An ultra-soft high-elastic hot melt film with skin-friendly

Abstract

The application discloses a kind of super-soft high-elasticity hot melt films with skin-friendly, it relates to hot melt film technical field, the super-soft high-elasticity hot melt film with skin-friendly, raw material is by weight percentage, including as follows component: SBC class (SEBS, SEPS, SIS, SBS) elastomer: 45%-75%;TPU: 20%-35%;Compatibility agent (maleic anhydride grafting SIS / SBS class): 2%-10%;Paraffin oil or naphthenic oil: 2%-5%;Tackifying resin (carbon 5 or carbon 9): 1%-5%;Antioxidant: 0-0.5%;Ultraviolet absorber 0-0.5%, solve the current market commonly used female sports underwear hot melt film elastic band rebound is not good, not soft enough and without skin feeling, skin quality, Q feeling problem.The hot melt film of the application has high tensile rebound elasticity, super-soft, strong skin feeling, good Q elasticity;The hot melt film of the application is used for the lamination of sports underwear fabric, has good bonding strength, washability, service lamination, the application has high tensile rebound elasticity, so that underwear hot melt film has good tensile rebound performance.

Description

Technical Field

[0001] This invention relates to the field of hot melt film technology, specifically to a skin-friendly, ultra-soft, and highly elastic hot melt film. Background Technology

[0002] As people's living standards improve, they are paying more and more attention to health and body shape. Exercise is the healthiest and most effective way to achieve this, and sports bras have become an essential item for women's health and exercise. Their demand will increase as people's living standards improve.

[0003] Currently, the elasticity of the hot-melt film used in women's sports bras on the market is poor. Hot-melt film is a common material for elastic bands in bras; it is processed by high-temperature heat melting to bond the two sides of the elastic band together. However, some bra brands do not consider the importance of elasticity when choosing hot-melt film materials, causing the elastic band to loosen after a period of use, losing its good support and failing to effectively support the breasts. In addition, these hot-melt film materials also suffer from poor softness. Softness refers to the softness and feel of the material, which has a significant impact on the comfort and texture of the bra. However, some common hot-melt film materials on the market are hard and have a rough feel, significantly reducing the fit and comfort of the bra. Furthermore, these materials lack a skin-friendly, skin-friendly, and bouncy feel. Skin-friendly and skin-friendly refer to the feel and comfort of the bra material when in contact with the skin, while bouncy feel indicates the quality and elasticity of the bra. However, some hot-melt film materials have poor smoothness and texture, failing to provide a soft and skin-friendly feel, and lacking high quality and elasticity.

[0004] This invention proposes a skin-friendly, ultra-soft, highly elastic hot melt film to solve the above problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a skin-friendly, ultra-soft, and highly elastic hot melt film, which solves the problems of poor elasticity, insufficient softness, and lack of skin-friendliness, texture, and bouncy feel in the elastic bands of commonly used hot melt films for women's sports bras on the market.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a skin-friendly, ultra-soft, highly elastic hot melt film, the raw materials of which, by weight percentage, comprise the following components: SBC-type (SEBS, SEPS, SIS, SBS) elastomer: 45%-75%; TPU: 20%-35%; compatibilizer (maleic anhydride-grafted SIS / SBS ​​type): 2%-10%; paraffin oil or naphthenic oil: 2%-5%; tackifying resin (C5 or C9): 1%-5%; antioxidant: 0-0.5%; ultraviolet absorber: 0-0.5%.

[0007] Furthermore, its raw materials, by weight percentage, include the following components: SBC-type (SEBS, SEPS, SIS, SBS) elastomer: 45%; TPU: 35%; compatibilizer (maleic anhydride-grafted SIS / SBS ​​type): 9%; paraffin oil or naphthenic oil: 5%; tackifying resin (C5 or C9): 5%; antioxidant: 0.5%; ultraviolet absorber: 0.5%.

