CN101519530A - Polyurethane coating roller and manufacture method thereof - Google Patents
Polyurethane coating roller and manufacture method thereof Download PDFInfo
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- CN101519530A CN101519530A CN200810033845A CN200810033845A CN101519530A CN 101519530 A CN101519530 A CN 101519530A CN 200810033845 A CN200810033845 A CN 200810033845A CN 200810033845 A CN200810033845 A CN 200810033845A CN 101519530 A CN101519530 A CN 101519530A
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Abstract
A polyurethane coating roller comprises a glue layer which comprises 50 percent to 60 percent of polyester dibasic alcohol, 20 percent to 30 percent of toluene di-isocyanate, 7 percent to 10 percent of prepolymer and 8 percent to 15 percent of curing agent. The manufacture method of the glue layer comprises the steps of: a) prepolymerization step, carrying out dehydration on the polyester dibasic alcohol, adding the toluene di-isocyanate to be mixed with the dehydrated polyester dibasic alcohol, carrying out prepolymerization reaction by adding the prepolymer, and then adding melted curing agent for mechanical mixing; b) pouring step, pouring the mixture on the roller core surface coated with adhesive; and c) post-treatment step, curing and machining the poured mixture. Therefore, the obtained polyurethane coating roller has stable glue roller hardness, excellent physical and mechanical properties such as tensile resistance, rebound and the like and excellent solution resistance property.
Description
Technical field
The present invention relates to the color steel sheet plant-scale equipment, particularly polyurethane coating roller of using of color coating unit and preparation method thereof.
Background technology
The color steel sheet product is mainly used in building materials field.Household electrical appliances purposes surface quality of products requires to be higher than the construction applications product far away.Because application roll is the parts that influence the key and the core of surface of steel plate coating quality, the excellence of its performance and the stable quality of household electrical appliances that directly determined with plate surface paint film coating quality.
Existing homemade household electrical appliances application roll in use can have a strong impact on the quality of household appliances in household electrical appliances product surface generation striated defective and the phenomenon that also can occur thickening in the limit portion that is with steel.The low hardness polyurethane application roll has obtained using widely owing to have advantages such as high mechanical strength, high abrasion, good solvent-proof performance, surfaceness are low abroad.Because China's polyurethane industrial starts late, whole production and manufacture level are comparatively backward, and at present domestic still do not have manufacturer and can produce tame electroplax polyurethane coating roller, so the man electroplax of Baosteel color coating mostly depends on import with polyurethane coating roller.The import application roll is because unfavorable factors such as price height, import cycle length, message feedback hysteresis are produced the bigger negative impact of running generation normally to Baosteel man electroplax.Through the check and analysis to the import application roll, we recognize following parameter:
1) glue-line hardness (Shao A): 52～58 ° (light red, U.S.'s import);
2) application roll surfaceness: Ra=0.8～1.4;
3) application roll right alignment: 0.05, linearity: 0.05, circle is beated: 0.05;
4) material: Polyester based Polyurethane Rubber(ASTM);
External polyurethane elastomer has years of researches and practical experience, is in higher research and application level stage.But with the application that only is confined to product that exchanges between China goes together.We have consulted a large amount of documents and data, and are few with the report of polyurethane rubber roller about tame electroplax abroad.The finish message of at present relevant polyurethane rubber roller glue-line physicals is as follows:
Table 1
| Salient features | Japan Wu Tian company | France BAUIE company | U.S. UNIROYAL |
| The activation life-span (branch) | 20～30 | 15～20 | 25～30 |
| Hardness (JSA) | 58 | 52 | 55 |
| 100% stretching (Mpa) | 1.67 | 2.1 | 2.5 |
| Tensile strength (Mpa) | 9 | 12 | 12 |
| Tear strength (KN/m) | 20 | 26 | 28 |
| Rebound resilience (%) | 25 | 26 | 25 |
Domestic urethane development strength mainly concentrates on the elastomerics of urethane foam and middle high rigidity (Shao A 〉=60 °).Be engaged in low hardness polyurethane elastic body (Shao A≤60 °) development and produce only be confined to several families.Be not applied at present the precedent of color coating unit household appliances application roll.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of suitable color coating unit man electroplax coating use, have high precision, high anti-solution property, and can satisfy coating thin (5～6 μ m), unit linear speed height (60～140m/min), great surface quality, high work-ing life glue-line polyurethane coating roller.
Polyurethane coating roller of the present invention comprises a glue-line, and this glue-line comprises: polyester diol 50～60%, tolylene diisocyanate 20～30%, performed polymer 7～10%, solidifying agent 8～15%.
