Manufacturing the seal a letter method and system of adhesive tape and the adhesive tape of sealing a letter that forms with this method
Technical field
The invention relates to a kind of manufacturing the seal a letter method and system of adhesive tape and the adhesive tape of sealing a letter that uses this method to form, particularly about a kind of bobbin composite volume type the seal a letter method and system of adhesive tape and formed adhesive tape of sealing a letter of this method of use made.
Background technology
The adhesive tape (Sealing Tape) of sealing a letter is used for can installing such as plastics bag etc. the bag of article, for repeatedly tearing/the sealing of this bag of involution, prevents that whereby the built-in article of this bag from sealing from it.
As shown in Figure 1 and Figure 2, the existing adhesive tape 100 of sealing a letter comprises parting agent layer 110, tears film 120, first adhesive layer 130, adhesive layer carrier 140 and second adhesive layer 150.Generalized case, this adhesive tape of sealing a letter forms first adhesive layer 130 and second adhesive layer 150 the apparent surface of this adhesive layer carrier 140 at first respectively; Then, the adhesive layer carrier 140 that will be formed with first and second adhesive layer again conforms to and tears the apparent surface that film 120 is not formed with parting agent layer 110; At last, cut itemize, adhesive tape is cut into preset width, utilize the mode that repeats to reel again, form discoid unit 10.
Yet adhesive tape has two-layer adhesive layer because this kind sealed a letter, and except the processing procedure complexity, also can improve production cost; On the other hand, the thickness of the made adhesive tape of sealing a letter is thicker and take up space.For this reason, the someone proposes internal layer adjacent and the outer partly overlapping spool-type winding-structure that pastes.
But the adhesive tape of this kind spool-type all is to repeat earlier to reel to form discoid unit 10, passes through the uncoiling step again, utilizes another bobbin rewinding machine to carry out the bobbin rewinding.And in the winding-structure of this kind bobbin rewinding, because the adhesive layer of adhesive tape can directly paste to the seam crossing of internal layer adhesive tape, thereby the situation of the colloid seepage flow that adhesive layer takes place easily to the slit.
Therefore there is the people to propose to increase another thin film layer between the outside of and internal layer adjacent adhesive tape inboard, avoids adhesive layer directly to paste, to solve above-mentioned strike-through problem to the seam crossing of internal layer adhesive tape at the adhesive layer of the outer adhesive tape of winding-structure.But this kind method not only needs to change processing procedure, makes process complexity increase and the production cost raising, and the required processing procedure time is also longer, and finished-product volume and thickness are increased, and occupies bigger parking space, therefore, still mass production manufacturing and commercialization at large continuously.
Therefore, still need a kind of situation that can overcome above-mentioned colloid seepage flow, and can not increase the complicacy of processing procedure and the adhesive tape method for making of cost.
Summary of the invention
For overcoming the shortcoming of above-mentioned prior art, main purpose of the present invention is to provide a kind of method of making the adhesive tape of sealing a letter of bobbin composite volume type.
A further object of the present invention is to provide a kind of method of making the adhesive tape of sealing a letter of bobbin composite volume type serially.
Another object of the present invention is to provide a kind of seal a letter system of adhesive tape of bobbin composite volume type that makes.
Another purpose of the present invention is to provide a kind of bobbin composite volume type that is used for plastics adhesive tape of sealing a letter.
Of the present invention again when a purpose is to provide a kind of uncoiling to use again, the residual bobbin composite volume type of the colloid adhesive tape of sealing a letter can not take place.
For reaching above-mentioned and other purpose, the seal a letter method of adhesive tape of manufacturing provided by the invention comprises the following steps: to prepare the peelable film substrate with preset width, this film substrate has first surface and opposing second surface, and the side surface that connects this first surface and this second surface; The second surface of this film substrate forms adhesive layer again, and this adhesive layer is for the clinging power of this film substrate second surface, greater than the clinging power of this adhesive layer for this film substrate first surface and side surface; And after this adhesive layer forms, be positioned at inboard mode with adhesive layer, and directly carry out the bobbin rewinding, make partly overlapping the pasting of adhesive layer of this skin adhesive tape, thereby form discoid unit to the first surface of the film substrate of internal layer adhesive tape.
