TW202529658A - Continuous Fastening Components: Anti-seepage Zippers and Daily Necessities with Opening and Closing Functions (Part 2) - Google Patents

Abstract

A continuous engagement element-based leakproof zipper comprises: a filler body, which has a first thermoplastic elastomer filled into at least a portion of a central gap between a pair of support tapes, wherein the filler body includes a left filling portion, a right filling portion, and a first gap; and an expansion body, which is formed of a second thermoplastic elastomer, wherein at least a portion of the expansion body is joined to either the left free end surface or the right free end surface, and the expansion body has an expansion body free end surface, and the expansion body increases the filling volume within the central gap, so that when the leakproof zipper is in a state of engagement, the expansion body free end surface abuts against the free end surface of one of the filling portions opposite thereto.

Description

Continuous Fastening Components: Anti-seepage Zippers and Daily Necessities with Opening and Closing Functions (Part 2)

The present invention relates to a seepage-proof zipper, particularly but not limited to a seepage-proof zipper with continuous fastening elements. The present invention also relates to an everyday item using the seepage-proof zipper.

The most difficult problem to overcome in waterproof zippers is water seepage through the central gap. Therefore, the key points disclosed in the patents for waterproof zippers are all on how to overcome the problem of fluid seepage through the central gap. As shown in the US patent No. 8,397,353 owned by the applicant of this case, it discloses that a polymer elastomer is poured into a central gap of a continuous loop fastening element zipper to form a covering portion and a filling portion. The covering portion occupies the central gap, and after a waterproof layer is adhered to a pair of supporting fabrics, the waterproof layer and the covering portion are separated in the central gap, and a dividing seam is provided to separate the covering portion. Since the continuous loop fastening element zipper The deformable and movable structural characteristics of the chain's components prevent the dividing seam from closing tightly. Furthermore, the polymer elastomer in the filler portion hinders the interlocking depth of the fastening elements, causing the dividing seam to widen. Consequently, a water repellent is required to render the dividing seam water-resistant. However, this cannot resist the penetration of pressurized fluids, significantly reducing the applicability of waterproof items and urgently requiring improvement.

For example, U.S. Patent No. 10,959,497 B2 discloses a gel layer that divides the central gap at a width ratio of 1:2, with the zipper and the injected elastic body being identical to those in U.S. Patent No. 8,397,353 owned by the applicant of this case. Therefore, the dividing seam does not differ due to the biased orientation. Without the addition of an elastic body to block it, the dividing seam in U.S. Patent No. 10,959,497 B2 would still suffer from water seepage due to the lack of abutment as described above.

The primary objective of this invention is to provide a continuous fastening element anti-seepage zipper comprising a filler body formed of a thermoplastic elastomer and a caulking portion, the filler body having a slit, and an expansion body formed of a second thermoplastic elastomer. The expansion body is at least partially bonded to a free end surface of a left filling portion or a free end surface of a right filling portion, and the expansion body has an expansion body free end surface. When the anti-seepage zipper is fastened and no external force is applied, the free end surface of the expansion body abuts against the free end surface of the opposite filling portion, thereby achieving an excellent anti-seepage effect against fluids, such as liquids.

To achieve the aforementioned purpose, the technical means adopted in this case is to provide a continuous fastening element anti-seepage zipper, which includes a pair of parallel supporting fabric tapes, each of which has a first surface, a second surface arranged opposite to the first surface, an inner side surface and an inner edge; two rows of multiple continuous fastening elements, which are arranged opposite to the inner edge of the second surface of each supporting fabric tape or an outer edge of the first surface that is folded back in a reverse shape; when the anti-seepage zipper is in a fastened state, a first thermoplastic elastic body fills at least a portion of a central gap between the pair of inner sides to form a filling body located in the central gap, and continues to penetrate into each of the fastening elements. The filler body is provided with a filler portion formed in each seam between the left end and the core wire and/or the at least one bonding line of each of the opposite fastening elements; the filler body includes at least a left filler portion and a right filler portion, each of the left and right filler portions having a left free end surface, a right free end surface, and a first gap between the free end surfaces; the filler body is characterized by further comprising: an expansion body formed of a second thermoplastic elastomer, at least a portion of the expansion body being bonded to the left free end surface or the right free end surface, the expansion body having an expansion body free end surface; when the anti-seepage zipper is in the fastened state, the free end surface of the expansion body abuts against the free end surface of the opposite filling portion.

In one embodiment, the left filling portion and the right filling portion have different widths, and at least a portion of the expansion body is bonded to the free end surface of the filling portion with a smaller width.

In one embodiment, a waterproof layer is provided on at least the first surface of the pair of supporting fabric strips, and the waterproof layer covers the left filling part and the right filling part.

In one embodiment, a waterproof layer is provided on at least the first surface of the pair of supporting fabric strips, and the waterproof layer covers the left filling part, the expansion body, and the right filling part.

In one embodiment, the first thermoplastic elastomer forms the waterproof layer, the filling portion and the caulking portion are integrally connected, and the filling portion is divided at the central gap to form the left filling portion, the right filling portion, and the gap.

In one embodiment, a waterproof layer is provided on at least the first surface of the pair of supporting fabric strips, and the waterproof layer further extends to cover the free end surface of the expansion body and the free end surface of the opposite filling portion.

In one embodiment, at least one of the first surface and the second surface of the pair of supporting fabric tapes is impregnated or coated with a bonding agent to improve the bonding strength of the waterproof layer.

