CN100585722C - The precoating sheet metal that is used for the slot-in drive box - Google Patents
The precoating sheet metal that is used for the slot-in drive box Download PDFInfo
- Publication number
- CN100585722C CN100585722C CN200610149496A CN200610149496A CN100585722C CN 100585722 C CN100585722 C CN 100585722C CN 200610149496 A CN200610149496 A CN 200610149496A CN 200610149496 A CN200610149496 A CN 200610149496A CN 100585722 C CN100585722 C CN 100585722C
- Authority
- CN
- China
- Prior art keywords
- resin
- coated film
- sheet metal
- coating
- precoating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Laminated Bodies (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
A kind of precoating sheet metal that is used for the slot-in drive box comprises sheet metal, at formed chemical conversion coating on the sheet metal two sides, in chemical conversion coating formed coated film on the one side wherein.It comprises at least a base resin that is selected from the group that polyester series resin, epoxy series plastics and acryl resin form; At least a resin bead that is selected from the group that nylon series plastics pearl, fluorine-containing series plastics pearl and polyurethane series plastics pearl formed; At least a lubricant that is selected from the group that Brazil wax, Tissuemat E and microcrystalline wax form.This coated film has following surface, the arithmetic average deviation R of the profile of assessing that promptly should the surface
aBe 0.3-4.5 μ m, the mean breadth RSm of outline portion is 150-280 μ m, and the mean grain size of resin bead is 2.0-3.0 to the ratio of the coated film thickness of coated film A.
Description
Technical field
The present invention relates to be used to hold the precoating sheet metal of the slot-in drive box (slot-in drive cases) of electrical equipment and electronic equipment (as LCD TV, personal computer and DVD player).In the present invention, term " precoating " is to be used for meaning " at the die casting Front-coating mirror ".
Background technology
In recent years, the big step advanced holding the development aspect electrical equipment and the electronic equipment and the development of CD (as CD and DVD (digital video disk)).The slot-in drive box has begun to become universal, because it can make the driver box more save the space.Such slot system is the system with following function: when the naked leakage of CD, as long as CD is put in the slot, CD can enter the driver box automatically; And compare with traditional Trayconcept, CD can pass in and out slot more reposefully.Recently, in this slot-in drive box, use the precoating sheet metal.For example, uses the precoating steel disc, make the driver box, and thickness is arranged is 1 μ m or littler shallow layer on the surface that this shallow layer has good sliding capability within it.Because the sliding capability of its excellence, it is that advantage is arranged very much in the following areas: when CD inserted, the edge surface of CD contacted with the coated film surface with very little resistance, so that produces very little friction noise.Yet foreign matter very in a small amount mixes and is present in the coated film surface, and holiday does not come into question usually.Therefore, when CD when formed coated film contacts on the inner surface of driver box, CD may be swiped.Thereby, depending on the structure that the driver box is had, such precoating steel disc can not be used in some cases.
The slot-in drive box has the structure that the CD trend is swiped.Space between the inner surface of CD and driver box is very narrow, so that the inside surface of CD ram drive device box takes place, and the thickness and precision of this and CD self is relevant, and with any skew correlation of CD when the driving.When the collision at anything unexpected during optical media replication or recorded content occurs on the driver box, CD also may take place contact with the inside surface of driver box.Also following situation might take place further: how this puts into CD if depending on, when CD is that CD may contact with the inside surface of driver box when inserting the driver box with heeling condition.The inside surface of driver box can have various structures, and at the structure place of the inside surface of driver box, the part that might contact with CD is the plane, and therefore, both contact Face to face.
Various CDs have been developed.When optical disc surface was slightly swiped, some CD may record adverse effect to duplicating and writing.Therefore disadvantageously, if CD owing to contacting with the inside surface of driver box and being swiped, can be able to not use CD.
Swipe in order to prevent CD, disclosed as Japanese Patent Application Laid-Open No.2003-242703 (patent documentation 1), it proposes to form on the surface of any member in following that might come in contact with CD, CD parts and mainly contains urethane resin, and contains the scratch resistant obliterating layer of polyurethane particles and fluororesin powder at least, to prevent that CD from being swiped.
Yet disclosed scratch resistant obliterating layer is the post-treatment coatings that part forms by applying after die casting in patent documentation 1.This post-treatment coatings must form by applying or all apply each die-cast product on certain layer thickness top.Therefore, have following problem, this coating needs very complicated technology, causes throughput rate low, and the cost of products increase is also just inevitable.
Simultaneously, because the following stated, disclosed coating material is difficult to be converted to the coating material that carries out precoating in patent documentation 1.
In the disclosed scratch resistant obliterating layer, whippy urethane resin is used as base resin in patent documentation 1.Therefore, when CD contacted with scratch resistant obliterating layer, formed coating may be out of shape, so that, to compare with using other resin situation, the contact area of coating and CD becomes bigger.The increase of this contact area has damaged anti-scraping performance.Therefore, littler in order to make contact area, polyurethane particles is incorporated in the coating with 20-150 weight portion (based on the base resin of 100 weight portions).In the coating that comprises a large amount of like this polyurethane particles, polyurethane particles trends towards breaking away from coating, so that can not show fully by adding the anti-scraping effect that polyurethane particles produced.
In addition, in patent documentation 1 disclosed technology, the fluororesin powder of low friction must join in the coating as key component, and its amount is 10-150 weight portion (base resin is 100 weight portions).Because such coating contains a large amount of fluororesin powders, can there be following problem: the not only increase of inevitable material cost, and when it being folded come (coil up), be difficult to roll (wind up) product sheet.
In addition, in patent documentation 1 disclosed coated film, fluororesin powder can not liquefy under the temperature (80 ℃-140 ℃) of baking coated film, and remains on the state of softening powder.Therefore, can not obtain any performance that enough is penetrated into base resin, this trends towards causing that the part anisotropically disperses, so sliding capability is inconsistent.Also there is this problem.
A kind of precoating aluminum alloy sheet that is used for the driver box of electronic equipment (for example personal computer) is also proposed, the target of this precoating aluminum alloy sheet be when die casting and since with other building block contact preventing driver box self swiped (Japanese Patent Application Laid-Open No.2004-98624).Its coated film contains base resin (as polyester series resin, oleic series resin bead etc.) and inner wax (inner wax) (as Tissuemat E).Yet what this coated film was considered is to prevent that self from being swiped, rather than prevents that other member's CD from being swiped.More specifically, in this coated film, pearl is added in the base resin so that coated film is firm; Further, add the slickness that inner wax provides coated film.Thereby the basic concepts of this coated film are to make from being not easy to be swiped in die casting.Therefore, this coated film mainly considers to satisfy the performance requirement of driver box outer surfac, and does not consider to satisfy the performance requirement (preventing that promptly other member's CD from being swiped) as driver box inside surface among the present invention.The present inventor has assessed the anti-scraping of the CD performance of coated film, and acryl resin pearl and Brazil wax are added in the vibrin in coated film.As a result, they confirm that CD is seriously swiped.
Summary of the invention
The purpose of this invention is to provide a kind of precoating sheet metal, this precoating sheet metal is mainly used in the slot-in drive box of electrical equipment and electronic equipment, it has the anti-scraping of excellent CD performance, but also only produce very little friction noise, and guarantee good rollable (when it is folded), improved throughput rate and low production cost.
Thing of the present invention is a kind of precoating sheet metal that is used for the slot-in drive box, and it comprises:
Sheet metal;
At the formed chemical conversion coating in the two sides of sheet metal;
Formed coated film A on one of chemical conversion coating, it contains at least a base resin a1 that is selected from the group of being made up of polyester series resin, epoxy series plastics and oleic series resin; At least a resin bead a2 that is selected from the group of being formed by nylon series plastics pearl, fluorine-containing series plastics pearl and polyurethane series plastics pearl; At least a lubricant a3 that is selected from the group of forming by Brazil wax, Tissuemat E and microcrystalline wax;
This coated film A has a kind of surface, arithmetic average deviation (arithmetic average roughness) R of the profile of assessing on this surface
aBe 0.3 μ m-4.5 μ m, the mean breadth of outline portion (outline portion average length) RSm is 150 μ m-280 μ m, and the ratio of the coating film thickness of the mean grain size of resin bead a2 and coated film A is in the scope of 2.0-3.0.
In the preferred embodiment of the present invention, resin bead a2 is a nylon series plastics pearl, and coated film A has a kind of surface, the arithmetic mean irrelevance R of the profile of assessing on this surface
aBe 3.0 μ m-4.5 μ m, the mean breadth RSm of outline portion is 200 μ m-280 μ m.
