JP2804170B2 - Anti-rust seat sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Object of the Invention) (Industrial application field) The present invention is used to prevent rusting of a mounting seat surface between both members mounted by bolts or the like. The present invention relates to a rust-proof seat sheet to be used. (Prior Art) Conventionally, rust prevention of a mounting portion between a mounting member and a member to be mounted has been performed, for example, by a method as shown in FIG. 8 or FIG. That is, FIG. 8 shows a situation in which a hinge is attached as a mounting member to a door panel as a member to be mounted, and a rustproof sealant 102, which is a rustproof material, is brushed on a mounting seating surface 101a of a panel 101. Painted, and the mounting seat surface 103
Place the hinge 103 having a, and through the washer 104,
The bolt 105 and the nut 106 are used for screwing and fixing, and rust generated between the panel 101 and the mounting seat surfaces 101a, 103a of the hinge 103 is prevented. FIG. 9 shows a state in which a front fender as an attachment member is attached to a hood ledge as an attachment member, and has a single-layer structure ring-shaped seating surface protection as shown in FIG. 10 (a). The rust material 107 or the ring-shaped bearing rust preventive material 10 formed in a three-layer structure as shown in FIG.
8 is mounted on the mounting seat surface 109a of the hood ledge 109 shown in FIG. 9, and the front fender having the mounting seat surface 110a thereon
The front fender 110 is fixed to the hood ledge 109 by bolts 111, nuts 112 and washers 113, and rust generated between the mounting seat surfaces 109a, 110a is prevented. The rust preventive material 10 having a three-layer structure shown in FIG.
8 has a structure in which a release layer 108b made of, for example, polyester, which has relatively poor adhesiveness, is interposed between the upper and lower rust-preventing resins 108a, 108a in the figure, and is provided for rust-prevention such as parts replacement and repair. At the time of removing the member after the treatment, the rust preventive resins 108a and 108a respectively bonded to both members are easily separated from the release layer 108b, and the rust preventive resin 108a and 108a are removed by removing the member. Mounting surface 1 for the member
It is considered so that it does not peel off from 09a and 110a to cause deterioration of rust prevention performance. (Problems to be solved by the invention) However, the rust preventive sealant 10 shown in FIG.
In the case of brushing 2, the bolts 105 are tightened so that the mounting seat surfaces 101a, 1
The rust preventive sealant 102 leaks from between 03a and the panel
There is a portion where 101 and hinge 103 come into direct contact, and the mounting seat surface
There was a problem that rusting may occur early between 101a and 103a. Further, in the case of the method using the single-layer or multi-layer structure of the seat rust preventive material 107 or 108 shown in FIG. 9, the unevenness of the surface of the hood ledge 109 and the front fender 110 and the bolt
The thickness of the rust-preventive resin layer fluctuates due to fluctuations in the tightening torque, paint baking temperature, etc. of 111, and in some cases, the rust-preventive resin layer may flow out, resulting in a missing portion of the resin layer. There was a problem lacking in sex. further,
When the seat rust preventive material 108 provided with the release layer 108b is used,
It may be damaged by the tightening of the bolt 111, and peeling occurs at the interface with the hood ledge 109 or the front fender 110 instead of the peeling layer 108b, causing moisture to enter and causing rust, or peeling when removing the front fender 110 There is a problem in that separation from the layer 108b becomes difficult, which hinders repair work and the like, and this has been a problem in the rust prevention treatment of such a member mounting portion. (Object of the Invention) The present invention provides a conventional seat rust preventive sealant as described above,
Or it was made focusing on the problem of the rust preventive material of the seat surface, and there is no outflow of the rust preventive resin and no direct contact between the members due to it, and the stable rust preventive effect is maintained for a long time, An object of the present invention is to provide a rust-proof seat sheet which can be easily separated from a central peeling layer when removing both members, and can prevent generation of rust by covering a mounting seat surface of each member. I have. [Constitution of the Invention] (Means for solving the problem) The rust-proof seat surface sheet according to the present invention intervenes between the mounting member and the mounted member, and performs rust prevention on the mounting seat surface of both members. A rust-proof seat sheet comprising a release layer in the center and a rust-proof resin layer impregnated with a rust-proof resin in a base cloth on both sides of the rust-proof seat. The present invention is characterized in that the above-described configuration of the face sheet is a means for solving the above-described problem. As shown in FIG. 1, a rust-preventive seat sheet 1 according to the present invention comprises a rust-preventive resin layer 2, 2 in which a base cloth 2a is impregnated with a rust-preventive resin 2b.
It has a multilayer structure with a release layer 3 interposed between them. The rust preventive resin 2b is for welding (adhering) to the mounting seat surfaces of the mounting member and the member to be mounted, respectively, to prevent rust on the surfaces. For example, an epoxy resin having a compounding ratio shown in Table 1 is used. Can be used. In Table 1, as the resin system, the mixing ratio of liquid-solid may be, for example, 50-50, and may be appropriately determined according to the combination with the material of the base cloth 2a and the film forming the release layer 3, which will be described later. It is desirable to choose. Further, as a curing agent, dicyandiamide, 4-4′-
A main curing agent such as diaminodiphenylsulfone, phenol, polyamidoamine, and acid anhydride, and various derivatives such as imidazole, hydrazide, and guanidine are used as an accelerator for the main curing agent. Further, depending on the case, various rust preventive agents such as zinc-based rust preventive pigments may be added. The release layer 3 is interposed between the rust-preventive resin layers 2 and 2 containing the base cloth 2a, and when removing both members such as parts replacement or repair, the rust-preventive seat sheet 1 is moved to the central portion by a predetermined force. This is to prevent the rust-preventive resin layers 2 and 2 from peeling off from the mounting seat surfaces of the two members by cohesive failure. As the release layer 3, for example, a film of polyamide (nylon), polyvinyl alcohol (vinylon), regenerated cellulose (cellophane), EVA, polypropylene, Kapton, polyester or the like is used. FIG. 4 shows an experimental example of the effect of the peeling layer thickness t _P on the shear strength of the rust-proof seat sheet 1, and the vertical axis shows the shear strength ratio with respect to the conventional seat rust-proof sealant. ing. As shown in the figure, the thickness t _P of the release layer 3 is 18 μm.