In one embodiment, at least one of the first surface and the second surface of the pair of supporting fabric strips is treated with a water repellent so that the pair of supporting fabric strips have a water-repellent function.

In one embodiment, the free end surface of the expansion body is bonded to the free end surface of the opposite filling portion through a bonding process to form a composite body, which is then divided substantially along a centerline of the central gap to form a left composite body, a right composite body, and a third gap, wherein the left composite body has a left composite body free end surface, and the right composite body has a right composite body free end surface; when the anti-seepage zipper is fastened and no external force is applied, the free end surface of the left composite body and the free end surface of the right composite body abut against each other.

In one embodiment, a waterproof layer is provided on at least the first surface of the pair of supporting fabric strips, and the waterproof layer covers the left assembly and the right assembly.

In one embodiment, a covering layer is provided on at least a portion of the first surface of the pair of supporting fabrics, and the covering layer further extends to cover the free end surface of the left assembly and the free end surface of the right assembly.

Another object of the present invention is to provide an everyday item with an opening and closing function, which is provided with a continuous buckling element and a waterproof zipper to provide the opening and closing function.

To achieve the aforementioned purpose, the technical means adopted in this case is to provide an everyday item with an opening and closing function, which is equipped with the aforementioned continuous fastening element anti-seepage zipper.

In one embodiment, the daily item with an opening and closing function is a daily item selected from the group consisting of clothing, a carrying device, and camping equipment.

As shown in Figures 1a and 1b, which are cross-sectional views of a first embodiment of the present invention's continuous fastening element anti-seepage zipper, the anti-seepage zipper is manufactured by subjecting a conventional zipper 1 to a casting process to form a filler 41. This filler 41 is then divided approximately along a centerline of a central gap 12 between a pair of supporting fabric strips 11 to form a left filling portion 411 and a right filling portion 412 of approximately equal width (shown in Figure 1a). Furthermore, an expansion process (shown in Figure 1b) is performed to complete the manufacturing process.

The zipper 1 includes a pair of parallel supporting tapes 11, each of which has a first surface 11a, a second surface 11b opposite the first surface 11a, an inner edge 11c, and an inner surface 11d. A central gap 12 is defined between the two opposing inner surfaces 11d. A plurality of continuous fastening elements 2 arranged in a row are joined at least one joining line 3 at each inner edge 11c of the pair of supporting tapes 11.

Each of the two rows of continuous fastening elements 2 has a top surface 21, a bottom surface 22, and a fastening end 23. The pair of supporting fabric strips 11 are made of warp knitting or woven fabric, and may be elastic in one warp direction and/or one weft direction, if necessary, so that each supporting fabric strip 11 has elastic properties in the warp direction and/or weft direction.

Each of the two rows of continuous fastening elements 2 is formed from polyamide monofilament or polyester monofilament by heat forming into a continuous loop shape. A core thread 25 is inserted into each inner cavity 24 between the top surface 21 and the bottom surface 22, and the at least one bonding thread 3 is sewn to the inner edge 11c of each supporting fabric tape 11, so that the continuous fastening elements 2 in each row are adjacent to the second surface 11b of the corresponding supporting fabric tape 11 with the top surface 21.

In fact, in addition to the aforementioned continuous turn fastening element zipper with a core wire 25, the zipper 1 can also be selected from a continuous turn fastening element zipper without a core wire, a continuous folding fastening element zipper without a core wire, a continuous turn fastening element invisible zipper, and a continuous turn fastening element braided zipper, but is not limited thereto.

As shown in FIG1a , the injection process involves injecting a first thermoplastic elastomer 4 into the central gap 12 with the zipper in the fastened state to form a filling body 41. The filling body 41 then penetrates into each of the gaps 26 between the fastening ends 23 of the continuous fastening elements 2 and the core wire 25 and/or the at least one bonding line 3 of the opposing continuous fastening elements 2 to form a filling portion 42. The filling body 41 is then divided within the central gap 12 to form a left filling portion 411, a right filling portion 412, and a first gap 43. The left filling portion has a left free end surface 411a, the right filling portion has a right free end surface 412a, and the first gap 43 is formed between the free end surfaces 411a and 412a.

The zipper 1 is then separated and the free end surface 411a or 412a of the filling portion 411 or 412 is widened. In this widening process, a second thermoplastic elastomer 5 in a hot melt state is placed on the left free end surface 411a or the right free end surface 412a using a glue injection mold having a small injection port to form an expansion body 51. The expansion body 51 has an expansion body free end surface 511. After the expansion process is completed, the anti-seepage zipper is then fastened. The expanded volume of the expansion body 51 within the central gap 12 overcomes the problem of water leakage caused by the first gap 43 not being able to close tightly. Therefore, when the anti-seepage zipper is fastened and there is no external force applied, the free end surface 511 of the expansion body abuts against the free end surface 411a or 412a of the opposite filling portion 411 or 412. As shown in Figure 1b, the expansion body 51 is disposed on the left free end surface 411a. The free end surface 511 of the expansion body abuts against the opposite right free end surface 412a, completing the preparation of the anti-seepage zipper.

Furthermore, according to product requirements, the second thermoplastic elastic body 5 of the expansion body 51 can be made of the same material and have the same color or different colors as the first thermoplastic elastic body 4.

