CN105086356A - Modified urea formaldehyde molding compound and preparation method thereof - Google Patents
Modified urea formaldehyde molding compound and preparation method thereof Download PDFInfo
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- CN105086356A CN105086356A CN201410217898.8A CN201410217898A CN105086356A CN 105086356 A CN105086356 A CN 105086356A CN 201410217898 A CN201410217898 A CN 201410217898A CN 105086356 A CN105086356 A CN 105086356A
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Abstract
The invention relates to the technical field of modified polymers, specifically to a modified urea formaldehyde molding compound. The modified urea formaldehyde molding compound comprises, by weight, 70 to 90% of a urea formaldehyde molding compound and 10 to 30% of a melamine formaldehyde molding compound. The preparation method comprises the following steps: 1) preparing the urea formaldehyde molding compound; 2) preparing the melamine formaldehyde molding compound; 3) mixing the two powdery molding compounds according to a certain proportion; and 4) carrying out granulation, sieving, separating and packaging so as to obtain a finished product. Compared with the prior art, the invention has the following advantages: the modified urea formaldehyde molding compound does not crack and deform when continuously heated at 150 DEG C for 168 h and can maintain appearance of the original molding compounds, dimensional stability and other mechanical properties; and the method is simple and practical and is applicable to large-scale industrial production.
Description
Technical field
The present invention relates to polymer-modified technical field, particularly, relates to a kind of modified urea-formaldehyde resin moulding compound and preparation method thereof.
Background technology
Melamine formaldehyde molding compound is by based on terpolycyantoamino-formaldehyde resin, add filler, releasing agent, pigment, solidifying agent and releasing agent, and adopt certain technique to make, it is bright in luster, smooth in appearance, odorless, tasteless, have higher heat-drawn wire, fire-retardant, certainly put out, the advantage such as resistance to electric arc, product size are stable and water-fast, be thus widely used in electronics, electrical equipment, automobile and daily apparatus.
But when using conventional urea-formaldehyde resin moulding compound processing low-voltage apparatus connector, the temperature of usual processing is more than 180 DEG C, process for a long time under the condition of this high temperature, conventional urea moulding material there will be the phenomenons such as cracking, distortion, reduce the working (machining) efficiency of low-voltage apparatus connector, produce a large amount of substandard product.
Therefore, be badly in need of providing a kind of modified urea-formaldehyde resin moulding compound and preparation method thereof, to solve the deficiencies in the prior art.
Summary of the invention
The object of the invention is to provide a kind of modified urea-formaldehyde moulding compound and preparation method thereof, urea moulding material thermotolerance through modification is more excellent, can at 145 DEG C laser heating within 168 hours, do not ftracture, indeformable, keep certainly putting out and the advantage such as dimensional stabilizing of itself simultaneously, the needs of processing low-voltage apparatus connector can be met.
The present invention is achieved by the following technical solutions:
A kind of modified urea-formaldehyde moulding compound, comprises the various components of following weight percent:
Urea moulding material 70-90%;
Melamine formaldehyde molding compound 10-30%.
Described urea moulding material comprises the various components of following weight percent:
Urea-formaldehyde resin 45-55%;
Wood pulp 30-35%;
Mineral filler 1-5%;
Pigment 1-5%;
Solidifying agent 0.5-2%;
Softening agent 2-8%;
Releasing agent 0.5-3%.
The preparation method of described urea-formaldehyde resin is as follows:
1) be that 1.5:1 takes formaldehyde and urea respectively by the mol ratio of formaldehyde and urea, the formaldehyde of above-mentioned amount is dropped in reactor, start stirring arm, the aqueous sodium hydroxide solution dropping into 10% regulates PH≤7.5, then drops into the urea of above-mentioned amount, Temperature fall under the condition stirred, open steam valve when temperature no longer declines, in reacting kettle jacketing, pass into 0.1MPa steam heating, along with temperature of charge rises, reaction solution is tending towards clarification by oyster white, and namely urea dissolves completely;
2) when material temperature rises to 30 DEG C, progressively steam off, until complete steam off stops heating when material temperature rises to 35 DEG C, material progressively rises due to addition condensation reason material temperature, judges whether to need to add steam when material temperature rises to 40 DEG C according to the bent curvature of a curve trend of moisture recorder;
3) rise to 60 DEG C along with temperature, the reaction times is 60 minutes, namely to reaction end, obtains described urea-formaldehyde resin.