The present invention another preferred embodiment in, resin bead a2 is fluorine-containing series plastics pearl, coated film A has a kind of surface, the arithmetic mean irrelevance R of the profile of assessing on this surface
aBe 0.3 μ m-0.6 μ m, the mean breadth RSm of outline portion is 200 μ m-220 μ m.
The present invention another preferred embodiment in, resin bead a2 is a polyurethane series plastics pearl, coated film A has a kind of surface, the arithmetic mean irrelevance R of the profile of being assessed on this surface
aBe 1.0 μ m-2.5 μ m, the mean breadth RSm of outline portion is 105 μ m-250 μ m.
In the preferred embodiment for the present invention of using polyurethane series plastics pearl, R
aSatisfy following relational expression: 200≤RSm+73 * Ra≤350 with RSm.
In further preferred embodiment of the present invention, at the 1mm of coated film A
2In the surface, 4 or the reunion piece still less of 35 or more resin bead a2 occur including, coated film A is 0.15 or littler at its surperficial dynamic friction coefficient.
In further preferred embodiment of the present invention, the precoating sheet metal further is included in formed electroconductive resin coating B on the chemical conversion coating another side, and it comprises: at least a base resin b1 that is selected from the group of being made up of polyester series resin, epoxy series plastics, oleic series tree institute fat; A kind of nickel filling material b2 that includes the nickel filling material of lepidiod nickel filling material and chain; And at least a lubricant b3 that is selected from the group of forming by Tissuemat E, Brazil wax and microcrystalline wax.
The content of filling material b2 is the 10-70wt% based on base resin b1 solid substance quantity, and the content of lubricant b3 is the 1-5wt% based on resin solid thing amount.
The thickness of electroconductive resin coating B is 0.2-2.0 μ m.
In further preferred embodiment of the present invention, the precoating sheet metal further is included in the resinous coat C (replacing electroconductive resin coating B) of formed heat radiation and conduction on the chemical conversion coating another side, and it comprises at least a base resin c1 that is selected from the group of being made up of fluorine-containing series plastics, epoxy series plastics, polyester series resin, oleic series resin and polyurethane series plastics; At least the heat sink material c2 that comprises graphite; And the conductive material c3 that comprises the nickel filling material at least.
Precoating sheet metal of the present invention has the coated film (coated film A) of using specific base resin.Therefore, when this precoating sheet metal is made the driver box that there is coated film inside, if any contact member such as CD contact with coated film, littler distortion can take place in coated film, so the contact area between coated film and any contact member such as the CD can be littler, the anti-scraping of CD performance can improve.
Precoating sheet metal of the present invention have the resin bead using suitable hardness and suitable sliding capability is provided coated film (coated film A).And, the arithmetic mean irrelevance R of the profile of assessing of this coated film
aBe arranged on described scope (Ra:0.3-4.5 μ m, RSm:105-280 μ m) with the mean breadth RSm of outline portion, and the mean grain size of resin bead is to the described scope (2.0～3.0) that is arranged on than of coated film thickness.This can make resin bead still less come off, and keeps less contact area between coated film and any contact member such as the CD, therefore, can make the person of making contact to be not easy to be swiped.In addition, the coated film surface has suitable irregularity degree, thereby if stick to the coated film surface as any foreign matter (as dust, spot or waste silk), it can be hidden in the groove of irregularity degree; And if stick on the heap bag (hill), it can move in the groove.Therefore it can not contact with CD, and makes the latter be not easy to be swiped.And the coated film surface has suitable like this irregularity degree, and improving at its edge surface and the sliding capability that contacts between the member, so friction noise can be very little.And precoating sheet metal of the present invention is suitable for keep pressing oil when die casting, and therefore, during die casting, coated film also is not easy to be swiped.
Precoating sheet metal of the present invention have the lubricant that also uses the fusing point lower than baking temperature coated film (coated film A), therefore, it does not have sliding capability heterogeneous.Owing to used specific lubricant, the precoating sheet metal has suitable sliding capability, and works as it at manufacture process mid-game time-out, and the good performance of rolling is also arranged.
Precoating sheet metal of the present invention can further have the described electroconductive resin coating B on the relative one side of coated film A, and therefore, the outside surface of driver box can electromagnetic screen or can ground connection.In addition, in another embodiment, the precoating sheet metal can have the coated film C on the relative one side of coated film A, and it has described resistance and driver box surface temperature.Therefore, the outside surface of driver box can electromagnetic screen or ground connection, and the heat that accumulates in driver box inside is remained more in a small amount.
Description of drawings
Fig. 1 is the sectional view that is used for the precoating sheet metal of slot-in drive box according to the present invention.
Preferred implementation
By providing preferred embodiment detailed hereafter the present invention.
Precoating sheet metal of the present invention mainly is made up of following: sheet metal, at formed chemical conversion coating on the sheet metal two sides, at formed coated film A on one of chemical conversion coating (perhaps passing through undercoat) and preferred formed electroconductive resin coating B on another chemical conversion coating.
A. sheet metal
Sheet metal used in the present invention is had no particular limits,, and also have enough die casting processability as long as it has sufficiently high intensity can prepare the driver box of electrical equipment and electronic equipment part.It can be preferably by the aluminium alloy of fine aluminium, aluminium alloy such as JIS5000 class, spelter coating steel disc or stainless steel substrates or any metal sheet metal that 0.1-2.0mm thickness is typically arranged.
B. chemical conversion coating
Chemical conversion coating is had no particular limits,, and can guarantee and the high-adhesion between the two as long as it is between the surface and resinous coat of sheet metal.For example, with regard to the aluminum alloy sheet situation, spendable have by using the formed chemical conversion coating of phosphoric acid chromaking Treatment Solution, and this chemical conversion coating is very cheap, and easy to use; Perhaps handle formed chemical conversion coating by coating class zirconium, this chemical conversion coating does not cause the variation of Treatment Solution component, and does not need to wash with water.This chemical conversion is to be undertaken by a kind of described chemical conversion solution of spraying on aluminum alloy sheet, is perhaps undertaken by making aluminium alloy be immersed in a period of time described in the chemical conversion solution under described temperature.With regard to spelter coating steel disc or stainless steel substrates situation, chemical conversion coating is by using phosphating composition (except chromaking is handled) to form.
Before carrying out chemical conversion, in order to remove any dirt from the sheet metal surface or to control its superficial makings, sheet metal can preferably use sulfuric acid, nitric acid, phosphoric acid etc. to carry out acid treatment (washing), perhaps uses NaOH, sodium phosphate, sodium silicate etc. to carry out alkali treatment (washing).This surface treatment by washing also can be undertaken by a kind of described Treatment Solution of spraying on sheet metal, perhaps by making sheet metal be immersed in one described period in the Treatment Solution under described temperature.
C. coated film A
Then, coated film A is formed on the wherein one side of chemical conversion coating.Coated film A can use the formed coating of coating material to prepare by baking, this coating material is to prepare in the following manner, promptly merge base resin (as the polyester series resin) as solvent, specific resin bead and specific lubricant, and dissolving or be dispersed in the suitable solvent.Simultaneously, coated film A can also form by the powder coating of specific base resin, resin bead and lubricant mixture (not using any solvent).
Formed coated film A is characterized as, and the mean grain size that the arithmetic mean of the profile of being assessed of this coated film A departs from mean breadth RSm of Ra and outline portion (all being the index of surfaceness) and resin bead all is set at described scope to the ratio of the bed thickness of coated film.The mean breadth RSm of outline portion is an arithmetic mean.
C-1. surfaceness
The surfaceness of coated film A is restricted to: Ra is 0.3 μ m-4.5 μ m, and RSm is 105 μ m-280 μ m.As illustrated in Fig. 1, the surfaceness R of coated film A is expressed as from the coated film surface (does not have resin bead to occur) to the height (being the height difference of the irregularity degree on coated film surface) by the formed outshot of resin bead (heap bag).As illustrated in addition in Fig. 1, the space length RS of outline portion representative is by distance between the formed outshot of resin bead (heap bag).The measured value of Ra and Rsm is the value that is obtained according to JIS B0601.These values also comprise the sparse property of layer thickness etc., but they mainly depend on the resin bead amount of layer thickness, adding, the particle diameter of resin bead.Therefore, Ra can be counted as the mean value of R, and RSm can be counted as the mean value of RS.Ra and RSm are set in above-mentioned scope, can make coated film A have the anti-scraping of good CD performance, and friction noise are little.