In fact, the width of the expansion body 51, used to prevent water seepage through the original first gap 43, is very small, for example, between 0.1mm and 1.6mm, but not limited thereto, depending on the individual zipper. Compared to the embodiment in which the second thermoplastic elastomer 5 is evenly and perfectly positioned on the left and right free end surfaces, this embodiment places the second thermoplastic elastomer 5 required for the expansion body 51 solely on either the left free end surface 411a or the right free end surface 412a. This not only facilitates construction but also eliminates half of the construction process.

As shown in Figures 2a and 2b, cross-sectional views of a second embodiment of the continuous fastening element anti-seepage zipper of the present invention are provided. The second embodiment differs from the first embodiment in that the left filling portion 411 and the right filling portion 412 have unequal widths. The manufacturing method of the second embodiment is the same as described above. The zipper 1 is fastened and subjected to the injection molding process. The first thermoplastic elastomer 4 is injected into the central gap 12 to form the filling portion 41. The first thermoplastic elastomer 4 then penetrates into each seam 26 between the fastening end 23 of each continuous fastening element 2 and the core thread 25 and/or the at least one joining thread 3 of the opposite continuous fastening element 2 to form the filling portion 42. The filling body 41 is then divided at the central gap 12 to have the left filling portion 411 , the right filling portion 412 and the first gap 43 .

The zipper is then separated and the expansion process is performed on the free end surface 411a or 412a of the filling portion 411 or 412. In this expansion process, the second thermoplastic elastomer 5 in a hot melt state is placed separately on the left free end surface 411a using a glue injection mold having a fine glue injection port to form the expansion body 51. The expansion body 51 has the expansion body free end surface 511.

The width W1 of the left filling portion 411 is smaller than the width W2 of the right filling portion 412. The difference in width between the left filling portion 411 and the right filling portion 412 is approximately equal to the width W3 of the expansion body 51, but this is not limiting. Therefore, in the second embodiment, the width W1 of the left filling portion 411 is smaller than the width W2 of the right filling portion 412. The sum of the width W1 of the left filling portion 411 and the width W3 of the expansion body 51 is approximately equal to the width W2 of the right filling portion 412, i.e., W1+W3=W2. That is, the left filling portion 411 and the right filling portion 412 have different widths, and at least a portion of the expansion body 51 is coupled to the left free end surface 411a of the left filling portion 411 having a smaller width.

Therefore, when the anti-seepage zipper is fastened, the free end surface 511 of the expansion body abuts against the opposite right free end surface 412a. This abutting interface is substantially aligned with the centerline of the central gap 12, resulting in visual and structural symmetry. This structural symmetry can reduce the risk of improper opening and closing of the anti-seepage zipper and wear within a zipper head. Because at least a portion of the expansion body 51 fills the first slit 43, it overcomes the problem of water seepage caused by the lack of a true seal between the first slit 43. Therefore, when the anti-seepage zipper is fastened and no external force is applied, the free end surface 511 of the expansion body abuts against the opposite right free end surface 412a, completing the production of the anti-seepage zipper.

As shown in FIG3 , which shows a cross-sectional view of a third embodiment of the continuous fastening element anti-seepage zipper of the present invention, the difference between the third embodiment and the second embodiment is that at least one waterproof layer 53 is provided on the first surface 11a of the pair of supporting fabric strips and covers the filling body 41.

When the zipper 1 is fastened, the first thermoplastic elastomer 4 is injected into the central gap 12 to form the filling portion 41. The first thermoplastic elastomer 4 then penetrates into each of the seams 26 between the fastening ends 23 of the continuous fastening elements 2 and the core thread 25 and/or the at least one joining thread 3 of the opposite continuous fastening elements 2 to form the filling portion 42.

A waterproof layer 53 is then provided on the first surface 11a of the supporting fabric tape and the filler 41. The waterproof layer 53 is selected from a thermoplastic elastomer coating or a polymer elastomer film. The waterproof layer 53 and the filler 41 are then divided together at the central gap 12 to form the left filler portion 411 and the right filler portion 412. The left filler portion 411 has the left free end surface 411a, the right filler portion 412 has the right free end surface 412a, and the first gap 43 is formed between the free end surfaces 411a and 412a.

The zipper 1 is then separated and the free end surface 411a or 412a of the filling portion 411 or 412 is widened. The widening step involves placing the heat-melted second thermoplastic elastomer 5 on the left free end surface 411a using a mold having a small injection port to form the expansion body 51. The expansion body 51 has the expansion body free end surface 511.

In the third embodiment, the width W1 of the left filling portion 411 is smaller than the width W2 of the right filling portion 412 . The width W1 of the left filling portion 411 plus the width W3 of the expansion body 51 is approximately equal to the width W2 of the right filling portion 412 , that is, W1+W3=W2.

Therefore, when the anti-seepage zipper is fastened, the free end surface 511 of the expansion body abuts against the opposite right free end surface 412a. This abutting interface is substantially aligned with the centerline of the central gap 12, resulting in visual and structural symmetry. This structural symmetry can reduce the risk of improper opening and closing of the anti-seepage zipper and wear within the zipper head. Because at least a portion of the expansion body 51 fills the first slit 43, it overcomes the problem of water seepage caused by the lack of a true seal between the first slit 43. Therefore, when the anti-seepage zipper is fastened and no external force is applied, the free end surface 511 of the expansion body abuts against the opposite right free end surface 412a, completing the preparation of the anti-seepage zipper 1.

