JP2009092113A - Shock absorbing material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sufficient function by manufacturing without using a vinyl chloride resin, in a shock absorbing material used as a soft edge such as for a desk. <P>SOLUTION: This shock absorbing material 11 is provided by forming a surface layer 14 composed of an ethylene-methacrylic acid copolymer ionomer resin in a surface part exposed to a surface in use. An end part of the surface layer part has an extending part 15 entering up to an inside position contacting with an article when installed on the article being an installation object such as the desk. The ethylene-methacrylic acid copolymer ionomer resin also prevents stickiness, damaging and a stain of the surface by bleeding. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cushioning material that is used by being attached to, for example, a corner portion of various articles such as a desk, a table, and a bulletin board. More specifically, the present invention relates to a cushioning material that can achieve PVC (vinyl chloride resin) and has good performance.

  Although vinyl chloride resin has been used for the buffer material as in the above-mentioned example, since vinyl chloride resin contains a plasticizer and chlorine, it has been refrained from use because harmful gases are emitted during incineration.

  For this reason, for example, a cushioning material as disclosed in Patent Document 1 below is used. The cushioning material disclosed in Patent Document 1 uses an olefin-based resin that can be incinerated in place of the vinyl chloride resin.

  However, in the buffer material in which the olefin-based resin appears on the surface, there is a problem that the surface is easily sticky because the oil easily bleeds (seeps, volatilizes and migrates). In addition, there were also problems of being easily scratched and easily soiled. Scratches and dirt are likely to occur during assembly as well as during the manufacture in which the cushioning material is attached to the article, in this case, and in this case, the commercial value has been lost or reduced.

JP 2000-158608 A

  In this regard, in the buffer material made of vinyl chloride resin, the hardness and elasticity can be appropriately set according to the amount of plasticizer added, and even if it is rubbed against other articles, it will not be damaged. There was an advantage that it looked good. On the other hand, when having an olefin resin on the surface, it must be said that it is inferior to that made of vinyl chloride resin in terms of performance due to the occurrence of stickiness, scratches and dirt as described above. He was at a loss between environmental preservation and ensuring functionality. For this reason, early development of a better cushioning material has been desired.

  Accordingly, an object of the present invention is to obtain a cushioning material having good performance without using a vinyl chloride resin.

  A means for that is a cushioning material made of synthetic resin that is used by being attached to an article, and is a cushioning material in which a surface layer portion made of an ethylene-methacrylic acid copolymer ionomer resin is formed on a surface portion exposed to the surface at the time of use. is there.

  In this cushioning material, the surface layer is exposed to the surface during use. That is, the surface layer portion appears on the surface during the buffering action and comes into contact with other articles. And the ethylene-methacrylic acid copolymer ionomer resin which comprises a surface layer part has moderate elasticity and a softness | flexibility, although it is tough. Also, it has good transparency, excellent stress cracking properties, oil resistance, wear resistance, and cold resistance, and bleed is less likely to occur than in the case of olefin resins. For this reason, it has these characteristics.

About said component, it can comprise in the following aspects, for example.
One of the aspects is a cushioning material in which an extended portion is formed at an end portion of the surface layer portion so as to enter an inner position that contacts the article when attached to the article. The extension part is not only the surface exposed to the surface when in use, but also the inner body part that is formed at the end of the surface layer part so as to wrap around or cover the part hidden inside, and to be covered by the surface layer part If bleed occurs on the surface, oil seepage is suppressed.

  In this case, the extending portion may be formed with an engaging portion that engages with the main body portion that covers the surface layer portion. For example, the engaging portion may be formed by a hook structure having an appropriate shape such as unevenness, and in the case of unevenness, the engaging portion may have a recess in either the surface layer portion or the main body portion. The engaging part enhances the unity with the main body part.

  Another aspect of the present invention is a cushioning material in which an engagement portion that engages with a main body portion covered with the surface layer portion is formed inside the surface layer portion. Also in this case, the engaging portion enhances the integrity between the surface layer portion and the main body portion.

  In these cases, the engaging portion may be formed by dovetail irregularities. Since it has a dovetail shape, it can actively counter the force applied in the separating direction.

  As described above, according to the present invention, at least the surface appearing on the surface at the time of use suppresses the occurrence of bleed, scratches and dirt, so that the performance necessary as a cushioning material can be provided.

  Moreover, since the ethylene-methacrylic acid copolymer ionomer resin constituting the surface layer portion does not contain chlorine, no harmful gas is generated even when incinerated. For this reason, if the material used for the main body part covered by the surface layer part does not generate harmful gas even if incinerated, the object of preventing the generation of harmful gas can be achieved.