Preferably, described polyester diol is poly-adipate glycol propylene glycol ester.
Preferably, described performed polymer is the performed polymer of Japanese Wu Tian company 218 models of producing.
Preferably, described solidifying agent is the solidifying agent of the II type produced of Japanese Wu Tian company.
Preferably, solidifying agent of the present invention also comprises promoting agent and stablizer, and preferred promoting agent is 6～15%, and stablizer is 0.2～5%.
According to polyurethane coating roller glue-line of the present invention, if polyester diol content is very few, can not with fully reaction such as MDI, make the NCO too high levels of free state; Polyester diol is too much, causes TDI etc. not enough, and product strength, hardness are not enough.Tolylene diisocyanate is too much, and hardness is too high, and tolylene diisocyanate is very few, and it's the end is past hardness.Performed polymer, solidifying agent are too much, and product hardness, tear strength are too high, the coating weak effect.Performed polymer, solidifying agent are very few, and at the bottom of hardness, the tear strength, rebound resilience is poor, wear resistance reduces.
The making method of polyurethane coating roller of the present invention surface glue-line comprises the steps:
A) prepolymerization step is being dewatered polyester diol, adds tolylene diisocyanate mixing back adding performed polymer and carries out prepolymerization reaction, and the solidifying agent that adds fusing then carries out mechanically mixing;
B) the cast step is scribbling the roller core surface casting said mixture of caking agent;
C) post-processing step is cured the said mixture of pouring into a mould and machining;
Wherein, the add-on of each component is: polyester diol is 50～60%, and tolylene diisocyanate is 20～30%, and performed polymer is 7～10%, and solidifying agent is 8～15%.
Preferably, described polyester diol is about 120 ℃ of dehydrations 1 hour 30 minutes～1 hour 40 minutes.
According to the present invention, if not in afore mentioned rules temperature, time range, can cause dehydration not exclusively, residual moisture participates in reaction, makes that the performed polymer viscosity that makes is bigger than normal, and NCO content reduces, and hardness reduces.
Preferably, described prepolymerization reaction is 90～100 ℃ of reactions 1 hour 30 minutes～1 hour 40 minutes.
If temperature, time are lower than specialized range, prepolymerization reaction is incomplete; Temperature, time are higher than specialized range, and the prepolymerization reaction fierceness is not easy control, is prone to accidents.
Preferably, kept 2 hours～20 hours after being coated with the caking agent of 4～6 μ m and being heated to about 80 ℃ on the roller core before the cast.
If not in the specified requirement scope, caking agent can not be attached on roll surface fully, in the use, degumming phenomenon can occur afterwards.
Preferably, described mixture carried out deaeration (deviating from totally to be as the criterion with bubble) in about 20 minutes 80～110 ℃ of preheatings before the cast.
If in specialized range, do not operate, can cause deaeration incomplete, residual bubble in the performed polymer, causing has a large amount of bubbles in the finished product.
Preferably, described curing is two sections sulfurations, and the fs is 110～120 ℃ of sulfurations 2～3 hours, if not at the appointed time, in the temperature range, gelling knot excessive velocities is reacted abundant inadequately; Subordinate phase is 100～110 ℃ of sulfurations 10～20 hours, if not at the appointed time, in the temperature range, MOCA etc. can not fully react, and can cause the NCO of free state too much, the inclined to one side end of hardness.
Wherein, described machining comprises:
Encapsulate roll surface after the sulfuration is carried out thick reconditioning;
Encapsulate roll surface to thick reconditioning cools off expansion, and wherein cooling is expanded and is meant that the roller to thick reconditioning cools off, and prevents that roll surface from expanding;
Measure cooling expansible roll surface roller footpath;
Roll surface is carried out the refine mill.
Preferably, described thick reconditioning is with 100 purpose abrasive bands.
Preferably, described refine is ground with 300 purpose abrasive bands.
The advantage of the polyurethane coating roller with glue-line that the method according to this invention is made is: 1) stable hardness of rubber roll, through check with hardness deviation≤2 of root rubber roll °; Physical and mechanical propertiess such as resilience are opened in excellent resisting; 2) You Yi anti-solution property has guaranteed the use repeatedly and the reconditioning of rubber roll glue-line; 3) replenish enhancing between each component mutually, and mix unanimity, guaranteed the operability of technology.
The piece because the reliable binding system of employing between roller core and the pour mixture, none glue-line of type approval test process shell.
The pouring technology of uniqueness of the present invention, 1) by selecting suitable material, guaranteed the pourable time of blend glue stuff; Low viscous mixture makes sizing material have the ability of impacting bubble from row; 2) reasonableness of the use of sophisticated equipment and technology establishment makes glue-line transparent, has got rid of impurity, and defective appears at the possibility on the qualified rubber roll.