As shown in FIG4 , which shows a cross-sectional view of a fourth embodiment of the continuous fastening element anti-seepage zipper of the present invention, the fourth embodiment differs from the third embodiment in that the waterproof layer covers the expansion body 51 and the left and right filling portions 411 and 412.

When the zipper 1 is fastened, the first thermoplastic elastomer 4 is injected into the central gap 12 to form the filling element 41. The filling element 41 then penetrates into each of the gaps 26 between the fastening ends 23 of the continuous fastening elements 2 and the core thread 25 and/or the at least one joining line 3 of the opposing continuous fastening elements 2 to form the filling portion 42. The filling element 41 is then split slightly to the left of the central gap 12 to form a left filling portion 411 and a right filling portion 412, such that the width W1 of the left filling portion 411 is smaller than the width W2 of the right filling portion 412. The left filling portion 411 has a left free end surface 411a, the right filling portion 412 has a right free end surface 412a, and the first gap 43 is formed between the free end surfaces 411a and 412a.

The zipper 1 is then separated and the free end surface 411a or 412a of the filling portion 411 or 412 is widened. The widening step involves placing the heat-melted second thermoplastic elastomer 5 on the left free end surface 411a using a mold having a small injection port to form the expansion body 51. The expansion body 51 has the expansion body free end surface 511.

The zipper 1 is refastened and a waterproof layer 53 is applied to the first surface 11a of the pair of supporting fabric strips 11. The waterproof layer 53 covers the expansion body 51 and the filling body 41. The waterproof layer 53 is selected from a thermoplastic elastomer coating or a laminated polymer elastomer film. The waterproof layer 53 is then split approximately at the contact surface between the expansion body 51 and the opposite filling portion 411 or 412 to form a second slit 52, allowing the anti-seepage zipper to open and close. The waterproof layer 53 and the expansion body 51 together form the expansion body free end surface 511, and the waterproof layer 53 and the right filling portion 412 together form the right free end surface 412a.

In the fourth embodiment, the width W1 of the left filling portion 411 is smaller than the width W2 of the right filling portion 412, so that the sum of the width W1 of the left filling portion 411 and the width W3 of the expansion body 51 is approximately equal to the width W2 of the right filling portion 412, that is, W1+W3=W2.

Therefore, when the anti-seepage zipper is fastened, the free end surface 511 of the expansion body abuts against the opposite right free end surface 412a. This abutting interface is substantially aligned with the centerline of the central gap 12, resulting in visual and structural symmetry. This structural symmetry can reduce the risk of improper opening and closing of the anti-seepage zipper and wear within the zipper head. Because at least a portion of the expansion body 51 fills the gap 43, it overcomes the problem of water seepage caused by the gap 43 not being able to achieve a true seal. Therefore, when the anti-seepage zipper is fastened and no external force is applied, the free end surface 511 of the expansion body abuts against the opposite right free end surface 412a, completing the preparation of the anti-seepage zipper 1.

As shown in FIG5 , which illustrates a cross-sectional view of a fifth embodiment of the present invention's continuous fastening element anti-seepage zipper, the fifth embodiment differs from the third embodiment in that the filler body 41, the caulking portion 42, and the waterproof layer 53 are integrally connected, and the filler body 41 is then divided within the central gap 12 to form the left filler portion 411, the right filler portion 412, and the first gap 43.

The integrally formed filling body 41, the filling portion 42 and the waterproof layer 53 are formed by injecting the first thermoplastic elastomer 4 into the central gap 12 through a single mold when the zipper 1 is in the fastened state to form the filling body 41, and then the first thermoplastic elastomer 4 penetrates into each of the gaps 26 between each of the fastening ends 23 of the continuous fastening elements 2 and the core wire 25 and/or the at least one joining line 3 of each of the opposite continuous fastening elements 2 to form the filling portion. 42, and applied on the first surface 11a of the supporting fabric tape 11 to form the waterproof layer 53, and then the filling body 41 is divided together at the central gap 12 to form the left filling part 411 and the right filling part 412, the left filling part 411 having the left free end surface 411a, the right filling part 412 having the right free end surface 412a, and the first slit 43 between the free end surfaces 411a and 412a.

The zipper 1 is then separated and the free end surface 411a or 412a of the filling portion 411 or 412 is widened. The widening step involves placing the heat-melted second thermoplastic elastomer 5 on the right free end surface 412a using a mold having a small injection port to form the expansion body 51. The expansion body 51 has the expansion body free end surface 511.

In the fifth embodiment, the width W1 of the left filling portion 411 is greater than the width W2 of the right filling portion 412 . The width W2 of the right filling portion 412 plus the width W3 of the expansion body 51 is approximately equal to the width W1 of the left filling portion 411 , that is, W2+W3=W1.

Therefore, when the anti-seepage zipper is fastened, the expanded body free end face 511 abuts against the opposite left free end face 411a. This abutting interface is substantially aligned with the centerline of the central gap 12, resulting in visual and structural symmetry. This structural symmetry prevents the anti-seepage zipper from opening and closing improperly and wearing out within the zipper head. Because at least a portion of the expanded body 51 fills the first slit 43, it overcomes the problem of water seepage caused by the lack of a true seal within the first slit 43. Therefore, when the anti-seepage zipper is fastened and no external force is applied, the expanded body free end face 511 abuts against the opposite right free end face 412a, completing the preparation of the anti-seepage zipper 1. In addition, the integrally formed filling body 41, the filling portion 42 and the waterproof layer 53 can simplify the production process and have the advantage of saving costs.