If Ra is less than 0.3 μ m, very little by the height of the formed outshot of resin bead (heap bag), so that the coated film surface can not partly become very little with the contact area that contacts between member's CD at driver box inside surface, tends to CD is swiped.If Ra is greater than 4.5 μ m on the other hand, very big by the height of the formed outshot of resin bead (heap bag), so that the resistance that is produced when their rub the edge surface of CD is very high, thus make big friction noise.
If RSm is less than 105 μ m, because the very small distance between the formed outshot of resin bead (heap bag), the contact area between coated film surface and the contact member CD is very big, so that CD is swiped at an easy rate.If RSm is greater than 280 μ m on the other hand, very big by the distance between the formed outshot of resin bead (heap bag), so that the resistance that is produced when the edge surface of their friction CDs is very high, thus the very big noise of generation.More specifically, if it is very big by the distance between the formed outshot of resin bead, CD moves, its edge surface then keeps being contacted by the formed outshot of resin bead (heap bag) with a spot of, therefore the resistance of each outshot (heap bag) becomes very high when sliding, and also makes a large amount of noises.In addition on the one hand, very little by the distance between the formed outshot of resin bead (heap bag), CD moves, its edge surface then keeps and a large amount of being contacted by the formed outshot of resin bead (heap bag), therefore, sliding resistance at each outshot (heap bag) is very low, thereby friction noise can not taken place.
The kind that sliding capability and hardness can depend on resin bead a2 is and different, and therefore, the scope of the preferred value appointment of Ra and RSm also can be different.
When resin a2 was nylon series plastics pearl, Ra can be 3.0 μ m-4.5 μ m, and RSm can be 200 μ m-280 μ m.
When resin a2 was fluorine-containing series plastics pearl, Ra can be 0.3 μ m-0.6 μ m, and RSm can be 200 μ m-220 μ m;
When resin a2 was polyurethane series plastics pearl, Ra can be 1.0 μ m-2.5 μ m, and RSm can be 105 μ m-250 μ m.
For the surface physical properties of above-mentioned Ra and RSm value being provided for coated film A, can suitably control the mean grain size of resin bead a2 and the amount that they added, the thickness of coated film A etc.
When using the polyurethane series plastics as resin bead, Ra can be 1.0 μ m-2.5 μ m, and RSm can be 105 μ m-250 μ m, and further, the relation between Ra and the RSm satisfies following equation (1).When the contact member contacts with coated film, this can make resin bead a2 elastic deformation, produce a kind of absorption and contact the cushioning effect of caused any collision by this, and by between coated film and contact member, keeping suitable contact area to improve sliding capability.As a result, the anti-scraping of CD performance can further be improved.
200≤RSm+73×Ra≤350 (1)
That is, on the coated film surface, form suitable irregularity degree, make between coated film and the contact member to keep suitable contact area, thereby, can make the person of making contact to be not easy to be swiped.When very little as the Ra of heap bag altitude index and as the heap bag between the RSm of range index when very little, promptly when RSm+73 * Ra value less than 200 the time, heap wraps has very little height, distribution is very tight each other.Therefore,, contact the member and understand slight deformation when by forcing load when causing that contact member such as CD contacts with the coated film surface for the contact member, thereby, with the heap bag quantity increase that contacts the contacted coated film of member.As a result of, sliding resistance becomes big on the coated film surface, and foreign matter can not be hidden in the heap bag groove easily, and therefore, this makes the contact member be easy to be swiped.
On the other hand, when Ra is very big, when RSm is also very big, promptly when RSm+73 * Ra value surpassed 350, the heap bag had bigger height, it is very sparse to distribute each other.Therefore, when causing that contact member such as CD contact with the coated film surface for the contact member by forcing load, the contact member understands slight deformation, thereby the load of wrapping at single heap increases.As a result, sliding resistance becomes big on the coated film surface, therefore, makes the contact member be easy to be swiped, and this wraps highly little with heap and distributes that situation is the same closely.
Sliding resistance can be not really little by selecting on the coated film surface, also Ra and RSm value not very big, in OK range are controlled, and is carried on the contact member even surpass the load of 200g.The present inventor experimental study can obtain the Ra of better sliding resistance control effect and the relation between the RSm, and find: under the situation that satisfies equation (1), the effect that can obtain to merit attention.When satisfying equation (1), by the sliding resistance control effect of this excellence, the anti-scraping of contact member's CD performance can more effectively obtain easily.
C-2. the mean grain size Pd of resin bead a2 is to the thickness of coated film A.
About the thickness (after this describing) of coated film A and the mean grain size Pd (described as the back) of resin bead a2, Pd is defined as 2.0-3.0 to the ratio of coated film thickness.If less than 2.0, contact member such as CD trend come in contact with coated film surface portion (resin bead not occurring) Pd to the ratio of coated film thickness, thereby trend is rubbed CD.If Pd surpasses 3.0 to the ratio of coated film thickness on the other hand, the resin bead trend breaks away from coated film when die casting, thereby CD is swiped, and this is because the quantity of resin bead a2 is inadequate.And if this ratio surpasses 3.0, contact member's (CD) edge surface causes high sliding resistance attached to the coated film surface, also makes a large amount of friction noises.
C-3. how resin bead a2 keeps distribution
On the surface of coated film A, how to keep distribution about resin bead a2, be limited to every square millimeter of appearance by 35 or 4 or reunion piece still less that more resin bead a2 formed.Can observe them and how keep distribution, as (amplifying 100 times) under at optical microscope.When resin bead a2 appears on the coated film surface with good disperse state, can diminish with the contact area of CD, to improve the anti-scraping performance of CD.If resin bead a2 appears on the coated film surface with aggregating state on the other hand, big with the contact area of CD when CD and coated film surface contact, so that the scraping that produces owing to reunion may take place in CD.The present inventor has done research widely, found that: as long as at 1mm
2A reunion piece in the quantity of resin bead smaller or equal to 34, the anti-scraping of CD performance can be very good.They found afterwards: even at 1mm
2One of them reunion piece in the quantity of resin bead more than or equal to 35, the performance of the anti-scraping of CD also is gratifying, is less than and equals 4/mm as long as comprise this reunion piece more than or equal to 35 resin bead
2If should the reunion piece more than or equal to 5/mm
2, then can obtain the anti-scraping of relatively poor CD performance.
C-4. the dynamic friction coefficient of coated film A
The dynamic friction coefficient that limits coated film A is smaller or equal to 0.15.If the dynamic friction coefficient of coated film A is greater than 0.15, its surface has poor greasy property, trends towards making when die casting coated film to be swiped.The dynamic friction coefficient of coated film A is preferably more than and equals 0.03.If its dynamic friction coefficient is less than 0.03, it may have high sliding capability, so that can cause difficulty when it is folded.
C-5. coated film thickness β
The thickness β of coated film A is preferably 4 μ m-20 μ m (resin bead not occurring in this part).If its thickness β is less than 4 μ m, resin bead trends towards breaking away from coated film when die casting, thereby trend is swiped CD, and this is because the quantity of resin bead a2 is inadequate.If its thickness β surpasses 20 μ m on the other hand, the height difference of the irregularity degree on coated film surface is very little to the ratio of coated film β, so that any small foreign matter (as dust, spot or the waste silk) trend attached to the coated film surface comes in contact with CD, thereby CD is swiped.Incidentally, because the height of the irregularity degree on coated film surface has suitable difference, any small dust, spot or waste silk attached to the coated film surface can be hidden in the groove of irregularity degree, and, if wrap attached to heap, therefore it can move in the groove,, such foreign matter can not come in contact with CD, makes the latter be not easy to be swiped.
C-6. base resin a1
With regard to base resin a1, at least a resin is the group that is selected from following composition: polyester series resin, epoxy series plastics and oleic series resin.That is to say, can use a kind of or two kinds or more kinds of this resinoid.When contact member (as CD) came in contact with coated film, these resins can make coated film that littler distortion takes place, and coated film is diminished with the contact area that contacts between member such as the CD, thereby were improved at the anti-scraping of CD aspect of performance.
With regard to the polyester series resin, can use the alkyd resin of alkyd resin, unsaturated polyester resin, modification etc.Alkyd resin is a kind ofly to have as skeleton, by polybase acid (as phthalic anhydride) and the formed condensation product of polyhydroxy-alcohol (as glycerine) and with the oil or the fatty modified resins that comprise by fatty acid.It can be categorized into short oil alkyd resin, medium oil alkyd resin, long oil alkyd resin and overlength oil alkyd resin, and this depends on the type and the content of employed oil or fat.Unsaturated polyester resin is with two hydroxyl alcohol esterification to take place by undersaturated polybase acid or saturated polybase acid to synthesize.With regard to polybase acid, can use phthalic anhydride, isophathalic acid, terephthalic acid (TPA) and fatty acid.With regard to two hydroxyl alcohol, mainly use propylene glycol.With regard to the alkyd resin of modification, can use alkyd resin by polymerisable monomer such as natural resin, phenolics or the modification of styrene institute.
