JPH06137318A - Fiber reinforced resin roller and manufacture thereof - Google Patents

Abstract

PURPOSE:To facilitate conveyance because of lightweight, enable driving in low torque, endure high speed operation, improve productivity, and contribute to reduction of labor by coating the surface of an FRP roller element pipe with a fluorocarbon resin particulate contained complex metal layer. CONSTITUTION:A proper backing layer is arranged on the surface of an FRP (fiber reinforced resin) roller element pipe, and next, fluorocarbon resin particulate contained electroless complex plating is applied. When the electroless complex plating is applied, roller accuracy such as circularity or straightness of the FRP roller element pipe (after the backing layer is applied) is finished beforehand by grinding or polishing or the like, and afterwards, the fluorocarbon resin particulate contained electroless complex plating is applied. Since a coat of the electroless plating is adhered uniformly to the surface without causing nonuniformity of a place, it has an advantage that a process such as machining by a lathe after the metal plating can be omitted or a process such as grinding can be omitted when occasion demands. Desired surface roughness can be obtained by carrying out surface polishing finish simply according to its necessity.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a fiber-reinforced resin roller.
And a manufacturing method thereof. More specifically, the present invention relates to a fiber-reinforced resin roll suitable for a printing machine and a method for producing the roll.

[0002]

2. Description of the Related Art Rolls have been used in various industrial fields such as film and paper making. The weight of the roll has been reduced for the purpose of easy transportation, improvement of productivity, and labor saving. Recently, roll materials have been changed from metal to fiber reinforced resin (hereinafter referred to as FR
(Sometimes referred to as "P") is being used. In addition, metal coating of the surface of the FRP roll by plating or the like is being performed. Also,
It is known to coat the surface of a steel roll shell with a fluororesin.

[0003]

However, conventional rolls are light in weight and have excellent surface sliding properties,
Moreover, there was not always sufficient satisfaction in applications requiring water repellency and oil repellency. In particular, a printing roll, for example, a transport roll of a rotary printing machine, more specifically, a newspaper transport roll of a newspaper rotary printing machine, the printing ink printed on the paper is transferred to the roll with the demand for weight reduction. There has been a problem that the roll becomes dirty and further it stains the printed matter. As a means for solving these problems, for example, the surface of the roll is coated with a fluororesin, the one having a low surface energy is effective from the viewpoint of water repellency and oil repellency, but static electricity due to lack of conductivity. There is a problem that it is generated, and a problem that it is easily scratched due to its low hardness.

[0004]

Means for Solving the Problems As a result of intensive studies in view of the above problems, the inventors of the present invention have achieved the above-mentioned problems by coating the surface of a FRP roll stock tube with a composite plating layer containing fine particles of fluororesin. The inventors have found that they can be solved and reached the present invention.

That is, the present invention comprises the following inventions. 1. A fiber-reinforced resin roll characterized in that the surface of a fiber-reinforced resin roll tube is coated with a composite plating layer containing fluorine resin particles. 2. A fiber-reinforced resin roll for a printing machine, characterized in that the surface of the fiber-reinforced resin roll tube is covered with a composite plating layer containing fine particles of fluororesin. 3. A method for producing a fiber-reinforced resin roll, which comprises performing the following steps in this order. (1) A step of providing a base layer of a resin composition for electroless plating on the surface of a fiber-reinforced resin roll tube. (2) A step of finishing roll accuracy by grinding and / or polishing the underlayer. (3) A step of performing electroless composite plating containing fine particles of fluororesin. (4) A step of polishing the surface. 4. A method for producing a fiber-reinforced resin roll, which comprises performing the following steps in this order. (1) A step of subjecting the surface of the fiber-reinforced resin roll raw tube to a conductive treatment. (2) A step of performing electrolytic plating. (3) A step of finishing roll accuracy by grinding and / or polishing. (4) Next, a step of performing electroless composite plating containing fine particles of fluororesin. (5) A step of polishing the surface. In addition, in these manufacturing methods of this invention, an additional process can also be inserted before or after the process shown above.

The FRP roll element tube used in the present invention has, as reinforcing fibers, inorganic fibers such as glass fibers, carbon fibers and graphite fibers, and organic fibers such as aromatic polyamide fibers, polyimide fibers and high strength polyethylene fibers. It is molded using one kind or two or more kinds of fibers selected from the fibers. In particular, it is preferable to use carbon fiber and / or glass fiber as the reinforcing fiber for applications requiring light weight, high rigidity and high strength. Also, fibers having different shapes can be used in combination.

In addition to the reinforcing fibers, talc, if necessary,
It is also possible to add inorganic particles such as mica and silica, and metal powder such as iron powder or aluminum powder.

