NL8000618A - COMPRESSIBLE PRESSURE ELEMENT CONTAINING THERMOSOL LAMINA. - Google Patents

Description

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Compressible pressure element, containing thermoso1-lamina.

The invention relates to a resilient compressible element having at least two lamina, one of which is a compressible layer and the other a thermosol.

The preferred compressible material is the material described in U.S. Patent 3,147,698, which describes the material used in the laminates. U.S. Pat. No. 3,652,376 discloses further laminates using the compressible element of the above U.S. Pat. No. 3,147,698.

Thermosol materials using polyvinyl chloride plastisol along with the cross-linking monomers 1,3-butylene dimethacrylate and trimethylolpropane trimethacrylate are described in the sales brochure of Rohm and Haas Company, CM-32.

The object of the invention is to provide an improved printer pack that surpasses all known packings, in a new product using which the above object can be achieved, and in a superior method of manufacturing a printer pack and analog printer elements.

Such a superior method must have as few disadvantages as possible, for instance practically eliminating contamination, reducing costs and being energy-saving. In particular, the invention increases the productivity of work, manufacturing equipment and space.

Some drawbacks of the hitherto known procedures used for the manufacture of pressure elements are the following. Solvent-applied elastomers generally require a number of coating steps or a number of in-line coatings to allow rapid removal of the solvent. Elastomers applied by rollers have the disadvantage of poor adhesion, air entrapment and difficult gauge control. Although plastisols are not known to have been used in the production of resilient compressible pressure elements, they would have the obvious disadvantage of being subject to heat deformation, poor solvent resistance, and poor impact resistance.

It could be believed that thermosols also have drawbacks such as an instability of the solution viscosity and a tendency to pre-cure before proper lamination has occurred, but it has surprisingly been found that the thermosols are not only easily coated on the desired compressible lamina, but that the thermosols can also be molded into sufficiently resilient lamina of sufficient integrity to provide improved collapse resistance over a long period of use compared to the prior art laminate structures.

In accordance with one aspect of the invention, there is provided a novel thermosol product containing from about 30 to about 95 weight percent polyvinyl polymer plastisol, from about 2 to about 20 weight percent polyacrylate monomer, cross-linkable with the polyvinyl polymer to form a thermoset polymer , and about 2 to about 30 weight percent phenolic resin. The thermosol preferably contains a peroxide-free radical initiator. The polyvinylplastic sol polymer is preferably a polyvinyl chloride and the acrylate monomer is preferably a di- or triacrylate. The plasticizer of the plastisol is preferably dioctyl phthalate, which is present in an amount from about 15 to about 65% by weight of the plastisol.

According to another aspect of the invention, there is provided a resilient compressible pressure element, which contains a compressible lamina and a thermosol lamina. Preferably 8000618 t i 3, the compressible lamina contains voids and consists of a fibrous sheet impregnated with an epoxy resin. The voids preferably comprise at least about 20% of the volume of the compressible lamina. The thermosol is preferably of the type 5 polyvinyl plastisol and polyacrylate monomer as described above.

In other aspects of the invention, other thermosol and compressible lamina and woven textile lamina may be added. A thermo-10 sol-lamina can form the outer work surface for the resilient compressible pressure member in some preferred structures.

In other aspects of the invention, any material that will crosslink with the polyvinyl polymer of the plastisol to form a thermoset polymer can be used. Furthermore, in some cases the thermosol can be replaced with what is currently considered a less desirable flexible material as long as the tensile strength is at least about 56 kg / cm and preferably at least about 70 kg / cm.

The resilient compressible pressure elements of the invention preferably form press packing laminates. The highly porous compressible lamina is preferably at least 10 mils thick and the thermosol lamina is preferably at least 2 mils thick.

According to yet another aspect of the invention, a new and advantageous method for manufacturing a resilient compressible pressure element is provided.

The method includes simply coating a liquid thermosol coating at least 2 mils thick on a lamina, completely solidifying the thermosol coating, folding a second lamina over the solidified thermosol coating, and activating the thermosol coating to adhere the lamina to each other and thermoset the thermosol. The solidification is preferably accomplished by heating to cause a gelation and the thermosetting is accomplished by heating at an elevated temperature. The preferred thermosol is the thermosol described above.

In the drawings, Figure 1 is a schematic cross-sectional view of a resilient compressible pressure member laminate of the invention and Figure 2 is a flow chart of a preferred method of carrying out the invention.

