JP2000335607A5 - - Google Patents

Description

[Document name] statement
Patent application title: Metal tube for extrusion, the inner wall of which is coated with a resincontainer
[Claim of claim]
[Claim 1]
  An extrusion metal tube in which one or more resin layers are coated on the inner wall of the metal tube,
  The resinous skin layer coated on the inner wall of the metal tube is only the thermoplastic resin layer which can be adhered to the inner wall of the metal layer, and the layer between the metal layer and the resin layer is at least partially adhered And a metal tube container for extrusion, in which the thermoplastic resin layer protects the contents against the environment, or
  The inner wall of the metal layer is at least partially covered with a thermosetting resin having metal adhesion, and on the surface of the thermosetting resin layer, a thermoplastic resin layer which is difficult to adhere to the thermosetting resin layer is Metal tube container for extrusion that is overlaid to protect the contents against the environment.
[Claim 2]
  Even after the skirt portion of the metal tube is fastened, one or more resin layers coated on the inner wall of the skirt portion are sealed by a means that does not cause interlayer fusion with the opposing resin layer The metal tube container for extrusion according to claim 1, wherein internal gas can leak out from the sealing portion.
[Claim 3]
  The inner wall of the metal tube is coated only with a thermoplastic resin layer with metal adhesion, and the tail end area of the thermoplastic resin layer is thickened. Metal tube container for extrusion.
[Claim 4]
  The inner wall of the metal tube is coated only with a thermoplastic resin layer with metal adhesion, and the tail end area of the thermoplastic resin layer is reduced in thickness.Or 2The metal tube container for extrusion as described in.
[Claim 5]
  A thermosetting resin with metal adhesion to the inner wall of the metal tube, extending from the skirt to the area adjacent to the mouth and neck.Fat layerIs coated, and the inner wall of the mouth neck of the metal tube isFat layerThermoplastic resin that is difficult to adhere to and can adhere to the metal layerFat layerIs fixed to the inner wall of the metal tube by covering the metal tube.4Extrusion metal according to any of
Genus tube container.
[6]
  Thermosetting wood with metal adhesion to the inner wall of the metal tube from the skirt to the area adjacent to the shoulderFat layerIn addition to the fact that the inner wall of the shoulder and the inner wall of the neck and neck of the metal tube areFat layerThermoplastic resin that is difficult to adhere to and can adhere to the metal layerFat layerThe invention is fixed to the inner wall of the metallic tube by being coated.4The metal tube container for extrusion as described in any of the above.
[7]
  A metal tube container for extrusion, wherein the metal forming the metal tube is one or more metals selected from the group consisting of aluminum, tin and zinc, or an aluminum alloy, a tin alloy and a zinc alloy At least one alloy selected fromThePhenol-formaldehyde resin, cresol-formaldehyde resin, epoxy resin, polyamide imide resin, melamine resin as a thermosetting resin with metal adhesiveness which is coated from the inner wall of the bottom of metal tube to at least the inner wall of the body , One or more trees selected from urea resin and urethane resinFat layerAnd at least one tree selected from the group consisting of polyethylene resins, polypropylene resins, polyester resins, and ethylene-propylene thermoplastic elastomers as the thermoplastic resin formed on the surface thereof.Fat layerThe invention is formed at least from the inner wall of the neck and neck portion to the inner wall of the trunk portion.6The metal tube container for extrusion as described in any of the above.
Detailed Description of the Invention
[0001]
Field of the Invention
  The present invention relates to a metal tube container for extrusion in which a resin coating is coated on the inner wall, and the container can protect the contents from contact with the outside even by perforation or breakage of a metal layer, more specifically, the above-mentioned tube container And a combination of one or more resin layers coated on the inner wall thereof. More specifically, the present invention is an extrusion suitable as a container for containing, transporting (conveying) and storing semi-pasty medicines, hair setting agents, hair coloring agents, cosmetics, foods, food additives, adhesives and sealants. The present invention relates to a metal tube container. In the present invention, "for extrusion" means "to be used for the purpose of extruding the contents".
[0002]
[Prior Art]
  2. Description of the Related Art A metal tube container for extrusion has been widely adopted as a container for containing semi-pasty contents such as ointments, tooth pastes, hair dyes and other high viscosity substances as described above. In this container, after the contents are loaded from the tail end opening (tail end opening), the contents are exposed to external oxygen, carbon dioxide and / or water etc. by, for example, folding and sealing this tail end opening. Store the contents so as not to touch.
[0003]
  Such a metal tube container for extrusion is excellent in shape retention, storage property, transportability, portability, etc., and also has little absorption of external air after content extrusion, and the contact between the content and external air is minimized. It has the advantage of being limited. For example, JP-A-59-16850 discloses a metal tube for extrusion as described above.ContainerIn general, a light metal material such as aluminum or an aluminum alloy is adopted as a base material to be constituted, and in some cases, a metal material such as tin is adopted. AndOn the inner wallIs a coating (coating) with corrosion resistance so that it can also contain corrosive contentsLayer isIt is formed (covered). In order to form a coating film layer of a thermosetting resin against metal adhesion as a coating film having corrosion resistance, conventionally, a liquid thermosetting resin such as an epoxy resin or an epoxy-phenol resin should be coated. Spraying to the substrate surface and subsequent baking were performed.
[0004]
  As a modification of the inner surface resin-coated metal tube container, a double tube in which a resin tube is internally fitted to a metal tube has already been used. However, this type of double tube increases the cost due to the increase in the number of steps for inserting the resin tube, and the inserted resin tube is inserted.
Retention of contents in the tube due to difficulty in squeezing out the contents due toThere was a problem of. As another problem, when the content is decomposed during storage to generate a gaseous substance, for example, when the content is hydrogen peroxide or the like, the internal pressure of the resin tube caused by oxygen gas generated by the decomposition There was also a risk that the ascent would eventually burst.
[0005]
[Problems to be solved by the invention]
  If the hair dye or the like that generates gas with the passage of time of storage is filled as a content in a container of this type, seal the skirt (tail end) after filling (seal) ) After degassing the internal gas from this gas passage, and then seal the skirt end opening mechanically by folding or the like. Measures are being taken.
[0006]
  For this purpose, it is necessary to apply a resin coating having a sufficient thickness as a coating film layer, since it is necessary to apply a sealing process such that the degassing passage is naturally opened as needed at a later date. is there. However, it has been difficult to ensure that the coating layer has a sufficient thickness. Moreover, in the case of the type of contents generating internal gas, the internal pressure still increases even after sealing, and it is finally tried to break the seal at the tail end (tail end). As a result, there is also a problem that if the seal at the end of the skirt portion is not provided with sufficient durability, it is broken and the content liquid may leak out.
[0007]
  In view of such circumstances, the present invention has an object to provide a metal tube container for extrusion which can be sealed so as to avoid an increase in internal pressure by leakage of the internal gas by leakage of the inner end of the metal tube container for extrusion. And
[0008]
[Means for Solving the Problems]
  The metal tube container for extrusion according to the present invention, which has been developed to achieve the above object, achieves the desired effect by being defined by the following various constituent requirements:
(1) A metal tube for extrusion in which one or more resin layers are coated on the inner wall of the metal tube, and the resin skin layer coated on the inner wall of the metal tube is the inner wall of the metal layer Only for thermoplastic resin layers that can be adhered to the metal layer, and at least a layer between the metal layer and the resin layer is at least partially adhered, and the thermoplastic resin layer protects the contents against the environment A metal tube container or an inner wall of the metal layer is at least partially covered with a thermosetting resin having metal adhesion, and it is difficult to adhere to the thermosetting resin layer on the surface of the thermosetting resin layer Metal tube container for extrusion, in which a thermoplastic resin layer is overlaid to protect the contents against the environment.