In addition, the seal a letter system of adhesive tape of a kind of manufacturing provided by the invention comprises: the itemize module that is used to form the peelable film substrate with preset width; Be used for forming the gluing module of adhesive layer on the surface of this film substrate; And be used for after this adhesive layer forms, directly carrying out the bobbin rewinding and form discoid unitary rewinding module.
Moreover, the present invention provides a kind of adhesive tape of sealing a letter of bobbin composite volume type again, it comprises: have first surface, opposing second surface and connect this first surface and this second surface side surface tear film, and be formed at the adhesive layer that this tears the second surface of film, and this adhesive tape is to be positioned at inboard mode with adhesive layer to carry out rewinding, wherein, be positioned at the overlapping first surface of tearing film that pastes to the internal layer adhesive tape in outer field tape portion ground, and form discoid unit, and this adhesive layer is torn the clinging power of film second surface for this, tears the clinging power of film first surface and side surface greater than this adhesive layer for this.
In sum, because method of the present invention is the itemize step of carrying out film substrate earlier, and after forming, this adhesive layer directly carries out the bobbin rewinding, do not need extra rewinding and uncoiling step, thereby can finish the manufacturing of the adhesive tape of sealing a letter of bobbin composite volume type by the continous way processing procedure, advantage such as have the manufacturing processed of simplification and enhance productivity.
On the other hand, bobbin composite volume type of the present invention is sealed a letter in the adhesive tape, this adhesive layer is torn the clinging power of the second surface of film for this, tear the clinging power of the first surface and the side surface of film greater than this adhesive layer for this, the adhesive layer of adhesive tape can not remain in the first surface of tearing film or the side surface of internal layer adhesive tape when uncoiling uses so this is sealed a letter.
Description of drawings
Fig. 1 is the seal a letter side-view of adhesive tape of general composite volume type;
Fig. 2 is the seal a letter sectional view of adhesive tape of general composite volume type;
Fig. 3 is the method flow diagram of the embodiment of the invention;
Fig. 4 is the system block diagrams of the embodiment of the invention;
Fig. 5 is the synoptic diagram of embodiment of the invention itemize step;
Fig. 6 A, Fig. 6 B are the local structure sectional views of embodiments of the invention gluing step;
Fig. 7 is the synoptic diagram of embodiment of the invention bobbin rewinding; And
Fig. 8 is the seal a letter sectional view of adhesive tape of the bobbin composite volume type of the embodiment of the invention.
Embodiment
Embodiment
Below by certain embodiments explanation embodiments of the present invention.
Fig. 3 is the method flow diagram of the embodiment of the invention, and this method comprises that preparation has the peelable film substrate (step 210) of preset width, forms adhesive layer (step 220) and carry out the bobbin rewinding on this film substrate surface and form discoid unit (step 230).As shown in Figure 4, the present invention also discloses the seal a letter system of adhesive tape of a kind of manufacturing, and this system comprises and is used to carry out step 210, forms the itemize module 310 of the peelable film substrate with preset width; Be used to carry out step 220, form the gluing module 320 of adhesive layer on the surface of this film substrate; And be used to carry out step 230, after this adhesive layer forms, directly carry out the bobbin rewinding and form discoid unitary rewinding module 330.
Fig. 5 is embodiments of the invention, prepares the synoptic diagram of the itemize step of the peelable film substrate 410 with preset width.In this embodiment, use the PE film as peelable film substrate; Wherein, this PE film has first surface 410a, opposing second surface 410b, and the side surface 410c that connects this first surface and this second surface, this first surface 410a is coated with parting agent layer 420 through processing treatment, and becomes discoid film substrate unit with the mode rewinding toward the outer side of this parting agent layer 420.This discoid film substrate unit is earlier by separating winding apparatus, should discoid film substrate unit uncoiling be flaky film substrate, cuts the itemize step again.In this embodiment, utilize the cutting unit in the itemize module 310,, the sheet film base material is cut into the film substrate with preset width, obtain to have the peelable film substrate 410 of preset width by adjusting the tool rest spacing in the cutting unit.