With regard to the epoxy series plastics, can use epoxy resin, bisphenol F epoxy resin of bisphenol A epoxide resin, acyl group modification etc.
With regard to the oleic series resin, can use the acryl resin that is obtained by polymerization one or both or multiple monomer such as acrylic acid, methacrylic acid, methyl methacrylate and/or ethyl acrylate.
The preferred polyester series resin that uses, it is not easy to cause that in processing coated film breaks during as die casting, and has good operability when coating, and also very favourable on the cost.
C-7. resin bead a2
Coated film A introduces resin bead a2, and when the contact member contacted with coated film, elastic deformation can take place resin bead a2, contacts the cushioning effect of caused any collision to produce a kind of absorption by this.This improves the anti-scraping of the CD performance to contact member such as CD.
Such resin bead a2 to upper process, therefore, compares with the situation that does not add resin bead on the surface of coated film, can make the person of making contact to littler as the contact area between CD and the coated film surface.As a result of, coated film A has improved by making the anti-scraping of the CD performance (when CD contacts with the coated film surface) to CD improve desired sliding capability.Yet if add acryl resin pearl (it can provide high hardness), CD may can be become problem by scraping.On the contrary, introduce one or both or the multiple resin bead that is selected from the group of following composition: nylon series plastics pearl and fluorine-containing series plastics pearl (being rich in slickness) and polyurethane series plastics pearl (high resilience) then can obtain the anti-scraping of sufficient CD performance.
With regard to polyurethane series plastics pearl, spendable have those by two isocyanide esters and the addition polymerization of two hydroxyls alcohol are that obtained, that those are obtained with the reaction of dichloro formic acid second diester by diamines under the situation that the dehydrochlorination agent occurs, those are obtained with the ethyl carbonate reaction by diamines, those by transform omega-amino-alcohol be chloro-carbonate or carbamate and make its concentrated that obtained, those are obtained by two Polyurethane and diamine reactant.The main polyurethane series resin bead of using those to be obtained by diisocyanate and the addition polymerization of two hydroxyl alcohol.With regard to diisocyanate, mainly use toluene diisocyanate (2,4-toluene diisocyanate and 2, the potpourri of 6-toluene diisocyanate).With regard to two hydroxyl alcohol (having polyhydric compound), the polyesters of mainly using ethers such as polyoxypropylene glycol or polyoxygenated third-polyoxyethylene glycol and being obtained by fatty acid and ethylene glycol condensation reaction.
With regard to nylon series plastics pearl, can use 6-nylon, 6,6-nylon, 3-nylon, 4-nylon, 7-nylon, 11-nylon, 12-nylon, 6,10-nylon, 6, the resin bead of 12-nylon etc.In these resins, preferably use 6-nylon, 6,6-nylon and 6,10-nylon.
With regard to fluorine-containing series plastics pearl, can use polytetrafluoroethylene (PTFE), tetrafluoroethylene/perfluoro alkyl vinyl ether co-polymer (PFA), tetrafluoroethene/hexafluoropropylene copolymer (PFP), polychlorotrifluoroethylene (PCTFE), ethylene-tetrafluoroethylene copolymer (ETFE), ethylene-chlorotrifluoro-ethylene copolymer (ECTFE), poly-inclined to one side vinylidene fluoride (PVDF), polyvinyl fluoride (PVF), polychlorotrifluoroethylene (PTFCE) or poly-dichloro difluoroethylene (DCDFE).In these resins, most preferably use polytetrafluoroethylene (PTFE).
The fluorine-containing series plastics that is used for resin bead a2 is the form with pearl, and with add aforementioned patent document 1 in fluororesin powder in the disclosed contrivance compare, better dispersiveness is arranged in base resin.Therefore, the fluorine-containing series plastics of this pearl has following advantage: compare with pulverous fluororesin, its sliding capability is not easy to take place the situation of non-homogeneous.
The mean grain size Pd of employed resin bead a2 is 5 μ m-40 μ m.If the mean grain size Pd of resin bead a2 is less than 5 μ m, can not diminishes with the contact area of CD, so that trend towards making CD to be swiped.If the mean grain size Pd of resin bead a2 is greater than 40 μ m on the other hand, on the surface of coated film, high sliding resistance may cause producing big friction noise.
The content of resin bead a2 can be 3-20wt% (based on the weight of the base resin of coated film A).If the content of resin bead a2 is less than 3wt%, contact member (CD) trends towards contacting with coated film surface portion (resin bead a2 not occurring), thereby trends towards making CD to be swiped.If the content of resin bead a2 surpasses 20wt% on the other hand, resin bead trends towards breaking away from coated film when die casting, thereby because the quantity of resin bead a2 is not enough, trends towards making CD to be swiped.
C-8. lubricant a3
Coated film A further comprises lubricant a3.With regard to lubricant a3, can use a kind of or two kinds or more of groups that are selected from following composition: Brazil wax, Tissuemat E and microcrystalline wax.Brazil wax is a kind of vegetable wax, mainly contains senior fatty ester, and fusing point is 78-86 ℃.With regard to Tissuemat E, can use molecular weight to be 600-12000, fusing point Tissuemat E as 70-140 ℃.Microcrystalline wax is a kind of crystalline wax that contains the microlite that obtains from petroleum component, and operable is that 600-900, fusing point are 60-100 ℃ microcrystalline wax just like molecular weight.
These lubricants a3 provides the greasy property on coated film surface when being shaped as die casting, improve the scraping resistance on coated film surface, in addition, after the die-casting process of precoating sheet metal, have the effect that greasy property is provided to the coated film surface, thereby make the littler friction force of generation between CD and the coated film surface.Provide agent such as fluororesin powder to compare with greasy property, a3 is more cheap for these lubricants, so the cost of material can reduce.
In addition, when fluororesin powder at baking temperature (usually from 200 ℃ or higher) when down maintenance is not melted to 300 ℃ or lower, these lubricants are liquid in this temperature range.Therefore, fluororesin powder can not be penetrated into base resin fully, thereby, can not fine be distributed to whole coated film equably, consequently make sliding capability non-homogeneous.By contrast, lubricant used in the present invention can be penetrated into base resin well, therefore, can fine be distributed to whole coated film equably, thereby obtains in whole coated film without any sliding capability heterogeneous.
The content of lubricant a3 can be preferably 0.2-3wt% for 0.2-10wt% (based on the weight of base resin a1).If its content is less than 0.2wt%, then the coated film surface can not provide enough greasy properties, so that coated film trends towards being swiped when die casting, and CD also trends towards being swiped.If the content of lubricant a3 surpasses 10wt%, then when it at generative process mid-game time-out, the precoating sheet metal can slide, thus make roll very difficult.
C-9. adjuvant
For the coating material that is used for forming coated film A in the present invention, can add pigment, pigment dispersing agent, mobile modifier, levelling agent, anti-explosion adjuvant, antiseptic, stabilizing agent etc.In order to obtain the desired common performance of coating performance and precoated material, normal these adjuvants that use in common coating material.
C-10. form coated film
Coating material can prepare in the following manner, promptly uses base resin a1, resin bead a2 and lubricant a3 as solvent, adds an amount of above-mentioned adjuvant, these dissolvings or be dispersed in the suitable solvent.This coating material can directly be coated in chemical conversion coating with coating roller (roll coater) and wherein simultaneously go up (perhaps on bottom, under the bottom situation that is after this described in detail), then in the baking oven that keeps described temperature, handle described a period of time, toast and drying.With regard to solvent, spendable have benzene, toluene, methyl alcohol, ethanol, ethyl acetate, butyl acetate, cellosolve, butyl cellulose solvent, 1,4-dioxane, tetrahydrofuran, cyclohexane, isophorone, isobutyl alcohol, dimethylbenzene, ethylbenzene, methyl ethyl ketone, diacetone alcohol, an ethylene glycol monobutyl ether.Coating material also can apply with the mode that air atomizer, bar shaped are coated with machine replacement coating rollers such as (bar coater).
