JP2000238833A - Paper band for packing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper band which can be used even in an automatic packing machine for a plastic band and also which can be recycled by processing a recyclable paper band so that it can be heat-bonded. SOLUTION: A mixture liquid comprising 0.5 to 10% of plasticizer, 0.1 to 15% of lithium chloride and 0.05 to 5% of Turkey red oil mixed into 5 to 18% of adhesive solution of polyvinyl alcohol completely saponified substance (degree of daponification of 90% or more) or a mixture liquid with an anti-foaming agent further added to the above liquid is applied on a surface of a paper band and dried.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper band for packing.

[0002]

2. Description of the Related Art A paper band conventionally used as a packing material has a partially-saponified polyvinyl alcohol on the surface.
Water solution (mainly used on the back side of stamps and generally called water glue), and a band is formed by applying water or a liquid containing water to the glue surface. The bonding effect is obtained by, for example, matching the both ends of the device.

[0003]

Disadvantages of the prior art In the past, packing machines that could be automatically bonded by this method were also available, but the application of water was inaccurate, inconsistent, and seasonal (such as changes in humidity and temperature. ) May cause poor adhesion, etc.
Therefore, at present, all packing with paper bands is performed manually, and efficient work cannot be performed.

Further, since a partially saponified polyvinyl alcohol aqueous solution (water glue) is used, adhesion of moisture tends to cause blocking between paper bands, which may hinder the operation. . Further, when stored in a high temperature state, there is a disadvantage that mold is easily generated.

As described above, since the conventional paper band has various problems, the band for packing is made of plastic, and has been developed today with the development of an automatic packing machine that adheres by heat.

However, disposal of the plastic band after use has many environmental problems such as generation of toxic gas, and has drawbacks such as the inability to recycle.

[0007]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a paper band which is made of a recyclable paper band so as to be heat-bondable, that is, a paper band which can be used in an automatic packing machine for plastic bands and which can be recycled. What you want to do.

[0008]

According to the present invention, 5% of a completely saponified product (polyvinyl alcohol (hereinafter referred to as PVA)) (having a saponification degree of 90% or more) is provided on the surface of a paper band main body. ~
Glycerin or di-glycerin 0.5% to 10% as a plasticizer, 0.1% to 15% of lithium chloride, and 0.05% to 5% of lotus oil are mixed with an 18% adhesive solution. The mixed solution was applied.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to the following Examples. A number of twisted paper strands are arranged side by side and fixed on the surface of a paper band body with an adhesive. Degree 9
0% or more. ) 5% to 18% adhesive solution, plasticizer
Glycerin or diglycerin 0.5% to 10%, lithium chloride 0.1% to 15%, lotus oil 0.05% to 5
% Is applied and dried.

When the degree of saponification of PVA is lower than 90%, the water resistance is lowered and it is not suitable as a packing material, and it is completely saponified with polyvinyl alcohol (90% or more saponification degree). If the addition amount is less than 5%, the adhesive strength is lowered, and
%, Productivity may deteriorate, and the viscosity may become high, which may hinder the coating operation. Preferably 8% to 13
%. In the case of an adhesive solution out of the range, even if the added amount of the plasticizer, lithium chloride, and roto oil is adjusted, poor adhesion or variation in adhesive strength occurs, making it difficult to use as a packing material. .

As the shape of the paper band main body, any of a number of twisted paper strings arranged side by side and bonded, a type obtained by folding and bonding long paper, or a type obtained by bonding a paper core wrapped with paper may be used.

The purpose of mixing a plasticizer, for example, glycerin or diglycerin 0.5% to 10%, is to provide a moisturizing effect even after the paper band becomes a product, and to improve the adhesive strength in heat sealing. To enhance. If it is less than 0.5%, the adhesive strength will be weak, and if it exceeds 15%, the strength will be weak. Preferably it is 1% to 7%.

The plasticizer is a compound having a high boiling point and water solubility, having a hydroxyl group, an amino group or an amide group, for example, glycerin,
Ethylene glycol, triethylene glycol, ethanolamine, ethanolacetamide, urea and the like are effective. The addition amount of these plasticizers is also in the range of 0.5% to 10%.

The purpose of mixing 0.1% to 15% of chlorinated lithium is adhesive strength. However, if the amount is less than 0.1%, no change in strength is observed, and if it exceeds 15%, it is preferable. No result is obtained. The preferred amount is 0.5% to 5%
It is.