Then, carry out the formation step of adhesive layer.Shown in Fig. 6 A and Fig. 6 B, utilize the coating unit in the gluing module 320, with this adhesive material 430 ' be coated to second surface 410b of this film substrate 410; Utilize apparatus for baking again, make this adhesive material suitably solidify to form adhesive layer 430.On the other hand,, also can use other device (for example energy exposure device), make this adhesive material through suitably solidifying to form adhesive layer according to selected adhesive material.Therefore, according to the present invention, the surface that is used for this film substrate forms the gluing module of adhesive layer, is not only to be confined to coating unit and apparatus for baking, and the personnel that have the knack of this technology also can select other device for use according to the characteristic of the adhesive material that uses.
On the other hand, owing to the first surface 410a of this film substrate 410 is coated with parting agent layer 420 through processing treatment, so this adhesive layer 430 is for the clinging power of the second surface 410b of this film substrate 410, greater than the clinging power of this adhesive layer 430 for the first surface 410a of this film substrate 410.But, this kind adhesive layer is for the first surface of this film substrate and the difference of second surface clinging power, be not only to reach by the processing mode that applies parting agent, other is such as surface coarsening or increase processing modes such as surperficial resistance to bond, also can suitably select for use, make the clinging power of this adhesive layer, relatively greater than the clinging power of this adhesive layer for the first surface and the side surface of this film substrate for the second surface of this film substrate.
As shown in Figure 7, utilize the bobbin rewinding unit in the rewinding module 330, directly will be formed with the film substrate 410 of adhesive layer 430, be positioned at inboard mode with adhesive layer 430, the partly overlapping first surface 410a that conforms to the film substrate 410 of internal layer adhesive tape forms discoid unit.
The method according to this invention, because the mode of this rewinding is to adopt the not overlapping bobbin rewinding that conforms to the internal layer adhesive tape fully of outer adhesive tape, but not all complete overlapping repetition winding-structure that closes of general inside and outside layer; Therefore, under the condition of the radial thickness that does not increase discoid unit finished product, the adhesive tape amount that can significantly increase institute's rewinding in the single finished product to about 6 times or more than.
On the other hand, the method of adhesive tape because manufacturing of the present invention is sealed a letter, be after adhesive layer forms, directly carry out the bobbin rewinding, do not need extra rewinding and uncoiling step, so can finish the seal a letter manufacturing of adhesive tape of bobbin composite volume type by the continous way processing procedure, advantage such as have the making processes of simplification and enhance productivity.
In addition as above-mentioned, because this adhesive layer is for the clinging power of the second surface of this film substrate, relatively greater than the clinging power of this adhesive layer for the first surface and the side surface of this film substrate, even if use the incomplete overlapping bobbin rewinding that conforms to the internal layer adhesive tape of outer adhesive tape to form discoid unit finished product, the situation of first surface that adhesive layer remains in the film substrate of internal layer adhesive tape can not take place when uncoiling uses yet, and can avoid colloid to leak out to the problem of internal layer adhesive tape seam simultaneously yet.
Fig. 8 is the seal a letter section of structure of adhesive tape of the formed bobbin composite volume type of method of the present invention.This adhesive tape 500 of sealing a letter comprises: have first surface 510a, opposing second surface 510b and connect this first surface and this second surface side surface 510c tear film 510, and be formed at the adhesive layer 530 that this tears the second surface 510b of film 510, this adhesive tape 500 of sealing a letter is to be positioned at inboard mode with adhesive layer 530 to carry out rewinding, and the overlapping first surface 510a that tears film 510 that pastes to the internal layer adhesive tape in this outer layer glue band portion ground, and form discoid unit.Because this adhesive layer 530 is torn the clinging power of the second surface 510b of film 510 for this, tears the clinging power of the first surface 510a and the side surface 510c of film 510 greater than this adhesive layer 530 for this; Therefore, even the adhesive layer of outer adhesive tape directly pastes to the seam crossing of internal layer adhesive tape, the situation of the colloid seepage flow that adhesive layer also can not take place to the slit.
In addition, this first surface 510a that tears film 510 can further be formed with parting agent layer 520 through processing treatment, and when avoiding uncoiling to use, the adhesive layer of outer adhesive tape remains in the first surface of tearing film or the side surface of internal layer adhesive tape.