JP2008106253A - Conveyor lubricant - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lubricant for a conveyer which can give sufficient lubricating ability by spreading on an upper surface of the conveyer by supplying a minimum required amount of the lubricant on an upper surface and/or a back surface of the conveyer. <P>SOLUTION: The lubricant comprises A: at least one of an alkyl polyoxyalkylene glycol type nonionic surfactant, a polyethylene glycol type nonionic surfactant and a polyoxyethylene/methyl polysiloxane copolymer type nonionic surfactant, B: at least one of a polyoxyethylene alkyl ether acetic acid, a polyoxyethylene alkenyl ether acetic acid and their salts, and an acyl amino acid type anionic surfactant, C: at least one of aliphatic alkylamines and its salts, and D: at least one of an alkylamino carboxylic acid type amphoteric surfactant and a glycine type amphoteric surfactant, and further a high boiling point solvent and water. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a lubricant composition for transport conveyors for transporting various containers such as bottles, cans, PET bottles, paper packs, etc., in particular for use in trace amounts in stock solutions without the need for dilution with water. The present invention relates to a lubricant composition for conveyors.

  Bottles and cans, PET bottles, paper packs in milk, beer, liquor, soft drinks, juices, seasonings, sauces, various canned foods, foods (hereinafter referred to as “food and beverage”), medicines, cosmetics, and tabletop gas cylinders In the process of filling containers such as these (hereinafter collectively referred to as containers, etc.), as a means for transporting these containers, a transport conveyor in which a large number of conveyor plates are connected endlessly in the transport direction is widely used. ing. In addition, conveyance conveyors, such as a container, are also called a bottle conveyor.

  Container conveyors are normally continuously operated by automatic control, and it is necessary to stably transport containers and to allow only the conveyor to be continuously operated even when the flow of containers and the like stops. . For this reason, when placing the container etc. carried from the washing machine on the flow of the bottle conveyor surface as it is, it is preferable that the conveyor surface has an appropriate static friction force. When stopping the flow of the container etc., the container It is preferable that the surface of the conveyor in contact with the lower kinetic friction force. In order to satisfy both of these requirements, a lubricant for conveyor has been usually applied to the conveyor surface.

  Conventionally known as this type of conveyor lubricant is a fatty acid soap lubricant comprising a fatty acid alkali salt obtained by a reaction between a fatty acid and an alkali as a main component and, if necessary, a surfactant or the like added thereto. Yes. This is usually used by diluting with water 100-200 times or more and applying or spraying on the bottle conveyor surface. Moreover, in the lubricant for conveyors which have a nonionic surfactant as a main component, it is used by diluting 400 to 800 times or more with water and applying or spraying on the surface of the bottle conveyor. .

  Since the conveyor is normally continuously operated by automatic control, only the conveyor may be continuously operated as it is even if the container flow on the conveyor stops. In this case, friction occurs between the container and the plate surface of the conveyor, causing the motor load to increase abnormally, damaging the container, causing the container to fall, cracking, or damaging it, reducing this friction. It is necessary to let

  Conventionally, a water-soluble conveyor lubricant composition has been used as a lubricant that satisfies the above requirements.

  For example, such a water-soluble conveyor lubricant composition includes (1) a lubricant composition for conveyors mainly composed of higher fatty acid soaps, and (2) anionic interfaces of alkyl phosphate esters and polyoxyethylene alkyl phosphate esters. Examples thereof include a lubricant composition for conveyors mainly composed of an activator.

  However, although they are excellent in lubrication performance, they are affected by the hardness of the dilution water to produce water-insoluble metal soap, which adheres as a scale. In addition, this product blocks the nozzle hole of the spray when supplying the lubricant aqueous solution, contaminates the conveyor surface, or these stains become a hotbed of microorganisms to form a fungus nest on the conveyor. It can be a cause.

  Therefore, in order to solve such a problem, a large amount of a chelating agent such as ethylenediaminetetraacetate may be added to give an effect of suppressing the adhesion of scale. However, since such a chelating agent is poor in microbial degradability, there is a problem that it is difficult to decompose even if the wastewater containing it is treated in an activated sludge tank.