The matrix resin of FRP is not particularly limited, and thermosetting resin such as epoxy resin, polyimide resin, vinyl ester resin, etc., thermoplastic resin such as polyethylene, polypropylene, nylon 6, nylon 66, polyether sulfone, etc. Can be used. Among these, epoxy resin and vinyl ester resin are preferable from the viewpoint of the manufacturing process of the FRP roll base pipe and the performance.

In this case, for example, after the reinforced fiber tow is impregnated with an uncured epoxy resin or the like, a FRP roll tube can be manufactured by the filament winding method. Further, a sheet-like prepreg in which uncured resin is impregnated in the aligned reinforcing fiber bundle is wound around a mandrel, and heated and pressed to produce a FRP roll tube.

The composite plating containing fine particles of fluororesin used in the present invention is a general term for a plating consisting of nickel or its alloy, chromium or its alloy, or copper or its alloy and fine particles of fluororesin. is there.

As the fluororesin, polytetrafluoroethylene, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, tetrafluoroethylene-hexafluoropropylene copolymer, tetrafluoroethylene-ethylene copolymer, polyvinylene fluoride, Polychlorotrifluoroethylene etc. can be illustrated. Further, in the present invention, the term “fine particles” refers to particles having a number average particle diameter of about 100 μm or less, preferably a number average particle diameter of 10 μm or less, and from the viewpoint of surface polishing finish and uniformity, Number average particle size is 1μ
It is more preferably m or less.

In the present invention, the content ratio of the fine particles of the fluororesin in the composite plating is preferably 10 to 30% by volume in view of the ability to reduce the surface energy, the hardness of the surface, and the conductivity. If it is less than 10% by volume, the initial purpose cannot be achieved because the surface energy is not sufficiently reduced. On the other hand, if it exceeds 30% by volume, problems such as insufficient surface hardness and conductivity occur, which is not preferable.

In the present invention, the thickness of the composite plating layer containing fine particles of fluororesin can be appropriately selected according to the application, but from the viewpoint of the performance manifestation aimed at by the present invention, it is 5 to 50.
μm is a preferable range. Among the above-mentioned composite plating, the composite plating composed of nickel or its alloy and polytetrafluoroethylene fine particles is preferable from the viewpoint of reduction of surface hardness and surface energy.

To finish the electroless composite plating layer containing fine particles of fluororesin, the surface is finished by usual grinding and / or polishing. The advantage of electroless plating is that the unevenness of the thickness of the electroless plating layer is small, so that turning by a lathe can be omitted. On the other hand, in the case of electrolytic plating, the thickness unevenness of the plating layer is relatively large, so it is necessary to thicken the plating layer and finish the roll accuracy by turning. When the surface finish is insufficient, there arises a problem that contamination by printing ink is likely to occur. From this viewpoint, the surface finish is preferably 4S or less, more preferably 3S or less.

Next, a method of manufacturing the FRP roll of the present invention will be described. As described above, a known method can be applied as a method for manufacturing the FRP roll tube. The feature of the method of the present invention is that an appropriate underlayer is provided on the surface of the FRP roll tube, and then electroless composite plating containing fluorine resin particles is applied. In electroless composite plating, the roll accuracy such as roundness and straightness of the FRP roll tube (underlayer is applied) is finished by grinding or polishing, and then the fluorine resin fine particles are not added. Perform electrolytic composite plating. Since the coating of electroless plating adheres evenly to the surface without unevenness in the place,
After plating, there is an advantage that steps such as turning by a lathe and, in some cases, grinding can be omitted. In addition, a desired surface roughness can be obtained by simply polishing the surface if necessary.

Next, a preferred embodiment of the production method of the present invention will be specifically described. The first method is FR
An underlayer of the resin composition for electroless plating is provided on the surface of the P roll tube, the roll precision is finished by grinding and / or polishing the underlayer, and then electroless composite plating containing fluorine resin fine particles is performed. To do. Here, before performing the electroless composite plating, other electroless plating may be performed in advance. The method of grinding and / or polishing the underlayer is not particularly limited, and a generally practiced method can be applied.

Here, the resin composition for electroless plating may be a thermoplastic resin such as ABS resin which has been conventionally subjected to electroless plating, but obtains good adhesion to a FRP roll tube. In order to achieve this, the same matrix resin as that used for forming the FRP roll base tube, or a resin that is well compatible with the matrix resin, as a main component, is used as an inorganic substance that is easily etched during acid or alkali etching in the previous step of electroless plating. It is preferable to use a resin composition containing an organic powder.

