CN101316722A - Printing blanket having improved dynamic thickness stability - Google Patents
Printing blanket having improved dynamic thickness stability Download PDFInfo
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- CN101316722A CN101316722A CNA2006800445013A CN200680044501A CN101316722A CN 101316722 A CN101316722 A CN 101316722A CN A2006800445013 A CNA2006800445013 A CN A2006800445013A CN 200680044501 A CN200680044501 A CN 200680044501A CN 101316722 A CN101316722 A CN 101316722A
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- printing plate
- tissue layer
- inserted rubber
- cloth inserted
- rubber printing
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Abstract
A printing blanket is provided which resists gauge loss throughout its useful life when subjected to printing nip pressures. The printing blanket includes a printing surface layer and at least one fabric ply. The fabric ply is treated by impregnation with a 100 % solids elastomeric urethane compound which penetrates the air spaces of individual fiber bundles in the fabric ply and fixes the individual fibers in the ply from relative movement so that that the blanket is resistant to permanent deformation. The blanket including the treated fabric ply retains at least 95% of its original gauge throughout its useful life.
Description
Technical field
The present invention relates to a kind of cloth inserted rubber printing plate, more specifically relate to a kind of cloth inserted rubber printing plate with improved dynamic thickness stability and anti-gauge loss.
Background technology
A kind of modal commercial printing technology is hectographic printing.In this typography, before being transferred on the stock of paper for example, China ink from the forme offset printing to the cloth inserted rubber printing plate that is installed in the rubber surface on the blanket cylinder.Usually, cloth inserted rubber printing plate is strengthened with a plurality of tissue layer and/or polymeric layer.
Be transferred to the step of texolite from forme and ink image is transferred to from cloth inserted rubber printing plate the step on the paper at ink image (inked image), it is very important keeping the tight contact between the corresponding contact surface.This normally the back-up roller by cylinder that texolite is covered and contact thereof be arranged such that between forms and determine to interfere and make texolite be compressed in whole service that certain depth realizes.But, the cloth inserted rubber printing plate that uses in the prior art tends to lose thickness (thickness of slab) when initial tensioning and installation at present, and along with texolite is subjected to interfering pressure repeatedly at cylinder and the place of the pressing portion between the back-up roller that printing cylinder, texolite cover, texolite also can further loss thickness.Owing to interfere the circulation repeatedly of pressure on the texolite surface, texolite can lose efficacy owing to the permanent deformation of the part on whole texolite surface or the wearing and tearing gradually of passing the texolite thickness of slab in time.
Attempted providing and to have resisted that thickness of slab is passed in time and the cloth inserted rubber printing plate that loses.For example, commonly assigned U.S. Patent No. 5,498,470 discloses a kind of cloth inserted rubber printing plate, and it comprises with the loss with the opposing thickness of slab of the tissue layer of elastomeric compounds dipping.But production process requires to use the dissolution with solvents elastomeric compounds earlier before dipping, so that elastomer liquefaction.
Hope improves the thickness of slab hold facility not needing to use under the situation of solvent, and the texolite operating characteristic of improving other.Therefore, still need to show the cloth inserted rubber printing plate structure and the manufacture method of improved opposing gauge loss ability in this area.
Summary of the invention
The present invention has satisfied above-mentioned needs, the invention provides a kind of cloth inserted rubber printing plate and manufacture method, comprises at least one tissue layer, and this tissue layer is with the 100% solid elastic material soaking that comprises polyurethane.Cloth inserted rubber printing plate can be resisted the gauge loss when being subjected to printing nip pressures in its whole service life, and shows good compression set type, hysteresis and resilience.
According to an aspect of the present invention, the cloth inserted rubber printing plate that provides a kind of anti-gauge loss ability to improve, it comprises printing top layer and at least one tissue layer, wherein by 100% solid elastic urethanes impregnate fabric layer was handled tissue layer, with opposing permanent deformation when being subjected to printing nip pressures.The meaning of " opposing permanent deformation " is that texolite keeps at least 95% of its original gauge in its whole service life.Usually, can comprise this service life and surpass 1,000,000 times printing.
Tissue layer can comprise woven fabric or non-woven fabric, inlaid thread fabric or cord.In one embodiment, cloth inserted rubber printing plate comprises at least two tissue layer, and wherein each tissue layer is all flooded with elastomeric urethane compound.
Cloth inserted rubber printing plate also can comprise compressible stratum.
Preferably, by using about 6g/m
2To about 205g/m
2100% solid elastic urethanes impregnate fabric layer handle one or more tissue layer.More preferably, with about 6g/m
2To about 125g/m
2Elastomeric urethane compound come the impregnate fabric layer.Tissue layer is flooded with elastomeric urethane compound, fixes and not relative motion in the air gap in each fibre bundle and with fiber so that polyurethane is penetrated in the tissue layer.Elastomeric compounds preferably includes cast urethane elastomer or thermoplastic polyurethane.
