TWI534051B - Hidden seal with concealed ear - Google Patents

Description

Concealed membrane with hidden pull

The present invention relates to a closure film for sealing the mouth of a container, and more particularly to a closure film having a concealed pull tab.

At present, the sealing film of the prior art generally has one of the outwardly extending tabs for the user to hold the tab when the tearing off the sealing film, as the point of application to tear off the sealing film, but The area of the outerly extending pull ear is usually small, so that the user cannot firmly hold the pull ear when tearing off the seal film, causing inconvenience in applying force.

In addition to the inconvenience of the above-mentioned force application, the joint portion of the sealing film and the outwardly extending pull ear provided by the prior art tends to have insufficient strength, resulting in the sealing film and the outwardly extending pull ear during tearing. The joint portion is broken to lose its function, causing defects in the use of the seal film.

In addition, the outwardly extending puller also causes the sealing film to be folded back to seal the seal when sealed in the mouth of a container, however, when the puller is in a folded state, After the sealing and sealing, the reflexed position of the pull ear is increased in thickness due to folding, thereby causing the sealing film after the press-sealing to assume an unclosed state at the position of the pull ear, thereby making the contents of the container possible There is a problem with spills.

The prior art further discloses a concealed pull structure to solve the above problems. However, the pull structure is disadvantageous in that it is not easily peeled off due to the use of the foam material; further, the pull structure is also thermally expanded due to the material of each layer. The difference in coefficients results in the disadvantage of warpage after heat treatment.

In view of the above-mentioned shortcomings of the prior art, it is an object of the present invention to disclose a sealing film which is not easily broken, and at the same time, the sealing film can solve problems such as difficulty in peeling and warping of the ear.

In order to achieve the above object, the present invention provides a concealed sealing film comprising: a bottom layer having a heat sealing layer, an aluminum foil layer and a polypropylene (PP, polypropylene) sequentially stacked from bottom to top. a layer, and each layer is adhered by an adhesive; and a top layer connected to the bottom layer, the top layer having a nylon (Nylon) layer and a polyethylene terephthalate stacked sequentially from bottom to top a PET (polyethylene terephthalate) layer, the nylon layer and the polyethylene terephthalate layer are adhered by an adhesive, and the top layer is divided into a connecting portion and a pull portion; wherein The nylon layer of the joint in the top layer is fixedly attached to the polypropylene layer of the bottom layer by an adhesive having a nylon layer having at least one joint with the polypropylene layer of the bottom layer.

In a sealing film according to an embodiment of the invention, the area to which the connecting portion is attached occupies half of the area of the bottom layer.

In the embodiment of the present invention, when the number of the contacts is one, the contact is located on the symmetry line of the lug portion.

In a sealing film according to an embodiment of the invention, the adhesive is a polyurethane (PU) glue.

In summary, compared to the foam material used in the traditional pull structure In contrast, the concealed film of the present invention has a higher toughness of the nylon layer of the lug portion, so that the lug portion has an effect of not easily breaking, and at the same time, the foam material in the conventional lug structure. The adhesion to the polypropylene material is easy to occur, and the present invention utilizes the property that the material between the nylon layer of the top layer and the polypropylene layer of the bottom layer is not easily bonded, so that the tab portion of the top layer and the bottom layer are easily peeled off. In addition, by using the joint between the nylon layer of the middle ear and the polypropylene layer of the bottom layer, the sealing film with the hidden ear of the present invention can be avoided when the product with the sealing film is subjected to high temperature sterilization. The sealing film is warped due to the difference in degree of thermal expansion, thereby improving the convenience in use. On the other hand, if the user observes the connection between the nylon layer of the lug portion of the top layer and the polypropylene layer of the bottom layer. When the dots are separated, the sealing film can be quickly judged to have been used, thereby preventing the user from misusing the used products to provide safety in use.

To fully clarify the objects, features, and advantages of the present invention, those of ordinary skill in the art of the invention can understand the invention and practice the invention. The present invention will be described in detail with reference to the following: Referring to FIG. 1A and FIG. 1B simultaneously, the concealed film 1 of the present invention comprises a bottom layer 11 and a top layer 12, wherein the bottom layer 11 It is used to attach to the mouth of a container to seal the container, and a portion of the top layer 12 is used as a user-held pull ear for tearing off the sealing film 1. Meanwhile, in the embodiment, the bottom layer 11 has the same area as the top layer 12, By stacking the bottom layer 11 and the top layer 12 in the same area, the pull ear in the sealing film 1 is a hidden pull ear in the present invention.

