JP2008022791A - Mold release oil - Google Patents

Abstract

The present invention relates to a release oil that is used by spraying on iron plates and containers in the food field, which has excellent release properties, can be continuously operated without nozzle clogging in pre-machine spraying, generates little mist, and is free from dripping after spraying. Do not provide release oil.
A water-in-oil emulsion comprising 40 to 94.5 parts by weight of a liquid oil and fat component, 0.5 to 20 parts by weight of an animal and plant wax component and 5 to 40 parts by weight of water, wherein the wax is added to the animal and plant wax component. A release oil containing 15% by mass or more and having a viscosity at 20 ° C. of 200 to 8000 mPa · s.
[Selection figure] None

Description

  The present invention relates to a release oil. More particularly, the present invention relates to a release oil used by spraying on iron plates and containers in the food field.

2. Description of the Related Art Conventionally, in the food field, when baking bread or confectionery, mold release oil is applied to improve the mold release so that dough does not adhere to an iron plate or a container.
The release oil is roughly classified into a solid release oil and a liquid release oil. When the solid release oil is applied to the top plate or baking mold, it needs to be hand-painted with a brush or mop. Industrially, liquid release oil that can be sprayed using a spray machine is widely used.

However, in general, liquid mold release oil is inferior to mold release oil in comparison with solid mold release oil, so emulsifiers, starch, animal and vegetable waxes, etc. are added to liquid oils and fats to improve the mold release oil ( For example, Patent Documents 1 and 2).
However, even in the above-mentioned liquid release oil, there is a problem that the release oil is atomized and becomes mist and is scattered in the air to contaminate peripheral equipment. When sprayed, sufficient viscosity may not be obtained, and may not adhere to the top plate or baking mold.
Even when the mold release oil is sprayed uniformly on the mold, the mold release oil attached to the mold moves to the bottom when the mold has unevenness, and the oil film of the mold release oil does not become constant, so-called liquid dripping. Will occur. The part where the mold release oil on the surface of the mold becomes thinner due to liquid dripping, the releasability deteriorates, and the part where the mold release oil becomes thick becomes a surface condition as if fried with oil, and the appearance of the fired product is damaged. Occurs.

In order to solve the problem that the release oil becomes mist and scatters in the air, use of a water-in-oil emulsion as a form of the release oil has been proposed. When the water-in-oil emulsion is used, the viscosity of the release oil can be increased, but the emulsion is often not separated and the layers are separated, and precipitates and floats are often generated. Precipitates and the like are gradually accumulated in fine gaps in the pump and piping and spray nozzle in the spray machine, causing problems such as blocking the nozzle. Therefore, Patent Document 3 solves this problem by forming a stable water-in-oil emulsion using a polyglycerin-condensed resinolein ester and a sucrose ester as an emulsifier in a water-in-oil emulsion.
However, due to the recent health-conscious boom of consumers, foods that are made only from natural materials are desired, and even in mold release oils, synthetic emulsifiers such as polyglycerin-condensed resinolein esters and sucrose esters are used. Development of a release oil that does not need to be developed is desired.

JP-A-7-213228 Japanese Patent Application Laid-Open No. 2001-275566 JP 2004-222588 A

  An object of the present invention is to provide a release oil that uses only natural materials as a raw material, is excellent in releasability, can be continuously operated without clogging of nozzles in mechanical spraying, generates little mist, and does not drip after spraying. is there.

  The first invention in the present invention is a water-in-oil emulsion comprising 40 to 94.5 parts by mass of a liquid oil and fat component, 0.5 to 20 parts by mass of an animal and plant wax component and 5 to 40 parts by mass of water. It is a release oil containing 15% by mass or more of wax in the component and having a viscosity at 20 ° C. of 200 to 8000 mPa · s.

  According to the present invention, only a natural material is used as a raw material, it is excellent in releasability, can be continuously operated without clogging of nozzles in mechanical spraying, has little mist generation, and is a stable water-in-oil emulsion that does not sag after spraying. A release oil that is can be provided.

The present invention is a release oil comprising a liquid oil / fat component, an animal / plant wax component and water, wherein the animal / plant wax component contains wood wax, and the form is a water-in-oil emulsion. Oil and animal wax components containing wood wax are added to the liquid oil and fat component, and it is excellent in releasability without adding any other emulsifier component, less mist is generated, and does not sag after spraying. The present invention has been completed by finding that a water-in-water emulsion can be formed, is stable during storage, and does not cause precipitation or suspension.
The liquid fat component used in the present invention is a fat that is liquid at 20 ° C. In the liquid oil component, it is preferable to use an oil having a melting point of 5 ° C. or lower. Examples of the liquid fat used in the present invention include rapeseed oil, soybean oil, rice bran oil, sesame oil, olive oil, palm olein oil, cottonseed oil, sunflower oil, corn oil, liquid medium chain fatty acid triglycerides (hereinafter abbreviated as MCT oil). Sometimes). Rapeseed oil, soybean oil, corn oil, MCT oil and the like are preferable. If an oil having a melting point higher than that of liquid oil is used, crystals are likely to be generated, and clogging may occur at the spray nozzle during operation.