When elastomeric urethane compound comprised cast polyurethane, this polyurethane preferably was applied to tissue layer with liquid form, is cured then.When elastomeric compounds comprised thermoplastic polyurethane, this compound can apply with liquid form, or applied with the form membrane that is pressed onto on the fabric by thermosphere.Because polyurethane is used as 100% solid material, so just eliminated needs to solvent.
Therefore, feature of the present invention provides the cloth inserted rubber printing plate of a kind of use in the hectographic printing field, and this cloth inserted rubber printing plate can be resisted gauge loss when being subjected to printing nip pressures in its whole service life.By following description, accompanying drawing and claims, it is clearer that other features and advantages of the present invention will become.
Description of drawings
Fig. 1 is the perspective view of the fragment of cloth inserted rubber printing plate according to an embodiment of the invention, and wherein each layer partly cut.
The specific embodiment
With reference now to Fig. 1,, shows representative according to an embodiment of the invention cloth inserted rubber printing plate 10.This cloth inserted rubber printing plate comprises: bottom 12, and this bottom 12 comprises fabric or polymer sheet or film; One or more reinforcement tissue layer 14 and 16; And printing top layer 20.Tissue layer can comprise woven fabric, non-woven fabric, inlaid thread fabric or cord.Preferably, tissue layer is made up of woven fabric.As shown in the figure, tissue layer can be bonded together with traditional adhesive 13.
Cloth inserted rubber printing plate can also comprise the compressible stratum 18 that is formed by elastomeric material.This compressible stratum can be arranged between the reinforcement tissue layer, print between the following of top layer 20 or printing top layer and the fabric strengthening layer.
Printing top layer 20 is suitable for accepting the base map from printed panel, and can be made up of any suitable polymeric material, comprises natural rubber and synthetic resin.
Preferably, each layer tissue layer 12,14,16 all used 100% solid elastic urethanes dipping in the texolite.Even this elastomeric compounds should not be all also to be to be penetrated at least in part in the tissue layer in the air gap in each fibre bundle, and fiber is fixing to prevent relative motion.Preferably, the about 6g/cm of tissue layer
2To about 125g/cm
2Elastomeric urethane compound dipping.
Being used for the elastomeric compounds of impregnate fabric layer preferably pours into a mould elastic polyurethane or thermoplastic polyurethane.Have been found that and use this polyurethane because polyurethane can be used as 100% solid material, thereby not need solvent than using elastomeric compound that better effect is provided in the prior art.In addition, have been found that and use this urethanes to compare, make tissue layer have tensile strength, elongation, tear resistance and the wear resistence of improvement with use elastomeric compound in the prior art.
When elastomeric compounds comprises cast urethane elastomer, cast polyurethane is usually with the form supply of 100% solid material, it is heated to form liquid condition, is applied on the tissue layer by dip coated, spraying, reverse roll coating, blade coating or slit die coating then.Cast urethane elastomer is normally based on polyethers or polyester.The particular polyurethane that depends on use, curing mechanism can comprise heating, ultraviolet ray (UV) or moisturecuring.Usually, activate and/or quicken to solidify with heating.Be applicable to that cast urethane elastomer of the present invention comprises that those can be from CHEMTURA, the product that SIKA DEUTSCHLAND GMBH and ITWC, INC. buy.
When elastomeric compounds comprises thermoplastic polyurethane, this polyurethane provides with 100% solid material usually, it is melted and is applied on the fabric by extrusion coated or slit die coating as viscous liquid, or is applied on the fabric by heating, reverse roll coating.Alternately, thermoplastic polyurethane can be used as the zone of heating press mold and is applied on the tissue layer.Thermoplastic polyurethane does not need to solidify, because after in being impregnated into fabric, in case cooling also forms solid again, they are with regard to all physical characteristics.Be applicable to that thermoplastic polyurethane of the present invention comprises the thermoplastic polyurethane that those can buy from Huntsman Polyurethanes, Dow and Bayer.
No matter elastomeric compounds comprises cast polyurethane or comprises thermoplastic polyurethane, and the degree of dipping can be controlled by selection, liquid-state viscosity and the pressure of material.For example, tissue layer will allow to use less polyurethane material than loose tissue layer closely.The viscosity of liquid polyurethane can be controlled by batching and the temperature when applying.Can exert pressure and control dipping, for example, with coating apparatus or with follow-up pressure roll.Tissue layer preferably keeps tensioning in dipping process.
In order to be easier to understand the present invention, with reference to following Example, this example only is used to illustrate the present invention, rather than the restriction scope of the invention.