  On the other hand, in order to eliminate the above-mentioned drawbacks, (3) Japanese Examined Patent Publication No. 7-35516 proposes a lubricant composition for conveyors using acetates and hydrochlorides of aliphatic alkylamines as main components. (See Patent Document 1). The lubricant composition for conveyors mainly composed of acetates and hydrochlorides of aliphatic alkylamines has excellent sterilizing power and detergency without being affected by the hardness of the diluted water. It is superior to the conveyor lubricant composition of (1) and (2). However, when diluted in water, the lubrication performance is inferior and the wettability is also inferior, so that the lubricant does not spread on the conveyor surface, and it may be necessary to select a supply spray nozzle or supply an excessive amount. .

  Moreover, the diluent of the lubricant composition for conveyors and an anionic component (phosphoric acid, a sulfuric acid, carbonic acid, etc.) react, and a water-insoluble complex is produced | generated. This product clogs the nozzle holes of the spray when supplying the aqueous lubricant solution, contaminates the surface of the conveyor, or further, these stains become a hotbed of microorganisms and form fungus nests on the conveyor. ing.

  JP-A-10-158681 discloses (4) a lubricant mainly composed of a polyethylene glycol type nonionic surfactant (see Patent Document 2), and JP-A-2002-275483 discloses (5). A lubricant mainly composed of polyoxyethylene alkyl or alkenyl acetic acid or a salt thereof (see Patent Document 3), Japanese Patent Application Laid-Open No. 2004-315634 includes (6) amphoteric surfactants (alkylaminopropionic acid, alkyldiaminoethyl). There have been proposed water-soluble lubricants that are hardly affected by the hardness of the diluted water and anionic components, such as lubricants mainly composed of glycine, alkylbetaines, and alkylimidazolinium betaines (see Patent Document 4). When these lubricants are also diluted in water, they often have problems such as poor lubrication performance or foaming properties depending on the type of container and conveyor plate material, and are used only in some production processes. There are many cases.

  The water-soluble lubricants (1) to (6) as described above have been devised on the assumption that they are all diluted with water and used as a lubricant diluent. As an example of the method of use, a lubricant stock solution for conveyor is prepared by blending solubilizer, disinfectant and the like with the lubricant for conveyors of the above (1) to (6), and a dilution device is mainly used. This is diluted with water to about 2 to 1000 times and used as a lubricant diluent, sprayed from the nozzle provided on the upper part of the conveyor, or by brushing the upper surface of the conveyor, about 30 to 300 ml / min. There is a method of supplying in proportion.

  For this reason, for example, in the case of a production factory for a line-scale food and drink having 100 to 200 supply points, a large amount of lubricant diluent of about 1.5 to 20 tons / day (operating for 8 hours) is required. A large amount of money was required for water treatment of the diluted lubricant after use. Further, in the case of such a large amount of use, since a conveyor lubricant of about 10 to 200 kg / day (operating for 8 hours) is required, the container form of the lubricant for conveyor is a chemical drum or 500 kg to 1 ton capacity. The size of the container may increase, which may cause problems with the transport method and installation / storage location.

On the other hand, a lubricant containing a silicone compound or a fluorine compound has been proposed. For example, Japanese Patent Publication No. 2003-529627 contains 1% by weight or more of polysiloxane based on the total formulation, and further includes one or more selected from fluorine compounds and polyhydroxy compounds and / or ethers and esters thereof. Polysiloxane-based lubricants containing components and uses thereof are disclosed, and the application system is preferably in direct contact with the surface to be lubricated during application, and the formulation is made up of 10,000 to It is disclosed to dilute 100 times and use a spray applicator as an application system (see Patent Document 5).

  Also, as a lubricant composition distribution device and supply method, for example, in Japanese Translation of PCT International Publication No. 2002-519611, it is composed of a collection tube exhibiting a plurality of lateral perforations, and preferably a high-density felt. Disclosed is a dispensing device for a lubricant composition that uniformly distributes the lubricant composition over the entire conveyor by including a hollow body containing therein an absorbent felt fabric partially protruding from the body through a bottom opening. (See Patent Document 6).

  Further, as a minute supply technology by spraying, for example, Japanese Patent Application Laid-Open No. 2001-141182 discloses spray oiling in which oil from a quantitative pump that sucks and discharges oil in an oil tank is made into a mist-like oil mist by an atomizer. In the device, a cyclone that selectively sorts and discharges oil mist from the oil mist with centrifugal force generated internally is provided, and the oil mist is separated into large and small sizes by this cyclone, and the particle size is reduced and aligned. Has been disclosed (see Patent Document 7).