Specifically, when an epoxy resin is used as the matrix resin of the FRP roll tube, the resin composition for electroless plating contains epoxy resin or vinyl ester resin as a main component, and powdery magnesium carbonate or magnesium carbonate. It is preferable to use a resin composition containing dolomite.

The electroless composite plating containing fine particles of fluororesin may be directly applied to the surface of the resin composition layer for electroless plating, but if necessary, electroless nickel plating or electroless nickel-phosphorus plating may be used. It may be performed after the electroless plating.

The second method preferred in manufacturing is F
A method of subjecting the surface of the RP roll raw tube to electroconductivity treatment, performing electrolytic plating, finishing the roll surface by grinding and / or polishing, and then performing electroless composite plating containing fluororesin fine particles be able to.

Here, various methods can be used as the conductive treatment. For example, a method of applying electroless plating to the surface of the FRP roll shell, a method of sticking a metal foil to the surface of the FRP roll shell, or a resin containing conductive fine powder such as metal powder. The method of can be illustrated.

The field of application of the fiber-reinforced resin roll of the present invention will be described. Since the fiber-reinforced resin roll of the present invention is lightweight, has high hardness, and has electrical conductivity, it is useful for various industrial applications such as film production and papermaking, but it was found to be particularly suitable for printing applications. . Specifically, it has been found that the fiber-reinforced resin roll of the present invention has the characteristics that the roll surface is unlikely to be contaminated with ink, and that the ink adhering to the roll surface can be easily removed. Such characteristics show that the roll of the present invention is particularly suitable as a transport roll of a printing press that conveys a printed matter at a high speed, and particularly a newspaper transport roll of a newspaper printing press.

[0023]

EXAMPLES The present invention will now be described in detail with reference to examples, but the present invention is not limited to these examples.

Example 1 A cylindrical stainless mandrel having an outer diameter of 70 mm and a length of 2000 mm was mounted on a filament winding apparatus, a mold release agent was applied to the mandrel, and then carbon fibers were coated on the mandrel with a liquid epoxy resin composition. The product was wrapped while being impregnated. The winding angle of the carbon fiber was ± 16 °, and the winding thickness was 3.0 mm. Here, as for the volume ratio of the fiber and the resin, the amount of the resin adhered was adjusted so that the resin was 60 ± 2%.

As the carbon fiber, manufactured by Sumika Hercules Co., Ltd., trade name: Magnamite AS4 (modulus of elasticity 24 ton /
mm ² , strength 390 kg / mm ² ) was used. The epoxy resin composition is a diglycidyl ether of bisphenol A (manufactured by Sumitomo Chemical Co., Ltd., trade name: Sumiepoxy ELA128) as an epoxy resin, and a uniroyal company as a curing agent, trade name: Tonox 60-40 (metaphenylene). A eutectic mixture of diamine and diaminodiphenylmethane was used in a stoichiometric amount.

The resin-impregnated carbon fiber wound around the mandrel is placed in a thermosetting oven together with the mandrel, and
It was kept at 0 ° C. for 2 hours for curing. After curing, the mold was removed from the mandrel to obtain a carbon fiber reinforced resin cylindrical molded body. Unwanted parts at both ends of the molded body were cut and removed. Then, the surface of the molded body was cut using a lathe to obtain a carbon fiber reinforced resin roll tube.

Subsequently, an epoxy resin composition for electroless plating is applied to the surface of the roll tube to a thickness of about 1 mm, and 1
Cured at 20 ° C. for 2 hours. Here, as the epoxy resin composition for electroless plating, 100 parts by weight of Sumiepoxy ELA128 as an epoxy resin and a curing agent manufactured by Hitachi Chemical Co., Ltd., trade name: HN-5500
85 parts by weight of (methylhexahydrophthalic anhydride) as a curing accelerator manufactured by Sumitomo Chemical Co., Ltd., trade name: Sumicure D (2,4,6-tris (dimethylaminomethyl))
1 part by weight of phenol), and then 50 parts by weight of Dolomite DW350 (complex salt of magnesium carbonate and calcium carbonate) manufactured by Shimizu Industry Co., Ltd. is added.
The composition obtained by mixing with stirring was used.

The surface roughness (JIS B0601) of the FRP roll raw tube coated with the resin composition for electroless plating was finished to 2S using a grinder. Also, in this step, the roll precision was finished to the desired roll roundness and straightness. After finishing, the thickness of the resin composition layer for electroless plating was in the range of 300 μm to 700 μm at any position of the roll.

