CN104387621A - Thermoplastic starch material and process for preparing same - Google Patents
Thermoplastic starch material and process for preparing same Download PDFInfo
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- CN104387621A CN104387621A CN201410661635.6A CN201410661635A CN104387621A CN 104387621 A CN104387621 A CN 104387621A CN 201410661635 A CN201410661635 A CN 201410661635A CN 104387621 A CN104387621 A CN 104387621A
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Abstract
The invention relates to a thermoplastic starch material. The thermoplastic starch material is prepared from a starch, a plasticizer and a natural cellulose fiber and is characterized in that the part ratio of the starch, the plasticizer and the natural cellulose fiber is 100:(30-50):(2-20). A process for preparing the thermoplastic starch material comprises the following steps: mixing the natural cellulose fiber with the plasticizer by a high-speed mixer, adding the high amylose starch and mixing the high amylose starch with the natural cellulose fiber and the plasticizer for 15 minutes; extruding and granulating a mixture of the high amylose starch, the natural cellulose fiber and the plasticizer by a twin-screw plasticizing and granulating machine to obtain finished granules, or performing compression molding on the mixture by a thermo-compressing mold, wherein the temperature at a conveying section is 120-150 DEG C, the temperature at a melting section is 125-130 DEG C, the temperature at a mixing section is 130-135 DEG C, the temperature at an exhausting section is 134-135 DEG C and the temperature at a homogenizing section is 140 DEG C; and feeding the highly mixed materials into an injecting and molding machine and performing injection molding, or feeding the granules into the injecting and molding machine and performing injection molding. The components of the thermoplastic starch material are scientific and reasonable, the thermoplastic starch material is reproducible and environment-friendly, can be fully biodegraded without causing pollution and can be used widely.
Description
Technical field
The present invention relates to natural environmental-protective degradation material, is a kind of thermoplastic starch material and preparation technology thereof.
Background technology
Starch has cheapness compared with petrochemical materials, can regenerate, biodegradable, pollutes little and feature that is production process toxicological harmless.Starch causes the attention of many countries in the world in the development and utilization in bio-based degradable environment-friendly material field, and the existing degradable plastics utilizing starch base and derivative thereof to prepare accounts for more than 60% of whole degradable plastics.
Two class methods that existing thermoplastic starch material mainly adopts starch to carry out chemical modification blended with adding water-resistant resin are prepared, and there is preparation process has pollution, can not realize degradable, and environment protecting is not good enough waits deficiency.
Completely natural, environmental protection, the thermoplastic starch material with certain mechanical property and water resistance that is nontoxic and fully biodegradable are the directions of development, some research from the high amylose starch of starch consideration selection material excellent property itself prepare thermoplastic starch [Yang Weining. the characteristic of corn high amylose starch and film forming thereof and acetic acid esterified are studied]; Some interpolation natural fibers carry out enhancing improve mechanical property, but natural fiber complicated components, if do not process with starch poor compatibility [Yao Dongming. sisal fibers strengthens the research of thermoplastic starch powder composite material]..High amylose starch market mainly transgenosis starch, as the high amylose starch of national of the United States Starch Company, and is selected non-transgenic starch to prepare through Component seperation the research that high amylose starch and high-purity cellulose fiber composite improve thermoplastic starch performance not report.
Summary of the invention
The object of the invention is, substantial improvements and innovation are carried out to prior art, provide a kind of component scientific and reasonable, renewable, biodegradable, pollution-free, be beneficial to environmental protection, broad-spectrum thermoplastic starch material; And provide and do not adopt chemical modification, only by physics Component seperation, shorten flow process, reduce costs, production process is pollution-free, nontoxic, the preparation method of good product quality.
The technical scheme realizing object of the present invention employing is: a kind of thermoplastic starch material, it comprises starch, softening agent and natural cellulose, it is characterized in that, described starch is high amylose starch, and part of high amylose starch, softening agent and natural cellulose is than being 100:30 ~ 50:2 ~ 20.
