Alginate fiber cotton sliver and preparation method thereof

Abstract

The invention provides an alginate fiber cotton sliver and a preparation method thereof, and belongs to the technical field of nursing materials. Through deep integration of material innovation and structural design, the inherent problems of a traditional tampon in the aspects of biological safety, leakage prevention reliability, use comfort, material environmental protection and the like are systematically solved, and the unification of efficient protection, health and safety, extreme comfort and environmental friendliness is successfully achieved; a brand-new high-end tampon solution with an active health care function is provided for the market. According to the invention, the renewable alginate fiber and cotton fiber from the ocean are adopted as the main body material, the material source is sustainable and biodegradable, and the dependence on non-renewable petroleum-based raw materials is greatly reduced. In the whole product, chlorine bleaching and use of a chemical bacteriostatic agent are avoided from the material to the processing process, the environmental load is reduced, the urgent demand of modern consumers for green, low-carbon and recyclable consumer goods is met, and the reliability and expandability of large-scale industrial production are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of nursing supplies, and particularly relates to a seaweed fiber tampon and a preparation method thereof. BACKGROUND

[0002] A sanitary tampon is a period hygiene product used inside the vagina, whose main function is to directly absorb menstrual blood to maintain the cleanliness and dryness of the external environment. Traditional sanitary tampons are usually composed of an absorbent core and a traction string, wherein the absorbent core is mostly compressed and formed from cotton fibers, rayon or their mixture, and the outer layer is often wrapped with a leakage-proof net or non-woven fabric made of chemical materials.

[0003] Although its original design aims to provide built-in protection, traditional sanitary tampons still have significant technical bottlenecks and user pain points in terms of product performance and safety. The primary problem focuses on biological safety. The vaginal environment is sensitive and has a complex bacterial flora, and the retention of menstrual blood can easily lead to bacterial growth, increasing the risk of toxic shock syndrome (TSS). To address this problem, some products on the market choose to add chlorine bleach or chemically synthesized antibacterial agents, but these exogenous additives themselves can disrupt the normal microecological balance in the vagina, causing irritation or allergic reactions, and their long-term biological safety is also controversial.

[0004] Secondly, there is a contradiction between absorption performance and use experience. In order to pursue high absorption capacity, traditional products often rely on thick or high-density compression of materials, but this can easily cause a strong dry and rough feeling when inserted, causing discomfort; after absorbing menstrual blood, its swollen shape is uncontrollable, which may not be evenly fitted to the folds of the vaginal wall, thereby causing side leakage hazards, or causing bloating pain due to excessive local pressure. Functional simplicity is also an inherent defect. Traditional products focus on physical absorption, which is a passive protection strategy, lacking the function of actively maintaining the health of the vaginal environment. The material itself has no any beneficial physiological environment characteristics and cannot effectively intervene in the inevitable bacterial proliferation during use while absorbing menstrual blood. In terms of material sustainability and environmental protection, traditional tampons mainly rely on cotton planting (which may involve large consumption of pesticides and water resources) or chemically prepared rayon, and the environmental footprint of the raw material source and production process is being scrutinized by more and more consumers.

[0005] Although the industry recognizes these limitations, improvement attempts often encounter resistance. For example, the introduction of natural fibers often faces problems such as poor processing adaptability, insufficient fiber strength or unstable performance; and if natural extracts are added as antibacterial ingredients, they are easily inactivated in the high-temperature and high-pressure processing process, making it difficult to ensure the uniformity and effectiveness of the final product function. Therefore, the market urgently needs a new sanitary tampon solution that innovates from the material source and combines a special structure, which can internally have excellent absorption performance, active biological safety protection, excellent use comfort, and is suitable for large-scale stable production. SUMMARY

[0006] The present application aims to provide a seaweed fiber tampon and a preparation method thereof, which achieves excellent effects by combining specific materials and structures.

