JPS6183037A - Manufacture of laminated sheet and manufacture of cup - 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 "Field of Industrial Application" The present invention relates to a method for manufacturing a novel laminated sheet and a method for manufacturing a cup using the sheet. The present invention relates to a method for producing a sheet that is laminated and adhered onto a substrate, as well as a method for processing and molding the sheet to produce, in particular, a cup for holding a cold beverage.

``Prior Art'' ``Problems to be Solved by the Invention'' Conventionally, paper cups impregnated with wax have been widely used as cups for cold drinks such as carbonated drinks. This wax-impregnated paper cup is made by impregnating the surface of the cup by spraying molten wax such as paraffin with a pleasant feeling after the cup is formed, thereby imparting water resistance and strength to the base paper. However, this wax-impregnated paper cup does not have sufficient pending properties, the manufacturing process is complicated, and the productivity is low:
l! ) and other problems.

On the other hand, paper cups coated with polyethylene are often used as cups for hot beverages such as coffee, but when cold beverages such as carbonated drinks are poured into these polyethylene-coated paper cups, a violent foaming phenomenon occurs, causing foam and contents to escape from the cup. There is a problem with overflowing.

"Means for Solving the Problems" The inventors of the present invention have endeavored to solve these problems. As a result of research, it was discovered that the above-mentioned problems could be solved at once by mixing a water repellent with a polyolefin resin and applying the mixture to a base material, thereby completing the present invention.

That is, the first aspect of the present invention is a method for producing a laminated sheet 1, which is characterized by laminating and adhering a mixture of polyolefin resin and a water repellent onto a base material, and the second aspect of the present invention is a method for manufacturing a laminated sheet 1, which is characterized by laminating and adhering a mixture of polyolefin resin and a water repellent agent onto a base material. The method of manufacturing a cup is characterized in that a mixture of resin and a water repellent is laminated and adhered onto a base material to obtain a laminated notebook, and then the laminated sheet is processed and molded into a cup.

The water repellent used in the present invention is not particularly limited as long as it is used as a food additive;
Preferred are aliphatic hydrocarbons such as polyethylene wax (manufactured by Sanyo Chemical Industries, Ltd.), and polyorganosiloxanes such as "Silicone Oil" (manufactured by Toshi Silicon Co., Ltd.).

As the olefin resin used in the present invention, any resin that is normally used for lamination adhesion can be used, and examples thereof include polyethylene, polypropylene, and copolymers thereof.

In the present invention, the blending ratio of the polyolefin resin and water repellent is 99 to 80% by weight of the polyolefin resin and 1 to 20% by weight of the water repellent. Volume % is preferred.

Water repellent is 1! If the amount is less than 1% by weight, the water repellent addition effect will not be sufficient, while if it exceeds 20% by weight, the melting temperature will be low and the melt viscosity will be lowered, resulting in poor processability.

As the base material used in the present invention, any material that can be used as a film or a sort-like material can be used, and examples thereof include paper, plastic, and various laminates.

Lamination adhesion in the present invention includes all known lamination methods such as extrusion lamination, dry lamination, wet lamination, and film adhesion, but extrusion lamination is particularly preferred from the viewpoint of production efficiency.

In carrying out the present invention, it is preferable to laminate and bond a mixture of a polyolefin resin and a hydraulic agent via a polyolefin resin. The intervening polyolefin resin may be the same polyolefin resin as mentioned above, and it is industrially desirable to carry out the above two-layer lamination at the same time using a two-layer extrusion die.

The heat treatment in the present invention is to transfer the water repellent to the surface of the laminated adhesive layer made of the polyolefin resin and water repellent on the base material and to make it unevenly distributed on the surface, and the temperature is room temperature to I20°C, Preferably 30~70℃, time 1~60℃
minutes, preferably 3 to 10 minutes. Heat treatment can occur either during the laminated ffi deposition process or after the process.

The laminated sheet of the present invention is particularly suitable as a cup for cold beverages, and is also useful as a release material that does not require a very high degree of releasability.

In order to manufacture a cup using the laminated sheet of the present invention, if paper is used as the base material, it may be cut out and molded (processed) into a cup, or a plastic film (
When a sheet (sheet) is used, the cup may be formed directly by vacuum forming or the like. In this case, the heat treatment may be carried out at any step from the lamination adhesion process to after cup processing/forming.

"Examples" The present invention will be described in more detail below with reference to Examples and Comparative Examples, but the present invention is not limited in any way by these.

Example 1 Low density polyethylene "Mirason M16pj (M13.7g/10 min, density 0.9
23 g/ctaS (manufactured by Mitsui Polyke ζcal Co., Ltd.) 90 parts by weight, and as a water repellent polyethylene wax "Sunwax 151 pJ (molecular weight 2000, degradable wax,
After mixing with 10 M parts (manufactured by Kochu Kasei Kogyo Co., Ltd.), the mixture was melted and mixed using a vent-two extruder (dice outlet 260°C), and pelletized using a pelletizer. After thoroughly drying the obtained pellets at 60°C, the pellets were put into a T-die extruder (
The cup base paper (245 g
/n? , manufactured by Shinetsu Valve Co., Ltd.) on the polyethylene surface.
Coated. The obtained laminated paper is not heat treated,
Heat treated at 70°C for 10 minutes using a dryer, 1
Each of the three types heat-treated at 20° C. for 10 minutes was molded into a cup as described later, and the foaming properties were tested.