Described melamine formaldehyde molding compound comprises the various components of following weight hundred ratio:
Terpolycyantoamino-formaldehyde resin 50-55%;
Wood pulp 30-35%;
Mineral filler 1-3%;
Pigment 1-3%;
Solidifying agent 1-5%;
Softening agent 2-4%;
Releasing agent 0.5-1.5%.
The preparation method of described melamine formaldehyde molding compound is as follows:
1) be that 1.75:1 takes formaldehyde and trimeric cyanamide respectively by the mol ratio of formaldehyde and trimeric cyanamide, the formaldehyde of described amount dropped in reactor, start stirring arm, then with 10% aqueous sodium hydroxide solution adjustment pH value to 5.0-5.2, then use NH
4oH regulator solution pH value, to 8.2-8.5, then drops into the trimeric cyanamide of described amount;
2) with the above-mentioned material of the steam heating of 0.08MPa pressure, control heat-up rate, be heated to 65 DEG C half an hour, turn down steam valve, keep the heating of 0.05MPa pressure, material temperature is made to rise to 70 DEG C of i.e. steam offs, steam discharging in chuck, temperature of charge slowly rises to 78-80 DEG C, and then solution maintains 20 minutes at 80 ± 1 DEG C, observe material and transfer clarification to by oyster white, obtain terpolycyantoamino-formaldehyde resin;
3) add the terpolycyantoamino-formaldehyde resin of step 2 gained in kneader after, drop into the wood pulp of formula ratio, pigment, mineral filler, solidifying agent, releasing agent again, unlatching steam jacket heats, carry out vacuum kneading dehydration, control temperature of charge at 55-65 DEG C, 45 minutes heat-up times, then steam off, discharging after temperature of charge is down to 40 DEG C;
4) step 3 gained material is delivered to moisture eliminator and carry out drying, its hot blast temperature controls each joint at 85-95 DEG C, 150 minutes heat-up times, obtain moisture lower than 3% dried granules;
5) by step 4 gained dried granules through pulverizing, ball milling and sieve powder, obtain evenly and there is the melamino-formaldehyde molding of certain fineness.
Described mineral filler is selected from any one or a few the composition in silicon powder, talcum powder or glass microballon, and described talcous fineness is particle diameter≤20 μm of 800-1000 order, described glass microballon.
Described softening agent is selected from the composition of any one or both in glucoside or ACR, described softening agent is selected from the composition of any one or both in glucoside or ACR, wherein ACR is acrylate (acrylicester) multipolymer, belong to " core-shell structure copolymer " structure copolymer, commercially availablely common are ACR-201, ACR-301 and ACR-401 etc., during use, only need add less number can obtain higher normal temperature and low temperature impact strength, improves the temperature range of processing.
Described solidifying agent is selected from any one or several compositions in SE, GW, SH and UP, SE is thionamic acid fatty acid ester, GW is urea formaldehyde resin curing agent, commercially available has GW-2, GW-4, SH is epoxy resin high temperature roughening and curing agent, commercially available has SH-1, and UP is unsaturated polyester resin solidifying agent, is preferably UP.
Described releasing agent is selected from Zinic stearas or calcium stearate.
