RU2245285C2 - Film mixing container for in-situ foamed plastic producing - Google Patents

Abstract

FIELD: containers, packaging elements, or packages adapted to be used for non-packaging purposes, particularly for packaging two or more different materials which must be maintained separate prior to use in admixture.

SUBSTANCE: container consists of at least two film chambers connected by frangible partition and containing reactive components to form foamed plastic after manual mixing thereof. One chamber includes the second partition, which forms orifice for discharging the resultant foamed material in place of its use after partition damage. At least one chamber has profile and filling rate in working position of substantially rectangular shape with height selected from the following correlation: δ=(1/5ч1/30)·h, h=50 - 180 mm. Here δ is rectangular profile height of chamber filled with component, mm, h is rectangular profile width of chamber filled with component, mm. The second frangible partition may be made as diaphragm and may be unsealed from the outside.

EFFECT: improved safety, possibility to mix components regardless of their viscosity.

8 cl, 5 dwg

Description

FIELD OF TECHNOLOGY

The invention relates to the construction of a film container-mixer for the production of foam at the place of use, which consists of several sealed film chambers connected through a brittle partition and containing reaction components for the formation of foam during manual mixing. At the same time, one of the chambers has a second brittle partition, which, when it is destroyed, forms an opening for the release of the mobile foam mass obtained in the combined chambers to the place of its direct consumption. Such places of consumption can be packaging containers for fragile products, construction joints, pressurized water inflows in mine workings, formwork for manufacturing various forms, etc.

For packaging purposes, elastic or semi-rigid foams obtained from their bicomponent polyurethane system are typically used. Rigid polyurethanes and phenol-formaldehyde foams, also made from two-component systems, are used for construction and emergency purposes.

Known methods for producing filling foams directly at the place of application require mixing of the reaction components in high-speed mechanical mixers, which limits the area of use of foams. Known methods for producing foam at the place of use through single-component systems complicate and increase the cost of the use of foams, because require expensive packaging (cartridges) under pressure (foaming is carried out by low-boiling liquids). In addition, the well-known one-component systems do not allow the production of closed-cell foam with high sealing and thermal insulation properties.

In recent years, it is no coincidence that patent publications and market two-component systems have appeared that are capable of forming a mobile foam mass even with simple manual mixing of the reaction components. This greatly simplified and cheapened the packaging process of expensive products - instruments, equipment, crystal products, etc. However, due to the lack of the necessary assortment of two-component foam systems capable of forming qualified foam mass by manual (without mechanical high-speed devices) mixing of the components under normal conditions, the field of application of this advanced technology is limited to packaging, the requirements of which for the produced foam mass are quite low. To expand the areas of “manual filling technology”, it is necessary to create conditions for the use in this technology of two-component systems of qualified foam materials such as polyurethane foams and phenol-formaldehyde foams existing on the market. Development of a special film container-mixer is required, which would allow the manual mixing of reaction components for existing systems on the market. The implementation of this task will allow to obtain foam material of the widest range of properties directly at the places of consumption using the “manual pouring” technology available to a wide consumer.

BACKGROUND

Several principal designs of a film mixer container are known, which consists of several sealed film chambers interconnected through a brittle partition and containing reaction components for the formation of foam during manual mixing. Moreover, one of the chambers has a second brittle partition, which, collapsing under the action of the pressure of the resulting foam mass, releases it outside the combined chambers (mixer) into a film bag (US Patent Nos. 5699902, 5996782, 5873221 and 5899325).

A common drawback of these designs of the film container-mixer is that it can work only on low-viscosity, non-toxic, environmentally friendly components, which are also activated by additional heat immediately before mixing the components. This limits the use of well-known mixer containers to the packaging area, which does not impose any high requirements on the resulting foam material, limiting itself to the task of low bulk density and some elasticity. Another serious drawback of the known constructions of the film container-mixer is the presence of at least two brittle joints in them, which must be destroyed from the inside strictly sequentially. An accidental violation of this order is fraught with environmental hazard and premature withdrawal of the mixer from working condition. This predetermines the use of known constructions of the hand mixer only inside the shielded mixer of the packaging bag, for the formation of the packaging pillow.

The film container mixer according to the invention of Mr. Bertram has some developmental design (US patent No. 5899325). According to this patent, a film mixer, placed in a packaging film bag, consists of at least 2 sealed film chambers connected through a brittle partition (allowing one camera to be laid on another) and containing reaction components for the formation of foam during manual mixing; in this case, one of the chambers has a second brittle partition, which, when it is destroyed (under the influence of the pressure of the resulting foam mass), forms an opening for discharging the resulting foam mass to the place of consumption (in this case, into a film bag).

However, the invention of Mr. Bertram is inherent in all of the above disadvantages of the known constructions of a manual film mixer, although it goes forward with respect to the reliability of separation of chambers with reaction components during storage and transportation of the container.

SUMMARY OF THE INVENTION

The objective of the invention is to provide a construction of a film container-mixer, free of the indicated drawbacks of the known structures, having enhanced capabilities for processing (mixing) of reaction liquid components regardless of their viscosity, and also having increased safety in handling such a mixer and, accordingly, wide areas of use .

