CN100383186C - Dehumidifying agent for plastic shaping and its preparing method - Google Patents
Dehumidifying agent for plastic shaping and its preparing method Download PDFInfo
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- CN100383186C CN100383186C CNB2003101031206A CN200310103120A CN100383186C CN 100383186 C CN100383186 C CN 100383186C CN B2003101031206 A CNB2003101031206 A CN B2003101031206A CN 200310103120 A CN200310103120 A CN 200310103120A CN 100383186 C CN100383186 C CN 100383186C
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- coupling agent
- lubricant
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- humectant
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Abstract
The present invention relates to a dehumidifying agent for plastic shaping processing and a preparation method thereof. The dehumidifying agent comprises solid inorganic oxides, a lubricating agent, a coupling agent, a stabilizing agent and a crosslinking agent. The preparation method comprises the following steps: 1. mixing; 2. extruding and granulating. The dehumidifying agent for plastic shaping processing and the preparation method thereof have the advantages of simple components, simple preparation method and favorable dehumidifying effect. The dehumidifying agent for plastic shaping processing and the preparation method thereof can satisfy requirements for dehumidification in the process of shaping biodegradable plastics produced by using modified starch, and can also greatly popularize a technique for producing the biodegradable plastics by using the modified starch.
Description
Technical field
The present invention relates to a kind of humectant and preparation method thereof that disappears, particularly a kind of humectant and preparation method thereof that disappears that is used for plastic shaping processing.
Background technology
In recent years, use modified starch to produce the main production trend that the bio-degradable plastics goods become global plastics environment protecting enterprise, but in actual production, because starch is the natural polymer of plastics environment protecting industry, all contain three hydroxyls on its each molecule repeating unit, have typical wetting ability, very easily with water molecules, absorb airborne moisture content, and become moist.
Reaction formula:
Thus, when causing using modified starch to produce the bio-degradable plastics goods, in forming process (extrusion moulding, injection moulding or plastics sucking moulding, slush molding etc.) process, there is water vapor bubbles to produce (because these plastic shaping processing temperatures are all being carried out more than 100 ℃, under this temperature, water molecules is all vaporized and is formed bubble), influence the internal performance and the outward appearance of product, cause producing products obtained therefrom performance inconsistency lattice, thereby cause the production technology of using modified starch to produce the bio-degradable plastics goods in application and popularization, to be subjected to bigger restriction.
Summary of the invention
The inventor finds to utilize some solid inorganic oxides to have the feature (as: BaO+H that can generate alkaline matter with water molecule reaction
2O=Ba (OH)
2+ heat, and for example: CaO+H
2O=Ca (OH)
2+ heat), adopting some inorganic oxides is main raw, is aided with other auxiliary agent, thus be formed in can be compatible in the plastic shaping processing with the modified starch biodegradable plastic material.
Purpose of the present invention aims to provide a kind of humectant and preparation method thereof that disappears that is used for plastic shaping processing.
To achieve these goals, concrete technical scheme of the present invention realizes with following scheme:
A kind of humectant that disappears that is used for plastic shaping processing, its composition is counted by weight: 100 parts of solid inorganic oxides, 3～30 parts of lubricants, 1～12 part of coupling agent, 1～15 part of stablizer, 10～100 parts of linking agents.
Described solid inorganic oxide is wherein a kind of of alkalimetal oxides such as MgO, ZnO, CaO, BaO.
Described lubricant is wherein one or both such as liquid paraffin, high boiling point solvent oil, low molecular weight polycaprolactone alkene wax, dioctyl ester.
Described coupling agent is wherein a kind of such as silane coupling agent, aluminate coupling agent, titanate coupling agent.
Described stablizer is wherein one or both such as stearic acid, calcium stearate, sodium stearate, barium stearate, Zinic stearas.
Described linking agent is wherein one or both such as low density polyethylene, linear low density polyethylene LLDPE, ethylene vinyl acetate EVA.
