JPH024677A - Pumps and similar devices for supplying viscous and fluid substances - 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 a. Field of Industrial Application The present invention relates to pumps and similar devices for supplying viscous and fluid substances.

b. Prior art and problems solved by the invention The present invention has viscosity and fluidity. The present invention relates to a device for supplying a substance, and in particular to a hand-held pump. This kind of day-type pump is cream,
It is in increasing demand to supply a wide range of products such as lotions, mayonnaise, cheese, and more.

In recent years, such handheld pumps have rapidly become popular as toothpaste dispensing devices, and such pumps are replacing traditional toothpaste tubes among consumers.

Accordingly, toothpaste pumps are rapidly progressing in their development, and manufacturers are devising more convenient, simpler and less expensive devices.

The hand-held pumps for toothpaste and other substances described above are in fact not new to those skilled in the art in the sense that many have been developed before. - As mentioned above, such patented devices according to the prior art are classified under International Classification BO3B1) 104, B65D3.
7100 and GOLF IIloo, and in the U.S. Patent Office, subclass 383.3 of class 222.
85.386,401,207,209,212゜25
6. Classified as 259, 260, 340 and 341. Recently patented examples include U.S. Patent No. 4,43
No. 7,591, No. 4,51)゜068 and No. 4.5
There is No. 98,843.

Among the earliest examples, US Pat. No. 3,255,935 is representative.

One type of pump currently on the market includes certain basic parts including a feed port, a pump for flowing the substance, and an actuator for the piston, which typically extends through the piston.

Some pumps of this type are also equipped with valves for opening and closing the flow of material towards the supply port.

This type of pump is called a "piston-rod" pump. A representative patent of this type is US Pat. No. 4,437,591.

Another type of pump is called a "rodless" pump. That is, this type does not have a rod connected to the piston, and in terms of Rx, this piston is similar to U.S. Pat.
, 313, the negative pressure created by the flexible bellows head causes the piston to be raised toward the top of the pump while pushing the contents above the pump.

Previously developed technologies have designed the components in a variety of ways. Furthermore, future developments in this field may seek to eliminate some of the above-mentioned components, or else to enable pumps of this type to be used anyway for dispensing toothpaste and similar products. The parts will be used.

It has recently become apparent that whatever the design of current or future pump components, the materials from which they are constructed have certain drawbacks. Specifically, commonly used materials include polyethylene terephthalate (PET), polypropylene (PP), polyethylene (PE), and mixtures thereof. These plastics have many good properties for the types of applications mentioned above. For example, they are moldable, relatively strong and therefore easy to transport and handle, and are resistant to impacts 1W:i.

And of course, it is suitable for mass production.

However, certain pump components constructed from PP, PE, PET and other currently used materials have had deficiencies. For example, they were relatively inflexible and had high adsorption properties for scents.

Flexibility is very important for certain pump internal parts, particularly pistons and valves. While these require dimensional stability due to their durability, they also require a certain degree of flexibility in order to work efficiently. Parts of this type currently in use do not have adequate flexibility and in extreme cases can absorb product and swell beyond its dimensional tolerances. As a result, when this occurs, the pump stops functioning or deteriorates.

A significant drawback of current pond pump components has been the adsorption and/or percolation of aromas from products filled inside the pond, such as toothpaste or cheese. For clarity, osmosis is the process by which a gas or vapor passes directly through a substance. This mainly consists of the following three steps.

(1) First, the invading substance, ie, the aromatic oil used in toothpaste, is dissolved and adsorbed to the polymer of the above-mentioned parts or main body. (2) Next, diffuse within this polymer. (3
) Additionally, the surface of this polymer releases invasive substances into the atmosphere.

Now, in some toothpaste pumps, the toothpaste contains an oily fragrance, such as peppermint. These oils penetrate parts exposed to the atmosphere. That is, it passes through the piston of the pump, which is usually made of PE. This is how osmosis occurs. As a result, the oil flows out of the toothpaste. This causes the toothpaste to lose its desired aroma.

In toothpaste, the aroma of the paste or gel is an important factor in consumer selection. It has been found that the aroma absorption of current pump components increases with increasing temperature. Therefore, when pumps are shipped to warm locations, particularly in the tropics, the pump components absorb the fragrance to such an extent that the taste of the paste or gel can be completely lost. As a result, there was a risk that consumers' trust in the brand would be significantly reduced.

As a result, the brand image deteriorated and the brand lost popularity with consumers.

For those outside the field, this loss of fragrance can be easily avoided by creating different paste or gel compositions to suit the local climate, such as adding special fragrances suitable for the tropics. It may be thought that it can be resolved. However, this is not practical.

