CN1058444C - Light blocking film - Google Patents
Light blocking film Download PDFInfo
- Publication number
- CN1058444C CN1058444C CN95104510A CN95104510A CN1058444C CN 1058444 C CN1058444 C CN 1058444C CN 95104510 A CN95104510 A CN 95104510A CN 95104510 A CN95104510 A CN 95104510A CN 1058444 C CN1058444 C CN 1058444C
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- China
- Prior art keywords
- resin
- shading
- lubricant
- organic filler
- carbon black
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- Expired - Lifetime
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- Diaphragms For Cameras (AREA)
Abstract
To provide a shading film which is excellent in shading property, slidability, conductivity, and surface grinding property, and is suitable as a shutter, an iris diaphragm, etc., for optical equipment by providing a base material film with a shading layer consisting of a specified material. A shading layer consisting of binder resin, black fine powder 1mum or under in average grain diameter, an organic filter 0.5-10mum in average grain diameter, and a sliding agent 0.1-10mum in average grain diameter is provided on at least one side of a base material film. As the binder resin, setting resin, which shows hardening property by heat, light, etc., or thermoplastic resin, or the like is used. The content of the binder resin is 25-26wt.% to the total weight of the binder resin, the carbon black, the organic filter, and the sliding agent among the shading layer, and the content of the black fine powder is 10-20wt.%, and the organic filler is 20-40wt.%, and the sliding agent is 5-15wt.%. Hereby, a shading member for optical equipment, where the balance between shading property, conductivity, surface grinding property, and slidability is taken, can be gotten.
Description
The present invention relates to a kind of light blocking film, it is suitable for use as the resistance optical element, for example is used as the shadow shield or the shutter of optical instrument such as camera or video camera.
Along with the development of pocket, light-duty camera or video camera recently, small and exquisite, lightweight element demand is constantly increased.Therefore, the shutter of synthetic resin and shadow shield have replaced metalwork now.A kind of known resistance light compositing resin molding is the polyester film of carbon black, and the noisy processing of spray alligatoring (unexamined Japanese patent application 1-12503 number) is all used on its two sides.This known light blocking film is owing to the surface of alligatoring is easy to be polished go wrong during use.Also have, owing to must use a large amount of carbon blacks could obtain satisfied light-proofness, so the physics of plastic foil and mechanical property degenerate.
Japan opens public not unexamined patent application and has described a kind of light blocking film 4-9802 number, and this film contains the thermoset resin layer on a kind of synthetic resin substrate and this substrate two sides, and wherein each resin bed all contains carbon black and lubricant.But, because used lubricant, this known photomask easily becomes glossy.Therefore,, be and improve mattness, be necessary to strengthen the particle diameter of carbon black and lubricant for reducing gloss.But this can cause the reduction of light-proofness.
Therefore, an object of the present invention is to provide a kind of light blocking film, it has good resistance photosensitiveness, sliding, electric conductivity and mattness, thereby it can be used for making the part of shutter, shadow shield of optical instrument or the like.
According to the present invention, the light blocking film that is provided comprises basement membrane and shading layer, this shading layer is attached on the above-mentioned basement membrane one side at least, and contain 25-65% (weight) adhesive resin, 10-20% (weight) average grain diameter is not more than 1 micron carbon black, the organic filler of 20-40% (weight) average grain diameter 0.5-10 micron, and 5-15% (weight) average grain diameter is the lubricant of 0.1-10 micron, described organic filler is selected from least a in filler of following that group: the benzoguanamine resin, styrene resin, urea/formaldehyde resin, benzoguanamine/urea/formaldehyde condensation products and benzoguanamine/melamine/formaldehyde condensation products, described lubricant are selected from least a in lubricant of following that group: polyolefin, the aliphatic acid that has 16 carbon atoms at least, the higher alcohol that has 16 carbon atoms at least, molybdenum bisuphide, silicone resin and fluorocarbon polymer.
Describe the present invention below in detail.