Preferred embodiments will be described below.

First of all, here is a definition of a thermosol; in this description a thermosol is understood to mean a thermosetting plastisol.

The novel thermosol product of the invention, in its preferred form, contains about 30 to about 95 weight percent polyvinyl plastisol, preferably about 70 to about 90 percent, and especially about 75 to about 85 weight percent. The polyvinyl polymer is preferably polyvinyl chloride and the plasticizer is preferably dioctyl phthalate, present in an amount of from about 15 to about 65%, and preferably from about 25 to about 55% by weight of the plastisol. The product also contains an acrylate monomer, which is cross-linkable with the polyvinyl polymer to form the thermoset polymer. The acrylate monomer is preferably a di- or triacrylate and is preferably present in an amount of from about 2 to about 20% by weight, especially in an amount from about 3 to about 10% and especially in an amount of about 5 to about 9% by weight of the total product. The acrylate monomer is preferably trimethylolpropane trimethacrylate. The thermosol product preferably contains a peroxide-free radical initiator, which is preferably present in an amount of 0.01-1% by weight. The peroxide is preferably a peroxyketal.

An important component and, in its preferred form, an essential component of the thermosol product is a phenolic resin. The phenolic resin is preferably present in an amount from about 2 to about 30% by weight, especially about 8% to about 15% by weight, and especially about 11 to about 13% by weight. The phenolic resin is preferably a two-stage thermosetting phenolic resin. When the phenolic resin is present, the product in its thermoset state is stiffer but still very resilient and flexible, and the product exhibits better properties as a press packing work surface or interlayer lamina compared to laminates made of resilient compressible material, especially laminates. from highly porous fibrous material.

The thermosol product may of course also contain other ingredients, such as stabilizers, fillers, pigmenting agents and the like.

Below, a detailed description will be given of the resilient compressible pressure member, which is especially a press packing laminate, one embodiment of which is shown in Figure 1. The designations in Figure 1 are particularly intended to illustrate the base structure and indicate further laminae which can be added to enhance the utility of the product of the invention. The order of the laminas, first, second and third, are for illustrative purposes only and do not represent a required sequence of the assembly.

The base structure is a thermosol lamina, which is preferably directly attached to a compressible lamina.

The preferred thermosol product is the product described above.

The thermosol material containing the phenolic material is very aggressive adhesively, especially with regard to the epoxy-impregnated compressible lamina. It is usually very difficult to obtain good adhesion with epoxy impregnated lamina.

The compressible lamina is preferably that described in U.S. Patent 3,147,698, which is a highly porous felted fibrous sheet impregnated with an elastomeric material. The preferred elastomeric impregnant is an impregnant containing an epoxy resin. Other compressible materials with voids therein can also be used; for example, impregnated paper materials, foamed lamina and even other material, such as cork lamina, can be used as compressible layers. The voids preferably comprise at least about 20% of the volume of the lamina. Although not preferred, the compressible lamina itself may consist of a composite material formed of two or more lamina or layers.

As shown in Figure 1, the base structure may contain a woven textile material adhered to the compressible lamina of the base structure. The currently used woven textile materials are rubber impregnated, and in order to provide the desired adhesion to the textile material, a rubber adhesive layer of about 2 mils thickness is used for the adhesion of the textile material to the compressible lamina. However, an adhesive layer of adhesive which is preferably used is a thermosol. The textile material provides further lateral strength to the laminate. A pressure sensitive adhesive is then applied to the exposed surface of the woven textile material and covered with a release sheet. The resilient compressible printing element thus constructed will normally be used by removing the release sheet and sticking the element to the impression cylinder, the thermosol lamina facing the typeface. A draw sheet or tympon sheet will usually be applied to the thus-exposed first compressible lamina (see Figure 1). However, the thermosol lamina in the preferred embodiments thereof can itself function as an excellent working surface and significantly improves press packing elements in that it eliminates the need for tensile sheets and the like. The compressible lamina ensures the good compressibility of the pressure element and the thermosol lamina improves it even more than the already known surfaces in a manner that is not completely clear.

It is also often desirable to build up multiple layers of compressible lamina interspersed with thermosol lamina. It has been found that the individual compressible material lamina 8000618 4 i 7 should preferably be from about 10 to about 50 mils, and especially about 20 to about 30 mils, in order to obtain optimal compression properties.

