KR101915608B1 - Packing material having a self-sealing and impact absorbing function - Google Patents

Abstract

The present invention relates to a self-adhesive sealing and a packaging material having an impact-absorbing function capable of protecting a product from impact by close adhesion through a bone structure peculiar to a corrugated cardboard while being capable of being subjected to adhesive sealing without using an adhesive, It is possible to safely cushion the product by external impact or shake due to its own structure without constituting the shock absorber, and it is possible to prevent the adhesive property of the sealing portion so that the sealing portion can be pressed by simply pressing the rim portion at a constant pressure only at room temperature It is possible to remarkably improve usability. The present invention for achieving the above object is achieved by an adhesive composition comprising a polyisoprene which is an amphiphilic and excellent cohesive force and adhesive force as an adhesive, and an adhesive in which an aqueous adhesive of a natural latex component made of a mixture of ethylene vinyl acetate (EVA) The adhesive paper 20 in the form of a corrugated cardboard in which the cardboard corrugation 22 is curved and uneven in the form of a wrinkle coated with the surface 24 is formed and the outer surface of the adhesive paper 20, The water-based adhesive, which is coated on the adhesive surface 24 of the adhesive paper 20, is an adhesive, and the cohesive force and the adhesive force are optimum Polyisoprene and EVA (Ethylene Vinyl Acetate) are synthesized at a mixing ratio of 80:

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a packaging material having a self-

The present invention relates to a self-adhesive sealing and a packaging material having an impact-absorbing function capable of protecting a product from impact by close adhesion through a bone structure peculiar to a corrugated cardboard while being capable of being subjected to adhesive sealing without using an adhesive, It is possible to safely cushion the product by external impact or shake due to its own structure without constituting the shock absorber, and it is possible to prevent the adhesive property of the sealing portion so that the sealing portion can be pressed by simply pressing the rim portion at a constant pressure only at room temperature Self-adhesive sealing and a shock-absorbing packaging material that dramatically improves usability.

In general, a mail parcel box, a cosmetic box, and the like in which a fragile article is packed is provided with a buffer material such as a styrofoam or a poly bag for protecting the contents of the product from an external impact. However, since the internal cushioning material is provided to protect the shock buffer and the product damage and is used together with the actual external packaging material, waste of time and material is unnecessarily necessary, as well as waste of tremendous resources discarded after using the packaging material or the packaging box The inconvenience of anger and natural pollution is always a problem.

Meanwhile, as a method for improving inconveniences incurred in a conventional product packaging material or a packaging box, there has been proposed a method of improving the discomfort of the conventional packaging material or packaging box, as disclosed in Korean Patent Application No. 10-2011-0056026 or Utility Model Publication No. 20-1999-0023406, And packaging materials utilizing corrugated cardboard of shock absorbing structure in various methods through the registration and utility model No. 20-0383799.

As is well known, corrugated packaging is used in a whole package form such as a unit package, an inner package, an outer package, and a cargo transportation itself. As a packaging material, it is inexpensive and has good uniformity, high strength per unit weight, And excellent in adaptability to relatively high / low temperatures. Also, the corrugated cardboard has an advantage of being hygienic due to no odor and toxicity, good in automatic packaging suitability, excellent in shape retention, excellent in environmental adaptability, and excellent in recyclability of waste, and occupies an overwhelming position as a packaging material .

The use of corrugated cardboard packaging material has a high proportion of water-resistant parts, mainly using double-sided corrugated cardboard boxes. For example, a packing box (mainly used for agricultural product packaging) currently being produced is manufactured from liner raw paper and corrugated paper having a basis weight of 180 to 220 g / m 2 and 150 to 180 g / m 2, Paraffin wax is coated at a coating weight of about 40 g / m 2.

However, the conventional corrugated cardboard packaging material has a disadvantage in that the product must be put in a plastic bag to be packaged again after being packed in order to prevent deterioration of the product due to humidity and external climate. In addition, products packaged in vinyl have a disadvantage in that it is not easy to prevent the deterioration due to sexual intercourse even in the packaging due to the change of the climate, and the function of the product is deteriorated when stored for a long period of time.