Example 2 Polyethylene wax “Hiwax 20” was used as a water repellent.
0p, I (molecular weight 2000, polymerization type, Mitsui Petrochemicals!
II! A laminated paper was obtained by cultivating one mulberry in the same manner as in Example 1, except that a mulberry was used. The obtained laminated paper was subjected to the same foaming test as in Example 1.

Example 3 Polyethylene wax “Hiwax 40” was used as a water repellent.
A laminated paper was obtained in the same manner as in Example 1, except that 0 pJ (molecular weight 4000, polymerization type, manufactured by Mitsui Petrochemicals) was used. Regarding the obtained laminated paper, Example 1
It was subjected to the same foaming test.

Example 4 Polyethylene wax “Sunwax 16” as a water repellent
A laminated paper was obtained in the same manner as in Example 1 except that 5pJ (molecular weight 5000, decomposable type, manufactured by Kochu Kasei) was used. A foaming test similar to that in Example 1 was conducted on the cough 5 net paper.

Example 5 Polyethylene wax rLUVAX-11 as water repellent
A laminated paper was obtained in the same manner as in Example 1 except that 51J (Molecular 1700, Nippon Seirosha W) was used. The laminated paper was subjected to the same foaming test as that for A14+1.

Example 6 +8 Polyorganosyloxane "Silicone Oil 5H-200J (viscosity 3QOQQC5/25℃)
A laminated paper was obtained in the same manner as in Example 1, except that a laminate (manufactured by Toren Recon Co., Ltd.) was used. The laminated paper was subjected to the same foaming test as in Example 1.

Comparative Example II Polyolefin resin "Mirason M1fipJ" was extruded and made into a film without being pelletized, and cup base paper (
245g/c+! , manufactured by Shinetsu Pulp Co., Ltd.) was coated with a thickness of 30μ. The obtained laminated paper was subjected to the same foaming test as in Example 1.

Comparative Example 2 B] Noolefin resin "Mirason M16pJ alone was pelletized and filmed in the same manner as in Example 1, extruded onto cup base paper to obtain laminated paper, and a foaming property test was conducted in the same manner as in Example 1 and +=i. .

Comparative Example 3.4 As Comparative Example 3, commercially available wax cup and Comparative Example 4
A commercially available polyethylene-coated hot cup was subjected to a foaming test.

Cup molding and foaming test: Each of the above laminated papers was molded into a 9 oz cup using a cup molding machine manufactured by PMC, USA.Next, using the apparatus shown in Figure 1, the resulting cup was heated to a liquid temperature. Foaming properties were tested by injecting carbonated drinking water (Coca-Cola) at 10°C at an injection speed of 200 ml/6 seconds. The results are shown in Table 1.

Evaluation method: As shown in FIG. 2, the foam height was measured by injecting 100 cc of carbonated drinking water (Coca-Cola) and measuring the distance between the i-height position of the foam and the liquid level.

The contact angle was published in 9M magazine in 1984 [Polymer J334! , August issue, p. 639.

"Function""Effects of the Invention" Table 1 shows that the foaming properties of the cup of the present invention are significantly improved by the use of a water repellent compared to the polyethylene laminated paper cup (Comparative Example 1.2), and cup(
It is clear that the foaming property is as good as or better than that of Comparative Example 3).

In this way, it is possible to provide a cup that is more efficient in manufacturing than conventional wax-impregnated paper cups, has good handling characteristics, and is suitable for both hot and cold beverages.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing a foaming property testing apparatus according to the present invention, and FIG. 2 is a schematic diagram showing a foaming property measuring method. l... Holder, 2... Bottle 3... Noricon rubber stopper, 4.5... Glass tube 6... Cock, 7... Cup 8... Drinking water, 9... Sample drinking water (100cc)
10...foam, shi...foam height

Claims (1)

[Claims] 1. A method for producing a laminated sheet, which comprises laminating and adhering a mixture of a polyolefin resin and a water repellent onto a base material. 2. The manufacturing method according to claim 1, wherein the mixture is laminated and adhered onto a substrate via a polyolefin resin layer. 3. The manufacturing method according to claim 1 or 2, wherein a heat treatment is performed after the lamination bonding step or the lamination bonding step. 4. A method for producing a cup, which comprises laminating and adhering a mixture of a polyolefin resin and a water repellent onto a base material to obtain a laminated sheet, and then processing and molding the laminated sheet into a cup. 5. The manufacturing method according to claim 4, wherein the mixture is laminated and adhered onto a substrate via a polyolefin resin layer. 6. The manufacturing method according to claim 4 or 5, wherein heat treatment is performed in any step from the laminated sheet manufacturing process to after cup processing and molding.