Any synthetic resin film can be used as matrix.The example of the synthetic resin film that is suitable for comprises: polyester resin film, polycarbonate resin adipose membrane, polystyrene resin film and polyimide resin film.The preferred especially film that uses a kind of polyester such as polyethylene terephthalate to make.The thickness of synthetic resin film matrix is generally the 25-190 micron, preferred 50-125 micron.Matrix can comprise a kind of black resistance stimulative substance, carbon black for example, or any other contains the pigment that symbol requires.If requirement also can be made matrix with foam sheet.Matrix can be through surface treatment, and for example, Corona discharge Treatment, tackified finish or bottom layer treatment are so that improve adhesion between matrix and the shading layer attached to it.
The shading layer that is attached on the matrix comprises adhesive resin, carbon black, organic filler and lubricant.
Adhesive resin can be a kind of thermoplastic resin or thermosetting or photo-curable resin.What preferably use is thermosetting resin, for example acrylic resin, polyurethane resin, phenolic resin, formaldehyde resin, urea resin, diaryl phthalic acid ester resin, mylar, epoxy resin or alkyd resins.These resins can use separately, but or two or more be used in combination.Preferably especially use heat cured acrylic resin, because of its adhesion and mechanical strength to matrix good.The example of the thermoplastic resin that is suitable for has: thermoplastic acrylic resin, vinyl chloride resin, butyral resin and styrene/butadiene copolymers resin.The consumption of adhesive resin is as the criterion in adhesive resin, carbon black, organic filler and lubricant gross weight, is 25-65% (weight), is preferably 35-55% (weight).The adhesive resin consumption can make adhesion decline between matrix and the shading layer less than 25% (weight).On the other hand, binder dosage is too big, surpasses 65% (weight), then is difficult to obtain whole desired performances.
Importantly, the average grain diameter of carbon black should be 1 micron or littler, otherwise the resistance photosensitiveness can not be satisfactory.Preferred black grain diameter is 0.5 micron or littler.Gross weight in adhesive resin, carbon black, organic filler and lubricant is as the criterion, and the consumption of carbon black is 10-20% (weight), preferred 12-18% (weight).The carbon black consumption is less than 10% (weight), and resistance photosensitiveness and electrical conductance are reduced.On the other hand, the carbon black consumption is too big, surpasses 20% (when weighing), can reduce tarnish and increase cost.
Organic filler is selected from benzoguanamine resin, styrene resin, urea/formaldehyde resin, benzoguanamine/urea/formaldehyde condensation products and benzoguanamine/melamine/formaldehyde condensation products.These resins can use separately, but or two or more be used in combination.Especially preferentially select benzoguanamine, melamine and formaldehyde product for use through the condensation gained, because of its sliding and mat surface good.Organic filler is preferably circular, because its sliding height.Importantly, the average grain diameter of organic filler should be between the 0.5-10 micron.Particle diameter causes that greater than 10 microns the resistance photosensitiveness descends, and particle diameter then can not obtain desired tarnish less than 0.5 micron.Preferred particle diameter is the 1-5 micron.Gross weight in adhesive resin, carbon black, organic filler and lubricant is as the criterion, and the consumption of organic filler is 20-40% (weight), preferred 25-35% (weight).Organic filler consumption outside the above-mentioned specified scope can not get desired mattness and sliding.
Lubricant is selected from polyolefin, have the aliphatic acid of 16 carbon atoms at least, have higher alcohol, molybdenum bisuphide, silicone resin and the fluorocarbon polymer of 16 carbon atoms at least.Especially preferably use fluorocarbon resin, for example polytetrafluoroethylene (PTFE) and tetrafluoroethene and hexafluoropropylene copolymer resin are because it has higher sliding.Lubricant is preferably circular, because it has higher sliding and mattness.Importantly the average grain diameter of lubricant is the 0.1-10 micron.Particle diameter cause that sliding descends, and particle diameter then can not obtain desired tarnish less than 0.1 micron greater than 10 microns.Gross weight in adhesive resin, carbon black, organic filler and lubricant is as the criterion, and preferred particle diameter is the 0.15-5 micron.The consumption of lubricant is 5-15% (weight), preferred 7-13% (weight), and the lubricant quantity outside the afore mentioned rules scope can not obtain desired tarnish and sliding.
The method that shading layer can adopt coating to contain the masking liquid of above-mentioned adhesive resin, carbon black, organic filler and lubricant forms on matrix.The mixture of water, organic solvent or water and a kind of organic solvent can be as the decentralized medium that forms this masking liquid.Adhesive resin can be dissolved in or be scattered in this dispersant.