[0007] To achieve the above-mentioned application purposes, the present application provides the following technical solutions: The present application provides a sanitary tampon, comprising an absorbent core and a pull rope connected to one end of the absorbent core; the absorbent core is a multi-layer structure, which is arranged in layers around a central axis from the outside to the inside, and comprises, in sequence from the outside to the inside, a seaweed fiber non-woven fabric surface layer as an outer covering layer and a core material as a core absorbent layer; The core material is composed of seaweed fiber non-woven fabric; The outer covering layer is at least one layer of seaweed fiber non-woven fabric wrapped on the outer surface of the core material; The non-woven fabric is made of seaweed fiber and cotton fiber mixed in a mass ratio of 0.1-100:1; The absorbent core is formed into a cylindrical structure by pressing two pieces of double-layer composite sheet-shaped base materials arranged in a cross shape with the central axis as the intersection point and overlapping each other; the double-layer composite sheet-shaped base material is formed by wrapping the core material with the outer covering layer and fixing it on the edge by hot melting.

[0008] Preferably, the gram weight of the seaweed fiber non-woven fabric of the outer covering layer is 10-100 g / m 2 .

[0009] Preferably, the outer covering layer of seaweed fiber non-woven fabric is provided with air permeable holes; The diameter of the air permeable holes is 0.4-0.9 mm, and the hole density is 25-45 per cm 2 .

[0010] Preferably, the gram weight of the seaweed fiber non-woven fabric of the core material is 10-100 g / m 2 .

[0011] The present application also provides a preparation method of the above-mentioned sanitary tampon, comprising the following steps: (a) raw material pretreatment: treating seaweed fiber and cotton fiber; (b) non-woven fabric base making: mixing, carding, laying and hot air bonding the pretreated seaweed fiber and cotton fiber to form a non-woven fabric; (c) absorbent core layer making: processing the prepared non-woven fabric to form a core material; (d) outer covering layer wrapping: wrapping the core material with non-woven fabric and hot melting to fix it, forming a double-layer composite sheet-shaped base material; (e) assembly molding: crosswise overlapping two pieces of the double-layer composite sheet-shaped base material, placing a pull rope and then sending it into a mold for pressing and molding; (f) post-processing.

[0012] Preferably, the pre-treatment of the seaweed fiber in step (a) comprises: washing: water temperature 25-40℃, time 4-10min; crushing: rotation speed 1200-1800r / min, crushing to a particle size of ≤10mm; alkali extraction: NaOH solution mass fraction 1-5%, temperature 75-90℃, constant temperature extraction for 1.5-3h; bleaching: hydrogen peroxide mass fraction 0.5-3%, pH value 8-11, temperature 50-70℃ for 20-40min; drying: hot air temperature 55-75℃, so that the moisture content is controlled at 5-12%.

[0013] Preferably, step (a) further comprises pre-treatment of the cotton fiber, specifically: opening by a fiber opener, opening rotation speed 600-1000r / min.

[0014] Preferably, step (b) specifically comprises: mixing the seaweed fiber and the cotton fiber according to a mass ratio; carding: carding speed 10-25m / min, forming a single fiber web, web thickness 0.2-0.6mm; laid web: laying 3-6 layers, laid web speed 10-25m / min, total thickness 0.8-1.5mm; hot air bonding: temperature 120-140℃, air speed 8-18m / s, time 25-50s, forming a non-woven fabric base.

[0015] Preferably, the hot melt fixing method in step (d) is ultrasonic sealing or hot pressing sealing. The pressing forming in step (e) has a pressure of 0.5-2.0MPa, a temperature of 80-120℃, and a pressing time of 5-30s.

[0016] Preferably, the post-processing in step (f) comprises: cutting by a hob cutter, cutting length 90-110mm, diameter 15-25mm.

[0017] The beneficial effects of the present application are: The core functional layer of the present application adopts seaweed fiber material with natural antibacterial effect throughout, without the need for additional addition of any chemical antibacterial agent, so as to realize an antibacterial rate of more than 90% on common pathogenic bacteria such as Escherichia coli, Staphylococcus aureus and Candida albicans, and a sustained antibacterial time of more than 8 hours. This eliminates the risk of chemical stimulation and allergy from the source of the material, actively creates a microenvironment that is not conducive to the breeding of pathogenic bacteria by stably releasing beneficial ingredients such as calcium ions, and fundamentally significantly reduces the risk of toxic shock syndrome (TSS), providing users with unprecedented built-in active health protection.