The preparation method who is used for the humectant that disappears of plastic shaping processing of the present invention may further comprise the steps:
1, mix (each component adds by said components content): solid inorganic oxide is placed the height mixing machine, add the part in the lubricant again, open that high to mix switch mixing to machine temperature rise to 80 ℃～95 ℃, stop high mixing, the mixed solution that remainder in the adding lubricant and coupling agent mix, open the low mixing reaction of switch 12～18 minutes that mixes again, or low mix machine temperature rise to 115 ℃～130 ℃, add stablizer, low again mixing took the dish out of the pot after 3～8 minutes, above-mentioned material is promptly placed cold mixer and add linking agent stir and be cooled to 50 ℃～70 ℃ after take the dish out of the pot.
2, extruding pelletization: pour in the same way above-mentioned 1 prepared compound into the extruding pelletization of plasticating in the two deflated twin screw extruders of high length-diameter ratio.The plasticating technology temperature is 80～160 ℃, and main current of electric is 70%～95% of a rated current, and the machine internal pressure is 4～10Mpa, makes the granulated material similar to the plastic cement particle at last.
In the mixed solution that lubricant that adds in the described step (1) and coupling agent mix, the weight ratio of lubricant and coupling agent is 1: 1.
Lubricant (except that low molecular weight polycaprolactone alkene wax) in the mixed solution that mixes with coupling agent that adds refers to liquid lubricant, purpose is that thick coupling agent dissolving is disperseed, being convenient to add equably height stirs and carries out hybrid reaction in the reactor, itself and coupling agent do not have certain proportion, but in order to dissolve coupling agent preferably, and do not influence the melting effect of itself and solid inorganic oxide, the optimum proportion of lubricant and coupling agent is 1: 1.
In the above-mentioned humectant that disappears, because solid inorganic oxide has the feature that can generate alkaline matter with water molecule reaction, again because the adding of lubricant, coupling agent, stablizer, four kinds of auxiliary agents of linking agent, make that the described humectant that disappears can be with compatible by the bio-degradable plastics of modified starch preparation, so, the above-mentioned humectant that disappears can absorb moisture content contained in the modified starch fully, reaches the wet purpose that disappears.
The component of the humectant that disappears that is used for plastic shaping processing provided by the present invention is simple, the preparation method is simple, and resulting product can find out also that by the contrast experiment disappearing of the humectant that disappears that is used for plastic shaping processing provided by the present invention is wet effective, can satisfy and use modified starch to produce bio-degradable plastics requirement to dehumidifying in molding process, make every physicals of final bio-degradable plastics goods all be up to state standards, promoted the use modified starch thus dramatically and produced the bio-degradable plastics The Application of Technology.
Embodiment
Below will describe implementation process of the present invention in detail in the mode of embodiment.
Embodiment 1:
(1) gets 250kgMgO and place 500 type high mixers, add the 15kg liquid paraffin, open that high to mix switch mixing to machine temperature rise to 80 ℃～85 ℃, stop high mixing, add the mixed solution that mixes with 3kg liquid paraffin and 3kg aluminate coupling agent, open the low mixing reaction of switch 15～18 minutes that mixes again, or mix machine temperature rise to 115 ℃～120 ℃, add 4kg sodium stearate stablizer, low again mixing took the dish out of the pot after 4～6 minutes, above-mentioned material is promptly placed cold mixer and add 75kgLDPE stir and be cooled to 60 ℃～65 ℃ after take the dish out of the pot.
(2) above-mentioned compound is poured into the KS-75 type extruding pelletization of plasticating in the two deflated twin screw extruders of high length-diameter ratio in the same way.The plasticating technology temperature is: one group 130 ℃, two groups 130 ℃, three groups 135 ℃, four groups 140 ℃, five groups 145 ℃, six groups 145 ℃, seven groups 150 ℃, eight groups 140 ℃, nine groups 135 ℃, ten groups 130 ℃.200 rev/mins of engine speeds, electric current 150A, pressure 7.8MPa makes the granulated material similar to the plastic cement particle at last.