D. bottom (undercoat layer)
Between chemical conversion coating (forming coated film A thereon) and coated film A, can provide the bottom that improves both adhesion properties.This bottom is had no particular limits,, and also have good die-casting process performance as long as it can provide good adhesiveness between chemical conversion coating and coated film A.For example, can use bottom, it is to form by the coating is made up of coating material of baking, this coating material comprise a kind of can with the fine compatible resin of base resin a1 (formation coated film A's).With regard to the resin that is used for bottom, the preferred use and the same resin that is used for the base resin a1 of coated film A.The layer thickness of bottom is 3 μ m-15 μ m, is preferably 5 μ m-10 μ m.
Bottom can be made of multilayer, perhaps between bottom and coated film A, can provide by individual layer or other coated film that multilayer constituted.
Be coated with modes such as machine with coating roller, air atomizer, bar shaped, this bottom can form by direct applying coating material on chemical conversion coating, then handles described a period of time in the baking oven that keeps described temperature, toasts and drying.
E. electroconductive resin coating B
The precoating sheet metal can be formed like this, promptly on the relative outer surface of coated film A, electroconductive resin coating B further is provided, this coating B be after die casting on the outer surface of driver box formed surface, and mainly comprise base resin b1, nickel filling material b2 and lubricant b3.In this case, can provide other chemical conversion coating on sheet metal, form outer surface on one side of this sheet metal, this outer surface is on one side relative with coated film A, and electroconductive resin coating B is formed on this outer surface.With regard to electroconductive resin coating B, can use by applying the formed coated film of a kind of coating material, this coating material is to prepare by mixed Ni filling material and wax in organic resin, as opening among the No.2001-29885 disclosed as the present patent application spy.
E-1. layer thickness
The thickness of electroconductive resin coating B is 0.2 μ m-2.0 μ m.If its thickness is less than 0.2 μ m, it has good electrical conductivity, but has the poor corrosion resistance and the performance of suitable die-casting process.If its thickness surpasses 2.0 μ m, the nickel filling material can still less be exposed to the surface, and this causes the low electric conductivity energy.
E-2. base resin b1
With regard to regard to employed base resin b1 among the electroconductive resin coating B, can use a kind of or two kinds or more of resins that are selected from the group of following composition: polyester series resin, oleic series resin and epoxy series plastics.With regard to the polyester series resin, can use the alkyd resin of alkyd resin, unsaturated polyester resin, modification etc.With regard to the oleic series resin, can use the oleic series resin that is obtained by a kind of or two kinds or more of monomers such as acrylic acid, methacrylic acid, methyl methacrylate and/or ethyl acrylate polyreaction.With regard to the epoxy series plastics, can use bisphenol A epoxide resin, acrylic modified epoxy resin, bisphenol F epoxy resin etc.
E-3. nickel filling material b2
Employed nickel (Ni) filling material is to use the nickel filling material of lepidiod nickel filling material and chain in electroconductive resin coating B." flakey " is meant the plain film shape, and " chain " is meant that meticulous nickel particle is interconnected to the shape of elongated chain (being similar to fine rule).Use these nickel filling materials can obtain the performance of electric conductivity and suitable die casting with the form of potpourri.
Usually, when die casting, can use pressure oil.Under following situation, promptly when pressing oil to occur as the lubricating film between sheet metal and the pressing mold, the precoating sheet metal can die casting, and without any problem.Yet, becoming dry if lubricating film is local, the surface of precoating sheet metal can produce dilatoryly and swipe.It is outstanding from the coated film surface that the nickel filling material also keeps, and therefore, if lubricating film becomes dry, the nickel filling material contacts with pressing mold, so that the product of die casting has relatively poor outward appearance.That is to say that it is very important making and remaining with pressure oil on the precoating sheet metal surface.Use above-mentioned two kinds of nickel filling materials with form of mixtures, the roughness on coated film surface is controlled suitably, press oil to remain with.
The nickel filling material of lepidiod nickel filling material and chain can mix with the ratio of total amount 10-70wt% (based on resin solid thing amount).If they are with less than 10% ratio, electroconductive resin coating B has the poor electric conductivity and the performance of suitable die casting.If they are with greater than 70% ratio, electroconductive resin coating B has excellent conducting performance, but has performance, adhesion property and the corrosion resistance of poor suitable die casting.
E-4. lubricant b3
With regard to employed lubricant b3 among the electroconductive resin coating B, can use a kind of or two kinds or more of lubricants that are selected from the group of following composition: Brazil wax, Tissuemat E and microcrystalline wax.Brazil wax is a kind of vegetable wax, mainly contains senior fatty ester, and fusing point is 78-86 ℃.With regard to Tissuemat E, can use molecular weight to be 600-12000, fusing point Tissuemat E as 70-140 ℃.Microcrystalline wax is a kind of crystalline wax that contains the microlite that obtains from petroleum component, and operable is that 600-900, fusing point are 60-100 ℃ microcrystalline wax just like molecular weight.
These lubricants b3 provides the coated film surface with greasy property when being shaped as die casting, to improve the scraping resistance of coated film.
Lubricant b3 can 1-5wt% (based on resin solid thing amount) ratio mix.If it is less than 1wt%, electroconductive resin coating B has poor greasy property, thereby trends towards making coated film A to be swiped.If it surpasses 5wt%, the electroconductive resin coating has good greasy property, and therefore, the precoating sheet metal can slide into can not one-tenth dish (when rolling), so that can not be folded.
E-5. adjuvant
For the coating material that is used for forming electroconductive resin coating B in the present invention, can add levelling agent, anti-explosion adjuvant, stabilizing agent, anti-heavy auxiliary agent etc.In order to obtain the desired common performance of coating performance and precoated material, normal these adjuvants that use in common coating material.
E-6. form electroconductive resin coating B
Coating material can prepare in the following manner, promptly uses base resin b1, nickel filling material a2 and lubricant b3 as solvent, adds an amount of above-mentioned adjuvant, these dissolvings or be dispersed in the suitable solvent.This coating material can directly be coated on another chemical conversion coating with coating roller, then handles described a period of time in the baking oven that keeps described temperature, toasts and drying.The top feeder system is preferred.In this system, coating material is the part that is fed to from top between material roller and the coating roll, and this coating material is to be applied on the sheet metal by roller coating technology with coating roll.The mode that coating material also can be coated with machine with the similar bar shaped of air atomizer, replacement coating roller applies.With regard to solvent, can use a kind of solvent of in " C-10. forms coated film " part, being given an example.
E-7. electric conductivity
Electroconductive resin coating B can have following specific electric conductivity, and promptly when silver-colored probe (use diameter as 5mm and have the probe at 2.5mmR tip) came in contact with coating surface under by the load of four-point method at 100g, its resistance Er was 10 Ω or littler.If Er surpasses 10 Ω, can not obtain the needed electrical property of driver box outer surfac such as ground connection performance and magnetic shield performance fully.
F. dispel the heat and electroconductive resin coating C
The precoating sheet metal can be formed like this, promptly on coated film A opposed outer surface, provides the heat radiation and the electroconductive resin coating C that replace electroconductive resin coating B.In this case, other chemical conversion coating can be provided on sheet metal, form outer surface on the one side of this sheet metal, this outer surface is on the face relative with coated film A, and resinous coat C is formed on this outer surface, and this resinous coat C obtains heat radiation and electric conductivity.
The resinous coat C of this heat radiation and conduction is to use a kind of or two kinds or more of resin resins as base resin c1 to form, and this resin is the group that is selected from following composition: fluorine-containing series plastics, epoxy series plastics, polyester series resin, oleic series resin and polyurethane series resin.It comprises graphite (in order to provide coating with heat dispersion) at least and comprises nickel filling material (in order to provide coating with electric conductivity) at least.With regard to the polyester series resin, can use as the oleic series resin of base resin c1 and epoxy series plastics and with the identical resin of example resin of employed base resin a1 in coated film A.With regard to regard to the fluorine-containing series plastics and polyurethane series resin of base resin c1, can use the identical resin of example resin with employed resin bead a2 in coated film A.
Provide the ratio that the component of electric conductivity such as nickel filling material can 10-70wt% (based on resin solid thing amount) to mix.If it is less than 10wt%, resinous coat C has the poor electric conductivity and the performance of suitable die casting.If it is greater than 70wt%, resinous coat C has excellent conducting performance, but has performance, adhesion property and the corrosion resistance of poor suitable die casting.As for component that heat radiation is provided such as graphite, the ratio that it can 20-100wt% (based on resin solid thing amount) is mixed.If it is less than 20wt%, resinous coat C has poor heat dispersion.If it is greater than 100wt%, resinous coat C has good performance of heat dissipation, but has the performance of poor suitable die casting.
The thickness that this heat radiation and conductive resin layer C are preferably formed is 0.3 μ m-5 μ m.
