JPH04327297A - Slip-proofing agent composition - Google Patents

Abstract

PURPOSE:To obtain the title composition useful for corrugated box, excellently preventing collapse of show containing whiskers. CONSTITUTION:The objective composition comprising whiskers of calcium sulfate having 2-9 Mohs hardness, 1-5mum fiber diameter and 30-70mum fiber length and one or more selected from colloidal silica, aluminum sol, water glass, resin emulsion and water-soluble polymer. Kraft paper is coated with 1.0g/m<2> based on dried weight of the composition by a bar coater and dried to give packing paper having slip resistance.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-slip agent composition which is applied to paper containers such as cardboard boxes and various wrapping papers to impart anti-slip properties and prevent the cargo from collapsing.

0002

2. Description of the Related Art A large number of products such as beer, soft drinks, canned fruits and side dishes, agricultural and marine products, clothing, and other industrial products are packed and handled in paper containers such as cardboard boxes and cartons. These items are usually transported or stored in a stacked state, but vibrations and tilting can cause them to slip, causing the cargo to collapse. Particularly in recent years, beer and other beverages have become increasingly canned, and many of the boxes are heavy. If these boxes collapse, this not only reduces work efficiency and damages the contents, but also causes serious personal injury. The danger of being connected is also increasing. Conventional methods for preventing cargo from collapsing include methods of fixing cardboard boxes to each other, such as binding or shrink film treatment, and methods of applying an anti-slip agent to the surface of the cardboard boxes. Anti-slip agents are broadly divided into two types: adhesive and non-adhesive. Adhesive adhesives include hot melt adhesives such as ethylene-vinyl acetate copolymer resin (EVA), acrylic resins, styrene resins,
Emulsions such as EVA are used, and typical non-adhesive materials include alumina, fine particles of silicic anhydride, and colloidal silica.

0003

[Problems to be Solved by the Invention] However, these conventional methods have been pointed out to have the following problems. Binding and shrink film treatments can certainly prevent cargo from collapsing, but the costs of materials and processing are high, and reshipping requires reprocessing. With adhesive anti-slip agents, dirt and dust adhere to the adhesive surface, impairing its appearance, and the surface tends to peel off due to blocking.Also, even if it does not cause damage due to peeling, it can interfere with handling on automatic packaging lines. Easy to do. Furthermore, hot-melt adhesives not only require retreatment when reshipping, but also cause peeling of the adhesive-applied surface, impairing the appearance. Although non-adhesive materials do not cause blocking problems, repeated reloading operations tend to significantly reduce the anti-slip effect, and silicic anhydride and colloidal silica significantly wear down equipment such as printing presses.

0004

[Means for Solving the Problems] The present inventors have conducted intensive research to develop an anti-slip agent that overcomes the drawbacks of these anti-slip agents, and as a result, we have developed a method using whiskers (acicular crystals that resemble cat whiskers). It was discovered that by doing so, it was possible to obtain an anti-slip agent that not only overcomes the above-mentioned drawbacks but also improves its anti-slip effect the more it is reloaded, and based on this knowledge, the present invention was completed. That is, the present invention is an anti-slip composition characterized by containing whiskers.

The Mohs hardness of the whisker used in the present invention is preferably about 2 to 9, but preferably about 2.5 to 4, taking into account wear of equipment. In addition, the fiber diameter is 0.1μ
It is sufficient if the fiber length is about 5 μm to 200 μm, but preferably the fiber diameter is about 1 μm.
~5 μm, with an average fiber length of around 30 to 70 μm. Types of whiskers include calcium sulfate, silicon carbide, silicon nitride, potassium titanate, aluminum borate, zinc oxide, basic magnesium sulfate, magnesium borate, titanium diboride, magnesium oxide, graphite, aluminum nitride, and alumina. However, there is no problem with compositions other than these as long as the anti-slip effect can be obtained. Among these, calcium sulfate, calcium titanate, and basic calcium sulfate can be cited considering the Mohs hardness and fiber size mentioned above, but whiskers of calcium sulfate (anhydrous salt, hemihydrate salt) have the most anti-slip effect. High and optimal.

