JP2797289B2 - Lubricant for bottle conveyor belt and method of lubricating bottle conveyor belt - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a lubricant for a bottle conveyor belt and a method for lubricating a bottle conveyor belt.

Various bottle conveyors are used in the process of packing milk, soft drinks, beer, sake and the like. These bottle conveyors include bottles placed on the endless belt by rotating the attached endless belt,
It transfers bottles such as cans and plastic containers. Generally, a lubricant is used in the belt to reduce the kinetic frictional force between the surface of the belt and the bottles and promote smooth transfer of the bottles.

In recent years, in the bottle filling process as described above, further speedup and sterilization have been achieved, and therefore, even for lubricants for bottle conveyor belts, such speeding up and sterilization can be sufficiently coped with. It is required to have a high degree of lubricity and sterilization.

The present invention provides a lubricant for bottle conveyor belts and a method for lubricating bottle conveyor belts, which meets such demands.

<Conventional technology and its problems> Conventionally, a specific glycine derivative is blended as a lubricant for a bottle conveyor belt (Japanese Patent Publication No. 49-10794).
Examples in which an amphoteric surfactant having a bactericidal property or a quaternary ammonium salt type cationic surfactant is blended with an N-higher alkyl glycine or a higher alkyl amine (Japanese Patent Publication No. 49-17993). (Japanese Unexamined Patent Publication (Kokai) No. 1-96294), an example in which a quaternary ammonium type cationic surfactant having a bactericidal property and an anionic surfactant such as polyoxyethylene alkyl ether phosphate are blended (Japanese Unexamined Patent Publication No. −97592) and the like.

However, these conventional lubricants for bottle conveyor belts have a problem that they cannot simultaneously exhibit a high level of lubricity and bactericidal properties that can sufficiently cope with recent high speed and sterilization. If the lubricity and / or bactericidal properties are originally insufficient, or if the bactericidal properties are to be enhanced, the lubricity will decrease.

<Problems to be Solved by the Invention, Means for Solving the Problems> The present invention provides an improved lubricant for bottle conveyor belts and a method for lubricating bottle conveyor belts, which solves the above-mentioned conventional problems.

Thus, the present inventors have conducted intensive studies from the above viewpoint, and as a result, using a cationic surfactant having a bactericidal property at a predetermined concentration and using the cationic surfactant and a specific alkyl phosphate salt at a predetermined ratio, respectively. Has been found to be correct and suitable.

That is, the present invention is an aqueous solution containing a bactericidal cationic surfactant and an alkyl phosphate ester salt represented by the following general formula.
A lubricant for bottle conveyor belts, comprising an aqueous solution containing at least 01% by weight and said cathin-on surfactant / alkyl phosphate ester salt in a ratio of 10/3 to 10/10 (weight ratio). And, an aqueous solution of a cationic surfactant having a bactericidal property and an alkyl phosphate ester salt represented by the following general formula, and the concentration of the cationic surfactant is 0.01
The aqueous solution is supplied to a bottle conveyor belt as it is or while being diluted with water so that the weight ratio of the cationic activator / the alkyl phosphate ester salt is 10/3 to 10/10 (weight ratio). And a method of lubricating a bottle conveyor belt.

General formula: [However, R is an alkyl group or an alkenyl group having 8 to 22 carbon atoms. M is an alkali metal, amine or alkanolamine. n is 1 or 2. In the present invention, examples of the bactericidal cationic surfactant include tertiary amine compounds having 1 to 2 alkyl groups having 8 to 18 carbon atoms, such as methyl chloride, methyl bromide, benzyl chloride, and dimethyl sulfate. A quaternary ammonium compound, a pyridinium compound obtained by reacting an alkyl halide compound having 8-18 carbon atoms with pyridine or a pyridine derivative, an alkyl or alkenylimidazolinium compound having 7-17 carbon atoms, No. These can be used alone or in combination of two or more. Among these, preferred cationic surfactants are alkyltrimethylammonium halide, dialkyldimethylammonium halide, alkyldimethylbenzylammonium halide, dialkylmethylbenzylammonium halide, alkylpyridinium halide and the like.More specifically, cocoalkyltrimethylammonium Chloride, lauryltrimethylammonium chloride, cetyltrimethylammonium bromide, dioctyldimethylammonium chloride, didecyldimethylammonium chloride, cocoalkyldimethylbenzylammonium chloride, lauryldimethylbenzylammonium chloride, lauryltrihydroxyethylammonium hydroxide, laurylpyridinium bromide It is.