Experiment has promoted the complete processing of soft rubber roll with empirical continuous accumulation repeatedly, the rubber roll surface working is reached or near the metal level of processing.
1) the glue-line surfaceness reaches≤Ra0.8, and roll surface does not have the knife mark of walking;
2) rubber roll linearity, form and position tolerance≤0.05mm such as right alignment;
3) tolerance of dimension of roller glue-line meets the drawing requirement fully, and the reparation of roller core also meets the Baosteel requirement;
The rubber roll surface quality accomplishes not have bubble, inclusion-free, no speck, other defective such as flawless.
Description of drawings
Fig. 1 is the synoptic diagram of polyurethane coating roller of the present invention.
Fig. 2 is the schema of an embodiment of the glue-line manufacture craft of polyurethane coating roller of the present invention.
Description of reference numerals
1 urethane glue-line
2 beaming rollers
3 diameters of axle
4 spindle noses
Embodiment
Introduce the present invention by the following examples and in conjunction with the accompanying drawings in more detail.
1, main raw and auxiliary material
A. polyester diol
Formal name used at school: poly-adipate glycol propylene glycol ester
Outward appearance: white waxy solid or water white transparency thick liquid
Molecular weight: 1400～2000 (number averages)
Water content :≤0.02%
Hydroxyl value: 60～80 (mgKOH/g)
Acid number: 1～3 (mgKOH/g)
Addition is 60～60%.
B. tolylene diisocyanate (TDI) (Mitsui or U.S. BASF)
Outward appearance: colourless to light yellow transparent liquid
Purity: 〉=98%
Hydrolysis chlorine: 0.01～0.06%
Addition is 20～30%
C. performed polymer: the model that Japanese Wu Tian company produces is 218 product, and addition is 7～10%.
D. solidifying agent: the II model solidifying agent that Japanese Wu Tian company produces, addition is 6～15%; The promoting agent and the stablizer of the II model that Japan Wu Tian company produces, addition is 0.2～5%.
E. caking agent; The model with trade(brand)name " Kai Muluoke " sale of Lip river moral rubber chemistry (Shanghai) Co., Ltd. is 218 product.
F. make sizing material promotor (being that white carbon black, performed polymer mix) by oneself.
More than various starting material all dewater in advance or keep dry, make water content low as much as possible.Preferably water content is less than 0.0015%.
Fig. 2 is the schema of an embodiment of the glue-line manufacture craft of polyurethane coating roller of the present invention.
The preparation of mould and roller core
Cleaning mould, brushing separant equably; Prepare frock, guarantee the stopping property of mould.
Check stand-by roller core 2, qualified roller core carries out sandblasting, uses its surface of solvent cleaning again.After treating solvent evaporates, at roller core surface uniformity ground brushing caking agent.
The roller core 2 of brushing caking agent is packed in the mould, send in the baking oven and heat, and control heat-up time and temperature be not less than 6 hours heat-up time under 110 ℃ of-120 ℃ of temperature, stand-by.
Wherein, because the rubber roll surface hardness of producing is low, hot soak condition (120 ℃ * 24 hours) again in the production process, and in use be subjected to solution long period of soaking and high speed rotating, therefore require the bond strength height between glue-line and the roller core, and bonding coat is thin, in case the immersion of solution.The novel caking agent that preferably adopts U.S. UNIROYAL company to produce is made every effort to overcome pine.
Prepolymerization step:
1) mixes, grind
To dewater earlier or the exsiccant starting material mix by prescription requirements, and stir to be placed in 90 ℃ of baking ovens and dried by the fire 15～30 minutes, be beneficial to reduce the dispersiveness of mixture viscosity and increase filler.
Utilize dispersing technology, mixture is fully stirred, make material uniform distribution in the solution, mix infiltration fully.
2) pre-polymerization
Uniform mixture metering is poured in the reactor, carry out dehydration reaction, make water content low as much as possible, be preferably less than 0.0015%.
By the input amount of formula calculation tolylene diisocyanate, when being cooled to below 75 ℃, drops into thing to be mixed tolylene diisocyanate, carry out prepolymerization reaction.
Pre-polymerization is dewatered after finishing.(NCO refers to active isocyano group in the organic isocyanate compound-N=C=O) to the NCO% of sampling analysis performed polymer, and is stand-by.
The cast step:
Use any suitable casting molding machine to pour into a mould, guarantee that each component of glue-line mixes each section performance unanimity;
Rubber roll processing is carried out according to the complete processing of new formulation, so that the rubber roll surface quality meets drawing and production requirement.
