JP3111029U - Plastic foam sheet - Google Patents

Abstract

【Task】
To provide a plastic foam sheet that can be used as an accessory or toy. To provide a plastic foam sheet that has a function as a cushioning material for product packaging and that takes into consideration the product image.
[Solution]
The upper plastic sheet 1 having a plurality of convex portions 11, the middle plastic sheet 2 containing the fragrance component 21, and the flat lower plastic sheet 3, and gas is sealed inside the convex portions 11. A plastic foam sheet A is provided. Further, in addition to the above, the plastic cellular sheet A according to the present invention has a configuration in which the upper plastic sheet 1 is made transparent or translucent and a predetermined pattern is printed on the surface (upper surface 22 or lower surface 23) of the intermediate plastic sheet 2 It may be. The plastic foam sheet A can be used as an accessory or a toy. Moreover, when using as a buffer material in the case of product packaging, the image of the product can be improved.
[Selection] Figure 1

Description

  The present invention relates to a plastic cellular sheet containing an aromatic component.

  Conventionally, a plastic foam sheet or an air cap sheet (hereinafter, referred to as “plastic foam sheet” in the present invention) has been widely used as a cushioning material when packaging products.

  The plastic foam sheet is a sheet in which an upper plastic sheet having a plurality of convex portions and a flat lower plastic sheet are melted and pressure-bonded, and gas is enclosed inside the convex portions, and the portion enclosing the gas is Has cushioning properties. Therefore, for example, when a product is packaged with a plastic foam sheet, the product can be protected from an impact from the outside due to cushioning properties, and thus is widely used as a cushioning material.

  In addition, since the plastic foam sheet has a good feel of the convex part and a feeling of rupturing the convex part, it is popular with many people as an accessory or toy even after opening the packaged product.

Note that the following documents are given as prior documents related to the present invention. Patent Document 1 discloses a plastic foam sheet in which an aroma component is enclosed, Patent Document 2 discloses a plastic foam sheet in which a freshness-keeping / deodorizing film is kneaded into plastic, and Patent Document 3 discloses a plastic foam sheet. An example of the manufacturing method of the adhesive sheet is described respectively.
Japanese Unexamined Patent Publication No. 7-178848 JP 2001-219969 A JP 2002-361725 A

  Since the conventional plastic foam sheet has been focused on the function as a cushioning material, improvement for use as a small article or a toy has been insufficient.

  In addition, with the diversification of product forms and consumer preferences, there is an increasing demand not only for the products themselves, but also for the materials used for product packaging (such as plastic foam sheets) that take into consideration the product image. is there.

  Therefore, the present invention provides a plastic foam sheet that can be used as an accessory or a toy, and provides a plastic foam sheet in consideration of the product image while having a function as a cushioning material in product packaging, Is the main purpose.

  The present invention is a plastic cellular sheet having an upper plastic sheet having a plurality of convex portions and a flat lower plastic sheet, in which gas is sealed inside the convex portions, and a predetermined portion in the sheet Provided is a plastic foam sheet containing a fragrance component.

  Specifically, for example, the aroma component may be kneaded into the upper plastic sheet and / or the lower plastic sheet, or an intermediate plastic sheet is provided between the upper plastic sheet and the lower plastic sheet, It may be configured to knead.

  Examples of means for incorporating a high-concentration fragrance component into the sheet include (1) kneading calcium silicate perfumed with the fragrance component, and (2) kneading microcapsules enclosing the fragrance component. is there.

When the aromatic component is encapsulated in the bubbles of the plastic cellular sheet, the aromatic component is likely to diffuse in the production stage, and therefore it is difficult to encapsulate the aromatic component in the plastic cellular sheet at a high concentration. On the other hand, by applying the above-described configuration, the aromatic component can be enclosed in the plastic cellular sheet at a high concentration, and the aromatic component can be held in the plastic cellular sheet for a long time.
In addition, when encapsulating fragrance components in microcapsules, the microcapsules can be forcibly ruptured by applying a strong pressure to the plastic foam sheet. At the same time, there is an advantage that the aromatic component in the microcapsule can be diffused to a high concentration.

  Further, the plastic cellular sheet according to the present invention may be configured such that a microcapsule in which an aroma component is encapsulated is contained in an ink and the ink is applied to the upper surface of the lower plastic sheet. Also in this case, the same effect as described above can be obtained.