(2) Even after the skirt portion of the metal tube is fastened, the one or more resin layers coated on the inner wall of the skirt portion are sealed by means other than heat sealing. May leak internal gas from the(1)The metal tube for extrusion as described in.
(3) The inner wall of the metal tube is coated only with a thermoplastic resin layer with metal adhesion, and the tail end area of the thermoplastic resin layer is thickenedSaid (1)Or(2)The metal tube container for extrusion as described in.
(4) Only the thermoplastic resin layer with metal adhesion is coated on the inner wall of the metal tube, and the tail end area of the thermoplastic resin layer is reduced in thicknessSaid (1) or (2)The metal tube container for extrusion as described in.
(5)A thermosetting resin with metal adhesion to the inner wall of the metal tube, extending from the skirt to the area adjacent to the mouth and neck.Fat layerIs coated, and the inner wall of the mouth neck of the metal tube isFat layerThermoplastic resin that is difficult to adhere to and can adhere to the metal layerFat layerIs fixed to the inner wall of the metal tube by(1) to (4)The metal tube container for extrusion as described in any of the above.
(6)Thermosetting wood with metal adhesion to the inner wall of the metal tube from the skirt to the area adjacent to the shoulderFat layerIn addition to the fact that the inner wall of the shoulder and the inner wall of the neck and neck of the metal tube areFat layerThermoplastic resin that is difficult to adhere to and can adhere to the metal layerFat layer
Said being fixed to the inner wall of said metallic tube by being covered(1) to (4)The metal tube container for extrusion as described in any of the above.
(7)A metal tube container for extrusion, wherein the metal forming the metal tube is one or more metals selected from the group consisting of aluminum, tin and zinc, or an aluminum alloy, a tin alloy and a zinc alloy At least one alloy selected fromThePhenol-formaldehyde resin, cresol-formaldehyde resin, epoxy resin, polyamide imide resin, melamine resin as a thermosetting resin with metal adhesiveness which is coated from the inner wall of the bottom of metal tube to at least the inner wall of the body , One or more trees selected from urea resin and urethane resinFat layerAnd at least one tree selected from the group consisting of polyethylene resins, polypropylene resins, polyester resins, and ethylene-propylene thermoplastic elastomers as the thermoplastic resin formed on the surface thereof.Fat layerAre formed at least from the inner wall of the neck and neck portion to the inner wall of the trunk(1) to (6)The metal tube container for extrusion as described in any of the above.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In the present specification, “upper and lower, right and left, front and rear, front and back” and the like are expressions for convenience of description.
  The preferred embodiment of the present invention, as summarized in FIG. 1, will now be described. FIG. 1 is a schematic longitudinal sectional view showing an example of a preferred embodiment of a metal tube container for extrusion (sometimes simply referred to as a "tube container") used in the present invention. In this extrusion metal tube container 10, the cylindrical body 7a is thin.
Metal foil Usually, it is formed of aluminum foil, and on the outer wall 7nx of the neck 7n located at the upper end of the body 7a, a screw thread 7m for crowning and screwing a cap (not shown) is formed . In addition, the neck
The upper end opening 8 is closed by being crown-mounted on the upper end opening 8 at the upper end of the portion 7n, for example, an aluminum cap or a resin cap that is generally the same metal as the trunk 7a. The closing mode of the upper end opening 8 is selected to correspond to either of two types of specifications which are the shape (type) of the opening, that is, the nipple specification or the membrane specification.
[0010]
  On the other hand, on the inner wall of the tube container 10, it is located at the end of the skirt portion 11, that is, at the skirt end 11z.
Opening (feet end opening; tail end opening) 11 v is still in the open state.
  In the specification of the present invention, "inner layer" or "skin layer" means, for example, the side approaching the contents in the tube container 10 or the side approaching the long axis of this container, and "upper and lower", " The terms “left and right”, “front back” or “front and back” are expressions for convenience of the description.
[0011]
  In the preferred embodiment (classification numbers “(1) -1 to (1) -5” in Table 1) of the present invention shown in FIG. 1 (A), in the tube container 10, the inner wall 7ai of the body 7a is heated. Single-type resin layer 12 made of plastic resin
1 (B), which is the embodiment coated by
Class number “(1) -1 to (1) -4”) indicates that the resin layer covering the inner wall of the tube container 10 is a composite (multilayer) resin
Layer 12, made of thermosetting resin with metal adhesionThermosetting resin layer 12 b (“resin base
Layer 12 b))Consists of thermoplastic resin on the surface ofThermoplastic resin layer 12p (also referred to as resin protective layer 12p)Is an embodiment in which the
[0012]
  The detailed configuration of the tube container shown in FIG. 1 (A) is described in the following Table 1 together with its variation.
  Here, the case (classification number (1) -1) will be described as an example in the case where the thermoplastic resin layer 12 in FIG. 1 (A) can sufficiently adhere to the surface of the metal layer. In this example, in FIG.
The thermoplastic resin layer 12 serves both as the resin base layer 12b and the resin protective layer 12p, and at least the neck inner wall 7ni of the tube container 10, the inner wall 7si of the shoulder 7s, and the trunk inner wall 7ai
It is sufficient if it is firmly fixed to at least one or more selected from one or more of the above. Rather, the thermoplastic resin layer 12 is not fixed entirely to the body inner wall 7ai (partially free)
Preferably). That is, a thermoplastic resin layer (thermoplastic resin) is applied to the inner wall 7ai of the body.
Forming a tube or a thermoplastic resin bag) 12 is only partially fixed and is loose in general
It is rather preferable in terms of usability. The reason is that the external force applied to the body 7a is
Therefore, it is expected that the incorporated thermoplastic resin layer 12 is not easily entrained by breakage or breakage even when breakage or breakage occurs, and the content is still expected to be substantially insulated from the external environment It is.
[0013]
  The fixing mode of the thermoplastic resin layer 12 to the body inner wall 7 ai in the various modes (classification numbers “(1) -1 to (1) -5” in Table 1) shown in FIG. Various types are adopted, including the one fixed to 7ni and shoulder inner wall 7si.CanRu. For example, when the thermoplastic resin layer 12 has sufficient adhesion to the metal layer forming the body inner wall 7ai (classification number "(1) -1, (1) -3 to (1) in Table 1) -Five")
In the thermoplastic resin layer12In order to form an “adhesion-preventing zone” which does not adhere to a predetermined portion of the inner wall 7ai of the trunk, a substance which adheres sufficiently to the inner wall 7ai of the trunk as an “adhesion inhibitor” but hardly adheres to the thermoplastic resin. It is possible to exemplify an embodiment in which the portion is released from the metal layer by coating or applying a sticking film or the like formed of the substance. Here, for example, as an embodiment in which an adhesion inhibitor is applied or an adhesion film (adhesion inhibition film; adhesion inhibition layer; abbreviation "AIL") formed of an adhesion inhibitor is attached, small sections (spots), lines Band (belt or zone) or those
The aspect of covering (applying, sticking, etc.) by an appropriate | suitable range and shape at an appropriate | suitable place by the form of the combination of etc. can be mentioned. As the above-mentioned adhesion inhibitor, for example, a wax-like substance or a grease-like substance made of an oil repellent substance such as silicon wax (organopolysiloxane) is practical.
[0014]
  Among the above-mentioned fixed modes, those having practicality are the "Tiger stripe type" (TST) mode in which a strip of silicon wax or the like is formed on the inner wall 7ai of the trunk so as to be substantially orthogonal to its generatrix In practice, a “screw-stripe type” (CST) mode etc., in which a strip of silicon wax or the like is covered in a spiral around the major axis X
It is easy on the application operation of
  In addition, although arrangement, ie, a position, width, mutual intervals, etc. of the above-mentioned "adhesion prevention strip" may be selected suitably, a comparatively wide adhesion prevention strip is relatively spaced on the body inner wall 7ai. Usually, it is sufficient to put it on the side wall 7a. If three strips of width 40 mm are attached to the inner wall 7ai about 200 mm long at the position near the shoulder 7s and the approximate middle position of the body 7a, It is sufficient as "striped" (TST). Here, in the middle portion of the trunk portion 7a and thereafter and the skirt portion 11 following it, thermoplastic
It is important for exhibiting the effect of the present invention that the oil layer 12 is in a free state from the body inner wall 7ai. That is, in this area, the body 7a is deformed by pressure contact or intense bending etc. as the contents are squeezed out.