Preferably, the individual thermosol lamina is at least about 2 mils thick, and more particularly, the thickness is maintained at about 5 to about 75 mils, and especially about 10 to about 20 mils, especially when using multiple compressible layers . The thickness of the thermosol contributes to the overall laminate thickness, as well as to the quality of the shock resistance.

In order to build up the multiple alternating layers, it is preferable to combine each compressible lamina with the next adjacent compressible lamina by direct bonding of each lamina to the opposite surfaces of a single thermosol lamina without using intermediate layers or agents or without it being necessary.

Thus, the first, second and third compressible laminas can be joined together via the first and second thermosol laminas as shown in Figure 1. If a thermosol work surface is desirable, this composite structure or subassembly may be provided a thermosol on a surface thereof. If desired, to obtain lateral strength, the other surface of the subassembly can be provided with a woven textile material and pressure sensitive adhesive, as described above and as shown in Figure 1. Alternatively, the thermosol working surface can be replaced by a woven textile work surface. The woven textile material can be attached to the compressible lamina via a rubber adhesive or in suitable cases and preferably by a thermosol.

It will be appreciated that only a few variant structures of the resilient compressible printing element of the invention have been described. Many other constructions are possible. In some applications, it may be desirable to add further alternate intermediate lamina of compressible material and thermosol or even other materials, such as, for example, shape-stabilizing woven textiles, and it will be apparent to those skilled in the art that this can be accomplished. 6 18 8 using the measures indicated in this description.

Another surprising aspect of the resilient compressible pressure member is that it can contain a lamina with a tensile strength of at least about 56 kg / cm or even more preferably at least about 70 kg / cm disposed between the pressure member or other impact force member and the compressible lamina, while still maintaining the compressible efficacy. This is preferably accomplished by the thermosol lamina of the invention, but within the scope of the invention is any resilient compressible printing element with a new lamina having such surprising properties. The tensile strength stated in this specification is the tensile strength determined according to ASTM D142-61T.

A brief description will now be given below of the method according to the invention for the production of a resilient compressible pressure element, wherein it will be clear that in a preferred form the thermosol coating, such as that described above, is applied. as a liquid by coating on a lamina, such as the previously described compressible lamina. A preferred form of the process is shown in Figure 2. As shown in Figure 2, the compressible lamina 10 can be unrolled from a roll 11. The tbarmosol coating can be applied by the simplest method, which allows a substantially uniform coating thickness are obtained, as illustrated by the knife coater 12 and the mass of thermosol 13. The coated lamina 10 is passed through an oven 14 in which it is heated to a temperature of about 200-220 ° F in order to gel and form of a solid thermoplastic material. This laminate 15 is then wound up on roll 16. The procedure of forming laminate 15 is to be considered as the first stage 17 of the method. This laminate 15 is the basic structure of Figure 1 before it is thermo-cured and 35 can of course be thermo-cured in this configuration.

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The method will now be described for the preferred embodiment, illustrated as to its essential features in Figure 2, for forming the assembly of Figure 1 in the case where the two outer surfaces are a woven textile material. Only the formation of the three compressible lamina, fastened together by two thermosol lamina to form the subassembly, is illustrated in detail in Figure 2, indicating how the further lamina are applied, since this can in principle be described. 10 operated according to known procedures.

For the formation of the subassembly laminate, the roll 16 in Figure 2 is shown as being divided into two rolls 16a and 16b by cutter 18. Rolls 16a and 16b are then arranged for unwinding and handling in a second step or curing step 19 of the method. A roll -11a, such as original roll 11, is placed in an unwinding condition to provide a lamina 10a to be combined with the laminates 15a and 15b, as illustrated in Figure 2. Guide rollers 20 and 21 may be provided for aligning 20 the power supplies in parallel relationship. The direction-change rollers 22 and 23 may be provided for orienting the assembly around curing drum 24. The curing drum can be operated at a temperature of 300-320 ° F at its surface. It has been found preferable to contact the lamina 10a directly in contact with the curing drum 24 in order to reduce the risk of blistering at its interface with the thermosol layer to which it is bonded. Both laminates 16a and 16b are preferably directed with their thermosol lamina to the curing drum.

