JPS61119269A - Production of deodorizing sheet - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a deodorizing sheet.

<Prior Art> Conventionally, deodorizers are generally used while being housed in bags made of nonwoven fabric or the like.

In order to produce a sheet-shaped deodorizing agent, for example, a method of distributing a powder or granular deodorizing agent onto a pressure-sensitive adhesive sheet is a simple method, but this method is expensive and the deodorizing agent easily peels off.

There is also a method of mixing a powder or granular deodorizer with a solution or molten resin and applying it onto the base sheet.
Since the surface of the deodorizer is covered with resin, the deodorizing effect is significantly reduced.

<Problems to be Solved by the Invention> An object of the present invention is to provide a method for producing a deodorizing sheet that is inexpensive to produce, does not cause the deodorizing agent to peel off, and does not reduce its deodorizing effect.

Means for Solving the Problems> In order to achieve the above-mentioned objects, the present invention provides a method in which a thermoplastic resin in the form of powder, granules or fibers and a deodorizing agent in the form of powder or granules are sprinkled on a base sheet. The present invention provides a method for manufacturing a deodorizing sheet (first invention), which is characterized in that the sheets or materials capable of forming a sheet are then laminated by heating, and a portion or the entire surface thereof is heated to integrate the sheets.

In addition, the present invention involves laminating a material that can be formed into a sheet by heating on a releasable sheet, and then sprinkling a powder or granular deodorizer, and then laminating the sheet or a material that can be formed into a sheet by heating. Provided is a method for producing a deodorizing sheet (second invention), characterized in that the -S portion or the entire surface is heated and integrated.

The difference between the first invention and the second invention is whether a pre-formed sheet such as paper is used as the base sheet, or whether a deodorizing agent is applied at the same time as the sheet is formed,
In either case, a deodorizing sheet with a deodorizing agent sandwiched between two sheets is obtained, but either the base sheet or the other sheet may be heated to form a sheet. If you use materials to form this into a sheet, it will end up inside another sheet and the boundaries between them will disappear. .

Hereinafter, the first invention and the second invention will be sequentially explained.

First invention In the first invention, paper, cloth, nonwoven fabric, plastic film, or plastic sheet can be used as the base sheet.

Polyester, polypropylene, polyamide, etc. can be used as powder, granule, or fibrous thermoplastic resin, and powder or granule deodorizers are commercially available under the trade names of activated carbon, cyclodextrin, or ani=. A mixture of ascorbate and ferrous sulfate heptahydrate can be used.

The thermoplastic resin and the deodorizing agent may be mixed and sprayed onto the base sheet, or may be sprayed in any order.

The sheet stacked on top of this may be paper, cloth, nonwoven fabric, plastic film, or plastic sheet, but if the base sheet is not breathable, this sheet must be breathable. If this sheet does not have air permeability, the base sheet needs to have air permeability.

In addition, when applying a material that can be formed into a sheet by heat over the thermoplastic resin and odor agent, this material may be a mixture of fibers such as pulp or rayon and thermoplastic resin powder, nylon or polyester. Alternatively, it is a thermoplastic fiber such as polypropylene, and the former is formed by melting thermoplastic resin powder by heat and joining the fibers to form a sheet, while the latter is joined by melting the surfaces of the thermoplastic fibers by heat.

After the base sheet, the thermoplastic resin, the deodorizer, the sheet, or the material capable of forming the sheet are laminated in this manner, they are heated and integrated. Integration is achieved by melting the powder, granules, or fibrous thermoplastic resin mixed in the deodorizer and bonding the base sheet and another sheet together, but as mentioned above, the sheets are bonded together by heat. The material to be formed also becomes a sheet at this time.

In addition, when the sheet laminated on the thermoplastic resin and deodorizer is paper, cloth, nonwoven fabric, plastic film, or plastic sheet that has been formed into a foot shape in advance, it is not necessary to heat the entire surface, but only a portion of the sheet. It is sufficient to glue at the lever part.

Second invention In the second invention, the releasable sheet is a sheet material whose surface has been subjected to a release treatment such as silicone treatment or fluororesin treatment, such as an endless belt passed between two rolls. .

The material that can be laminated onto this releasable sheet to form a sheet by heating is a mixture of fibers such as pulp or rayon and thermoplastic resin powder, nylon, polyester, or It is a thermoplastic fiber such as polypropylene.

The powdered or granular deodorizing agent described in the first invention is sprinkled on this, but at this time, it is not necessary to spray the powdered, granular or fibrous thermoplastic resin. This is because the adhesion between the sheets is achieved by the materials described above that can be formed into sheets by heat.

A sheet or a material that can be formed into a sheet by heating is laminated on top of the deodorizer, and the entire surface is heated. The purpose of heating is to convert the material forming the sheet into a sheet, and to fix the deodorizer between the sheets and integrate them.

The deodorizing sheet thus obtained has a structure in which the deodorizing agent is sandwiched between two sheets, but the deodorizing agent may enter the inside of the sheet and the boundary between the deodorizing agent layer and the sheet may not be clear.

If necessary, heat embossing may be performed after this.

This heated embossing allows the deodorizer to be fixed even better.

Common matters In both the first invention and the second invention, the heating is 120
The thermoplastic resin in the form of powder, granules, or fibers must not completely melt and flow.

Further, the obtained deodorizing sheet has a shape in which the deodorizing agent is fixed between two sheets, and the surface of the deodorizing agent is not covered with resin or the like.

Effectiveness> As is clear from the above, the deodorizing sheet according to the present invention has a deodorizing effect even though it is in the form of a sheet, and the deodorizing agent does not peel off, and the surface of the deodorizing agent is not covered with resin etc. It is excellent and can be manufactured at low cost.

<Example 1> Composition (5) consisting of the following composition was spread on a mixed paper of polyniterene, pulp and rayon using 81i1/go.

Composition powder deodorizer (Anico; manufactured by Aniko ■) 50wt part low-density polyethylene powder (NEO30H; manufactured by Mikata Polychemical ■) 5QW
A similar mixed paper was layered on top of the t section, and heated at 200°C and 200°C.
f/, '6111, the entire surface was heated and pressurized for several seconds to integrate.

I carried this deodorizing sheet around with me, but the deodorizing agent did not move or fall off.

To test the deodorizing ability, 0.5 cc of ammonia 28% aqueous solution and 3001 ml of air were placed in a bag. tl and deodorizing sheet 0.
When the ammonia gas concentration inside was measured after 3 hours, the ammonia gas concentration was only 7% compared to the case without the deodorizing sheet.

Patent A ryojin

Claims (1)

[Claims] 1) After spraying a powder, granule or fibrous thermoplastic resin and a powder or granular deodorizer on a base sheet, a sheet or a material that can be formed into a sheet by heating is laminated. A method for producing a deodorizing sheet, which comprises heating a portion or the entire surface of the sheet to integrate the sheet. 2) Layer a material that can be formed into a sheet by heat on a releasable sheet, sprinkle a powder or granular deodorizer on top of the releasable sheet, then laminate the sheet or a material that can be formed into a sheet by heat, and heat the entire surface. A method for manufacturing a deodorizing sheet, characterized in that the deodorizing sheet is integrated.