[0008] Furthermore, its raw materials, by weight percentage, include the following components: SBC-type (SEBS, SEPS, SIS, SBS) elastomer: 65%; TPU: 25%; compatibilizer (maleic anhydride-grafted SIS / SBS ​​type): 3.7%; paraffin oil or naphthenic oil: 4%; tackifying resin (C5 or C9): 2%; antioxidant: 0.2%; ultraviolet absorber: 0.1%.

[0009] Furthermore, its raw materials, by weight percentage, include the following components: SBC-type (SEBS, SEPS, SIS, SBS) elastomer: 70.8%; TPU: 21%; compatibilizer (maleic anhydride-grafted SIS / SBS ​​type): 3%; paraffin oil or naphthenic oil: 3.5%; tackifying resin (C5 or C9): 1.5%; antioxidant: 0.15%; ultraviolet absorber: 0.05%.

[0010] Furthermore, its raw materials, by weight percentage, include the following components: SBC-type (SEBS, SEPS, SIS, SBS) elastomer: 74.9%; TPU: 20%; compatibilizer (maleic anhydride-grafted SIS / SBS ​​type): 2%; paraffin oil or naphthenic oil: 2%; tackifying resin (C5 or C9): 1%; antioxidant: 0.08%; ultraviolet absorber: 0.02%.

[0011] This invention also provides a manufacturing process for a skin-friendly, ultra-soft, highly elastic hot melt film, used to process a skin-friendly, ultra-soft, highly elastic hot melt film. The process specifically includes the following steps:

[0012] Step 1: Mix SBC type (SEBS, SEPS, SIS, SBS) elastomer, paraffin oil or naphthenic oil, tackifying resin, compatibilizer, antioxidant, and ultraviolet absorber in a certain proportion in a high-speed mixer, and then melt, plasticize, and granulate the mixture through a twin-screw extruder to obtain particles.

[0013] Step 2: After the particles obtained in Step 1 are blended with TPU in a high-speed mixer, they are then melted, plasticized, extruded and granulated by a twin-screw extruder to obtain blended granules.

[0014] Step 3: The blended granules obtained in Step 2 are melted, extruded, and coated onto glassine paper using a single-screw extruder to obtain a hot melt adhesive film.

[0015] Furthermore, in step one, the high-speed mixer has a mixing time of 15-40 minutes and a rotation speed of 60 rad / s, and the twin-screw extruder has an extrusion temperature of 180-220℃.

[0016] Furthermore, in step two, the extrusion temperature of the twin-screw extruder is 160-190℃, and in step three, the extrusion temperature of the single-screw extruder is 160-190℃ and the die temperature is 150-170℃.

[0017] Furthermore, in step three, the thickness of the hot melt adhesive film coating is 0.05-0.40 mm.

[0018] Beneficial effects

[0019] This invention provides a skin-friendly, ultra-soft, and highly elastic hot melt film. Compared with existing technologies, it has the following advantages:

[0020] 1. A skin-friendly, ultra-soft, and highly elastic hot melt film, comprising the following components by weight percentage: SBC-type (SEBS, SEPS, SIS, SBS) elastomer: 45%-75%; TPU: 20%-35%; compatibilizer (maleic anhydride-grafted SIS / SBS ​​type): 2%-10%; paraffin oil or naphthenic oil: 2%-5%; tackifying resin (C5 or C9): 1%-5%; antioxidant: 0-0.5%; ultraviolet absorber: 0-0.5%. This invention solves the problems of poor elasticity, insufficient softness, and lack of skin-friendliness, texture, and Q-feel found in commonly used hot melt films for women's sports bras on the market.

[0021] 2. A skin-friendly, ultra-soft, highly elastic hot melt film. The hot melt film of this invention possesses high tensile resilience, ultra-softness, a strong skin-friendly feel, and good elasticity. Used for bonding sports bra fabrics, this hot melt film exhibits good adhesive strength, washability, and conformability. The high tensile resilience of the hot melt film gives it excellent tensile resilience performance. This means that the hot melt film material can quickly return to its original shape after stretching, maintaining the close fit and support of the bra, effectively preventing sagging and deformation, and providing lasting comfort and good support. The ultra-softness of the hot melt film makes it extremely soft and skin-friendly. This softness better adapts to the curves of the breast and increases the comfort of wearing the bra.