In performed polymer, add stablizer,, prolong the pourable time to reduce its speed of response; Make the fully oven dry before mixing of each component materials, deaeration makes its water content minimum; After each component materials is mixed, stir by high speed homogenization, deaeration reduces as far as possible and impacts bubble; Rationally control die temperature and material viscosity are eliminated the mechanical shock bubble of mixture generation voluntarily.
The glue-line complete processing:
Because of the surfaceness of glue-line, form and position tolerance, the requirement of tolerance of dimension is processed near iron and steel, and we have adopted the finish turning cutting, with 320
#The abrasive band sands flat, with 400
#The abrasive band correct grinding, pre-treatment, 600
#～1000
#The novel process of the branch class grinding-polishing of abrasive band polishing meets the requirements the rubber roll surface.
The method according to this invention is made application roll and is had following advantage:
1. the physical and mechanical properties of application roll (testing under 25 ℃ of conditions of normal temperature) is as shown in table 2.
Table 2
| Production batch | Hardness (Shao A) | Tensile yield (%) | Tensile strength at yield (MPa) | Tension set (%) | Tear strength (kN/m) | Resilience (%) | Abrasion (cm 3/1.6km) |
| One | 53 | 500 | 19 | 3 | 37 | 42 | 0.84 |
| Two | 55 | 490 | 20 | 3 | 36 | 42 | 0.4 |
| Three | 53 | 420 | 22 | 3 | 40 | 41 | 0.68 |
Annotate: 1. above data are provided by Rubber Parts quality of item monitoring station, Jiangsu Province;
2. the test source of data in the sample of producing rubber roll same period.
2. the formulated rubber material physical and mechanical properties is good
1) stable hardness of rubber roll, through check with hardness deviation≤2 of root rubber roll °; Excellent anti-opening, physical and mechanical propertiess such as resilience, the homemade synthetic rubber of similar hardness is suitable with external like product head and shoulders above.
2) You Yi anti-solution property has guaranteed the use repeatedly and the reconditioning of rubber roll glue-line.
3) replenish enhancing between each component mutually, and mix unanimity, guaranteed the operability of technology.
4) reliable binding system adopts the novel adhesion system, none glue-line of type approval test process piece that shells.
3. Du Te pouring technology
1) by selecting suitable material, guaranteed the pourable time of blend glue stuff; Low viscous mixture makes sizing material have the ability of impacting bubble from row;
2) reasonableness of the use of sophisticated equipment and technology establishment makes glue-line transparent, has got rid of impurity, and defective appears at the possibility on the qualified rubber roll.
4. experiment has promoted the complete processing of soft rubber roll with empirical continuous accumulation repeatedly, the rubber roll surface working is reached or near the metal level of processing.
1) the glue-line surfaceness reaches≤Ra0.8, and roll surface does not have the knife mark of walking;
2) rubber roll linearity, form and position tolerance≤0.05mm such as right alignment;
3) tolerance of dimension of roller glue-line meets the drawing requirement fully, and the reparation of roller core also meets the Baosteel requirement.
5. the rubber roll surface quality accomplishes not have bubble, inclusion-free, no speck, other defective such as flawless.
More than by specific embodiment the present invention has been carried out comparatively detailed explanation, but be not limited only to these embodiment, more other embodiment can also be arranged without departing from the inventive concept of the premise.
Claims (15)
1. a polyurethane coating roller comprises a glue-line, it is characterized in that, this glue-line comprises: polyester diol 50～60%, tolylene diisocyanate 20～30%, performed polymer 7～10%, solidifying agent 8～15%.
2. polyurethane coating roller according to claim 1 is characterized in that, described polyester diol is poly-adipate glycol propylene glycol ester.
3. polyurethane coating roller according to claim 1 is characterized in that, described performed polymer is the performed polymer of Japanese Wu Tian company 218 models of producing.
4. polyurethane coating roller according to claim 1 is characterized in that, described solidifying agent is the II type solidifying agent that Japanese Wu Tian company produces.
5. polyurethane coating roller according to claim 1 is characterized in that described solidifying agent also comprises promoting agent and stablizer.
6. polyurethane coating roller according to claim 5 is characterized in that, described promoting agent is 6～15%, and described stablizer is 0.2～5%.
7. the making method of a polyurethane coating roller surface glue-line comprises the steps:
A) prepolymerization step is being dewatered polyester diol, adds tolylene diisocyanate mixing back adding performed polymer and carries out prepolymerization reaction, and the solidifying agent that adds fusing then carries out mechanically mixing;
B) the cast step is scribbling the roller core surface casting said mixture of caking agent;
C) post-processing step is cured the said mixture of pouring into a mould and machining;
Wherein, glue-line comprises: polyester diol is 50～60%, and tolylene diisocyanate is 20～30%, and performed polymer is 7～10%, and solidifying agent is 8～15%.