As shown in Figure 6, which shows a cross-sectional view of the sixth embodiment of the continuous fastening element waterproof zipper of the present invention, the difference between the sixth embodiment and the third embodiment is that the waterproof layer 53, in addition to covering the first surface 11a of the supporting fabric tape and the left and right filling portions 411, 412, further extends to cover the free end surface 511 of the expansion body and the opposite left free end surface 411a.

When the zipper 1 is in the fastened state, the first thermoplastic elastomer 4 is injected into the central gap 12 to form the filling body 41, and then continues to penetrate into each of the fastening ends 23 of the continuous fastening elements 2 and the core wire 25 and/or the at least one bonding line 3 of each of the opposite continuous fastening elements 2 to form the filling portion 42, and is applied to the first surface of the supporting fabric tape 11. 11a to form the waterproof layer 53, and then divide the waterproof layer 53 and the filling body 41 together in the central gap 12 to form the left filling part 411 and the right filling part 412, the left filling part 411 having the left free end surface 411a, the right filling part 412 having the right free end surface 412a, and the first gap 43 between the free end surfaces 411a and 412a.

The zipper 1 is then separated and the free end surface 411a or 412a of the filling portion 411 or 412 is widened. The widening step involves placing the heat-melted second thermoplastic elastomer 5 on the right free end surface 412a using a mold having a small injection port to form the expansion body 51. The expansion body 51 has the expansion body free end surface 511.

In the sixth embodiment, the width W1 of the left filling portion 411 is greater than the width W2 of the right filling portion 412 . The width W2 of the right filling portion 412 plus the width W3 of the expansion body 51 is approximately equal to the width W2 of the left filling portion 411 , that is, W2+W3=W1.

In addition to covering the first surface 11a of the supporting fabric strip, the left filling portion 411, and the right filling portion 412, the waterproof layer 53 further includes an extension portion 53a. The extension portion 53a covers the expansion body free end surface 511 and the opposite left free end surface 411a. The extension portion 53a and the expansion body 51 together form an expansion body free end surface 511, while the extension portion 53a and the left filling portion 411 together form a left free end surface 411a.

Therefore, when the anti-seepage zipper is fastened, the free end surface 511 of the expansion body abuts against the opposite left free end surface 411a, creating an anti-seepage effect. Furthermore, the waterproof layer 53 is selected from an elastomeric waterproof film and is attached when the zipper is opened. This is a known technique and will not be elaborated upon here. The waterproof layer 53 of the elastomeric waterproof film can be selected to have high-temperature resistance, a low friction coefficient, and a specific appearance to enhance the smoothness of the zipper head during opening and closing, its tolerance to the high temperatures encountered in the environment and during the garment production process, and the ability to provide a variety of appearances, including various patterns, colors, and reflective finishes.

As shown in FIG7 , which shows a cross-sectional view of a seventh embodiment of the continuous fastening element anti-seepage zipper of the present invention, the difference between the seventh embodiment and the first embodiment lies in that the expansion body 51 and the right free end surface 412a of the opposite right filling portion 412 are bonded together to form an assembly 6 through a bonding process. The assembly 6 is then divided substantially along the centerline of the central gap 12 to form a left assembly 611 having a left assembly free end surface 611a and a right assembly 612 having a right assembly free end surface 612a of substantially equal width, and a third gap 61 is formed between the left assembly free end surface 611a and the right assembly free end surface 612a.

The manufacturing method of the seventh embodiment is the same as described above. First, the zipper 1 is placed in a fastened state and subjected to the injection molding process to inject the first thermoplastic elastomer 4 into the central gap 12 to form the filling body 41. The first thermoplastic elastomer 4 then penetrates into each of the seams 26 between the fastening ends 23 of the continuous fastening elements 2 and the core thread 25 and/or the at least one joining line 3 of the opposing continuous fastening elements 2 to form the filling portion 42. The filling body 41 is then divided substantially along the centerline of the central gap 12 of the pair of supporting fabric tapes 11 to form a left filling portion 411, a right filling portion 412 (shown in FIG. 1 a ), and the first gap 43 of substantially equal width.

Subsequently, the zipper is separated and the left free end surface 411a of the left filling portion 411 is widened. In this widening process, the second thermoplastic elastomer 5 in a hot melt state is placed separately on the left free end surface 411a using a glue injection mold having a fine glue injection port, thereby forming the expansion body 51 having the expansion body free end surface 511.

Next, a bonding process is performed to bond the expanded body free end surface 511 and the opposing right free end surface 412a together to form a composite body 6 when the zipper is fastened. The composite body 6 is then divided substantially along the centerline of the central gap 12 to form a left composite body 611, a right composite body 612, and a third gap 61 of substantially equal width. The left composite body 611 has a left composite body free end surface 611a, and the right composite body 612 has a right composite body free end surface 612a. The bonding process can be performed by adhesive bonding or hot melt bonding, but is not limited to the aforementioned embodiments.

Therefore, when the anti-seepage zipper is fastened, the left assembly free end face 611a and the right assembly free end face 612a abut against each other. This abutting interface is substantially aligned with the centerline of the central gap 12, resulting in visual and structural symmetry. This structural symmetry can reduce the anti-seepage zipper's improper opening and closing and wear within a zipper head. Because at least a portion of the expansion body 51 fills the first slit 43, it overcomes the problem of water seepage caused by the first slit 43 not being able to truly abut against each other. Therefore, when the anti-seepage zipper is fastened and no external force is applied, the left assembly free end face 611a and the right assembly free end face 612a abut against each other, completing the production of the anti-seepage zipper.