The animal and plant wax component used in the present invention is a wax component derived from animals and plants, and is characterized by containing 15% by mass or more of wood wax in the wax component.
Animal and vegetable wax components play a role as emulsion stabilizers in water-in-oil emulsions, but wax components generally tend to crystallize and cause precipitation. In the present invention, by using wood wax as the animal and plant wax component, the precipitation of the wax component can be suppressed, and a stable water-in-oil emulsion can be maintained.
Wood wax is also referred to as Japanese wax and is a wax component obtained from gooseberry. The melting point is 48-52 ° C. White wax obtained by deodorizing and purifying wood wax can also be used.
Wood wax is an animal or plant wax that can be finely dispersed in a liquid oil and fat, and can exist without growing large crystals in the liquid oil and fat. The present invention has found this property of wood wax and has completed the invention.
Examples of other animal and plant wax components used in combination with wood wax include animal and plant wax components such as candelilla wax, carnauba wax, rice wax, jojoba oil, beeswax, and whale wax. Of these, candelilla wax, carnauba wax, and rice wax are preferred.
In this invention, if it is a water-in-oil emulsion using the animal and plant wax component containing 15 mass% or more of wood wax components, the spray state at the time of a work can be kept favorable. If it is less than 15% by mass, clogging may occur at the spray nozzle during operation.
In the present invention, wood wax can be used alone as an animal and vegetable wax component, but the wood wax component alone may lack the long-term stability of a water-in-oil emulsion that is a release oil. From the stability of the water-in-oil emulsion that is a release oil, the ratio of the wood wax in the animal and plant wax component is preferably 15% by mass to 80% by mass.

In this invention, it is preferable that it is a release oil of the water-in-oil emulsion which consists of 40-94.5 mass parts of liquid fats and oils components, 0.5-20 mass parts of animal and vegetable wax components, and 5-40 mass of water.
If a liquid fat component is less than 40 mass parts, it will contain a lot of water, it will be inferior to mold release property, and it will become easy to produce liquid dripping. If the liquid fat component exceeds 94.5 parts by mass, the amount of water decreases and the viscosity of the release oil decreases, so that mist is likely to occur.
If the animal and plant wax component is less than 0.5 parts by mass, it becomes difficult to form a stable water-in-oil emulsion. Moreover, when it exceeds 20 mass parts, precipitation is easy to occur and there exists a possibility that clogging may generate | occur | produce with a spray nozzle. It is more preferable that 1 to 10 parts by mass of the animal and plant wax component is contained in the water-in-oil emulsion.
The proportion of animal and plant wax components other than the wood wax in the water-in-oil emulsion is preferably 10 parts by mass or less. If it exceeds 10 parts by mass, precipitation tends to occur and the spray nozzle tends to be clogged.
In the present invention, the ratio of the liquid oil / fat component to the animal / plant wax component is preferably 0.5 to 10 parts by mass of the animal / plant wax component to 100 parts by mass of the liquid oil / fat component. If the animal or vegetable wax component is less than 0.5 parts by mass, a stable water-in-oil emulsion may not be formed, and if it exceeds 10 parts by mass, precipitation may occur and clogging may occur at the spray nozzle.

As water which can be used by this invention, the water which can be used for normal foods, such as purified water, ion-exchange water, and distilled water, is mentioned.
The release oil of the present invention may be blended with other components as long as the effects of the present invention are not impaired. Examples of other components include emulsifiers, stabilizers, fragrances, colorants, preservatives, and antifungal agents.

The release oil of the present invention is a release oil whose form is a water-in-oil emulsion. When the form is a water-in-oil type, the releasability can be improved and liquid dripping can be sufficiently suppressed as compared with the use of an oil-in-water emulsion.
The average particle size of the water droplets in the oil-in-water emulsion is not particularly limited, but is usually about 0.1 μm to 100 μm, and more preferably about 1 μm to 50 μm from the viewpoint of emulsion stability.