[0022] 3. A skin-friendly, ultra-soft, highly elastic hot melt film. The hot melt film for underwear of this invention has excellent skin-friendliness, meaning it feels very comfortable against the skin, providing a considerate experience. The hot melt film of this invention also features good Q-elasticity. Q-elasticity indicates that the material has excellent resilience, quickly returning to its original shape while maintaining a certain degree of elasticity. This characteristic allows the underwear to better conform to the body's curves, increasing comfort and freedom of movement during exercise. The hot melt film of this invention is also suitable for bonding with sports underwear fabrics, and has good adhesive strength, washability, and conformability. High adhesive strength ensures the structural stability and durability of the underwear. Washability means that the quality of the hot melt film can withstand multiple washes without deformation or peeling. Conformity means that the hot melt film can adhere tightly to the fabric when in contact with it, without bubbling, wrinkling, or peeling, ensuring the overall quality and lifespan of the underwear. Attached Figure Description

[0023] Figure 1 This is a process flow diagram of the present invention. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] like Figure 1 This invention provides four technical solutions: a skin-friendly, ultra-soft, highly elastic hot melt film, specifically including the following embodiments:

[0026] Example 1: Step 1: Mix 45% of SBC-type (SEBS, SEPS, SIS, SBS) elastomer, 5% of paraffin oil or naphthenic oil, 5% of tackifying resin, 9% of compatibilizer, 0.5% of antioxidant, and 0.5% of UV absorber in a certain proportion in a high-speed mixer, and then melt, plasticize, and granulate the mixture through a twin-screw extruder to obtain particles used to lower the melting point of SBC elastomer and increase the uniformity of the material.

[0027] Step 2: After the particles obtained in Step 1 are blended with 35% TPU in a high-speed mixer, the mixture is then melted, plasticized, extruded, and granulated by a twin-screw extruder to obtain blended granules, which are used to increase the uniformity of the material.

[0028] Step 3: The blended granules obtained in Step 2 are melted, extruded, and coated onto glassine paper using a single-screw extruder to obtain a hot melt adhesive film.

[0029] Example 2: Step 1: Mix 65% of SBC-type (SEBS, SEPS, SIS, SBS) elastomer, 4% of paraffin oil or naphthenic oil, 2% of tackifying resin, 3.7% of compatibilizer, 0.2% of antioxidant, and 0.1% of UV absorber in a certain proportion in a high-speed mixer, and then melt, plasticize, and granulate the mixture through a twin-screw extruder to obtain particles used to lower the melting point of SBC elastomer and increase the uniformity of the material.

[0030] Step 2: After the particles obtained in Step 1 are blended with 25% TPU in a high-speed mixer, the mixture is then melted, plasticized, extruded, and granulated by a twin-screw extruder to obtain blended granules, which are used to increase the uniformity of the material.

[0031] Step 3: The blended granules obtained in Step 2 are melted, extruded, and coated onto glassine paper using a single-screw extruder to obtain a hot melt adhesive film.

[0032] Example 3: Step 1: Mix 70.8% of SBC-type (SEBS, SEPS, SIS, SBS) elastomer, 3.5% of paraffin oil or naphthenic oil, 1.5% of tackifying resin, 3% of compatibilizer, 1.5% of antioxidant, and 0.05% of UV absorber in a certain proportion in a high-speed mixer, and then melt, plasticize, and granulate the mixture through a twin-screw extruder to obtain particles used to lower the melting point of SBC elastomer and increase the uniformity of the material.

[0033] Step 2: After the particles obtained in Step 1 are blended with 21% TPU in a high-speed mixer, the mixture is then melted, plasticized, extruded, and granulated by a twin-screw extruder to obtain blended granules, which are used to increase the uniformity of the material.