[0018] The present application realizes synergistic effect of absorption performance and structural reliability by combining the unique “cross” laminated structure with the high-multiplying water absorption and swelling characteristics of seaweed fiber material. The cotton strip can rapidly swell after absorbing menstrual blood, pushing the seamless outer coating layer to fit the folds of the vaginal wall, forming a self-adaptive sealing barrier, and effectively preventing side leakage of menstrual blood. The water absorption rate is more than 800%, far exceeding the national standard requirements, ensuring sufficient absorption capacity and reliable leakage protection when a large amount of menstrual blood gushes.

[0019] The “narrow at the bottom and wide at the top” cylindrical structure formed by precise mold pressing is more in line with ergonomics, easy to insert and naturally fit the vaginal structure, minimizing foreign body sensation and friction discomfort. The soft and smooth properties of seaweed fiber itself, as well as the precisely designed breathable micropores on the outer coating layer, together ensure comfortable and breathable experience throughout the use process (whether in dry or saturated state), avoiding the dryness or swelling pain problems that may be caused by traditional products.

[0020] The main material of the present application adopts renewable seaweed fiber and cotton fiber from the ocean, which is sustainable and biodegradable in material source, greatly reducing the dependence on non-renewable petroleum-based raw materials. The entire product avoids the use of chlorine bleaching and chemical antibacterial agents from material to processing, reducing environmental load and meeting the urgent needs of modern consumers for green, low-carbon and recyclable consumer goods. The provided preparation method has clear parameters and clear process, and each key process link (such as fiber mixing ratio, non-woven cloth grammage, hot air bonding parameters, pressing conditions, etc.) has been optimized and designed, which has good compatibility with existing high-speed production lines, ensuring the retention of natural functional ingredients of seaweed fiber and the uniformity and stability of the performance of the final product, and has the reliability and scalability of large-scale industrial production.

[0021] In summary, the present application, through the deep integration of material innovation and structural design, systematically solves the inherent problems of traditional sanitary tampons in biological safety, reliable leakage prevention, comfortable use, and material environmental protection, successfully realizes the unification of efficient protection, health safety, ultimate comfort, and environmental friendliness, and provides a new high-end sanitary tampon solution with active health care function for the market. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 For the photo of the absorbent core layer before water absorption; Figure 2 For the photo of the absorbent core layer after water absorption; Figure 3 Test report 1 of the seaweed fiber material used in the present application; Figure 4 Test report 2 of the seaweed fiber material used in the present application; Figure 5 Test report 3 of the seaweed fiber material used in the present application. DETAILED DESCRIPTION

[0023] The technical solutions provided by the present application will be described in detail below in conjunction with examples, but they should not be understood as limiting the scope of protection of the present application.

[0024] Example 1 The overall structure of the sanitary tampon is as follows from outside to inside: Overall structure of the sanitary tampon The sanitary tampon mainly consists of an absorbent core and a pull rope connected to one end of the absorbent core. The absorbent core is a multi-layer structure, which is arranged in layers around a central axis from the inside to the outside. The core includes: core material: as the main absorption layer, composed of seaweed fiber non-woven fabric, responsible for quickly absorbing and locking a large amount of liquid.

[0025] The seaweed fiber non-woven fabric prepared above is processed into a non-woven fabric roll with a grammage of 22.5 g / m 2 , which will be used as the base outer covering layer and the core material for preparing the outer covering layer. Bacteriostatic rate: ≥90% for E. coli and S. aureus, and continuous bacteriostatic time ≥8h 1. Outer covering layer (surface layer) At least one layer of seaweed fiber non-woven fabric covering the surface of the core material, as the surface layer directly contacting the vaginal wall, responsible for the initial liquid diversion and bacteriostatic function. A seaweed fiber non-woven fabric with a grammage of 22.5 g / m 2 , with air holes with a diameter of 0.65 mm and a hole density of 35 / cm 2 , is used.