This orientation effects curing of the thermosol lamina from their non-bonded surfaces inwardly. Thus, good adhesion of the thermoplastic thermosol product is achieved with the adjacent compressible lamina, which are pressed against it before the thermosol is ghetted. The layered assembly of lamina 11a and 35 laminates 16a and 16b has been in contact with the surface of the drum for a sufficiently long time to allow adhesion of the 8000618

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effect and cure the thermosol, about 5 minutes in the examples below. The assembly is compressed and pressed against the drum by an endless rotating curing belt 26, which is held in place by rollers 27, 28 and 29. The newly formed assembly or sub-assembly laminate 30 is then wound on a roll 31. It may be necessary to further heat the laminate 30 after its formation to ensure complete curing of the thermosol. This can be accomplished by passing the laminate 30 through the oven 14. Many other curing devices and procedures can be used naturally, but the preferred forms thereof will utilize the principles of the preferred process described in detail above. For example, it is believed to be important to cure the thermosol lamina from their open or exposed surfaces inwardly to obtain the best results.

In order to apply the outer woven textile lamina to the outer surfaces of the subassembly 30 formed in step 19, the roll 31 can be placed as roll 11 in step 17 and drawn past knife coater 12, with a rubber adhesive is applied as a solvent cement to its outer surface to a thickness of about 2 mils.

The rubberized assembly is passed through the oven 14 to remove the solvent and then the textile material is applied to the exposed surface of the rubber almost immediately and pressed thereon by passing between two rollers, after which the assembly is wound . The assembly is then inverted and a woven textile material is applied to the other side of the sub-assembly 30 in the manner described above for the application of the first woven textile material. Then, a pressure-sensitive adhesive is applied to one of the textile surfaces by returning the latter assembly through stage 17, but a release sheet is applied to the exposed surface of the pressure-sensitive adhesive. It is preferable to use a thermosol to adhere the woven textile material to the sub-assembly 8000618 11 30, but the preparation thereof for the rubber impregnated woven textile materials is not yet perfect.

If an outer surface of the resilient compressible pressure member is to be a thermosol working surface 5, the roller 11a of step 19 in Figure 2 on its surface facing the curing drum 24 is coated with a cured thermosol lamina. This cured thermosol laminate is formed as indicated in step 17 with the exception that the roll 16 is returned through step 17 without operating the coater 12 and the oven is run at about, say, 340-350 ° F to cure the thermosol. The laminate 15 with the cured thermosol is then placed in step 19 in the place of laminate 10a and fed into the assembly with the cured thermosol lamina placed against the curing drum and the exposed surface of the compressible lamina against the thermosol. laminate lamina 15a. A woven textile material may be applied to the side of the assembly opposite to the work surface in the manner described above for the application of such a woven textile lamina.

Variations in the method of preparing other desired combination structures will be apparent to those skilled in the art. In addition, it will be appreciated that the process itself can be modified in a variety of ways, such as, for example, by cutting the press packing laminate to size rather than winding it up on roll 25 or by providing another coating as curing procedures.

The invention is further illustrated but not limited by the following examples.

Example I

A thermosol product was prepared by adding the following ingredients to a reactor under stirring in the order specified. The reactor was maintained at 75 ° F during the feed and the feed rate was as fast as reasonably possible to obtain an even dispersion thereof in the reactor.

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Parts% of total product 1. Dioctyl phthalate 60 ^ 2. Polyvinyl chloride resin, dispersion grade (Geon 121, 5 B.F. Goodrich) 3. Phenolic resin (SP6600, Schenectady 25 12.3

Chemical Ine.) 4. Trimethylolpropane tri-07.4 methacrylate monomer 10 (X980, Rohm and Haas) 5. Stabilizer, barium cadmium-3 01.5 zinc (6V6A, Ferro Chemical

Corp.) 6. 40% Organic peroxide on 0.3 00.1 15 inert filler (Luperco 231XL, Pennwalt Corp.) _ _ 203.3 100%

After complete mixing, which took about 45-60 minutes, the thermosol product was a thick liquid with a viscosity of about 20,000-30,000 eps, ready for use. In fact, the thermosol compound was kept in barrels under ambient conditions for about three days before being used. A highly porous felted fibrous sheet impregnated with an elastomeric material Buna N 25 latex and an epoxy resin, which is a condensation product of epichlorohydrin and bisphenol A cross-linked with polyamide, was prepared according to the general procedure described in the U.S. Patent 3,652,376.