It is an area that is susceptible to breaking or tearing, etc. The thermoplastic resin layer 12 is formed from the body 7a.
In the free state, even if breakage or breakage occurs in the body 7a, the body 7a is released from the inner wall 7ai of the body.
The contents can be said to be the inner cylinder or the inner bag formed by a certain thermoplastic resin layer 12 because the influence of breakage or tearing hardly affects, and the contents are still in the insulating state from the breakage of the body 7a etc. heat
It is protected in the pouch formed of the plastic resin layer 12.
[0015]
  Each aspect (classification numbers “(1) -1 and (1) -3 to (1) -5” in Table 1) represented by the above-mentioned FIG.
In any case, the thermoplastic resin has sufficient adhesion to the metal layer forming the inner wall 7ai of the body 7a.
Is described as an example. However, conversely, even if the thermoplastic resin has little adhesiveness to the metal layer (classification number (1) -2), the metal layer and the thermoplastic resin layer 12
An adhesion imparting layer (abbreviated as “ASL”) made of a material having sufficient adhesiveness to both
Various forms used to form an anti-adhesion zone, for example, small sections (spots), strips (belts or
It can be suitably covered in the same form as the zone) or a combination thereof. Among them, "Tiger stripes
Mold (TST) and / or “screw-strip” (CST) at the appropriate locations as described above on the surface of the metal layer, and covering the thermoplastic resin layer 12 of the continuous layer so as to cover the respective locations Of course, the preferred embodiments of the present invention are also included in various embodiments represented by FIG. 1 (A) as preferred embodiments of the present invention. That is, even this embodiment is included in the configuration of the present invention described above and can exert the effects of the present invention.
[0016]
  The above-mentioned adhesion imparting layer (ASL) does not stay between the metal surface and the thermoplastic resin layer 12, depending on the case.
IsResin protective layer as shown in Fig. 1 (B)12p andResin base layerIt can also be used between 12b. Each of the above-mentioned adhesion preventing layer (AIL) and adhesion imparting layer (ASL) is not limited to the purpose of completely eliminating adhesion (non-attachment) and the purpose of achieving strong adhesion (adhesion), but they are appropriate. It can also be used for the purpose of adjusting to the strength of, and for the purpose of expressing their action in a desired area.
[0017]
  As an adhesion inhibitor which can be used in the preferred embodiment typically illustrated in FIG. 1 (A) above, a thermosetting resin can be used instead of the silicone wax etc. illustrated. The reason is that a thermosetting resin with metal adhesion does not exhibit adhesion to thermoplastic resins such as polyolefins (resins), and conversely, a resin that generally exhibits sufficient adhesion to metal layers. You are asked to be there.
[0018]
  In each of these embodiments (classification numbers “(1) -1 and (1) -3 to (1) -5” in Table 1),Resin protective layer
Thermoplastic resin layer forming 12pIs a resin base layer 12b made of a thermosetting resin with metal adhesion.It is suitably used that it is one that shows almost no adhesion. However, the meaning of "showing little adhesion" does not exclude "temporary attachment". That is, in the stationary state, both layers form a dense layer closely, but even if the layers are in close contact to such an extent that they are easily peeled off by application of a large external force, they are "temporarily attached" It is included in things.
[0019]
  The example of another preferred embodiment of the present invention (classification numbers "(2) -1 to (2) -4" in Table 1) representatively shown in FIG. 1 (B) is a resin base layer (here, adhesion inhibition layer) Thermosetting of metal adhesion to metal as 12b)
TreeFatThe resin base layer 12 b is formed on the body inner wall 7 ai of the metal tube container 10 for extrusion,
The above-mentioned “screw” is at least in a range (excluding the neck and neck) from the inner wall 11i of the foot to the inner wall 7si of the shoulder
Adhesive to metal (with sufficient adhesion to the metal layer) on the surface coated in “stripe”Resin protective layerThe embodiment which covered 12p as a continuous layer is shown. thisResin base layerThe average layer thickness of 12 b is usually set to about 3 to 10 μm, preferably about 5 to 8 μm, which is sufficient in most cases.
[0020]
  The detailed configuration of the tube of the present invention typically illustrated in FIG. 1 (B) is described in the following Table 1 together with its variation.
  In addition, the preferred embodiment (classification number in Table 1) representatively shown in FIG. 1 (A) which is one embodiment of the present invention
In No. “(1) -1 and (1) -3 to (1) -5”), adhesion to the metal layer was provided on the inner wall 7ai side of the body inner wall 7ai of the metal tube container 10 made of aluminum or the like. Tree made of thermoplastic resinFat layer12 is directly coated, but the preferred embodiment shown in FIG. 1 (B), which is another example different from the embodiment (Table 1).
In the case of the classification number “(2) -1 to (2) -4” of the above, in the tube container 10, first, the thermosetting resin having metal adhesiveness to the inner wall 7ai of the body 7a.Resin base layer consisting ofForm 12b, and after curing it
In the face, thisResin base layerThermoplastic resin difficult to adhere to 12bResin protective layerEven if the metal layer of the tube container breaks or breaks by forming 12p, a composite (layered) tree which can sufficiently protect the contents in a state of being insulated from the external environment.Fat layerYou can also create twelve.
[0021]
  Each of the above-mentioned embodiments (classification numbers "(2) -1, (2) -3 and (2) -4" in Table 1) corresponds to the metal body inner wall 7ai.
For example, the case where the thermoplastic resin has sufficient adhesiveness is described. However, conversely, when the thermoplastic resin has little adhesion to the metal layer (the minute in Table 1)
An adhesive strip made of a medium material (adhesion imparting agent) having sufficient adhesiveness to both the metal layer and the thermoplastic resin layer 12 even with the class number “(2) -2”) is a metal As a matter of course, as shown in FIG. 1 (A) and FIG. 1 (B) of the present invention, the layer is coated on the layer surface suitably as described above, and the thermoplastic resin layer 12 of the continuous layer is coated to cover each portion. Is encompassed by the embodiment of the present invention. That is, even with these embodiments (classification numbers “(1) -2 and (2) -2” in Table 1), the effects of the present invention can be exhibited. Of course, thermosetting resins can be used as long as the adhesive strip in the embodiment of FIGS. 1 (A) and 1 (B) has sufficient adhesiveness to the thermoplastic resin. . Main story
Among the resins that are widely used as thermoplastic resins in Akira, polyolefins (resins) are used
If so, their adhesion to metal generally falls short of the required level. This polyolefin (
Resin), for example,Chille(Resin), polypropylene (resin), ethylene-propylene
Although it may be used in the form of a polymerized resin, a propylene-ethylene copolymer resin, a composition (mixture) of two or more of these, etc., these generally lack adhesion to metal.
[0022]
  Examples of the adhesion-imparting agent which imparts adhesiveness to the above-mentioned thermoplastic resin layer having poor or lacking metal adhesion include unsaturated organic acids and derivatives thereof, such as maleic acid, itaconic acid, citraconic acid, Examples of mesaconic acid, tetrahydrophthalic acid or norbornene dicarboxylic acid and acid derivatives include maleic anhydride, itaconic acid anhydride, citraconic acid anhydride, mezaconic acid anhydride, tetrahydrophthalic acid anhydride, norbornene dicarboxylic acid anhydride and the like. be able to. The most preferred of these is maleic anhydride.
