Patent Application
20180009584
There are a variety of items where an adhesive strip is applied to an object in order to affix the object to a surface, such as a wall or other surface. This is a labor-intensive process, since either the user of an item or a factory worker must remove a piece of adhesive strip, and many times a covering on the adhesive surface, and stick it to the item. The user or worker likely will contaminate the adhesive with oils or dirt from their hands resulting in the adhesive strip losing its adhesiveness.
In one embodiment, a method for joining adhesive tape to an object includes providing a piece of adhesive material, the piece of adhesive material having an adhesive surface covered with a removable cover on a first side and a non-tacky surface on a second side. The method further includes placing the piece of adhesive material in a mold and extruding an extrudable material over the adhesive tape, the extrudable material contacting the non-tacky surface of the adhesive material in the mold. The method further includes molding an object in the mold from the extrudable material and bonding the non-tacky surface to the object, the bonding resulting from the heat of the extrudable material. Optionally, the non-tacky material includes a heat-activated adhesive. In one configuration, the non-tacky material is a material that is compatible with the extrudable material for bonding purposes. In one alternative, the non-tacky material is polypropylene, and the extrudable material is thermoplastic elastomers (TPE). Optionally, the adhesive material includes a piece of adhesive tape, the adhesive tape having adhesive on both sides of the tape, a first side of the adhesive tape sticking to the polypropylene and a second side of the adhesive tape having the adhesive surface covered with the removable cover.
In one embodiment, an article includes a body, the body formed of an extruded material. The article further includes a piece of adhesive material, the piece of adhesive material having an adhesive surface covered with a removable cover on a first side and a second side bonded to the body, wherein the bonding results from heat contained in the extruded material during the bonding process. Optionally, the second side includes a non-tacky heat-activated adhesive. In one alternative, the second side includes a non-tacky material, the non-tacky material is a material that is compatible with the extruded material for bonding purposes, and the non-tacky material bonds to the extruded material when heated. In another alternative, the non-tacky material is polypropylene and the extruded material is TPE. Optionally, the extruded material is TPE.
In one embodiment, an article for hanging objects includes a twist tie and a body, the body connected to the twist tie. The article further includes a piece of adhesive material, the piece of adhesive material having an adhesive surface covered with a removable cover on a first side and a second side bonded to the body, wherein the bonding results from heat contained in the extruded material during the bonding process. Optionally, the second side includes a non-tacky heat-activated adhesive. Alternatively, the second side includes a non-tacky material, and the non-tacky material is a material that is compatible with the extruded material for bonding purposes, and the non-tacky material bonds to the extruded material when heated. Optionally, the non-tacky material is polypropylene and the extruded material is TPE. Alternatively, the extruded material is TPE. Optionally, the article is formed by placing a twist tie and the piece of adhesive material in a mold and extruding the body around a first end of the twist tie and on top of the second side of the adhesive material.
In another embodiment, a method of making an article for hanging objects includes placing a first end of a twist tie in a mold. The method further includes placing a piece of adhesive material in the mold, the adhesive material having an adhesive surface covered with a removable cover on a first side and a second side of non-tacky material, the second side facing up. The method further includes extruding an extruded material onto the second side and around the first end of the twist tie, with heat from the extruding forming a bond between the second side and the extruded material. Optionally, the second side includes a non-tacky heat-activated adhesive. In one alternative, the second side includes a non-tacky material, and the non-tacky material is a material that is compatible with the extruded material for bonding purposes, and the non-tacky material bonds to the extruded material when heated. Optionally, the non-tacky material is polypropylene and the extruded material is TPE. In one configuration, the extruded material is TPE.
In another embodiment, an article for hanging objects includes a twist tie and a body, the body connected to the twist tie. The article further includes a piece of adhesive material, the piece of adhesive material having an adhesive surface covered with a removable cover on a first side and a second side bonded to the body. Optionally, the bonding results from heat contained in the extruded material during the bonding process. Optionally, the durometer of an outer layer of the twist tie is less than 50 shore A.
Various systems and methods for creating objects including adhesive strips are included herein. In many embodiments, creation of items according to the methods herein occurs according to two paradigms. A first technique includes creating an unique item having a non-tacky surface that is bonded to a thermoplastic or thermoset material. The non-tacky surface generally includes a heat active adhesive which is activated when the thermoplastic or thermoset material is extruded onto the non-tacky surface. Essentially, this might be terms a method of activating a non-tacky surface by extruding a thermoplastic or thermoset material on to it. In an alternative, a molecularly compatible thermoplastic or thermoset film is used to create a molecular bond with a thermoplastic or thermoset polymer in order to create a unique item. Essentially, this method includes activating thermoplastic or thermoset material for bonding by extruding a thermoplastic or thermoset onto it. In many of the embodiments described herein, the objective is to attach a pressure sensitive adhesive via either of the above two paradigms.