  In JP-A-6-249396, a plurality of nozzle tip portions corresponding to respective lubrication objects are connected, and an oil / air device conveys lubricating oil by an air flow and supplies it to an intermittent distributor, and The control device controls the intermittent distribution device and the oil / air device so that the lubricating oil and the air flow sent from the oil / air device are mixed and supplied to each lubrication object intermittently from the tip of multiple nozzles. To do. Further, the intermittent distributor supplies most of the air flow and lubricating oil sent from the oil / air device to one tip of the plurality of nozzle tips, and the remaining appropriate tip to the other tip. A lubricating oil supply device that supplies a very small amount is disclosed (see Patent Document 8).

Japanese Patent Laid-Open No. 6-171619 discloses a conveyor sterilization and lubrication method in which a plurality of ejection nozzles are provided on the side and lower side of the conveyor, and the conveyor device, and the spray amount of the ejection nozzle is controlled by a control unit. Basically, it is disclosed that the ejection amount is set so that the surface of the endless member (conveyor plate) of the conveyor is always wet (see Patent Document 9).
Japanese Patent Publication No. 7-35516 Japanese Patent Laid-Open No. 10-158681 Japanese Patent Laid-Open No. 2002-275483 JP 2004-315634 A Japanese translation of PCT publication No. 2003-529627 Japanese translation of PCT publication No. 2002-519611 JP 2001-141182 A JP-A-6-249396 JP-A-6-171619

  Conventionally, a lubricant for conveyors is used at a rate of about 30 to 300 ml / min by spraying or applying so that the lubricant dilution liquid is sufficiently distributed not only on the upper surface of the conveyor but also on the rear surface. For this reason, a large amount of a lubricant diluent is required, and the water treatment cost of the lubricant diluent after use is high, so that improvement has been demanded. In addition, there is a need for a more compact container configuration with improved storage space and transportation costs. Accordingly, an object of the present invention is to provide a lubricant for a conveyor that can be spread on the upper surface of the conveyor and give sufficient lubrication performance by supplying the minimum amount required on the upper and / or back surface of the conveyor. It is to be.

  As a result of intensive studies to solve the above problems, the present inventors have not diluted with water as in the prior art, and containers such as bottles, cans, PET bottles, paper packs, etc., stainless steel, iron, and resins It eliminates friction with the (plastic) conveyor plate, does not cause the above-mentioned residual wear, suppresses foaming, and is insoluble by water hardness components and lubricants even when hard water is mixed. We have succeeded in developing a lubricant composition for conveyors that has excellent lubrication performance and microbial contamination prevention performance without forming a complex.

This invention is a lubricant composition for container conveyance conveyors used in order to supply to the surface and / or back surface of a conveyor plate, without diluting with water, Comprising: (A)-(D) below
A: at least one of an alkyl polyoxyalkylene glycol type nonionic surfactant, a polyethylene glycol type nonionic surfactant, and a polyoxyethylene / methylpolysiloxane copolymer type nonionic surfactant;
B: at least one of polyoxyethylene alkyl ether acetic acid, polyoxyethylene alkenyl ether acetic acid and salts thereof, and acylamino acid type anionic surfactant;
C: at least one of aliphatic alkylamines and salts thereof;
D: at least one of an alkylaminocarboxylic acid type amphoteric surfactant and a glycine type amphoteric surfactant;
A lubricant composition for conveyors comprising at least one selected from the group consisting of: a high-boiling solvent, and water.

  Preferably, the content of the components (A) to (D) in the lubricant composition for conveyors is 0.1 to 50% by mass. Preferably, the content of the high boiling point solvent in the lubricant composition for conveyors is 10 to 98% by mass. Preferably, the content of water in the lubricant composition for conveyors is 80% by mass or less, and more preferably 50% by mass or less. In addition, in this specification, content of each component in a composition is represented by weight%.

The conveyor lubricant composition of the present invention is applied to supply a small amount continuously or intermittently to the front surface and / or back surface of the conveyor plate at a rate of 1.0 × 10 ^{−6 to} 1.0 g / cm ² . Or it can be sprayed.

According to the present invention, without diluting the lubricant composition for conveyors (hereinafter also referred to as the lubricant composition) with water, at a constant rate of 1.0 × 10 ^{−6 to} 1.0 g / cm ² , In a conveyor made of metal mainly made of materials such as iron or stainless steel or a conveyor made of plastic made of materials such as polyacetal resin, the desired lubrication is achieved by continuously or intermittently supplying the conveyor plate surface and / or back surface. Performance can be obtained.