Furthermore, in the present invention, by using whiskers together with a resin emulsion, colloidal silica, or alumina sol that has been conventionally used as an anti-slip agent, whitening of the coated surface due to the whiskers can be reduced without reducing the anti-slip effect. This is effective because it can improve the blocking properties of resin emulsions and reduce wear on colloidal silica equipment. Furthermore, by using whiskers in combination with water glass, resin emulsion, or water-soluble polymer, it is possible to prevent the coated surface from falling off and improve durability. The types and properties of the alumina sol, water glass, colloidal silica, resin emulsion, and water-soluble polymer mentioned here are not particularly limited. Furthermore, this does not preclude the use of anti-slip agents or additives other than those listed here. In order to apply it as an anti-slip agent, an appropriate amount of the whisker or the above-mentioned combination product may be dispersed in water and applied to the surface of corrugated paper or the like. Coating methods and equipment include calender,
Any method such as a roll coater, size press, spray or brush coating may be used.

[0007]

[Examples] The present invention will be explained below with reference to Examples. (Example 1) Formulation Example 1 Dispersing calcium sulfate whiskers in water Formulation Example 2 Uniformly dispersing a mixture of calcium sulfate whiskers/colloidal silica = 5/5 in water Formulation Example 3 Mixture of calcium sulfate whiskers/alumina sol = 5/5 Uniformly dispersed in water Formulation example 4 A mixture of calcium sulfate whiskers/resin emulsion (styrene acrylic) = 7/3 was uniformly dispersed in water Formulation example 5 Calcium sulfate whiskers/water glass = 5
/5 mixture uniformly dispersed in water Comparative Example 6 Calcium sulfate whiskers/water-soluble polymer (polyvinyl alcohol) = 9.5/0.5 mixture uniformly dispersed in water Comparative Example 1 Colloidal silica (commercially available anti-slip agent) ) Comparative example 2
Resin emulsion (commercially available anti-slip agent: styrene acrylic) The compositions of Formulation Examples 1 to 6 and Comparative Examples 1 to 2 were applied to kraft paper at a rate of 1.0 g/m2 per dry weight using a bar coater, and dried in a dryer (105 ℃, 30 seconds) after drying at 20℃
A test sample was prepared by controlling the humidity in a constant temperature room with 50% RH. The sliding test was conducted in the same temperature controlled room according to JIS P-8147 method. Blocking test at 40℃, 90%RH
The composition-applied surfaces were placed one on top of the other in a constant temperature room, and a distance of 10 cm was placed between them.
A load of 5 kg was applied to an area of 10 cm x 10 cm, and the condition after being left for 24 hours was observed and evaluated according to the criteria in Table 1. In addition, all the compounding ratios of Compounding Examples 2 to 6 are weight ratios.

[0008]

[Table 1] To determine the shedding strength, a natural bristle brush was attached to a device imitating a Sutherland tester, and after rubbing the coated surface 100 times, a slip test similar to the above was performed. Whitening was visually evaluated according to the criteria shown in Table 2.

[0009]

[Table 2] The results of each test are shown in Table 3.

0010

[Table 3]

[0011] From Table 3, it can be seen that the anti-slip agent using whiskers has higher anti-slip performance than conventional products, and is especially excellent in anti-slip performance after repeated reloading. Furthermore, it can be seen that problems such as whitening caused by whiskers and strength of the coated film surface can be overcome by making up a mixture with other agents as in the present invention, thereby making it even more excellent. It goes without saying that this embodiment is just an example and does not limit the present invention in any way.

0012

Effect of the invention: By using whiskers as the main component of the anti-slip agent as in the present invention, a sufficient anti-slip effect can be obtained without damaging the surface of cardboard boxes, etc., and the anti-slip effect can be improved by repeated reloading, which is a disadvantage of the conventional method. It is suitable as an anti-slip agent, as it not only eliminates the decrease in viscosity, but also improves its anti-slip effect the more it is reloaded.

Claims (2)

[Claims] [Claim 1] An anti-slip agent composition characterized by containing whiskers. 2. An anti-slip agent composition containing whiskers and one or more selected from colloidal silica, alumina sol, water glass, resin emulsion, and water-soluble polymer.