The structure achieved by the described process results in a superior bond of the adhesive strip to the extruded material. The preferred materials are important to consider. The body and the twist tie typically are composed of thermoplastic elastomer. It is very difficult in many cases for adhesive to stick to such materials. In this case, the adhesive strip is 3M™ W4112 adhesive tape. Other 3M™ tapes includes 3M™ Weatherstrip attachment tape 5403 (also 4981, 5935, 5404, ST1200, and WT4112). Some of these adhesive tapes such as WT4112 and ST1200 include a layer of foam between the pressure sensitive adhesive and the heat activated adhesive. The 4981 tape includes a polyester film between adhesives instead. This includes heat-activated E2 adhesive. This adhesive tape has a heat-activated adhesive on one side and a pressure sensitive adhesive covered by a protective strip on the other side.
The distinctive structural characteristics imparted to the product produced by using this adhesive tape and molding on top of it is multifold as compared to an adhesive strip having two sides of contact adhesive. First, the alignment of the adhesive strip is superior, since the adhesive strip sits in a depression that is correctly oriented during extrusion. Second, the bond is superior, due to the heat-based molecular bonding. The bond is also superior, since some contamination of a contact adhesive usually occurs during application. This does not occur with the heat-activated adhesive, since prior to heat activation the surface is not tacky. Therefore, contamination is much less likely. Also, as described above, using vacuum pressure to hold the adhesive tape in place, various three-dimensional configurations of the tape may be created, such as holding the tape on a corner so that it folds and after extrusion holds the shape of the corner. Moreover, the adhesion provided by the heat-activated adhesive is stronger and much less likely to release. Therefore, when the GTH 100 is placed and then later removed, a portion of the adhesive strip is much less likely to release from the GTH 100. Therefore, the only release point is the pressure sensitive adhesive on the other side, which generally results in a clean removal of the GTH 100 and a much reduced chance of piece of the adhesive strip being left behind.
In an alternative, instead of using an adhesive strip composed of 3M™ W412 adhesive tape, a piece of polypropylene is substituted. Polypropylene or other material may have superior bonding to the TPE material used as compared to a pressure sensitive adhesive. Alternatively, instead of TPE, other thermoset and thermoplastic polymers may be used, including but not limited to: rubber or ethylene propylene rubber (EPM) may be used in place of TPE. These materials also have very poor bonding characteristics; however, they will bond well to polypropylene, which is a good material on which a pressure sensitive adhesive may be placed.
Although GTH 100 is shown as resulting from the bonding process used during heat extrusion, a variety of products may be formed according to the same procedure. In other words, instead of the body and twist tie shown, almost any product may be extruded onto the heat-activated adhesive in order to attach an adhesive strip to the product. These products may include traditional hooks as are commonly used with adhesive strips or other products made of rubber, such as moldings, etc. A wide variety of products composed of thermoset and thermoplastic polymers, including but not limited to TPE, EPM, or rubber, may be created and attached to adhesive strips as described herein. Alternatively, as described herein, a superior surface for attaching adhesive to extruded materials may be created as described herein. This material may be polypropylene or other materials that bond to thermoset and thermoplastic polymers, including but not limited to TPE, EPM, or rubber under the heat and pressure created during the molding process. In addition to bonding polypropylene to thermoset and thermoplastic polymers, cross-link polyethylene foams may be used as a bonding layer, since cross-link polyethylene foams have compatible bonding characteristics with thermoset and thermoplastic polymers such as TPE. Furthermore, alloyed TPE, which is formulated to bond with acrylic films, could be used with or without a PlexarTM bonding agent to bond to metal or a magnet.
The previous detailed description is of a small number of embodiments for implementing the systems and methods for creating objects with bonded adhesive strips and the systems of the objects with bonded adhesive strips and is not intended to be limiting in scope. The following claims set forth a number of the embodiments of the systems and methods for creating objects with bonded adhesive strips and the systems of the objects with bonded adhesive strips disclosed with greater particularity.
This application is a divisional of U.S. application Ser. No. 14/759,388 filed Jul. 6, 2015 which is a National Stage of PCT Application No. PCT/US2014/010334 filed on Jan. 6, 2014, which PCT application claims the benefit of U.S. Provisional Application No. 61/749,810 filed Jan. 7, 2013. All of the above applications are hereby incorporated by reference to the same extent as though fully contained herein.
| Number | Date | Country | |
|---|---|---|---|
| 61749810 | Jan 2013 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 14759388 | Jul 2015 | US |
| Child | 15710650 | US |
