WO2021042717A1 - 一种海藻改性pp纺粘无纺布 - Google Patents

一种海藻改性pp纺粘无纺布 Download PDF

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Publication number
WO2021042717A1
WO2021042717A1 PCT/CN2020/082974 CN2020082974W WO2021042717A1 WO 2021042717 A1 WO2021042717 A1 WO 2021042717A1 CN 2020082974 W CN2020082974 W CN 2020082974W WO 2021042717 A1 WO2021042717 A1 WO 2021042717A1
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WIPO (PCT)
Prior art keywords
modified
seaweed
woven fabric
alginic acid
spunbond nonwoven
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PCT/CN2020/082974
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English (en)
French (fr)
Inventor
黄效华
黄效谦
刘宇
刘洁
黄效龙
甄丽
Original Assignee
中科纺织研究院（青岛）有限公司
百事基材料（青岛）股份有限公司
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Publication of WO2021042717A1 publication Critical patent/WO2021042717A1/zh

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/10—Other agents for modifying properties
    • D01F1/103—Agents inhibiting growth of microorganisms
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L5/00—Compositions of polysaccharides or of their derivatives not provided for in groups C08L1/00 or C08L3/00
    • C08L5/04—Alginic acid; Derivatives thereof
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/10—Other agents for modifying properties
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
    • D01F6/46—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyolefins
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
    • D01F9/04—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of alginates
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/005—Synthetic yarns or filaments
    • D04H3/007—Addition polymers
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/14—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/16—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion

Definitions

  • the invention relates to the technical field of spunbond non-woven fabrics, in particular to a seaweed modified pp spunbond non-woven fabric.
  • pp spunbond non-woven fabric is made of polypropylene raw materials and bonded into a net by high-temperature spinning carding to form a breathable but not permeable fiber structure. It is mainly used for disposable medical and sanitary products, disposable anti-fouling clothing, agricultural cloth, Furniture cloth and lining materials, etc.
  • the surface layers of existing pp spunbond non-woven sanitary products are mostly perforated film, hot-air non-woven fabric and pure cotton spunlace non-woven fabric, which has the following problems: such as poor air permeability of perforated film non-woven fabric; hot-air non-woven fabric The dryness of the cloth is good, but the biocompatibility is poor, and the burr feel is strong; while the dryness of the pure cotton spunlace non-woven fabric is poor, and it is easy to produce a feeling of wet adhesion.
  • the current pp spunbond non-woven fabrics still face the problem of not having both air permeability and mechanical properties.
  • the patent CN 102336961 B and the patent CN 102336929 B respectively disclose a pp spunbonded non-woven fabric modified with heavy calcium carbonate and corn starch. Both the woven composite material and a corn starch modified pp spunbond non-woven fabric have environmental protection functions and are degradable, but the addition of corn starch causes a reduction in the breaking strength of the non-woven fabric and poor mechanical properties.
  • Cigar Patent Publication Number: CN208760115U discloses an antibacterial spunbond nonwoven fabric, which includes a first ion sterilization layer, a first bamboo charcoal fiber layer, a first spunbonded nonwoven fabric layer, and a first Resin bonding layer, reinforced base layer, second resin bonding layer, second spunbonded non-woven fabric layer, second bamboo charcoal fiber layer, second ion sterilization layer; wherein the first spunbonded non-woven fabric layer is made of antibacterial polypropylene spun
  • the antibacterial polypropylene spunbond nonwoven fabric is made of antibacterial and degradable polypropylene spunbond nonwoven fabric masterbatch through spunbonding; the second spunbond nonwoven fabric layer is made of polyethylene polypropylene spunbonded nonwoven fabric.
  • the said polyethylene polypropylene spunbond non-woven fabric is made of antibacterial polyethylene polypropylene spunbonded non-woven fabric masterbatch through spunbonding.
  • the patent only briefly introduces the structure of the antibacterial non-woven fabric, its specific preparation process is not disclosed, nor does it solve the technical problems of moisture absorption and air permeability of the spunbonded non-woven fabric.
  • Chinese Patent Number: CN103132319A discloses a flame-retardant spunbonded non-woven fabric, preparation method and application thereof.
  • the flame-retardant spunbond non-woven fabric is made of the following components by weight: 60-80 parts of spunbond non-woven fabric, 15-30 parts of flame retardant and 5-10 parts of coupling agent.
  • the preparation method is as follows: Weigh 15-30 parts of flame retardant to prepare an aqueous solution with a mass fraction of 15-30% to form a flame-retardant liquid; add 5-10 parts of coupling agent to the flame-retardant liquid, and stir thoroughly to form a flame-retardant liquid.
  • the flame-retardant spunbond non-woven fabric is prepared by drying.
  • the prepared flame-retardant spunbond non-woven fabrics are overlapped, needle-punched and reinforced, and cut according to specifications to obtain automobile decoration materials.
  • the prepared flame-retardant spunbond non-woven fabric is rinsed, air-dried, and cut to size according to specifications to obtain a home textile material.
  • the patent solves the technical problem of flame retardant spunbond non-woven fabric, but still does not solve the technical problem of moisture absorption and air permeability.
  • non-woven products with good moisture absorption and air permeability, good antibacterial properties, soft and skin-friendly, good biocompatibility, and excellent mechanical properties are in urgent need of development.
  • the purpose of the present invention is to provide a seaweed modified pp spunbond non-woven fabric.
  • a seaweed modified pp spunbond non-woven fabric characterized in that: the PP spunbond non-woven fabric contains 0.1-2% of alginate.
  • the moisture regain rate of the seaweed modified pp spunbond non-woven fabric is 0.2-3.5%, and the antibacterial rate is ⁇ 98%;
  • the alginate in the seaweed modified pp spunbond non-woven fabric is modified with alginic acid: the raw materials for the preparation of the seaweed modified pp spunbond non-woven fabric also include polypropylene, polyethylene glycol, and poly Vinylpyrrolidone and antioxidants;
  • the antioxidant is antioxidant 3125 or antioxidant 2013;
  • the alginate is prepared according to the following steps:
  • the solvent is N,N-dimethylformamide or dimethylsulfoxide
  • the polyamine is hexamethylenediamine or tris(2-aminoethyl)amine
  • the mass ratio of alginic acid, solvent, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride, N-hydroxysuccinimide, polyamine and deionized water is 100:300 ⁇ 600: 5-15: 7-14: 1-10: 300-600.
  • the alginate prepared by the invention utilizes the reaction of the carboxyl group in the alginic acid and the amino group in the polyamine to obtain a cross-linked modified alginic acid to form a dense interpenetrating grid structure, and a dialysis bag cuts off large particles with a molecular weight of more than 3500 Molecules, on the one hand, make the seaweed modified pp spunbond non-woven fabric retain the rapid degradation performance of alginic acid, on the other hand, the macromolecular grid structure ensures that the non-woven fabric has high mechanical strength and wear resistance;
  • the modified alginic acid has both hydrophilic functional groups such as hydroxyl and amide groups and hydrophobic functional groups such as branched alkyl groups.
  • the non-woven fabric After being spun with pp into a non-woven fabric, it forms amphoteric surfactant-like in the pp fiber. Performance, so that when the surface of the non-woven fabric is exposed to liquid, the surface tension of the liquid can be significantly reduced, so that the non-woven fabric has good hygroscopicity and dryness; in addition, the dense interpenetrating grid structure formed by the modified alginic acid has a large amount of The voids form a sponge-like structure, which can quickly absorb water and has a large amount of water absorption performance.
  • the polyethylene glycol is polyethylene glycol 4000 or polyethylene glycol 6000.
  • the molecular weight of the preferred polyethylene glycol species is moderate, which can increase the tensile strength of the seaweed modified pp spunbond non-woven fabric by 10-15% .
  • the polyvinylpyrrolidone is polyvinylpyrrolidone K30, and the preferred polyvinylpyrrolidone K30 has low viscosity and better smoothness of the non-woven fabric.
  • Adding a proper proportion of polyethylene glycol and polyvinylpyrrolidone can increase the compatibility between alginate and polypropylene, reduce the roughness of a single material after the alginate and polypropylene are melted, and increase the smoothness of the non-woven fabric performance;
  • the present invention also includes a preparation method of seaweed modified pp spunbond non-woven fabric, including the following steps:
  • the alginate is prepared according to the following steps:
  • the antioxidant is antioxidant 3125 or antioxidant 2013; the function of antioxidant is mainly to prevent the carbonization of alginate when added to high-temperature polypropylene, and antioxidant 3125 or antioxidant 2013 has better flow It can significantly reduce the degree of carbonization of modified alginate and prevent the modification of alginate from structural changes and loss of functionality due to carbonization.
  • step 2 The mixture obtained in step 1 is pressed into the spinning box body, and the fiber web is obtained by spinning and pulling, and the obtained fiber web is hot-rolled into a cloth on a hot rolling machine to obtain a seaweed modified pp spunbond non-woven fabric.