Further, since the lubricant composition of the present invention is supplied in a small amount at a rate of 1.0 × 10 ^{−6 to} 1.0 g / cm ² without being diluted with water, the amount of the lubricant composition used is greatly increased. Less. For this reason, the delivery management operation | work of a lubricant composition and its expense, the storage place of a lubricant composition, etc. are reduced.

  Furthermore, since the lubricant composition of the present invention is used in a stock solution without being diluted with water, generation of microorganisms and contamination by microorganisms can be prevented. Further, there is almost no adhesion of dirt on the conveyor plate, and there is an advantage that foaming does not occur on the conveyor plate and the drain plate as in the prior art. In addition, the amount of water used is drastically reduced, and the amount of drainage due to the lubricant diluent used for lubricating the conveyor is also drastically reduced. This has the advantage of reducing wastewater treatment work and wastewater treatment costs.

  In addition, since the lubricant composition of the present invention does not contain a petroleum solvent or the like as an essential component, it does not generate a mineral oil odor and has an advantage of being hygienic to food and beverage factories.

  Lines with container conveyors are premised on the use of water and steam (steam) in container filling, sterilization, heating, cooling, and labeling processes. Water falls. These waters are often used with high hardness, and must be highly diluted where water always enters. The lubricant composition of the present invention is soluble in water even when such water is mixed, maintains excellent lubrication performance, and generates stains without forming a water-insoluble complex due to hardness components. I won't let you. In particular, since it is soluble in hard water, it has the advantage that it is possible to use a water-soluble cleaning agent as well as ease of maintenance that the container and the conveyor plate can be easily rinsed and cleaned with water.

  Furthermore, the lubricating performance of the lubricant composition of the present invention has the advantage that it is good regardless of the type of container and the material of the plate of the conveyor.

  Next, the best mode for carrying out the present invention will be described in detail.

  The lubricant composition for a transport conveyor of the present invention is a transport conveyor for containers such as bottles, cans, PET bottles, and paper packs that are filled with foods and drinks such as milk, beer, liquor, soft drinks, medicines, cosmetics, etc. It can be used as a lubricant.

The lubricant composition for conveyors of the present invention includes the following (A) to (D):
A: at least one of an alkyl polyoxyalkylene glycol type nonionic surfactant, a polyethylene glycol type nonionic surfactant, and a polyoxyethylene / methylpolysiloxane copolymer type nonionic surfactant;
B: at least one of polyoxyethylene alkyl ether acetic acid, polyoxyethylene alkenyl ether acetic acid and salts thereof, and acylamino acid type anionic surfactant;
C: at least one of aliphatic alkylamines and salts thereof;
D: at least one of an alkylaminocarboxylic acid type amphoteric surfactant and a glycine type amphoteric surfactant;
It contains at least one selected from the group consisting of: a high boiling point solvent, and water.

  Examples of the component (A) alkyl polyoxyalkylene glycol type nonionic surfactant used in the lubricant composition of the present invention include polyoxyethylene (8) lauryl ether (HLB12.1: Emulgen 108 manufactured by Kao Corporation), poly Oxyethylene (8) cetyl ether (HLB 11.9: NOION P-208 manufactured by NOF Corporation), polyoxyethylene (8.5) tridecyl ether (HLB13: Nonion T-208.5 manufactured by NOF Corporation), polyoxy Ethylene (12) oleyl ether (HLB13.3: Nonion E-212 manufactured by NOF Corporation), polyoxyethylene (5) polyoxypropylene (9) lauryl ether (Pepol A-0638 manufactured by Toho Chemical Co., Ltd.), polyoxyethylene ( 4) Monolaurate (HLB13.1: Nonion L-4 manufactured by NOF Corporation) , Polyoxyethylene (6) monolaurate (HLB13.5: Nippon Oil & Fats Nonion O-6), polyoxyethylene (20) sorbitan monolaurate (HLB16.7: Lion's Rheodor Super TW-L120) , Polyoxyethylene (20) sorbitan monostearate (HLB14.9: Leodole Super TW-S120 manufactured by Lion Corporation), polyoxyethylene (6) sorbitan monooleate (HLB10: Emazol O-105R manufactured by Kao Corporation), etc. Can be mentioned.

