JP2009226786A - Gel thin plate-like cushioning material and manufacturing method of the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an appropriate manufacturing method of a thin plate member by an impact absorbing gel material, and a gel thin plate-like cushioning material appropriately molded by the manufacturing method. <P>SOLUTION: In the molding method of the gel thin plate-like cushioning material by injection molding from a raw material of the impact absorbing gel material, an injection molding mold is used for injection molding, the die having an inner face subjected to silicon-based film formation for increasing the mold releasability for molding a sheet thinner than a diameterical dimension of a runner of the injection molding die. The method allows suitable manufacturing of the gel thin plate-like cushioning material incorporatable into various structures. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a gel-like thin cushioning material using a gel-like shock absorbing material having an extremely high elastic elongation rate that can be restored and an extremely high shock absorbing rate, and a method for producing the same.

  Gel-like shock absorbers have been developed for use as cushioning materials that absorb shocks and vibrations by utilizing their extremely high elongation and shock absorption properties.

For example, in the case of an olefin-based resin gel, this gel-like shock absorber allows elastic deformation to an elongation of about 1300%, and drops a 110 g steel ball from a height of 100 mm at a thickness of 5 mm or more. In this case, the physical properties are such that the shock absorption rate is 90% or more.
Therefore, the gel-like impact absorbing material is a material having extremely high flexibility. In addition, other physical properties such as chemical resistance, heat resistance, and insulation are comparable to ordinary resins.

  In the case of the use as a shock absorbing material by the gel-like shock absorbing material, a plate-shaped shock absorbing material having a thickness of 5 mm or more has been conventionally manufactured from the idea that the shock is absorbed by a predetermined thickness. That is, it is presumed that the plate-like cushioning material by the gel-like shock absorbing material having a thickness smaller than that basically did not exist.

Further, there is a common recognition that gel-like impact absorbing materials are not highly suitable for injection molding because they are highly sticky and gel-like and inferior in formability, and have been exclusively formed into plates by extrusion molding.
However, depending on the extrusion molding, it is difficult to produce a thin product having a thickness of 3 mm or less in a uniform thickness, which has been confirmed by the present applicant. This is presumably because the gel-like impact absorbing material is in a gel state even in a solidified state, and is inferior in formability that easily deforms when an external force is applied.

  It was estimated that there was no thin plate-like member having a thickness of 3 mm or less with respect to the gel-like shock absorber because there was no request for such a gel-like shock absorber or a thin plate-like member. The

However, even if this gel-like shock absorbing material is a thin plate-like member having a thickness of 2 mm or less, for example, the present applicant shows that the gel-like shock absorbing material exhibits high absorption performance related to shock and vibration depending on the incorporated member and the structure of the device. confirmed.
However, a manufacturing method itself for forming a thin plate member using such a gel impact absorbing material has not been proposed so far, and the development of an appropriate manufacturing method has been a problem.

In addition, since the gel-like impact absorbing material is sticky, a rod-shaped holding object holder using the property has been disclosed by the present applicant. According to the rod-shaped gripping object holder, the mounting portion is detachable with respect to the rod-shaped gripping object, and the fixing plate is provided with a gel-like shock absorber as an adhesive member on the surface and pivotally attached to the mounting portion. (See Patent Document 1).
According to this, it is possible to hold a rod-like grasped object such as a cane in an upright state regardless of the shape or material of the structure where there is a structure such as a desk or wall in the vicinity.
Utility Model Registration No. 3132718 (1st page, Fig. 1)

A problem to be solved with respect to the gel-like thin buffer material and the manufacturing method thereof is that a manufacturing method itself for forming a thin plate member using a gel-like shock absorber has not been proposed.
Accordingly, an object of the present invention is to provide an appropriate manufacturing method for forming a thin plate-like member made of a gel-like shock absorber, and a gel-like thin plate-like cushioning material appropriately formed by the manufacturing method.

The present invention has the following configuration in order to achieve the above object.
According to one embodiment of the method for producing a gel-like thin cushioning material according to the present invention, a method for molding a gel-like thin cushioning material from a raw material of a gel-like shock absorbing material by injection molding, Injection molding is performed using an injection mold having an inner surface that has been subjected to a silicon-based film treatment for improving mold releasability so as to be molded into a sheet that is thinner than the diameter of the runner of the mold.

  Moreover, according to one form of the gel-like thin buffer material concerning this invention, it is shape | molded by the manufacturing method of the said gel-like thin buffer material, It is characterized by being 2 mm or less in thickness, It is characterized by the above-mentioned. it can.

  Moreover, according to one form of the gel-like thin buffer material concerning this invention, the said gel-like shock-absorbing material is the gel of the olefin resin whose elastic elongation rate which can be restored | restored is 200% or more, It is characterized by the above-mentioned. can do.

  Moreover, according to one form of the gel-like thin-plate-shaped buffer material concerning this invention, it can be characterized by using closely_contact | adhering to a highly brittle member etc. so that an impact and a vibration may be absorbed.

  Moreover, according to one form of the gel-like thin buffer material concerning this invention, the said gel-like shock-absorbing material has adhesiveness, and fixes to-be-adhered objects mutually so that it may replace with a double-sided adhesive tape etc. It can be characterized by having fixing properties.

  According to the gel-like thin buffer material and the method for producing the same according to the present invention, a thin plate-like member made of a gel-like shock absorber can be preferably produced, and a gel-like thin buffer material can be suitably provided. There is an effect.

  BEST MODE FOR CARRYING OUT THE INVENTION The best embodiment of the gel-like thin cushioning material and the method for producing the same according to the present invention will be described below in detail. FIG. 1 is a cross-sectional view showing the structure of a double-sided mirror in which a glass mirror, which is a brittle material, is arranged on both sides as an example of using a gel-like thin buffer material.