Further, in the present embodiment, the sealing film 1 is circular in order to fit the ring shape of the bottle mouth, but it should be understood that the shape of the sealing film 1 of the present invention can be utilized depending on the mouth of the container to be attached. Mold making, and thus other geometric shapes.

The bottom layer 11 comprises a heat seal layer 111, an aluminum foil layer 112 and a polypropylene layer 113. The heat seal layer 111 is composed of a heat seal layer 111 for attaching to the bottle of the container. Mouth, in order to make the container form a sealed state, at the same time, the heat sealant uses the currently available hot melt adhesive material, it should be understood that the type of heat sealant needs to match the material of the container to be attached to achieve Sufficient adhesion; in addition, since the characteristics, composition, and manner of use of the heat sealant are well known to those of ordinary skill in the art to which the present invention pertains, no further details will be described herein. Furthermore, the aluminum foil layer 112 is attached to the heat seal layer 111, and the contact surface of the aluminum foil layer 112 and the heat seal layer 111 is adhered by adhesive, and the aluminum foil layer 112 is waterproof. Aluminum metal of the material. Furthermore, the polypropylene layer 113 is attached to the aluminum foil layer 112, and the contact surface of the polypropylene layer 113 and the aluminum foil layer 112 is adhered by adhesive, and the polypropylene layer 113 is included. Polypropylene of polymer materials.

The top layer 12 includes a nylon layer 121 and a polyethylene terephthalate layer 122 attached to the nylon layer 121. The top layer 12 is divided into a connecting portion 13 and a tab portion 14 . The nylon layer 121 utilizes a relatively rigid nylon polymer as a support material, and the nylon layer in the top layer 12 121 is based on the fact that the material between the bottom layer 11 and the polypropylene layer 113 is not easily bonded, so that the tab portion 14 and the bottom layer 11 are easily peeled off. Further, the nylon layer 121 and the polyterephthalic acid in the top layer 12 are The contact surface of the ethylene glycol layer 122 is adhered by an adhesive; meanwhile, the nylon layer 121 of the connecting portion 13 in the top layer 12 is also adhered to the polypropylene layer 113 in the bottom layer 11 by using an adhesive, so that the top layer The nylon layer 121 of the connecting portion 13 is fixedly connected to the polypropylene layer 113 of the bottom layer 11. Further, the area of the connecting portion 13 of the top layer 12 is half of the area of the bottom layer 11, but is not limited thereto. The ratio of the area where the connecting portion 13 is attached to the area of the bottom layer 11 can be adjusted as needed; further, in the embodiment, the nylon layer 121 of the tab portion 14 of the top layer 12 and the polypropylene layer of the bottom layer 11 113 has a contact 15 which is adhesively fastened to the polypropylene layer 113 of the bottom layer 11 of the bottom layer 12 by adhesive, so that the present invention is hidden The sealing film 1 of the type of pull ear is avoided when subjected to heat treatment (for example, high temperature sterilization treatment) The sealing film 1 is separated from the bottom layer 11 due to the warpage caused by the difference in the degree of thermal expansion, thereby improving the convenience in use. Further, when the nylon layer 121 of the tab portion 14 in the top layer 12 is observed, When the joint 15 between the polypropylene layers 113 of the bottom layer 11 is separated, it can be judged that the sealing film 1 has been used, thereby preventing the user from misusing the used product and providing safety in use. Moreover, in the embodiment, the position of the contact 15 is attached to the symmetry line of the pull portion 14 to evenly fix the pull portion 14, but not limited thereto, the contact 15 is also visible. The shape of the lug portion 13 or the need for use is attached to other areas. It should be noted that due to the connection portion 13 of the top layer 12 and the bottom layer 11 The adhesion between the polypropylene layers 113 is higher than the adhesion of the contacts 15, so that when the force is applied to separate the contacts 15, the connection portion 13 of the top layer 12 and the polypropylene layer 113 of the bottom layer 11 You can still stay connected.

In addition, it should be understood that in other embodiments of the present invention, more than one joint may be provided between the nylon layer of the top middle lug portion and the polypropylene layer of the bottom layer, such as the seal shown in FIG. The membrane 2 provides two joints 25 to further avoid warping of the ears 24 having a larger area.

