Adhesive seam films and seams formed therefrom

Abstract

An adhesive seam film includes an adhesive film composition. Based on the total weight of the adhesive film composition, the adhesive film composition comprises 21 wt% to 85 wt% of a styrene-ethylene / butylene-styrene triblock copolymer, 15 wt% to 35.5 wt% of a white mineral oil, and 0 wt% to 40 wt% of a tackifier. Based on the total weight of the styrene-ethylene / butylene-styrene triblock copolymer, the weight average molecular weight of the styrene-ethylene / butylene-styrene triblock copolymer is 90000 g / mol to 140000 g / mol, and the bound styrene content is 28 wt% to 35 wt%. The tackifier has a weight average molecular weight of 500 g / mol to 5000 g / mol, a glass transition temperature of 50 DEG C to 100 DEG C, and a softening temperature of 100 DEG C to 140 DEG C. The adhesive seam film has a thickness of 25 m to 250 m.

Description

[0001] Claiming priority

[0002] This application claims priority to U.S. Provisional Patent Application Serial No. 63 / 466,995, filed May 16, 2023, Agent File No. 1202306, and U.S. Provisional Patent Application Serial No. 63 / 645,832, filed May 10, 2024, Agent File No. 1202402, the entire contents of which are incorporated herein by reference. Technical Field

[0003] Embodiments of this disclosure generally relate to adhesive seam films. More specifically, adhesive seam films comprise adhesive film compositions comprising a styrene-ethylene / butene-styrene triblock copolymer, a white mineral oil, and optionally a tackifier. Background Technology

[0004] Thermoplastic polyurethane compositions are commonly used in the apparel industry, such as in seamless adhesives, due to their desirable mechanical properties and durability. However, the use of thermoplastic polyurethane compositions can be prohibitively expensive. Furthermore, thermoplastic polyurethane compositions, along with other commonly used thermoplastic compositions, can be available in various forms, such as sprays or gels, which can be difficult to apply and cause unnecessary production delays.

[0005] Therefore, there is a need for cost-effective thermoplastic compositions that can form thin adhesive seam films. Summary of the Invention

[0006] Embodiments of this disclosure relate to adhesive seam films.

[0007] According to some embodiments, an adhesive seam film is provided. The adhesive seam film comprises an adhesive film composition. Based on the total weight of the adhesive film composition, the adhesive film composition comprises 21 wt% to 85 wt% of a styrene-ethylene / butene-styrene triblock copolymer, 27 wt% to 35.5 wt% of a white mineral oil, and 0 wt% to 40 wt% of a tackifier. Based on the total weight of the styrene-ethylene / butene-styrene triblock copolymer, the styrene-ethylene / butene-styrene triblock copolymer has a weight-average molecular weight of 90,000 g / mol to 140,000 g / mol and a bound styrene content of 15 wt% to 35 wt%. The tackifier has a weight-average molecular weight of 500 g / mol to 5,000 g / mol, a glass transition temperature of 50°C to 100°C, and a softening temperature of 100°C to 140°C. The thickness of the adhesive seam film is 25 µm to 250 µm.

[0008] According to some embodiments, a method for forming an adhesive seam film is provided. The method includes preparing an adhesive film composition and extruding the adhesive film composition to form an adhesive seam film with a thickness of 25 µm to 250 µm. Based on the total weight of the adhesive film composition, the adhesive film composition comprises 21 wt% to 85 wt% of a styrene-ethylene / butene-styrene triblock copolymer, 15 wt% to 35.5 wt% of a white mineral oil, and 0 wt% to 40 wt% of a tackifier. Based on the total weight of the styrene-ethylene / butene-styrene triblock copolymer, the styrene-ethylene / butene-styrene triblock copolymer has a weight-average molecular weight of 90,000 g / mol to 140,000 g / mol and a styrene content of 28 wt% to 35 wt%. The tackifier has a weight-average molecular weight of 500 g / mol to 5,000 g / mol, a glass transition temperature of 50°C to 100°C, and a softening temperature of 100°C to 140°C.

[0009] According to other embodiments, a method for preparing a seam is provided. The method includes: providing a first fabric segment, a second fabric segment, and a membrane; placing the membrane between the first and second fabric segments to form a seam segment; and heating the seam segment such that the membrane adheres to the first and second fabric segments. The second fabric segment at least partially overlaps the first fabric segment. The membrane comprises a membrane composition. Based on the total weight of the membrane composition, the membrane composition comprises 21% to 85% by weight of a styrene-ethylene / butene-styrene triblock copolymer, 15% to 35.5% by weight of a white mineral oil, and 0% to 40% by weight of a tackifier. Based on the total weight of the styrene-ethylene / butene-styrene triblock copolymer, the styrene-ethylene / butene-styrene triblock copolymer has a weight-average molecular weight of 90,000 g / mol to 140,000 g / mol and a styrene content of 28% to 35% by weight. The tackifier has a weight-average molecular weight of 500 g / mol to 5000 g / mol, a glass transition temperature of 50°C to 100°C, and a softening temperature of 100°C to 140°C. The adhesive seam film has a thickness of 25 µm to 250 µm.

[0010] Other features and advantages of the embodiments described herein will be set forth in the detailed description below, and will be readily understood by those skilled in the art through these descriptions, or recognized by practicing the embodiments described herein, including the following detailed description and claims. Attached Figure Description

[0011] Figure 1 An exemplary adhesive seam membrane according to one or more embodiments shown and described herein is depicted;

[0012] Figure 2 Exemplary multilayer composite materials according to one or more embodiments shown and described herein are depicted;

[0013] Figure 3 An exemplary multilayer composite material having an adhesive seam film adhered to a fabric backing is depicted according to one or more embodiments shown and described herein.

[0014] Figure 4 An exemplary multilayer composite material according to one or more embodiments shown and described herein is depicted, comprising an adhesive seam membrane adhered to a release liner;

[0015] Figure 5 Exemplary adhesive webbing according to one or more embodiments shown and described herein is depicted;

[0016] Figure 6 Exemplary seams according to one or more embodiments shown and described herein are depicted;

[0017] Figure 7 Another exemplary seam is depicted according to one or more embodiments shown and described herein; and

[0018] Figure 8 An exemplary seam with a stitch is depicted according to one or more embodiments shown and described herein. Detailed Implementation

[0019] Reference will now be made in detail to various embodiments of adhesive seam films and the seams formed therefrom.

[0020] This disclosure should not be construed as limiting itself to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the subject matter to those skilled in the art.

[0021] definition

[0022] Unless otherwise expressly defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0023] Unless otherwise expressly defined, no method disclosed herein should be construed as requiring its steps to be performed in a particular order, nor should any article described herein be construed as requiring a particular order or orientation of its individual components.

[0024] Unless otherwise expressly stated, any composition or mixture disclosed herein may contain, consist substantially of, or consist of the disclosed components.

[0025] Unless the context clearly indicates otherwise, the singular form of a term as used herein is intended to include the plural form of the term.

[0026] As used herein, numerical values ​​are not strictly limited to the exact values ​​stated herein. Rather, unless otherwise expressly stated, each numerical value implies both an exact value and an “approximate” value, which includes a range of functional equivalences around that value, and therefore any possibility can be considered as an implementation disclosed herein.

[0027] As used herein, the terms “adhesion / force” or “adhesive strength” refer to the ability of a material to adhere to another material, determined by peel force.

[0028] As used herein, the term "peel force" refers to the force required to separate two layers of fabric from the adhesive seam membrane, measured using an Instron tensile testing machine with the adhesive seam membrane positioned between two layers of fabric and bonded at 160°C and 35 kPa for 15 seconds. The fabric layers are mounted at both ends on the Instron tensile tester and pulled at a rate of 2 inches per minute to separate the two layers of fabric from the adhesive seam membrane. Peel force is provided in Newtons per linear meter (N / m).

[0029] As used herein, the term “elasticity” refers to the tensile properties of a material, determined by using a two-cycle 200% tensile test with a 200% measurement load.

[0030] As used herein, the term “elastic recovery” refers to the ability of a material to return to its original shape when the load is removed, determined by measuring hysteresis using a two-cycle 200% tensile test.

[0031] As used herein, the term "two-cycle 200% tensile test" refers to the following procedure. In the first cycle, a 1-inch long, 1-inch wide film is mounted in the fixture of an Instron tensile tester and stretched to 200% elongation at a rate of 10 inches per minute. The film is then held for 2 minutes within the extended period. After 2 minutes, Instron restores the film to its original 2-inch length and holds it in that position for one minute. In the second cycle, the film is again stretched to 200% elongation at a rate of 10 inches per minute. The film is then held in that extended position for 2 minutes, and the load on the film (i.e., the load at 200%) is measured. After 2 minutes, Instron restores the film to its original 2-inch length and holds it in that position for one minute. After the second cycle, hysteresis is measured by determining the length of the deformed film and calculating the percentage difference between the original 2-inch length and the deformed length. For example, if after two cycles the film becomes 2.4 inches long due to permanent deformation, it is considered to have 20% hysteresis.

[0032] As used herein, the term "surface tack" refers to the strength to which an adhesive seam film can adhere to itself.