In particular, packaging materials or packaging boxes utilizing cardboard (including monofilars) made of vinyl or synthetic resin as well as most paper materials have been used as separate shock absorbers to prevent the formation of space between the packaging material and the product Air layer), or a cushioning material of soft material was forced to be inserted. In some cases, the adhesive was applied to the corrugated cardboard by thermal bonding using the characteristics of the corrugated paper which was formed into a corrugated wavy flute Or a separate double-sided tape or the like, has been introduced. However, in reality, it is not only practically used as a corrugated cardboard packaging material but also has limitations in accurate and reliable adhesive sealing treatment.

The present invention has been researched and developed so as to reliably solve various inconveniences that have not been solved by conventional packaging materials, so that the product can be safely cushioned by an external impact or shaking due to its own structural characteristics without constituting a separate shock absorber A self-adhesive sealing and a shock absorbing packaging material in which sealing performance of a sealing part is remarkably improved so that a rim can be sealed by simply pressing a rim at a constant pressure only at room temperature in a sealing process while being protected It has its purpose.

In order to achieve the above object, the self-adhesive sealing and the packing material having an impact-absorbing function of the present invention are made of Polyisoprene and Ethylene Vinyl Acetate (EVA), which are excellent in cohesion and adhesion as an adhesive, (20) formed by corrugated cardboard corrugations (22) formed in the form of a wrinkle coated with an adhesive surface (24) where an aqueous adhesive of a natural latex component made by mixing (20) is bonded to a non-exposed bonding surface (26) on the opposite side of the bonding surface (24), and a plain plain paper (10) is bonded to form an integral structure.

The water-based adhesive applied on the adhesive surface 24 of the adhesive paper 20 is an adhesive having a polyisoprene and an ethylene vinyl acetate (EVA) ratio of 80:20 so that the cohesive force and adhesive force can be maintained in an optimum state. EVA (Ethylene Vinyl Acetate) is composed of 70 to 80% by weight of vinyl acetate (Vinyl Acetate Monomer), 10 to 20% by weight of ethylene monomer (Ethylene Monomer), 10 to 20% by weight of polyvinyl alcohol (PVA) (20 wt%) are synthesized by emulsion-type resin synthesized by mixing.

The self-adhesive sealing and the shock-absorbing packaging material of the present invention formed by the above-described constitutional principle can be adhesively sealed without using any adhesive, and can securely protect the product from impact can do.

In particular, the packaging material according to the present invention is environmentally friendly as an aqueous natural latex component, and the packaging material itself is made of paper, so that the recycling is easy and the environmental pollution can be drastically reduced. In addition, due to the nature of the corrugated cardboard of the packaging material, since the corrugated cardboard corrugations on both sides are adhered to each other, they can be safely sealed and stored, and the cardboard corrugations of the packaging material are structurally buffered. Can be safely protected.

And, due to the nature of the environmentally friendly adhesive composition applied in the present invention, the sealing can be performed with only a slight pressure without any external heat, so that the packaging operation can be performed more easily and quickly. In addition, it is expected that it will be able to provide various effects such as buffering and moisture-proof packaging, which can safely protect the product from shock and moisture.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a partially separated state showing the structure of a self-adhesive sealant and a package having an impact-absorbing function according to the present invention. FIG.
FIGS. 2 and 3 show a state of use in which a folded article is simply self-adhesively sealed as a packaging material without the use of a separate shock absorbing cushioning material according to the present invention, or a pressure- .
FIGS. 4A and 4B are test reports showing that the components of the packaging material formed by using the adhesive of the self-adhesive sealing and the method of manufacturing a package having an impact-absorbing function according to the present invention are not subjected to environmental hazards.

Hereinafter, the specific construction principle of the self-adhesive sealing and the package having the shock absorption function of the present invention will be described in more detail through the test results of the preferred embodiments and the drawing examples.