Example 1
To being added with polyurethane and not having the individual layer strengthening material of polyurethane and comprise that the sample of the cloth inserted rubber printing plate of two layers tests.Cloth inserted rubber printing plate only has a layer of fabric impregnated with urethane.Below table 1 show and add the improvement of polyurethane physical property.
Table 1
| Base material | Load (lbs/in., width, 0.2% strain) (no polyurethane) | Load (lbs/in., width, 0.2% strain) (polyurethane is arranged) |
| Texolite | 7.7 | 20.3 |
| Woven bafta | 5.9 | 34.1 |
| Polyester textile | 8.2 | 56.3-109.3 |
By the printing process that the simulation texolite is extruded between two high speed rotary-drums repeatedly, the texolite sample is tested.Below table 2 show the texolite that is added with polyurethane and do not have polyurethane in the loss of having printed thickness of slab after 50,000 times.
Table 2
| Base material | Print the loss (no polyurethane) of thickness of slab after 50,000 times | Print the loss (polyurethane is arranged) of thickness of slab after 50,000 times |
| Texolite | 0.058mm | 0.033mm |
Though the present invention is described in detail, obviously can make variants and modifications to the present invention without departing from the present invention with reference to preferred embodiment.
Claims (12)
1, a kind of cloth inserted rubber printing plate, it has improved the resistance to gauge loss, this cloth inserted rubber printing plate comprises printing top layer and at least one tissue layer, wherein, by being impregnated into, 100% solid elastic urethanes handled described at least one tissue layer in described at least one tissue layer, so that this at least one tissue layer is resisted permanent deformation when being subjected to printing nip pressures, described cloth inserted rubber printing plate keeps at least 95% of original gauge in its whole service life.
2, cloth inserted rubber printing plate as claimed in claim 1, wherein, described tissue layer is selected from woven fabric, non-woven fabric, inlaid thread fabric or cord.
3, cloth inserted rubber printing plate as claimed in claim 1, wherein, this cloth inserted rubber printing plate comprises compressible stratum.
4, cloth inserted rubber printing plate as claimed in claim 1, wherein, described at least one tissue layer has been used about 6g/m
2To about 205g/m
2Described elastomeric urethane compound dipping.
5, cloth inserted rubber printing plate as claimed in claim 1, wherein, described at least one tissue layer has been used about 6g/m
2To about 125g/m
2Described elastomeric urethane compound dipping.
6, cloth inserted rubber printing plate as claimed in claim 1, wherein, described elastic polyurethane is selected from cast urethane elastomer and thermoplastic polyurethane.
7, cloth inserted rubber printing plate as claimed in claim 1, this cloth inserted rubber printing plate comprises at least two tissue layer, wherein, described each tissue layer is flooded with described elastomeric urethane compound.
8, a kind of method of making the improved cloth inserted rubber printing plate of resistance of gauge loss comprises:
The cloth inserted rubber printing plate that comprises printing top layer and at least one tissue layer is provided;
With described at least one tissue layer of 100% solid elastic urethanes dipping, so that described polyurethane is penetrated in the air gap in each fibre bundle in the described tissue layer and makes described fiber fix and not relative motion, thereby make described cloth inserted rubber printing plate in whole service life, keep at least 95% of original gauge.
9, method as claimed in claim 8, wherein, described elastic polyurethane is selected from cast urethane elastomer and thermoplastic polyurethane.
10, method as claimed in claim 9, wherein, described elastic polyurethane comprises cast urethane elastomer, and described method comprises the described polyurethane of curing.
11, method as claimed in claim 8 wherein, is used about 6g/m
2To about 205g/m
2Described elastomeric urethane compound flood described at least one tissue layer.
12, cloth inserted rubber printing plate as claimed in claim 7 wherein, is used about 6g/m
2To about 125g/m
2Described elastomeric urethane compound flood described at least one tissue layer.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US74008105P | 2005-11-28 | 2005-11-28 | |
| US60/740,081 | 2005-11-28 | ||
| US11/604,521 | 2006-11-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101316722A true CN101316722A (en) | 2008-12-03 |
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ID=40107326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006800445013A Pending CN101316722A (en) | 2005-11-28 | 2006-11-28 | Printing blanket having improved dynamic thickness stability |
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| Country | Link |
|---|---|
| CN (1) | CN101316722A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107323074A (en) * | 2017-07-20 | 2017-11-07 | 苏州市烨铭塑胶制品厂 | A kind of bat printing bottom plate for fabric |
-
2006
- 2006-11-28 CN CNA2006800445013A patent/CN101316722A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107323074A (en) * | 2017-07-20 | 2017-11-07 | 苏州市烨铭塑胶制品厂 | A kind of bat printing bottom plate for fabric |
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