JPH02296008A - Reinforced-plastic-made metal-coat roll - Google Patents

Abstract

PURPOSE:To strengthen the joint between a roll-material pipe and a metal-coat layer by providing a layer of a specific thickness consisting of one out of phenol resin, epoxy resin, polyester resin, and polyimide resin on the surface of the roll-material pipe and on the metal journal parts thereof, and further providing a metal-coat layer on its surface by means of plating. CONSTITUTION:For the resin-coated layer 2 provided on the surface of a rein- forced-plastic-made roll-material pipe 1, one cut of phenol resin, epoxy resin, polyester resin, and polyimide resin is selected and used. The above resin is diluted by an organic solvent, and is applied by spray coating or the like so as to cover the roll-material pipe within the range of 10 to 100 microns in thickness, and is hardened and formed. Further, the resin coating is applied on the metal journal parts 4, 4' integrally with the surface of the roll-material pipe 1. In the metal-coat layer 3 by means of plating, two-layers construction in which the inner layer is made up of a copper or nickel layer by means of chemical plating and the outer layer is made up of a hard chromium layer by means of electric plating is generally used.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention primarily relates to a metal-coated roll made of reinforced plastic that can be used as a transport roll for plastic film, paper, etc., a support roll, and the like.

[Conventional technology]

In recent years, it has replaced the widely used metal rolls! ! Reinforced plastic rolls began to be used because of their high yield, high strength, and low deflection. However, reinforced plastics have inferior abrasion resistance of 1f compared to metals, and are prone to unevenness on the roll surface as they are used. Since there are problems such as scratching or damage to the plastic rolls (e.g.), the surface of reinforced plastic rolls is often coated with hard metal plating.

As this kind of roll, for example, JP-A-63-674
No. 22 discloses that the inner surface layer is a copper or nickel layer, the M outer layer is a hard chromium layer, and the thickness of the hard chromium layer is limited, and JP-A No. 63-259214 discloses A vibrator made of carbon fiber-reinforced plastic having a limited diameter and depth and a surface coated with metal has been proposed. However, in these conventional products, the bonding between the metal coat layer and the rolled raw tube is not yet sufficient, and peeling may occur in some areas during use, which remains a problem.

(Problems to be Solved by the Invention) The present invention prevents surface deterioration of reinforced plastic roll tubes through metal coating pretreatment (chemical etching, honing, blasting, etc.), and also prevents metal coating during plating. By reducing the deterioration of the matrix material (plus material) of the rolled raw tube caused by the coating liquid and the damage to the filler/matrix interface, the combination between the rolled raw tube and the metal coating layer is strengthened and it can withstand long-term use. Aim to get a roll.

[Means for solving problems]

The gist of the present invention is to integrate a resin coating layer selected from phenol VII resin, epoxy resin, polyester resin, and polyimide resin on the surface of a reinforced plastic roll material tube and on the outside of the metal journal part with a thickness of 10 to 100 μm. and provide a plurality of metal coat layers on the surface of the coating layer by plating, or apply phenol side to the surface of the reinforced plastic roll tube and the outside of the metal journal part using epoxy resin, polyester resin, polyimide resin. A liquid synthetic resin selected from the following has an average particle size of 10 to 1
A resin coating layer of 00μ powdered ABS resin mixed at a ratio of 5~30% Tokei is integrated with a thickness of 50~100u'C.
This is a metal coated roll made of reinforced plastic, characterized in that a metal coat layer is provided on the surface of the coating layer.

Hereinafter, the present invention will be explained in detail based on the Meishi spoon shown in Figure 1.

In the present invention, the roll tube 1 is made of reinforced plastic that is a composite of inorganic fibers such as carbon fibers or organic synthetic fibers such as aromatic polyamide, and thermosetting resins such as carbonol and epoxy. Resin coating layer 2 on the surface
A plurality of metal coating layers ♀ are formed by coating through the coating.The resin coating layer 2 requires a synthetic resin selected from phenol resin, epoxy resin, polyester resin, and polyimide resin. For example, after diluting with an organic solvent such as acetone or MEK, it is coated with Fl17 to a thickness of 10 to 100 μ by ironing, spraying, or electrostatic treatment, and is cured.