Described high amylose starch comprises at least one of W-Gum, potato starch, green starch, pea starch, its amylose content 40% ~ 90%;
Described softening agent is glycerine, or the mixture of G & W.
Described natural cellulose is the viscose fiber pulp of the wood pulp of content of cellulose 98% ~ 100%, cotton pulp, jute pulp or bamboo pulp.
The technical scheme realizing another object of the present invention employing is: a kind of thermoplastic starch material, it comprises starch, softening agent and native cellulose fibre, it is characterized in that, described starch is high amylose starch, and part of high amylose starch, softening agent and native cellulose fibre is than being 100:30 ~ 50:2 ~ 20.
Described high amylose starch comprises at least one of the W-Gum of the high amylose content by Component seperation, potato starch, green starch, pea starch, wherein amylose content 40% ~ 90%;
Described softening agent is glycerine, or the mixture of G & W.
Described native cellulose fibre is the viscose fiber pulp of the wood pulp of content of cellulose 98% ~ 100%, cotton pulp, jute pulp or bamboo pulp, and the rotation screening pulverizer through 2mm aperture is pulverized and obtained.
A preparation technology for thermoplastic starch material, is characterized in that, it comprises the following steps:
1) native cellulose fibre selecting the high amylose starch of amylose content 40% ~ 90%, softening agent and content 98% ~ 100% is raw material, by mass parts ratio, described high amylose starch 100 parts, 30 ~ 50 parts described, softening agent and described native cellulose fibre 2 ~ 20 parts, use 500 ~ 1000r/min high speed mixer, first mix with softening agent than by native cellulose fibre by described part, mixing time 5 ~ 8min, ensure that native cellulose fibre is fully swelling, put into high direct-connected starch by described part ratio again and be mixed to 15 min, raw material is fully mixed;
2) extruding pelletization, use dual-screw-stem machine plasticizing tablets press, screw speed 50 ~ 600r/min, transportation section temperature is 120 ~ 125 DEG C, melt zone temperature is 125 ~ 130 DEG C, mixing section 130 ~ 135 DEG C, exhaust section 135 ~ 134 DEG C, homogenizing zone 140 DEG C, carry out convey materials by transportation section, prevent flash; By melt zone heat trnasfer and fricting shearing, make the abundant melting of material and homogenizing; Make the further refinement of material component size with even by mixing section; Steam, low molecular weight substance impurity is discharged by exhaust section; Carried and supercharging by homogenizing zone, set up setting pressure, make die orifice place material have density, mix further simultaneously, finally reach and extrude finished pellets smoothly, or by hot press die compressed moulding, make finished product moulding mixture;
3) injection molding, batch mixing step 1) obtained feeding injection moulding machine direct injection is shaping makes finished product moulding mixture; Or by step 2) finished pellets extruded sends into injection moulding machine injection molding and make finished product moulding mixture.
At screw rod and the mould mouth spraying Teflon modified coating of described twin screw plasticizing tablets press.
At described mould surface spraying Teflon modified coating.
Thermoplastic starch material component of the present invention is scientific and reasonable, renewable, biodegradable, pollution-free, is beneficial to environmental protection, of many uses.
The preparation method of thermoplastic starch material of the present invention, due to preferred high amylose content starch, high amylose starch is the high amylose starch of the content 40% ~ 90% obtained through Component seperation starch, that is chemical modification need not be carried out to starch, high speed mixer is passed through as thermoplastic starch and preferred native cellulose fibre and softening agent with high amylose starch, just can prepare thermoplastic starch material by extruding pelletization again, the mechanics of the thermoplastic starch material of preparation and water resistance good; Because native cellulose fibre and high amylose starch have same monomer glucose, so easily plastified by identical softening agent, just plasticizing rate is different, so easily compatible when blended, cellulosic fibre is uniformly dispersed, and maintains the transparency of thermoplastic starch; Owing to plastifying screw rod and the grinding tool mouth spraying Teflon modified coating of tablets press at described twin screw, at described mould surface spraying Teflon modified coating, contribute to the adhesion reducing thermoplastic starch, improve the glossy effect of materials processing mobility and finished surface; Have flow process short, cost is low, and production process is pollution-free, nontoxic, and the good product quality of preparation is renewable, biodegradable, pollution-free, nontoxic, is beneficial to environmental protection, the advantage such as of many uses.
