JP2001026752A - Heat insulating coating liquid and heat insulating container comprising feather powder formulated therein - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a heat insulating coating liquid and a heat insulating container comprising a feather powder formulated therein. SOLUTION: This heat insulating coating liquid is formed by formulating 5-50 (weight ratio) of a feather powder in a coating material consisting essentially of a polyurethane resin and a solvent. The heat insulating container is obtained by coating the surface of a base paper with the resultant coating liquid in 10-50 g/m2 coating weight, forming a coated paper and forming the container such as a paper cup with the resultant coated paper so as to locate the coated layer on the outside. Since excellent heat retaining properties (heat insulating properties) can be imparted by utilizing characteristics of the natural feather keratin and the coated layer on the outside becomes an unsmooth surface, the container can be prevented from slipping off from a hand when holding the container. The coating liquid is not limited to the paper as a substrate and the application can be made to, e.g. a plastic, pottery, iron, aluminum or glass.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating coating liquid containing feather powder and a heat insulating container using the coating liquid.

[0002]

2. Description of the Related Art Conventionally, paper containers represented by paper cups are excellent in water resistance but not necessarily excellent in heat insulation. For this reason, when a high-temperature liquid is charged, it is instantaneously hot and difficult to hold, and the hand becomes hot or burns, or the container is heated and it is difficult to drink. Further, there is also a problem that the stored liquid is easily cooled due to poor heat retention. Further, since the conventional paper container is finished in a smooth surface as a whole, it is liable to slip when held in a hand, and a situation such as dropping or spilling the contents and soiling the hand, clothes, and the like occurs.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional drawbacks, and a coating liquid having excellent heat insulating properties, heat retaining properties and anti-slip properties by incorporating feather powder. It is intended to provide a container.

[0004]

As a technical means for achieving this object, the present invention has a heat retaining property and a slip resistant property obtained by mixing a required amount of feather powder with a paint mainly composed of a resin and a solvent. The summary is a heat insulating coating liquid. The heat insulating coating solution is characterized in that feather powder is blended in an amount of 5 to 50% with a paint mainly composed of a polyurethane resin and a solvent.
Also, a coating liquid is prepared by mixing a required amount of feather powder with a coating mainly composed of a resin and a solvent, and the coating liquid is applied to the surface of a base material, and has a heat retaining property and a non-slip property obtained by drying. The insulated container is the gist. In this heat-insulating container, 5% to 50% of feather powder is added to a paint mainly composed of a polyurethane resin and a solvent.
It is characterized in that a blended coating liquid is formed, the coating liquid is coated on the surface of the substrate, and dried. Further, a coating liquid is prepared by mixing a required amount of feather powder with a coating mainly composed of a resin and a solvent, and the coating liquid is applied to the surface of a base paper and dried. The gist of the present invention is a paper heat-insulating container in which a container is formed such that a coating surface is on the outside. In this heat insulating container made of paper, a coating liquid is prepared by mixing 5 to 50% of feather powder with a coating mainly composed of a polyurethane resin and a solvent, and the coating liquid is applied to the surface of the base paper and dried. The container is formed by using coated paper having the coated surface facing outward.

[0005]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 shows an example in which the present invention is applied to a paper cup 1. As a material, a coating layer 3 is formed on the surface of a base paper 2 mainly composed of cellulose pulp as shown in FIG. Coated paper 4 is used and its coated layer 3
The paper cup 1 is formed in such a manner that is the outer surface.

The coating layer 3 is formed by forming a coating liquid in which a required amount of feather powder is mixed with a coating mainly composed of a resin and a solvent, and this coating liquid is coated on the surface of the base paper 2. Things. In this case, the coating liquid is formed by mixing 5 to 50% by weight of feather powder 5 with a coating mainly composed of a polyurethane resin and a solvent, and 0.1 to 60 g of the coating liquid is applied to the surface of the base paper 2.
/ M ² and dried.

When the weight ratio of the feather powder 5 is less than 5%, the heat insulation performance, heat retention performance and anti-slip performance are weak, and
If it exceeds 0%, it is difficult to perform uniform coating. The coating amount is preferably about 10 to 50 g / m < ² > because the heat insulating effect is weak when the coating amount is small and the cost increases when the coating amount is large. Further, the polyurethane resin and the solvent were selected because the heat resistance of the coating layer 3 after curing and the dispersibility of the feather powder 5 were good.

The feather powder 5 is a natural material excellent in water repellency and heat retention. When the coating liquid is applied to the base paper 2, the formed paper cup 1 is provided with a water resistance function and a heat insulation function, Further, an anti-slip function can be provided. The coating liquid can be easily applied using a known coater equipment such as a gravure coater, and drying after the application can be performed using equipment such as a general dryer.

In this case, the feather powder 5 is a fine powder obtained by immersing feathers in an alcohol-based solvent, milling by rotary milling and ball milling, and having a particle size of about 20 μm. It is possible to carry out within the scope. The coating layer 3 which is the outer surface of the paper cup 1 has a rough texture due to the fine feather powder 5,
Therefore, hand slippage can be prevented when holding the paper cup 1.

Further, the feather powder 5 has improved oil-absorbing properties and thus has improved printing characteristics, can be naturally biodegraded by microorganisms, and has good disintegration properties, so that the paper cup 1 can be recycled as waste paper after use. can do.