[0026] 2. Absorbent core The seaweed fiber non-woven fabric is processed into a non-woven fabric roll with a grammage of 22.5 g / m 2 , and is stacked to form an absorbent body with a certain thickness and loft as a core absorbent layer 3. Wrapping of the outer covering layer: another piece of seaweed fiber non-woven fabric is used as an outer covering layer to completely wrap the shaped core material, and is fixed at the edges by hot melting to form a complete double-layer composite sheet-shaped base material.

[0027] 4. Final assembly and shaping of the sanitary tampon Two pieces of the double-layer composite sheet-shaped base material prepared above are arranged in a cross shape with the center axis as the intersection point. The pull rope is placed at the bottom of the intersection point of the two pieces of base material. Then the entire assembly is sent into a mold to be pressed under certain temperature and pressure to form a traditional cylindrical sanitary tampon prototype. Finally, the finished product is obtained through subsequent cutting, sterilization, packaging and other processes.

[0028] 5. Working principle and synergistic effect The technical solution of the present application realizes synergistic effect through the combination of materials and structure: initial bacteriostasis and fitting: when used, the outer covering layer first contacts the vaginal wall, and the seaweed fiber begins to play a selective bacteriostatic role. The "narrow at the bottom and wide at the top" structure of the tampon (achieved by mold design during pressing) is easy to place and can better fit the vaginal structure, increasing the bacteriostatic contact surface. Absorption and expansion and long-acting bacteriostasis: when the menstrual blood is absorbed, the seaweed fiber in the core material rapidly expands, pushing the outer covering layer to fit the vaginal wall more closely, ensuring that there is no dead angle for bacteriostasis. At the same time, the sodium ions in the blood trigger the seaweed fiber in the core material and the outer covering layer to continuously exchange ions, stably and long-acting releasing calcium ions during the entire use period, creating a microenvironment that inhibits Staphylococcus aureus, Candida albicans and Escherichia coli, and fundamentally reducing the risk of TSS.

[0029] The production process flow includes raw material pretreatment, outer covering layer, absorbent core layer manufacturing, multi-layer composite shaping, post-treatment and quality inspection.

[0030] In the raw material pretreatment stage, the core raw materials include seaweed fiber with a length of 4 mm and a fineness of 1.35 dtex, cotton fiber with a length of 3 mm and a fineness of 1.1 dtex, and seaweed fiber absorbent body seaweed fiber non-woven fabric surface layer.

[0031] The seaweed raw material (brown algae / red algae) is cleaned (water temperature 32.5 DEG C, cleaning time 6.5 min), broken (rotating speed 1500 r / min, broken to a particle size of less than or equal to 5 mm), extracted by alkali method (NaOH solution mass fraction 2.5%, constant temperature extraction at 82.5 DEG C for 2 h, and seaweed fiber is separated), bleached (hydrogen peroxide mass fraction 1.5%, pH value 9.5, 60 DEG C treatment for 30 min), and dried (hot air temperature 65 DEG C, water content is controlled at 9%), and the seaweed fiber material detection report used in the present application is as shown in Figures 3-5 .

[0032] The cotton fiber is opened by a fiber opening machine (rotating speed 800 r / min), and after the neps and impurities are removed, the cotton fiber is mixed with the seaweed fiber in a cotton mixing machine at a mass ratio of 1:9 (mixing time 12.5 min, uniformity greater than or equal to 95%). When the outer covering functional layer is made, the mixed fiber is sent into a carding machine to be carded into a single fiber web (carding speed 17.5 m / min, web thickness 0.4 mm), is laminated by a lapper (4 layers, lapping speed 17.5 m / min, total thickness 1.1 mm), and then is bonded by a hot air bonding machine (hot air temperature 130 DEG C, air speed 12.5 m / s, bonding time 35 s) to form a non-woven fabric base (grammage 22.5 g / m 2 ).

[0033] The absorbent core: the seaweed fiber non-woven fabric is processed into a non-woven fabric roll with a grammage of 22.5 g / m 2 , and is stacked to form an absorbent body with a certain thickness and bulkiness as a core absorbent layer. The photo before water absorption is as shown in Figure 1 , and the photo after water absorption is as shown in Figure 2 .

[0034] The wrapping of the outer covering layer: another piece of seaweed fiber non-woven fabric is used as the outer covering layer, the shaped core material is completely wrapped therein, and is fixed at the edge by a hot melting method to form a complete double-layer composite sheet-shaped base material.