If it is less than 1.5 to 3 times that of the conventional rust preventive sealant, and if it exceeds 32 μm, it has a strength of about 50% or less. It is desirable that the thickness t _P of the release layer 3 be in the range of 18 to 32 μm. Further, it is preferable that the thickness be about 18 μm or more so that the seat sheet 1 can be peeled from the central portion. The base fabric 2a impregnates and holds the rust-preventive resin 2b, and plays a role as a spacer at the time of bolt fastening, a role of preventing damage to a film forming the release layer 3, and the like.
For example, non-woven fabrics such as polyester, acrylic, vinylon, Japanese paper, and glass fiber can be used. It is not always necessary to use a non-woven fabric, and a woven fabric may be used if necessary. Fig. 5, shows an example of the experimental results showing the effect of the base fabric thickness t _F on the fastening torque ratio between the front and rear baking, the base fabric
When the thickness t _F of 2a is less than 50μm can not hold the anticorrosive resin 2b, torque reduction after outflow and baking the baking time of the resin 2b is increased, the thickness t _F conversely If it exceeds 130 μm, the fluctuation in the thickness direction at the time of tightening is too large, and it is difficult to complete the tightening. Therefore, to hold the fastening torque in more than 60% of that before baking is comparable to conventional anti-corrosion sealant is desirably in the range of 50~130μm thickness t _F of the base fabric 2b. FIG. 6 exemplifies the relationship between the total thickness T of the rust-proof seat sheet 1 and the adhesive strength, and the vertical axis shows the strength ratio to the conventional rust-proof sealant as in FIG. Therefore, the influence of the sheet thickness T on the adhesive strength is not so significant. In the figure, circles indicate that the thickness t _P of the release layer 3 is 25.
μm, triangular marks indicate the case where the thickness t _P is 9 μm, and the white one indicates the shear strength, and the solid one indicates the peel strength. FIG. 7 illustrates the relationship between the amount of resin protrusion and the sheet thickness T when the rust-proof seat sheet 1 is used for joining a door panel and a hinge. In other words, in order for the resin 2b to fill the irregularities and gaps on the joining surface and also cover the edge of the hinge to prevent rust, the rust-preventive resin 2b needs to protrude at least about 1 mm from the mounting seat surface. When it exceeds, the coverage of the end face edge tends to be non-uniform. Therefore, it is desirable that the thickness T of the rust preventive seat sheet 1 is in the range of 0.3 to 0.7 mm as is apparent from the drawing. (Effects of the Invention) The rust-proof seating sheet according to the present invention has a multilayer structure in which a release layer is sandwiched between rust-resistant resin layers in which a rust-preventive resin is impregnated in a base cloth. The rust preventive resin is held to prevent the resin from flowing out, and the action of the spacer prevents direct contact between members and a decrease in fastening torque at the time of paint baking, thereby maintaining the rust preventive effect for a long time. Further, the base fabric prevents the film forming the release layer from being damaged, and the rust-proof seat sheet is peeled from the central portion when removing both members, so that the rust-proof resin layer is peeled from the mounting seat surface of both members. The mounting seat surface is completely covered without rusting. (Embodiment) FIG. 2 shows a hinge (attachment member) on a door panel (attachment member) 4 using the rust-proof seat sheet 1 shown in FIG.
FIG. 5 is a cross-sectional view showing a state where the door panel 5 is mounted, wherein the rust-proof seat sheet 1 is cut to be about 1 mm larger than the mounting seat surface 5a of the hinge 5 and is attached to the mounting seat surface 5a. Is mounted on the mounting seat surface 4a. In this state, a bolt 6 is inserted into the screw holes 4b, 5b and 1c provided in the door panel 4, the hinge 5 and the rust-proof seat surface sheet 1, and a nut 8 is screwed through a washer 7 and tightened. The thickness of the seat sheet 1 gradually decreases, and the thickness T becomes T ′, and the seat sheet 1 does not become thinner any more. At this time, the nonwoven fabrics 2a, 2a serving as the base fabric of the rust-preventive resin layer 2 function as spacers, and prevent the rust-preventive resins 2b, 2b from protruding outside. Next, in the vehicle body painting process, degreasing and zinc phosphate conversion treatment are performed, and the rust preventive resin 2b, 2b of the rust preventive seat sheet 1 is softened and welded by electrodeposition coating and baking, and the door panel 4 and the hinge 5 are attached. The seating surfaces 4a and 5a and the end surface 5c of the hinge 5 are completely covered,
a, 5a and the end face edge 5c are rustproofed. At this time, since the nonwoven fabrics 2a, 2a prevent the rust-preventive resin 2b, 2b from excessively protruding or flowing out, there is no occurrence of seal breakage or thin coating, direct contact between members can be prevented, and the hinge of the door panel 4 can be prevented. The rust prevention effect around the mounting part is greatly improved. FIG. 3 shows the door panel 4 for repair or door replacement.
FIG. 3 shows a state in which the hinge 5 is removed from the door panel 4.
Even when a local load is applied to the rust-preventive seat sheet 1 between the hinge and the hinge 5, the seat sheet 1 separates from the central release layer 3 and the rust-preventive resin layers 2, 2 Member mounting seat surface 4a
Since it is completely covered without peeling off from the interface with 5a and 5a, a high rust prevention effect can be maintained after removing both members as before. [Effects of the Invention] As described above, the rust-preventive seat sheet according to the present invention has a release layer at the center, and a rust-preventive resin layer impregnated with a rust-preventive resin in the base cloth on both sides thereof. Since the base fabric has a multi-layer structure, the base cloth holds the rust-preventive resin to prevent the resin from flowing out, eliminates seal breakage and direct contact between members, and minimizes a decrease in fastening torque due to paint baking. As well as preventing the release layer from being damaged, so that the rust-preventing effect of the member mounting portion is maintained for a long period of time, and the rust-preventive resin layer is removed from the interface between the two members when the two members are removed. Since it is separated from the peeling layer at the center without peeling, it exhibits an excellent effect that the rust prevention effect is not impaired even after the member is removed.