Embodiment
Below in conjunction with embodiment, the invention will be further described.
Embodiment given by the specific embodiment of the invention is also non exhaustive; but should not be construed as limitation of the present invention; without departing from the spirit and substance of the case in the present invention; to amendment or the replacement of the not creative work that product of the present invention and preparation method thereof is done, all belong to the scope of the claims in the present invention protection.
Embodiment 1: a kind of thermoplastic starch material, comprises starch, softening agent and native cellulose fibre, and described starch is high amylose starch, and part of high amylose starch, softening agent and native cellulose fibre is than being 100:30:2.
Embodiment 2: a kind of thermoplastic starch material, comprises starch, softening agent and native cellulose fibre, and described starch is high amylose starch, and part of high amylose starch, softening agent and native cellulose fibre is than being 100:35:2.
Embodiment 3: a kind of thermoplastic starch material, comprises starch, softening agent and native cellulose fibre, and described starch is high amylose starch, and part of high amylose starch, softening agent and native cellulose fibre is than being 100:40:2.
Embodiment 4: a kind of thermoplastic starch material, comprises starch, softening agent and native cellulose fibre, and described starch is high amylose starch, and part of high amylose starch, softening agent and native cellulose fibre is than being 100:45:2.
Embodiment 5: a kind of thermoplastic starch material, comprises starch, softening agent and native cellulose fibre, and described starch is high amylose starch, and part of high amylose starch, softening agent and native cellulose fibre is than being 100:50:2.
Embodiment 6: a kind of thermoplastic starch material, comprises starch, softening agent and native cellulose fibre, and described starch is high amylose starch, and part of high amylose starch, softening agent and native cellulose fibre is than being 100:30:5.
Embodiment 7: a kind of thermoplastic starch material of embodiment, comprises starch, softening agent and native cellulose fibre, described starch is high amylose starch, and part of high amylose starch, softening agent and native cellulose fibre is than being 100:35:5.
Embodiment 8: a kind of thermoplastic starch material of embodiment, comprises starch, softening agent and native cellulose fibre, described starch is high amylose starch, and part of high amylose starch, softening agent and native cellulose fibre is than being 100:40:5.
Embodiment 9: a kind of thermoplastic starch material of embodiment, comprises starch, softening agent and native cellulose fibre, described starch is high amylose starch, and part of high amylose starch, softening agent and native cellulose fibre is than being 100:45:5.
Embodiment 10: a kind of thermoplastic starch material of embodiment, comprises starch, softening agent and native cellulose fibre, described starch is high amylose starch, and part of high amylose starch, softening agent and native cellulose fibre is than being 100:50:5.
Embodiment 11: a kind of thermoplastic starch material, comprises starch, softening agent and native cellulose fibre, and described starch is high amylose starch, and part of high amylose starch, softening agent and native cellulose fibre is than being 100:30:10.
Embodiment 12: a kind of thermoplastic starch material of embodiment, comprises starch, softening agent and native cellulose fibre, described starch is high amylose starch, and part of high amylose starch, softening agent and native cellulose fibre is than being 100:35:10.
Embodiment 13: a kind of thermoplastic starch material of embodiment, comprises starch, softening agent and native cellulose fibre, described starch is high amylose starch, and part of high amylose starch, softening agent and native cellulose fibre is than being 100:40:10.
Embodiment 14: a kind of thermoplastic starch material of embodiment, comprises starch, softening agent and native cellulose fibre, described starch is high amylose starch, and part of high amylose starch, softening agent and native cellulose fibre is than being 100:45:10.