[0033] As used in this article, the term "polydispersity" refers to a measure of molecular weight distribution, which is calculated by dividing the weight-average molecular weight (MW) by the number-average molecular weight (MN).

[0034] As used herein, the term “weight-average molecular weight” refers to the weighted sum of all molecular weights in a population, where the weighting factor is the mole fraction of the total weight of all molecules in the polymer by the total number of chains, as measured by gel permeation chromatography (GPC) using polystyrene standards.

[0035] As used herein, the term “number-average molecular weight” refers to the statistical average molecular weight of all polymer chains in a sample, and is the sum of the weights of all chains in the polymer divided by the total number of chains, as measured using polystyrene standards according to gel permeation chromatography (GPC) and size exclusion chromatography (SEC).

[0036] As used herein, the term “glass transition temperature” refers to the temperature at which an amorphous polymer changes from a hard / glassy state to a soft / leathery state, and vice versa.

[0037] As used herein, the term "softening temperature" refers to the temperature at which a polymer flows under load when heated.

[0038] As used herein, the term "film" refers to a thin, continuous material with a thickness of 350 µm or less.

[0039] As used herein, the term “thin adhesive seam membrane” refers to a membrane with a thickness of 250 µm or less.

[0040] As used herein, the term "melt flow rate" refers to the ease with which a flow of molten material passes through an orifice at a specified temperature and load, as measured according to ASTM D1238. The term "melt flow index" can also be used to refer to melt flow rate.

[0041] As used herein, the term "formed from" (including related terms such as "formed from") and the adhesive film composition refer to an article (or article component) being partially or entirely made of the adhesive film composition by extrusion, molding, shaping, pressing, or otherwise subjected to adequate heating (to achieve such shaping). Thus, in some embodiments, the term "formed from" (including related terms such as "formed from") means that the article (or article component) may comprise, consist substantially of, or be composed of an adhesive film composition; and in other embodiments, the article (or article component) is composed of an adhesive film composition because the article (or article component) is made, for example, by an extrusion or molding process.

[0042] practicality

[0043] As discussed above, thermoplastic polyurethane compositions are commonly used in the apparel industry, such as in seamless elastic bands, due to their desirable mechanical properties and durability. However, the use of thermoplastic polyurethane compositions can be prohibitively expensive. Furthermore, thermoplastic polyurethane compositions, along with other commonly used thermoplastic compositions, can be in various forms, such as sprays or gels, which are difficult to apply and can cause unnecessary production delays.

[0044] This document discloses adhesive film compositions. More specifically, the adhesive film compositions disclosed herein comprise a styrene-ethylene / butene-styrene triblock copolymer, a white mineral oil, and optionally a tackifier. Advantageously, the styrene-ethylene / butene-styrene triblock copolymer, the white mineral oil, and optionally the tackifier contribute to achieving adhesive film compositions that can be used to form thin adhesive seam films. Furthermore, the adhesive film compositions can exhibit desired adhesion or bond strength, elasticity, elastic recovery, and / or surface tack.

[0045] Therefore, adhesive film compositions can be used to form any article requiring a thin adhesive seam film or webbing. Adhesive film compositions are particularly useful in the seamless construction of performance clothing, close-fitting garments, casual wear, and commercial underwear.

[0046] The adhesive film compositions described herein, and the adhesive film compositions disclosed herein, comprise styrene-ethylene / butene-styrene triblock copolymers, white mineral oil, and optional tackifiers.

[0047] Styrene-ethylene / butene-styrene triblock copolymer

[0048] The adhesive film composition disclosed herein comprises a styrene-ethylene / butene-styrene triblock copolymer. The styrene-ethylene / butene-styrene triblock copolymer imparts adhesion, elasticity, and surface tack to the adhesive film composition.

[0049] In some embodiments, the adhesive film composition may contain a minimum amount of styrene-ethylene / butene-styrene triblock copolymer (e.g., greater than or equal to 21% by weight) such that the adhesive film composition has a minimum melt flow rate suitable for film formation (e.g., greater than or equal to 8 g / 10 min measured at 175°C under a 2.16 kg load) and imparts adhesive film composition with adhesion, elasticity, and surface tack. The amount of styrene-ethylene / butene-styrene triblock copolymer may be limited (e.g., less than or equal to 85% by weight) to achieve the desired elasticity and keep the melt flow rate below a certain threshold (e.g., less than or equal to 60 g / 10 min, measured at 175°C and a 2.16 kg load) so that the adhesive film composition can be processed into a film. Therefore, in some embodiments, the adhesive film composition may contain 21% to 85% by weight of styrene-ethylene / butene-styrene triblock copolymer based on the total weight of the adhesive film composition. In some embodiments, based on the total weight of the adhesive film composition, the amount of styrene-ethylene / butene-styrene triblock copolymer in the adhesive film composition may be greater than or equal to 21% by weight, greater than or equal to 25% by weight, greater than or equal to 30% by weight, greater than or equal to 35% by weight, or even greater than or equal to 40% by weight. In some embodiments, based on the total weight of the adhesive film composition, the amount of styrene-ethylene / butene-styrene triblock copolymer in the adhesive film composition may be less than or equal to 85% by weight, less than or equal to 80% by weight, less than or equal to 65% by weight, less than or equal to 60% by weight, less than or equal to 55% by weight, less than or equal to 53% by weight, less than or equal to 50% by weight, or even less than or equal to 47% by weight.In some embodiments, the amount of styrene-ethylene / butene triblock copolymer in the adhesive film composition can be 21% to 85% by weight, 21% to 80% by weight, 21% to 65% by weight, 21% to 60% by weight, 21% to 55% by weight, 21% to 53% by weight, 21% to 50% by weight, 21% to 47% by weight, 25% to 85% by weight, 25% to 80% by weight, 25% to 65% by weight, 25% to 60% by weight, 25% to 55% by weight, 25% to 53% by weight, 25% to 50% by weight, 25% to 47% by weight, 30% to 85% by weight, 30% to 80% by weight, and 30% to 65% by weight, based on the total weight of the adhesive film composition. %, 30% to 60% by weight, 30% to 55% by weight, 30% to 53% by weight, 30% to 50% by weight, 30% to 47% by weight, 35% to 85% by weight, 35% to 80% by weight, 35% to 65% by weight, 35% to 60% by weight, 35% to 55% by weight, 35% to 53% by weight, 35% to 50% by weight, 35% to 47% by weight, 40% to 85% by weight, 40% to 80% by weight, 40% to 65% by weight, 40% to 60% by weight, 40% to 55% by weight, 40% to 53% by weight, 40% to 50% by weight or even 40% to 47% by weight, or any and all subranges formed by any of these endpoints.

[0050] The amount of styrene-ethylene / butene-styrene triblock copolymer included in the adhesive film composition can depend on the weight-average molecular weight of the styrene-ethylene / butene-styrene triblock copolymer. As the weight-average molecular weight of the styrene-ethylene / butene-styrene triblock copolymer increases, the amount of styrene-ethylene / butene-styrene triblock copolymer in the adhesive film composition can be adjusted accordingly. For example, if a styrene-ethylene / butene-styrene triblock copolymer with a weight-average molecular weight of 140,000 g / mol is used, a relatively low weight percentage, such as about 21% by weight based on the total weight of the adhesive film composition, can be included to achieve the desired performance.

[0051] As another example, if a styrene-ethylene / butene-styrene triblock copolymer with a weight-average molecular weight of 90,000 g / mol is used, a relatively high weight percentage, such as approximately 55% by weight of styrene-ethylene / butene-styrene triblock copolymer based on the total weight of the adhesive film composition, can be included to achieve the desired performance.

[0052] In some embodiments, the styrene-ethylene / butene-styrene triblock copolymer may have a minimum molecular weight (e.g., greater than or equal to 90,000 g / mol) to impart elastic recovery to the adhesive film composition. The molecular weight of the styrene-ethylene / butene-styrene triblock copolymer may be limited (e.g., less than or equal to 140,000 g / mol) to allow the adhesive film composition to be formed into films or tapes. Therefore, in some embodiments, the weight-average molecular weight of the styrene-ethylene / butene-styrene triblock copolymer may be from 90,000 g / mol to 140,000 g / mol.

[0053] In some embodiments, the styrene-ethylene / butene-styrene triblock copolymer may have a minimum bound styrene content (e.g., greater than or equal to 28% by weight), such that styrene-ethylene-butene-styrene separates into distinct rubber and plastic phases in the adhesive film composition. The weight percentage of bound styrene content may be limited (e.g., less than or equal to 35% by weight) to balance the elastic and plastic phases in the adhesive film composition, thereby achieving elastic recovery. Therefore, in some embodiments, the bound styrene content of the styrene-ethylene / butene-styrene triblock copolymer may be from 28% to 35% by weight, based on the total weight of the styrene-ethylene / butene-styrene triblock copolymer. In some embodiments, the bound styrene content of the styrene-ethylene / butene-styrene triblock copolymer may be greater than or equal to 28% by weight, greater than or equal to 28.5% by weight, or even greater than or equal to 29% by weight, based on the total weight of the styrene-ethylene / butene-styrene triblock copolymer. In some embodiments, the bound styrene content of the styrene-ethylene / butene-styrene triblock copolymer may be less than or equal to 35% by weight, less than or equal to 33% by weight, or even less than or equal to 30% by weight, based on the total weight of the styrene-ethylene / butene-styrene triblock copolymer. In some embodiments, the bound styrene content of the styrene-ethylene / butene-styrene triblock copolymer may be 28% to 35% by weight, 28% to 33% by weight, 28% to 30% by weight, 28.5% to 35% by weight, 28.5% to 33% by weight, 28.5% to 30% by weight, 29% to 35% by weight, 29% to 33% by weight, or even 29% to 30% by weight, or any and all subranges formed by any of these endpoints.