[0011] Feathers are usually composed of keratin at about 70%, and this keratin is the fibrous protein having the highest strength among many proteins, and is used for hair, wool, animal hair, bird feathers, and skin. It forms the epidermis and the like. The feather powder 5
Has a particularly hydrophobic amino acid composition among the hard protein keratins, which are the main components, and has a property of easily capturing oil due to the internal hollow structure characteristic of feather fibers.

Next, paper cups according to the present invention were prepared (Examples 1 to 3), and a heat retention test was performed for comparison with Comparative Example 1. (Example 1) A coating liquid containing 30% of feather powder was applied to a surface of 240 g / m ² of white paperboard at 10 g / m ² , and dried using coated paper so that the coating layer was on the outside. To form a paper cup. (Example 2) A coating liquid containing 30% of feather powder was applied to the surface of 240 g / m ² of white paperboard at 30 g / m ² , and dried using coated paper so that the coating layer was on the outside. To form a paper cup. (Example 3) A coating liquid containing 30% of feather powder was applied to a surface of 240 g / m ² of white paperboard at 50 g / m ² , and dried using coated paper so that the coating layer was on the outside. To form a paper cup. (Comparative Example 1) For comparison with the example, 240 g of white paperboard was used.
/ M ² was used to form a paper cup.

In the test method, hot water at 82 ° C. was put into each paper cup, and the temperature change on the surface of the paper cup was measured with the passage of time using a non-contact surface thermometer. The measurement result was as shown in FIG. According to the measurement results, it was found that all of Examples 1 to 3 had a smaller decrease in the temperature of the paper cup surface than Comparative Example 1, that is, were superior in heat retention (heat insulation). Even if a high-temperature liquid is added, the outside does not become instantly hot, so that even if a paper cup is held, the hand does not become hot or burns. Further, the temperature of the liquid can be kept as low as possible to make it difficult to cool.

In the above embodiment, an example of a paper cup has been described, but the substrate is not particularly limited. For example, it can be widely applied to base materials such as plastic, pottery, iron, aluminum, and glass. Since it has excellent heat insulating properties, it can be used as a container for not only hot foods but also cold foods such as frozen foods.

[0015]

As described above, according to the present invention,
It is possible to form a heat-insulating coating solution and a heat-insulating container containing a required amount of feather powder. In particular, use a coated paper obtained by applying this coating solution to the surface of a base paper and drying the coated paper. By forming the container such that the working layer is on the outside, the characteristics of natural feather keratin can be utilized to provide a paper container having excellent heat retention (heat insulation) and anti-slip properties. Accordingly, when a high-temperature liquid is held in a container, the hand is not instantaneously heated or burned, and the container is not heated and becomes difficult to drink. In addition, since the fine feather powder is on the outside of the container, it can be prevented from slipping, and it is possible to prevent a situation in which the container is dropped or the contents are spilled and hands and clothes are stained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment in which the present invention is applied to a paper cup.

FIG. 2 is a schematic cross-sectional view showing the configuration.

FIG. 3 is a graph showing the results of a heat retention test of a paper cup.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Paper cup 2 ... Base paper 3 ... Coating layer 4 ... Coated paper 5 ... Feather powder

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C09D 175/04 C09D 175/04 D21H 27/00 D21H 27/00 Z (72) Inventor Kazushige Yoshioka Iyo, Ehime 1-27 Miyagawa, Mishima-shi F-term in Kami Shoji Co., Ltd. (Reference) 3E060 AA18 AB01 BC08 DA24 DA30 EA03 EA13 3E067 AA03 BA07A BB01A BB08A BB09A BB11A BB14A BB22A BB26A CA18 EE32 EE35 4J001 NABA192 4L055 AG53 AG85 AG96 AH02 AH37 AJ04 BE08 EA32 FA11 GA05

Claims (6)

[Claims] 1. A heat-insulating coating liquid having a heat-retaining property and an anti-slip property, comprising a required amount of feather powder mixed with a coating mainly composed of a resin and a solvent. 2. A heat-insulating coating liquid having a heat-retaining property and an anti-slip property, comprising 5 to 50% of feather powder mixed with a coating mainly composed of a polyurethane resin and a solvent. 3. A heat-retaining method characterized by forming a coating liquid in which a required amount of feather powder is mixed with a coating mainly composed of a resin and a solvent, applying the coating liquid on the surface of a substrate and drying the coating liquid. A heat-insulating container with anti-slip properties. 4. A coating liquid comprising 5-50% of feather powder mixed with a coating mainly composed of a polyurethane resin and a solvent, and the coating liquid is applied to the surface of a substrate and dried. A heat-insulating container with heat retention and anti-slip properties. 5. A coated paper obtained by forming a coating liquid in which a required amount of feather powder is mixed with a coating mainly composed of a resin and a solvent, coating the coating liquid on the surface of a base paper, and drying. A paper heat-insulating container characterized in that the container is formed such that the coated surface is on the outside. 6. A coating liquid comprising a coating liquid mainly composed of a polyurethane resin and a solvent and a coating liquid containing 5 to 50% of feather powder, and coating the coating liquid on the surface of a base paper and drying the coating liquid. A paper-made heat-insulating container, wherein the container is formed using paper and the coated surface thereof is on the outside.