  In addition to being able to enjoy the feeling of touching the convex part and the feeling of rupturing the convex part, the plastic foam sheet according to the present invention can also enjoy a scent when the convex part is ruptured. You can enjoy it as a toy.

  For example, also when using a plastic foam sheet as a cushioning material at the time of product packaging, the image of the product itself can be improved by using the kind of fragrance in consideration of the product image of the product.

  In addition to the above, the plastic cellular sheet according to the present invention includes (1) an upper plastic sheet that is transparent or translucent (including the case where the sheet is colored, the same applies hereinafter), Print a predetermined pattern on the lower surface. (2) Form the upper plastic sheet (and middle-layer plastic sheet) transparently or translucently (including the case where the sheet is colored), and place the predetermined pattern on the upper surface of the lower plastic sheet. (3) A predetermined pattern may be printed on the lower surface of the lower plastic sheet (the back surface of the plastic foam sheet).

  Thereby, the utility value as an accessory or a toy can be raised like the above. Moreover, also when using a plastic foam sheet as a shock absorbing material at the time of product packaging, the image of the product itself can be improved similarly to the above by adopting the design in consideration of the product image.

  That is, for example, when packaging souvenirs and special products with plastic foam sheets, the fragrance component is made into the scent of flowers reminiscent of the land, and the middle layer plastic sheet or lower layer plastic sheet has the flower or the land By printing illustrations and photos related to scenic spots, the image of the product can be improved.

  In addition, by placing the printed design between the upper plastic sheet and the middle plastic sheet, or between the upper plastic sheet and the lower plastic sheet, the part with the design is protected by both sheets, and the design can be held for a long time. There is an advantage.

  The plastic foam sheet according to the present invention can be used as an accessory or a toy. Moreover, when using as a buffer material in the case of product packaging, the image of the product can be improved.

  A preferred embodiment for carrying out the present invention will be described below.

  FIG. 1 is a schematic cross-sectional view showing an example of the configuration of a plastic cellular sheet according to the present invention.

  The plastic foam sheet A in FIG. 1 is composed of three layers: an upper plastic sheet 1 having a plurality of convex portions, an intermediate plastic sheet 2 in which an aromatic component is kneaded, and a flat lower plastic sheet 3. Gas (air) is sealed inside the convex portion 11 of the upper plastic sheet 1 to form bubbles.

  The plastic resin used for the conventional plastic foam sheet | seat can be applied to each plastic sheet 1,2,3. That is, for example, polyolefins (PP (polypropylene), LDPE (low density polyethylene), LLDPE (linear low density polyethylene) ethylene-α-olefin copolymer, HDPE (high density polyethylene), EVA (ethylene / vinyl acetate). Copolymer)), polyamides, polyesters, biodegradable polymers (aliphatic polyesters such as polylactic acid and polycaprolactone), and the like can be applied.

  As the fragrance component 21 kneaded into the middle-layer plastic sheet 2, a known fragrance component can be used. For example, the fragrance component 21 having a floral scent such as lily of the valley, lilac, and lavender may be applied.

  The fragrance component 21 can be kneaded in a high concentration by adding the fragrance component 21 to a predetermined carrier such as calcium silicate or encapsulating it in a microcapsule, and then kneading the fragrance component 21 at a high concentration. Moreover, the loss of an aromatic component can be reduced.

In FIG. 1, the fragrance component 21 is kneaded into the intermediate plastic sheet 2. However, in the present invention, whether or not the intermediate plastic sheet 2 is configured is arbitrary, and the plastic according to the present invention. The cellular sheet A is not limited to the configuration shown in FIG.
That is, for example, a case where an aromatic component is kneaded in the upper plastic sheet 1 and / or the lower plastic sheet 3 is also included in the present invention.
In addition, for example, the present invention includes a configuration in which a microcapsule in which an aromatic component is encapsulated is contained in an ink and the ink is applied to the surface (reference numeral 31) of the lower plastic sheet 3.
In these cases as well, the aromatic component can be kneaded at a high concentration and the loss of the aromatic component can be reduced as described above.

  A predetermined pattern may be printed on the upper surface 22 of the intermediate plastic sheet 2. In that case, it is necessary to make the upper plastic sheet 1 transparent or translucent. However, a color may be added as long as it is transparent or translucent. The middle plastic sheet 2 and the lower plastic sheet 3 do not need to be particularly transparent or translucent, and the color and transparency are arbitrary.

