or blow molded product, for example toy sheet material Blister product, bean curd box, soft soft package of beverage box, hotel with the disposable apparatus of washing one's face and rinsing one's mouth pack, seedling-raising cup or pesticide bottle.
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| JPH09296076A (en) * | 1996-04-25 | 1997-11-18 | Yokuki Tei | Biodegradable starch resin and its preparation |
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| CN1622970A (en) * | 2002-03-29 | 2005-06-01 | 罗先高科技株式会社 | Biodegradable resin composition and manufacturing method thereof |
| US7071249B2 (en) * | 2001-10-05 | 2006-07-04 | William Ho | Biodegradable starch resin and method for making same |
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- 2010-09-03 CN CN2010102730918A patent/CN101942115B/en active Active
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| JPH09296076A (en) * | 1996-04-25 | 1997-11-18 | Yokuki Tei | Biodegradable starch resin and its preparation |
| US7071249B2 (en) * | 2001-10-05 | 2006-07-04 | William Ho | Biodegradable starch resin and method for making same |
| CN1622970A (en) * | 2002-03-29 | 2005-06-01 | 罗先高科技株式会社 | Biodegradable resin composition and manufacturing method thereof |
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| 《Starch》 20061026 Ioannis Arvanitoyannis et al. "Biodegradable Films Made from Low Density Polyethylene(LDPE), Ethylene Acrylic Acid(EAA), PolyCaprolactone(PCL) and Wheat Starch for Food Packaging Applications: Part 3" 306-322 1-11 第49卷, 第7-8期 2 * |
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