As illustrated in Figure 2, a 25 mil thick sheet of the highly porous compressible material was unwound from a roll and passed through a coating station or stage 17. A conventional blade coater 12 provides application of the thermosol liquid, which is kept in the usual manner at a wall 13 at the knife blade. The thermosol was applied in a single step to a thickness of 12-14 mils and immediately passed through an oven at a residence time of 5 minutes. The thermosol was gelled to a non-tacky solid in the oven. After the now two-layer laminate emerged from the oven, it was wound up. The coated material 8000618 13 was then cut into two rolls. This was actually accomplished by unwinding a portion of a roll and cutting it rather than cutting a roll in half, as shown in Figure 2 for illustrative purposes.

The thus formed and identical laminates were then applied in their positions as shown in Figure 2 and unwound from their respective rollers as illustrated in Figure 2 with the thermo-sol lamina facing the curing drum 24. A compressible lamina, which was identical to that described above, it was then fed between the two laminate sheets and the drum 24, as also illustrated in Figure 2. The thermosol coated sides of the laminates were thus joined with the non-curing drum exposed compressible lamina surfaces.

The surface of a curing drum 24 was held at about 320 ° F under a belt tension (belt 26) of about 10,000 pounds to provide a firm compression of the faces of the individual layers to form an adhered assembly of 100 thickness mil.

This assembly was then recycled through the oven from station 17, operating at about 345 ° F, with a residence time of about 5 minutes to ensure curing of the thermosol. The now thoroughly cured assembly was then returned to station 17 and coated with a solution of nitrile rubber adhesive to 2 mil thickness and passed through oven 14, operating at about 220 ° F, in the oven at the same time as mentioned above to remove the solvent.

A 10 mil thick woven textile material impregnated with nitrile rubber was applied to the nitrile rubber adhesive and firmly adhered thereto by passing between adjacent rollers. The thus formed assembly was turned over and returned by station 17 and the procedure described above was repeated with the exception that the woven textile material had a thickness of 5 mils. The now formed assembly was then recycled through station 17 and a pressure-sensitive acrylic adhesive was applied to the exposed surface of the 8000618 14 5 mil thick textile material to a thickness of about 2 mil and passed through the oven at about 310-330 ° F for a residence time of 5 minutes and a release sheet was applied thereto in the same manner as the above-described application of the woven textile materials.

The press packing laminate of Example I was tested on a standard letterpress printing machine and was found to exhibit superior performance compared to the previously known technical press packing.

Example II

The procedure of Example X was repeated with the exception that a roll of the gelled thermosol laminate formed in the first station 17 of the process was cured by return through the oven from station 17 without further coating. The oven was run at about 345 ° F and the residence time of the laminate in the oven was about 5 minutes. The cured laminate thus formed was then transferred to the compilation curing station 19 and placed in the location of roll 11a with the cured thermosol lamina facing the curing drum 24. This assembly was then recycled through the oven from station 17, operated at 340-350 ° F for a residence time of 5 minutes to ensure curing of the thermosol. The now thoroughly cured assembly was then returned to station 17 and a woven textile lamina 25 and pressure sensitive adhesive and release sheet were added as described in Example 1 to provide the laminate of Figure 1 with the thermosol working surface.

The press packing laminate of Example II was tested on a standard letterpress machine and was found to exhibit superior performance compared to known technical press packs.

Example III

The procedure for forming the cured laminate having the basic structure of Figure 1 was performed in the manner described in Example II, and then the woven textile material, the pressure sensitive adhesive and the release sheet 8000618 were added to the exposed surface of the compressible lamina on the manner described in Example II to form a press packing laminate having only the base structure plus sub-lamina, immediately adjacent to the compressible lamina,

The press packing laminate of Example III

tested on a standard letterpress machine and found to exhibit superior performance compared to previously known technical press packings.

A single thermosol lamina with a thickness of 60 mils was molded and tested on a Scott tester and found to have a tensile strength of 112-133 kg / cm, an elongation of 200-250% and an tensile strength at 100% elongation. of 84-105 2 kg / cm and tested on a durometer and a Shore A hardness of 83-85.

From the viewpoint of processing, the procedure according to the invention eliminates the use of solvents for the lamina, which are a thermosol, and also the necessity of the application of adhesives with different properties on the outer surfaces of the compressible lamina and the resilient lamina (the thermosol) in order to provide an adhesion therebetween which is resistant to the prolonged use to which pressure elements are usually exposed. The phenolic component of the thermosol has been reported to be important in this regard and also imparts stiffening properties of a desirable and generally unpadded character. In addition, the same lamina, which provides the adhesion between the lamina and an internal stability, can also provide a work surface and vice versa. This working surface is even suitable for grinding when it is desirable to obtain a very precise caliber.