As shown in FIG8 , which shows a cross-sectional view of the eighth embodiment of the continuous fastening element waterproof zipper of the present invention, the eighth embodiment differs from the seventh embodiment in that at least one waterproof layer 53 is provided on the first surface 11a of the pair of supporting fabric strips and covers the assembly 6 .

The manufacturing method of the eighth embodiment is the same as described above. First, the zipper 1 is placed in a fastened state and subjected to the injection molding process to inject the first thermoplastic elastomer 4 into the central gap 12 to form the filling body 41. The first thermoplastic elastomer 4 then penetrates into each of the seams 26 between the fastening ends 23 of the continuous fastening elements 2 and the core thread 25 and/or the at least one joining line 3 of the opposing continuous fastening elements 2 to form the filling portion 42. The filling body 41 is then divided substantially along the centerline of the central gap 12 of the pair of supporting fabric tapes 11 to form a left filling portion 411, a right filling portion 412 (shown in FIG. 1 a ), and the first gap 43 of substantially equal width.

Subsequently, the zipper is separated and the left free end surface 411a of the left filling portion 411 is widened. In this widening process, the second thermoplastic elastomer 5 in a hot melt state is placed separately on the left free end surface 411a using a glue injection mold having a fine glue injection port, thereby forming the expansion body 51 having the expansion body free end surface 511.

Next, through a bonding process, the zipper is fastened, with the expansion body free end face 511 and the opposing right free end face 412a bonded together to form a combined body 6. A waterproof layer 53 is then applied to the first surface 11a of the supporting fabric tape and the combined body 6. The waterproof layer 53 is selected from a thermoplastic elastomer coating or a laminated polymer elastomer film. The waterproof layer 53 and the combined body 6 are then separated at the central gap 12 to form a fourth seam 62, forming the left and right combined bodies 611 and 612. The left assembly 611 has a left assembly free end surface 611a, the right assembly 612 has a right assembly free end surface 612a, and the fourth gap 62 is located between the free end surfaces 611a and 612a. The bonding process can be selected from adhesive bonding or hot melt bonding, but is not limited to the aforementioned embodiments.

Therefore, when the anti-seepage zipper is fastened, the left assembly free end face 611a and the right assembly free end face 612a abut against each other. This abutting interface is substantially aligned with the centerline of the central gap 12, resulting in visual and structural symmetry. This structural symmetry can reduce the anti-seepage zipper's improper opening and closing and wear within a zipper head. Because at least a portion of the expansion body 51 fills the first slit 43, it overcomes the problem of water seepage caused by the first slit 43 not being able to truly abut against each other. Therefore, when the anti-seepage zipper is fastened and no external force is applied, the left assembly free end face 611a and the right assembly free end face 612a abut against each other, completing the production of the anti-seepage zipper.

As shown in Figure 9, which shows a cross-sectional view of the ninth embodiment of the continuous fastening element anti-seepage zipper of the present invention, the difference between the ninth embodiment and the eighth embodiment is that a covering layer 7 covers at least a portion of the first surface 11a of the pair of supporting fabric strips, the left assembly 611, and the right assembly 612, and further extends to cover the free end surface 611a of the left assembly and the free end surface 612a of the right assembly.

The manufacturing method of the ninth embodiment is the same as described above. First, the zipper 1 is placed in a fastened state and subjected to the injection molding process to inject the first thermoplastic elastomer 4 into the central gap 12 to form the filling body 41. The first thermoplastic elastomer 4 then penetrates into each of the seams 26 between the fastening ends 23 of the continuous fastening elements 2 and the core thread 25 and/or the at least one joining line 3 of the opposing continuous fastening elements 2 to form the filling portion 42. The filling body 41 is then divided substantially along the centerline of the central gap 12 of the pair of supporting fabric tapes 11 to form a left filling portion 411, a right filling portion 412 (shown in FIG. 1 a ), and the first gap 43 of substantially equal width.

Subsequently, the zipper is separated and the left free end surface 411a of the left filling portion 411 is widened. In this widening process, the second thermoplastic elastomer 5 in a hot melt state is placed separately on the left free end surface 411a using a glue injection mold having a fine glue injection port, thereby forming the expansion body 51 having the expansion body free end surface 511.

Next, through a bonding process, the zipper is fastened, with the expansion body free end face 511 and the opposing right free end face 412a bonded together to form a combined body 6. A waterproof layer 53 is then applied to the first surface 11a of the supporting fabric tape and the combined body 6. The waterproof layer 53 is selected from a thermoplastic elastomer coating or a laminated polymer elastomer film. The waterproof layer 53 and the combined body 6 are then separated at the central gap 12 to form a fourth seam 62, forming the left and right combined bodies 611 and 612. The left assembly 611 has a left assembly free end surface 611a, the right assembly 612 has a right assembly free end surface 612a, and the fourth gap 62 is located between the free end surfaces 611a and 612a. The bonding process can be selected from adhesive bonding or hot melt bonding, but is not limited to the aforementioned embodiments.

Finally, with the anti-seepage zipper in the detached state, a covering layer 7 is placed over at least a portion of the supporting fabric tape, the waterproof layer 53, and the assembly 6. The covering layer 7 includes a left covering layer extension 711 and a right covering layer extension 712. These extensions 711 and 712 respectively cover the corresponding left assembly free end surface 611a and right assembly free end surface 612a. The left covering layer extension 711 has a left extension free end surface 711a, and the right covering layer extension 712 has a right extension free end surface 712a. A fifth slit 8 is located between these free end surfaces 711a and 712a. The covering layer 7 can be selected from, but is not limited to, a double-layer polymer elastomer film.