8. method according to claim 7 is characterized in that, described polyester diol is at about 110～120 ℃, dewaters 1 hour 30 minutes～1 hour 40 minutes.
9. method according to claim 7 is characterized in that, described prepolymerization reaction is 90～100 ℃ of reactions 1 hour 30 minutes～1 hour 40 minutes.
10. method according to claim 7 is characterized in that, keeping temperature-time after being coated with the caking agent of 4～6 μ m and being heated to about 80 ℃ on the roller core before the cast is 2 hours～20 hours.
11. method according to claim 7 is characterized in that, described mixture carried out deaeration in about 20 minutes 80～110 ℃ of preheatings before the cast.
12. method according to claim 7 is characterized in that, described curing is two sections sulfurations, and the fs vulcanized 2～3 hours at 110～120 ℃, and subordinate phase was vulcanized 10～20 hours at 100～110 ℃.
13. method according to claim 7 is characterized in that, described machining comprises:
Encapsulate roll surface after the sulfuration is carried out thick reconditioning;
Thick reconditioning encapsulate roll surface is cooled off expansion;
Measure cooling expansible roll surface roller footpath;
Roll surface is carried out the refine mill.
14. method according to claim 13 is characterized in that, described thick reconditioning is with 100 purpose abrasive bands.
15. method according to claim 13 is characterized in that, described refine is ground with 300 purpose abrasive bands.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810033845A CN101519530A (en) | 2008-02-25 | 2008-02-25 | Polyurethane coating roller and manufacture method thereof |
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| CN200810033845A CN101519530A (en) | 2008-02-25 | 2008-02-25 | Polyurethane coating roller and manufacture method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102166799A (en) * | 2010-12-21 | 2011-08-31 | 攀枝花钢城集团铁路设备修造有限公司 | Horizontal production process of polyurethane rubber roller |
| CN104194308A (en) * | 2014-08-05 | 2014-12-10 | 宁波大洋实业发展有限公司 | Spinning multiplying wheel production and manufacturing method |
| CN106188458A (en) * | 2016-07-14 | 2016-12-07 | 山东省临沂市三丰化工有限公司 | A kind of stabiliser compositions of polyurethane curing agent |
| CN104441359B (en) * | 2013-09-22 | 2017-02-22 | 上海运安制版有限公司 | Manufacture method for polyurethane sponge roller outer-layer rubber die |
| CN114211670A (en) * | 2021-11-09 | 2022-03-22 | 上汽大众汽车有限公司 | High-precision trial production method of automobile model lamp |
| CN118082271A (en) * | 2024-04-17 | 2024-05-28 | 张家港市融通机械有限公司 | Production method of polyurethane rubber roller |
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2008
- 2008-02-25 CN CN200810033845A patent/CN101519530A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102166799A (en) * | 2010-12-21 | 2011-08-31 | 攀枝花钢城集团铁路设备修造有限公司 | Horizontal production process of polyurethane rubber roller |
| CN102166799B (en) * | 2010-12-21 | 2013-11-20 | 攀枝花钢城集团铁路设备修造有限公司 | Horizontal production process of polyurethane rubber roller |
| CN104441359B (en) * | 2013-09-22 | 2017-02-22 | 上海运安制版有限公司 | Manufacture method for polyurethane sponge roller outer-layer rubber die |
| CN104194308A (en) * | 2014-08-05 | 2014-12-10 | 宁波大洋实业发展有限公司 | Spinning multiplying wheel production and manufacturing method |
| CN106188458A (en) * | 2016-07-14 | 2016-12-07 | 山东省临沂市三丰化工有限公司 | A kind of stabiliser compositions of polyurethane curing agent |
| CN106188458B (en) * | 2016-07-14 | 2019-06-11 | 山东省临沂市三丰化工有限公司 | A kind of stabiliser compositions of polyurethane curing agent |
| CN114211670A (en) * | 2021-11-09 | 2022-03-22 | 上汽大众汽车有限公司 | High-precision trial production method of automobile model lamp |
| CN118082271A (en) * | 2024-04-17 | 2024-05-28 | 张家港市融通机械有限公司 | Production method of polyurethane rubber roller |
| CN118082271B (en) * | 2024-04-17 | 2024-07-05 | 张家港市融通机械有限公司 | Production method of polyurethane rubber roller |
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Open date: 20090902 |