[0054] In some embodiments, the styrene-ethylene / butene-styrene triblock copolymer may have a polydispersity of 1.0 to 3.0, allowing the adhesive film composition to flow and thus enabling it to be prepared into a film or tape. In some embodiments, the polydispersity of the styrene-ethylene / butene-styrene triblock copolymer may be greater than or equal to 1.0, greater than or equal to 1.1, or even greater than or equal to 1.2. In some embodiments, the polydispersity of the styrene-ethylene / butene-styrene triblock copolymer may be less than or equal to 1.3, less than or equal to 1.2, or even less than or equal to 1.1. In some embodiments, the polydispersity of the styrene-ethylene / butene-styrene triblock copolymer may be 1.0 to 1.3, 1.0 to 1.2, 1.0 to 1.1, 1.1 to 1.3, 1.1 to 1.2, or even 1.2 to 1.3, or any and all subranges formed by any of these endpoints.

[0055] Suitable styrene-ethylene / butene-styrene triblock copolymers are available from Kraton's KRATON brand, such as grade G1650.

[0056] In some embodiments, the adhesive film composition may include a maleic anhydride-grafted styrene-ethylene / butene-styrene triblock copolymer. The maleic anhydride-grafted styrene-ethylene / butene-styrene triblock copolymer comprises maleic anhydride residues grafted onto the styrene-ethylene / butene-styrene triblock copolymer, the maleic anhydride residues being grafted onto, for example, ethylene / butene blocks. Suitable maleic anhydride-grafted styrene-ethylene / butene-styrene triblock copolymers are available from Kraton's KRATON brand, such as FG1901 G grade.

[0057] In some embodiments, the maleic anhydride-grafted styrene-ethylene / butene-styrene triblock copolymer may have a minimum molecular weight (e.g., greater than or equal to 5000 g / mol). The molecular weight of the maleic anhydride-grafted styrene-ethylene / butene-styrene triblock copolymer may be limited (e.g., less than or equal to 200000 g / mol). Therefore, in some embodiments, the weight-average molecular weight of the styrene-ethylene / butene-styrene triblock copolymer may be from 5000 g / mol to 200000 g / mol, 7000 g / mol to 150000 g / mol, 9000 g / mol to 140000 g / mol, 10000 g / mol to 120000 g / mol, 20000 g / mol to 80000 g / mol, or any and all subranges formed from any of these endpoints.

[0058] In some embodiments, the maleic anhydride-grafted styrene-ethylene / butene-styrene triblock copolymer may have a minimum bound styrene content (e.g., greater than or equal to 28% by weight). In some embodiments, the maleic anhydride-grafted styrene-ethylene / butene-styrene triblock copolymer may have a maximum bound styrene content (e.g., less than or equal to 35% by weight). Therefore, in some embodiments, based on the total weight of the maleic anhydride-grafted styrene-ethylene / butene-styrene triblock copolymer, the bound styrene content of the maleic anhydride-grafted styrene-ethylene / butene-styrene triblock copolymer may be from 28% to 35% by weight. In some embodiments, based on the total weight of the maleic anhydride-grafted styrene-ethylene / butene-styrene triblock copolymer, the bound styrene content of the maleic anhydride-grafted styrene-ethylene / butene-styrene triblock copolymer may be greater than or equal to 28% by weight, greater than or equal to 28.5% by weight, or even greater than or equal to 29% by weight. In some embodiments, based on the total weight of the maleic anhydride-grafted styrene-ethylene / butene-styrene triblock copolymer, the bound styrene content of the maleic anhydride-grafted styrene-ethylene / butene-styrene triblock copolymer may be less than or equal to 35% by weight, less than or equal to 33% by weight, or even less than or equal to 30% by weight. In some embodiments, based on the total weight of the maleic anhydride-grafted styrene-ethylene / butene-styrene triblock copolymer, the bound styrene content of the maleic anhydride-grafted styrene-ethylene / butene-styrene triblock copolymer may be 28% to 35% by weight, 28% to 33% by weight, 28% to 30% by weight, 28.5% to 35% by weight, 28.5% to 33% by weight, 28.5% to 30% by weight, 29% to 35% by weight, 29% to 33% by weight, or even 29% to 30% by weight, or any and all subranges formed by any of these endpoints.

[0059] In some embodiments, the maleic anhydride-grafted styrene-ethylene / butene-styrene triblock copolymer may have a minimum maleic anhydride content (e.g., greater than or equal to 0.9 wt%). In some embodiments, the maleic anhydride-grafted styrene-ethylene / butene-styrene triblock copolymer may have a maximum maleic anhydride content (e.g., less than or equal to 2 wt%). Therefore, in some embodiments, based on the total weight of the maleic anhydride-grafted styrene-ethylene / butene-styrene triblock copolymer, the maleic anhydride content of the maleic anhydride-grafted styrene-ethylene / butene-styrene triblock copolymer may be from 0.9 wt% to 2 wt%. In some embodiments, based on the total weight of the maleic anhydride-grafted styrene-ethylene / butene-styrene triblock copolymer, the maleic anhydride content of the maleic anhydride-grafted styrene-ethylene / butene-styrene triblock copolymer may be greater than or equal to 0.9 wt%, greater than or equal to 1 wt%, or even greater than or equal to 1.3 wt%. In some embodiments, based on the total weight of the maleic anhydride-grafted styrene-ethylene / butene-styrene triblock copolymer, the maleic anhydride content of the maleic anhydride-grafted styrene-ethylene / butene-styrene triblock copolymer may be less than or equal to 2 wt%, less than or equal to 1.9 wt%, or even less than or equal to 1.8 wt%. In some embodiments, based on the total weight of the maleic anhydride-grafted styrene-ethylene / butene-styrene triblock copolymer, the maleic anhydride content of the maleic anhydride-grafted styrene-ethylene / butene-styrene triblock copolymer may be 0.9 wt% to 2 wt%, 0.9 wt% to 1.9 wt%, 0.9 wt% to 1.8 wt%, 1 wt% to 2 wt%, 1 wt% to 1.9 wt%, 1 wt% to 1.8 wt%, 1.3 wt% to 2 wt%, 1.3 wt% to 1.9 wt%, or even 1.3 wt% to 1.8 wt%, or any and all subranges formed by any of these endpoints.

[0060] In some embodiments, the ratio of the styrene-ethylene / butene-styrene triblock copolymer to the maleic anhydride-grafted styrene-ethylene / butene-styrene triblock copolymer can be as high as 1:1. In some embodiments, the ratio of the styrene-ethylene / butene-styrene triblock copolymer to the maleic anhydride-grafted styrene-ethylene / butene-styrene triblock copolymer can be from 1:1 to 100:1, 1:0.9 to 90:1, 1:0.8 to 80:1, 1:0.7 to 70:1, 1:0.6 to 60:1, or any and all subranges formed from any of these endpoints.

[0061] In some embodiments, the adhesive film composition may contain a minimum amount of maleic anhydride-grafted styrene-ethylene / butene-styrene triblock copolymer (e.g., greater than or equal to 0.5 wt%). The amount of maleic anhydride-grafted styrene-ethylene / butene-styrene triblock copolymer may be limited (e.g., less than or equal to 42.5 wt%). Therefore, in some embodiments, based on the total weight of the adhesive film composition, the adhesive film composition may contain from 0.5 wt% to 42.5 wt% of maleic anhydride-grafted styrene-ethylene / butene-styrene triblock copolymer. In some embodiments, based on the total weight of the adhesive film composition, the amount of maleic anhydride-grafted styrene-ethylene / butene-styrene triblock copolymer in the adhesive film composition may be greater than or equal to 0.5 wt%, greater than or equal to 1 wt%, greater than or equal to 3 wt%, greater than or equal to 5 wt%, or even greater than or equal to 10 wt%. In some embodiments, based on the total weight of the adhesive film composition, the amount of styrene-ethylene / butene-styrene triblock copolymer in the adhesive film composition may be less than or equal to 42.5% by weight, less than or equal to 40% by weight, less than or equal to 32% by weight, less than or equal to 25% by weight, less than or equal to 22% by weight, less than or equal to 20% by weight, less than or equal to 17% by weight, or even less than or equal to 15% by weight. In some embodiments, based on the total weight of the adhesive film composition, the amount of styrene-ethylene / butene triblock copolymer in the adhesive film composition can be from 0.5 wt% to 42.5 wt%, 0.5 wt% to 40 wt%, 0.5 wt% to 32 wt%, 0.5 wt% to 22 wt%, 0.5 wt% to 20 wt%, 0.5 wt% to 17 wt%, 0.5 wt% to 15 wt%, 1 wt% to 42.5 wt%, 1 wt% to 40 wt%, 1 wt% to 32 wt%, 1 wt% to 22 wt%, 1 wt% to 20 wt%, 1 wt% to 17 wt%, 1 wt% to 15 wt%, 3 wt% to 42.5 wt%, 3 wt% to 40 wt%. %, 3% to 32% by weight, 3% to 22% by weight, 3% to 20% by weight, 3% to 17% by weight, 3% to 15% by weight, 5% to 42.5% by weight, 5% to 40% by weight, 5% to 32% by weight, 5% to 22% by weight, 5% to 20% by weight, 5% to 17% by weight, 5% to 15% by weight, 10% to 42.5% by weight, 10% to 40% by weight, 10% to 32% by weight, 10% to 22% by weight, 10% to 20% by weight, 10% to 17% by weight, 10% to 15% by weight, or any and all subranges formed by any of these endpoints.