[0035] Final assembly and shaping of the sanitary tampon Two pieces of the double-layer composite sheet-shaped base material prepared above are arranged in a cross shape with the center axis as the intersection. The pull rope is placed at the bottom of the intersection of the two pieces of base material. Subsequently, the whole assembly is sent into a mold to be pressed under certain temperature and pressure to form a traditional cylindrical sanitary tampon prototype.

[0036] The traditional cylindrical sanitary tampon is precisely cut by a hob cutter (length 100 mm, diameter 20 mm, cutting accuracy ±0.5 mm), and the integrity of each layer of the composite, the leak-proof and edge-sealing property, the thickness uniformity (deviation less than or equal to 0.1 mm), the water absorption performance (water absorption rate greater than or equal to 800%), and the production qualified rate (greater than or equal to 98%) are detected.

[0037] The technical solution is realized by the natural antibacterial components (such as seaweed polysaccharide) contained in the seaweed fiber itself, without adding chemical bacteriostatic agents, and is safer. Each process step is controlled by special equipment parameters to ensure stable and repeatable functions.

[0038] The seaweed fiber water absorption body sanitary tampon of the present embodiment is tested for water absorption capacity. When the seaweed fiber superabsorbent material addition amount is 5g, the sanitary tampon can absorb more than 50 times the water, which is higher than the water absorption multiple requirement of GB / T 8939-2008 for sanitary tampons (standard requirement ≥ 7).

[0039] Example 2 In this embodiment, the structure of the tampon is the same as that of Example 1, and the production process flow includes raw material pretreatment, outer coating layer, absorbent core layer making, multi-layer composite molding, post-treatment and quality inspection.

[0040] In the raw material pretreatment stage, the core raw materials include seaweed fiber with a length of 4mm and a fineness of 1.35dtex, cotton fiber with a length of 3mm and a fineness of 1.1dtex, and seaweed fiber absorbent seaweed fiber non-woven fabric surface layer.

[0041] The seaweed raw material (brown algae / red algae) is cleaned (water temperature 32.5℃, cleaning time 6.5min), broken (rotating speed 1500r / min, broken to particle size ≤5mm), extracted by alkali method (NaOH solution mass fraction 2.5%, constant temperature extraction at 82.5℃ for 2h, and seaweed fiber is obtained by separation), bleached (hydrogen peroxide mass fraction 1.5%, pH value 9.5, 60℃ treatment for 30min), and dried (hot air temperature 65℃, water content controlled at 9%).

[0042] The cotton fiber is opened by a fiber opener (rotating speed 800r / min), and after removing the neps and impurities, it is mixed with the seaweed fiber in a cotton mixer at a mass ratio of 3:7 (mixing time 12.5min, uniformity ≥95%). When making the outer coating functional layer, the mixed fiber is fed into a carding machine to be carded into a single fiber web (carding speed 17.5m / min, web thickness 0.4mm), and then stacked by a web laying machine (4 layers, web laying speed 17.5m / min, total thickness 1.1mm), and then bonded by a hot air bonding machine (hot air temperature 130℃, air speed 12.5m / s, bonding time 35s) to form a non-woven fabric base (gram weight 23g / m 2 ).

[0043] Absorbent core: The seaweed fiber non-woven fabric is processed into a non-woven fabric roll with a gram weight of 23g / m 2 , and through stacking, an absorbent body with a certain thickness and bulkiness is formed as the core absorbent layer.

[0044] The outer covering layer is wrapped: another piece of seaweed fiber non-woven fabric is used as the outer covering layer, the formed core material is completely wrapped therein, and is fixed at the edge by a hot melting method, to form a complete double-layer composite sheet-shaped base material.

[0045] Final assembly of the sanitary tampon Two pieces of the double-layer composite sheet-shaped base material prepared above are arranged in a cross shape with the center axis as the intersection point. The pull rope is placed at the bottom of the intersection point of the two pieces of base material. Subsequently, the entire assembly is sent into a mold for pressing under certain temperature and pressure, so as to form a traditional cylindrical sanitary tampon prototype.