If the thickness is less than 10 μm, the resin-coated portion is likely to deteriorate during pre-treatment for plating, and if it exceeds 100 μm, the coated tubes will not bond well, and the desired effect will not be achieved. , the resin coating layer 2 is made of liquid synthetic resin selected from phenol resin, epoxy resin, polyester resin, and polyimide resin.
Average FL diameter 10 to 100μ obtained by stirring resin pellets
You may add 5-30% by weight of powdered ABS resin and mix and coat in the same manner as above, the coating thickness at this time is preferably 50-100u, 1 thickness is smaller than this range. If the mixing ratio of ABS resin is large, the resin liquid? ! ! If the layer becomes uneven, if the thickness exceeds this range, or if the mixing ratio is small, the desired effect cannot be achieved in either case, although the metal tube can be bonded well.

Furthermore, it is preferable to provide this resin coating integrally on the surface of the roll tube 1 and on the metal journal parts 4, 4' made of aluminum alloy or the like. This makes it possible to protect the journal portion and the contact portion between the journal portion and the raw tube from deterioration during plating. When a mixture of the liquid synthetic resin and the powdered ABS resin is used during resin coating,
The liquid synthetic resin has superior corrosion resistance to surface treatment liquids and plating liquids compared to ABS resin, so there is less damage caused by the liquids, and the resin coating layer 2 is shown in an enlarged view of part A in Fig. 1. As shown in Figure 2, the surface becomes moderately uneven. In FIG. 2, a indicates a portion eroded by the plating solution, and b indicates a concave portion due to flaking of the powdered synthetic resin. When the resin coating layer has such a moderately uneven surface, the metal coating layer 3 formed by coating due to the anchor effect is coated more firmly.

Metal coatings by plating usually have a two-layer structure with a chemically plated copper or nickel layer on the inner layer and a hard chromium layer on the outer layer, or a chemically plated inner layer.
It may also have a three-layer structure, with a copper or nickel layer 9 formed by ink, a copper or nickel layer formed by electroplating as the middle layer, and an award-winning chromium layer formed by electroplating as the outer layer. If the thickness of the metal coat layer is 200 μ or more, it is sufficient in terms of wear resistance during use.

〔Example〕

Outer diameter 59mmΦ, inner diameter 52mrr+φ, length 400mm
An aluminum alloy journal was attached to a carbon fiber-reinforced epoxy resin roll tube, and an epoxy resin coating layer with a rough thickness of 40u was provided (Example 1), 50u
Thick phenolic resin coating layer provided (Example 2)
and an epoxy resin mixed with a powdered ABS resin having an average particle size of 80 μ at a ratio of 12% by weight to form a 100 μ thick M layer (Example 3) by chemical plating] 50
Inventive products (Examples 1 to 3) in which a nickel layer with a thickness of u is formed and a hard chromium layer with a thickness of 55 u on the surface of the nickel (examples 1 to 3) and those without a resin coating layer. A comparison was made with the same metal coat as above (conventional product).

When the inventive product and the conventional product were installed as guide rolls in the same plastic film coating device, and the operating time of the device until it needed to be replaced was compared, the inventive product had a service life 1.8 times longer than the conventional product. Was.

Explanation of symbols 1・・・・・・・・・Roll raw tube 2・・・・−・
......-Resin coating layer 3...Metal coat layer 4.4'...Metal journal portion [Effects of the invention] As described above, the present invention is a simple process. This strengthens the bond between the reinforced plastic roll tube and the metal coat layer, increasing the lifespan of the roll, and is extremely useful industrially.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view showing how the present invention is implemented. FIG. 2 is an enlarged partial view of section A in FIG. 1.

Claims (2)

[Claims] (1) A resin coating layer selected from phenol resin, epoxy resin, polyester resin, and polyimide resin is integrally provided on the surface of the reinforced plastic roll tube and on each of the metal journal parts, and has a thickness of 10 to 100 μm. ,
A reinforced plastic metal coat roll, characterized in that a plurality of metal coat layers are provided on the surface of the coating layer by plating. (2) A liquid synthetic resin selected from phenol resin, epoxy resin, polyester resin, and polyimide resin and powdered ABS resin with a radius particle size of 10 to 100μ are applied to the surface and metal journal of the reinforced plastic roll tube. 50 to 30% resin coating layer mixed at a ratio of 5 to 30% by weight
A metal-coated roll made of reinforced plastic, characterized in that it is integrally formed with a thickness of 100μ, and a plurality of metal coat layers are provided on the surface of the coating layer by plating.