Embodiment 2:
(1) gets 250kgCaO and place 500 type high mixers, add the 22.5kg liquid paraffin, open that high to mix switch mixing to machine temperature rise to 90 ℃～95 ℃, stop high mixing, add the mixed solution that mixes with 2.5kg liquid paraffin and 2.5kg titanate coupling agent, open the low mixing reaction of switch 12～15 minutes that mixes again, or mix machine temperature rise to 115 ℃～120 ℃, add 4kg stearic acid stablizer, low again mixing took the dish out of the pot after 5～6 minutes, above-mentioned material is promptly placed cold mixer and add 40kgLDPE stir and be cooled to 65 ℃～70 ℃ after take the dish out of the pot.
(2) above-mentioned compound is poured into the KS-75 type extruding pelletization of plasticating in the two deflated twin screw extruders of high length-diameter ratio in the same way.The plasticating technology temperature is: one group 115 ℃, two groups 120 ℃, three groups 125 ℃, four groups 125 ℃, five groups 125 ℃, six groups 125 ℃, seven groups 130 ℃, eight groups 120 ℃, nine groups 115 ℃, ten groups 115 ℃.200 rev/mins of engine speeds, electric current 145A, pressure 5.9MPa makes the granulated material similar to the plastic cement particle at last.
Embodiment 3:
(1) gets 200kgC aO and place 500 type high mixers, add the 12kg liquid paraffin, open that high to mix switch mixing to machine temperature rise to 90 ℃～95 ℃, stop high mixing, add the mixed solution that mixes with 3kg high boiling point solvent oil and 3kg aluminate coupling agent, open again and low mix that switch is mixing to be reacted to machine temperature rise to 118 ℃, add 3kg stearic acid stablizer, low again mixing took the dish out of the pot after 5 minutes, above-mentioned material is promptly placed cold mixer and adds 10kg LDPE and 10kg LLDPE, stir and be cooled to 63 ℃ after take the dish out of the pot.
(2) above-mentioned compound is poured into the KS-75 type extruding pelletization of plasticating in the two deflated twin screw extruders of high length-diameter ratio in the same way.The plasticating technology temperature is: one group 135 ℃, two groups 140 ℃, three groups 145 ℃, four groups 150 ℃, five groups 155 ℃, six groups 155 ℃, seven groups 160 ℃, eight groups 150 ℃, nine groups 145 ℃, ten groups 145 ℃.350 rev/mins of engine speeds, electric current 160A, pressure 8.2MPa makes the granulated material similar to the plastic cement particle at last.
Embodiment 4:
(1) gets 200kgCaO and place 500 type high mixers, add 26kg low molecular weight polycaprolactone alkene wax, open that high to mix switch mixing to machine temperature rise to 88 ℃, stop high mixing, add the mixed solution that mixes with 4kg dioctyl ester and 4kg titanate coupling agent, open the low mixing reaction of switch 17 minutes that mixes again, add 5kg stearic acid stablizer, low again mixing took the dish out of the pot after 5 minutes, and above-mentioned material is promptly placed cold mixer and adds 5kg LDPE and 15kgEVA, stir and be cooled to 70 ℃ after take the dish out of the pot.
(2) above-mentioned compound is poured into the KS-75 type extruding pelletization of plasticating in the two deflated twin screw extruders of high length-diameter ratio in the same way.The plasticating technology temperature is: one group 110 ℃, two groups 115 ℃, three groups 120 ℃, four groups 120 ℃, five groups 120 ℃, six groups 120 ℃, seven groups 125 ℃, eight groups 120 ℃, nine groups 115 ℃, ten groups 110 ℃.300 rev/mins of engine speeds, electric current 155A, pressure 6.5MPa makes the granulated material similar to the plastic cement particle at last.
Embodiment 5:
(1) gets 200kgCaO and place 500 type high mixers, it is cured to add the 36kg low molecular polyethylene, open that high to mix switch mixing to machine temperature rise to 88 ℃, stop high mixing, add the mixed solution that mixes with 24kg liquid paraffin and 24kg aluminate coupling agent, open the low mixing reaction of switch 15 minutes that mixes again, add 15kg stearic acid, 15kg calcium stearate stablizer, low again mixing took the dish out of the pot after 5 minutes, above-mentioned material is promptly placed cold mixer and add 200kgLDPE stir and be cooled to 60 ℃ after take the dish out of the pot.