Therefore, when the anti-seepage zipper is in the fastened state, the free end surface 711a of the left extension portion and the free end surface 712a of the right extension portion abut against each other. The abutting interface is roughly consistent with the centerline of the central gap 12, thus having visual and structural symmetry. This structural symmetry can reduce the anti-seepage zipper's improper opening and closing and wear inside a zipper head. Because at least a portion of the expansion body 51 and the left covering layer extension 711 are filled within the first slit 43, the problem of water seepage caused by the original inability of the first slit 43 to truly seal and abut is overcome. Therefore, when the anti-seepage zipper is engaged and there is no external force, the free end surface 711a of the left extension and the free end surface 712a of the right extension abut and seal against each other, completing the preparation of the anti-seepage zipper.

In addition, the material of the pair of supporting fabrics 11 can be selected from polyester fiber, polyamide fiber or polyolefin fiber, so that it is similar to the material or polarity of the expander 51. For example, polyester elastomer is used in the pair of supporting fabrics 11 containing polyester fiber, polyamide elastomer and polyurethane elastomer are used in the pair of supporting fabrics 11 containing polyamide fiber, and polyolefin elastomer is used in the pair of supporting fabrics 11 containing fibers such as polyethylene or polypropylene, so as to improve the bonding strength between the waterproof layer 53 and the pair of supporting fabrics 11, and achieve the environmental protection purpose of recycling the same materials together.

If necessary, at least one of the first and second surfaces 11a, 11b of the pair of supporting fabric strips 11 may be pre-impregnated with an adhesive, such as a water-based polyurethane or solvent-based adhesive, to enhance the adhesion of the waterproof layer 53. Furthermore, the pair of supporting fabric strips 11 may also be pre-coated or impregnated with an adhesive, such as a reactive hot melt adhesive or moisture-curing polyurethane, on each first surface 11a of the pair of supporting fabric strips 11 to enhance the adhesion of the waterproof layer 53. The waterproof layer 53 may be formed from a film laminate or a thermoplastic elastomer coating, as desired.

Furthermore, the weaving structure of the pair of supporting fabrics 11 can be selectively elastic in a longitudinal direction or a longitudinal direction to enhance the flexibility and planar flexibility of the pair of supporting fabrics 11.

Furthermore, at least the second surfaces 11b of the pair of supporting fabric strips 11 and the continuous fastening elements 2 may be optionally treated with a water repellent to prevent liquids and other fluids from penetrating through the first gap 43 and a second gap 52 between the expansion body 51 and one of the filling portions 411 or 412, thereby further enhancing the anti-seepage effect of the anti-seepage zipper 1.

Furthermore, if the anti-seepage zipper is treated with a water-repellent agent, the water-repellent agent will be impregnated into at least the second surfaces 11b of the pair of supporting fabrics 11 and the continuous fastening elements 2, thereby further making the pair of supporting fabrics 11 of the anti-seepage zipper have a water-repellent function.

Therefore, the implementation of this design offers several significant benefits, including the following: 1. The expansion element is positioned solely on the left or right free end surface, saving a step compared to installing a separate expansion element on each free end surface. 2. Single-side expansion elements in this design require a larger amount of adhesive than dual-side expansion elements, making installation easier. 3. By varying the width of the filler element, a truly waterproof zipper capable of withstanding various water pressures can be easily and cost-effectively produced. 4. The waterproof zippers produced using each embodiment of this invention can easily withstand a static water pressure of 200mm, eliminating the need for environmentally friendly water-repellent processing, saving both money and the environment. 5. The waterproof zippers can be used on clothing such as clothes or pants, carrying devices such as bags or backpacks, and camping equipment such as tents and sleeping bags, providing these products with waterproofing properties.

The present invention discloses only one preferred embodiment. Any partial changes or modifications based on the technical concept of the present invention and easily inferred by a person skilled in the art do not deviate from the scope of the patent rights of the present invention.

1: Zipper 11: Supporting fabric tape 11a: First side 11b: Second side 11c: Inner edge 11d: Inner side 11e: Outer edge 12: Central gap 2: Continuous fastening element 21: Top surface 22: Bottom surface 23: Fastening end 24: Inner cavity 25: Core thread 26: Seam 3: Bonding line 4: First thermoplastic elastomer 41: Filler 411: Left filling portion 411a: Left free end 412: Right filling portion 412a: Right free end 42: Filling portion 43: First gap 5: Second thermoplastic elastomer 51: Expander 511: Expander free end 52: Second slit 53: Waterproof layer 53a: Extension 6: Assembly 61: Third slit 611: Left assembly 611a: Left assembly free end 612: Right assembly 612a: Right assembly free end 62: Fourth slit 7: Covering layer 711: Left covering layer extension 711a: Left extension free end 712: Right covering layer extension 712a: Right extension free end 8: Fifth slit

To further explain the specific technical details of this invention, please first refer to the accompanying drawings, including: Figures 1a and 1b are cross-sectional views illustrating the preparation process of the first embodiment of the anti-seepage zipper of this invention; Figures 2a and 2b are cross-sectional views illustrating the preparation process of the second embodiment of the anti-seepage zipper of this invention; Figure 3 is a cross-sectional view of the third embodiment of the anti-seepage zipper of this invention; Figure 4 is a cross-sectional view of the fourth embodiment of the anti-seepage zipper of this invention; Figure 5 is a cross-sectional view of the fifth embodiment of the anti-seepage zipper of this invention; Figure 6 is a cross-sectional view of the sixth embodiment of the anti-seepage zipper of this invention; Figure 7 is a cross-sectional view of the seventh embodiment of the anti-seepage zipper of this invention; Figure 8 is a cross-sectional view of the eighth embodiment of the anti-seepage zipper of this invention; and Figure 9 is a cross-sectional view of the ninth embodiment of the anti-seepage zipper of this case.