[0023]
    <Heat thickening>
  In the preferred embodiment of the present invention, as summarized in FIG. 2, the embodiment shown representatively in FIG.
The classification number "(3) -1 to (3) -4") in 1 is that the inner wall 7ai of the body of the metal tube 10 is a thermoplastic resin
And the embodiment shown in FIG. 2 (B) (classification numbers “(4) -1 to (4) -4” in Table 1). ") Is a composite (polymerized) resin layer in which the resin layer 12 coated on the inner wall 7ai of the metal tube 10 is a resin base layer 12b made of a thermosetting resin
In each of the embodiments in which the protective layer 12p made of a thermoplastic resin is overlaid on the surface of the
In this embodiment, the protective layer 12p is thickened from the skirt inner wall 11i to the skirt end 11z.
[0024]
  Figure 2The present invention shown in (B)Preferred embodiment (classification number “(Four)-1 to 1(Four)-4 "), in the area near the skirt end opening 11v in the inner wall of this extrusion metal tube container 10, that is, in the area of the skirt inner wall 11iResin protective layer12p thickness of the other area, that is, adhesion to metal in the body inner wall 7ai,resin
Base layerIt is formed sufficiently thick compared to the layer thickness of the thermoplastic resin layer 12 in the area covered by 12b
Yes (thick).
[0025]
  The detailed configuration of the tube of the present invention shown in FIG. 2 (A) is described in the following Table 1 (classification number “(3) -1 to (3) -4”) together with its modified embodiment.
  The significance of this skirt thickening is that this part can normally prevent the ingress of outside air without being subjected to interlayer fusion sealing, for example, heat sealing (heat sealing), and the gas and / or vapor generated from the contents by storage When the pressure (internal pressure) caused by etc. exceeds a predetermined value, the flow passage is opened by the pressure and leaks the generated gas, and after the internal pressure is restored, the flow passage forms a state where it can be naturally closed. It is to let
[0026]
  Here it was thickenedResin protective layerTaking the example of a standard sized tube (length 200 mm × outer diameter 25 mm) as an example, the 12p covering area suffices within the area extending from the inner wall 11i of the skirt to the inner wall 7si of the shoulder usually 15 to 30 mm. In the embodiment of the present invention, the area is set to about 20 mm. In the inner wall 7ai of the trunkResin protective layerIf the layer thickness of 12 p is usually 20 to 200 μm, the average overall layer thickness range of the thermoplastic resin (protective) layer in the thickened area is, for example, an upper limit of 600 μm or less,
A setting of preferably 10 to 300 μm is sufficient in many cases. In addition,
This thickened area is an area to be provided for the later-described crimp seal of the skirt portion 11 as shown in FIG. The average layer thickness range of this skirt (thickened portion) 11 (Resin base layer 12bLayer thickness of +Resin protective layer 12pof
Layer thickness) is usually 1.5 to 30 times the average barrel (resin) layer thickness of 20 to 200 μm.
For the purpose, the initial effect is sufficiently exhibited.
[0027]
  Thus, a sufficiently thick resin single layer (which serves as both the base layer and the protective layer) 12 or the resin protective layer 12p
For example, electrostatic coating using a powder coating of a thermoplastic resin is suitable as a means for forming. By adopting such a coating method, it is possible to form a sufficiently thick coating film in a very short time (high speed) as compared to coating with solvent-type paint, which has conventionally been generally performed.
It is not necessary to set up a closed system necessary to prevent leakage of the volatilized organic solvent to the outside air. This closed system is generally a large-scale facility, and has the problem of being difficult to accept for small-scale implementation with small capital.
[0028]
  In a preferred embodiment of the present invention, a specific extension extending from the skirt inner wall 11i to the mouth neck inner wall 7ni side
By partially thickening (partially thickening) the resin layer thickness applied in the area, for example, after degassing from this area and folding and sealing it is assured against the ingress of outside air. While a sealing effect can be expected, it can be expected that the gas and / or vapor etc. which were generated inside tube container 10 will be discharged from this area (leakage).
[0029]
  Further, by adopting the above-described skirt thickening, for example, the trunk inner wall 7ai of the tube container 10 can be made of wood without increasing a special sealing step.Fat layerAt the same time as the work of forming 12, it is possible to carry out a crimp seal of the tail portion (tail end) 11 subsequently to or separately from it.
  In FIG. 2A (classification number (3) -1), which is one embodiment of the present invention, gold such as aluminum is used.
Sufficient adhesion to the metal layer was provided on the inner wall 7 ai side of the tube container 10 made of
(Adhesive) resin made of thermoplastic resinFat layer12 is directly covered. In FIG. 2A (classification number (3) -1), the thermoplastic resin layer positioned on the inner wall 11i of the foot portion12As long as
An aspect in which most of the surfaces are adhered to the inner wall 7ai of the body is also within the scope of the present invention, and further an aspect in which the entire surface is adhered is also located in the outer edge area of the scope of the present invention.
[0030]
  In another different preferred embodiment (classification number (4) -1) typically shown in FIG. 2 (B), the tube container 1 is used.
Thermosetting resin with metal adhesion to the inner wall 7ai of the body at 0 firstResin base layer consisting of12b
Form and after curing on this surfaceResin base layerThermoplastic tree difficult to adhere to 12b
OilResin protective layerBy forming 12p, even when the body 7a is broken or broken, a composite (overlaid) tree which can still protect the contents in an insulated state with itFat layerYou can also create twelve.
[0031]
  The detailed configuration of the tube container 10 of the present invention typically shown in FIG. 2 (B) is described in the following Table 1 together with its modification.
  Preferred embodiment examples (classification numbers "(4) -1, (4) -3 and (4) -4") representatively shown in FIG. 2 (B) described above
Is described by way of example in which the thermoplastic resin has sufficient adhesion to the metal body inner wall 7ai. However, conversely, even in the case where the thermoplastic resin has almost no adhesiveness to the metal layer (classification number (4) -2), both the metal layer and the thermoplastic resin layer 12 can be obtained. enough
An adhesive application layer (ASL) made of a medium material having adhesiveness, in the form of an adhesive strip, etc.
As a matter of course, the thermoplastic resin layer 12 of the continuous layer is coated so as to cover the appropriate portions as described above on the surface of the inner wall 7ai as described above. It is included in the aspect of B). That is, even these embodiments are included in the configuration of the present invention described above and can exert the effects of the present invention. Of course, a thermosetting resin having sufficient adhesiveness to the thermoplastic resin layer can be used to form the adhesive strip in the embodiment of FIGS. 2 (A) and 2 (B).
[0032]
    <Heat reduction>
  In the preferred embodiment of the present invention, as summarized in FIG. 3, the embodiment representatively shown in FIG. 3 (A) (Table 2).
The “classification numbers (5) -1 to (5) -4”) in the above are covered with a single resin layer 12 made of thermoplastic resin.
In the embodiment (classification numbers “(6) -1 to (6) -4” in Table 2) shown representatively in FIG. That is, a thermosetting resin with metal adhesionFatIn each of the embodiments in which the protective layer 12p made of thermoplastic resin is overlaid on the surface of the resin base layer 12b, which is made of thermoplastic resinResin layer 12(Or protective layer12p)Is a mode in which the thickness is reduced from the bottom inner wall 11i toward the bottom end 11z.
[0033]
  In the preferred embodiment (classification number (5) -1) of FIG. 3 (A), the metal tube container 10 for extrusion is provided on the inner wall.
Thermoplastic trees in the area near the tail end opening 11vFat layer12 thickness is the other area, ie body
It is formed sufficiently small (thin) as compared with the layer thickness of the thermoplastic resin layer 12 in the inner wall 7 ai (a thickness reduction range).
  The detailed configuration of the tube 10 of the present invention typically shown in FIG. 3 (A) is described in the following Table 2 together with its modification.