  As the polyethylene glycol type nonionic surfactant of component (A) used in the lubricant composition of the present invention, polyoxyethylene (5) polyoxypropylene glycol (30) (HLB5.8: New Paul PE manufactured by Sanyo Kasei) -61), polyoxyethylene (10) polyoxypropylene glycol (30) (HLB6.2: Sanyo Kasei New Pole PE-62), and the like, and polyoxyethylene / methylpolysiloxane copolymer type nonionic surface activity Examples of the agent include polyoxyethylene / methylpolysiloxane copolymer (HLB9: EMALEX SS-5602 manufactured by Nippon Emulsion Co., Ltd.). The blending amount of the component (A) in the lubricant composition is preferably 0.1 to 50% by mass, and more preferably 0.1 to 15% by mass.

Polyoxyethylene alkyl ether acetic acid and / or polyoxyethylene alkenyl ether acetic acid (B) component used in the lubricant composition and salts thereof include polyoxyethylene (3) sodium lauryl ether acetate (Sanyo Kasei View Light LCA), polyoxyethylene (9) oleyl ether acetic acid (Acupo RO90VG manufactured by Kao Corporation) and the like.
Examples of the acylamino acid type anionic surfactant include those represented by the following general formula (1).
R—CO—NCH ₂ —CH ₂ CH ₂ COOM (1)
(R is an alkyl group or alkenyl group having 3 to 20 carbon atoms, M is H and an alkali metal, amine or alkanolamine)
Examples of the acylamino acid type anionic surfactant include a commercially available 27% solution of potassium N-lauroyl-N-methyl-β-alanine (product name: Alanon ALK / manufactured by Kawaken Fine Chemicals), N-myristoyl-N-methyl-β. -Alanine (product name: Alanon AMA / manufactured by Kawaken Fine Chemical Co., Ltd.) or the like can be used. The blending amount of the component (B) in the lubricant composition is preferably 0.1 to 50% by mass, and more preferably 0.1 to 15% by mass.

  Examples of the aliphatic alkylamines as component (C) used in the present lubricant composition include coconut propylene diamine (Duomine CD manufactured by Lion), oleyl propylene diamine (Nissan Amine DOB-R manufactured by NOF Corporation), polyoxy Ethylene (2) dodecylamine (Nymeen L-202 manufactured by Nippon Oil & Fats Co., Ltd.), polyoxyethylene (10) oleylamine (Nymeen O-210 manufactured by Nippon Oil & Fats Co., Ltd.), polyoxyethylene (1) octylamine (Nymeen C- manufactured by Nippon Oil & Fats Co., Ltd. 201), etc., and the salts thereof include acetic acid, adipic acid, hydrochloric acid, glycolic acid, lactic acid, citric acid, etc. The blending amount of component (C) in the lubricant composition is 0.1-50. % By mass is preferable, and 0.1 to 15% by mass is more preferable.

Examples of the alkylaminocarboxylic amphoteric surfactant as the component (D) used in the present lubricant composition include those represented by the following general formula (2).
_{R-NH- (CH 2) nCOOM} (2)
(R is an alkyl or alkenyl group having 3 to 20 carbon atoms, n is 1 to 2, M is H and an alkali metal, amine or alkanolamine)
Examples of the alkylaminocarboxylic amphoteric surfactant include n-lauroyl-β-alanine (manufactured by Kawaken Fine Chemical Co., Ltd.), sodium dodecylaminopropionate 20% solution (product name: Levon APL / manufactured by Sanyo Chemical Industries Ltd.) Examples include alkylaminopropionic acid sodium salt 20% solution (product name: Lipomin LA / Lion Corporation).
Examples of the glycine-type amphoteric surfactant include those represented by the following general formula (3) or (4).
_{R- (NHCH 2 CH 2) 2} NHCH 2 COOM (3)
Or
_{(R-NHCH 2 CH 2)} 2 NCH 2 COOM (4)
(R is a C3-C20 alkyl group or alkenyl group, M is H and an alkali metal, amine or alkanolamine)
As the glycine type amphoteric surfactant, sodium lauryl diaminoethylglycine 30% solution (product name: Levon S / manufactured by Sanyo Chemical Industries), alkyl polyaminoethylglycine hydrochloride 50% solution (product name: Levon U / Sanyo Chemical Industries) Etc.). The blending amount of the component (D) in the lubricant composition is preferably 0.1 to 50% by mass, and more preferably 0.1 to 15% by mass.