Subsequently, after performing a pretreatment of ordinary electroless plating, electroless nickel-phosphorus alloy plating is applied to about 2
It was uniformly coated with a thickness of 0 μm. Subsequently, electroless nickel-phosphorus composite plating containing fluororesin (polytetrafluoroethylene) fine particles was applied to a thickness of about 30 μm. The electroless nickel-phosphorus composite plating containing the fluorine resin fine particles is manufactured by EBARA Eugelite Co., Ltd., trade name:
Enlube 750 was used. The content of the fluororesin in the composite plating was about 20% by volume. The particle size of the fluororesin fine particles was in the range of approximately 0.1 to 0.5 μm. The hardness of the plated surface was 200 to 300 HV.

Then, the surface of the carbon fiber reinforced resin roll coated by electroless composite plating was polished to finish the surface roughness to 1S. The obtained carbon fiber reinforced resin roll was used as a roll for newspaper conveyance of a rotary press for newspapers. As a result, it was found that it can be driven with low torque and can withstand high speed operation because it is lighter in weight than the conventional steel chrome plated finish roll.
Further, it has been found that the contamination of the surface by the printing ink is reduced as compared with the conventional one, and the ink contaminated on the surface can be easily removed. The conductivity of the roll was good.

Example 2 In the same manner as in Example 1, a carbon fiber reinforced resin roll shell was molded by the filament winding method. Then, after lathing the surface, using an adhesive,
Electrolytic copper foil having a thickness of 35 μm and a width of 50 mm, which has been roughened (manufactured by Fukuda Metal Foil & Powder Co., Ltd., trade name: CF-
T8) was spirally attached to the entire outer peripheral surface so that no gap was generated. Here, a cyanoacrylate adhesive was used as the adhesive. After removing the excess adhesive oozing on the surface, electrolytic copper plating was applied to a thickness of about 500 μm. After that, precision and surface finishing were performed using a lathe and a polishing machine. Then, as in Example 1, electroless composite plating containing fine particles of fluororesin was applied to a thickness of about 30 μm.
m. After that, polishing finish is performed and the surface roughness is 1S.
Finished.

The roll coated with the composite plating containing the fluororesin fine particles thus obtained was evaluated in the same manner as in Example 1. As a result, it was found that compared with the conventional steel chrome-plated finish roll, it can be driven with a low torque due to its light weight, and can withstand high-speed operation. Further, it has been found that the contamination of the surface by the printing ink is reduced as compared with the conventional one, and the ink having the surface contaminated can be easily removed. The surface hardness and conductivity were as good as in Example 1.

[0033]

Since the roll of the present invention is lightweight, it can be easily transported, can be driven with a low torque, and can withstand high-speed operation, contributing to improved productivity and labor saving. And is useful in various industrial fields such as film and paper manufacturing. Further, the roll of the present invention is particularly useful in application fields in which improvement of sliding property and reduction of contamination on the roll surface are desired. When used as a roll for transporting printed matter of a rotary printing machine used for newspaper printing or the like, there is little contamination of the roll surface by printing ink and the contamination can be easily removed. The method for producing a fiber-reinforced resin roll of the present invention is excellent in productivity because the machining process is simplified.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hitoshi Murotani 6 Kitahara, Tsukuba-shi, Ibaraki, Sumitomo Chemical Co., Ltd. (72) Inventor Koji Yamatsuta 6 Kitahara, Tsukuba-shi, Ibaraki, Sumitomo Chemical Co., Ltd.

Claims (6)

[Claims] 1. A fiber-reinforced resin roll characterized in that the surface of a fiber-reinforced resin roll tube is coated with a composite plating layer containing fluorine resin particles. 2. The roll according to claim 1, wherein the surface of the fiber-reinforced resin roll stock tube is coated with a resin composition layer for electroless plating, and then an electroless composite plating layer containing fine particles of fluororesin. 3. A fiber-reinforced resin roll for a printing machine, characterized in that the surface of a fiber-reinforced resin roll tube is coated with a composite plating layer containing fluorine resin particles. 4. The roll according to claim 1, wherein the composite plating layer contains nickel or its alloy and polytetrafluoroethylene fine particles as essential components. 5. A method for producing a fiber-reinforced resin roll, which comprises performing the following steps in this order. 1. A step of providing a base layer of a resin composition for electroless plating on the surface of a fiber-reinforced resin roll shell. 2. A step of finishing roll accuracy by grinding and / or polishing the underlayer. 3. A step of performing electroless composite plating containing fine particles of fluororesin. 4. The process of polishing the surface. 6. A method for producing a fiber-reinforced resin roll, which comprises performing the following steps in this order. 1. A step of applying a conductive treatment to the surface of a fiber-reinforced resin roll tube. 2. Electrolytic plating process. 3. A process of finishing roll accuracy by grinding and / or polishing. 4. A step of performing electroless composite plating containing fine particles of fluororesin. 5. The process of polishing the surface.