  Thus, both PVC can be secured and functionality can be ensured, and this is an effective measure to save the mold.

An embodiment for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view of the cushioning material 11, which is used by being attached to a corner portion of various furniture such as the top plate 22 of the conference table 21 as shown in FIG. Soft edge. As shown in FIG. 3, the attachment is performed by fitting the protruding piece 12 provided in a part into a groove 23 formed on the side surface of the top plate 22.

  Such a buffer material 11 is long and is formed by extrusion molding. The cross-sectional shape is substantially T-shaped, and the portion extending downward is the protrusion 12 described above. The protrusion 12 is formed with a plurality of protrusions 12a for increasing the frictional resistance to prevent the protrusion 12a from extending in the length direction.

  And the part extended from the upper end of the protrusion 12 to the both right and left sides is the buffer part 13 as a part which fulfill | performs a buffer function substantially, and is formed in the plate shape which draws a loose circular arc shape. As shown in FIG. 3, the buffer 13 covers the outer peripheral surface 22 a of the top plate 22 when attached.

  The protruding piece 12 and the buffer portion 13 are formed of an olefin-based soft resin that does not generate harmful gas even when incinerated, but the front portion exposed to the table when used in the buffer portion 13 is made of another material. The surface layer portion 14 is integrally formed by coextrusion. The thickness of the surface layer portion 14 may be very thin, specifically, for example, about 0.3 to 0.5 mm.

  That is, the surface layer portion 14 is formed on the upper surface 13a that draws a loose arc shape in the buffer portion 13 and the left and right side surfaces 13b and 13b that continue from there. In addition, the surface layer portion 14 is integrally formed with an extending portion 15 that enters the inner position where the outer surface 22a of the top plate 22 comes into contact with the top plate 22 when attached to the top plate 22. That is, the extending portion 15 is formed from the lower ends of the left and right side surfaces 13b, 13b in the buffer portion 13 to the inside, that is, toward the protruding piece 12. The length of the extended portion 15 may be set as appropriate.

  As shown in an enlarged view in FIG. 1, the extended portion 15 is formed with an engagement portion 15 a having a dovetail shape and is coupled with the buffer portion 13 with strong integrity. In the illustrated example, the dovetail groove 13c is formed on the buffer portion 13 side, but the dovetail groove can also be provided on the extending portion 15 side.

  Moreover, the extending part 15 can be made into various forms, as shown in FIG. For example, the extending portion 15 in FIG. 4A is formed to extend the claws obliquely with respect to the corner portion of the buffer portion 13. The extended portion 15 in FIG. 4B is formed so as to have a cross-sectional shape in which the tip is hooked on a corner portion 13d of the buffer portion 13 formed in an arc shape in cross section, and the entire portion is hooked. FIG. 4C is an example in which the extending portion 15 is extended. That is, the extending portion 15 is formed on the entire buffer portion 13 or the entire main body portion 16 including the buffer portion 13 and the projecting piece 12. In FIG. 4C, for the sake of convenience, only a part of the buffer portion 13 is illustrated, and the entire buffer material 11 is not illustrated.

Next, another example will be described. In this description, the same or equivalent components as those in the above configuration are denoted by the same reference numerals and detailed description thereof is omitted.
FIG. 5 is a perspective view of the cushioning material 11 according to another example. The cushioning material 11 is used by being attached to the outer periphery of the bulletin board 31 as shown in FIG. 6, for example.

  This buffer material 11 is also long and formed by extrusion molding. The cross-sectional shape is a substantially L-shape having a substantially semicircular edge 17 and a surface 18 extending in a direction perpendicular to the width direction of the edge 17 from one side (front side) of the edge 17. . The edge portion 17 covers the outer peripheral surface of the bulletin board main body 32 when the inner side surface of the surface portion 18 is fixed to the outer peripheral edge surface of the bulletin board main body 32. The main body portion 16 including the edge portion 17 and the surface portion 18 is made of an olefin-based soft resin.

  Appropriate gaps 16a are formed inside the main body 16, and in addition to the material elasticity of the main body 16 itself, cushioning is also provided due to the presence of the gaps 16a.