  Examples of the high boiling point solvent used in the lubricant composition include polyhydric alcohols (glycerin, diglycerin, polyglycerin), glycol polyhydric alcohols (propylene glycol, dipropylene glycol, tripropylene glycol, propylene glycol monomethyl ether, Examples include xylene glycol, isoprene glycol, ethylene glycol, diethylene glycol, triethylene glycol, polypropylene glycol, ethylene glycol monobutyl ether, ethylene glycol monophenyl ether, polyethylene glycol, 1,3 butylene glycol, and 1,4 butylene glycol. The blending amount of the high boiling point solvent in the composition is preferably 10 to 98% by mass, more preferably 20 to 60% by mass. Properly it is 120 ° C. or higher, more preferably 180 ° C. or higher.

  Examples of water used in the lubricant composition include pure water, ion exchange water, soft water, distilled water, and tap water. These may be used alone or in combination of two or more. Of these, tap water and ion-exchanged water are preferably used from the viewpoint of economy and storage stability. “Water” is the sum of water contained in the form of crystal water or aqueous solution derived from each component constituting the composition and water added from the outside, and the entire lubricant composition is 100%. In the present lubricant composition, it is set to a range of 80% by mass or less, preferably 70% by mass or less, and more preferably 5 to 50% by mass. If it exceeds 50% by mass, the rot caused by bacteria tends to occur.

  Furthermore, in the lubricant composition for conveyors of the present invention, acetic acid, formic acid, glycolic acid, lactic acid, as a solubilizing agent, a viscosity adjusting agent, a stabilizer such as alcohol, a pH value adjusting agent, if necessary. Organic or inorganic acids such as mono- or dicarboxylic acids having 2 to 8 carbon atoms, dicarboxylic acids having 10 carbon atoms, antibacterial agents such as antibacterial agents and cationic surfactants, cleaning aids such as nonionic surfactants, A crazing inhibitor such as glycerin, alkyl diphenyl ether, rosin ethoxylate, and the like can be optionally contained.

  Hereinafter, the features and advantages of the present invention will be described in more detail with reference to Examples and Comparative Examples.

Each of the following components (A) alkyl polyoxyalkylene glycol type nonionic surfactant, polyethylene glycol type nonionic surfactant, and polyoxyethylene / methylpolysiloxane copolymer type nonionic surfactant (B) polyoxyethylene alkyl Ether acetic acid and / or polyoxyethylene alkenyl ether acetic acid and salts thereof, acylamino acid type anionic surfactant (C) aliphatic alkylamines and salts thereof (D) alkylaminocarboxylic acid type amphoteric surfactant, glycine type amphoteric Surfactant (E) high boiling point solvent; and (F) Examples A-1 to 14, Tables B-1 to 3, C-1 to 3, D-1 to Tables 1 and 2 shown in Tables 1 and 2 2 and the composition of Comparative Examples 1 to 3 shown in Table 3 (the unit of numerical values in each table is% by mass) were prepared, and the lubricity test was performed. , Washing test, 耐硬 aqueous test were evaluated and tested for four items stress crack test. Each component in the table is shown as a mass (mass%) as it is. The results of various tests are also shown in Tables 1 to 3 below. The test methods and evaluation criteria for each test item are as shown below. The compositions of Comparative Examples 1 to 3 are conventional conveyor lubricant compositions that are used after being diluted with water.

[Lubricity test]
A test PET container is placed on a conveyor plate made of polyacetal resin, and then the coefficient of friction (μ) after 10 minutes when each test composition is supplied on the conveyor plate under the following supply conditions is measured. The lubricity of the test composition was determined according to the following evaluation criteria. The operating speed of the conveyor was 40 cm / second, and the test PET containers were 500 mL capacity × 2 (total weight 1070 g). The coefficient of friction (μ) was calculated from the following formula.
Coefficient of friction (μ) = Tension resistance value by spring scale (g) / weight of test PET container (g)
[Supply method]
(1) About Example goods, a composition is not diluted but it supplies continuously in the ratio of 0.1 g / 10min.
(2) For comparative examples it is continuously fed those composition was diluted 400-fold with tap water (70 mg / L as total hardness CaCO ₃₎ at a rate of 25 ml / min. When the composition is not diluted (stock solution) and is used for the test, it is continuously supplied at a rate of 0.1 g / 10 min.
〔Evaluation criteria〕
A: Friction coefficient (μ) is less than 0.08 (very slippery and excellent in lubricity)
B: Friction coefficient (μ) is 0.08 to 0.1 (within lubrication, no problem)
C: Friction coefficient (μ) exceeds 0.1 (does not slide: poor lubricity)