[0034]
  Here, the area covered with the reduced thickness of the thermoplastic resin layer 12 (thickness reduction area) is, for example, the bottom of a metal tube of a standard size (length 200 mm × outer diameter 25 mm)endShoulder inner wall 7si from opening 11v
Generally, it is sufficient to set an area that extends approximately 15 mm to 30 mm on the side, and approximately 20 mm in each embodiment of the present invention. If the layer thickness of the thermoplastic resin layer 12 on the body inner wall 7ai is 80 to 120 mm, the thermoplastic resin layer in the reduced thickness area12If the average layer thickness of (protective layer) is set to, for example, 40 μm or less, preferably 30 to 10 μm, it is sufficient in many cases.
[0035]
  In addition, the thickness reduction range is a tail portion after content filling, as exemplarily shown in FIGS. 3 (A) and 3 (B).endThe range in which the opening 11v is provided for resin layer fusion sealing, usually heat sealing
It is. Although the skirt inner wall 11i is usually folded after heat sealing, it carries a sealing effect.
The seal is a heat seal, and the clamping is only a secondary carrier.
[0036]
  Thus, a sufficiently thin thermoplastic resin (single layer) 12, a composite (multilayer) resin layer 12TheAs a means to form, the electrostatic powder coating method using the powder coating which consists of thermoplastic resins is suitable, for example. By employing the electrostatic powder coating method, it is possible to ensure a sufficiently thin coating compared to spray coating or roll coating using a solvent type or liquid dispersion type paint that has conventionally been generally used. It can be formed, and it is not necessary to set up a closed system necessary to prevent the volatilized organic solvent from leaking into the open air. This closed system is generally a large-scale facility, and has the problem of being difficult to accept for small-scale implementation with small capital.
[0037]
  Further, by adopting the foot thickness reduction in the thermoplastic resin layer 12 described above, for example, at the same time as covering the resin layer 12 on the body inner wall 7 ai of the tube container 10 without increasing the special sealing step. Subsequently to or separately from it, the bottom (tail end area) inner wall 11i
Heat sealing can also be performed.
  In the preferred embodiment (classification number (6) -1) of FIG. 3 (B), the composite (multilayer) resin layer 12 is made of gold.
First, a thermosetting resin layer 12b with metal adhesion is formed on the surface of the metal layer on the inner wall 7ai of the metal tube container 10 so that the thermosetting resin layer 12b adheres firmly from the inner wall 11i of the skirt to the lower end of the inner wall 7ni of the neck portion Thermoplastic resin which is a protective layer on its surfaceResin protective layer12p is in temporary wearing condition
Overlaid. Therefore,Resin protective layer12p is applied if a relatively strong peeling force is applied.
Easily and without leaving any trace between the two resin layers,Resin base layer made of thermosetting resin12b or
Can be peeled off.
[0038]
  The detailed configuration of the tube 10 of the present invention shown in FIG. 3 (B) is described in the following Table 2 together with its modification.
  In the preferred embodiment of FIG. 3B, the resin layer to be reduced is primarily a thermoplastic resin.Resin protective layer12p. That is, when heat sealing the bottom inner wall 11i of the metal tube container 10, as a result of the thermoplastic resin moving to a flowable state at the time of folding, it receives squeezing action and leaks from the bottom end opening 11v. It is because the resin to be released is limited to the thermoplastic resin.
[0039]
  But with some need,Resin base layerIt is possible to reduce 12b as well. Example
For example, by this thickness reduction, it is possible to bundle the folded portion so as not to be thin and bulky.
  In FIG. 3A, which is a representative embodiment of the present invention, a thermoplastic resin having sufficient adhesion to the metal layer on the inner wall 7ai side of the body portion 10 of the metal tube container 10 made of aluminum or the like. From
RukiFat layer12 is formed directly. On the other hand, in the embodiment (classification number (6) -1) shown in FIG. 3 (B) which is another different embodiment, in the tube container 10, first, the metal inner wall 7ai is attached to the body inner wall 7ai.
Adhesive thermosetting resinResin base layer consisting ofForm 12b, and after its curing on its surface,
Resin base layerThermoplastic resin that is difficult to adhere toResin protective layerForming 12p
The composite (layered) tree can sufficiently protect the contents even at the time of breakage or breakage of the trunk 7a byFat layerYou can also create twelve.
[0040]
  In each of the above-mentioned embodiments (classification numbers "(6) -1, (6) -3 and (6) -4" in Table 2), the metal body inner wall
The case where thermoplastic resin has sufficient adhesiveness to 7ai is described as an example. However, conversely, even in the case where the thermoplastic resin has almost no adhesiveness to the metal layer (classification number (6) -2), both the metal layer and the thermoplastic resin layer 12 can be obtained. Has sufficient adhesion
An adhesion imparting layer (ASL) comprising an intermediate material, for example, in the form of an adhesive strip, as described above on the surface of the metal layer
Cover the appropriate places and cover eachComposite (multilayer)Of course, the embodiment in which the resin layer 12 is coated is also included in any of the embodiments illustrated in FIG. 3 (A) and FIG. 3 (B) of the present invention. That is, even this embodiment is included in the configuration of the present invention described above and can exert the effects of the present invention. Of course, a thermosetting resin having sufficient adhesiveness to the thermoplastic resin layer 12 may be used to form the adhesive strip in the embodiment of FIG. 3 (A) or FIG. 3 (B).
[0041]
  In FIG. 3A (classification number (5) -1), as long as the thickness of the thermoplastic resin layer positioned on the inner wall 11i of the skirt is reduced, the most part is adhered to the inner wall 7ai of the trunk. The embodiment which belongs is also within the scope of the present invention, and further, the embodiment in which the entire surface is adhered is also located in the outer edge area of the scope of the present invention.
    <Fixed mouth neck and / or shoulder inner wall>
  In the preferred embodiment of the present invention, as summarized in FIG. 4, FIGS. 4A and 4B are examples showing still another embodiment. Here, each aspect (in Table 2) representatively shown in FIG. 4 (A) and FIG. 4 (B).
Classification number “(7) -1 to (7) -4” and classification number “(8) -1 to (8) -4” in Table 2 are composite (overlapping) treesOil
layer12, a specific area on the surface of the metal layer is requiredPairMetal adhesive thermosetting resinResin base layer consisting ofThermoplastic resin which is coated with 12b and hard to adhere to the thermosetting resin layer 12b on the surface thereofResin protective layer12pIs coveredIt is an improvement of the mounted aspect.
[0042]
  The detailed configuration of the tube of the present invention shown in FIG. 4 (A) is described in the following Table 2 together with its variation.
  The aspect typically shown in FIG. 4 (A) (classification numbers “(7) -1 to (7) -4” in Table 2)Is a pairMetal adhesive thermosetting resinResin base layer consisting of12 b is placed on the inner wall 7 ai of the metal tube container 10.
10 to the lower end of the neck inner wall 7ni from the skirt inner wall 11i through the shoulder inner wall 7si.
Thermoplastic resin which is coated to form a resin base layer 12b in a bonded form with sufficient strength, and which is difficult to bond on the surface of the resin base layer 12b.Resin protective layerThis resin protection is overlaid with 12p
The layer 12p covers not only the layer 12p but also the inner wall 7ni of the oral cervix, so that the layer 7p is firmly adhered to the inner wall 7ni.
This is a fixed mode. In the embodiment of FIG. 4 (A),Resin protective layer12p is a tube container
It is fixed only with a sufficiently large adhesive force to the 10 mouth neck inner wall 7ni,Resin base layerTo 12b
It is only temporary wearing.
[0043]
  The embodiment (classification number “(8) -1 to (8) -4” in Table 2) representatively shown in FIG. 4 (B) is a resin base layer and is a thermosetting resin with metal adhesion to metal.Resin base layer consisting of12 b is the inner wall of the body of the metal tube 10
7ai covers from the skirt inner wall 11i to the lower end of the shoulder inner wall 7si, and
Thermoplastic resin that is difficult to adhere toResin protective layer12p is overlaid and thisResin protection
layer12p covers not only the shoulder inner wall 7si but also the oral and cervical inner wall 7ni.