If requirement, shading layer can be made sandwich construction.For example, shading layer can have two-layer structure, constitute by skin that contains adhesive resin and lubricant and the internal layer that contains adhesive resin, carbon black and organic filler, perhaps has three layers structure, by the skin that contains adhesive resin and lubricant, contain the intermediate layer of adhesive resin and carbon black, and the lower floor that contains adhesive resin and organic filler constitutes.Owing to the existence that lubricant is arranged at skin, the sliding of shading layer has improved.In this sandwich construction, the relative consumption of each composition identical with in single layer structure.
In general, the thickness of shading layer is the 2-30 micron.When light blocking film was used as the shutter of camera, the thickness of photoresist layer was generally the 3-20 micron, preferred 5-15 micron.
Further specify the present invention with embodiment below.Umber and percentage are all by weight.
Embodiment 1
Respectively be coated with one deck saturated polyester resin (trade name: Bylon is made by Toyo Boseki Co., Ltd.) bottom (thickness: 1 micron) in the two sides of the polyester film (thickness: 50 microns) that is used as matrix, carbon black.Then, the coating fluid that will have following composition is coated on every layer of bottom, and 100 ℃ of dryings 3 minutes, forms the shading layer of 10 microns of thickness on bottom.The gross thickness of the resistance light stack membrane that obtains like this is 72 microns.The composition of coating fluid:
Acrylic emulsion (
*1) 29.3 parts,
Carbon black (
*2) 12.2 parts,
Organic filler (
*3) 9.0 parts,
Lubricant (
*4) 5.6 parts,
43.8 parts of ion exchange waters.
*1: the thermoset acrylics emulsion, trade name: Movinyl 767, by
Hoechst Synthesis Co., Ltd makes, solids content:
46％；
*2: trade name: EP-510BLACK is made by DaiNichi Seika K.K,
Solids content 37%;
*3: benzoguanamine/melamine/formaldehyde resin, trade name: Epostar M30, by
Nippon Shokubai K.K makes;
*4: the fluorine resin emulsion, trade name: TEFLON FEP, by Mitsui-Du
Pont Inc makes, solids content: 54%.
Embodiment 2
Repeat embodiment 1 by above-mentioned identical mode, but the consumption of acrylic emulsion and organic filler is respectively 35.9 parts and 6.0 parts.
Embodiment 3
Repeat embodiment 1 by above-mentioned identical mode, but the consumption of acrylic emulsion, carbon black and lubricant is respectively 35.9 parts, 8.1 and 2.8 parts.
Embodiment 4
On each side of the carbon black polyester film (thickness: 50 microns) that is used as matrix, be coated with saturated polyester resin (trade name: Byron is made by Toyo Boseki K.K) bottom (thickness: 1 micron).Then, first kind of coating fluid that will have following composition is coated on each bottom, and 100 ℃ of dryings 2 minutes, on bottom, form one in the middle of shading layer, its thickness is 10 microns.Then, second kind of coating fluid that will have following composition is coated on each intermediate layer, and 100 ℃ of dryings 2 minutes, forms thickness and be 2 microns surface layer on the intermediate layer.The gross thickness of formed like this lamination light blocking film is 76 microns.The composition of first kind of coating fluid:
Acrylic emulsion (
*1) 32.6 parts,
Carbon black (
*2) 13.5 parts,
Organic filler (
*3) 10.0 parts,
43.9 parts of ion exchange waters.The composition of second kind of coating fluid:
Acrylic emulsion (
*1) 41.9 parts,
Lubricant (
*4) 3.3 parts,
54.8 parts of ion exchange waters.
* 1-*4: identical with preceding notes.
Comparative Examples 1
Repeat embodiment 1 by above-mentioned identical mode, but the consumption of acrylic emulsion, carbon black, organic filler and lubricant is 39.1 parts, 4.1 parts, 4.5 parts and 11.1 parts respectively.
Comparative Examples 2
Repeat embodiment 1 according to described same way as, but not with lubricator.
Comparative Examples 3
Repeat embodiment 1 according to described same way as, but without organic filler.
Comparative Examples 4
Repeat embodiment 1 according to described same way as, but not with lubricator and organic filler.
Comparative Examples 5
Polyester film (thickness: 75 microns) to carbon black carries out blasting treatment, with its both side surface of alligatoring, thereby obtains a kind of light blocking film.