F. heat dispersion and electric conductivity
Heat radiation and electroconductive resin coating C can have the electric conductivity of following qualification, promptly when silver-colored probe (use diameter as 5mm and have the probe at 2.5mmR tip) came in contact with coating surface under by the load of four-point method (Four-terminal) at 100g, its resistance Er was 10 Ω or littler.If Er surpasses 10 Ω, can not obtain the needed electrical property of driver box outer surfac such as ground connection performance and magnetic shield performance fully.
With regard to the heat dispersion of heat radiation and electroconductive resin coating C, it is restricted to following heat dispersion, promptly when the state that is placed on driver box inside at light source issues bright dipping and produces heat, driving the moment that the box temperature inside is in steady state (SS), the temperature on driver box surface is 32 ℃.If the temperature on driver box surface surpasses 32 ℃, heat can accumulate in the driver box, destroys the key property of electronic equipment.
Should dispel the heat and electroconductive resin coating C, can use by coated with the following formed coated film of coating material, this coating material is to prepare by admixed graphite in a kind of organic resin and nickel filling material, as disclosed in the flat No.2005-305993 of Japanese Patent Application Laid-Open.
The precoating sheet metal (above describe in detail) that is used for slot-in drive is to be used for electrical equipment and electronic equipment as (but not only being limited to this) TV, the logging machine of videocassette and the slot-in drive box of personal computer.The slot-in drive box that can also be used for structure.Precoating sheet metal of the present invention has the anti-scraping performance of CD as (but not only being limited to these CDs) CD (CD) and DVD (digital video disk).It can also be used for anti-scraping purpose, the various members such as the magneto-optic disk of accurate treatment surface are arranged.
Embodiment
The present invention is following to describe the present invention in further detail by providing embodiment.
Embodiment 1-9
Each all is used as sheet metal aluminum alloy sheet.Each aluminum alloy sheet (material: TIS A5052, sheet thickness: 0.6mm) carry out decontamination on its two sides and handle, then wash with water with the aluminium soil release agent of buying.After this, handled phosphoric acid chromaking Treatment Solution with purchase carried out the chemical conversion processing on its two sides.Then, each chemical conversion treatment surface B uses coating material b (as shown in table 1) to apply by the mode that bar shaped is coated with machine, then baking.Simultaneously, other chemical conversion treatment surface A uses the undercoat material of being made up of the polyester series resin to apply, then baking, and the formed primer thickness of this baking control is 10 μ m (baking backs).Then, on formed bottom, the coating material a (as shown in table 1) that includes base resin, resin bead and lubricant is coated with the machine mode by bar shaped and applies, and then baking is to prepare each sample.The baking of coating material b, coating material a and undercoat material all is to carry out under 230 ℃ of temperature (as the ultimate treatment temperature (PMT) of maximum).The specimen preparation condition of embodiment 1-9 is as shown in table 1.Comparative examples 1-8
The sample of comparative examples 1-8 is with the employed same way as of embodiment 1-9, still prepares under preparation condition as shown in table 2.
Embodiment 14-15
In embodiment 14, stainless steel substrates is as sheet metal.In embodiment 15, the spelter coating sheet metal is as sheet metal.These sheet metals carry out chemical conversion with the chromaking Treatment Solution of buying to be handled on its two sides.Then, chemical conversion treatment surface B each use heat radiation and electroconductive resin coating material (being made up of polyester series resin, graphite and nickel filling material) to apply by the mode that bar shaped is coated with machine, and obtaining coated film thickness is 1 μ m (baking back), then baking.In this coating material, the content of graphite and nickel filling material is respectively 30wt% and 40wt% (based on the amount of resin solid thing).
Simultaneously, other chemical conversion treatment surface A each use the undercoat material of being made up of the polyester series resin to apply, then baking, and the formed primer thickness of this baking control is 10 μ m (baking backs).Then, on formed each bottom, the coating material a (as shown in table 3) that includes base resin, resin bead and lubricant is coated with the machine mode by bar shaped and applies, and then baking is to prepare each sample.The baking of coating material b and undercoat material all is to carry out under 230 ℃ of temperature (as the highest ultimate treatment temperature (PMT)).The preparation condition of embodiment 14 and embodiment 15 is as shown in table 3.
By the above mode, preparation is used for the precoating sheet metal of slot-in drive box, and each prepared sheet metal as shown in Figure 1.In Fig. 1, numeral 1 expression electroconductive resin coating or heat radiation and the electroconductive resin coating that relates to; Numeral 2 expression chemical conversion coatings; Numeral 3 expression sheet metal such as aluminum alloy sheets; Numeral 4 expression undercoats; Numeral 5 expression coated film; Numeral 6 expression resin bead.
The chromium content of each chemical conversion coating is 30mg/m
2(measuring) with fluorescent X-ray analysis instrument.
As for embodiment 14 and embodiment 15, the slot-in drive box is to produce in such a way, and measures the surface temperature of each driver box.That is to say that the B surface of each precoating sheet metal is outside, the A surface of each precoating sheet metal inwardly produces the slot-in drive box, and its bottom and top dimension are 150mm * 150mm, highly are 100mm.The 60W bulb is placed on driver box the inside as light source, and bulb is luminous, and produces heat.When the internal temperature of driver box tends towards stability state, inscribe, measure the temperature on driver box surface.As a result of, temperature is 32 ℃ under steady state (SS).
As for embodiment 1-9, embodiment 14 and 15 and comparative examples 1-8 in prepared precoating sheet metal, come the disperse state (resin bead how to keep distribute) of measure surface roughness, greasy property and resin bead in such a way.The anti-scraping of CD performance, friction resistant noise performance, elasticity, electric conductivity and corrosion resistivity are to assess as follows.Institute is evaluated as " SA ", " A " or " C " is accredited as and can accepts, and that " C " is accredited as is unacceptable (?).
Surfaceness:
On the A surface of each precoating sheet metal, the arithmetic mean irrelevance Ra of the profile of assessing and the mean breadth RSm of outline portion are by assessing with the measured surfaceness of probe quasi-instrument.
Smooth performance:
With regard to the A smoothness of the surface energy of each precoating sheet metal, the dynamic friction coefficient is with Bauden tester for friction between (Bauden rubbing tester) test.
The resin bead distribution:
The A surface of each precoating sheet metal is all observed down at optical microscope (amplifying 100 times), resin bead how to keep distributing be with every square millimeter comprise 35 or more the quantity of the reunion piece of resin bead assess.
The anti-scraping of CD performance:
Each precoating sheet metal is fixed on a kind of platen, and the A surface that makes the former upwards, and a CD and a load are carried on the precoating sheet metal further, and wherein, CD is horizontal slip on it, measures the maximum load weight that CD is not swiped.
SA:200g or more
A: from 150g or more to being less than 200g
B: from 100g or more to being less than 150g
C: be less than 150g
The friction resistant noise performance:
Each precoating sheet metal is fixed on a kind of platen, and the A surface that makes the former is upwards, when sliding in 3 ° inclination mode in its marginal portion at CD on the sheet metal, and any sound that assessment is produced.
A: hear that sound is slight
B: hear very little sound
C: hear very big sound
Elasticity:
Elasticity is by crooked each precoating sheet metal 180 degree and make its A surface to external assessment according to JIS Z 2248.Two unprocessed sheet metals (gross thickness is 1.2mm) are as crooked liner, and the outward appearance of sweep can visual observation.
A: do not observe coated film and break
B: observe coated film and break
Electric conductivity:
When the B surface of silver-colored probe (use diameter as 5mm and have the probe at 2.5mmR tip) by four-point method and each precoating sheet metal comes in contact, test resistance Er.
A:10 Ω or littler
B: surpass 10 Ω
Corrosion resistance:
On the B surface of each precoating sheet metal, carry out crosscut, and the outward appearance of visual observation sheet metal was carried out in the test of spraying salt 100 hours.
A: do not observe corrosion
B: observe corrosion
Embodiment 1-9, embodiment 14 and 15 and the above-mentioned test result of comparative example 1-8 as shown in table 4.
Embodiment 1-9,14, each precoating sheet metal of 15 all has coated film A on their A surface, this coated film is to form like this: resin bead a2 and lubricant are added among the base resin a1, wherein, resin bead a2 is the group that is selected from following composition: nylon series plastics pearl, fluorine-containing series plastics pearl and polyurethane series resin bead, lubricant a3 is the group that is selected from following composition: Brazil wax, Tissuemat E and microcrystalline wax, base resin a1 is the group that is selected from following composition: the polyester series resin, epoxy series plastics and oleic series resin, and the arithmetic mean irrelevance of the profile of assessing is 0.3-4.5 μ m, the mean breadth RSm of outline portion is 105-280 μ m, and wherein the mean grain size of resin bead a2 is 2.0-3.0 to the ratio of coating thickness β.When using this coated film, it is as shown in the table for the result who is obtained.In these precoating sheet metals, obtain good CD anti-scraping performance and friction resistant noise performance.In all embodiment and comparative examples, do not observe coated film and break, demonstrate the excellent in vending workability energy.