It is the aspect currently adhesively fixed to these inner walls.
[0044]
  The detailed configuration of the tube container 10 of the present invention shown in FIG. 4 (B) can be modified as shown in Table 2 below.
It is described along with the embodiment.
  In the embodiment of FIG. 4 (B) (classification number “(8) -1”), a thermoplastic resinResin protective layer1
2p is a sufficiently large adhesive force to the shoulder inner wall 7si of the tube container 10 and the neck inner wall 7ni
It is fixed only by the combined use of similar adhesion toResin base layerIt is only temporary wearing on 12b
Yes.
[0045]
  According to the layering method of FIG. 4 (A) and FIG. 4 (B),Resin protective layerInner cylinder or inner formed of 12p
The bag can be applied to the tube container 10 by various mechanical external forces.Resin base layer12b from the surface
The contribution of partial exfoliation prevents most of the effects of bending, twisting, piercing, breaking, etc. by external force applied to the container 10 from being directly affected. As a result, it can be expected that the inner cylinder or the inner bag is totally healthy and protects the contents from coming into contact with the outside, and it can be expected to prevent most situations such as accidental leakage to the outside. . In addition, the shoulder 7s of the tube container 10
And the mouth and neck 7n can be expected to be the site where deformation by the above-mentioned external force is the least likely to occur.
.
[0046]
  In the above-mentioned embodiment (classification numbers “(7) -1, (7) -3 and (7) -4” in Table 2), the thermoplastic resin layer 12 is sufficient for the inner wall 7ai of the metal layer forming the body 7a. The case where it has a certain adhesiveness is described as an example. However, conversely, even when the thermoplastic resin layer 12 has little adhesion to the metal layer (classification number “(7) -2” in Table 2), the metal layer and the thermoplasticity On both sides of resin layer 12
An adhesive application layer (ASL) made of a material having sufficient adhesiveness to
It is a matter of course that the embodiment is applied to the metal layer surface appropriately in the above-described manner as described above, and the respective portions are covered so as to cover the thermoplastic resin layer of the continuous layer. It is included in the aspect of (B). That is, even in this embodiment (classification number “(7) -2”), the above configuration according to the present invention is
It is because it is included and can express the effect of the present invention.
[0047]
  Furthermore, each aspect of FIG. 4 (A) and FIG. 4 (B) (classification number “(7) -1 to (7) -4” in Table 2) and Table 2
Classification number "(8) -1 to (8) -4") is a thermoplastic resinResin protective layerA mode (not shown) in which 12p is strongly adhered and fixed only to the shoulder inner wall 7si of the tube container 10 is also included.
    <Deformation mode>
  As a modified embodiment of FIG. 4 (generic name), the thermoplastic resin layer 12p is a preferred embodiment of FIG.
Needless to say, it is possible to increase or decrease the thickness of the resin layer on the bottom inner wall 11i without being fixed by at least one selected from the neck inner wall 7ni and the shoulder inner wall 7si. That is,
Preferred embodiment of FIG. 4 (A) and FIG. 4 (B) (classification number “(7) -1 to (7) -4” in Table 2) and classification in Table 2
In the numbers “(8) -1 to (8) -4”), the thickness increasing modes similar to those in FIG. 2 (A) and FIG. (3) -4 and the classification numbers "(4) -1 to (4) -4" in Table 1 are also shown in FIG.
Thickness reduction specifications similar to those in FIG. 3 (B) (classification numbers “(5) -1 to (5) -4” in Table 2) and in Table 2
The classification numbers “(6) -1 to (6) -4”) can also be combined (superposed). These optional specifications are included
The effect to give is also the same as that in each figure of the above.
[0048]
  One example of a variation of the preferred embodiment of the present invention, which is summarized in FIG. 5, is shown in FIG.
A thickened embodiment is combined with the embodiment of A), and another example is as shown in FIG. 5 (B).
The thinning mode is combined with the mode of 4 (B).
  The detailed configuration of the tube 10 of the present invention shown in FIG. 5 (A) is described in the following Table 3 together with its modification.
[0049]
  According to each aspect (classification number “(9) -1 to (9) -4” in Table 3) representatively illustrated in FIG. 5 (A), an inner cylinder (inner bag) made of thermoplastic resin Is fixed by sufficient adhesion with the neck inner wall 7ni, and the seal (non-interlayer fusion seal) in the skirt 11 only generates the (internal) gas generated from the contents in the tube container 10 It is possible to enjoy the effect of discharging by leakage, that is, the effect of effectively preventing the burst due to the increase in the internal pressure of the tube container 10.
[0050]
  The detailed configuration of the tube of the present invention shown in FIG. 5 (B) is described in the following Table 3 together with its variation.
  Each aspect (classification number "(10) -1 to (10) -4" in Table 3) representatively illustrated in FIG. 5 (B); where (10) is "10" in a circle. It is a substitute for the written notation. (2 numbers in parentheses)
The same applies to the case where the inner cylinder (inner bag) made of thermoplastic resin is the inner
The internal gas is leaked out of the tube container 10 by the seal (non-interlayer fusion seal) which is more stably fixed by the adhesive force to both of the shoulder inner wall 7si and by the fold only seal in the skirt 11 of the tube container 10 It is possible to achieve the effect of effectively preventing the rupture due to the increase in the internal pressure of the tube container 10 by discharging.
[0051]
  A thermosetting resin with metal adhesion to the inner wall 7 ai of the metal tube container 10.Resin base layer consisting of12b and thermoplastic resinResin protective layerWhen forming a composite (overlayer) resin layer 12 consisting of 12p,Resin base layerOn the surface of 12bResin protective layerSimply covering 12p results in poor adhesion between the two layers.Resin protective layer12p is detached (peeled off).
[0052]
  Thermosetting resin as a measure to prevent this detachmentResin base layer consisting of12b made of extrusion metal
Depending on the application of the tube container 10, only the necessary portion on the inner wall 7ai of the body is covered (coated
Coated and formed with metal adhesionResin base layerThermoplastic tree to cover the top of 12b
OilResin protective layerAn inner bag-like container consisting of 12p can also be covered. here,resin
Protective layer12p is not partial, and is formed to form an inner bag-like container consisting of a continuous layer.
As described above, a thermosetting resin having a metal-adhesive property partially on the inner wall 7ai of the metal tube container 10 in the direction substantially orthogonal to the long axis X thereof.Resin protective layerIf you wear 12b,Resin protective layer1
2p isResin base layerEven if it is difficult to bond to 12b,Resin protective layer 12pDirectly on the body inner wall 7ai
It is a contribution that the part to adhere to is left to the required degree,Resin protective layer12p completely dropped out or emerged
This partial adhesion is the state desired in the embodiment of FIG.
[0053]
  In the embodiment (classification numbers “(11) -1 to (11) -4” in Table 3) representatively illustrated in FIG. 6 (A), the mouth and neck portion is provided on the body inner wall 7ai of the metal tube container 10. 7n inner wall7 niHeat resistance to metal adhesion leaving
Curable resinResin base layer consisting of12b is coated on top of which thermoplastic resinResin consisting of
Protective layer12p is fixed including the inner wall of the neck 7n. thisResin protective layer12p is the skirt
Thermoplastic resin which has been reduced in thickness by 11i and melted at the time of subsequent heat sealing is a tube 10
Leakage is prevented from the tail end opening 11v.
[0054]
  The detailed configuration of the tube of the present invention shown in FIG. 6 (A) is described in the following Table 3 together with its variation.