[0062] White mineral oil

[0063] The adhesive film compositions disclosed herein contain a white mineral oil. The white mineral oil is included in the adhesive film compositions to impart processability, for example, to allow the adhesive film compositions to be extruded and formed into films. The white mineral oil also balances the viscosity and melt flow rate of the adhesive film compositions at processing temperatures to allow the adhesive film compositions to be extruded and formed into thin films.

[0064] In some embodiments, the adhesive film composition may contain a minimum amount of white mineral oil (e.g., greater than or equal to 27% by weight) to ensure that the adhesive film composition has a limited melt flow rate (e.g., less than or equal to 60 g / 10 min, measured at 175°C and 2.16 kg load) so that the adhesive film composition can diffuse and flow during processing to form an adhesive seam film with a thickness of less than or equal to 250 µm. The amount of white mineral oil may be limited (e.g., less than or equal to 35.5% by weight) to keep the melt flow rate above a certain threshold (e.g., greater than or equal to 8 g / 10 min, measured at 175°C and 2.16 kg load), thereby preventing the adhesive film composition from breaking when processed into an adhesive seam film. Therefore, in some embodiments, the adhesive film composition may contain 15% to 35.5% by weight of white mineral oil based on the total weight of the adhesive film composition. In some embodiments, based on the total weight of the adhesive film composition, the amount of white mineral oil can be greater than or equal to 15% by weight, greater than or equal to 20% by weight, greater than or equal to 22% by weight, greater than or equal to 25% by weight, greater than or equal to 27% by weight, greater than or equal to 30% by weight, or even greater than or equal to 33% by weight. In some embodiments, based on the total weight of the adhesive film composition, the amount of white mineral oil in the adhesive film composition can be less than or equal to 35.5% by weight, less than or equal to 35% by weight, or even less than or equal to 34.5% by weight. In some embodiments, based on the total weight of the adhesive film composition, the amount of white mineral oil in the adhesive film composition can be from 15% to 35.5% by weight, 15% to 35% by weight, 15% to 34.5% by weight, 20% to 35.5% by weight, 20% to 35% by weight, 20% to 34.5% by weight, 22% to 35.5% by weight, 22% to 35% by weight, 22% to 34.5% by weight, and 25% to 35.5% by weight. %, 25% to 35% by weight, 25% to 34.5% by weight, 27% to 35.5% by weight, 27% to 35% by weight, 27% to 34.5% by weight, 30% to 35.5% by weight, 30% to 35% by weight, 30% to 34.5% by weight, 33% to 35.5% by weight, 33% to 35% by weight or even 33% to 34.5% by weight, or any and all subranges formed by any of these endpoints.

[0065] Suitable white mineral oils are available from Sonneborn under the brand name HYDROBRITE, such as grades 380, 100, and 550.

[0066] Tackifier

[0067] The adhesive film compositions disclosed herein optionally include a tackifier. The tackifier may be included in the adhesive film composition to impart adhesion and surface tack.

[0068] The adhesive film composition may contain a minimum amount of tackifier (i.e., greater than 0 wt%) to impart adhesiveness to the adhesive film composition. The amount of tackifier may be limited (e.g., less than or equal to 40 wt%) to ensure that the surface tack is below a certain threshold to allow for processing and handling in equipment. Therefore, in some embodiments, the adhesive film composition may contain 0 wt% to 40 wt% of tackifier based on the total weight of the adhesive film composition. In some embodiments, the amount of tackifier based on the total weight of the adhesive film composition may be greater than or equal to 0 wt%, greater than or equal to 5 wt%, greater than or equal to 10 wt%, greater than or equal to 15 wt%, or even greater than or equal to 19 wt%. In some embodiments, the amount of tackifier in the adhesive film composition based on the total weight of the adhesive film composition may be less than or equal to 40 wt%, less than or equal to 35 wt%, less than or equal to 30 wt%, less than or equal to 27 wt%, less than or equal to 25 wt%, or even less than or equal to 23 wt%. In some embodiments, the amount of tackifier in the adhesive film composition can be 0 wt% to 40 wt%, 0 wt% to 35 wt%, 0 wt% to 30 wt%, 0 wt% to 27 wt%, 0 wt% to 25 wt%, 0 wt% to 23 wt%, 5 wt% to 40 wt%, 5 wt% to 35 wt%, 5 wt% to 30 wt%, 5 wt% to 27 wt%, 5 wt% to 25 wt%, 5 wt% to 23 wt%, 10 wt% to 40 wt%, 10 wt% to 35 wt%, 10 wt% to 30 wt%. 10% to 27% by weight, 10% to 25% by weight, 10% to 23% by weight, 15% to 40% by weight, 15% to 35% by weight, 15% to 30% by weight, 15% to 27% by weight, 15% to 25% by weight, 15% to 23% by weight, 19% to 40% by weight, 19% to 35% by weight, 19% to 30% by weight, 19% to 27% by weight, 19% to 25% by weight, or even 19% to 23% by weight, or any and all subranges formed by any of these endpoints.

[0069] In some embodiments, the tackifier may have a minimum molecular weight (e.g., greater than or equal to 500 g / mol) to keep the viscosity below a certain threshold, thereby enabling the formation of a film. The molecular weight of the tackifier may be limited (e.g., less than or equal to 5000 g / mol) to allow the tackifier to disperse in the adhesive film composition and associate with other compounds in the adhesive film composition. Therefore, in some embodiments, the molecular weight of the tackifier may be from 500 g / mol to 5000 g / mol. In some embodiments, the molecular weight of the tackifier in the adhesive film composition may be greater than or equal to 500 g / mol, greater than or equal to 1000 g / mol, or even greater than or equal to 2000 g / mol. In some embodiments, the molecular weight of the tackifier in the adhesive film composition may be less than or equal to 5000 g / mol, less than or equal to 4000 g / mol, or even less than or equal to 3000 g / mol. In some embodiments, the molecular weight of the tackifier in the adhesive film composition may be from 500 g / mol to 5000 g / mol, 500 g / mol to 4000 g / mol, 500 g / mol to 3000 g / mol, 1000 g / mol to 5000 g / mol, 1000 g / mol to 4000 g / mol, 1000 g / mol to 3000 g / mol, 2000 g / mol to 5000 g / mol, 2000 g / mol to 4000 g / mol, or even 2000 g / mol to 3000 g / mol, or any and all subranges formed from any of these endpoints.

[0070] In some embodiments, the tackifier may have a minimum glass transition temperature (e.g., greater than or equal to 50°C) to prevent the adhesive film composition from softening at ambient temperature or the wearer's body temperature. The glass transition temperature of the tackifier may be limited (e.g., less than or equal to 100°C) to allow the adhesive film composition to flow at the temperature at which the adhesive seam film containing the adhesive film composition bonds to the fabric. Therefore, in some embodiments, the glass transition temperature of the tackifier may be between 50°C and 100°C. In some embodiments, the glass transition temperature of the tackifier in the adhesive film composition may be greater than or equal to 50°C, greater than or equal to 60°C, or even greater than or equal to 75°C. In some embodiments, the glass transition temperature of the tackifier may be less than or equal to 100°C, less than or equal to 90°C, or even less than or equal to 80°C. In some embodiments, the glass transition temperature of the tackifier in the adhesive film composition may be 50°C to 100°C, 50°C to 90°C, 50°C to 80°C, 60°C to 100°C, 60°C to 90°C, 60°C to 80°C, 75°C to 100°C, 75°C to 90°C, or even 75°C to 80°C, or any and all subranges formed by any of these endpoints.

[0071] In some embodiments, the tackifier may include a minimum softening temperature (e.g., greater than or equal to 100°C) to allow the adhesive film composition to flow at the temperature at which the adhesive seam film containing the adhesive film composition is bonded to the fabric. The softening temperature of the tackifier may be limited (e.g., less than or equal to 140°C) to allow the adhesive seam film containing the adhesive film composition to melt and flow at the temperature at which the film is bonded to the fabric. Therefore, in some embodiments, the softening temperature of the tackifier may be between 100°C and 140°C. In some embodiments, the softening temperature of the tackifier in the adhesive film composition may be greater than or equal to 100°C, greater than or equal to 110°C, or even greater than or equal to 120°C. In some embodiments, the softening temperature of the tackifier may be less than or equal to 140°C, less than or equal to 135°C, or even less than or equal to 125°C. In some embodiments, the softening temperature of the tackifier in the adhesive film composition may be 100°C to 140°C, 100°C to 135°C, 100°C to 125°C, 110°C to 140°C, 110°C to 135°C, 110°C to 125°C, 120°C to 140°C, 120°C to 135°C, or even 120°C to 135°C, or any and all subranges formed by any of these endpoints.