Each has the electroconductive resin coating on their B surface the precoating sheet metal of embodiment 1-9, this coating is a kind of by the formed resinous coat of applying coating material, this coating material comprises base resin b1 and (is selected from the group of following composition: the polyester series resin, the epoxy series plastics, the oleic series resin), nickel filling material b2 (the nickel filling material that comprises lepidiod nickel filling material and chain, it is to mix with the solid amount of 10-70%), and lubricant b3 (is selected from the group of following composition: Tissuemat E, Brazil wax and microcrystalline wax, it is to mix with the 1-5wt% based on the solid amount).The dry coating film thickness of electroconductive resin coating B is 0.2-2.0 μ m.Therefore, this coated film B has produced good corrosion resistance and electric conductivity.
Each precoating sheet metal among the embodiment 14 and 15 has heat radiation and electroconductive resin coating C on their B surface, this coating contains polyester series resin as base resin c1, as the graphite of heat sink material c2 and as the nickel filling material of conductive material c3.Therefore, this coating C has produced good anticorrosive and electric conductivity.
In comparative examples 1, on the A surface of precoating sheet metal, do not use polyester series resin, epoxy series plastics and oleic series resin as base resin a1.Therefore, the precoating sheet metal has the anti-scraping of poor CD performance.And the B surface of precoating sheet metal does not cover the electroconductive resin coating, and therefore, the precoating sheet metal has poor corrosion resistance.
In comparative examples 2, on the A surface of precoating sheet metal, do not use nylon series plastics pearl, fluorine-containing series plastics pearl and polyurethane series resin bead as resin bead a2.Therefore, the precoating sheet metal has the anti-scraping of poor CD performance.And, do not comprise the nickel filling material in the lip-deep electroconductive resin coating of precoating sheet metal B, therefore, the precoating sheet metal has poor electric conductivity.
In comparative examples 3, on the A surface of precoating sheet metal, do not use Brazil wax, Tissuemat E and microcrystalline wax as lubricant b3, therefore, the precoating sheet metal has the anti-scraping of poor CD performance.And, be less than based on 10% of resin solid thing amount in the amount of nickel filling material in the lip-deep electroconductive resin coating of precoating sheet metal B, therefore, the precoating sheet metal has poor electric conductivity.
In embodiment 4, the arithmetic mean irrelevance Ra of the profile of assessing on the A surface of precoating sheet metal surpasses 4.5 μ m, and therefore, the precoating sheet metal has poor friction resistant noise performance.And in the lip-deep electroconductive resin coating of the B of precoating sheet metal, the amount of nickel filling material surpasses based on 70% of resin solid amount, and therefore, the precoating sheet metal has poor corrosion resistance.
In comparative examples 5, the arithmetic mean width Ra that is assessed on precoating sheet metal A surface is less than 0.3 μ m, and therefore, the precoating sheet metal has the anti-scraping of poor CD performance.And less than 0.2 μ m, therefore, the precoating sheet metal has poor corrosion resistance at the thickness of the lip-deep electroconductive resin coating of precoating sheet metal B.
In comparative examples 6, the outline portion mean breadth RSm on precoating sheet metal A surface surpasses 280 μ m, and therefore, the precoating sheet metal has poor friction resistant noise performance.And, surpass 2.0 μ m at the thickness of the lip-deep electroconductive resin coating of precoating sheet metal B, therefore, the precoating sheet metal has poor electric conductivity.
In comparative examples 7, the mean grain size of resin bead surpasses 3.0 to the ratio at the lip-deep coated film layer thickness of precoating sheet metal A, and therefore, the precoating sheet metal has poor CD anti-scraping performance and friction resistant noise performance.And the amount of the nickel filling material in the lip-deep electroconductive resin coating of precoating sheet metal B is less than based on 10% of resin solid amount, and therefore, the precoating sheet metal has poor electric conductivity.
In comparative examples 8, the mean grain size of resin bead at the ratio of the lip-deep coated film thickness of precoating sheet metal A less than 2.0, therefore, the precoating sheet metal has the anti-performance that scrapes of poor CD.And the amount of the nickel filling material on the lip-deep electroconductive resin coating of precoating sheet metal B surpasses based on 70% of resin solid amount, and therefore, the precoating sheet metal has poor corrosion resistance.
Embodiment 10-13,16-28 and comparative examples 9-19
Test and prepare the sample of embodiment 10-13 and embodiment 16-28 in mode identical in embodiment 1-9.To test and to prepare the sample of comparative examples 9-19 with mode identical in comparative examples 1-8.The specimen preparation condition of embodiment 10-13, embodiment 18-28 and comparative examples 9-19 is as shown in table 5, and its result is as shown in table 6.
Each precoating sheet metal of embodiment 1-13 and 16-28 all has coated film A on their A surface, this coated film is to form like this: polyester series resin bead and lubricant a3 add among the base resin a1, wherein, lubricant a3 is selected from the group that Brazil wax, Tissuemat E and microcrystalline wax are formed; Base resin a1 is the group that is selected from following composition: polyester series resin, epoxy series plastics and oleic series resin.And the arithmetic mean irrelevance Ra of the profile of assessing of coated film A is 1.0-2.5 μ m, and the mean breadth RSm of outline portion is 105-250 μ m, and wherein the mean grain size of resin bead a2 is 2.0-3.0 to the ratio of coated film thickness β.When using this coated film, it is as shown in the table for the result who is obtained.In these precoating sheet metals, obtain the anti-scraping of good CD performance, friction resistant noise performance and elastic performance.In embodiment 10-12,16-18,24-28, obtain excellent especially anti-scraping performance, this is because Ra and RSm satisfy the relation of above-mentioned equation (1).
In comparative examples 9, the arithmetic mean width Ra that is assessed on precoating sheet metal A surface is greater than 2.5 μ m, and the mean breadth RSm of outline portion is less than 105 μ m, and therefore, the precoating sheet metal has poor CD anti-scraping performance and friction resistant noise performance.And in the lip-deep electroconductive resin coating of precoating sheet metal B, the content of nickel filling material surpasses 70% solid resin amount, and therefore, the precoating sheet metal has poor corrosion resistance.
In comparative examples 10, the arithmetic mean irrelevance Ra of the profile of assessing on precoating sheet metal A surface is less than 1.0 μ m, and the mean breadth RSm of outline portion surpasses 250 μ m, and therefore, the precoating sheet metal has poor anti-scraping performance and friction resistant noise performance.And in the lip-deep electroconductive resin coating of precoating sheet metal B, the amount of nickel filling material surpasses based on 70% of resin solid amount, and therefore, the precoating sheet metal has poor corrosion resistance.
In comparative examples 11-13, the mean breadth RSm of the outline portion on precoating sheet metal A surface is less than 105 μ m, and therefore, the precoating sheet metal has the anti-scraping of poor CD performance.And greater than 2.0 μ m, therefore, the precoating sheet metal has poor electric conductivity at the thickness of the lip-deep electroconductive resin coating of precoating sheet metal B.
In comparative examples 14 and 15, the arithmetic mean irrelevance Ra of the profile of assessing on precoating sheet metal A surface is less than 1.0 μ m, and therefore, the precoating sheet metal has the anti-scraping of poor CD performance.And greater than 2.0 μ m, therefore, the precoating sheet metal has poor electric conductivity at the thickness of the lip-deep electroconductive resin coating of precoating sheet metal B.
In comparative examples 16 and 17, the arithmetic mean irrelevance Ra of the profile of assessing on precoating sheet metal A surface surpasses 2.5 μ m, and therefore, the precoating sheet metal has poor friction resistant noise performance.And greater than 2.0 μ m, therefore, the precoating sheet metal has poor electric conductivity at the thickness of the lip-deep electroconductive resin coating of precoating sheet metal B.
In comparative examples 18 and 19, the mean breadth RSm of the outline portion on precoating sheet metal A surface is greater than 250 μ m, and therefore, the precoating sheet metal has poor friction resistant noise performance.And greater than 2.0 μ m, therefore, the precoating sheet metal has poor electric conductivity at the thickness of the lip-deep electroconductive resin coating of precoating sheet metal B.