  • step 2 the temperature of the roll of the fiber web on the hot rolling mill is 140-150°C.
  • the working pressure of pressing the melt into the spinning box in step 2 is 2-5 MPa.
  • the invention also includes the use of a seaweed modified pp spunbond non-woven fabric for disposable medical and sanitary products, such as sanitary napkins for women, baby diapers, wet facial tissues, breast pads and the like.
  • the present invention has the following advantages:
  • the modified alginic acid has both hydrophilic functional groups such as hydroxyl and amide groups and hydrophobic functional groups such as branched alkyl groups, after spinning with pp into a non-woven fabric, a similar amphoteric surface activity is formed in the pp fiber
  • the performance of the agent can give protons and accept protons, so that when the surface of the non-woven fabric is exposed to liquid, the surface tension of the liquid can be significantly reduced, so that the non-woven fabric has good hygroscopicity and dryness; in addition, it is formed by modified alginic acid
  • the prepared PP spunbond non-woven fabric has excellent antibacterial properties, and the comprehensive antibacterial rate is above 98%.
  • the macromolecular mesh structure of the fiber ensures that the non-woven fabric has higher mechanical strength and wear resistance, and the breaking strength and elongation at break are higher than that of conventional pp spunbonded non-woven fabrics.
  • the abrasion resistance is at least 30% higher than that of conventional products.
  • the seaweed modified pp spunbond nonwoven fabric of the present invention due to the microporous structure, makes the product air permeability more than double that of the conventional pp spunbond nonwoven fabric, and has good air permeability and moisture absorption. In comparison, the resurgence of synthetic fibers in the industry is almost zero, the last major breakthrough.
  • the seaweed modified pp spunbond nonwoven fabric of the present invention is soft and skin-friendly, and has good biocompatibility.
  • a seaweed modified pp spunbond non-woven fabric composed of the following raw materials: 90 kg of polypropylene, 0.2 kg of modified alginic acid, 1 kg of polyethylene glycol, 0.3 kg of polyvinylpyrrolidone and 0.3 kg of antioxidants;
  • the antioxidant is antioxidant 3125;
  • the modified alginic acid is prepared according to the following steps:
  • a seaweed modified pp spunbond non-woven fabric which is composed of the following raw materials: polypropylene 100kg, modified alginic acid 1kg, polyethylene glycol 5kg, polyvinylpyrrolidone 0.1kg and antioxidant 0.6kg;
  • the antioxidant is antioxidant 2013;
  • the modified alginic acid is prepared according to the following steps:
  • a seaweed modified pp spunbond non-woven fabric consisting of the following raw materials: 94kg of polypropylene, 1.2kg of modified alginic acid, 4kg of polyethylene glycol, 0.15kg of polyvinylpyrrolidone and 0.4kg of antioxidant;
  • the antioxidant is antioxidant 3125;
  • the modified alginic acid is prepared according to the following steps:
  • a seaweed modified pp spunbond non-woven fabric composed of the following raw materials: 95kg of polypropylene, 1.5kg of modified alginic acid, 40003kg of polyethylene glycol, polyvinylpyrrolidone K300.2kg and 0.5kg of antioxidant;
  • the antioxidant is antioxidant 3125;
  • the modified alginic acid is prepared according to the following steps:
  • a seaweed modified pp spunbond non-woven fabric composed of the following raw materials: 95kg of polypropylene, 1.9kg of modified alginic acid, 60003kg of polyethylene glycol, polyvinylpyrrolidone K300.2kg and 0.5kg of antioxidant;
  • the antioxidant is antioxidant 3125;
  • the modified alginic acid is prepared according to the following steps:
  • the preparation method of the seaweed modified pp spunbond non-woven fabric described in Example 1 includes the following steps:
  • the modified alginic acid is prepared according to the following steps:
  • the antioxidant is antioxidant 3125;
  • step 2 The mixture obtained in step 1 is hydraulically fed into the spinning box, and the fiber web is obtained by spinning and side blowing the box cooling and traction. The resulting fiber web is hot rolled into a cloth on a hot rolling machine to obtain a seaweed modified pp spunbond nonwoven cloth.
  • the preparation method of the seaweed modified pp spunbond non-woven fabric described in Example 2 includes the following steps:
  • the modified alginic acid is prepared according to the following steps:
  • step 2 The mixture obtained in step 1 is hydraulically fed into the spinning box, and the fiber web is obtained by spinning and side blowing the box cooling and traction. The resulting fiber web is hot rolled into a cloth on a hot rolling machine to obtain a seaweed modified pp spunbond nonwoven cloth.
  • the preparation method of the seaweed modified pp spunbond non-woven fabric described in Example 3 includes the following steps:
  • the modified alginic acid is prepared according to the following steps:
  • the antioxidant is antioxidant 3125;
  • step 2 The mixture obtained in step 1 is hydraulically fed into the spinning box, and the fiber web is obtained by spinning and side blowing the box cooling and traction. The resulting fiber web is hot rolled into a cloth on a hot rolling machine to obtain a seaweed modified pp spunbond nonwoven cloth.
  • the preparation method of the seaweed modified pp spunbond non-woven fabric described in Example 4 includes the following steps:
  • the modified alginic acid is prepared according to the following steps:
  • the antioxidant is antioxidant 3125;
  • step 2 The mixture obtained in step 1 is hydraulically fed into the spinning box, and the fiber web is obtained by spinning and side blowing the box cooling and traction. The resulting fiber web is hot rolled into a cloth on a hot rolling machine to obtain a seaweed modified pp spunbond nonwoven cloth.
  • the preparation method of the seaweed modified pp spunbond non-woven fabric of embodiment 5 includes the following steps:
  • the modified alginic acid is prepared according to the following steps:
  • the antioxidant is antioxidant 3125;
  • step 2 The mixture obtained in step 1 is hydraulically fed into the spinning box, and the fiber web is obtained by spinning and side blowing the box cooling and traction. The resulting fiber web is hot rolled into a cloth on a hot rolling machine to obtain a seaweed modified pp spunbond nonwoven cloth.
  • the air permeability of the seaweed modified pp spunbond non-woven fabric of the present invention is very good, which is more than 100% of that of conventional non-woven fabrics; the breaking strength and elongation at break are both higher than that of conventional pp spinning.
  • the modified alginic acid with a molecular weight of more than 3500 has a dense interpenetrating grid structure to ensure that the non-woven fabric has high mechanical strength and wear resistance.
  • the alginate content of the prepared non-woven fabric is 0.1-2%
  • the prepared fiber has the best antibacterial properties, and the physical properties can meet the needs of production, and when the alginate content is less than At 0.1%, the breathability and antibacterial properties of the prepared non-woven fabric are significantly reduced; when the alginate content is greater than or equal to 2%, the physical indicators of the prepared non-woven fabric decrease significantly, which obviously cannot meet the requirements of normal production and application.
  • the optimal content of alginate in the seaweed modified pp spunbond non-woven fabric prepared by the present invention is 0.1-2%.
  • the seaweed modified pp spunbond non-woven fabrics of Examples 6-10 were tested for water absorption.
  • the comparative example used pp spunbond non-woven fabrics of the same gram weight, and the gram weights were all 20 ⁇ 0.5g/cm 2 , and the water absorption was tested.
  • the alginic acid used in the present invention is commercially available. Except for the requirements in the present invention, its specific indicators have no other additional requirements.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Organic Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Medicinal Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Nonwoven Fabrics (AREA)
  • Artificial Filaments (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