[0072] The glass transition temperature and softening temperature of a tackifier can vary depending on its weight-average molecular weight. Therefore, the weight-average molecular weight of a tackifier can be selected based on the desired glass transition temperature and softening temperature. As the weight-average molecular weight increases, the glass transition temperature and softening temperature also increase. The softening temperature refers to the temperature at which the tackifier bonds to the fabric to form a seam. For example, if it is desired to bond the adhesive film composition to the fabric at a temperature of 100°C, a tackifier with a weight-average molecular weight close to 500 g / mol can be selected. As another example, if it is desired to bond the adhesive film composition to the fabric at a temperature of 140°C, a tackifier with a weight-average molecular weight close to 5,000 g / mol can be selected.

[0073] Suitable tackifiers are available from Synthomer under the brand name PLASTOLYN (e.g., grade 290), Synthomer under the brand name KRISTALEX (e.g., grade 5140), and ExxonMobil under the brand name ESCOREZ (e.g., grade 5300).

[0074] In some embodiments, the tackifier may be a mezzanine block associative tackifier with affinity for the mezzanine block (e.g., the ethylene / butene block) of a styrene-ethylene / butene-styrene triblock copolymer. Available mezzanine block associative tackifiers include, for example, natural and modified rosin, glycerol and pentaerythritol esters of natural and modified rosin, copolymers and terpolymers of natural terpenes, polyterpene resins, phenol-modified terpene resins and their hydrogenated derivatives, aliphatic petroleum hydrocarbon resins, alicyclic petroleum hydrocarbon resins and their hydrogenated derivatives, and aromatic / aliphatic or alicyclic hydrocarbon resins. Suitable mezzanine block associative tackifiers may be marketed by ExxonMobil under the brand name ESCOREZ, for example, grade 5300.

[0075] Other additives

[0076] In some embodiments, the adhesive film composition disclosed herein may also contain one or more optional other additives.

[0077] Other suitable additives may include conventional or commercially available plastic additives. Those skilled in the art of thermoplastic compounding can select suitable additives from available references, such as the Plastics Additives Database in the Plastics Design Library (Elsevier 2004), without much experimentation.

[0078] Other optional additives may be used in any amount sufficient to achieve the desired processing or properties of the material or article formed therefrom. This amount should not result in waste of the additive, nor should it be detrimental to the processing or properties of the material or article formed therefrom.

[0079] Non-limiting examples of optional additives may include one or more of the following: antioxidants; nucleating agents; colorants (e.g., pigments and / or dyes); inorganic mineral fillers; mineral oils; flame retardants; glass beads, glass flakes and glass fibers; impact modifiers; mica; slip agents and anti-sticking agents; UV absorbers; and waxes.

[0080] Method for preparing adhesive film compositions

[0081] In some embodiments, the method of preparing the adhesive film composition may include combining a styrene-ethylene / butene-styrene triblock copolymer, a white mineral oil, and an optional tackifier, as disclosed herein, for example, using a single-screw extruder or a twin-screw extruder.

[0082] The extruder can operate at the following temperatures: 125°C to 450°C, 125°C to 400°C, 125°C to 375°C, 180°C to 450°C, 180°C to 400°C, 180°C to 375°C, 200°C to 450°C, 200°C to 400°C, or even 200°C to 375°C, or any and all subranges formed by any of these endpoints.

[0083] The extruder can operate at the following shear rates: 100 s -1 Up to 10000 s -1 100 s -1 Up to 5000 s -1 100s -1 up to 2500 s -1 500 s -1 Up to 10000 s -1 500 s -1 Up to 5000 s -1 500 s -1 up to 2500 s -1 1000 s -1 Up to 10000 s -1 1000 s -1 Up to 5000 s -1 or even 1000 s -1 up to 2500 s -1 , or any and all subranges formed by any of these endpoints.

[0084] Operating the extruder at the temperatures and shear rates disclosed herein ensures the flow and uniform mixing of the styrene-ethylene / butene-styrene triblock copolymer, white mineral oil, and optional tackifier. In some embodiments, the adhesive film composition may be granulated after extrusion.

[0085] Adhesive film composition

[0086] As described herein, styrene-ethylene / butene-styrene triblock copolymer, white mineral oil, and optional tackifiers contribute to the realization of adhesive film compositions that can be used to form thin adhesive seam films. Furthermore, the adhesive film compositions can exhibit desired adhesion or bond strength, elasticity, elastic recovery, and / or surface tack.

[0087] The ability to prepare thin adhesive seam films from adhesive film compositions depends on various properties of the adhesive film composition and the quantity and properties of each component in the composition. Relevant properties of the adhesive film composition may include elasticity, elastic recovery, melt flow rate, adhesion, and viscosity. Related properties of each component may include their molecular weight.

[0088] Advantageously, the selection and amount of the individual components of the adhesive film composition can be extruded into a thin adhesive seam film. The properties of the adhesive film composition are harmonized, thus enabling its processing into a thin adhesive seam. Therefore, changes to one or more properties can be offset by responsive changes to one or more other properties. However, in some cases, if one or more properties are too unbalanced, changes to one or more other properties may not be sufficient to form a thin adhesive seam film. Therefore, a balance of the amounts and properties of the individual components of the adhesive film composition may be important for achieving a thin adhesive seam film.

[0089] In some embodiments, the peel force of the adhesive film composition can be greater than or equal to 700 N / m or even 750 N / m, thereby ensuring adequate adhesion to a variety of materials such as nylon and polyester.

[0090] In some embodiments, the adhesive film composition may be subjected to a load of 200 kPa to 600 kPa, 200 kPa to 400 kPa, 300 kPa to 600 kPa, or even 300 kPa to 400 kPa at 200% to ensure that the adhesive film composition has sufficient elasticity so that the garment including the adhesive film composition is comfortable, while remaining in place and held on the wearer's body.

[0091] In some embodiments, the hysteresis percentage of the adhesive film composition may be less than or equal to 20%, less than or equal to 15%, less than or equal to 10%, less than or equal to 5%, less than or equal to 3%, less than or equal to 2%, less than or equal to 1%, less than or equal to 0.5%, or even less than or equal to 0.1% to ensure that the adhesive film composition has sufficient elastic recovery. In some embodiments, the adhesive film composition may have a hysteresis percentage of 0%.

[0092] In some embodiments, as measured according to ASTM D1238 at 175°C and a 2.16 kg load, the melt index of the adhesive film composition can be from 8 g / 10 min to 60 g / 10 min to ensure that the adhesive film composition has sufficient flowability for processing, particularly for film formation. In some embodiments, as measured according to ASTM D1238 at 175°C and a 2.16 kg load, the melt index of the adhesive film composition can be greater than or equal to 8 g / 10 min, greater than or equal to 12 g / min, or even greater than or equal to 16 g / min. In some embodiments, as measured according to ASTM D1238 at 175°C and a 2.16 kg load, the melt index of the adhesive film composition can be less than or equal to 60 g / 10 min, less than or equal to 40 g / min, or even less than or equal to 25 g / min. In some embodiments, as measured according to ASTM D1238 at 175°C and a 2.16 kg load, the melt index of the adhesive film composition can be 8 g / 10 min to 60 g / 10 min, 8 g / 10 min to 40 g / 10 min, 8 g / 10 min to 25 g / 10 min, 12 g / 10 min to 60 g / 10 min, 12 g / 10 min to 40 g / 10 min, 12 g / 10 min to 25 g / 10 min, 16 g / 10 min to 60 g / 10 min, 16 g / 10 min to 40 g / 10 min, or even 16 g / 10 min to 25 g / 10 min, or any and all subranges formed by any of these endpoints.

[0093] In some embodiments, as measured according to ASTM D1238 at 190°C and a 2.16 kg load, the melt index of the adhesive film composition can be from 15 g / 10 min to 35 g / 10 min. In some embodiments, as measured according to ASTM D1238 at 190°C and a 2.16 kg load, the melt index of the adhesive film composition can be greater than or equal to 8 g / 10 min, greater than or equal to 10 g / 10 min, or even greater than or equal to 15 g / min. In some embodiments, as measured according to ASTM D1238 at 190°C and a 2.16 kg load, the melt index of the adhesive film composition can be less than or equal to 60 g / 10 min, less than or equal to 40 g / min, or even less than or equal to 25 g / min. In some embodiments, as measured according to ASTM D1238 at 190 °C and a 2.16 kg load, the melt index of the adhesive film composition may be 8 g / 10 min to 60 g / 10 min, 8 g / 10 min to 40 g / 10 min, 8 g / 10 min to 20 g / 10 min, 10 g / 10 min to 60 g / 10 min, 10 g / 10 min to 40 g / 10 min, 10 g / 10 min to 20 g / 10 min, 15 g / 10 min to 60 g / 10 min, 15 g / 10 min to 40 g / 10 min, or even 15 g / 10 min to 25 g / 10 min, or any and all subranges formed by any of these endpoints.