Embodiment 1-3 and the test of Comparative Examples 1-5 gained light blocking film are hindered photosensitiveness, electric conductivity, sliding.The result shows as table 1.Method of testing is as follows:
The resistance photosensitiveness:
With a kind of photosensitive film (ASA speed: 3200) overlay on the tested film, then with 10
5The light of reining in passes tested film and shines it.By following grade, evaluate the resistance photosensitiveness of tested film with the speed of photosensitive film:
Best (light tight fully) 5
4
Good 3
Bad 2
Difference (printing opacity fully) 1
Electric conductivity:
Measure the surface resistivity (Ω) of tested film by JIS K-6911.
Mattness:
The gloss of tested film is pressed JIS Z-9741 and is measured.The result relatively is divided into 5 ratings, and wherein, the most glossiness sample is decided to be 1 grade, and the most lacklustre sample is decided to be 5 grades.
Sliding:
Measure the confficient of static friction of tested film by ASTM D-1984.The result relatively is divided into 5 ratings, wherein, has the sample of great friction coefficient to be decided to be 1 grade, and has the sample of minimum coefficient of friction to be decided to be 5 grades.
Table 1
Surface light blocking film resistance photosensitiveness electric conductivity sliding
Tarnish embodiment 15 10
655 embodiment 25 10
655 embodiment 35 10
655 embodiment 45 10
655 Comparative Examples 12 10
1025 Comparative Examples 25 10
651 Comparative Examples 35 10
613 Comparative Examples 45 10
611 Comparative Examples 55 10
1051
Claims (3)
1. light blocking film, it comprises a base film, with the shading layer at least one side of above-mentioned matrix, and this shading layer contains a kind of adhesive resin of 25-65% (weight), 10-20% (weight) average grain diameter is not more than 1 micron carbon black, 20-40% (weight) average grain diameter is the organic filler of 0.5-10 micron, 5-15% (weight) average grain diameter is a kind of lubricant of 0.1-10 micron, described organic filler is a kind of for what select from following at least: the benzoguanamine resin, styrene resin, urea/formaldehyde resin, benzoguanamine/urea/formaldehyde condensation products and benzoguanamine/melamine/formaldehyde condensation products, described lubricant is a kind of for what select from following at least: polyolefin, the aliphatic acid that has 16 carbon atoms at least has the higher alcohol of 16 carbon atoms at least, molybdenum bisuphide, silicone resin and fluorocarbon polymer.
2. according to the described a kind of light blocking film of claim 1, wherein, described shading layer is a double-decker, is made of the top layer of containing described adhesive resin and described lubricant and the bottom that contains described adhesive resin and described carbon black and described organic filler.
3. according to the described a kind of light blocking film of claim 1, wherein, described shading layer is a three-decker, by the top layer of containing described adhesive resin and described lubricant, contain the intermediate layer of described adhesive resin and described carbon black, and the bottom that contains described adhesive resin and described organic filler constitutes.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP85967/1994 | 1994-03-31 | ||
| JP85967/94 | 1994-03-31 | ||
| JP8596794 | 1994-03-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1118301A CN1118301A (en) | 1996-03-13 |
| CN1058444C true CN1058444C (en) | 2000-11-15 |
Family
ID=13873510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95104510A Expired - Lifetime CN1058444C (en) | 1994-03-31 | 1995-03-31 | Light blocking film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1058444C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012005147A1 (en) * | 2010-07-09 | 2012-01-12 | 株式会社 きもと | Light-blocking member for optical instrument |
| KR102046290B1 (en) * | 2011-03-28 | 2019-11-18 | 키모토 컴파니 리미티드 | Light-shielding material for optical equipment and manufacturing method thereof |
| JP6867793B2 (en) * | 2016-12-14 | 2021-05-12 | 株式会社きもと | Light-shielding sliding film, light-shielding sliding member, and resin composition for light-shielding sliding film |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49802A (en) * | 1972-04-17 | 1974-01-07 |
-
1995
- 1995-03-31 CN CN95104510A patent/CN1058444C/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49802A (en) * | 1972-04-17 | 1974-01-07 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1118301A (en) | 1996-03-13 |
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| 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 | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150331 Granted publication date: 20001115 |