The tearable mouth packaging bag
Technical field
The present invention relates to a kind of tearable mouth packaging bag, belong to field of product packaging.
Background technology
The current packaging bag, especially frivolous polypropylene material packaging bag is widely used in fields such as toilet article packaging, packaging for foodstuff, for daily life provides convenience.
The packaging bag of using at present often is divided into two kinds of sealed type and non-tight formulas, and the packaging bag of non-tight formula all is comparatively regular project organization generally, comprises that double-layer films and this double-layer films fit fully; There is not to set about the place of tearing; Often need user's two palmistrys to packaging bag is rubbed, the double-layer films of fitting so fully will be separated and staggered floor occur, opens the package through both hands pulling film then; Often time-consuming effort is again used inconvenient.
The sealed package bag then is in order to guarantee packaging bag content and extraneous completely cutting off better; Often will carry out seal to the packaging bag sack handles; After the seal processing, stay the sack edge of certain altitude on sack top, during use; Two edges that need to hold sack are torn sack towards the application of force.But usually the problem of appearance is, the application of force is too big, and sack has been torn to be out of shape still and but really do not opened, and can't take out a bag content.
In order to solve the problems of the technologies described above; Disclosed a kind of quality seal bag design among the Chinese patent document CN2491365Y, sealing bag comprise the sealing band that is arranged on the sealing bag sack, be used for sealing band top is played the seal limit of enhanced leaktightness effect, also further is provided with tearing port.This technology has guaranteed that through being provided with of tearing port the user can split seal limit and packaging bag body branch through the tearing port application of force, thereby packaging bag is opened.But, above-mentioned set-up mode because sealing band need be set, the seal limit also has tearing port, thereby improved packing cost greatly.
In addition; This technology for tearing port that requirement is set is very strict; Require tearing port to have to be suitable for the breach position of directly tearing after the application of force, the angle setting of this and breach has direct relation, in case be provided with accurate inadequately; Can't packaging bag be torn through tearing port, and bring inconvenience for user's use.。
Summary of the invention
First technical matters to be solved by this invention is that use is torn in packaging bag of the prior art for ease; Sealing band need be set, the seal limit also has tearing port; Second technical matters that the present invention will solve simultaneously is that packaging bag of the prior art is had relatively high expectations for the accuracy rate that is provided with of tearing port; In case be provided with unreasonablely, will cause destroying after the application of force problem of tearing port, and then provide a kind of and need not to be provided with tearing port and promptly can be easy to open and packaging bag with low cost.
For realizing above-mentioned purpose, the invention provides a kind of tearable mouth packaging bag, comprise the packaging bag body, said packaging bag body is carried out leak free tooled joint limit; Independently control flange for two that outside the tooled joint limit of said at least one side, extend the setting of wrong position, the said two-layer flange of controlling has the zone of coincidence.
Extension is provided with two-layer extension edge outside the tooled joint limit of said at least one side, and further elongation moulding has the said flange of controlling on every layer of said extension edge.
The said flange of controlling is an arc.
Each said flange vertex of controlling flange shifts to install.
Said coincidence zone is said at least 1/3 of the flange length of controlling.
Two flange vertexs of controlling flange are symmetrical set with the intersection point place longitudinal axis of two said flanges.
Each said flange and said this body by integral forming of packaging bag of controlling.
Tearable mouth packaging bag of the present invention has following advantage with respect to prior art:
First; Tearable mouth packaging bag of the present invention; Comprise the packaging bag body, the packaging bag body is carried out leak free tooled joint limit; Also outside the tooled joint limit of at least one side, extend with respect to prior art packaging bag of the present invention and to be provided with the two-layer flange of controlling that shifts to install, provide the user when the application of force is carried out in packaging bag, conveniently to pinch the application of force place that handle is held like this; The present invention also further defines the two-layer flange of controlling and has the zone of coincidence; Preferred said coincidence zone is said at least 1/3 of the flange length of controlling; Force in when controlling flange as the user like this; Can strength be concentrated on and overlap the zone, thereby strength further concentrated on the said regional corresponding tooled joint place that overlaps tooled joint is torn, and then packaging bag is opened through being applied to the power of controlling on the flange.Packaging bag of the present invention need not to be provided with tearing port with respect to prior art, promptly can with packaging bag easily the application of force open, make simple and with low cost simultaneously.