  Further, a predetermined pattern may be printed on the lower surface 23 of the intermediate plastic sheet 2 or the upper surface 31 of the lower plastic sheet 3. In that case, it is necessary to make the upper plastic sheet 1 and the middle plastic sheet 2 transparent or translucent. In addition, when printing a predetermined pattern on the lower surface of the lower plastic sheet (the back surface of the plastic foam sheet, reference numeral 32), any sheet need not be transparent or translucent, and an arbitrary one can be used. it can.

  In addition, when the ink contains microcapsules in which an aromatic component is encapsulated and the ink is applied to the upper surface of the lower plastic sheet 3, the upper plastic sheet 1 is made transparent or translucent, and the upper surface 31 of the lower plastic sheet 3 is used. A predetermined pattern may be printed. In that case, the microcapsule in which the aromatic component is encapsulated can be contained in the ink for printing the design.

  FIG. 2 is a schematic top view of the plastic cellular sheet according to the present invention.

  When the plastic foam sheet A according to the present invention is viewed from above, a plurality of convex portions 11 are provided on the sheet A. In addition, when a predetermined pattern is applied to the surface (upper surface 22 or lower surface 23) of the middle-layer plastic sheet 2 or the upper surface 31 of the lower-layer plastic sheet 3 in FIG. Can be seen from. In addition, the arrangement and the number of symbols and symbols are arbitrary and are not particularly limited.

  FIG. 3 is a schematic cross-sectional view showing a case where the convex portion of the plastic cellular sheet according to the present invention is ruptured.

  When the fragrance component 21 is kneaded into the middle-layer plastic sheet 2 of the plastic foam sheet A, a part of the fragrance component 21 is released to the internal measurement 12 of the convex portion 11 of the upper-layer plastic sheet 1 (reference numeral 21 '). Therefore, the fragrance component 21 ′ is sealed at a high concentration inside the convex portion 11 of the upper plastic sheet 1.

  Therefore, as shown in FIG. 3, when the convex portion 11 of the upper plastic sheet 1 is ruptured, the fragrance component 21 ′ is released to the outside of the sheet A.

In addition, when encapsulating the fragrance component 21 in the microcapsule, the microcapsule can be forcibly ruptured by applying a strong pressure to the sheet A. At the same time, the fragrance component in the microcapsule can be diffused to a high concentration.
The same applies to the case where the microcapsules in which the aromatic component is encapsulated are contained in the ink and the ink is applied to the upper surface of the lower plastic sheet.

  FIG. 4 is a schematic view showing an example of a plastic foam sheet manufacturing apparatus according to the present invention.

  In the manufacturing apparatus B shown in FIG. 4, a film 1 ′ (film forming an upper plastic sheet) extruded from a T die B1 and a film 2 ′ (film forming a middle plastic sheet) extruded from a T die B2 The film 3 ′ extruded from the T-die B3 (the film forming the lower plastic sheet) is pressure-bonded with the pressure-bonding roll B4 to produce the plastic cellular sheet A.

  The film 1 ′ that forms the upper plastic sheet is extruded from the T die B <b> 1, and then the convex portion 11 is formed by the molding roll B <b> 5 and is crimped by the crimping roll B <b> 4. The forming roll B5 rotates while vacuum-sucking the film 1 'to sequentially form the convex portions 11 of the upper plastic sheet.

  The film 2 'forming the middle-layer plastic sheet is extruded from the T die B2, and then sent to the pressure roll B4 and pressure bonded. The T die B2 is loaded with a plastic material in which an aromatic component is kneaded. The aromatic component may be added to a predetermined carrier such as calcium silicate or encapsulated in a microcapsule and then kneaded into a plastic material. Thereby, an aromatic component can be kneaded into a plastic material in a stable and high concentration.

  In addition, a predetermined design may be printed on the film 2 'on the film 2' using the printing means B6 (arrow 4). The printing unit B6 can use a known method such as an inkjet. FIG. 4 shows a configuration example when printing is performed on the upper surface of the film 2 ′, but the configuration position of the printing means B6 is changed so that a predetermined pattern is printed on the lower surface of the film 2 ′ or the upper surface of the film 3 ′. May be.

  Reference numerals B7 and B8 are guide rolls for feeding the films 2 'and 3' to the press roll B4, and are optional. Reference sign B9 is a peeling roll for peeling the pressure-bonded plastic cellular sheet A from the forming roll B5.