  According to the method of forming a gel-like thin buffer material by injection molding from the raw material of the gel-like shock absorber according to the present invention, so as to form a sheet thinner than the diameter dimension of the runner of the injection mold, Injection molding is performed using an injection mold having an inner surface that has been subjected to a silicon-based film treatment for improving mold releasability.

  Gel-like shock absorbers are highly adhesive even in the molten resin state, so the fluidity in the cavity of the injection mold is low and difficult to mold. It is a difficult material. For this reason, it was conventionally considered difficult to mold by injection molding. In particular, it is presumed that there has been no example of forming into a sheet shape of 3 to 5 mm or less thinner than the diameter of the runner, or a sheet of 2 to 3 mm or less that cannot be manufactured by extrusion.

  On the other hand, according to the method of using an injection mold having an inner surface on which a silicon-based film treatment for improving the mold releasability of the present invention is used, the above-mentioned problems can be solved. That is, a gel-like thin cushioning material having a thickness smaller than the diameter of the runner and a gel-like thin cushioning material having a thickness of 2 mm or less could be suitably formed and produced.

  This is because the inner surface of the silicon-based injection-molded mold has a good compatibility with the gel-like shock absorber, and not only improves the mold releasability but also the cavity of the gel-like shock absorber in the molten resin state This is thought to be due to the effect of increasing the internal fluidity.

According to this, the primary meaning of the present invention is that the present inventor has found that the gel-like thin plate-like cushioning material can be appropriately molded by injection molding.
And if the method concerning this invention was used, the sheet-like gel-like thin-plate-shaped buffer material about 0.5 mm in thickness was able to be shape | molded and manufactured appropriately.

The gel-like impact absorbing material, which is a resin raw material molded by this method, is preferably, for example, an olefin resin gel having a recoverable elastic elongation of 200% or more.
This olefin-based resin gel exhibits special physical properties as described in the background section, and can absorb shocks and vibrations with a very high absorption rate.
The impact absorbability can be expected to be high even if the gel-like thin buffer material has a thickness as thin as 2 mm or less.

Moreover, the gel-like thin buffer material according to the present invention is preferably used in close contact with a highly brittle member or the like so as to absorb impact and vibration.
For example, as shown in FIG. 1, glass mirrors 20 and 21, which are brittle materials, are bonded to both surfaces with a gel-like thin buffer material 10 interposed therebetween to form a double-sided mirror. Reference numeral 30 denotes an exterior member, which has an outer peripheral edge so as to wrap around the edge of the double-sided mirror.

By incorporating the gel-like thin cushioning material 10 in this way, the impact applied to the mirrors 20 and 21 of each glass was relieved very well, and breakage could be suitably prevented.
However, the present invention is not limited to this, and the gel-like thin cushioning material 10 is thin, so that it can be suitably applied to various structures and can be applied as a cushioning material in a wide field.

  Further, the gel-like impact absorbing material may be sticky, and may have a fixability to fix the objects to be adhered to each other so as to replace the double-sided adhesive tape or the like. According to this, it can utilize suitably not only as a mere impact-absorbing material but as a fixing member by adhesion.

Originally, an olefin resin gel or the like has a property of being sticky and having good peelability. Therefore, by utilizing the characteristics and making it a thin plate, it can be used as a tape-like fixing member by shock absorbing material and adhesion by one gel-like thin buffer material.
As a result, what is conventionally composed of at least three layers of shock absorbing material and adhesive on both sides can be made into one member (gel-like thin buffer material), and the manufacturing cost of such a product Etc. can be reduced.

  Further, the gel-like thin cushioning material according to the present invention is not a mere shock absorbing material, but uses a thin wall to make a watertight or airtight packing or gasket, an insulating material, or a thin and tightly bonded material. Therefore, it can be suitably used as an adhesive member that enhances heat conduction.

  Further, the shape of the gel-like thin buffer material is not limited to a flat thin plate shape, but may be a form in which a through hole, a notch or an unevenness is provided. According to this, the further improvement of buffer performance and adjustment of adhesive force can be performed suitably.

  As described above, the present invention has been described in various ways with preferred embodiments. However, the present invention is not limited to these embodiments, and many modifications can be made without departing from the spirit of the invention. That's it.

It is sectional drawing which shows the usage example of the gel-like thin-plate buffer material concerning this invention.

Explanation of symbols

10 Gel-like thin plate cushioning material 20 Mirror 21 Mirror 30 Exterior member

Claims (5)

  This is a method of forming a gel-like thin buffer material from the raw material of a gel-like shock absorber by injection molding, and has a mold release property so as to be formed into a sheet shape thinner than the diameter dimension of the runner of the injection mold. A method for producing a gel-like thin cushioning material, characterized in that injection molding is performed using an injection mold having an inner surface that has been treated with a silicon-based coating for improvement.   A gel-like thin buffer material, which is formed by the method for producing a gel-like thin buffer material according to claim 1 and has a thickness of 2 mm or less.   3. The gel-like thin buffer material according to claim 2, wherein the gel-like shock absorbing material is an olefin resin gel having a recoverable elastic elongation of 200% or more.   The gel-like thin buffer material according to claim 2 or 3, wherein the gel-like thin buffer material is used in close contact with a highly brittle member or the like so as to absorb impact or vibration.   The gel-like shock absorber according to claim 2, 3 or 4, wherein the gel-like shock absorbing material is sticky and has a fixability to fix the objects to be adhered to each other so as to replace a double-sided adhesive tape or the like. Thin buffer material.

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