Embodiment 15: a kind of thermoplastic starch material of embodiment, comprises starch, softening agent and native cellulose fibre, described starch is high amylose starch, and part of high amylose starch, softening agent and native cellulose fibre is than being 100:50:10.
Embodiment 16: a kind of thermoplastic starch material, comprises starch, softening agent and native cellulose fibre, and described starch is high amylose starch, and part of high amylose starch, softening agent and native cellulose fibre is than being 100:30:15.
Embodiment 17: a kind of thermoplastic starch material of embodiment, comprises starch, softening agent and native cellulose fibre, described starch is high amylose starch, and part of high amylose starch, softening agent and native cellulose fibre is than being 100:35:15.
Embodiment 18: a kind of thermoplastic starch material of embodiment, comprises starch, softening agent and native cellulose fibre, described starch is high amylose starch, and part of high amylose starch, softening agent and native cellulose fibre is than being 100:40:15.
Embodiment 19: a kind of thermoplastic starch material of embodiment, comprises starch, softening agent and native cellulose fibre, described starch is high amylose starch, and part of high amylose starch, softening agent and native cellulose fibre is than being 100:45:15.
Embodiment 20: a kind of thermoplastic starch material of embodiment, comprises starch, softening agent and native cellulose fibre, described starch is high amylose starch, and part of high amylose starch, softening agent and native cellulose fibre is than being 100:50:15.
Embodiment 21: a kind of thermoplastic starch material, comprises starch, softening agent and native cellulose fibre, and described starch is high amylose starch, and part of high amylose starch, softening agent and native cellulose fibre is than being 100:30:20.
Embodiment 22: a kind of thermoplastic starch material of embodiment, comprises starch, softening agent and native cellulose fibre, described starch is high amylose starch, and part of high amylose starch, softening agent and native cellulose fibre is than being 100:35:20.
Embodiment 23: a kind of thermoplastic starch material of embodiment, comprises starch, softening agent and native cellulose fibre, described starch is high amylose starch, and part of high amylose starch, softening agent and native cellulose fibre is than being 100:40:20.
Embodiment 24: a kind of thermoplastic starch material of embodiment, comprises starch, softening agent and native cellulose fibre, described starch is high amylose starch, and part of high amylose starch, softening agent and native cellulose fibre is than being 100:45:20.
Embodiment 25: a kind of thermoplastic starch material of embodiment, comprises starch, softening agent and native cellulose fibre, described starch is high amylose starch, and part of high amylose starch, softening agent and native cellulose fibre is than being 100:50:20.
Described high amylose starch comprises at least one of W-Gum, potato starch, green starch, pea starch, its amylose content 40% ~ 90%; Amylose content more preferably 60% ~ 90%
.
Described softening agent is glycerine, or the mixture of G & W.Water-content <20% in the mixture of G & W
.
Described native cellulose fibre is the viscose fiber pulp of the wood pulp of content of cellulose 98% ~ 100%, cotton pulp, jute pulp or bamboo pulp.
The preparation technology of a kind of thermoplastic starch material being embodiment with embodiment 25, the step that it comprises is:
1) high amylose starch, softening agent and content native cellulose fibre is selected to be raw material, by mass parts ratio, described high amylose starch 100 parts, 50 parts described, softening agent and described native cellulose fibre 20 parts, use 500 ~ 1000r/min high speed mixer, first mix with softening agent than by native cellulose fibre by described part, mixing time 5 ~ 8min, ensure that native cellulose fibre is fully swelling, put into high direct-connected starch by described part ratio again and be mixed to 15 min, raw material is fully mixed;
2) extruding pelletization, use dual-screw-stem machine plasticizing tablets press, screw speed 50 ~ 600r/min, transportation section temperature is 120 ~ 125 DEG C, melt zone temperature is 125 ~ 130 DEG C, mixing section 130 ~ 135 DEG C, exhaust section 135 ~ 134 DEG C, homogenizing zone 140 DEG C, carry out convey materials by transportation section, prevent flash; By melt zone heat trnasfer and fricting shearing, make the abundant melting of material and homogenizing; Make the further refinement of material component size with even by mixing section; Steam, low molecular weight substance impurity is discharged by exhaust section; Carried and supercharging by homogenizing zone, set up setting pressure, make die orifice place material have density, mix further simultaneously, finally reach and extrude finished pellets smoothly, or by hot press die compressed moulding, make finished product moulding mixture;
3) injection molding, batch mixing step 1) obtained feeding injection moulding machine direct injection is shaping makes finished product moulding mixture; Or by step 2) finished pellets extruded sends into injection moulding machine injection molding and make finished product moulding mixture.