  The above “partially in the direction substantially orthogonal to the major axis X” means “horizontal stripes” with respect to the major axis X
Not limited to the specification in which a plurality of strips of thermosetting resin are individually covered in
Also included is a specification in which a strip of thermosetting resin to metal adhesion is coated in series on the surface of the inner wall 7ai of the body in a spiral pattern.
[0055]
  Each of the above-mentioned embodiments (classification numbers "(11) -1, (11) -3 and (11) -4" in Table 3) is a body formed of a metal layer7aThe case where the thermoplastic resin has sufficient adhesion to the inner wall 7ai is described as an example.
ing. However, conversely, even when the thermoplastic resin has little adhesion to the metal layer (classification number “(11) -2” in Table 3), the metal layer andResin protective layerFor both 12p
An adhesion-imparting layer (ASL) consisting of an intermediate material with sufficient adhesion, for example in the form of adhesive strips
As a matter of course, as shown in FIG. 5A of the present invention, the resin protective layer 12p of the continuous layer is coated so as to cover the appropriate portions as described above on the surface of the metal layer. In each aspect of FIG. 5 (B)
It is included. That is, even in this embodiment (classification number “(11) -2” in Table 3),
It is because it is included in the configuration of the present invention and can exert the effects of the present invention.
[0056]
  The detailed configuration of the tube of the present invention illustrated in FIG. 6 (B) is described in the following Table 3 together with its variation.
  The present invention typically illustrated in FIG. 6 (B)Gold ofGeneric tube container 10ThenThermosetting resin with metal adhesionResin base layer consisting ofA shoulder at the inner wall of the tube container 10 by 12bInside
wallIt covers up to the inner wall 7ai of the trunk which contacts the lower edge of 7si.
[0057]
  First of all, the thermoplastic resin layer 12 p forms the tube container 10, and the metal opening neck inner wall 7 ni
The aspect (classification number "(12) -1, (12) -3 and (12) -4" in Table 3) adhering to the shoulder inner wall 7si will be described. In these embodiments, the thermoplastic resinThe resin protective layer 12p made of
Form thisThe inner cylinder has almost no risk of falling off from the mouth inner wall 7 ni and the shoulder inner wall 7 si of the tube container 10. In these modes, a thermosetting resin with metal adhesion which is coated on the inner wall 7ai of the body of the tube container 10Resin base layer consisting of12b adheres to the body inner wall 7ai
Aspect and thermoplastic resinResin protective layer12p isResin base layerSelect the mode of sticking to 12b. Thermoplastic resin in each aspect of FIG. 6 (B)Resin protective layer12p is
The thickness of the bottom inner wall 11i of the inner layer 11i is reduced.
Prevents the molten thermoplastic resin from leaking out of the skirt end opening 11v
Ru.
[0058]
  In addition, the body inner wall 7ai of the tube main body 7Resin base layerWith 12bResin protective layerCompound consisting of 12p(Multilayer)TreeFat layerWhen forming 12Resin base layerOn the surface of 12bResin protective layerCovering 12p can lead to poor adhesion between the two layers.
  As a measure against this interlayer adhesion, a thermosetting resin with metal adhesion is coated (coated; coated) only on the necessary part on the inner wall according to the application of the metal tube container 10 for extrusion.
,Been formedResin base layerAn inner bag-like container consisting of a thermoplastic resin coating layer 12p can also be coated so as to cover them on 12b. As this thermoplastic resin, it is difficult to adhere to a thermosetting resin, but select one that can adhere to a metal layer with sufficient strength, andResin protective layer12p is not partial but continuously forms an inner bag-like container. In this way, metal chew
Thermosetting resin partially adhesive to metal on the inner wall of the container 10Resin base layer consisting ofCover 12b
if,Resin protective layer12p isResin base layerEven when it is difficult to bond to 12b,Resin protective layerWith the contribution that 12p moderately has a part that directly adheres to the metal tube body 7,Resin protective layer1
It is possible to prevent complete detachment or lifting (free) of 2p.
[0059]
    <Description of powder coating and its apparatus>
  The electrostatic powder coating (powder coating) apparatus suitably used in the preferred embodiment 7 of the present invention will be described below.
  As shown in FIG. 7, the body 7a of the uncoated material metal tube 7 is rotatable.
The mouth neck outer wall is gripped over substantially the entire circumference by the tube holder 25 which is a tube support mechanism, and the body 7a is grounded via the tube holder 25.
[0060]
  Furthermore, in the body 7a of the tube, the electric field forming electrode 21 is arbitrarily positioned in the long axis X direction.
It is inserted so that it can occupy, and the potential difference (voltage) required for electrostatic powder coating is applied to this.
  Therefore, in this electrostatic powder coating apparatus, a strong electric field is formed from the electrode 21 toward the body inner wall 7ai of the metal tube 7 by the application of a potential difference. In this state, while the tube holder 25 is rotated at a predetermined speed by a driving force from a prime mover (not shown), for example, an electric motor, the powder paint is jetted to the inner wall of the tube through the powder paint jet nozzle 22. The ejected powder coating material is electrostatically attracted immediately to the inner wall 7ai of the barrel and uniformly adhered. Here, the paint powder which has not been deposited is recovered by a suction recovery mechanism (not shown) located downstream with respect to the ejection direction. The powder paint collected is an electrode of opposite potential or a ground electrode, etc.
By proximity, the charge can be reused after being neutralized as an electrostatic powder coating.
[0061]
  In order to form a coating film from the powder coating electrostatically adsorbed on the inner wall of the tube, it is useful to retain the coating film in a heating furnace or a hot air furnace set at a predetermined temperature for a predetermined time. Here, the average temperature in the furnace or hot stove should be set to a temperature sufficient to melt or bake the powder coating used.
  As a preferred example as shown in FIG. 7, by using an electrostatic powder coating apparatus, a uniform tree free of defects (defects) such as pinholes is obtained.Fat layerCan be formed in a short time with a sufficient layer thickness to produce the metal tube container for extrusion of the present invention.
[0062]
  When the thermoplastic resin layer 12 has sufficient adhesion to the inner wall 7ai of the metal tube 10 in the various aspects described above, the thickness of the inner wall 7ai of the inner portion of the body is adjusted in order to adjust the interlayer adhesion. In order to coat an adhesion preventing layer (AIL) at a predetermined place or when the thermoplastic resin layer 12 has almost no adhesiveness to the body inner wall 7ai of the metal tube 10, an interlayer adhesive force is applied.
If there is a purpose to coat the adhesion imparting layer (ASL) on a predetermined part of the inner wall 7ai of the body in order to
Prior to introducing the tube 7 into the electrostatic powder coating apparatus, the adhesion preventing layer (AIL) and / or the adhesion layer (ASL) are pre-coated on the inner wall 7ai etc. of the metal tube 7 That is the premise.
[0063]
  As a method or means for performing this preliminary coating, a spray coating method (spray coating apparatus), a roll coater (gravure coater or the like), a brush coating method, or the like can be appropriately selected. Among them, the spray coating method (spray coating apparatus) and roll coater (gravure coater etc.) are superior in view of productivity and the like.
  When the resin forming the adhesion preventing layer (AIL) and / or the adhesion imparting layer (ASL) used for pre-coating is a thermosetting resin, the thermosetting resin layer is first coated after pre-coating. Alternatively, when it is cured by other curing means, the above-described system for electrostatic powder coating is commonly used while curing or after curing. For the purpose of shortening the working time, it is also possible to adopt a method of precoating the thermosetting resin in the form of a prepolymer and shortening the curing time.