[Detergency test]
The adhesion state of darkening on the conveyor surface after completion of the lubricity test was visually observed and judged according to the following evaluation criteria.
〔Evaluation criteria〕
A: Adherence of dirt is not recognized B: Adherence of dirt is recognized slightly C: Adherence of dirt is recognized

[Water (hard water) dilution stability test method]
Using hard water to which calcium carbonate was added and mixed to a concentration of 100 mg / L, 200 mL of each solution obtained by diluting each test composition to 25 mg / L was allowed to stand at room temperature for 1 hour, and the appearance ( The state of turbidity and occurrence of precipitates was visually observed and judged according to the following evaluation criteria.
〔Evaluation criteria〕
A: Transparent and not cloudy, no precipitation of precipitates B: Slightly turbid and / or slight precipitation is observed C: Turbidity occurs and / or precipitation of precipitates is observed

[Stress crack test]
A 500 ml petaloid PET container is filled with carbonated water, adjusted to a pressure of 4.0 to 4.5 gas Vol (a carbon dioxide pressure of 4.0 to 4.5 times the volume of the container), and a test PET container and did. Next, each test composition is prepared under the following adjustment conditions, immersed in 1 g per test PET container, and left for 10 days under conditions of 40 ° C. and 80% humidity. In the meantime, it was confirmed whether there was a bottom crack in the container, and the occurrence of cracks after 10 days was visually observed and judged according to the following evaluation criteria.
[Adjustment conditions]
(1) For the examples, the composition was used without diluting (2) For the comparative examples, the composition was diluted 400 times with tap water (total hardness CaCO ₃ as 70 mg / L) and When the composition is used without dilution [Evaluation criteria]
A: Less cracking and no bottom cracking B: Cracking but no bottom cracking (within range of use)
C: Bottom crack

From the results of Tables 1 to 3, the lubricant compositions for conveyors of Examples A-1 to 14, B-1 to 3, C-1 to 3, and D-1 to 2 are all lubricity and detergency. It can be seen that the water (hard water) dilution stability and the stress crack test all have excellent performance.

Claims (6)

It is the lubricant composition for container conveyance conveyors used in order to supply to the surface and / or back surface of a conveyor plate without diluting with water, Comprising: (A)-(D) below
A: at least one of an alkyl polyoxyalkylene glycol type nonionic surfactant, a polyethylene glycol type nonionic surfactant, and a polyoxyethylene / methylpolysiloxane copolymer type nonionic surfactant;
B: at least one of polyoxyethylene alkyl ether acetic acid, polyoxyethylene alkenyl ether acetic acid and salts thereof, and acylamino acid type anionic surfactant;
C: at least one of aliphatic alkylamines and salts thereof;
D: at least one of an alkylaminocarboxylic acid type amphoteric surfactant and a glycine type amphoteric surfactant;
A lubricant composition for conveyors, comprising at least one selected from the group consisting of: a high-boiling solvent, and water. Content of (A)-(D) component in the said lubricant composition for conveyors is 0.1-50 mass%, The lubricant composition for conveyors of Claim 1 characterized by the above-mentioned. The conveyor lubricant composition according to claim 1 or 2, wherein the content of the high-boiling solvent in the lubricant composition for conveyor is 10 to 98% by mass. The water content in the said lubricant composition for conveyors is 80 mass% or less, The lubricant composition for conveyors of any one of Claims 1-3 characterized by the above-mentioned. For applying or spraying the lubricant composition for conveyor to continuously or intermittently supply the lubricant composition to the surface and / or back surface of the conveyor plate at a rate of 1.0 × 10 ⁻⁶ to 1.0 g / cm ² . The lubricant composition for conveyors of any one of Claims 1-4. The lubricant composition for conveyors according to any one of claims 1 to 4 is continuously or intermittently provided on the front surface and / or back surface of the conveyor plate at a rate of 1.0 x 10 ^-6 to 1.0 g / cm ^2. A method of lubricating a conveyor, characterized in that it is applied or sprayed in order to supply it.