In the present invention, the alkyl phosphate ester salt represented by the above general formula is an alkyl phosphate obtained by reacting a higher alcohol having 8 to 22 carbon atoms with a phosphorylating agent such as phosphorus pentoxide, phosphorus oxychloride, polyphosphoric acid and the like. Phosphate ester,
These are alkali metal salts, amine salts and alkanolamine salts neutralized with alkali hydroxides, amines and alkanolamines. These can be used alone or in combination of two or more. Among these, preferred alkyl phosphate esters are lauryl phosphate, coco alkyl phosphate, cetyl phosphate, potassium salts such as stearyl phosphate, diethanolamine salts, triethanolamine salts, dimethylaminopropylamine salts, And ethylenediamine salts. In any case, those containing 70 mol% or more of a monoalkyl phosphate ester salt are preferable.

The lubricant for a bottle conveyor belt according to the present invention is composed of an aqueous solution containing a cationic surfactant and an alkyl phosphate salt as exemplified above,
The aqueous solution contains 0.01% by weight or more of the cationic surfactant and 3 to 10 parts by weight of the alkyl phosphate salt with respect to 10 parts by weight of the cationic surfactant. As will be described in detail later, the concentration of the cationic surfactant on the surface of the bottle conveyor belt becomes 0.01 to 0.1% by weight, and the cationic surfactant / the alkyl phosphate salt = 10/3 to 10/10 By supplying these aqueous solutions to the surface of the bottle conveyor belt as they are or while diluting them with water so as to have a ratio of (weight ratio), a remarkable decrease in the dynamic friction force between the bottles on the surface of the bottle conveyor belt and the bottles is recognized. At the same time, a high bactericidal effect is observed. Even if the ratio of the alkyl phosphate ester salt is more than 10 parts by weight with respect to 10 parts by weight of the cationic surfactant, lubricity is not improved for that proportion, but rather, sterilization property is deteriorated. In view of the handling property, it is preferable that the concentration of the alkyl phosphate salt in the treating agent is adjusted to be 5% by weight or more, and in this case, the treating agent is consequently formed on the surface of the bottle conveyor belt. The treatment agent is supplied to the surface of the bottle conveyor belt while diluting with water so that the concentration of the above-mentioned cationic surfactant contained in the treatment agent becomes 0.01 to 0.1% by weight.

The lubricant for the bottle conveyor belt according to the present invention is, in addition to the cationic surfactant and the alkyl phosphate ester salt as exemplified above, if necessary, to prevent contamination of the bottle conveyor belt, polyoxyethylene alkyl ether Nonionic surfactants such as polyoxyethylene alkylphenyl ethers, polyethylene glycol fatty acid esters, and alkylamine ethylene oxide adducts, EDTA-4N for preventing the formation of deposits in lubricant supply lines
a, chelating agent such as EDTA-2Na, to prevent foaming that inhibits the function of the vial, defoaming agent such as silicon, liquid paraffin, polyoxyethylene / polyoxypropylene condensate, for stabilizing the formulation, Stabilizers such as alcohols and glycols may be appropriately contained within a range that does not impair the effects of the present invention.