According to the invention, a film container-mixer for producing foam at the place of use consists of at least 2 sealed film chambers that are connected through a brittle partition and contain reaction components for the formation of foam during their manual (without using high-speed mechanical mixers) mixing. Moreover, one of the chambers has a second brittle partition, which, when it is destroyed, forms an opening for the release of the foam obtained in the combined chambers to the place of consumption.

According to the invention, the claimed design of the film container-mixer differs from the known structures in that the shape of the profiles of the chambers of at least one of them, in the working state filled with components and the filling of the chambers with the components are close to a rectangular profile, the heights of which are selected from the ratio:

δ = (1/5 ÷ 1/30) · h at h = 50-180 mm,

where δ is the height of the rectangular profile of the chambers in the working condition filled with the component, mm;

h is the width of the rectangular profile of the chambers in the working condition filled with the component, mm,

and the second brittle partition is made in the form of an externally pressurized device, preferably in the form of a membrane (in contrast to the second fragile partition of the known containers being destroyed by pressure of the expandable mass being foamed inside).

Since, thanks to the principle construction found according to the invention, it receives practically unlimited possibilities of application in various branches of technology, it is advisable to provide the claimed design with additional elements:

a) the hole formed by an external depressurized device, for example, a membrane, is connected to a channel (as a special option - made in the form of a hose, pipe) for supplying foam to the place of use;

b) the chamber in which the depressurized device is located has a narrowing along the width of the rectangular profile in the direction of the location of the membrane to facilitate the exit of the formed foam mass;

c) at the location of the depressurized device has a device attached to this chamber (for example, a ring with a thread or cone) for connecting it to a removable pipe (hose) that forms a channel for supplying foam mass to the place of consumption;

d) to increase the environmental safety of the film container-mixer, the chamber with the component having environmental hazard (chamber “B”) is protected from external destructive effects by the chamber with the component that is environmentally safe (chamber “A”), and chamber “B” has a size in a filled state less than chamber “A” by an amount sufficient for complete external protection;

e) as the most reliable option for environmental protection of chamber “B”, it is placed inside the chamber “A” in such a way that chamber “B” is completely washed by component “A”, and the size of chamber “A” is equal to or greater than the total volume of components “A” ”And“ B ”;

f) for the industrial implementation of environmental protection of chamber “B”, the preferred option is to wrap chamber “B” with camera “A” and establish the length of chamber “B” (in the direction of folding), selected from the ratio:

g) or dividing the chamber “A” into two identical parts, each of which lies on a common axis with the camera “B” and is connected to the camera “B” by a brittle partition that has a width sufficient to add the parts of the camera “A” to the camera “ B ".

LIST OF DRAWINGS FIGURES

Figure 1 shows the basic construction of the film container-mixer, made according to the invention. In this case, the flat cameras “A” and “B” are the same.

Figure 2 shows the design of the film container-mixer, made according to one of the preferred options. In this case, one of the chambers (item 3) has a narrowing along the width of the rectangular profile in the direction of the location of the membrane (item 4).

Figure 3 shows the design of the film container-mixer, made according to one of the preferred embodiments of the invention. In this case, chamber “B” is placed inside the chamber “A” and is washed by component “A”. In pos. “A” - camera “B” is attached to camera “A”. In pos. “B” - camera “B” has the ability to move freely inside camera “A”.

Figure 4 shows the design of the claimed film container-mixer, which provides for the external protection of the camera “B” (item 1) by wrapping it with camera “A” (item “b”).

In pos. figure 4 “a” shows the camera “A” and “B” in the operating position. In pos. figure 4 “b” - the position of the chambers “A” and “B” at the moments of storage and transportation of the claimed film container-mixer.

Figure 5 shows some of the practical environmental protection schemes for container “B” using container “A”.

1 - camera “B”

2 - fragile partition

3 - camera “A”

4 - externally destroyed membrane

5 - a ring (for connection with a branch pipe)

6 - channel for the release of foam to the place of consumption

INFORMATION CONFIRMING THE POSSIBILITY OF CARRYING OUT THE INVENTION.

The claimed invention - the design of the film container-mixer can be manufactured on an experimental scale without additional research, since the market has all the necessary starting materials, their application technology and raw liquid components for the manufacture of so-called injection reaction systems such as polyurethane foams and phenol-formaldehyde foams.

The basic requirements for starting materials and reaction components for the experimental use of the invention are in principle the following:

1. The material for the manufacture of a film container-mixer and an externally destructible membrane must be sufficiently flexible and strong in order to allow manual mixing of the reaction components for several seconds (for low-viscosity components of the foam system with a very high start - the start of foaming) to several minutes (for highly viscous components of the foam system with a low start - the start of foaming). Manual mixing of the reaction components in the film container-mixer is carried out by destroying the brittle septum separating chamber “A” from chamber “B” (destruction is done by manually pressing one of the chambers) and pulsating deformation of the filled chambers “A” and “B”, which is designed to distill components “A” and “B” towards each other in a fairly thin layer “b” (figure 1).