The preparation method of described modified urea-formaldehyde moulding compound, comprises the following steps:
1) by formula ratio, the urea-formaldehyde resin prepared is added in kneader, then the wood pulp described in formula ratio, mineral filler, pigment, solidifying agent and releasing agent is added, vacuum hydro-extraction under jacket steam heating, temperature controls at 50-65 DEG C, heat-up time is 1 hour, then steam off, material is cooled to less than 50 DEG C, obtains urea moulding material slurry;
2) by described in step 1) urea moulding material slurry send into moisture eliminator, control each joint hot blast temperature at 80-95 DEG C, the time is 150 minutes, and final section is cooled to less than 35 DEG C, obtain water content lower than 3% urea moulding material;
3) by step 2) urea moulding material of gained pulverizes by the weight ratio of formula and enters ball mill ball milling 3 hours, then drop into by the weight ratio of formula the melamine formaldehyde molding compound prepared, ball milling discharging separation after 3 hours more together, fine powder becomes work in-process, meal is shared equally into later ball milling after concentrating ball milling again;
4) moulding compound mixed through step 3) is dropped into granulation in tablets press, be then packaged as finished product through the particulate modified molybdenum urea moulding material sieving grain, separation obtains certain particle size scope, fine powder returns ball milling and carries out recycle.
Compared with prior art, a kind of modified urea-formaldehyde moulding compound provided by the invention and preparation method thereof, employ urea-formaldehyde resin, terpolycyantoamino-formaldehyde resin and heat-resisting mineral filler improve the thermotolerance of urea-formaldehyde resin, the mineral filler of selecting is dystectic white powder and solid glass micro-bead, there is higher whiteness, the coefficient of expansion is low, acid number is slightly biased in weakly alkaline, by process and resin crosslinks, because trimeric cyanamide and formaldehyde reaction generate terpolycyantoamino-formaldehyde resin, in thermotolerance, water tolerance is all better than urea-formaldehyde resin, and effectively reduce formaldehyde residual in urea-formaldehyde resin, contained free aldehyde in obvious reduction modified urea-formaldehyde moulding compound, improve the envrionment conditions of post-treatment, therefore, urea-formaldehyde resin through above-mentioned modification has excellent thermotolerance, heating in continuous 168 hours can not ftracture at 150 DEG C, indeformable, the outward appearance of original plastics can not only be kept and keep the stability of size and other model-performance, preparation method is simple and practical, be applicable to large-scale industrial production.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, understands the present invention to help those skilled in the art.
Embodiment 1
A kind of modified urea-formaldehyde resin moulding compound, comprises the various components of following weight percent:
Urea moulding material 90%;
Melamine formaldehyde molding compound 10%.
Wherein, described urea moulding material comprises the various components of following weight percent:
Urea-formaldehyde resin 55%;
Wood pulp 33.3%;
Mineral filler 2.05%;
Pigment 3%;
Solidifying agent 0.85%;
Softening agent 4.8%;
Releasing agent 1%.
Described melamine formaldehyde molding compound comprises the various components of following weight percent:
Terpolycyantoamino-formaldehyde resin 53%;
Wood pulp 33%;
Mineral filler 3%;
Pigment 1%;
Solidifying agent 5%;
Softening agent 4%;
Releasing agent 1%.
Wherein, mineral filler is 800 object talcum powder, and solidifying agent is the composition of SE, GW-2 and UP, and softening agent is glucoside, and releasing agent is Zinic stearas.
Embodiment 2
A kind of modified urea-formaldehyde resin moulding compound, comprises the various components of following weight percent:
Urea moulding material 85%;
Melamine formaldehyde molding compound 15%.
Wherein, described urea moulding material comprises the various components of following weight percent:
Urea-formaldehyde resin 52.5%;
Wood pulp 34%;
Mineral filler 5%;
Pigment 3%;
Solidifying agent 0.5%;
Softening agent 2%;
Releasing agent 3%.
Described melamine formaldehyde molding compound comprises the various components of following weight percent:
Terpolycyantoamino-formaldehyde resin 55%;
Wood pulp 30%;
Mineral filler 3%;
Pigment 2%;
Solidifying agent 5%;
Softening agent 4%;
Releasing agent 1%.
Wherein, mineral filler is 1000 object talcum powder, and solidifying agent is the composition of SE, GW-4 and UP, and softening agent is glucoside, and releasing agent is Zinic stearas.
Embodiment 3
A kind of modified urea-formaldehyde resin moulding compound, comprises the various components of following weight percent:
Urea moulding material 80%;
Melamine formaldehyde molding compound 20%.