[0094] In some embodiments, the adhesive film composition may have surface tack, making it easy to handle manually.

[0095] As described herein, adhesive film compositions can be used to form any article requiring a thin adhesive seam film. Adhesive film compositions are particularly useful in the seamless construction of performance clothing, close-fitting garments, casual wear, and merchandise underwear.

[0096] Methods for forming adhesive seam film

[0097] Methods for forming an adhesive seam membrane may include: preparing an adhesive film composition and extruding the adhesive film composition to form a film with a thickness of 25 µm to 250 µm. The adhesive seam membrane may comprise an adhesive film composition according to one or more embodiments described herein.

[0098] For example, the prepared adhesive film composition or its components can be fed into an extruder and melt-mixed at a temperature greater than or equal to the melt temperature of the adhesive film composition. In some embodiments, the adhesive film composition can be melted and melt-mixed at a temperature of 150°C to 240°C for 10 seconds to 120 seconds. In some embodiments, the adhesive film composition can be melted and melt-mixed at temperatures of: 150°C to 240°C, 150°C to 230°C, 150°C to 220°C, 160°C to 240°C, 160°C to 230°C, 160°C to 220°C, 170°C to 240°C, 170°C to 230°C, or even 170°C to 220°C, or any and all subranges formed by any of these endpoints. In some embodiments, the adhesive film composition may be melted, melt-mixed for the following times: 10 to 120 seconds, 10 to 90 seconds, 10 to 60 seconds, 20 to 120 seconds, 20 to 90 seconds, 20 to 60 seconds, 30 to 120 seconds, 30 to 90 seconds, or even 30 to 60 seconds, or any and all subranges formed by any of these endpoints.

[0099] The adhesive film composition can be extruded from an extruder to form a film.

[0100] Adhesive seam membrane

[0101] See Figure 1 The adhesive seam film is shown as 50. The adhesive seam film 50 includes a length l, a width w, and a thickness t. The adhesive seam film may comprise an adhesive film composition according to one or more embodiments described herein.

[0102] As described herein, adhesive film compositions can be used to form thin adhesive seam films. In some embodiments, the adhesive seam film 50 may have an appropriate thickness to provide minimal volume and / or achieve enhanced performance in a seamless structure. For example, in some embodiments, the thickness t of the adhesive seam film 50 may be from 25 µm to 250 µm. In some embodiments, the thickness t of the adhesive seam film 50 may be greater than or equal to 25 µm, greater than or equal to 50 µm, or even greater than or equal to 100 µm. In some embodiments, the thickness t of the adhesive seam film 50 may be less than or equal to 250 µm, less than or equal to 200 µm, or even less than or equal to 150 µm. In some embodiments, the thickness t of the adhesive joint film 50 can be 25 µm to 250 µm, 25 µm to 200 µm, 25 µm to 150 µm, 50 µm to 250 µm, 50 µm to 200 µm, 50 µm to 150 µm, 100 µm to 250 µm, 100 µm to 200 µm, or even 100 µm to 150 µm, or any and all subranges formed by any of these endpoints. The thickness of the adhesive joint film 50 can be determined by measuring the thickness t of the adhesive joint film 50 using a thickness gauge.

[0103] In some embodiments, the width w can be selected to conform to the width of the manufacturing equipment used to conform to the width of the fabric to which the adhesive seam film will be applied, particularly if the adhesive seam film is extruded directly onto the fabric. In some embodiments, the width w can be further reduced post-manufacturing by cutting or slitting the film, particularly if the film is extruded onto a release liner. For example, in some embodiments, the width w of the adhesive seam film 50 can be from 5 cm to 40 cm. In some embodiments, the width w of the adhesive seam film 50 can be greater than or equal to 5 cm, greater than or equal to 10 cm, or even greater than or equal to 20 cm. In some embodiments, the width w of the adhesive seam film can be less than or equal to 40 cm, or even less than or equal to 30 cm. In some embodiments, the width w of the adhesive seam film can be 5 cm to 40 cm, 5 cm to 30 cm, 10 cm to 40 cm, 10 cm to 30 cm, 20 cm to 40 cm, 20 cm to 30 cm, or any and all subranges formed by any of these endpoints.

[0104] In some embodiments, the adhesive seam membrane 50 may be coated with polymer powder or a release agent to ensure ease of manual handling. Examples of suitable polymer powders and release agents may include powdered polyethylene and powdered polypropylene.

[0105] In some embodiments, the adhesive seam membrane may be part of a multilayer composite material comprising two or more layers of film. For example, see now. Figure 2 The multilayer composite material is shown as 100. The multilayer composite material 100 includes a first adhesive seam film 102, a second adhesive seam film 104, and a third adhesive seam film 106. The first adhesive seam film 102, the second adhesive seam film 104, and the third adhesive seam film 106 each have first surfaces 102a, 104a, and 106a and opposing second surfaces 102b, 104b, and 106b. The opposing second surface 102b of the first adhesive seam film 102 can be bonded to the first surface 104a of the second adhesive seam film 104. The opposing second surface 104b of the second adhesive seam film 104 can be bonded to the first surface 106a of the third adhesive seam film 106.

[0106] At least one membrane in a multilayer composite material can be an adhesive membrane composition as described herein. In some embodiments, all membranes in the multilayer composite material are adhesive seam membranes. In some embodiments, each membrane in the multilayer composite material has the same composition as the other membranes in the multilayer composite material. In some embodiments, each membrane in the multilayer composite material has a different composition than the other membranes in the multilayer composite material. In some embodiments, some membranes in the multilayer composite material have the same composition, while some membranes in the multilayer composition have different compositions.

[0107] In some embodiments, one or more films in a multilayer composite material can enhance specific properties of the multilayer composite material. For example, one or more layers of a multilayer composite material can reduce surface tackiness to improve the ease of handling the multilayer composite material. In some embodiments, an adhesive seam film can include one or more outer layers of the multilayer composite material. In some embodiments, an adhesive seam film can apply increased peel force to the multilayer composite material. In some embodiments, the thickness of the inner layer of the film can be greater than the thickness of the adhesive seam film. In some embodiments, the inner layer of the film can impart elasticity and elastic recovery to the multilayer composite material.

[0108] In some embodiments, the adhesive seam membrane may be part of a multilayer composite material comprising an adhesive seam membrane adhered to a fabric backing. See, for example, [link to relevant documentation]. Figure 3 A multilayer composite material with an adhesive seam film adhered to a fabric backing is shown in 200. (Example) Figure 2As shown and described, the multilayer composite material having an adhesive seam film adhered to the fabric backing 200 may include a first adhesive seam film 102, a second adhesive seam film 104, and a third adhesive seam film 106. The multilayer composite material 200 also includes a fabric backing 210. The opposite second surface 106b of the third adhesive seam film 106 may be bonded to a first surface 210a of the fabric backing 210. The fabric backing 210 may include nylon, polyester, acrylic, polyurethane, olefin, neoprene, acetate, elastic fibers, or combinations thereof.

[0109] In some embodiments, the adhesive seam membrane may be part of a multilayer composite material comprising an adhesive seam membrane adhered to a release liner. See, for example, [link to relevant documentation]. Figure 4 Multilayer composite materials, including adhesive seam film adhered to release liner, are shown in 300. (Example) Figure 2 As shown and described, the multilayer composite material having an adhesive seam film adhered to the release liner 300 may include a first adhesive seam film 102, a second adhesive seam film 104, and a third adhesive seam film 106. The multilayer composite material 300 also includes a release liner 330. A second, opposite surface 106b of the third adhesive seam film 106 may contact a first surface 330a of the release liner 330. In some embodiments, the release liner 330 may include paper. The paper may be coated with a release material. The release material may reduce the force required to remove the adhesive seam film from the release liner. The release material may include silicone.

[0110] In some embodiments, the release liner may be removable. In some embodiments, the multilayer composite material including an adhesive seam film adhered to the release liner may include the release liner on both surfaces of the multilayer composite material. In some embodiments, the multilayer composite material including an adhesive seam film adhered to the release liner may include the release liner on only one surface of the multilayer composite material. In some embodiments, the release liner may be removed before using the multilayer composite material.

[0111] In some embodiments, the adhesive seam film can be cut or slit to the desired width and then wound as a roll onto a release liner. This roll can then be fed into a coating machine, which applies the adhesive seam film to the fabric during garment construction. The coating machine applies the adhesive seam film to the fabric by unwinding the roll, bringing the adhesive seam film into contact with the garment, and removing and discarding the release liner.

[0112] Methods for forming adhesive webbing

[0113] Methods of forming adhesive webbing may include: preparing an adhesive webbing composition, and extruding the adhesive composition to form a webbing with a thickness of 25 µm to 30 µm. The adhesive webbing composition may include an adhesive composition according to one or more embodiments described herein.

[0114] For example, the prepared adhesive webbing composition or its components can be fed into an extruder and melt-mixed at the same or similar temperature and time as the method for forming an adhesive film described herein.

[0115] The adhesive webbing composition can be extruded from an extruder.