In addition, the material of the film container-mixer must be inert (chemically resistant) with respect to the substances included in the reaction components “A” and “B”, and also must not pass pairs of these substances, be vapor-proof for them throughout the entire storage period film container mixer.

In addition, the material of the film container-mixer, at least one of the external coatings must be able to weld and / or stick together in order to be able to form a fragile partition between chambers “A” and “B” and attach to one of the chambers destroyed from the outside the membrane. Therefore, the materials of the film container-mixer, it is advisable to choose from multilayer metallized films. For instance:

- the outer layer is made of polymer polyethylene or polyethylene terephthalate film with a thickness of about 20-50 microns,

- the middle layer is a metal (aluminum) foil with a thickness of about 10-20 microns,

- the inner layer is made of a polymer chemically resistant film, for example, polyethylene or polytetrafluoroethylene.

2. The height (thickness) of the film container-mixer (figure 1, “b”) is selected based on the specified range and the viscosity characteristics of the reaction components as a general rule: the higher the viscosity and lower compatibility, the lower the height “b”. Detailed dimensions are selected based on the required container capacity and the start time of the reaction system.

3. The reaction components for the formation of foam should be liquid and have the ability to form a reaction system with manual mixing and then the mobile foam. The latter should have a sufficiently acceptable curing time (up to 5-10 min) in order to fill a free space at the place of consumption and cure under normal conditions without emitting toxic substances. Such requirements are met today, for example, by two-component systems of filling polyurethane foams (component “A” is polyester with necessary additives, component “B” is an isocyanate-containing product) and filling phenol-formaldehyde foams (component “A” is phenolic resin, component “B” is hardener) .

The inventive design of the film container-mixer, in principle, consists of at least 2 film chambers (Figs. 1-5, 1 and 3), separating these chambers of a brittle partition (2) and destroyed from the outside (by external pressure) of the membrane (4 ) The membrane serves to form an opening that allows the release of mobile (uncured) foam mass to the place of consumption, for example, through a channel (6, FIG. 2). The reaction components “A” and “B” are placed (sealed) in the chambers (1 and 3) to produce foam with manual mixing.

The actuation and operation of the film container is reduced to the following:

- after deployment of the container-mixer from the position that it has at the moments of storage and transportation (Fig. 4 “b”, Fig. 5, “a” and “b”) in the preferred embodiment, in the working position (Fig. 1 and Fig. .2) it is laid on a horizontal flat surface. Then, by pressing with hands or a roller on one of the chambers, the brittle partition (2) is destroyed and manually, alternately, crush, distill the components towards each other until the reaction mass foams. At this moment, the membrane (4) is destroyed - by piercing, pressing, etc. and direct the flow of the resulting foam to its place of consumption.

Claims (8)

1. A film container mixer for producing foam at the place of use, consisting of at least two sealed film chambers connected through a brittle partition and containing reaction components for the formation of foam during manual mixing, while one of the chambers has a second brittle partition forming its destruction, the hole for the release obtained in the combined chambers of the foam to the place of consumption, characterized in that - the shape of the profiles of the chambers, at least one of them, in a working condition filled with components and the filling of the chambers with components are close to a rectangular profile, the heights of which are selected from the ratio δ = (1/5 ÷ 1/30) · h for h = 50-180 mm where δ is the height of the rectangular profile of the chambers in the working condition filled with the component, mm; h is the width of the rectangular profile of the chambers in the working condition filled with the component, mm. - the second fragile partition is made in the form of an external pressurized device. 2. The film container according to claim 1, characterized in that - the depressurizable device is made in the form of a membrane and the hole formed by the externally destroyed membrane is connected to the channel for supplying foam mass to the place of use. 3. The film container mixer according to any one of claims 1, 2, characterized in that - the chamber in which the membrane is located has a narrowing along the width of the rectangular profile in the direction of the location of the membrane. 4. Film container mixer according to any one of claims 1 to 3, characterized in that - the camera at the location of the membrane has a device attached to it - a ring with a thread or a cone, for connecting it with a removable pipe forming a channel for supplying foam to the place of consumption. 5. Film container mixer according to any one of claims 1 to 4, characterized in that - a chamber with an environmentally hazardous component - chamber "B" is protected from external destructive effects by a chamber with a component that is environmentally friendly - chamber "A" and chamber "B" has a filled size smaller than chamber "A" "by an amount sufficient for complete external protection. 6. The film container mixer according to any one of claims 1 to 5, characterized in that - the chamber "B" is placed inside the chamber "A" and washed by the component "A", and the size of the chamber "A" is equal to or greater than the total volume of the components "A" and "B". 7. Film container mixer according to any one of claims 1 to 5, characterized in that - the camera "B" is wrapped by the camera "A" and has a length in the direction of folding, selected from the ratio:

- the length of the camera "B", and the width of the chamber — in the direction perpendicular to folding, is equal to or greater than the width of chamber “B”. 8. The film container mixer according to any one of claims 1 to 5, characterized in that - the camera "A" is divided into two identical parts, each of which lies on a common axis with the camera "B" and is connected to the camera "B" by a fragile partition that has a width sufficient to add the parts of the camera "A" to the camera "B" .

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