  A band-shaped reinforcing plate portion 19 made of a soft synthetic resin is formed on the inner side surface of the surface portion 18 by extrusion molding simultaneously with the main body portion 16. A dovetail-shaped opening groove 16 b that opens to the outer surface is formed at a position corresponding to the reinforcing plate portion 19. The opening groove 16b is a portion for driving a nail member x (see an imaginary line in FIG. 5) for fixing to the bulletin board main body 32. After fixing, the opening groove 16b is a tube made of a soft synthetic resin so as to conceal the nail member x. This is a part to be fitted with a concealing member y (see phantom line in FIG. 5).

  In the cushioning material 11 having such a cross-sectional shape, the surface layer portion 14 is formed on the outer surface of the edge portion 17 and the surface portion 18. Since the above-described opening groove 16b is formed in the surface portion 18, the surface layer portion 14 is formed at two locations sandwiching the opening groove 16b.

  And as above-mentioned, the extension part 15 which penetrates into an inner side is integrally provided in the edge part of these two surface layer parts 14 and 14, and the extension part 15 is engagement which consists of dovetail-shaped unevenness | corrugation. Part is formed.

  In the buffer member configured as shown in FIGS. 1 and 5 described above, the main body 16 acts as a buffer at the corners of the top plate 22 and the bulletin board main body 32 by its own material elasticity and the gap 16a. . Similarly, the surface layer portion 14 formed on the surface portion exposed to the surface also acts as a buffer. And since this surface layer part 14 consists of ethylene-methacrylic acid copolymer ionomer resin, the characteristic is exhibited. That is, the ethylene-methacrylic acid copolymer ionomer resin has moderate elasticity and flexibility while being tough as described above. Also, it has good transparency, excellent stress cracking properties, oil resistance, wear resistance, and cold resistance, and bleed is less likely to occur than in the case of olefin resins. For this reason, it is possible to impart resistance to scratches and dirt that should be provided as the surface layer of the cushioning material 11. In addition, the oil has no blur and is not sticky. Therefore, a sufficient function as the buffer material 11 can be provided.

  As a result, not only is it not damaged or soiled during use, but also unexpected damage can be prevented when the cushioning material 11 is assembled in the manufacturing process of the conference table 21 and the bulletin board 31, and the loss or decline of the commercial value is eliminated. be able to. Further, since the parts appearing on the table are not easily damaged, the assembling work can be easily performed without paying close attention, and the workability is improved.

  Moreover, since neither the main body part 16 nor the surface layer part 14 emits harmful gases when incinerated, it is also effective in terms of conservation of the natural environment.

  Further, since the extending portion 15 is formed in the surface layer portion 14, the integrity with the main body portion 16 is improved, and when bleed occurs in the main body portion covered with the surface layer portion 14, the oil content is returned to the surface. Exudation can be suppressed.

  Furthermore, since the engaging portion 15a is formed in the extended portion 15 and high unity is obtained with the main body portion 16, there is no inconvenience such as unexpected peeling, for example, the material constituting the main body portion 16 Even if the compatibility with is not good, production by coextrusion molding becomes possible.

In correspondence between the configuration of the present invention and the configuration of the above-described embodiment,
The article of the present invention corresponds to the conference table 21 and the bulletin board 31 described above,
The main body portion corresponds to the main body portion 16 or the buffer portion 13,
The present invention is not limited to the above-described configuration, and other forms can be adopted.
For example, the cushioning material may be formed by injection molding.
Further, the engaging portion can be formed in the extended portion bulge portion.

The perspective view of a shock absorbing material. The perspective view of the table for meetings provided with the shock absorbing material. FIG. Sectional drawing which shows the other example of an extending part. The perspective view of the shock absorbing material which concerns on another example. The perspective view of the bulletin board provided with the shock absorbing material.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Buffer material 13 ... Buffer part 13c ... Dovetail groove 14 ... Surface layer part 15 ... Extension part 15a ... Engagement part 16 ... Main-body part 21 ... Conference table 31 ... Bulletin board

Claims (5)

It is a cushioning material made of synthetic resin used by being attached to an article,
A cushioning material in which a surface layer portion made of an ethylene-methacrylic acid copolymer ionomer resin is formed on a surface portion exposed to the surface during use. The cushioning material according to claim 1, wherein an extending portion that enters an inner position that comes into contact with an article when attached to the article is formed at an end of the surface layer portion. The shock absorbing material according to claim 1 or 2, wherein an engagement portion that engages with a main body portion covered with the surface layer portion is formed inside the surface layer portion. The cushioning material according to claim 2, wherein an engaging portion that engages with a main body portion that is covered with a surface layer portion is formed in the extending portion. The shock-absorbing material according to claim 3 or 4, wherein the engaging portion is formed with dovetail irregularities.

Images