(2) above-mentioned compound is poured into the KS-75 type extruding pelletization of plasticating in the two deflated twin screw extruders of high length-diameter ratio in the same way.The plasticating technology temperature is: one group 80 ℃, two groups 90 ℃, three groups 100 ℃, four groups 110 ℃, five groups 110 ℃, six groups 110 ℃, seven groups 115 ℃, eight groups 110 ℃, nine groups 105 ℃, ten groups 100 ℃.300 rev/mins of engine speeds, electric current 142A, pressure 4.7MPa makes the granulated material similar to the plastic cement particle at last.
In addition, in order to prove beneficial effect of the present invention, the inventor also has been following contrast experiment, and its process is described in detail as follows:
Get the biodegradable master batch 30kg that contains 50% pure starch, high density polyethylene 53kg, LLDPE15kg, the humectant 2kg that disappears of the present invention.Above compound places SJ-50 type inflation film manufacturing machine, extrudes under 130 ℃～160 ℃ of temperature and blows out wide 250mm, the starch based biological degradation freshness protection package film of thick 0.008mm.No bubble is observed in resulting product freshness protection package film inflation back, and physicals meets national standard through the whole indexs of tensile test machine testing, and is suitable with the performance of the articles of biodegradable plastics material of the moisture absorption of not made moist in the course of processing.
And moisture absorption in wet condition but do not have to add the product of humectant of disappearing in the course of processing, its whole face is bubble entirely, and the physicals extreme difference can't detect, and product does not meet the standard of national requirements fully.
The humectant that disappears of the present invention specifically detects data and sees the following form 1:
Table 1
| Project | Embodiment one | Embodiment two | Embodiment three | Embodiment four | Embodiment five |
| Moisture absorption ratio | 21.3％ | 20.5％ | 22.1％ | 20.8％ | 20.1％ |
| Melting index | 6.9g | 6.7g | 5.8g | 6.5g | 7.3g |
| Volatile content | 3.2％ | 2.5％ | 2.8％ | 2.9％ | 3.6％ |
In addition: get the biodegradable master batch 30kg that contains 50% pure starch respectively, HDPE53kg, LLDPE15kg, the embodiment of the invention 1-5 humectant 2kg that disappears.Above compound places SJ-50 type inflation film manufacturing machine, and under 130 ℃～160 ℃ of temperature, extrude and blow out wide 400mm, the starch based biological degradation shopping bag film of thick 0.025mm, its physicals sees Table 2:(by GB/T4456-1996)
Table 2
| Project | Embodiment one | Embodiment two | Embodiment three | Embodiment four | Embodiment five |
| Tensile strength (standard 〉=10Mpa) | 33.2MPa | 35.8MPa | 34.1MPa | 31.6MPa | 29.7MPa |
| Elongation at break (standard 〉=130%) | 420％ | 518％ | 532％ | 614％ | 498％ |
Claims (5)
1. one kind is used for the humectant that disappears that plastic shaping is processed, its composition is counted by weight: 100 parts of solid inorganic oxides, 3～30 parts of lubricants, 1～12 part of coupling agent, 1～15 part of stablizer, 10～100 parts of linking agents, wherein solid inorganic oxide is MgO, ZnO, CaO, a kind of in the BaO alkalimetal oxide, lubricant is a liquid paraffin, high boiling point solvent oil, low molecular weight polycaprolactone alkene wax, in the dioctyl ester one or both, stablizer is a stearic acid, calcium stearate, sodium stearate, barium stearate, in the Zinic stearas one or both, linking agent are low density polyethylene, linear low density polyethylene LLDPE, among the ethylene vinyl acetate EVA one or both.
2. the humectant that disappears according to claim 1, wherein coupling agent is a kind of in silane coupling agent, aluminate coupling agent, the titanate coupling agent.