[0116] As the adhesive composition is extruded from the extruder, a die with multiple orifices at the end of the extruder can rotate, and the adhesive composition can travel as filaments through these orifices on the feed line. The rotation of the die with multiple orifices causes the filaments to overlap on top of each other and fuse together to form a webbing.

[0117] Adhesive webbing

[0118] See now Figure 5 The adhesive webbing is shown as 60. The adhesive webbing 60 includes a length l, a width w, and a thickness t. (As shown...) Figure 5 As shown, the adhesive webbing 60 includes filaments 62, which may contain an adhesive composition according to the embodiments described herein, and are fused together to form the adhesive webbing 60. The adhesive webbing 60 may contain an adhesive composition as described herein.

[0119] The adhesive webbing 60 may have the same or similar thickness t and / or width w as the adhesive film described herein.

[0120] In some implementations, adhesive webbing may be ideal for applications that require bonding a smaller fabric surface area to an adhesive structure or for applications that require cost savings.

[0121] In some embodiments, similar to the adhesive film described herein, the adhesive webbing 60 may be coated with polymer powder or a dusting agent to ensure ease of manual handling. Examples of polymer powder and dusting agent include powdered polyethylene and powdered polypropylene.

[0122] Methods for preparing seams

[0123] See now Figure 6The method for preparing a seam includes: providing a first fabric segment 440, a second fabric segment 460, and an adhesive seam film 410; placing the adhesive seam film 410 between the first fabric segment 440 and the second fabric segment 460 to form a seam segment 450; and heating the seam segment 450 to cause the adhesive seam film 410 to adhere to the first fabric segment 440 and the second fabric segment 460. Figure 6 As shown, the second fabric segment 460 at least partially overlaps with the first fabric segment 440. These steps can be performed sequentially. The adhesive seam film 410 may comprise an adhesive film composition according to one or more embodiments described herein.

[0124] Heating of the seam section 450 can be performed using a hot iron or hot air. The seam section 450 can be heated to a temperature greater than or equal to 100°C, greater than or equal to 110°C, or even greater than or equal to 120°C. In some embodiments, the seam section can be heated to a temperature less than or equal to 140°C, or even less than or equal to 130°C. In some embodiments, the seam section can be heated to temperatures of 100°C to 140°C, 100°C to 130°C, 110°C to 140°C, 110°C to 130°C, 120°C to 140°C, or even 120°C to 130°C, or any and all sub-ranges formed by any of these endpoints. In some embodiments, the seam section 450 can be heated to the softening temperature of the adhesive film composition.

[0125] In some embodiments, the joint section 450 can be compressed manually or by a compressor. The joint section 450 can be compressed at pressures greater than or equal to 5 kPa, greater than or equal to 15 kPa, or even greater than or equal to 30 kPa. In some embodiments, the joint section can be compressed at pressures less than or equal to 200 kPa, less than or equal to 100 kPa, or even less than or equal to 50 kPa. In some embodiments, the joint section 450 can be heated to temperatures of 5 kPa to 200 kPa, 5 kPa to 100 kPa, 5 kPa to 50 kPa, 15 kPa to 200 kPa, 15 kPa to 100 kPa, 15 kPa to 50 kPa, 30 kPa to 200 kPa, 30 kPa to 100 kPa, or even 30 kPa to 50 kPa, or any and all subranges formed by any of these endpoints.

[0126] seam

[0127] See you again Figure 6The seam is shown as 400. Seam 400 includes a first fabric segment 440, a second fabric segment 460, and an adhesive seam film 410. The first fabric segment 440, the second fabric segment 460, and the adhesive seam film 410 each have first surfaces 440a, 460a, and 410a, and opposing second surfaces 440b, 460b, and 410b. At least a portion of the opposing second surface 440b of the first fabric segment 440 can be bonded to the first surface 410a of the adhesive seam film 410. At least a portion of the first surface 460a of the second fabric segment 460 can be bonded to the opposing second surface 410b of the adhesive seam film 410. The adhesive seam film 410 is located within the seam segment 450. In some embodiments, the adhesive layer 410 may be located between the first fabric segment 440 and the second fabric segment 460.

[0128] See now Figure 7 Another seam is shown as 500, wherein the first fabric segment 540 and the second fabric segment 560 completely overlap. Seam 500 includes the first fabric segment 540, the second fabric segment 560, and an adhesive seam film 510. The first fabric segment 540, the second fabric segment 560, and the adhesive seam film 510 each have first surfaces 540a, 560a, and 510a, and opposing second surfaces 540b, 560b, and 510b. At least a portion of the opposing second surface 540b of the first fabric segment 540 can be bonded to the first surface 510a of the adhesive seam film 510. At least a portion of the first surface 560a of the second fabric segment 560 can be bonded to the opposing second surface 510b of the adhesive seam film 510. The adhesive seam film 510 is located within seam segment 550. In some embodiments, such as... Figure 7 As shown, the adhesive layer 510 may extend along the length of the first fabric segment and the second fabric segments 540, 560. In other embodiments, the adhesive layer 510 may extend along the entire length of the first fabric segment and the second fabric segments 540, 560.

[0129] In some embodiments, the seam section may include a seam thread that attaches the first fabric section to the second fabric section. See, for example, [link to relevant documentation]. Figure 8 The seam section 550 includes a seam thread 620. In some embodiments, the seam section is a seamless seam section, such as... Figure 6 and Figure 7 As shown.

[0130] The first and second fabric sections of the seam may each comprise nylon, polyester, acrylic, polyurethane, olefins, neoprene, acetate, elastic fibers, and combinations thereof. Examples of olefins include polypropylene, polyethylene, and combinations thereof. Examples of neoprene include polychloroprene rubber. Examples of elastic fibers include spandex. Examples of spandex include Lycra. ® It is available from Dow Chemical Company. In some embodiments, the first fabric segment and the second fabric segment may have the same composition. In some embodiments, the first fabric segment and the second fabric segment may have different compositions.

[0131] In some embodiments, a multilayer composite material including an adhesive seam membrane adhered to a fabric backing can be formed by a process in which the membrane is extruded directly onto the fabric and the adhesive seam membrane is bonded to the fabric to make the garment waterproof. For example, waterproof garments can be prepared by stitching or sewing with thread, and then covering the holes created by stitching or sewing with the adhesive seam membrane bonded to the holes and surrounding fabric.

[0132] Example

[0133] Non-limiting examples of various embodiments of the disclosed invention are provided.

[0134] Table 1 below shows the source of ingredients for the adhesive film compositions of comparative adhesive seam films C1 to C3 and example adhesive seam films E1 and E2.

[0135] Table 1

[0136]

[0137] The formulations of the adhesive seam films E1 and E2 of the examples and the comparative adhesive seam films C1-C3 were compounded in a twin-screw extruder at a temperature of 165°C to 205°C. Then, using a Brabender extruder, formulation particles of the adhesive seam films E1 and E2 of the examples and the comparative adhesive seam films C1-C3 were produced at a temperature of 165°C to 200°C, wherein the die head was attached to the end of the Brabender extruder.

[0138] The adhesive seam films E1 and E2 of the examples and the adhesive seam films C1-C3 of the comparative examples are located between two layers of fabric and are compressed for 15 seconds using a compressor at 160°C and 35 kPa.

[0139] For the measurements, cross-sections of the adhesive seam films E1 and E2 of the examples and the adhesive seam films C1-C3 of the comparative examples were sampled to normalize the differences in the resulting film thicknesses.

[0140] Table 2 below shows the formulations and certain properties of the adhesive seam films E1 and E2 of the examples and the adhesive seam films C1-C3 of the comparative examples.

[0141] Table 2

[0142]

[0143] As shown in Table 2, the adhesive film compositions disclosed herein can be used to form adhesive seam films having the desired adhesion or bond strength, elasticity and / or elastic recovery.

[0144] As further shown in Table 2, the adhesive film compositions disclosed herein can be used to form thin adhesive seam films. While not limited to theory, it is believed that the adhesive film compositions used to form the adhesive seam films E1 and E2 of the examples have a suitable balance in the properties of the adhesive film composition and the amount and properties of the components in the adhesive film composition to achieve a thin adhesive seam film. Furthermore, while not limited to theory, although the comparative adhesive seam film C1 may already have a suitable balance of properties and amounts to achieve a thin adhesive seam film, the comparative adhesive seam film C1 may not achieve the required adhesion or adhesive strength, elasticity, and / or elastic recovery in certain applications.

[0145] Unless otherwise stated, all references cited herein are incorporated herein in their entirety. The citation of any reference is not construed as an admission of prior art to any invention disclosed or claimed herein. Where any meaning or definition of a term herein conflicts with any meaning or definition of the same term in any referenced document, the meaning or definition given to that term herein shall prevail.

[0146] It will be clear that various alterations and modifications may be made without departing from the scope of the disclosure as defined by the appended claims. More specifically, while some aspects of this disclosure are regarded herein as preferred or particularly advantageous, it is conceivable that this disclosure is not necessarily limited to these aspects.