[0034] Step 3: The blended granules obtained in Step 2 are melted, extruded, and coated onto glassine paper using a single-screw extruder to obtain a hot melt adhesive film.

[0035] Example 4: Step 1: Mix 74.9% of SBC-type (SEBS, SEPS, SIS, SBS) elastomer, 2% of paraffin oil or naphthenic oil, 1% of tackifying resin, 2% of compatibilizer, 0.08% of antioxidant, and 0.02% of UV absorber in a certain proportion in a high-speed mixer, and then melt, plasticize, and granulate the mixture through a twin-screw extruder to obtain particles used to lower the melting point of SBC elastomer and increase the uniformity of the material.

[0036] Step 2: After blending the particles obtained in Step 1 with 20% TPU in a high-speed mixer, the mixture is then melted, plasticized, extruded, and granulated using a twin-screw extruder to obtain blended granules, which are used to increase the uniformity of the material.

[0037] Step 3: The blended granules obtained in Step 2 are melted, extruded, and coated onto glassine paper using a single-screw extruder to obtain a hot melt adhesive film.

[0038] In this embodiment of the invention, in step one, the high-speed mixer has a mixing time of 15-40 minutes and a rotation speed of 60 rad / s, and the twin-screw extruder has an extrusion temperature of 180-220℃.

[0039] In this embodiment of the invention, in step two, the extrusion temperature of the twin-screw extruder is 160-190℃, and in step three, the extrusion temperature of the single-screw extruder is 160-190℃ and the die temperature is 150-170℃.

[0040] In this embodiment of the invention, in step three, the thickness of the hot melt adhesive film coating is 0.05-0.40 mm.

[0041] In this invention, the material is calculated based on 100 kg, and hot melt adhesive film is produced using the processing method of Example 2. The performance of the hot melt film is then tested. The specific operating steps are as follows:

[0042] 1) Mix 65 kg of SEBS (Baling Petrochemical 503T) elastomer, 4 kg of paraffin oil, 2 kg of tackifying resin, 3.7 kg of maleic anhydride graft compatibilizer (Keteng 1901), 0.2 kg of antioxidant, and 0.1 kg of UV absorber in a high-speed mixer for 15-40 minutes, and then melt, plasticize, and granulate the mixture through a twin-screw extruder at 180-220℃.

[0043] 2) The particles obtained in step 1) are blended with 25 kg of TPU (model 96F80, Lubrizol), and then melted, plasticized, extruded and granulated in a twin-screw extruder at 160-190℃ to obtain blended particles.

[0044] 3) The particles obtained in step 2) are melted, extruded and coated with a 0.05-0.40 mm thick coating onto glassine paper through a single screw extruder (extrusion temperature 160-190℃, die temperature 150-170℃) to obtain a highly elastic hot melt adhesive film.

[0045] The prepared hot melt film was pressed onto an elastic sportswear fabric using a 160℃ press for 20 seconds, and its performance was tested. The results are shown in the table below.

[0046]

[0047] Performance Test Results Table for Sports Apparel Fabrics

[0048] The performance of the hot melt adhesive films prepared in Examples 1, 3, and 4 was tested according to the above method. The overall performance of the films was worse than that of Example 2 in terms of the feel of the film, the hardness of the film, the 300% elongation recovery of the film, the peel strength (before washing), the peel strength (after washing for 20 hours), the feel of the film after bonding with the fabric, the 300% elongation recovery of the film after bonding with the fabric, the 300% stretch appearance after bonding with the fabric, and the crease elasticity after bonding with the fabric. Therefore, the hot melt adhesive film prepared in Example 2 is the best solution in this invention.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0050] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A skin-friendly, ultra-soft, highly elastic hot melt film, characterized in that: The raw materials, by weight percentage, consist of the following components: SBC elastomer: 45% - 75%, wherein the SBC elastomer is selected from one or more of SEBS, SEPS, SIS, or SBS; TPU: 20% - 35%; Compatibilizer: 2%-10%; Paraffin oil or naphthenic oil: 2%-5%; C5 or C9 tackifying resin: 1%-5%; Antioxidant: 0-0.5%; UV absorber: 0-0.5%.