Means for solving the C0 problem Therefore, an important object of the present invention is to provide a material for a pump-like delivery device for toothpaste paste or gel. The above can be done. In particular, internal components such as valves and pistons can also be used to construct pumps that can also be used for food products. These are. The above materials possess two properties: high flexibility and low absorbency, which is required for the parts of fragrances that conventional materials use. The present invention can also be easily molded and the manufacturing process
It was something I would end up doing.

Have the desired level of stiffness required
In order to provide a detailed explanation of the present invention, the object of FIG. 1 is to provide a material that is not shaped. Figure 3 is from U.S. Patent No. 4,437.59□.

Yet another object of the invention is to provide an inexpensive, commercial scale rod type pump that can be mass produced. ! ! Our goal is to provide quality. Figure 6 shows a rodless type pump of U.S. Pat. No. 4,474,313. It is our intention that the following detailed description of the invention and the appended claims do not limit the scope of the invention. , t, it will be clearer by describing a single range. - Just an example. The present invention also includes other pumps and embodiments.
It can also be applied to feeding devices.

As explained above, the present invention provides supplies for food products, toothpaste, parts and gels There is no need to go into details about the device, especially its handy features and its operation.

Bottle for two-tight toothpaste paste and gel
These are described in the above-mentioned US patents and are intended to develop new substances for use with reference number Abu. Although it is associated with. As stated above, and as will become clear below, the actuator 9 pulls the rod 2 toward the top of existing and future ideas. The rod 2 can be used in all kinds of pumps to pull the piston 3. , :shii
,=Yo. Push out the paste from step 4. piston 3
has a sealing tab 16, which is flexible in practice.

Loss of fragrance first occurred in pumps such as US Pat. No. 4,437,591 through the piston 3 or sealing lip 16, which was previously constructed of PE or PP. As mentioned above, the "internal parts" made of such materials can be penetrated by aromatic oils, which can lead to the release of the essential flavor of the toothpaste (or the contents of the pond), thereby rendering the product unmarketable. Ta.

Figures 4 through 6 show a rodless type pump and correspond to the figures in U.S. Pat. No. 4,474,313. There is no need to repeat each component in detail.

These are related by reference numerals to the above-mentioned US patents. For present purposes, this patent describes a pump without a lifting rod and employing a flexible bellows B at the top. This bellows is pressed down toward the pump by pressing its 5' portion toward the pump body. Conversely, the force exerted on the bellows constituted by the flexible one-piece presses out the paste M from the mouth of the nozzle 7'. This is because the pump is filled with paste M from the top of the bellows through the inside of the pump to the top of the piston 2. The piston 2 is caused by the negative pressure generated when the snake [B is pushed and the paste M is pushed out from inside the pump.
rises.

In the case of the device of FIGS. 4-6, the loss of fragrance occurs through the piston, as in US Pat. No. 4,437,591, and also through the flexible bellows head B.

Although the present invention can be used to manufacture pistons, if desired, valves, actuator mechanisms, and other basic internal components, these will be referred to as "internal components" for purposes of definition. In addition, the head shown in the device of US Pat. No. 4,474,313, particularly the flexible bellows head, can be constructed of the material according to the invention. The head and the pump body as well as the top and bottom closure means are referred to below as "body parts".

After testing a number of elastomeric polymers, we found that a ternary copolymer based on ethylene, propylene, and diene, sold by Monsando under the trademark Santoprene, was found to be compatible with other elastomeric polymers or PP, We have come up with the idea that it exhibits superior flexibility and low aroma absorption compared to conventional m-quality materials such as PET and PE.

Ike's ternary copolymers of this type are believed to exhibit similar excellent properties to those sold under the Santoprene trademark. In addition, in products sold under the trademark Santoprene, the diene is butadiene, pentagene, or other diene.

A number of prior US patents describe the use of elastomeric polymers. U.S. Pat. No. 3,255,935 discloses an "elastic polymer" head 12a in FIG. However, no specific elastic polymer is disclosed, and the head is merely a deformable cover on the top of the pump to push against the piston rod. U.S. Patent No. 3,
No. 940.029 only vaguely mentions the use of an elastic polymer for column 4. Furthermore, it has not been specified at all which elastic polymer among the many classes of substances should be used.

Therefore, none of these patents suggests or describes the use of the ternary copolymers of the present invention.

Many known elastic polymers were tested before arriving at the present invention. Santoprene compositions exhibit excellent flexibility as well as low fragrance absorption as shown in the tests below. In addition, the composition exhibits the property of not swelling when contacted with fragrances compared to other elastomeric polymers. This is important for ensuring dimensional stability of internal parts, especially valves and pistons. Furthermore, the low loss of fragrance is a great advantage, both for the internal parts and for the body parts. In particular, U.S. Pat.
The loss of fragrance that would be expected if conventional materials were used in the bellows of a pump such as that shown in No. 13 is considerably reduced by the use of the material of the present invention.