1: Zipper

11: Supporting fabric straps

11a: Side 1

11b: Side 2

11c: medial edge

11d: Medial surface

12: Central Gap

2: Continuous fastening elements

21: Top

22: Bottom surface

23: Snap-fit end

24: Inner cavity

25:Core wire

26:Seam

3:Joining line

4: First thermoplastic elastomer

41: Filling body

411: Left padding

411a: Left free end face

412: Right filling section

412a: Right free end face

42: Filling

43: The First Gap

5: Second thermoplastic elastomer

51: Expander

511: Free end surface of expansion body

Claims (13)

A continuous fastening element anti-seepage zipper, comprising a pair of parallel supporting fabric strips, each of which has a first surface, a second surface opposite the first surface, an inner side surface, and an inner side edge; two rows of a plurality of continuous fastening elements, which are arranged oppositely on the inner side edge of the second surface of each supporting fabric strip or an outer side edge of the first surface that is folded back in a reverse shape; when the anti-seepage zipper is in a fastened state, a first thermoplastic elastic body is filled in at least a central gap between the pair of inner side surfaces. A portion of the fastening elements is formed to form a filling body located in the central gap, and further penetrates into each gap between the fastening ends of the fastening elements and the core wire and/or the at least one bonding line of the opposite fastening elements to form a filling portion. The filling body includes at least a left filling portion and a right filling portion, each of which has a left free end surface, a right free end surface, and a first gap between the free end surfaces. The invention is characterized by further having: An expansion body formed of a second thermoplastic elastomer, at least a portion of the expansion body being bonded to the left free end surface or the right free end surface, the expansion body having an expansion body free end surface; when the anti-seepage zipper is fastened and no external force is applied, the expansion body free end surface abuts against the free end surface of the opposite filling portion. As described in claim 1 of the continuous fastening element anti-seepage zipper, the left filling portion and the right filling portion have different widths, and at least a portion of the expansion body is coupled to the free end surface of the filling portion with the smaller width. The continuous fastening element anti-seepage zipper as described in item 1 of the patent application scope, wherein a waterproof layer is provided on at least the first surface of the pair of supporting fabric strips, and the waterproof layer covers the left filling portion and the right filling portion. The continuous fastening element anti-seepage zipper as described in item 1 of the patent application scope, wherein a waterproof layer is provided on at least the first surface of the pair of supporting fabric strips, and the waterproof layer covers the left filling portion, the expansion body and the right filling portion. The continuous fastening element anti-seepage zipper as described in item 3 of the patent application scope, wherein the first thermoplastic elastomer forms the waterproof layer, the filling portion and the caulking portion are integrally connected, and the filling portion is divided at the central gap to form the left filling portion, the right filling portion and the slit. As described in item 1 of the patent application, the continuous fastening element anti-seepage zipper, wherein a waterproof layer is provided on at least the first surface of the pair of supporting fabric strips, and the waterproof layer further extends to cover the free end surface of the expansion body and the free end surface of the opposite filling portion. The continuous fastening element waterproof zipper as described in item 1 of the patent application, wherein at least one of the first and second surfaces of the pair of supporting fabric tapes is impregnated or coated with a bonding agent to improve the bonding strength of the waterproof layer. As described in claim 1 of the patent application, the continuous fastening element anti-seepage zipper, wherein at least one of the first and second surfaces of the pair of supporting fabric strips is treated with a water repellent to impart a water-repellent property to the pair of supporting fabric strips. As described in item 1 of the patent application, the continuous fastening element anti-seepage zipper, wherein the free end surface of the expansion body is bonded to the free end surface of the opposite filling portion through a bonding process to form an assembly, and the assembly is divided substantially along a centerline of the central gap to form a left assembly, a right assembly, and a third gap, wherein the left assembly has a left assembly free end surface, and the right assembly has a right assembly free end surface; when the anti-seepage zipper is fastened and no external force is applied, the free end surface of the left assembly and the free end surface of the right assembly abut against each other. The continuous fastening element anti-seepage zipper as described in item 9 of the patent application scope, wherein a waterproof layer is provided on at least the first surface of the pair of supporting fabric strips, and the waterproof layer covers the left assembly and the right assembly. As described in item 9 of the patent application, the continuous fastening element anti-seepage zipper, wherein a covering layer is provided on at least a portion of the first surface of the pair of supporting fabric tapes, and the covering layer further extends to cover the free end surface of the left assembly and the free end surface of the right assembly. A daily item with an opening and closing function is provided with a continuous fastening element anti-seepage zipper as described in any one of items 1 to 11 of the patent application scope to provide the opening and closing function. As described in item 12 of the patent application, the daily necessities with an opening and closing function are selected from the group consisting of clothing, carrying devices and camping equipment.