2. The skin-friendly, ultra-soft, highly elastic hot melt film according to claim 1, characterized in that: The raw materials, by weight percentage, are as follows: SBC elastomer: 45%, wherein the SBC elastomer is selected from one or more of SEBS, SEPS, SIS, or SBS; TPU: 35%; compatibilizer: 9%; paraffin oil or naphthenic oil: 5%; C5 or C9 tackifying resin: 5%; antioxidant: 0.5%; ultraviolet absorber: 0.5%.

3. The skin-friendly, ultra-soft, highly elastic hot melt film according to claim 1, characterized in that: The raw materials, by weight percentage, are as follows: SBC elastomer: 65%, wherein the SBC elastomer is selected from one or more of SEBS, SEPS, SIS, or SBS; TPU: 25%; compatibilizer: 3.7%; paraffin oil or naphthenic oil: 4%; C5 or C9 tackifying resin: 2%; antioxidant: 0.2%; ultraviolet absorber: 0.1%.

4. The skin-friendly, ultra-soft, highly elastic hot melt film according to claim 1, characterized in that: The raw materials, by weight percentage, consist of the following components: SBC elastomer: 70.8%, wherein the SBC elastomer is selected from one or more of SEBS, SEPS, SIS, or SBS; TPU: 21%; Compatibilizer: 3%; Paraffin oil or naphthenic oil: 3.5%; C5 or C9 tackifying resin: 1.5%; Antioxidant: 0.15%; UV absorber: 0.05%.

5. The skin-friendly, ultra-soft, highly elastic hot melt film according to claim 1, characterized in that: The raw materials, by weight percentage, are as follows: SBC elastomer: 74.9%, wherein the SBC elastomer is selected from one or more of SEBS, SEPS, SIS, or SBS; TPU: 20%; compatibilizer: 2%; paraffin oil or naphthenic oil: 2%; C5 or C9 tackifying resin: 1%; antioxidant: 0.08%; ultraviolet absorber: 0.02%.

6. A production process for a skin-friendly, ultra-soft, highly elastic hot melt film, characterized in that: For processing the skin-friendly, ultra-soft, highly elastic hot melt film as described in any one of claims 1-5, the process specifically includes the following steps: Step 1: Mix SBC type elastomer (selected from one or more of SEBS, SEPS, SIS, or SBS), paraffin oil or naphthenic oil, tackifying resin, compatibilizer, antioxidant, and ultraviolet absorber in a certain proportion in a high-speed mixer, and then melt, plasticize, and granulate the mixture through a twin-screw extruder to obtain particles. Step 2: After the particles obtained in Step 1 are blended with TPU in a high-speed mixer, they are then melted, plasticized, extruded and granulated by a twin-screw extruder to obtain blended granules. Step 3: The blended granules obtained in Step 2 are melted, extruded, and coated onto glassine paper using a single-screw extruder to obtain a hot melt adhesive film.

7. The production process of a skin-friendly, ultra-soft, highly elastic hot melt film according to claim 6, characterized in that: In step one, the high-speed mixer mixes for 15-40 minutes at a speed of 60 rad / s, and the twin-screw extruder extrusion temperature is 180-220℃.

8. The production process of a skin-friendly, ultra-soft, highly elastic hot melt film according to claim 6, characterized in that: In step two, the extrusion temperature of the twin-screw extruder is 160-190℃. In step three, the extrusion temperature of the single-screw extruder is 160-190℃ and the die temperature is 150-170℃.

9. The production process of a skin-friendly, ultra-soft, highly elastic hot melt film according to claim 6, characterized in that: In step three, the thickness of the hot melt adhesive film coating is 0.05-0.40 mm.

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