Other embodiment is identical with the step of preparation process of a kind of thermoplastic starch material of embodiment 25, be only material proportion is respective embodiment.
The preparation technology of a kind of thermoplastic starch material of the present invention easily implements, wherein: Teflon modified paint is the product that Hao Hua chemical industry equipment Manufacturing Co., Ltd of Jingjiang City produces; High amylose starch adopts Chinese invention patent publication number CN101899119A, and name is called high amylose starch raw material prepared by a kind of preparation method of W-Gum; Softening agent is that glycerine adopts good Chemical Co., Ltd.'s production commercially available prod, Zhengzhou hundred; Native cellulose fibre is Shandong Taiyang Paper Industry Co., Ltd.'s production commercially available prod.Preparation technology's equipment used all adopts commercially available prod.Twin screw in commercially available prod plastifies screw rod and the mould mouth spraying Teflon modified coating of tablets press or injection moulding machine.At described mould surface spraying Teflon modified coating.
Claims (7)
1. a thermoplastic starch material, it comprises starch, softening agent and native cellulose fibre, it is characterized in that, described starch is high amylose starch, and part of high amylose starch, softening agent and native cellulose fibre is than being 100:30 ~ 50:2 ~ 20.
2. a kind of thermoplastic starch material according to claim 1, it is characterized in that, described high amylose starch comprises at least one of the W-Gum of the high amylose content by Component seperation, potato starch, green starch, pea starch, wherein amylose content 40% ~ 90%.
3. a kind of thermoplastic starch material according to claim 1, is characterized in that, described softening agent is glycerine, or the mixture of G & W.
4. a kind of thermoplastic starch material according to claim 1, it is characterized in that, described native cellulose fibre is the viscose fiber pulp of the wood pulp of content of cellulose 98% ~ 100%, cotton pulp, jute pulp or bamboo pulp, and the rotation screening pulverizer through 2mm aperture is pulverized and obtained.
5. a preparation technology for thermoplastic starch material, is characterized in that, it comprises the following steps:
1) native cellulose fibre selecting the high amylose starch of amylose content 40% ~ 90%, softening agent and content 98% ~ 100% is raw material, by mass parts ratio, described high amylose starch 100 parts, 30 ~ 50 parts described, softening agent and described native cellulose fibre 2 ~ 20 parts, use 500 ~ 1000r/min high speed mixer, first mix with softening agent than by native cellulose fibre by described part, mixing time 5 ~ 8min, ensure that native cellulose fibre is fully swelling, put into high direct-connected starch by described part ratio again and be mixed to 15 min, raw material is fully mixed;
2) extruding pelletization, use dual-screw-stem machine plasticizing tablets press, screw speed 50 ~ 600r/min, transportation section temperature is 120 ~ 125 DEG C, melt zone temperature is 125 ~ 130 DEG C, mixing section 130 ~ 135 DEG C, exhaust section 135 ~ 134 DEG C, homogenizing zone 140 DEG C, carry out convey materials by transportation section, prevent flash; By melt zone heat trnasfer and fricting shearing, make the abundant melting of material and homogenizing; Make the further refinement of material component size with even by mixing section; Steam, low molecular weight substance impurity is discharged by exhaust section; Carried and supercharging by homogenizing zone, set up setting pressure, make die orifice place material have density, mix further simultaneously, finally reach and extrude finished pellets smoothly, or by hot press die compressed moulding, make finished product moulding mixture;
3) injection molding, batch mixing step 1) obtained feeding injection moulding machine direct injection is shaping makes finished product moulding mixture; Or by step 2) finished pellets extruded sends into injection moulding machine injection molding and make finished product moulding mixture.