Wherein, described urea moulding material comprises the various components of following weight percent:
Urea-formaldehyde resin 50%;
Wood pulp 35%;
Mineral filler 1%;
Pigment 3%;
Solidifying agent 5%;
Softening agent 3%;
Releasing agent 3%.
Described melamine formaldehyde molding compound comprises the various components of following weight percent:
Terpolycyantoamino-formaldehyde resin 50%;
Wood pulp 35%;
Mineral filler 1%;
Pigment 2%;
Solidifying agent 5%;
Softening agent 4%;
Releasing agent 1%.
Wherein, mineral filler is silicon powder, and solidifying agent is unsaturated polyester resin solidifying agent UP, and softening agent is ACR-201, and releasing agent is calcium stearate.
Embodiment 4
A kind of modified urea-formaldehyde resin moulding compound, comprises the various components of following weight percent:
Urea moulding material 75%;
Melamine formaldehyde molding compound 25%.
Wherein, described urea moulding material comprises the various components of following weight percent:
Urea-formaldehyde resin 55%;
Wood pulp 35%;
Mineral filler 1%;
Pigment 4%;
Solidifying agent 1.5%;
Softening agent 7%;
Releasing agent 1.5%.
Described melamine formaldehyde molding compound comprises the various components of following weight percent:
Terpolycyantoamino-formaldehyde resin 55%;
Wood pulp 35%;
Mineral filler 3%;
Pigment 1%;
Solidifying agent 3.5%;
Softening agent 2%;
Releasing agent 0.5%.
Wherein, mineral filler is that particle diameter is less than the≤glass microballon of 20um, and solidifying agent is the composition of SE, GW-4 and SH-1, and softening agent is ACR-401, and releasing agent is Zinic stearas.
Embodiment 5
A kind of modified urea-formaldehyde resin moulding compound, comprises the various components of following weight percent:
Urea moulding material 70%;
Melamine formaldehyde molding compound 30%.
Wherein, described urea moulding material comprises the various components of following weight percent:
Urea-formaldehyde resin 48%;
Wood pulp 34%;
Mineral filler 5%;
Pigment 3%;
Solidifying agent 0.5%;
Softening agent 8%;
Releasing agent 0.5%.
Described melamine formaldehyde molding compound comprises the various components of following weight percent:
Terpolycyantoamino-formaldehyde resin 55%;
Wood pulp 35%;
Mineral filler 3%;
Pigment 3%;
Solidifying agent 1%;
Softening agent 2.5%;
Releasing agent 0.5%.
Wherein, mineral filler is 900 object talcum powder, and solidifying agent is the composition of GW-4 and SH-1, and softening agent is ACR-301, and releasing agent is Zinic stearas.
Embodiment 6
The preparation method of the urea-formaldehyde resin described in embodiment 1-5, comprises the following steps:
1) 1800g (22.2mol) formaldehyde and 888g (14.8mol) urea is taken respectively, the formaldehyde of above-mentioned amount is dropped in reactor, start stirring arm, the aqueous sodium hydroxide solution dropping into 10% is adjusted to PH≤7.5, then the urea of above-mentioned amount is dropped into, Temperature fall under the condition stirred, steam valve is opened when temperature no longer declines, 0.1MPa steam heating is passed in reacting kettle jacketing, along with temperature of charge rises, reaction solution is tending towards clarification by oyster white, and namely urea dissolves completely;
2) when material temperature rises to 30 DEG C, progressively steam off, until complete steam off stops heating when material temperature rises to 35 DEG C, material progressively rises due to addition condensation reason material temperature, judges whether to need to add steam when material temperature rises to 40 DEG C according to the bent curvature of a curve trend of moisture recorder;
3) rise to 60 DEG C along with temperature, the reaction times is 60 minutes, namely to reaction end, obtains described modified urea-formaldehyde resin.