First, according to the present invention, a self-adhesive sealing and a packing material having a shock absorbing function capable of safely protecting a product from impact by close contact through a bone structure peculiar to a corrugated cardboard can be subjected to adhesive sealing without using an adhesive, , A water-based adhesive of a natural latex component made of a mixture of polyisoprene and ethylene vinyl acetate (EVA), which has good cohesion and adhesion as an adhesive and has good affinity through the below-described embodiments, The adhesive sheet 20 of the corrugated cardboard structure in which the cardboard corrugations 22 are curved and uneven in the form of a wrinkle coated with the adhesive surface 24 is formed on the adhesive surface 20 of the adhesive sheet 20 The flat non-exposed side 26 is joined to the plain bottom side 10 to form an integral structure.

Particularly, the adhesive ability of the adhesive paper 20, which is a corrugated cardboard structure constituting the packaging material of the present invention, should be maintained as the most scientific and reasonable adhesive force and cohesive force through the following embodiments, , It is possible to perform adhesive sealing without using a separate adhesive, while the adhesive of the coated adhesive surface 24 at the time of the folding adhesion through the corrugated cardboard specific bone structure or by the mutual pressing can be used for at least three months Adhesive properties must be ensured to maintain capability.

That is, in the case of the corrugated cardboard form of the packaging material which is contacted with the article to be pressed and packed through the self-adhesive sealing and the method of manufacturing the packing material having the impact absorbing function according to the present invention, The adhesive used for the exposed adhesive surface 24 can be conveyed more precisely through the following examples. For reference, the adhesive provided on the exposed adhesive surface 24 can be used for the test As the adhesive of the corrugated cardboard packaging material to be achieved by the present invention in the test report, it may be sufficient as an eco-friendly material without a reliable adhesive force and no risk of environmental pollution.

Basically, the adhesive applied to the adhesive surface 24, which is the outer surface to be contacted and squeezed with the article to be packaged as the adhesive sheet 20 of the packaging material according to the present invention, is made of polyisoprene and ethylene vinyl acetate (EVA) Vinyl Acetate) as a water-based adhesive. Polyisoprene, which is used as an adhesive, is a latex type resin made of natural rubber.

EVA (Ethylene Vinyl Acetate) is mixed with 70 to 80 wt% of vinyl acetate, 10 to 20 wt% of ethylene monomer, and 10 to 20 wt% of polyvinyl alcohol (PVA) (Polyisoprene) and the EVA (Ethylene Vinyl Acetate) are ultimately mixed in an 80:20 blend ratio, so that the cohesive force and the adhesive strength It can be found that the physical property is the most optimal state.

First, under the condition of the adhesive test (test) of the present invention for confirming the adhesive force, the amount of application is 10 占 퐉 in the dry state, and the adhesive bonding (room temperature bonding) is basically performed. Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Target 100 Poly Isoprene 100 SBR 1 100 SBR 2 100 Acryl 1 100 Acryl 2 100 Adhesion
(g / inch) 750 1600 150 250 10 30

As shown in Table 1, the Target of Example 1 is a foreign product currently in use,

Isoprene of Example 2 is a synthetic latex having a Tg of -40 to 60 ° C,

SBR (Styrene-Butadiene Rubber) 1 of Example 3 is a synthetic latex having a Tg of 0 to 10 ° C,

SBR 2 of Example 4 is a synthetic latex having a Tg of -10 to 0 캜,

Acryl 1 of Example 5 was aqueous Acryl with Tg of -20 to -10 ° C,

Acryl 2 of Example 6 is aqueous Acryl with Tg of -30 to -20 캜,

Example 7 Example 8 Example 9 Example 10 EVA 1 100 EVA 2 100 EVA 3 100 EVA 4 100 Adhesion
(g / inch) 50 30 30 10

Further, as shown in Table 2, EVA 1 of Example 7 is an emulsion resin having a Tg of -20 to -10,

EVA 2 of Example 8 is an emulsion resin having a Tg of about -5 to 5,

EVA 3 of Example 9 is an emulsion resin having a Tg of about 0 to 10,

EVA 4 of Example 10: Tg: Emulsion resin of about 15 to 25.

As a result of the test, the adhesive strength was evaluated at a low Tg, but it is necessary to select a resin which needs to be self-adhesive in order to exhibit the adhesive force by the pressure at the time of bonding, and accordingly it is necessary to use a latex- .