[0046] A hob cutter is used to accurately cut the traditional cylindrical sanitary tampon (length 100 mm, diameter 10 mm, cutting accuracy ±0.5 mm), detect the integrity of each layer of the composite, the leak-proof and edge sealing performance, the thickness uniformity (deviation ≤0.1 mm), the water absorption performance (water absorption rate ≥800%, and the production qualified rate (≥98%).

[0047] The technical scheme realizes the natural antibacterial function through the natural antibacterial components (such as seaweed polysaccharide) contained in the seaweed fiber itself, without the need to add chemical antibacterial agents, and is safer. The function is stable and repeatable through the control of the parameters of the special equipment in each process step.

[0048] The seaweed fiber water absorption body sanitary tampon of the present embodiment is tested for water absorption capacity. When the seaweed fiber superabsorbent material addition amount is 5 g, the sanitary tampon can absorb more than 50 times the amount of water, which is higher than the water absorption multiple requirement of GB / T 8939-2008 (standard requirement ≥7) for sanitary tampons.

[0049] Example 3 In this embodiment, the structure of the tampon is the same as that of Example 1, and the production process flow includes raw material pretreatment, outer covering layer, absorbent core layer making, multi-layer composite molding, post-treatment and quality inspection.

[0050] In the raw material pretreatment stage, the core raw materials include seaweed fiber with a length of 4 mm and a fineness of 1.35 dtex, cotton fiber with a length of 3 mm and a fineness of 1.1 dtex, and seaweed fiber non-woven fabric surface layer of seaweed fiber absorbent.

[0051] The seaweed raw material (brown algae / red algae) is cleaned (water temperature 32.5℃, cleaning time 6.5 min), broken (rotating speed 1500 r / min, broken to a particle size ≤5 mm), extracted by alkali method (NaOH solution mass fraction 2.5%, constant temperature extraction at 82.5℃ for 2h, and seaweed fiber is separated), bleached (hydrogen peroxide mass fraction 1.5%, pH value 9.5, 60℃ treatment for 30 min), and dried (hot air temperature 65℃, water content controlled at 9%).

[0052] Cotton fibers are opened by a fiber opening machine (rotating speed 800 r / min), and after removing neps and impurities, the cotton fibers are mixed with seaweed fibers in a cotton mixer at a mass ratio of 4:6 (mixing time 12.5 min, uniformity ≥95%). When the outer covering functional layer is made, the mixed fibers are sent into a carding machine to be carded into a single fiber web (carding speed 17.5 m / min, web thickness 0.4 mm), and after lamination (4 layers, laying speed 17.5 m / min, total thickness 1.1 mm) by a laying machine, a non-woven fabric base (gram weight 21 g / m 2 ).

[0053] Absorbent core: seaweed fiber non-woven fabric is processed into a non-woven fabric roll with a gram weight of 21 g / m 2 , and through stacking, an absorbent body with a certain thickness and bulkiness is formed as a core absorbent layer.

[0054] Wrapping of the outer covering layer: another piece of seaweed fiber non-woven fabric is used as the outer covering layer to completely wrap the shaped core material, and is fixed by a hot melt method at the edge to form a complete double-layer composite sheet-shaped base material.

[0055] Final assembly and shaping of the sanitary tampon Two pieces of the double-layer composite sheet-shaped base material prepared above are arranged in a cross shape with the center axis as the intersection point. The pull rope is placed at the bottom of the intersection point of the two pieces of base material. Subsequently, the entire assembly is sent into a mold for pressing under certain temperature and pressure to form a traditional cylindrical sanitary tampon prototype.

[0056] A hob cutter precisely cuts the traditional cylindrical sanitary tampon (length 100 mm, diameter 30 mm, cutting accuracy ±0.5 mm), detects the integrity of each layer of the composite, the leak-proof and edge-sealing property, the thickness uniformity (deviation ≤0.1 mm), the water absorption performance (water absorption rate ≥800%, and the production qualified rate (≥98%).

[0057] The technical scheme realizes natural antibacterial components (such as seaweed polysaccharides) contained in seaweed fibers, without the need to add chemical antibacterial agents, and is safer. The functional stability is ensured by controlling parameters of special equipment in each process step, which is repeatable.