  In addition, the manufacturing apparatus of the plastic foam sheet A which concerns on this invention is not limited to the above apparatus structures. For example, after a predetermined pattern is printed on the film 2 ′ or the film 3 ′, the apparatus configuration may be such that first the film 2 ′ and the film 3 ′ are pressure-bonded and then the film 1 ′ is pressure-bonded.

  Subsequently, as specific examples of the method of incorporating the fragrance component into the sheet, two methods of (A) a method of kneading the fragrance component by masterbatch formation and (B) a method of mixing and applying the ink will be described below. In addition, this invention is not limited narrowly only when these methods are used.

<(A) About the method of kneading an aromatic component by making a master batch>
In the case where the microcapsules encapsulating the fragrance component are kneaded into the plastic sheet, for example, master batching, that is, a method including at least the following steps (1) to (3) can be applied.
(1) A step of encapsulating an aromatic component in a microcapsule,
(2) The step of cutting the formed sheet (master batch) after melting and kneading and cooling the microcapsule and the plastic sheet material (plastic resin material),
(3) A step of forming a middle-layer plastic sheet by melting and kneading the plastic sheet material (plastic resin material) and the cut sheet after melt-kneading.

The outline will be described below.
First, an aromatic component is encapsulated in a microcapsule (known method). Thereby, since the fragrance component is protected by the microcapsule, the heat resistance of the fragrance component is improved.
Next, the microcapsules enclosing the fragrance component and the plastic sheet material (plastic resin material) are melt-kneaded and cooled, and then the formed sheet is cut (production of a masterbatch). Then, the cut sheet (masterbatch) and the plastic sheet material (plastic resin material) are melt-kneaded and cooled to form a plastic sheet. Thereby, an aroma component can be kneaded into a plastic sheet substantially uniformly.
The formed plastic sheet can be applied to upper, middle and lower plastic sheets depending on the purpose and configuration.

<(B) Method of mixing with ink and applying>
In the case where the ink contains microcapsules in which an aromatic component is encapsulated and the ink is applied to the surface of the lower plastic sheet, for example, a method including at least the following steps (1) to (3) can be applied.
(1) A step of encapsulating an aromatic component in a microcapsule,
(2) a step of mixing the microcapsules with a predetermined ink;
(3) A step of applying the ink to the upper surface of the lower plastic sheet.

The outline will be described below.
First, similarly to the above, an aroma component is encapsulated in a microcapsule (known method).
Next, the microcapsules enclosing the fragrance component and the ink are mixed and applied to the upper surface of the lower plastic sheet. Thereby, an aroma component can be contained in a plastic foam sheet substantially uniformly.

  The ink can be applied as long as it can be printed on a plastic sheet, and both ink for gravure printing and flexographic printing can be applied. In addition, when printing a predetermined pattern on the lower plastic sheet, the ink used for the printing may contain the microcapsules.

  In Example 1, a prototype of a plastic cellular sheet according to the present invention was produced by kneading an aroma component into a middle-layer plastic sheet using a master batch.

First, as a microcapsule enclosing an aromatic component, a Chemtech capsule colon (registered trademark, manufactured by Chemtech Co., Ltd., the same below) was prepared. Chemtech Capsule Colon is a scented capsule, the capsule wall material is melamine resin, and the capsules have an average particle size of 2 to 5 μm. In this experiment, capsules containing cypress aroma components were used.
In addition, LDPE (low density polyethylene, melt flow rate 5.0 g / 10 min, density 0.922 g / cm ³ ) was used as the study resin.
Subsequently, a chemitech capsule colon was masterbatched into LDPE. Blending composition is LDPE 90%, Chemitec Capsule Colon 10%, melt kneading with a small kneader (kneading machine, 400cc) (resin temperature at kneading 140 ° C., kneading time 5 minutes) and cooling to form a sheet did. And the sheet | seat was cut | judged and the pellet-shaped masterbatch was produced.
Subsequently, a prototype of a plastic cellular sheet was produced using the produced master batch. The LDPE resin material was put into each of the three T dies of the T die molding machine, and the prepared master batch was further added to the T die for the intermediate plastic sheet. Then, using a T-die molding machine, molding was performed at a T-die temperature of 160 ° C., a cylinder temperature of 160 ° C., and a molding speed of 10 m / min to produce a prototype of a plastic foam sheet.
In addition, the compound composition in T die for middle-layer plastic sheets produced the following three prototypes.
(1) 97% LDPE, 3% master batch
(2) LDPE 95%, master batch 5%
(3) LDPE 90%, master batch 10%

  As a result, all the molded articles (prototypes of plastic foam sheets) had good appearance and good buffering properties. Moreover, as a result of observing a cross section using SEM (electron microscope), the microcapsules were not destroyed but were mixed in the middle-layer plastic sheet.

