RU2245284C2 - Film container with capsulated components for in-situ producing cushion of foamed material - 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: film container includes film bag having vent holes for gas discharge and at least two film chambers arranged inside bag and divided by frangible partition. Film chambers are arranged so that they may be displaced for a short distance one relative another inside bag. Film chambers are filled with reactive components, which mix after frangible partition damage to form foaming material. Foaming material brakes another partition included in one chamber and fills free space of film bag through formed orifice. Chamber B filled with ecologically dangerous component, for instance isocyanate component of polyurethane foam, is protected against damage by chamber A filled with environmentally friendly component during container storage and transportation. As a result, chamber B can not be damaged without simultaneously damaging chamber A by outer force, wherein chamber A neutralize ecological implications casing by chamber B contents.

EFFECT: increased ecological safety.

4 cl, 5 dwg

Description

FIELD OF TECHNOLOGY

The invention relates to the construction of a film container, which consists of a film bag and sealed from each other sealed film chambers with reaction components, which, when manually mixed inside this film bag, expandable moving mass. The latter, during its foaming, fills the free space of the film bag, forming the so-called “Packing pillow”, the inner form of which repeats (in negative form) the shape of the product being packaged into it. The properties of the “packing pad” depend on the type of film used to make the film bag and the composition of the foam formed in this bag. For packaging purposes, a two-component system of elastic or semi-rigid polyurethane foam is usually used, in which component “A” is a polyester component with free hydroxyl groups containing the necessary additives to produce foam (catalysts, surfactants, etc.); as component “B”, a product containing free isocyanate groups (isocyanates, polyisocyanates, oligomers) is used. The technological requirement for such a system consists here in its ability to so-called. “Manual mixing” without the use of any mechanical high-speed mixers. Another requirement is the possibility of obtaining a low bulk density, a given strength and elasticity from such a foam system. Famous film containers are used for packaging purposes at the packaging site of fragile, breakable, accurate, and the like. products that require particularly mild storage and transportation conditions that protect them from external destructive (mechanical) effects.

BACKGROUND

There are several principal designs of a film container, which consists of a film bag and at least 2 sealed film chambers placed in it, containing reaction components for producing foam by manually mixing them in violation of the chamber tightness (US Pat. Nos. 5,699,902, 5,996,782, 5,873,221 and 5899325).

A common drawback of these film container designs is that the reaction components are encapsulated in essentially the same film chambers, each of which is a geometric extension of the other. Therefore, in cases where one of the reaction components is characterized by increased toxicity (for component polyurethane, component “B” is such a component), the container loses its environmental reliability due to possible destruction by external influences (for example, accidentally piercing a chamber with component “B”) . And as a result, the film container according to the indicated US patents has a limited scope - exclusively for packaging purposes. Industries characterized by an increased risk of destruction of the film container or in direct contact with humans, such as construction, medicine, tourism, emergency crews, mines, etc. cannot use a film container of known designs due to its insufficient environmental reliability.

The closest solution to creating the perfect film container for the reaction components of the foam is the invention of Mr. Bertram according to US patent No. 5899325. According to this patent, the film container for the manufacture of the “packaging cushion” of foam material at the place of application consists of a film bag with an air vent (for the release of gases formed during the foaming of the reaction mass) and at least 2 sealed film chambers placed in it, separated by a brittle partition, into which, in their turn ed, the reaction components are placed for obtaining a foam and filling the film package through the frangible barrier into one of the chambers, the latter collapses under the pressure of the foam formed. The mixing of the reaction components is carried out manually, without the use of mechanical mixers, by destroying the fragile partition that is located between the film chambers. Mr. Bertram's advantage and distinctive feature of the film container is the separation of the film chambers not only by means of a fragile partition, but also by mechanical bending, folding the chambers one on top of another type of “sandwich construction”. This technique generally increases the reliability of sealing the chambers relative to each other at the moments of storage and transportation of the container, but does not solve the problem of improving the environmental safety of the film container. Mr. Bertram's container remains a danger of mechanical damage to the film chamber with an environmentally hazardous component and its leak.

SUMMARY OF THE INVENTION

The objective of the invention is to create a construction of a film container containing encapsulated reaction components to obtain foam inside the container, which would retain the advantages of the design of Mr. Bertram, but possessed with increased environmental safety. The latter will allow the use of a film container in various fields of engineering, technology and life.