[0058] The seaweed fiber water-absorbing body sanitary tampon of the present embodiment is tested for water absorption capacity. When the seaweed fiber superabsorbent material addition amount is 5 g, the sanitary tampon can absorb more than 50 times the water, which is higher than the water absorption multiple requirement (standard requirement ≥7) of GB / T 8939-2008 for sanitary tampons.

[0059] Example 4 In this embodiment, the cotton structure is the same as that of Embodiment 1, and the production process flow includes raw material pretreatment, outer coating layer, absorbent core layer manufacturing, multi-layer composite molding, post-treatment and quality inspection.

[0060] In the raw material pretreatment stage, the core raw materials include seaweed fibers with a length of 4 mm and a fineness of 1.35 dtex, cotton fibers with a length of 3 mm and a fineness of 1.1 dtex, and seaweed fiber absorbent seaweed fiber non-woven fabric surface layer.

[0061] The seaweed raw material (brown algae / red algae) is cleaned (water temperature 32.5°C, cleaning time 6.5 min), broken (rotating speed 1500 r / min, broken to a particle size ≤5 mm), alkali extracted (NaOH solution mass fraction 2.5%, constant temperature extraction at 82.5°C for 2h, and seaweed fiber is separated), bleached (hydrogen peroxide mass fraction 1.5%, pH value 9.5, 60°C treatment for 30 min), and dried (hot air temperature 65°C, water content controlled at 9%).

[0062] The cotton fibers are opened by a fiber opener (rotating speed 800 r / min), and after removing the neps and impurities, they are mixed with the seaweed fibers in a cotton mixer at a mass ratio of 4:6 (mixing time 12.5 min, uniformity ≥95%). When manufacturing the outer coating functional layer, the mixed fibers are fed into a carding machine to be carded into a single fiber web (carding speed 17.5 m / min, web thickness 0.4 mm), and then stacked by a laying machine (4 layers, laying speed 17.5 m / min, total thickness 1.1 mm), and then bonded by a hot air bonding machine (hot air temperature 130°C, air speed 12.5 m / s, bonding time 35 s) to form a non-woven fabric base (gram weight 24 g / m2).

[0063] Absorbent core The seaweed fiber non-woven fabric is processed into a non-woven fabric roll with a gram weight of 24 g / m2, and through stacking, an absorbent with a certain thickness and loft is formed as the core absorbent layer. 2

[0064] Outer coating layer wrapping: another piece of seaweed fiber non-woven fabric is used as the outer coating layer, which completely wraps the formed core material, and is fixed at the edge by hot melting, forming a complete double-layer composite sheet-shaped base material.

[0065] Final assembly and molding of sanitary tampons Two pieces of the above-mentioned double-layer composite sheet-shaped base material are taken and arranged in a cross shape with the center axis as the intersection. The pull rope is placed at the bottom of the intersection of the two base materials. Then the whole assembly is fed into a mold to be pressed under certain temperature and pressure, so as to form a traditional cylindrical sanitary tampon prototype.

[0066] ​The rotary cutter cutting machine precisely cuts the traditional cylindrical sanitary tampon (length 100 mm, diameter 5 mm, cutting accuracy ±0.5 mm), detects the integrity of each layer, leak-proof barrier seal, thickness uniformity (deviation ≤0.1 mm), water absorption performance (water absorption rate ≥800%, and production qualified rate (≥98%).

[0067] The technical scheme realizes natural antibacterial components (such as seaweed polysaccharide) contained in the seaweed fiber itself, without adding chemical bacteriostatic agents, and is safer. Each process step is controlled by special equipment parameters to ensure stable and repeatable functions.

[0068] The seaweed fiber water absorption body sanitary tampon of the present embodiment is tested for water absorption capacity. When the seaweed fiber superabsorbent material addition amount is 5g, the sanitary tampon can absorb more than 50 times the water, which is higher than the water absorption requirement of GB / T8939-2008 (standard requirement ≥7).