As for the manufacturing method of the mold release oil of this invention, the following method is mentioned, for example.
An animal and vegetable wax component is dissolved in a liquid fat component, and water is added thereto for production. More specifically, a predetermined amount of oil and fat component and animal and vegetable wax component are weighed in a container, heated to 50 to 90 ° C. and dissolved by heating. Next, a predetermined amount of preheated water is added to the blended oil while stirring to obtain an oil-in-water emulsion, which is cooled to 20 ° C. or lower.
The water temperature is preferably 50 to 90 ° C. When water at a low temperature is added, the animal and plant wax components are precipitated and are not preferable because they cannot be sufficiently dispersed.
Examples of the agitator for producing the oil-in-water emulsion include a homomixer, a disper, a propeller agitator, and a high-pressure homogenizer.
In the present invention, the cooling is preferably rapid cooling. In this case, it is preferable to use a botator or other quenching machine. Rapid cooling is preferable because the particle size of the oil-in-water emulsion becomes finer and uniform. The cooling rate is preferably 10 ° C./min or more.
The release oil to be produced preferably has a viscosity in the range of 200 to 8000 mPa · s. In the range of 200 to 4000 mPa · s, the spray state is good, and in the range of 4000 to 8000 mPa · s, the occurrence of liquid dripping and mist is more easily suppressed. Overall, it is preferably in the range of 500 to 5000 mPa · s.

  The release oil of the present invention can be used for spray nozzle spraying in the food field. Examples of spray machine models include Asahi Sunac Co., Ltd. Peak Bear Hot, AP1224H, Anest Iwata Co., Ltd., airless spray device, multi-alpha and spray device combination, Wakabayashi Kogyo Co., Ltd., SG -2, TG-2 greaser spray, and the like.

Reference Examples 1-5
50 g of animal and plant waxes shown in Table 1 are added to 700 g of liquid fat (rapeseed white squeezed oil) and dissolved on an oil bath at 80 ° C. Next, the mixture was cooled to 15 ° C. with stirring at a cooling rate of 10 ° C./min using a quenching apparatus, and then left at 20 ° C. for 12 hours or more to obtain a water-in-oil emulsion. The obtained emulsion was checked for the presence or absence of crystal growth by observation with a polarizing microscope manufactured by Olympus Corporation.

A: There is no transmitted light, and there is no crystal refracted by polarized light.
○: There is a slight amount of transmitted light, and there are some crystals that are refracted by polarized light.
Δ: There is a little more transmitted light, and there are crystals that are refracted by polarized light.
X: Many transmitted light and many crystals refracted by polarized light exist.

  It can be seen that, unlike other animal and vegetable wax components, wood wax can be finely dispersed in the liquid fat component and can exist without growing large crystals in the liquid fat.

Examples 1-8 and Comparative Examples 1-11
Hereinafter, the present invention will be described in more detail based on examples.
Next, the test method and evaluation method used are shown.
<1. Viscosity classification test>
The viscosity at 20 ° C. was measured with a B-type viscometer.
A: 200 to 4000 mPa · s
B: 4000 to 8000 mPa · s
<2. State stability (emulsification state) test>
After preparing the release oil, the release oil was placed in a sample bottle and stored in a thermostatic bath at 30 ° C. for 3 days, and changes over time were evaluated in an oil-water separation state by visual observation. The evaluation is shown in the table as the following symbol.
A: There is no separation of oil and water, and the whole is uniform.
○: Uniform throughout, but slightly transparent phase on the liquid surface.
(Triangle | delta); It isolate | separates into two layers and oil-water separation is confirmed.
X: Cannot be emulsified and separated into two layers immediately after production.
<3. Crystal state observation>
After preparing the release oil, it was stored at 20 ° C. for 12 hours and observed at 50 to 400 times using a polarizing microscope. The evaluation is shown in the table as the following symbol.
A: There is no transmitted light, and there is no crystal refracted by polarized light.
◯: There is a slight amount of transmitted light, and there are some crystals that are refracted by polarized light.
Δ: There is a little more transmitted light, and there is a crystal that is refracted by polarized light.
X: Many transmitted light and many crystals refracted by polarized light exist.
<4. Spray state>
Using a pressurized spray (spraying system Japan Co., Ltd., spray cart II), the release oil of Examples and Comparative Examples was used as a test sample, and the air pressure was 5 kg / cm ² (490 KPa), Sprayed on.
A: Good spray state and spray state are maintained.
○: The spray state is good, but the spray state is slightly biased.
Δ: The spray state is uneven, but the nozzle is not clogged.
X: Nozzle, that is, spray failure.

<5. Liquid sag suppression>
The liquid dripping suppression property was confirmed by spraying about 5 g uniformly on a 12 cm × 11 cm × 25 cm 2cm mold with the above-mentioned pressure spraying machine, and then checking the presence or absence of liquid dripping on the wall surface.
The evaluation is shown in the table as the following symbol.
A: Good without dripping.
◯: Almost no dripping and good.
Δ: Slight dripping occurs.
X: Liquid dripping occurs, the oil film on the wall surface becomes thin, and release oil accumulates at the bottom.
<6. Mist suppression test>
The mist suppression test was performed by observing the degree of mist that was sprayed with the above-described pressurized sprayer and then the release oil atomized and floated in the air.
The evaluation is shown in the table as the following symbol.
◎; Almost no mist.
○: There is a slight mist.
Δ: There is mist.
X: There is much mist.