Although the adhesive force according to Example 2 exhibits sufficiently satisfactory physical properties, there is a possibility that some of the adhesive may peel off from the coated surface, which is the adhesive surface 24 of the adhesive paper 20, during the guide roll or rewind during the work process, , It is confirmed that there is a phenomenon that the rubber is bundled when the high-speed agitation or the adhesive circulation occurs, so that the workability may not be smooth.

As a method for improving the problems of the above embodiments, the aggregation of the adhesive is increased by using the EVA resin, and the aggregation phenomenon is improved by using the Amine series, Urea, and Alkalinity.

As a test for improving the cohesion, the improved results can be confirmed by the following examples as shown in Table 3. At this time, the coating amount is Dry 10 μm under the test condition, and it is the principle of adhesion in the hibernation (room temperature).

Example 11 Example 12 Example 13 Example 14 Example 15 Example 16 Example 17 Target 100 Poly isoprene 100 90 80 70 60 50 EVA 10 20 30 40 50 cohesion Good Cohesive failure Good Good Good Good Good Adhesion
(g / inch) 750 1600 1500 1300 1300 880 750

As a result of the test, it was found that the cohesion of the coated surface (adhesive surface) was good when the EVA content was 10%, and as the EVA content increased, The adhesive strength was decreased.

In other words, the cohesive force can be grasped as the degree of sagging of the adhesive surface (24) when peeling off after the hibernation. In the field test, the line test was applied in the form of 70: 30 due to the comparison of adhesion with the target product. As a result, The results were confirmed.

Therefore, an additional line test was carried out at 80: 20 ratio. As a result, satisfactory results were obtained in terms of physical properties, and a test to improve the bunching phenomenon was carried out. While stirring, the RPM was fixed to 600 at the time of stirring, and the phenomenon after stirring at 6Hr was confirmed. As a result,

Example 18 Example 19 Example 20 Example 21 Poly isoprene 80 80 80 80 EVA 20 20 20 20 Amine 3 Urea 3 Alkalinity 3

As shown in Table 4, in the case of Example 14, after the stirring for 6 hours, the particles and aggregation occurred and the product was deformed. In Examples 15 to 17, it was confirmed that there was no abnormality when proceeding with at least one compounding there was.

The present invention in which an adhesive is formed using such a composition to coat the adhesive paper 20 of the packaging material of the present invention to form the adhesive surface 24 is shown in FIG. 2 and FIG. 3, As shown in FIG. 2, the article 30 is first placed on the adhesive paper 20 in a corrugated cardboard form, folded in half, and then manually pressed on the edge of the article 30 40 are pressed directly or by a separate compression device so that the crimped portion 40 is automatically pressed to form the adhesive paper 20 of the packaging material. So that they can be firmly and tightly coupled.

At this time, as a packaging material having a self-adhesive sealing and shock absorption function to be implemented by the present invention by an adhesive applied on the adhesive surface 24 which is environmentally friendly and excellent in adhesion force and cohesive force applied to the packaging material of the present invention, Can be exercised. The adhesive paper 20 constituting the packaging material of the present invention is bonded to the back sheet 10 opposite to the adhesive surface 24 unlike the adhesive component applied to the externally exposed adhesive surface 24, It is needless to say that the bonding surface 26 which is not a bonding agent according to the present invention can be applied as a conventional starch-type adhesive instead of the packing material adhesive composition according to the present invention.

10: back side 20: adhesive side
22: carton core 24: adhesive side
26: joint surface 30: article
40: Compression (pressure) region

Claims (3)

Polyisoprene and Ethylene Vinyl Acetate (EVA: Ethylene Vinyl Acetate), which are friendly horn and excellent cohesion and adhesive force as an adhesive, 24) is formed in a corrugated cardboard-like adhesive paper 20 in which the cardboard corrugation 22 is curved and uneven in the form of a coated coating, (26) is made of an integral structure by bonding a regular plain paper (10)
The EVA (Ethylene Vinyl Acetate) is synthesized by mixing 70 to 80 wt% of vinyl acetate, 10 to 20 wt% of ethylene monomer, and 10 to 20 wt% of polyvinyl alcohol (PVA) Characterized in that it is synthesized with an emulsion type resin. delete delete

Images