The method for lubricating a bottle conveyor belt according to the present invention uses a bactericidal cationic surfactant and an alkyl phosphate salt in the form of an aqueous solution diluted in water, and includes 1) bactericidal properties. An aqueous solution containing a cationic surfactant and an alkyl phosphate ester salt is prepared, and the resulting cationic surfactant / alkyl phosphate ester salt on the surface of the bottle conveyor belt = 10
A method of supplying the aqueous solution as it is or while diluting it with water so as to have a ratio of / 3 to 10/10 (weight ratio) onto the surface of the bottle conveyor belt. 2) An aqueous solution containing a bactericidal cationic surfactant And an aqueous solution containing an alkyl phosphate salt are separately prepared, and as a result, the cationic surfactant / the alkyl phosphate salt = 10/3 to 10/10 (weight ratio) on the bottle conveyor belt surface. The following methods 1) and 2) are available in which both aqueous solutions are supplied onto the surface of a bottle conveyor belt as they are or while being diluted with water so that the ratio is as follows. In any method, the concentration of the resulting cationic surfactant having a bactericidal property on the surface of the bottle conveyor belt is from 0.01 to 0.01.
The content is 0.1% by weight, preferably 0.02 to 0.05% by weight. These aqueous solutions are supplied from the lubricant supply device onto the surface of the bottle conveyor belt continuously or intermittently as appropriate according to the speed of the bottle conveyor belt and the amount of bottle transport thereby. At the time of the supply, a nonionic surfactant, a chelating agent, an antifoaming agent, a stabilizer, and the like as described above can be used in combination.

Hereinafter, examples and the like will be described in order to make the configuration and effects of the present invention more specific, but the present invention is not limited to these examples.

<Examples> Test Category 1 (Synthesis of alkyl phosphate ester salt) 1) Synthesis of alkyl phosphate ester salt (LP-K) 186 g (1.0 mol) of lauryl alcohol was charged into a reaction vessel and kept at 50 ° C. 47.3 g (0.33 mol) of phosphoric anhydride was gradually added to the mixture, and the reaction was continued at 50 to 60 ° C. for 1 hour and aged for 1 hour to complete the reaction.

The obtained product is subjected to neutralization titration using a potentiometric titrator, and the neutralization value at the primary neutralization point and the secondary neutralization point is measured.
Dialkyl phosphate (molar ratio, abbreviated as M / D hereinafter)
Was calculated. M / D = 43/57.

The resulting alkyl phosphate ester is neutralized by adding an equivalent aqueous solution of 40% by weight potassium hydroxide at a neutralization value, and potassium lauryl phosphate (LP-LP) containing 65% by weight of solids is added. K) was synthesized.

2) Synthesis of monoalkyl phosphate salt (MLP-K) Dry lauryl alcohol having a water content of 0.1% by weight or less 1
86 g (1.0 mol) and 9.3 g of the product (unneutralized alkyl phosphate) obtained in the synthesis of LP-K were charged into a reaction vessel and uniformly dissolved. 8 g (0.44 mol) of water was added to this,
Stir vigorously, dissolve in lauryl alcohol, 35 ° C
Held. Then, 71.0 g (0.50 mol) of phosphoric anhydride was gradually added, the reaction was continued at 40 to 45 ° C. for 2 hours, and aging was further performed for 2 hours to complete the reaction.

 M / D of the obtained product was 95.1 / 4.9.

The obtained product alkyl phosphate ester was neutralized in the same manner as in the synthesis of LP-K, and the solid content was 60% by weight.
Potassium monolauryl phosphate (MLP-
K) was synthesized.

The following alkyl phosphate ester salts 3) to 9) were synthesized in the same manner as in the synthesis of LP-K or MLP-K.