Claims

1. An adhesive seam film comprising an adhesive film composition, wherein, based on the total weight of the adhesive film composition, the adhesive film composition comprises: 21% to 85% by weight of styrene-ethylene / butene-styrene triblock copolymer, wherein, Based on the total weight of the styrene-ethylene / butene-styrene triblock copolymer, the weight-average molecular weight of the styrene-ethylene / butene-styrene triblock copolymer ranges from 90,000 g / mol to 140,000 g / mol, and the bound styrene content ranges from 28% to 35% by weight. 15% to 35.5% by weight of white mineral oil; and From 0% to 40% by weight of a tackifier, wherein the tackifier has a weight-average molecular weight of 500 g / mol to 5000 g / mol, a glass transition temperature of 50°C to 100°C, and a softening temperature of 100°C to 140°C. The thickness of the adhesive seam film is 25µm to 250µm.

2. The adhesive seam film as claimed in any of the preceding claims, wherein, The adhesive film composition comprises 21% to 55% by weight of a styrene-ethylene / butene-styrene triblock copolymer and 27% to 35.5% by weight of a white mineral oil.

3. The adhesive seam film as claimed in any of the preceding claims, wherein, The adhesive film composition contains 5% to 30% by weight of tackifier.

4. The adhesive seam film as claimed in any of the preceding claims, wherein, The tackifier is a mid-block associative tackifier.

5. The adhesive seam film as claimed in any of the preceding claims, wherein, The width of the adhesive seam membrane ranges from 5cm to 40cm.

6. The adhesive seam film as claimed in any of the preceding claims, wherein, According to ASTM D1238, the melt index of the adhesive film composition is 15 g / 10 min to 60 g / 10 min, measured at 190 °C and 2.16 kg load.

7. The adhesive seam film as claimed in any of the preceding claims, wherein, The polydispersity of the styrene-ethylene / butene-styrene triblock copolymer is 1.0 to 1.

3.

8. The adhesive seam film as claimed in any of the preceding claims, wherein, Adhesive seam membranes are part of a multilayer composite material comprising two or more membranes.

9. The adhesive seam film as claimed in any of the preceding claims, wherein, Adhesive seam film is part of a multilayer composite material that includes adhesive seam film adhered to a fabric backing.

10. The adhesive seam membrane according to any one of claims 1-6, wherein, The adhesive seam membrane is part of a multilayer composite material, which includes an adhesive seam membrane adhered to a release liner.

11. The adhesive seam film as claimed in any of the preceding claims, wherein, The adhesive seam membrane is coated with polymer powder or a release agent.

12. The adhesive seam film as claimed in any of the preceding claims, wherein, According to measurements using a two-cycle 200% tensile test, the adhesive seam film has a hysteresis percentage of less than 5%.

13. The adhesive seam film as claimed in any of the preceding claims, wherein, According to measurements using a two-cycle 200% tensile test, the adhesive seam film has a hysteresis percentage of less than 3%.

14. The adhesive seam film as claimed in any of the preceding claims, wherein, The adhesive film composition also includes maleic anhydride-grafted styrene-ethylene / butene-styrene triblock copolymer.

15. A seam comprising: First fabric section; The second fabric section at least partially overlaps with the first fabric section to form a seam section; and An adhesive seam film located in any of the preceding claims in the seam section, which causes the first fabric section to adhere to the second fabric section.

16. The joint as claimed in claim 15, wherein, An adhesive seam membrane is placed between the first fabric section and the second fabric section.

17. The joint as claimed in claim 15 or claim 16, wherein, The seam section includes the seam thread that attaches the first fabric section to the second fabric section.

18. The joint as claimed in claim 15 or claim 16, wherein, The seam section is a seamless seam section.

19. The joint as claimed in any one of claims 15 to 18, wherein, The first fabric segment and the second fabric segment each comprise: nylon, polyester, acrylic, polyurethane, olefin, neoprene, acetate, elastic fiber, or a combination thereof.

20. A method of forming an adhesive seam film, the method comprising: Preparation of adhesive film compositions; and Extruding adhesive film compositions to form adhesive seam films with a thickness of 25µm to 250µm; The adhesive film composition comprises: Based on the total weight of the membrane composition, 21% to 85% by weight of a styrene-ethylene / butene-styrene triblock copolymer, wherein, based on the total weight of the styrene-ethylene / butene-styrene triblock copolymer, the weight-average molecular weight of the styrene-ethylene / butene-styrene triblock copolymer is 90,000 g / mol to 140,000 g / mol, and the bound styrene content is 28% to 35% by weight. 15% to 35.5% by weight of white mineral oil; and From 0% to 40% by weight of a tackifier, wherein the tackifier has a weight-average molecular weight of 500 g / mol to 5000 g / mol, a glass transition temperature of 50°C to 100°C, and a softening temperature of 100°C to 140°C.

21. The method of claim 20, wherein, The adhesive film composition contains 5% to 30% by weight of tackifier.

22. A method for preparing a seam, the method comprising: Provides a first fabric section, a second fabric section, and an adhesive seam membrane; An adhesive seam film is placed between a first fabric segment and a second fabric segment to form a seam segment, wherein the second fabric segment at least partially overlaps the first fabric segment; and The seam section is heated so that the adhesive seam film adheres to the first fabric section and the second fabric section. The adhesive seam film comprises an adhesive film composition, which, based on the total weight of the adhesive film composition, comprises: The styrene-ethylene / butene-styrene triblock copolymer comprises 21% to 85% by weight, wherein, based on the total weight of the styrene-ethylene / butene-styrene triblock copolymer, the weight-average molecular weight of the styrene-ethylene / butene-styrene triblock copolymer is 90,000 g / mol to 140,000 g / mol, and the bound styrene content is 28% to 35% by weight. 15% to 35.5% by weight of white mineral oil; and From 0% to 40% by weight of a tackifier, wherein the tackifier has a weight-average molecular weight of 500 g / mol to 5000 g / mol, a glass transition temperature of 50°C to 100°C, and a softening temperature of 100°C to 140°C; and The thickness of the adhesive seam film is 25µm to 250µm.

23. The method of claim 22, wherein, The adhesive film composition contains 5% to 30% by weight of tackifier.

24. The method of claim 22 or claim 23, wherein, The heating process for the joint section is carried out using hot iron or hot air.

25. An adhesive webbing comprising an adhesive film composition, wherein, based on the total weight of the adhesive film composition, the adhesive film composition comprises: 21% to 85% by weight of styrene-ethylene / butene-styrene triblock copolymer, wherein, Based on the total weight of the styrene-ethylene / butene-styrene triblock copolymer, the weight-average molecular weight of the styrene-ethylene / butene-styrene triblock copolymer ranges from 90,000 g / mol to 140,000 g / mol, and the bound styrene content ranges from 28% to 35% by weight. 15% to 35.5% by weight of white mineral oil; and From 0% to 40% by weight of a tackifier, wherein the tackifier has a weight-average molecular weight of 500 g / mol to 5000 g / mol, a glass transition temperature of 50°C to 100°C, and a softening temperature of 100°C to 140°C.

26. The adhesive webbing as claimed in claim 25, wherein, The thickness of the adhesive webbing ranges from 25 μm to 250 μm.

27. A seam comprising: First fabric section; The second fabric section at least partially overlaps with the first fabric section to form a seam section; and The adhesive seam webbing of claim 22, located in the seam section, adheres the first fabric section to the second fabric section.

28. The joint as claimed in claim 27, wherein, The adhesive webbing is positioned between the first fabric segment and the second fabric segment.

29. The joint as claimed in claim 27 or claim 28, wherein, The seam section includes the seam thread that attaches the first fabric section to the second fabric section.

30. The joint as claimed in claim 27 or claim 29, wherein, The seam section is a seamless seam section.

31. The joint as claimed in any one of claims 27 to 30, wherein, The first fabric segment and the second fabric segment each comprise: nylon, polyester, acrylic, polyurethane, olefin, neoprene, acetate, elastic fiber, or a combination thereof.

32. A method for preparing a seam, the method comprising: Provides a first fabric segment, a second fabric segment, and an adhesive webbing; An adhesive webbing is placed between a first fabric segment and a second fabric segment to form a seam segment, wherein the second fabric segment at least partially overlaps the first fabric segment; and The seam section is heated so that the adhesive webbing adheres to the first and second fabric sections. The adhesive webbing comprises an adhesive film composition, which, based on the total weight of the adhesive film composition, comprises: The styrene-ethylene / butene-styrene triblock copolymer comprises 21% to 45.5% by weight, wherein, based on the total weight of the styrene-ethylene / butene-styrene triblock copolymer, the weight-average molecular weight of the styrene-ethylene / butene-styrene triblock copolymer is 90,000 g / mol to 140,000 g / mol, and the bound styrene content is 28% to 35% by weight. 27% to 35.5% by weight of white mineral oil; and From 0% to 40% by weight of a tackifier, wherein the tackifier has a weight-average molecular weight of 500 g / mol to 5000 g / mol, a glass transition temperature of 50°C to 100°C, and a softening temperature of 100°C to 140°C.

33. The method of claim 32, wherein, The thickness of the adhesive webbing ranges from 25 μm to 250 μm.

34. The method of claim 32 or claim 33, wherein, The adhesive film composition contains 5% to 30% by weight of tackifier.

35. The method according to any one of claims 32 to 34, wherein, The heating process for the joint section is carried out using hot iron or hot air.

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