<7. Release properties>
In the mold release test, a certain amount of release oil (4 g) was applied to a baking bread mold (2 斤 type), and then the bread dough was baked, and then the state of removal from the mold was observed.
The evaluation is shown in the table as the following symbol.
(Double-circle); Mold release is very favorable.
○: Good mold release.
Δ: Slightly insufficient mold release
X: Demolding failure.
(Bread dough combination)
The dough manufacturing method was a medium seed method. Medium seeds are mixed with 70 parts by weight of strong powder and 42 parts by weight of water in which yeast is dispersed in advance, and kneaded with a mixer. After fermentation at 28 ° C. for 4 hours, 30 parts by weight of strong flour, 8 parts by weight of white sucrose, 1.83 parts by weight of sodium chloride and 25 parts by weight of water are mixed with a main dough and a medium seed dough using a mixer. After that, the floor time was taken for 20 minutes and the dough was divided. Thereafter, after 15 minutes of bench time, molding was performed, and proofing was performed at 38 ° C. and 85% humidity for about 35 minutes.
(Baking conditions)
After the proofing, the dough was filled in a 2cm mold and baked at about 210 ° C for about 35 minutes.

<8. Overall evaluation>
Based on the above evaluation results, comprehensive evaluation was performed using the following indices.
◎; Very good (Three or more ◎, others are ○)
○: Good (Evaluation is only ◎, ○, △, not including x)
X: Defect (including x in the evaluation items 1 to 5)
The following products were used as animal and plant waxes.
Wood wax: Trade name; Refined deodorized white wax, Celerica Noda Rice Wax Co., Ltd .: Trade name; Rice Wax F-1, Celerica Noda Carnauba Wax Co., Ltd .: trade name; 1. Celerica Noda Candelilla Wax Co., Ltd .: trade name; Candelilla Wax Co., Ltd. Celerica Noda Beeswax Co., Ltd .: trade name: Deodorized and refined beeswax high acid Co., Ltd. Celerica Noda Jojoba Wax Co., Ltd .: trade name; stock)

Emulsions were prepared with the composition of oils and fats, animal and plant waxes and water shown in Tables 2 to 4 as follows.
A predetermined amount of fat and oil and animal and plant wax are weighed in a container and heated to a temperature of 80 ° C. while stirring to completely dissolve the animal and plant wax. The preheated 80 degreeC water is added there gradually, and it preliminarily emulsifies for 20 minutes, keeping at 80 degreeC. Thereafter, the mixture was quenched and cooled to 15 ° C. to obtain a water-in-oil emulsion.
When the produced water-in-oil emulsion was dripped in water, it was not naturally dispersed but condensed in the upper part, so that the form was confirmed to be a water-in-oil emulsion.
Using this release oil, an evaluation test was performed according to the above evaluation method. The results are shown in Tables 1-3.

As shown in the examples of the present invention, the water-in-oil emulsion using the animal and plant wax containing wood wax as the animal and plant wax component is more than the water-in-oil emulsion using the animal and plant wax component comprising the other animal and plant waxes of the comparative example. It can be seen that they are excellent in emulsion stability, crystallization inhibition, spray state, dripping, mist inhibition, and releasability.
It can be seen that the release oil of the present invention is a release oil that is excellent in releasability, can be continuously operated without nozzle clogging in pre-mechanical spraying, generates little mist, and does not sag after spraying.

Examples 9 and 10
Example 9 release oil of Example 6 in which the wax component is 100% of the wax component and Example 10 release oil of Example 3 in which the wax component is 66.7% as Example 10 and stability at storage at 30 ° C. Was examined. The results are shown in Table 5.
Viscosity: Viscosity at 20 ° C. was measured with a B-type viscosity type.
<1. Stability>
A: There is no separation of oil and water.
○: There is a slight separation.
Δ: Oil-water separation is clearly confirmed.
<2. Spray state>
The spray state is a spray using a pressurized spray (spraying system Japan Co., Ltd., spray cart II), using the release oil of Examples and Comparative Examples as a test sample at an air pressure of 5 kg / cm ² (490 KPa). Went.
A: Good spray state and spray state are maintained.

  From the results of Table 5, the stability of any of the release oils of the present invention was good. When the wax component was made of wood wax and another wax (Example 10), it was found that the stability was better than when the wax component was wood wax alone (Example 9).

Claims (1)

  A water-in-oil emulsion comprising 40 to 94.5 parts by mass of a liquid oil and fat component, 0.5 to 20 parts by mass of an animal and plant wax component and 5 to 40 parts by mass of water, and 15% by mass or more of wood wax in the animal and plant wax component A release oil having a viscosity at 20 ° C. of 200 to 8000 mPa · s.