The preparation method of the melamine formaldehyde molding compound described in embodiment 1-5, comprises the following steps:
1) take 1946g (24mol) formaldehyde and 1728g (13.7mol) trimeric cyanamide respectively, the formaldehyde of above-mentioned amount is dropped in reactor, start stirring arm, then regulate pH value to 5.0-5.2 with the sodium hydroxide solution of 10%, then use NH
4oH regulator solution pH value, to 8.2-8.5, then drops into the trimeric cyanamide of above-mentioned amount;
2) with the above-mentioned material of the steam heating of 0.08MPa pressure, control heat-up rate, be heated to 65 DEG C half an hour, turn down steam valve, keep the heating of 0.05MPa pressure, material temperature is made to rise to 70 DEG C of i.e. steam offs, steam discharging in chuck, temperature of charge slowly rises to 78-80 DEG C, and then solution maintains 20 minutes at 80 ± 1 DEG C, observe material and transfer clarification to by oyster white, obtain terpolycyantoamino-formaldehyde resin;
3) in kneader, step 2 is added) after the terpolycyantoamino-formaldehyde resin of gained, drop into the wood pulp of formula ratio, pigment, mineral filler, solidifying agent, releasing agent again, unlatching steam jacket heats, carry out vacuum kneading dehydration, control temperature of charge at 55-65 DEG C, 45 minutes heat-up times, then steam off, discharging after temperature of charge is down to 40 DEG C;
4) step 3) gained material is delivered to moisture eliminator and carry out drying, its hot blast temperature controls each joint at 85-95 DEG C, 150 minutes heat-up times, obtain moisture lower than 3% dried granules;
5) by step 4) gained dried granules through pulverizing, ball milling and sieve powder, obtain evenly and there is the melamino-formaldehyde molding of certain fineness.
The preparation method of the modified urea-formaldehyde moulding compound described in embodiment 1-5, comprises the following steps:
1) by formula ratio, the urea-formaldehyde resin prepared is added in kneader, then the wood pulp described in formula ratio, mineral filler, pigment, solidifying agent and releasing agent is added, vacuum hydro-extraction under jacket steam heating, temperature controls at 50-65 DEG C, heat-up time is 1 hour, then steam off, material is cooled to less than 50 DEG C, obtains urea moulding material;
2) by described in step 1 urea moulding material slurry send into moisture eliminator, control each joint hot blast temperature at 80-95 DEG C, the time is 150 minutes, and final section is cooled to less than 35 DEG C, obtain water content lower than 3% powdery urea moulding material slurry;
3) urea moulding material of step 3 gained is entered ball mill ball milling 3 hours by the weight ratio pulverizing of formula, then drop into by the weight ratio of formula the melamine formaldehyde molding compound prepared, ball milling discharging separation after 3 hours more together, fine powder becomes work in-process, meal is shared equally into later ball milling after concentrating ball milling again;
4) moulding compound mixed through step 3 is dropped into granulation in tablets press, be then packaged as finished product through the particulate modified molybdenum urea moulding material sieving grain, separation obtains certain particle size scope, fine powder returns ball milling and carries out recycle.
The modified urea-formaldehyde resin moulding compound of embodiment 1-5 gained is carried out thermotolerance test, and result is as follows:
| Test subject | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 |
| 160 DEG C of baking ovens toast 168 hours continuously | Non-foaming, indeformable | Do not ftracture, indeformable | Do not ftracture, non-foaming | Do not ftracture non-foaming indeformable | Do not ftracture non-foaming indeformable |
| Flexural strength (MPa) | 97 | 96 | 99 | 98 | 97 |
| Insulation resistance Ω | ≥1x1012 | ≥1x1012 | ≥1x1012 | ≥1x1012 | ≥1x1012 |
Above-described embodiment, just preferred embodiment of the present invention, is not used for limiting practical range of the present invention, therefore all equivalences done with the feature described in the claims in the present invention and principle change or modify, and all should be included within the claims in the present invention scope.
Claims (10)
1. a modified urea-formaldehyde moulding compound, is characterized in that, comprises the various components of following weight percent:
Urea moulding material 70-90%;
Melamine formaldehyde molding compound 10-30%.
2. modified urea-formaldehyde moulding compound as claimed in claim 1, it is characterized in that, described urea moulding material comprises the various components of following weight percent:
Urea-formaldehyde resin 45-55%;
Wood pulp 30-35%;
Mineral filler 1-5%;
Pigment 1-5%;
Solidifying agent 0.5-2%;
Softening agent 2-8%;
Releasing agent 0.5-3%.