The commercial Application possibility
A kind of precoating sheet metal is provided, and this precoating sheet metal is the precoating sheet metal for the slot-in drive box, It has excellent CD Anti-scratching performance, and only produces very little friction noise; When it is folded, protect Demonstrate,prove the good performance of rolling, and guarantee excellent productivity ratio and low production cost; Sliding further Moving aspect of performance does not have non-homogeneous.
Claims (7)
1. precoating sheet metal that is used for the slot-in drive box comprises:
Sheet metal;
Formed chemical conversion coating on the two sides of sheet metal;
Formed coated film A on one of chemical conversion coating, this coated film A contains: at least a base resin a1 that is selected from the group of being made up of polyester series resin, epoxy series plastics and acryl resin, at least a resin bead a2 that is selected from the following group of being formed by nylon series plastics pearl, fluorine-containing series plastics pearl and polyurethane series plastics pearl, at least a lubricant a3 that is selected from the group of forming by Brazil wax, Tissuemat E and microcrystalline wax;
On the surface of every square millimeter of described coated film A, occur by 35 or 4 or reunion piece still less that more resin bead a2 formed;
The dynamic friction coefficient of described coated film A is smaller or equal to 0.15;
The thickness of described coated film A is 4～20 μ m;
The mean grain size Pd of resin bead a2 is 5～40 μ m;
Based on the weight of the base resin a1 of described coated film A, the content of resin bead a2 is 3～20wt%;
Based on the weight of the base resin a1 of described coated film A, the content of lubricant a3 is 0.2～10wt%;
Described coated film A has following surface, the arithmetic average deviation Ra of the profile of assessing on this surface is 0.3-4.5 μ m, the mean breadth RSm of outline portion is 105-280 μ m, and the mean grain size of resin bead a2 is 2.0-3.0 to the ratio of the coated film thickness of coated film A.
2. precoating sheet metal according to claim 1, wherein, described resin bead a2 is a nylon series plastics pearl, and described coated film A has following surface, the arithmetic average deviation Ra of the profile of assessing on this surface is 3.0-4.5 μ m, and the mean breadth RSm of outline portion is 200-280 μ m.
3. precoating sheet metal according to claim 1, wherein, described resin bead a2 is fluorine-containing series plastics pearl, coated film A surface has the arithmetic average deviation R of the profile of assessing
aBe 0.3-0.6 μ m, the mean breadth RSm of outline portion is 200-220 μ m.
4. precoating sheet metal according to claim 1, wherein, described resin bead a2 is a polyurethane series plastics pearl, described coated film A has a kind of surface, the arithmetic average deviation R of the profile of being assessed on this surface
aBe 1.0-2.5 μ m, the mean breadth RSm of outline portion is 105-250 μ m.
5. precoating sheet metal according to claim 4, wherein, R
aFurther satisfy following relational expression: 200≤RSm+73 * R with RSm
a≤ 350.
6. according to each described precoating sheet metal of claim 1-5, wherein, the precoating sheet metal further comprises electroconductive resin coating B, described electroconductive resin coating B is the resinous coat that forms on another chemical conversion coating, and comprise: at least a base resin b1 that is selected from the group of being formed by polyester series resin, epoxy series plastics, oleic series resin, a kind of nickel filling material b2 that includes flakey nickel filling material and chain nickel filling material, and at least a lubricant b3 that is selected from the group of forming by Tissuemat E, Brazil wax and microcrystalline wax;
Wherein based on the solid substance quantity of base resin b1, the content of described filling material b2 is 10-70wt%, and based on resin solid thing amount, the content of described lubricant b3 is 1-5wt%;
Described electroconductive resin coating B has following electric conductivity, and when using diameter to come in contact with coating surface under by the load of four-point method at 100g as 5mm and silver-colored probe with 2.5mmR tip, the resistance Er of electroconductive resin coating B is 10 Ω or littler; And
The thickness of described electroconductive resin coating B is 0.2-2.0 μ m.
7. according to each described precoating sheet metal of claim 1-5, wherein, the precoating sheet metal further comprise heat radiation with the conduction resinous coat C, described resinous coat C is the resinous coat that forms on another described chemical conversion coating, and comprise: at least a base resin c1 that is selected from the group of being formed by fluorine-containing series plastics, epoxy series plastics, polyester series resin, oleic series resin and polyurethane series plastics, at least comprise the material c2 of a kind of heat radiation of graphite, and the material c3 that comprises a kind of a kind of conduction of nickel filling material at least;
The component that electric conductivity is provided in resinous coat C is 10-70wt% with respect to the ratio of resin solid thing weight;
The component that heat radiation is provided in resinous coat C is 20-100wt% with respect to the ratio of resin solid thing weight;
Described resinous coat C has following electric conductivity, and when using diameter to come in contact with coating surface under by the load of four-point method at 100g as 5mm and silver-colored probe with 2.5mmR tip, the resistance Er of the resinous coat C of heat radiation and conduction is 10 Ω or littler.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005337490 | 2005-11-22 | ||
| JP2005337490 | 2005-11-22 | ||
| JP2006306221 | 2006-11-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1971752A CN1971752A (en) | 2007-05-30 |
| CN100585722C true CN100585722C (en) | 2010-01-27 |
Family
ID=38112507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610149496A Expired - Fee Related CN100585722C (en) | 2005-11-22 | 2006-11-21 | The precoating sheet metal that is used for the slot-in drive box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100585722C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4091963B1 (en) * | 2007-01-12 | 2008-05-28 | 古河スカイ株式会社 | Resin-coated aluminum alloy sheet for aluminum electrolytic capacitor case, aluminum electrolytic capacitor case, aluminum electrolytic capacitor |
| CN101518969B (en) * | 2008-04-15 | 2012-10-31 | 上海网讯新材料科技股份有限公司 | Honed smooth metallic plastic cladding strip |
| JP5079037B2 (en) * | 2010-02-26 | 2012-11-21 | 住友軽金属工業株式会社 | Conductive pre-coated aluminum alloy plate for electrical or electronic equipment housing |
| JP2017115135A (en) * | 2015-12-11 | 2017-06-29 | 株式会社リコー | Slide member, component and method for reducing noise of mechanical device |
| CN117282644A (en) * | 2023-09-04 | 2023-12-26 | 中国地质大学（武汉） | Lubricating coating based on natural wax molecule and siloxane polymer molecule composite, and preparation method and application thereof |
-
2006
- 2006-11-21 CN CN200610149496A patent/CN100585722C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1971752A (en) | 2007-05-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100585722C (en) | The precoating sheet metal that is used for the slot-in drive box | |
| TWI401157B (en) | Pre-coated metal sheet for slot-in drive cases | |
| CN104216032B (en) | Anti-dazzle hardness film coating | |
| CN104216033B (en) | Anti-dazzle hardness film coating | |
| EP3473430B1 (en) | Thermally conductive thin film sheet and article comprising same | |
| CN105764688A (en) | Plastic film laminate | |
| CN101679825A (en) | Composition for anti-glare film and anti-glare film prepared using the same | |
| CN1659216A (en) | Laminated polyester film and laminated film | |
| CN103403073A (en) | Hardcoat | |
| TW200420977A (en) | Optical film for display devices | |
| JP4448511B2 (en) | Pre-coated metal plate and method for producing pre-coated metal plate | |
| JP2012086419A (en) | Laminate body and method for manufacturing the same | |
| TW200535448A (en) | Low reflection member | |
| CN105829451B (en) | Resin combination, resin sheet and resin laminate | |
| WO2015151892A1 (en) | Photosensitive conductive paste, conductive thin film, electrical circuit and touch panel | |
| JP2009126105A (en) | Pre-coated metal plate and method of manufacturing the same | |
| Kasisomayajula et al. | Investigation on mechanical and conductive properties of polypyrrole/UV cured acrylate nanocomposite coatings | |
| JP2010005545A (en) | Precoated metallic plate for electronic/electrical equipment | |
| KR20120089936A (en) | Resin coating compositions and its coated steel sheet with high press formability, and blocking and sticking resistance | |
| Salehi et al. | Micro powder poly lactic acid/carbon black composite as a bio printing ink | |
| KR20100074354A (en) | Light-diffusing film for back light unit of lcd and manufacturing method thereof | |
| JP3875985B2 (en) | Scratch resistant pre-coated metal plate | |
| JP2008036847A (en) | Precoated metal sheet excellent in damage resistance and conductivity | |
| CN101544084A (en) | Scratch-resistant resin plate and display window protecting plate of portable information terminal using the same | |
| JP2010228279A (en) | Precoated aluminum alloy sheet for casing of electric and electronic equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100127 Termination date: 20201121 |