Referring again to FIGS. 1A and 1B, in the present embodiment, between the heat seal layer 111, the aluminum foil layer 112, the polypropylene layer 113, the nylon layer 121, and the polyethylene terephthalate layer 122, The adhesive applied is a polyurethane adhesive, and it is understood by those of ordinary skill in the art that the polyurethane adhesive applied has a corresponding characteristic or composition to provide sufficient adhesion in order to match the different properties of the materials of the layers. Further, in the laminating process of the bottom layer 11, a plurality of strips of adhesive tape formed by the adhesive between the heat seal layer 111 and the aluminum foil layer 112 and between the aluminum foil layer 112 and the polypropylene layer 113 a full contact surface, and during the laminating process of the top layer 12, the nylon layer 121 and the polyethylene terephthalate layer 122 are also covered with a glue strip formed by a glue, preferably, The strips between the contact faces are equally spaced apart from each other to facilitate uniform distribution of the adhesive; further, the contact surface between the polypropylene layer 113 and the nylon layer 121 is divided into two regions to be individually coated. , thereby forming a fixed connection connecting portion 13 and being peelable Contact 15. Next, after the application of the adhesive, a pressure-bonding treatment may be performed to sufficiently cover the adhesive surface, but the method of applying the adhesive of the present invention is not limited thereto and may be carried out by a generally known technique.

Next, referring to the use state diagram of the concealed membrane 1 with hidden concealer of the present invention in FIG. 3, when the user wants to tear off the parafilm 1 on a container 10, the tab portion 14 is first picked up. At this time, the pull portion 14 serves as a grip for the user to apply force, and then the pull tab portion 14 is pulled up to separate the sealing film 1 from the mouth of the container 10 to complete the tearing action.

Accordingly, the invention has been described herein in terms of the preferred embodiments of the present invention, and it should be understood that this invention is not intended to limit the scope of the invention. It should be noted that variations and permutations equivalent to those of the embodiments are intended to be included within the scope of the present invention. Therefore, the scope of protection of the present invention is defined by the scope of the patent application.

1‧‧‧Seal film

10‧‧‧ Container

11‧‧‧ bottom layer

111‧‧‧Heat seal

112‧‧‧Aluminum foil layer

113‧‧‧PP layer

12‧‧‧ top

121‧‧‧Nylon layer

122‧‧‧polyethylene terephthalate layer

13‧‧‧Connecting Department

14‧‧‧拉拉

15‧‧‧Contacts

2‧‧‧Seal film

24‧‧‧拉耳

25‧‧‧Contacts

1A is a plan view of a concealed film with a concealed pull ear according to an embodiment of the present invention.

Figure 1B is a cross-sectional view of the sealing film with hidden tabs taken along line C-C of Figure 1A.

Fig. 2 is a plan view showing a concealed tab film according to another embodiment of the present invention.

Fig. 3 is a view showing the state of use of the concealed sealing film of the present invention.

1‧‧‧Seal film

11‧‧‧ bottom layer

111‧‧‧Heat seal

112‧‧‧Aluminum foil layer

113‧‧‧PP layer

12‧‧‧ top

121‧‧‧Nylon layer

122‧‧‧polyethylene terephthalate layer

13‧‧‧Connecting Department

14‧‧‧拉拉

15‧‧‧Contacts

Claims (4)

A sealing film with a hidden puller, comprising: a bottom layer having a heat seal layer, an aluminum foil layer and a polypropylene layer stacked in order from bottom to top, and the layers are adhered by adhesive; a top layer connected to the bottom layer, the top layer having a nylon layer and a polyethylene terephthalate layer sequentially stacked from bottom to top, the nylon layer and the polyethylene terephthalate layer The interlayer is separated by a glue, and the top layer is divided into a connecting portion and a pull portion; wherein the nylon layer of the connecting portion in the top layer is fixedly attached to the polypropylene layer of the bottom layer by adhesive The nylon layer of the top middle middle ear portion and the polypropylene layer of the bottom layer have at least one joint; wherein the contact is used to adhesively fix the nylon layer of the top middle middle lug portion to the bottom layer On the polypropylene layer. The sealing film according to claim 1, wherein the area to which the connecting portion is attached accounts for half of the area of the bottom layer. The sealing film according to claim 1, wherein when the number of the contacts is one, the contact is located on a symmetry line of the lug portion. The sealing film of claim 1, wherein the adhesive is a polyurethane adhesive.