[0069] The above is only the preferred embodiment of the present application, it should be noted that for those skilled in the art, without departing from the principles of the present application, can make a number of improvements and refinements, these improvements and refinements should also be considered within the scope of the present application.

Claims

1. A sanitary tampon, characterized in that, It includes an absorbent core and a pull cord connected to one end of the absorbent core; the absorbent core has a multi-layer structure, which is stacked around a central axis from the inside to the outside, and its whole includes, from the outside to the inside, a seaweed fiber non-woven fabric surface layer as an outer covering layer and a core material as a core absorbent layer. The core material is made of seaweed fiber nonwoven fabric; The outer covering layer is at least one layer of seaweed fiber nonwoven fabric covering the outer surface of the core material; The nonwoven fabric is made by mixing seaweed fiber and cotton fiber in a mass ratio of 0.1 to 100:1; The absorbent core is formed by two double-layer composite sheet substrates arranged in a cross shape with the central axis as the intersection point and pressed into a cylindrical structure; the double-layer composite sheet substrate is formed by the core material being wrapped by an outer covering layer and fixed at the edge by hot melting.

2. The tampons according to claim 1, characterized in that, The outer coating layer of seaweed fiber nonwoven fabric has a basis weight of 10~100 g / m². 2 .

3. The tampon according to claim 2, characterized in that, The outer coating layer of seaweed fiber nonwoven fabric has breathable holes; The diameter of the vent holes is 0.4~0.9 mm, and the pore density is 25~45 pores / cm³. 2 .

4. The tampon according to claim 1, characterized in that, The core material, seaweed fiber nonwoven fabric, has a basis weight of 10~100 g / m². 2 .

5. A method for preparing a tampon as described in any one of claims 1 to 4, characterized in that, Includes the following steps: (a) Raw material pretreatment: processing seaweed fiber and cotton fiber; (b) Non-woven fabric substrate preparation: pretreated seaweed fibers are mixed with cotton fibers, combed, laid into a web, and bonded with hot air to form a non-woven fabric; (c) Absorbent core layer fabrication: The prepared nonwoven fabric is processed to form the core material; (d) Outer covering layer: The core material is wrapped with non-woven fabric and fixed by heat fusion to form a double-layer composite sheet substrate; (e) Assembly and molding: The two double-layer composite sheet substrates are stacked in a cross shape, and after placing the pull rope, they are sent into the mold for pressing and molding. (f) Post-processing.

6. The preparation method according to claim 5, characterized in that, The pretreatment of seaweed fibers in step (a) includes: Cleaning: Water temperature 25~40℃, time 4~10 minutes; Crushing: Rotation speed 1200~1800 r / min, crush to particle size ≤10mm; Alkaline extraction: NaOH solution mass fraction 1~5%, temperature 75~90℃, constant temperature extraction for 1.5~3h; Bleaching: Hydrogen peroxide mass fraction 0.5~3%, pH value 8~11, temperature 50~70℃ for 20~40 min; Drying: Hot air temperature 55~75℃, so that the moisture content is controlled at 5~12%.

7. The preparation method according to claim 5, characterized in that, Step (a) also includes the pretreatment of cotton fibers, specifically: opening the fibers using a fiber opener at a speed of 600~1000 r / min.

8. The preparation method according to claim 5, characterized in that, Step (b) specifically includes: Mix seaweed fiber and cotton fiber in a certain mass ratio; Combing: Combing speed 10~25m / min, forming a single fiber web with a web thickness of 0.2~0.6mm; Netting installation: Lay 3 to 6 layers at a speed of 10 to 25 m / min, with a total thickness of 0.8 to 1.5 mm; Hot air bonding: temperature 120~140℃, wind speed 8~18m / s, time 25~50s, to form a non-woven fabric substrate.

9. The preparation method according to claim 5, characterized in that, The hot-melt fixing method described in step (d) is ultrasonic edge sealing or hot-press edge sealing; The pressing pressure in step (e) is 0.5~2.0 MPa, the temperature is 80~120℃, and the pressing time is 5~30s.

10. The preparation method according to claim 5, characterized in that, The post-processing described in step (f) includes cutting using a rotary cutter with a cutting length of 90-110 mm and a diameter of 15-25 mm.

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