3) Triethanolamine / monococo alkyl phosphate (MYP-TEA) M / D = 72/28, solid content 99% by weight or more 4) Potassium / monolauryl phosphate (MLP-TEA)
K) M / D = 95.1 / 4.9, solid content 60% by weight 5) Potassium lauryl phosphate (LP-K) M / D = 43/57, solid content 65% by weight 6) Triethanolamine lauryl phosphate Ester (LP-TEA) M / D = 43/57, solid content 99% by weight or more 7) Dimethylaminopropylamine / lauryl phosphate (LP-DMAP) M / D = 53/47, solid content 99% by weight or more 8) Sodium cetyl phosphate (CP-Na) M / D = 50/50, solid content 70% by weight 9) Triethanolamine polyoxyethylene (3 mol) lauryl phosphate (LL-3P-TEA) M / D = 42/58, solid content 99% by weight or more Test category 2 (Preparation of lubricant) Example 1 10 parts by weight of cetyltrimethylammonium bromide and 10 parts of cocoalkyldimethylbenzylammonium chloride as bactericidal cationic surfactants Parts by weight,
In a dissolution tank, 10 parts by weight of LP-TEA, 2 parts by weight of polyoxyethylene (10 mol) lauryl ether and 68 parts by weight of water as an alkyl phosphate ester salt are stirred and dissolved to prepare a uniform lubricant (Example 1). did.

Similarly, lubricants (Examples 2 to 10 and Comparative Examples 1 to 6) having the composition shown in Table 1 were prepared.

Test Category 3 (Evaluation of Lubricity and Sterilization) Using each lubricant shown in Table 1, prepare an aqueous solution diluted with water so as to have the dilution ratio shown in Table 2 or Table 3. The lubricating and sterilizing properties of each of these aqueous solutions were evaluated by the following methods. The results are shown in Table 2 (lubricity) and Table 3 (bactericidal).

··· Lubricity The test was performed using the test machine shown in FIG. The test machine includes a driving sprocket 3 that rotates through a chain 2 with a motor 1.
An endless belt 5 is mounted between the belt 5 and the floating sprocket 4, and the base end of a thread 7 wound around a bottle 6 placed on the belt 5 is connected to a load meter 9 via a pulley 8. An aqueous solution of the lubricant filled in the container 10 is supplied at the left edge of the belt 5, and cleaning water is supplied at the right edge of the belt 5. When the belt 5 is rotated clockwise while supplying the aqueous solution of the lubricant and the washing water, a load is applied to the bottle 6 placed on the belt 5, and the load is measured by the load meter 9 via the thread 7.

The load was measured five times every 30 seconds from 10 minutes after the operation rotation under the following conditions, and the average value was taken as the load. The results are shown in Table 2. The smaller the load, the better the lubrication performance.

… Conditions Belt speed: 30m / min Supply of aqueous solution of lubricant; 30ml / min Wash water supply: 3 / min Bottle used: 4 633ml beer bottles ・ ・ Bactericidal property .

... Test method: Tested in accordance with the sanitary inspection guidelines "Disinfectant inspection guidelines". The action time was 10, 30, 60 minutes. 25 ℃
After culturing for 48 hours, the presence or absence of bacterial growth was observed. The results are shown in Table 3, where + indicates the growth of the bacterium and-indicates the death of the bacterium.

・ ・ ・ ・ Test bacteria; NO.1 Escherichia coli NO.2 Serratia morcescens NO.3 Achromobacter xylosoxidans ・ ・ ・ Bacterial liquid preparation; Standard cold spot One platinum loop of a colony cultured on a plate at 25 ° C for 24 hours was suspended in 10 ml of sterilized distilled water (10 ⁷ /
1ml).

Test section 4 (measurement of average number of inverted bottles and average number of viable bacteria) In a beer production line in which 633 ml beer bottles are filled at 1,000 bottles / minute, the lubricants of Examples 5, 7 and Comparative Example 4 are each multiplied by 250. The aqueous solution diluted with water was dropped on the bottle conveyor belt at a rate of 300 ml / min and operated continuously for 8 hours. The number of fallen bottles after beer filling was measured, and 1
The average number of bottles per hour was calculated.