[Brief description of the drawings]

1 is a cross-sectional view showing the structure of a rust-proof seat sheet according to the present invention, FIG. 2 is a cross-sectional view showing a state where a hinge is attached to a door panel using the rust-proof seat sheet shown in FIG. 1, Third
FIG. 4 is a cross-sectional view showing a state in which a hinge is removed from the door panel shown in FIG. 2, and FIG. 4 is a graph showing the effect of the peeling layer thickness tp on the shear strength of the rust-proof seat sheet according to the present invention. Fig. 5 shows a graph, a sixth diagram the relation between the total thickness T and the adhesive strength of the rust seat sheet according to the present invention showing the effect of the base fabric thickness t _F on the fastening torque ratio between the front and rear bake FIG. 7 is a graph illustrating the relationship between the total thickness T of the rust preventive seat sheet according to the present invention and the amount of resin protrusion,
8 and 9 are cross-sectional explanatory views showing a conventional member mounting state, and FIGS. 10 (a) and 10 (b) are perspective views showing shapes of a conventional seat rust preventive material. 1 rust-proof seat sheet 2 rust-proof resin layer 2a base fabric 2b rust-proof resin 3 release layer 4 door panel (member to be mounted) 5 hinge (Mounting member).

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-203007 (JP, A) JP-A-62-171587 (JP, A) JP-A-62-85940 (JP, A) 155678 (JP, U) Japanese Utility Model 63-178132 (JP, U) Japanese Utility Model Application Hei 2-112428 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F16B 43/00

Claims (2)

(57) [Claims] An interposed member between an attachment member and a member to be attached,
A rust-proof seat sheet for rust-proofing the mounting seat surface of both members, which has a release layer at the center and a rust-proof resin layer impregnated with a rust-proof resin on the base fabric on both sides thereof. A rust-proof seat sheet characterized by the following. 2. The method according to claim 1, wherein said release layer and said base cloth have a thickness of 18
The rust-proof seat sheet according to claim 1, wherein the thickness of the rust-proof seat sheet is from 0.3 to 0.7 mm.