The second, tearable mouth packaging bag of the present invention, extension is equipped with two-layer extension edge outside the tooled joint limit of said at least one side, and further elongation moulding has the said flange of controlling on every layer of said extension edge.That is to say; Extension edge is the extendible portion of packaging bag body; Control flange and then extend and be arranged on the extension edge, further like this guaranteed that the user forces in when controlling flange, extension edge that can the strength passage area is bigger further acts on the tooled joint limit; Thereby the tooled joint limit is stably torn, avoid causing packaging bag application of force place to damage after the application of force.
Description of drawings
For content of the present invention is more clearly understood, below according to a particular embodiment of the invention and combine accompanying drawing, the present invention is done further detailed explanation, wherein,
Fig. 1 is the structural representation of tearable mouth packaging bag according to the invention.
Reference numeral is expressed as among the figure: 1-packaging bag body, and 2-tooled joint limit, 3-controls flange, 4-flange, 5-intersection point.
The specific embodiment
Below will combine accompanying drawing, tearable mouth packaging bag of the present invention further set forth in conjunction with following examples.
The structure of tearable mouth packaging bag of the present invention is as shown in Figure 1, and it comprises packaging bag body 1, and said packaging bag body 1 is carried out leak free tooled joint limit 2.Packages sealed bag body 1 can be provided with a tooled joint limit 2, and two, three tooled joint limits 2 also can be set.Outside the tooled joint limit 2 of at least one side, extend two that wrong position is provided with and independently control flange 3 respectively, each is said, and to control flange 3 one-body molded with said packaging bag body 1, and said two are controlled flange 3 and have the zone of coincidence.Wherein, the said flange 3 of controlling can be set to shapes such as arc, semicircle, waveform, serration, rectangle as required; In the present embodiment, the said flange 3 of controlling is set and is arc.Said coincidence zone can be carried out the selection setting of area size as required, is said at least 1/3 of flange 3 length of controlling such as selecting that said coincidences zone is set, and comprises that selection is provided with two and controls flange 3 and overlap fully.Why the length that overlaps the zone is set; Be too little or overlap regional because the length in this coincidences zone is set; Then after the application of force, cause strength can't concentrate the coincidence zone and make point of application place be out of shape more easily, can't said tooled joint limit 2 be opened on the contrary because of tearing of both direction.Need to prove, control flange 3 length and refer to said the longest length of controlling flange 3.
As further preferred embodiment, tearable mouth packaging bag of the present invention is extended outside the tooled joint limit 2 of said at least one side and is provided with two-layer extension edge, and further elongation moulding has the said flange 3 of controlling on every layer of said extension edge.
On the foregoing description basis,, can select to be set to each said flange 4 vertex of controlling flange 3 and shift to install for said setting of controlling flange 3.This shifts to install can select flange 4 to misplace a little, perhaps selects two flange 4 vertexs of controlling flange 3 to be symmetrical set with the intersection point 5 place longitudinal axis of two said flanges 4.
When packaging bag of the present invention is used; The user pinches said two and controls flange 3; And exert oneself toward the outer side simultaneously; Strength put on said control the tooled joint place that flange 3 links to each other through forcing in the said flange 3 of controlling, thus the two-layer packaging bag after the tooled joint place handled by tooled joint tear, thereby packaging bag is opened.
Obviously, the foregoing description only be for explanation clearly done for example, and be not qualification to embodiment.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here need not also can't give exhaustive to all embodiments.And conspicuous variation of being extended out thus or change still are among protection scope of the present invention.