Five hours after the start of operation, two bottle conveyor belt plates were treated as one unit and sterilized gauze (10 ×
The surface was wiped off using 10 cm), and the number of viable cells was measured under the following culture conditions. Each of the three locations was wiped, and the average value of the viable count was determined. Table 4 shows the results of the average number of inverted bottles and the average number of viable bacteria.

・ ・ Culture conditions For bacteria: 48 hours at 25 ° C on standard agar medium For yeast and fungi: 5 days at 25 ° C at Sabouraud agar medium -Test category 5 (measurement of average number of bottles and viable count) In the same beer filling line as in test category 4,
An aqueous solution of the following A and an aqueous solution of the following B, which were separately prepared, were dropped on a bottle conveyor belt at a rate of 150 ml / min, respectively, and operated continuously for 8 hours.

Thereafter, the average number of inverted bottles and the average number of viable bacteria were measured in the same manner as in Test Category 4. The results are shown in Table 5.

A: Aqueous solution containing 0.1% by weight of cocoalkyldimethylbenzylammonium chloride. B: Aqueous solution containing 0.05% by weight of the alkyl phosphate described in Table 5 and 0.014% by weight of polyoxyethylene (10 mol) lauryl ether. <Effects of the Invention> As is clear from the results of the tables, the present invention described above can exhibit a high degree of lubricity and sterilization that can sufficiently cope with recent speedup and sterilization. effective.

[Brief description of the drawings]

FIG. 1 is a front view schematically showing a test machine used in the present invention. 1 ... motor, 5 ... belt, 9 ... load cell

────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yasunari Kira 3-6-115 Kuragakiuchi, Ibaraki-shi, Osaka (56) References JP-A-2-97592 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) C10M 173/02 C10M 137/04 C10M 133/04 C10N 40:00

Claims (5)

(57) [Claims] An aqueous solution containing a bactericidal cationic surfactant and an alkyl phosphate salt represented by the following general formula, wherein the cationic surfactant is present in an amount of 0.01% by weight.
A lubricant for a bottle conveyor belt, comprising an aqueous solution containing the above cationic surfactant / alkyl phosphate ester salt in a ratio of 10/3 to 10/10 (weight ratio). General formula: [However, R is an alkyl group or an alkenyl group having 8 to 22 carbon atoms. M is an alkali metal, amine or alkanolamine. n is 1 or 2. ] 2. The lubricant for a bottle conveyor belt according to claim 1, wherein the alkyl phosphate ester salt represented by the general formula contains at least 70 mol% of a monoalkyl phosphate ester salt. 3. An aqueous solution containing a cationic surfactant having a bactericidal property and an alkyl phosphate salt represented by the following general formula is prepared, and the concentration of the cationic surfactant is 0.01%.
To 0.1% by weight and the ratio of the cationic surfactant / the alkyl phosphate salt = 10/3 to 10/10 (weight ratio). A method of lubricating a bottle conveyor belt, characterized by supplying. General formula: [However, R is an alkyl group or an alkenyl group having 8 to 22 carbon atoms. M is an alkali metal, amine or alkanolamine. n is 1 or 2. ] 4. An aqueous solution containing a bactericidal cationic surfactant and an aqueous solution containing an alkyl phosphate salt represented by the following general formula are separately prepared, and the concentration of the cationic surfactant is from 0.01 to 0.01. 0.1% by weight and the cationic surfactant / the alkyl phosphate salt = 10/3 to
A method for lubricating a bottle conveyor belt, wherein both aqueous solutions are supplied to the bottle conveyor belt as they are or while being diluted with water so as to have a ratio of 10/10 (weight ratio). General formula: [However, R is an alkyl group or an alkenyl group having 8 to 22 carbon atoms. M is an alkali metal, amine or alkanolamine. n is 1 or 2. ] 5. The method for lubricating a bottle conveyor belt according to claim 3, wherein the alkyl phosphate ester salt represented by the general formula contains a monoalkyl phosphate ester salt in an amount of 70 mol% or more.