Lot oil (castor oil sodium sulfonate, usually in a 47% solution) has the effect of improving coating or lubricity, smoothness and heat efficiency, and is less than 0.05%. No effect such as lubricity is recognized with the addition amount of, and when it exceeds 5%, the adhesive strength is undesirably deteriorated. Preferably it is 0.5% to 3%.

If necessary, an antifoaming agent (containing a polyoxyalkylene glycol derivative as a main component) is mixed with the above-mentioned adhesive solution in a range of 0.01% to 5%. This prevents bubbles that are likely to be generated during the process, makes it possible to perform a coating operation without unevenness on the paper band main body, and eliminates a variation in adhesive strength. If it is less than 0.01%, no defoaming effect can be obtained, and
%, The defoaming effect can be obtained, but there is a possibility that the product will be hindered. Preferably it is 0.3% to 3%.

Tables 1 to 3 show the results of the adhesive strength test based on the above examples. The bonding machine uses an automatic packing machine that bonds plastic bands.

[0018]

[Table 1] As a result, the strength test of the test examples of the critical values (2) and (5) is the limit value (60 kg ± 3) of the effective bonding strength of the packing,
In (3) and (4), the strength was increased, and the strength was high enough to withstand packing. The breaking strength of the base material (paper band body) itself is 80
kg (12 m width) or more. (2) In each of the test examples within the range of the mixed liquid component amount in the test example of (5), the packing adhesive strength was not less than 70 kg (70 kg or more).

[0019]

[Table 2] As a result, sufficient adhesive strength was not obtained with (1), and the strength test of the test examples of the critical values (2) and (5) was the limit value (60 kg ± 3) of the effective adhesive strength for packaging, and (3) ( In 4), the strength was further increased, and the strength was high enough to withstand packing. Incidentally, the breaking strength of the base material (paper band body) itself is 80 kg or more. (2) In the test examples in the middle range of the mixed liquid component amount of the test examples in (5), all of the test pieces are equal to or more than the packaging effective adhesive strength (71 kg).
Above).

[0020]

[Table 3] As a result, sufficient adhesive strength was not obtained with (1), and the strength test of the test examples of the critical values (2) and (5) was the limit value (60 kg ± 3) of the effective adhesive strength for packaging, and (3) ( In 4), the strength was increased, and the strength was high enough to withstand packing. Incidentally, the breaking strength of the base material (paper band body) itself is 80 kg or more.
(2) In the test examples in the middle range of the mixed liquid component amount in the test example of (5), all of the test examples fall within the range of the packaging effective adhesive strength (60 ± 3
kg or more).

[0021]

[Effects] As a result, a completely saponified product of polyvinyl alcohol (a saponification degree of 90% or more) with 5% to 18% of an adhesive solution alone can achieve the intended adhesive strength or stable adhesive strength. It is difficult to obtain, but 0.5% to 10% of plasticizer, 0.1% to 15% of lithium chloride, 0.05% of lotus oil
By applying a mixed solution containing 5% to the paper band body, a strength equal to or higher than the packaging effective adhesive strength can be stably obtained due to a synergistic effect of these components.

Further, by applying a mixed solution in which an antifoaming agent is mixed in a range of 0.01% to 5% with respect to a 5% to 18% adhesive solution, bubbles which are easily generated during the process can be prevented, and It was confirmed that the coating operation could be performed without unevenness of the mixed solution on the band main body, and that the adhesive strength became more uniform.

In addition, since the paper bands have low hygroscopicity and do not block each other, the quality of the paper bands can be improved, and the paper bands can be stored with stable strength.

Since the surface of the paper band is coated, a water-resistant effect is obtained, and the "stiffness" of the paper band itself becomes strong.
Insertion into the rail when packing by an automatic packing machine is smooth, and smooth work can be performed.

The most significant feature is that the used paper band can be recycled and is an effective packing material in consideration of environmental problems.

Claims (2)

[Claims] 1. A completely saponified product of polyvinyl alcohol (a saponification degree of 90% or more) on the surface of a paper band main body.
% To 18% adhesive solution, plasticizer 0.5% to 10%
%, 0.1% to 15% chloride chloride, 0.0
A packing paper band coated with a mixed solution of 5% to 5% and dried. 2. A completely saponified product of polyvinyl alcohol (a saponification degree of 90% or more) on the surface of the paper band main body.
% To 18% adhesive solution, plasticizer 0.5% to 10%
%, 0.1% to 15% chloride chloride, 0.0
A packing paper band coated with a mixed solution of 5% to 5% and 0.01% to 5% of antifoaming agent and dried.