According to the invention, a film container, which consists of a film bag with ventilation holes and at least 2 sealed film chambers placed in it, separated by a brittle partition and mechanically during storage and transportation, and containing reaction components for the production of foam and filling it through a brittle partition in one of the chambers of the film bag by manually mixing the components during the destruction of the chambers differs from the known structures in that:

- a chamber with a component having environmental hazard (chamber “B”) has a size smaller than the size of a chamber with a second component (chamber “A”), in the filled state by an amount sufficient for its full external protection, and is protected by chamber “A” ”At the moments of storage and transportation of the container.

The most reliable option for external protection of camera “B” with camera “A” is the container design, when camera “B” is completely inside camera “A” and washed by an environmentally friendly component, and the size of camera “A” is equal to or greater than the total volume of components “ A ”+“ B ”.

Another option for the external protection of camera “B” using camera “A” is the design of the container when camera “B” is wrapped by camera “A” and has a length (in the direction of folding) selected from the ratio

where lA is the length of the chamber “A”,

lБ - the length of the camera "B",

and the width of the chamber (in the ⊥ direction of folding) is equal to or greater than the width of the chamber “B”.

Some fundamental options for protecting and minimizing cameras “A” and “B” in compliance with the above conditions are given below in FIGS. 1, 2, and 3. Moreover, these protection and minimizing schemes do not limit other options for protecting camera “B” with a camera “A” and are selected based on the specific areas of use of the container and the characteristics of the reaction system to produce foam inside the film bag.

One of the significant advantages of the claimed design of the film container, ensured by its reliable environmental safety, is the implementation of the film bag of various shapes, which makes it possible and provides manufactured “packaging pillow” the shape of the finished functional product. The latter is especially interesting for medicine (orthopedic products) and tourism (table, chair, mattress, etc.).

The inventive design of the film bag has environmental safety due to the following factors, acting at the time of accidental violation of the integrity of the camera "B" containing an environmentally hazardous component:

1. Chamber “B” cannot be destroyed without destroying the integrity of chamber “A”, since the latter, according to the invention, protects camera “B” with its own body from external damaging effects and the exit of component “B” outside the container, bypassing the neutralizing effect camera component “A”.

2. In the event of accidental damage (puncture) of chambers “A” and “B”, components will start to leak from the damaged sections of the chambers and, when they come in contact with each other, form a reaction system and then a foaming hardening mass. Moreover, the component emanating from chamber “B” will not only be neutralized by component “A”, but the resulting foam will “heal” the environmentally hazardous chamber “B”, eliminating environmental damage from accidental puncture of the cameras.

LIST OF DRAWINGS FIGURES

Figure 1 shows the circuit diagram of the protection of the camera “B”, containing an environmentally hazardous component, using the camera “A”. The position of figure 1, a - the camera “B” is placed inside the camera “A” and is washed by the component “A”. Moreover, so that the camera “B” does not have unlimited freedom of movement inside the camera “A”, it is attached to the camera “A”, for example, by spot welding.

The position of figure 1, b - the camera “B” is placed inside the camera “A” and is washed by the component “A”. In this case, the camera “B” has the ability to move freely inside the camera “A”.

Figure 2 shows a schematic diagram of the protection of the camera “B” with the camera “A” by folding it around the camera “B”. The position of figure 2, a shows the location of the chambers in working condition before the destruction of the fragile partition between the chambers for mixing the components.

The position of figure 2, b shows the location of the cameras “A” and “B” at the moments of storage and transportation of the inventive container, when the camera “B” is protected by a camera “A” wrapped around it at lА≈2lБ.

Figure 3 shows a schematic diagram of the protection of camera “B” using camera “A” by folding it around camera “B” at lА≈1,1lБ (position “a”) or by placing camera “B” inside camera “A” ”Without flushing the camera“ B ”with component“ A ”(position“ b ”).

Figure 4 shows the design of the inventive film container at the time of its preparation for operation (in the unfolded state) before the stage of forced destruction of the brittle partition (3) for subsequent manual mixing of the reaction components “A” and “B”.

Figure 5 shows the design of the inventive film container at the time of folding to protect the camera “B” with the camera “A” during storage and transportation of the container to the storage location.

1 - chamber “B” (hatched, contains environmentally hazardous component “B”).

2 - chamber “A” containing the environmentally friendly component “A”.

3 - a fragile partition separating chamber “B” from chamber “A”, which is destroyed at the beginning of mixing of the components.

4 - film bag.

5 - ventilation holes.

6 - a fragile partition.

7 - container in the folded (partially) state

8 - cameras “A” and “B” in the folded state.

DETAILED DESCRIPTION OF THE EMBODIMENTS OF THE INVENTION

The claimed invention - the construction of a film container - can be carried out without any additional research on an experimental scale, since all the necessary starting materials, technology for their use and raw materials, in particular for the manufacture of packaging polyurethane foam at the place of use, are available on the market.