6. the preparation technology of a kind of thermoplastic starch material according to claim 5, is characterized in that, at screw rod and the mould mouth spraying Teflon modified coating of described twin screw plasticizing tablets press.
7. the preparation technology of a kind of thermoplastic starch material according to claim 5, is characterized in that, at described mould surface spraying Teflon modified coating.
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| CN201410661635.6A CN104387621A (en) | 2014-11-19 | 2014-11-19 | Thermoplastic starch material and process for preparing same |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105295112A (en) * | 2015-11-19 | 2016-02-03 | 徐致远 | Environment-friendly and degradable sign pen case material based on mung bean starch, production method and application thereof |
| CN106543483A (en) * | 2015-09-18 | 2017-03-29 | 上海东升新材料有限公司 | A kind of preparation method and its product of degradable thermoplastic starch |
| CN106832807A (en) * | 2016-12-29 | 2017-06-13 | 武汉华丽生物股份有限公司 | A kind of controllable full-degradable mulch film of cellulose enhancing starch and preparation method thereof |
| CN109400965A (en) * | 2018-10-30 | 2019-03-01 | 河南工业大学 | A kind of preparation method of lignocellulose for road modified thermoplastic starch |
| CN111690177A (en) * | 2019-03-13 | 2020-09-22 | 北京绿态美景环保科技有限公司 | Preparation method of starch foaming disposable tableware and packaging product |
| EP4074758A1 (en) * | 2020-05-11 | 2022-10-19 | Hope Tree Holding GmbH | Granulate of only natural constitutions; granulate for the manufacture of composable products and method for manufacturing the granulate and the products obtained therefrom |
| CN116041798A (en) * | 2022-12-23 | 2023-05-02 | 海南中之林仿生科技有限公司 | Fiber reinforced thermoplastic starch plate and preparation method thereof |
| CN117089121A (en) * | 2023-08-17 | 2023-11-21 | 佛山市南海区百兴玩具有限公司 | Environment-friendly nontoxic starch plastic for toy |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106543483A (en) * | 2015-09-18 | 2017-03-29 | 上海东升新材料有限公司 | A kind of preparation method and its product of degradable thermoplastic starch |
| CN105295112A (en) * | 2015-11-19 | 2016-02-03 | 徐致远 | Environment-friendly and degradable sign pen case material based on mung bean starch, production method and application thereof |
| CN106832807A (en) * | 2016-12-29 | 2017-06-13 | 武汉华丽生物股份有限公司 | A kind of controllable full-degradable mulch film of cellulose enhancing starch and preparation method thereof |
| CN106832807B (en) * | 2016-12-29 | 2019-12-20 | 武汉华丽生物股份有限公司 | Controllable full-degradable mulching film of cellulose-reinforced starch and preparation method thereof |
| CN109400965A (en) * | 2018-10-30 | 2019-03-01 | 河南工业大学 | A kind of preparation method of lignocellulose for road modified thermoplastic starch |
| CN111690177A (en) * | 2019-03-13 | 2020-09-22 | 北京绿态美景环保科技有限公司 | Preparation method of starch foaming disposable tableware and packaging product |
| EP4074758A1 (en) * | 2020-05-11 | 2022-10-19 | Hope Tree Holding GmbH | Granulate of only natural constitutions; granulate for the manufacture of composable products and method for manufacturing the granulate and the products obtained therefrom |
| CN116041798A (en) * | 2022-12-23 | 2023-05-02 | 海南中之林仿生科技有限公司 | Fiber reinforced thermoplastic starch plate and preparation method thereof |
| CN117089121A (en) * | 2023-08-17 | 2023-11-21 | 佛山市南海区百兴玩具有限公司 | Environment-friendly nontoxic starch plastic for toy |
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Application publication date: 20150304 |