3. urea moulding material as claimed in claim 2, it is characterized in that, the preparation method of described urea-formaldehyde resin is as follows:
1) be that 1.5:1 takes formaldehyde and urea respectively by the mol ratio of formaldehyde and urea, the formaldehyde of above-mentioned amount is dropped in reactor, start stirring arm, the aqueous sodium hydroxide solution dropping into 10% regulates PH≤7.5, then drops into the urea of above-mentioned amount, Temperature fall under the condition stirred, open steam valve when temperature no longer declines, in reacting kettle jacketing, pass into 0.1MPa steam heating, along with temperature of charge rises, reaction solution is tending towards clarification by oyster white, and namely urea dissolves completely;
2) when material temperature rises to 30 DEG C, progressively steam off, until complete steam off stops heating when material temperature rises to 35 DEG C, material progressively rises due to addition condensation reason material temperature, judges whether to need to add steam when material temperature rises to 40 DEG C according to the bent curvature of a curve trend of moisture recorder;
3) rise to 60 DEG C along with temperature, the reaction times is 60 minutes, namely to reaction end, obtains described urea-formaldehyde resin.
4. modified urea-formaldehyde moulding compound as claimed in claim 1, it is characterized in that, described melamine formaldehyde molding compound comprises the various components of following weight hundred ratio:
Terpolycyantoamino-formaldehyde resin 50-55%;
Wood pulp 30-35%;
Mineral filler 1-3%;
Pigment 1-3%;
Solidifying agent 1-5%;
Softening agent 2-4%;
Releasing agent 0.5-1.5%.
5. modified urea-formaldehyde moulding compound as claimed in claim 4, is characterized in that: the preparation method of described melamine formaldehyde molding compound is as follows:
1) be that 1.75:1 takes formaldehyde and trimeric cyanamide respectively by the mol ratio of formaldehyde and trimeric cyanamide, the formaldehyde of described amount dropped in reactor, start stirring arm, then with 10% aqueous sodium hydroxide solution adjustment pH value to 5.0-5.2, then use NH
4oH regulator solution pH value, to 8.2-8.5, then drops into the trimeric cyanamide of described amount;
2) with the above-mentioned material of the steam heating of 0.08MPa pressure, control heat-up rate, be heated to 65 DEG C half an hour, turn down steam valve, keep the heating of 0.05MPa pressure, material temperature is made to rise to 70 DEG C of i.e. steam offs, steam discharging in chuck, temperature of charge slowly rises to 78-80 DEG C, and then solution maintains 20 minutes at 80 ± 1 DEG C, observe material and transfer clarification to by oyster white, obtain terpolycyantoamino-formaldehyde resin;
3) in kneader, step 2 is added) after the terpolycyantoamino-formaldehyde resin of gained, drop into the wood pulp of formula ratio, pigment, mineral filler, solidifying agent, releasing agent again, unlatching steam jacket heats, carry out vacuum kneading dehydration, control temperature of charge at 55-65 DEG C, 45 minutes heat-up times, then steam off, discharging after temperature of charge is down to 40 DEG C;
4) step 3) gained material is delivered to moisture eliminator and carry out drying, its hot blast temperature controls each joint at 85-95 DEG C, 150 minutes heat-up times, obtain moisture lower than 3% dried granules;
5) by step 4) gained dried granules through pulverizing, ball milling and sieve powder, obtain evenly and there is the melamino-formaldehyde molding of certain fineness.
6. the modified urea-formaldehyde moulding compound as described in any one of claim 2-5, it is characterized in that: described mineral filler is selected from any one or a few the composition in silicon powder, talcum powder or glass microballon, described talcous fineness is particle diameter≤20 μm of 800-1000 order, described glass microballon.
7. the modified urea-formaldehyde moulding compound as described in any one of claim 2-5, is characterized in that: described softening agent is selected from the composition of any one or both in glucoside or ACR.
8. the modified urea-formaldehyde moulding compound as described in any one of claim 2-5, is characterized in that: described solidifying agent is selected from any one or several compositions in SE, GW, SH and UP.