3Q Furthermore, the flexibility of the manufacturing procedure is very great. Rolls of compressible material, coated with gelled but unhardened thermosol, can be prepared in advance and then combined in varying ways to meet special customer requirements. In addition, multiple layers can be bonded together and the entire assembly can be cured on a curing drum in a single step. Thus, inventory requirements, work productivity, installation space productivity and energy productivity are greatly increased.

In pressure tests, it was found that when the thermosol coating is present above the compressible lamina such that the thermosol lamina is joined to either the pull sheet or the backing of the material being printed, the assembly is extremely resistant to collapse during a long usage time, providing a surprisingly superior printing press-10 gasket. More importantly, the print quality is superior, i.e. sharp and clear. Although the compressible lamina provides good compressibility in the printing element, its compression behavior is improved by the thermosol working surface of the invention compared to the prior art products already known in a manner that is not fully understood . Furthermore, the coherence of the. laminate drawn.

No currently known compression packing offers such superior printing performance and long life or such superior adaptability to the simplest type of assembly of a base component in a multilayer assembly.

It will be apparent to those skilled in the art that varying modifications and modifications of the invention are possible without departing from the scope of the invention.

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Claims (33)

1. A thermosol product containing about 30-95 wt% polyvinyl polymer containing plastisol, about 2-20 wt% material cross-linkable with the polyvinyl polymer to form a thermoset polymer, and about 2-30 wt .% phenolic resin. Thermosol product according to claim 1, characterized in that it contains a peroxide-free radical initiator and said material is a polyacrylate monomer. Thermosol product according to claim 1, characterized in that the polyvinyl-plastisol polymer is a polyvinyl chloride, the material required being a di- or tri-acrylate monomer. Thermosol product according to claim 3, characterized in that it contains 0.01-1% by weight of a peroxyketal-free radical initiator, the plasticizer of the polyvinyl chloride polymer-containing plastisol being dioctyl phthalate present in an amount of about 15-65% by weight of the plastisol, and the acrylate monomer is trimethylolpropane trimethacrylate, which is present in an amount of about 3-10% by weight of the total product, the plastisol being present in an amount of about 70-90 wt% and the phenolic resin is of the thermosetting two-stage type and is present in an amount of about 8-15 wt%. Thermosol product according to claim 4, characterized in that the polyvinyl polymer containing plastisol is present in an amount of about 75-85% by weight and has a plasticizer content of about 25-55% by weight, the polyacrylate monomer is present in an amount of about 5-9 wt% and the phenolic resin is present in an amount of about 11-13 wt%. 6. A resilient compressible printing element, comprising a compressible lamina and a thermosol lamina. The resilient compressible pressure element 35 according to claim 6, characterized in that the compressible lamina comprises empty spaces. - 8000618 Resilient compressible pressure element according to claim 7, characterized in that the voids of the compressible lamina comprise at least about 20% of the volume of said lamina and the thermosol lamina has a tensile strength of at least about 56 kg / cm. Resilient compressible pressure element according to claim 7, characterized in that the thermosol is about 30-95% by weight of polyvinyl-plastisol and about 2-20% by weight of a monomer, cross-linkable with the polyvinyl polymer to form a thermoset polymer. Resilient compressible pressure element according to claim 9, characterized in that the compressible lamina comprises a fibrous sheet impregnated with an impregnating agent, comprising an epoxy resin, the monomer comprising a polyacrylate and the thermosol comprising about 2-30 wt. % phenolic resin. Resilient compressible pressure element according to claim 10, characterized in that the polyvinyl-plastisol content of the thermosol is about 70-90%, the polyacrylate monomer content about 3-10% by weight and the phenol content about 8-15%. wt%. Resilient compressible element according to claim 6, characterized in that the thermosol lamina forms the outer working surface for the resilient compressible element. Resilient compressible element according to claim 6, characterized in that it comprises a woven textile lamina over the compressible lamina on the opposite side of the thermosol lamina. Resilient compressible element according to claim 13, characterized in that it comprises a pressure sensitive adhesive on and in direct contact with the woven textile material on the opposite side of the compressible lamina. Resilient compressible pressure element according to claim 6, characterized in that it comprises a second lamina 35 on the opposite side of the thermosol lamina from the first compressible lamina. 