In order to quantitatively demonstrate the advantages of the present invention as described above over conventional elastic polymers, several three-way tests were conducted as follows.

[Trial gX results]

The elastic polymer disc is made of the following elastic polymer materials:
! ! was created.

・Kraton G 2705 (T
P rubber)・Kraton (Kraton) G 270
6 (Soft rubber)・Monsanto Santoprene 201
-80・Dupont Hightrail ()lytrel) 4
056 (Polyester) ・Upjohn: z (Upjohn) 2103 (
Urethane) Ferro T P rubber FO
OOOO-100 The above discs were soaked for two weeks in a commercially available peppermint oil toothpaste fragrance to measure weight gain (which directly indicates the amount of fragrance absorbed) and swelling. The results are shown in Tables A and B below. Similar results would be expected for the major known oils used as fragrances.

As such, U.S. Pat. No. 4,528°18
Examples include peppermint oil, clove oil, and wintergreen oil as shown in No. 1.

Table A: Average weight increase rate (%) Table B: Average expansion rate (%) ■ Measured value at the beginning ■: Measured value at the end ■: Increase! ! (%) According to the above results, Santoprene is clearly much better compared to other elastic polymers judging from the weight increase. That is, Santoprene absorbs far less fragrance than other such materials.

Similarly, the swelling rate results show that Santoprene swells much less than the other materials tested. In particular, when the diameter and height are combined, the difference is remarkable.

Additionally, some of the other materials tested were clearly incompatible with this type of device.

Kraton G 2706 dissolved after 5 days.

Also, the Upjohn urethane (results not shown) swelled considerably even after 5 days. In fact, Santoprene's apparent weight has decreased slightly over time.

The results of another test using the same fragrance and measuring weight gain after one week are as follows.

Table C The results of the above tests show something surprising. That is, materials such as Santoprene-type ternary copolymers of ethylene, propylene, and dienes are significantly superior to the elastomeric polymeric materials of Pond. This will be well taken into account in body parts, especially bellows-type head members, as well as valves, pistons and other internal parts. This is because low fragrance absorbency, flexibility, and low swelling are important factors in these products.

e. Effects By using the materials according to the invention as described above, pumps for dispensing toothpaste pastes or gels and food products can be produced.

The invention allows such products to be preserved in all climates without loss of aroma and on the other hand has excellent flexibility,
It will have low expansion and all the characteristics necessary for such a pump.

[Brief explanation of the drawing]

1 is a perspective view of the upper end of a feeding device to which the present invention is applied; FIG.
Figure 3 is a perspective view showing the configuration of the rod and locking lever of U.S. Pat. No. 4,437,591; Figure 3 is a partially cut away longitudinal section of the entire feeding device of Figure 1 with the feeding mechanism in the rest position; 4 corresponds to FIG. 1 of U.S. Pat. No. 4,474,313, and FIG. 5 is a side view of a rodless type feeding device, and FIG.
3, and FIG. 6 corresponds to FIG. 3 of U.S. Pat. No. 4,474.313, and FIG. FIG. 3 is a longitudinal cross-sectional view of the supply device. (Regarding Figures 1 to 3) 2...Rod, 3...Piston 9...Actuator, 16...Sealing lip (4th
(Regarding figures or figures 6) B...bellows, 2'...piston 7'...nozzle, M...paste. Clear reading of drawings (no change in content) Leather, 1 drawing tail 5 drawing Qin 4 drawing tail 6 procedural amendment prevention 1, case indication 1983 patent application No. 283540 2, title of invention viscosity and fluidity Pumps and similar devices for supplying substances having No. 1 Shin-Otemachi Building 206 Ward 5, date of amendment order: March 7, 1491, 05 Prison Day)

Claims (9)

[Claims] (1) A device for dispensing aromatic products characterized by having at least one component made of a ternary copolymer of ethylene, propylene, and diene. (2) The device according to claim (1), wherein the device is a hand-held pump. (3) A device according to claim 2, characterized in that the device contains a toothpaste in paste or gel form and contains one or more component oils as a fragrance agent. (4) The device according to claim (1), comprising an internal component and a main body component, at least one of which is made of the ternary copolymer. (5) The device according to claim 1, wherein the ternary copolymer is santoprene. (6) providing a product containing an aromatic oil selected from the group consisting of peppermint, clove oil, wintergreen, spearmint, etc., comprising an external body part and an internal body part, and having one or more of the above-mentioned external or internal parts; A device characterized in that the component comprises a ternary copolymer of ethylene, propylene and diene. (7) The device according to claim (6), wherein the device is a pump. 8. The device of claim 6, wherein the pump contains toothpaste paste or toothpaste gel. (9) The device according to claim (6), wherein the pump contains food.