  In Example 2, a microcapsule in which an aroma component was encapsulated was contained in an ink, and the ink was applied to the upper surface of the lower plastic sheet, thereby producing a prototype of a plastic cellular sheet according to the present invention.

In this experiment, a perfume ink “Aromatec” (trade name, manufactured by Kuboi Ink Co., Ltd.) was prepared as an ink. This ink is a water-based ink for flexographic printing and contains microcapsules enclosing a fragrance.
Moreover, the LDPE film was prepared as a lower layer plastic sheet. The printed surface of the LDPE film was subjected to corona treatment.
Next, the fragrance ink was applied to the printing surface of the LDPE film and then dried with hot air.
Next, a prototype of a plastic foam sheet was prepared. After the upper plastic sheet was extruded from the T-die, bubbles were formed in the melt-formed state. And after melting LDPE (lower layer plastic sheet) apply | coated with the fragrance | flavor ink with a heating roll, it bonded together with the upper layer plastic sheet, and produced the prototype of the plastic foam sheet.

  As a result, the produced molded product (prototype of the plastic foam sheet) had a good appearance and good buffering properties. In addition, there was a fragrance when the bubbles were ruptured, and when the plastic foam sheet was rubbed after the bubbles were ruptured, a stronger aroma was obtained. The above results suggest that by producing a plastic foam sheet by the above procedure, the fragrance component can be retained even under heating conditions during plastic foam sheet molding.

  The plastic foam sheet according to the present invention can be used as an accessory or a toy. Moreover, the plastic foam sheet which concerns on this invention can be utilized as a shock absorbing material used in the case of product packaging.

  The plastic foam sheet according to the present invention is useful not only for packaging general products but also for packaging souvenirs and special products. For example, when packaging souvenirs and special products of Hokkaido, fragrant ingredients such as lily of the valley, lilac, and lavender reminiscent of Hokkaido are enclosed in a plastic foam sheet, and their flowers or scenery of Hokkaido are designed. By printing on a plastic foam sheet, the product image of souvenirs and special products can be improved.

The cross-sectional schematic diagram of the plastic foam sheet which concerns on this invention. The upper surface schematic diagram of the plastic foam sheet which concerns on this invention. The cross-sectional schematic diagram which showed the case where the convex part of the plastic foam sheet which concerns on this invention was ruptured. The schematic diagram which shows an example of the apparatus structure of the plastic foam sheet which concerns on this invention.

Explanation of symbols

1 Upper layer plastic sheet 2 Middle layer plastic sheet 21 Fragrance component 23 Pattern 3 Lower layer plastic sheet A Plastic cellular sheet

Claims (7)

A plastic cellular sheet having an upper plastic sheet having a plurality of convex portions and a flat lower plastic sheet, wherein gas is sealed inside the convex portions,
A plastic cellular sheet in which an aromatic component is kneaded into the upper plastic sheet and / or the lower plastic sheet. An upper plastic sheet having a plurality of convex portions, an intermediate plastic sheet in which an aromatic component is kneaded, and a flat lower plastic sheet,
A plastic cellular sheet in which gas is sealed inside the convex portion.   3. The plastic cellular sheet according to claim 1, wherein calcium silicate perfumed with the aromatic component is kneaded.   The plastic foam sheet according to claim 1 or 2, wherein a microcapsule enclosing the fragrance component is kneaded. A plastic cellular sheet having an upper plastic sheet having a plurality of convex portions and a flat lower plastic sheet, wherein gas is sealed inside the convex portions,
A plastic foam sheet in which a microcapsule in which an aromatic component is encapsulated is contained in an ink and the ink is applied to the upper surface of the lower plastic sheet.
  The plastic foam sheet according to any one of claims 1 to 5, wherein a predetermined pattern is printed on an upper surface or a lower surface of the middle-layer plastic sheet, or an upper surface or a lower surface of the lower plastic sheet. . The fragrance component is a scent of a predetermined flower, and the design of the flower is printed on an upper surface or a lower surface of the intermediate plastic sheet or an upper surface or a lower surface of the lower plastic sheet. The plastic cellular sheet according to claim 5.