[0064]
【Effect of the invention】
  As explained above, the metal tube container for extrusion according to the present invention exhibits the following effects:
(1) A thermoplastic resin adhesive is applied to the inner wall of at least one of the mouth neck portion, the shoulder portion and the body portion of the metal tube container, and the thermoplastic resin layer is formed on the other portions. The loose aspect is less susceptible to cracks, tears or breaks in the tube container, so the contents can be preserved without being kept in contact with the environment;
(2) A thermosetting resin with metal adhesion is coated as a resin base layer on at least one of the inner walls selected from the mouth neck portion, the shoulder portion and the body portion of the metal tube container, and the resin base layer is formed thereon Since the thermoplastic resin in the form of a continuous layer formed a protective layer in the form of a continuous layer is difficult to be affected by cracks, tears or breaks in the tube container, the contents can be preserved without contacting with the environment. ;
(3) While the thermoplastic resin layer is partially coated in an adhesive state on the inner wall of the metal tube container, the form in which the vicinity of the skirt end of the resin layer is particularly thick is that the skirt is folded and sealed Even by itself, intrusion of outside air can be prevented, and the rise in internal pressure due to internal gas generated later can be eliminated by leakage from the seal;
(4) The thermoplastic resin layer coated on the resin base layer made of a thermosetting resin with metal adhesiveness is coated on the inner wall of the metal tube container for extrusion, and the resin base layer hardly adheres to the resin base layer. The embodiment in which the end of the skirt is formed sufficiently thick prevents intrusion of the outside air even when the skirt is folded and sealed, and the rise in internal pressure due to the internal gas generated later can be eliminated by the leakage from the seal.
. Specifically, the metal tube container is useful for containing medicines, hair setting agents, hair dyes, cosmetics, food or food and the like;
(5) While the thermoplastic resin layer is partially coated in an adhesive state on the inner wall of the metal tube container, the bottom of the end of the resin layer is thin (the thickness reduction aspect). Can prevent fluidization resin from leaking out of the skirt end when heat sealed;
(6) The thermoplastic resin layer coated on the resin base layer made of a thermosetting resin bonded to the inner wall of the metal tube container for extrusion is difficult to adhere to the resin base layer, and the tail end vicinity is rather thin The formed aspect (thickness reduction aspect) can prevent the fluidization resin from leaking out from the end of the skirt when the skirt is heat-sealed;
(7) A thermosetting resin adhesive to the metal layer is coated as a resin base layer on at least one of the inner walls selected from the neck and shoulder of the metal tube container, and the resin base layer is coated thereon It is difficult to adhere, and the aspect in which the adhesive thermoplastic resin forms a protective layer in the form of a continuous layer on the metal layer is free from the inner wall of the body of the tube container. As it is not easily affected by breakage or the like, the contents can be preserved without being in contact with the outside world.
[0065]
[Table 1]
[0066]
【Table 2】
[0067]
[Table 3]
Brief Description of the Drawings
    [Fig. 1]
  The embodiment summarized in FIG. 1 is a schematic vertical cross-sectional view of a metal tube container for extrusion illustrating the preferred embodiment of the present invention, and describes a resin layer coated on the inner wall of the container.
FIG. 1 (A) shows a mode in which a single layer of thermoplastic resin is adhered and fixed at a predetermined place on the inner wall of the body of the tube container, and FIG. 1 (B) shows a thermosetting resin first on the metal layer of the tube.Resin base layer consisting ofIs intermittently coated on the surface of the thermoplastic resinResin protective layerIt is the aspect mounted.
    [Fig. 2]
  The embodiment summarized in FIG. 2 is a metal tube container for extrusion illustrating the preferred embodiment of the present invention, in which the resin layer coated on the inner wall of the trunk is thickened toward the end of the skirt. Vertical cross-sectional view. FIG. 2 (A) shows an embodiment in which only the thermoplastic resin layer is coated on the inner wall of the body, and FIG.
B) is coated with a resin base layer of thermosetting resin on any part of the inner wall of the trunk, and thermoplasticity is applied on the surface
resinResin protective layerIt is the aspect currently covered.
    [Fig. 3]
  In the embodiment outlined in FIG. 3, in the metal tube container for extrusion illustrating the preferred embodiment of the present invention, the resin layer coated on the inner wall of the body is schematically reduced in thickness toward the end of the skirt. Vertical cross-sectional view. FIG. 3 (A) shows an embodiment in which only the thermoplastic resin layer is coated on the inner wall of the body, and FIG.
B) is coated with a resin base layer of thermosetting resin on any part of the inner wall of the trunk, and thermoplasticity is applied on the surface
resinResin protective layerIt shows an aspect of being covered.
    [Fig. 4]
  The embodiment summarized in FIG. 4 is a schematic vertical cross-sectional view of the metal tube container for extrusion illustrating the preferred embodiment of the present invention, and illustrates the form in which the resin layer is coated on the inner wall of the barrel of the container. . Figure 4 (
A) The resin base layer made of a thermosetting resin covers the inner wall of the barrel of the container to the lower end of the neck, and
Thermoplastic resin on the surfaceResin protective layerShows a mode in which the inner wall of the body of the tube container is almost covered, and FIG. 4 (B) shows a thermosetting resin coated on the metal layer of the tube.Resin base layer consisting ofIs covered up to the lower end of the shoulder of the inner wall of the body, and the thermoplastic resin isResin protective layerShows a mode in which the inner wall of the trunk is almost covered.
    [Fig. 5]
  The embodiment summarized in FIG. 5 is a schematic vertical cross-sectional view of a metal tube container for extrusion illustrating the preferred embodiment of the present invention, wherein a resin layer is coated on the inner wall of the body of the container, and The thickening is illustrated. In FIG. 5A, a resin base layer made of a thermosetting resin covers the inner wall of the body of the container up to the lower end of the mouth and neck portion, and a thermoplastic resin is formed on the surface of the resin base layer.Resin protective layerCovers almost the inner wall of the body of the tube container andResin protective layerShows a thickened embodiment, and FIG. 5 (B) shows a thermosetting resin coated on the metal layer of the tube.Resin base layer consisting ofIs covered up to the lower end of the shoulder of the inner wall of the body, and the thermoplastic resin isResin protective layerCovers most of the inner wall of the body, and at the inner wall of the skirt toward the end of the skirtResin protective layerShows an embodiment in which the thickness is increased.
    [Fig. 6]
  6 is a schematic vertical cross-sectional view of a metal tube container for extrusion illustrating the preferred embodiment of the present invention, and illustrates an embodiment in which a resin layer is coated on the inner wall of the body of the container. . Figure 6 (
A) The resin base layer made of a thermosetting resin covers the inner wall of the barrel of the container to the lower end of the neck, and
Thermoplastic resin on the surfaceResin protective layerCovers most of the inner wall of the body of the tube container, whileResin protective layerFIG. 6 (B) shows the thermosetting resin coated on the metal layer of the tube.Resin base layer consisting ofIs covered up to the lower end of the shoulder of the inner wall of the body, and the thermoplastic resin isResin protective layerCovers most of the inner wall of the body, and at the inner wall of the skirt toward the end of the skirtResin protective layerIndicates a mode in which the thickness is reduced.
    [Fig. 7]
  FIG. 7 is a schematic vertical sectional view showing an example of an electrostatic powder coating apparatus suitable for carrying out the electrostatic powder coating method suitably used in each of the preferred embodiments of the present invention.
    [Description of the code]
7 material metal tube (not completed as a container)
8 Upper opening of neck
10 Metal tube container for extrusion
11 Hem of metal tube container for extrusion
12 Single resin layer, composite (multilayer) treeFat layer
21 Electric field forming electrode
22 Powder paint spray nozzle
25 tube holder
7a Torso (from the shoulder to the end of the skirt, excluding the neck)
Thread for crown screwing 7m cap
7n Mouth and neck
7s shoulder
11i bottom inner wall
11v Hem end opening
11z bottom end (tail end)
12bResin base layer made of thermosetting resin
12pResin protective layer made of thermoplastic resin
7ai body inner wall
7nx mouth neck outer wall
7si shoulder inner wall
AIL anti-adhesion layer
ASL adhesion layer
CST spiral stripe type
TST tiger stripe type