8000618 16. Resilient compressible printing element according to claim 15, characterized in that the second lamina is a second compressible lamina and this compressible lamina is in direct front-front contact with the first thermosol layer and the resilient compressible pressure element a second thermosol lamina in direct front-front contact with the compressible lamina and a third compressible lamina in direct front-front contact with the second thermosol lamina. Resilient compressible pressure element 10 according to claim 16, characterized in that it comprises a woven-lamina in front-front-union with the third compressible lamina on the opposite side of the second thermosol lamina. Resilient compressible pressure element according to claim 16, characterized in that it comprises a third thermosol lamina in front-front union with the third compressible lamina on the opposite side of the second thermosol lamina, which third thermosol lamina forms an outer work surface for the resilient compressible pressure element. 20 Resilient compressible pressure element according to claim 16, characterized in that the thermosol in each thermosol lamina comprises about 70-90 wt.% Polyvinyl chloride plastisol, about 3-10 wt.% Polyacrylate monomer, about 8-15 wt. % Phenolic resin and about 0.01-1% by weight of a peroxide-free radial initiator, and wherein each compressible lamina comprises a highly porous felted fibrous sheet impregnated with an impregnating agent comprising an epoxy resin. 20. A press packing laminate, characterized in that it comprises a highly porous compressible lamina of at least 10 mil thickness and a thermosol lamina of at least 2 mil thickness containing about 70-95 wt% polyvinyl polymer-containing plastisol and about 3-10 wt.% acrylate monomer, which is cross-linkable with the polyvinyl polymer to form a thermoset polymer. Press packing laminate according to claim 20, characterized in that it comprises a second highly porous giant compressible lamina with a thickness of at least 10 mil on the opposite side of the thermosol from the first highly porous compressible lamina, the thermosol lamina consisting of a single layer in direct contact with each of the 5 highly porous compressible lamina and the sole means of adhering said three lamina together. Press packing laminate according to claim 21, characterized in that the two highly porous compressible lamina consist of fibrous material impregnated with an impregnating agent comprising an epoxy resin and the plastisol comprising a phenolic resin of the thermosetting two-stage type, which is present in an amount of about 8-15 wt%. 23. A method of manufacturing a resiliently compressible pressure element, characterized in that a liquid thermosol coating of at least 2 mils thickness is applied to a compressible lamina by coating, the thermosol coating is allowed to solidify and then in a second stage cures the thermosol coating to its thermoset state. 24. A method according to claim 23, characterized in that solidification of the thermosol coating is effected by heating to cause a gelation and the thermosetting is effected by heating at a higher temperature. A method according to claim 24, characterized in that after the thermosol coating has solidified, a second lamina is applied directly to its exposed surface and adhered to this surface by pressing it thereon during its thermosetting heating. A method according to claim 25, characterized in that the thermosetting heat is supplied from the exposed surface of the thermosol coating inwardly. 27. A method according to claim 24, characterized in that at least two laminates, consisting of one lamina of gelled solidified thermosol and a compressible lamina, are prepared and layered with at least one further compressible lamina with the exposed surface of each of the thermosol lamina in direct contact with an exposed surface of one of the compressible lamina, the 5 layered lamina being pressed together and heated from the exposed surface of each thermosol coating inwardly to allow these lamina to bond together to form an assembly and cure the thermosol. 28. A method according to claim 27, characterized in that each of the thermosol lamina has a thickness of about 5-75 mil and each of the compressible lamina has a thickness of about 10-50 mil. A method according to claim 27, characterized in that each of the thermosol lamina has a thickness of about 10-20 mil and consists of a thermosol product comprising about 70-90 wt% polyvinyl polymer containing plastisol, about 2 -10 wt% polyacrylate monomer and about 8-15 wt% phenolic resin, and each of the compressible lamina has a thickness of about 20-30 mil. 30. A resilient compressible compression member, characterized in that it comprises a first lamina, which is compressible, and a second lamina with a tensile strength of at least about 56 kg / cm. A resilient compressible compression member according to claim 30, characterized in that it is a press gasket in which the second lamina is interposed between the direction of the pressure inticia and the compressible lamina and has a tensile strength 2 of at least about 70 kg / cm and is a thermosol. A resilient compressible pressure element 30 according to claim 31, characterized in that the thermosol comprises a polyvinyl-plastisol and a material cross-linkable therewith to form a thermoset polymer. 33. Thermosol products, pressure elements, press packing laminates and methods as described in the description and / or examples. 8000618