3. the preparation method of the humectant that disappears according to claim 1 may further comprise the steps:
(1) mixes: solid inorganic oxide 100 weight parts are placed the height mixing machine, add the part in the lubricant of 3～30 weight parts again, open that high to mix switch mixing to machine temperature rise to 80 ℃～95 ℃, stop high mixing, the mixed solution that remainder in the lubricant of adding 3～30 weight parts and coupling agent mix, the weight part of coupling agent is 1～12 part, open the low mixing reaction of switch 12～18 minutes that mixes again, or low mix machine temperature rise to 115 ℃～130 ℃, add stablizer 1～15 weight part, low again mixing took the dish out of the pot after 3～8 minutes, above-mentioned material is promptly placed cold mixer and add linking agent 10～100 weight parts stir and be cooled to 50 ℃～70 ℃ after take the dish out of the pot;
(2) extruding pelletization: pour in the same way above-mentioned 1 prepared compound into the extruding pelletization of plasticating in the two deflated twin screw extruders of high length-diameter ratio, the plasticating technology temperature is 80～160 ℃, main current of electric is 70%～95% of a rated current, the machine internal pressure is 4～10Mpa, makes the granulated material similar to the plastic cement particle at last.
4. the preparation method of the humectant that disappears according to claim 3, wherein in the mixed solution that remainder in the lubricant of 3～30 weight parts that add in step (1) and coupling agent mix, the weight ratio of lubricant and coupling agent is 1: 1.
5. the preparation method of the humectant that disappears according to claim 3, wherein in the mixed solution that remainder in the lubricant of 3～30 weight parts that add in step (1) and coupling agent mix, lubricant refers to liquid lubricant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101031206A CN100383186C (en) | 2003-10-31 | 2003-10-31 | Dehumidifying agent for plastic shaping and its preparing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101031206A CN100383186C (en) | 2003-10-31 | 2003-10-31 | Dehumidifying agent for plastic shaping and its preparing method |
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|---|---|
| CN1611534A CN1611534A (en) | 2005-05-04 |
| CN100383186C true CN100383186C (en) | 2008-04-23 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102311570A (en) * | 2011-08-05 | 2012-01-11 | 大连方盛塑料有限公司 | Dehumidizer for plastic molding |
| CN103627060B (en) * | 2012-08-21 | 2018-05-22 | 上海心尔新材料科技股份有限公司 | Plastic processing long-acting defoaming dehumidifying masterbatch and preparation method thereof |
| CN108017828A (en) * | 2016-10-28 | 2018-05-11 | 成都盛达仁科技有限公司 | A kind of preparation method of plastics deicer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1136050A (en) * | 1996-02-06 | 1996-11-20 | 雷鸣 | Decompositable material for package and method for producing food container |
| JP2000273193A (en) * | 1999-03-26 | 2000-10-03 | Sumitomo Chem Co Ltd | Production of thermoplastic resin molding |
| CN1403496A (en) * | 2002-10-28 | 2003-03-19 | 汕头市奇佳机械厂有限公司 | Completely degradable paper-like material with starch as basic material and its prepn |
-
2003
- 2003-10-31 CN CNB2003101031206A patent/CN100383186C/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1136050A (en) * | 1996-02-06 | 1996-11-20 | 雷鸣 | Decompositable material for package and method for producing food container |
| JP2000273193A (en) * | 1999-03-26 | 2000-10-03 | Sumitomo Chem Co Ltd | Production of thermoplastic resin molding |
| CN1403496A (en) * | 2002-10-28 | 2003-03-19 | 汕头市奇佳机械厂有限公司 | Completely degradable paper-like material with starch as basic material and its prepn |
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| CN1611534A (en) | 2005-05-04 |
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Assignee: Fujian Pan Asia science and Technology Development Co., Ltd. Assignor: Ding Shaozhong Contract fulfillment period: 2009.6.20 to 2022.1.30 contract change Contract record no.: 2009350000144 Denomination of invention: Dehumidifying agent for plastic shaping and its preparing method Granted publication date: 20080423 License type: Exclusive license Record date: 2009.7.23 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.6.20 TO 2022.1.30; CHANGE OF CONTRACT Name of requester: FUJIAN FAYA SCIENCE AND TECHNOLOGY DEVELOPMENT CO. Effective date: 20090723 |