9. the modified urea-formaldehyde moulding compound as described in any one of claim 2-5, is characterized in that: described releasing agent is selected from Zinic stearas or calcium stearate.
10. the preparation method of the modified urea-formaldehyde moulding compound as described in any one of claim 2-5, is characterized in that, comprise the following steps:
1) by formula ratio, the urea-formaldehyde resin prepared is added in kneader, then the wood pulp described in formula ratio, mineral filler, pigment, solidifying agent and releasing agent is added, vacuum hydro-extraction under jacket steam heating, temperature controls at 50-65 DEG C, heat-up time is 1 hour, then steam off, material is cooled to less than 50 DEG C, obtains urea moulding material slurry;
2) by described in step 1) urea moulding material slurry send into moisture eliminator, control each joint hot blast temperature at 80-95 DEG C, the time is 150 minutes, and final section is cooled to less than 35 DEG C, obtain water content lower than 3% urea moulding material;
3) by step 2) urea moulding material of gained pulverizes by the weight ratio of formula and enters ball mill ball milling 3 hours, then drop into by the weight ratio of formula the melamine formaldehyde molding compound prepared, ball milling discharging separation after 3 hours more together, fine powder becomes work in-process, meal is shared equally into later ball milling after concentrating ball milling again;
4) moulding compound mixed through step 3) is dropped into granulation in tablets press, be then packaged as finished product through the particulate modified molybdenum urea moulding material sieving grain, separation obtains certain particle size scope, fine powder returns ball milling and carries out recycle.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105542391A (en) * | 2016-02-02 | 2016-05-04 | 温州达源贸易有限公司 | Urea-formaldehyde molding powder and preparation method thereof |
| CN107556698A (en) * | 2017-10-12 | 2018-01-09 | 溧阳市乔森塑料有限公司 | A kind of high temperature resistant urea moulding material and preparation method thereof |
| CN108084649A (en) * | 2017-12-29 | 2018-05-29 | 溧阳市乔森塑料有限公司 | Modified melamine-formaldehyde moulding compound and its preparation method and application |
| CN108819001A (en) * | 2018-05-10 | 2018-11-16 | 温州乔建塑料有限公司 | A kind of manufacturing process of the urea moulding material particle with antibacterial antistatic high glaze |
| CN114591594A (en) * | 2022-03-11 | 2022-06-07 | 溧阳市乔森塑料有限公司 | High-strength granular urea formaldehyde molding compound |
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2014
- 2014-05-22 CN CN201410217898.8A patent/CN105086356B/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105542391A (en) * | 2016-02-02 | 2016-05-04 | 温州达源贸易有限公司 | Urea-formaldehyde molding powder and preparation method thereof |
| CN107556698A (en) * | 2017-10-12 | 2018-01-09 | 溧阳市乔森塑料有限公司 | A kind of high temperature resistant urea moulding material and preparation method thereof |
| CN107556698B (en) * | 2017-10-12 | 2019-08-09 | 溧阳市乔森塑料有限公司 | A kind of high temperature resistant urea moulding material and preparation method thereof |
| CN108084649A (en) * | 2017-12-29 | 2018-05-29 | 溧阳市乔森塑料有限公司 | Modified melamine-formaldehyde moulding compound and its preparation method and application |
| CN108819001A (en) * | 2018-05-10 | 2018-11-16 | 温州乔建塑料有限公司 | A kind of manufacturing process of the urea moulding material particle with antibacterial antistatic high glaze |
| CN108819001B (en) * | 2018-05-10 | 2020-11-10 | 温州乔建塑料有限公司 | Manufacturing process of urea molding plastic particles with antibacterial, antistatic and high gloss |
| CN114591594A (en) * | 2022-03-11 | 2022-06-07 | 溧阳市乔森塑料有限公司 | High-strength granular urea formaldehyde molding compound |
| CN114591594B (en) * | 2022-03-11 | 2022-12-13 | 溧阳市乔森塑料有限公司 | High-strength granular urea-formaldehyde molding compound |
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