The basic requirements for starting materials and raw materials for the trial use of the invention are in principle the following:

1. The material for the manufacture of the film bag must be flexible and durable enough to take various forms, sometimes very developed, thin, packaged products, and also must have the ability to weld and / or stick together. Such material may be polyethylene, polyvinyl chloride, polyethylene terephthalate, polyamide, both independent and duplicated films and fabrics. The material of the film bag should not pass through a foaming reaction mass.

2. The material for the manufacture of film chambers for the reaction components must also be sufficiently flexible and durable in order to allow manual mixing of these components for a few seconds to several minutes. Such mixing is carried out by a partial (without destruction) pulsating deformation of the chambers filled with components during the complete destruction of the fragile partition connecting / disconnecting the cavities of chambers “A” and “B”. In addition, the material of the film chambers must be inert with respect to the reaction components, but also must not let them pass through, be vapor-tight for them during the shelf life of the container. In addition, the material of the film chambers, at least one of its outer coatings, must be able to weld and / or adhere to this coating. Therefore, it is advisable to choose materials for these chambers from multilayer metallized films. Such a material may be, for example, a film of composition:

- the outer layer is a polymer polyethylene or polyethylene terephthalate film (thickness about 20-50 microns),

- the middle layer is a metal (aluminum) foil (10-20 microns),

- the inner layer is a polymer chemically resistant film, for example, polyethylene or polytetrafluoroethylene (20-120 microns).

3. The reaction components for the formation of foam inside the polymer bag must be able to give a reaction system with manual mixing, which, in turn, must generate a moving mass that can fill the film bag and cure under normal conditions, without releasing toxic substances during foaming and curing. Such requirements are met, for example, by 2-component polyurethane foam systems, in which component “A” is a hydroxyl-containing oligomer (polyester) with target additives, and component “B” is an isocyanate-containing product (polyisocyanate). When mixed, these components form a lightweight filling type polyurethane foam.

The inventive design of the film bag, in principle, consists of a film bag (4, Fig. 4), in which there are ventilation holes (5) designed to exit the gases formed during the production of foam inside the film container (4). At least two film chambers (1 and 2) are placed in a film bag, separated by a brittle partition (3) and filled with reaction components (A and B) to produce a foaming moving mass when they are manually mixed, when the brittle partition (3) is destroyed by an external exposure. Chamber “A” or chamber “B” also has a fragile partition (6) that separates it from the free space of the film bag (4).

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

- after the deployment of the film container from the position (Fig. 5) inherent in it during storage and transportation to the position (Fig. 4), the working, unfolded container is laid on a horizontal flat surface so that one of its large sides (9) rests on this surface. Then, by pressing on the container “B” with your hands or with a roller, the brittle partition (3) is destroyed and manually, one by one, crush, distill component “B” towards component “A” and, conversely, until foaming begins (filling) chambers) of the reaction system. Stirring is stopped and the container is placed, for example, on the bottom of the packaging box (when the container is intended for packaging purposes). Then they observe how the reaction mass foaming in the chambers by its pressure destroys the brittle septum (6) and begins to fill the film bag (4). After waiting for the required degree of filling of the bag, a packable (breaking, brittle, etc.) part is laid on it and a second film container is placed on top of this part, which is in approximately the same condition as the foaming container in the foaming mass. The process ends and the part is in its full packed state when in both containers (in the upper and lower) with the lid of the packaging box closed, foaming and curing of the formed material will cease.

When using the inventive design of the film container in other applications, the described process steps are saved, but the number of containers used, technological methods and completion of the process depend on the specific conditions of use of the container.

Claims (4)

1. A film container, consisting of a film bag with ventilation holes and at least 2 film chambers placed in this bag, separated by a brittle partition and capable of some movement relative to each other, and containing reaction components to produce foam and fill the film bag through a fragile partition in one of the chambers by manually mixing these components while breaking the tightness of the chambers, characterized in that the chamber with a component having environmental hazard y (chamber "B") is protected from external damaging by a camera with a component that is environmentally friendly (camera "A"), and camera "B" has a size smaller than the size of chamber "A" in the filled state by an amount sufficient to complete external protection. 2. The film container according to claim 1, 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" + "B". 3. The film container according to claim 1, 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

where lA is the length of the camera ″ A ″, lБ - camera length ″ B ″, and the width of the chamber (in the direction perpendicular to folding) is equal to or greater than the width of the chamber "B". 4. The film container according to claims 1 to 3, characterized in that the film bag in working condition, filled with foamed foam, has the form of a finished functional product for use in tourism and medicine.

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