一种海藻改性pp纺粘无纺布，所述PP纺粘无纺布中含有海藻酸盐0.1-2％，所述海藻改性pp纺粘无纺布回潮率0.2-3.5％，抗菌率≥98％；所述海藻改性pp纺粘无纺布，添加了改性海藻酸，同时具有羟基、酰胺基等亲水官能团和支链烷基等疏水官能团，在与pp纺丝成无纺布后，即能给出质子又能接受质子，使得无纺布表面在遇液体时，能够显著降低液体的表面张力；另外改性海藻酸形成的致密的互穿网格结构内有大量空隙，形成了类似海绵的结构，具有良好的吸湿性；且吸水速度快，吸水后表面仍保持干爽，并且能吸收其质量多倍以上的水分，具有很好的亲水性能。

Description

一种海藻改性pp纺粘无纺布 技术领域
本发明涉及纺粘无纺布技术领域，具体说是一种海藻改性pp纺粘无纺布。
背景技术
pp纺粘无纺布是使用聚丙烯原料，经高温喷丝梳理粘结成网形成的透气而非透水的纤维结构，主要用于一次性医疗卫生用品、一次性防污服、农业用布、家具用布和作为衬里材料等。现有pp纺粘无纺布卫生用品的表层多为打孔膜、热风无纺布及纯棉的水刺无纺布，存在以下问题：如打孔膜无纺布的透气性差；热风无纺布的干爽性好，但是生物相容性差，毛刺感强；而纯棉水刺无纺布的干爽性差，易产生潮湿粘附的感觉。
另外，目前pp纺粘无纺布还面临透气性和力学性能不能兼顾的问题，如专利CN 102336961 B和专利CN 102336929 B分别公开了一种重质碳酸钙、玉米淀粉改性的pp纺粘无纺布复合材料和一种玉米淀粉改性的pp纺粘无纺布，它们均具有环保功能，可降解，但是玉米淀粉的加入造成了无纺布断裂强力的降低，力学性能较差。
中国专利公开号：CN208760115U公开了一种抗菌型纺粘无纺布，包括由上至下依次粘接的第一离子杀菌层、第一竹炭纤维层、第一纺粘无纺布层、第一树脂粘接层、增强基层、第二树脂粘接层、第二纺粘无纺布层、第二竹炭纤维层、第二离子杀菌层；其中第一纺粘无纺布层由抗菌聚丙烯纺粘无纺布制成，抗菌聚丙烯纺粘无纺布由抗菌可降解的聚丙烯纺粘无纺布母粒经过纺粘制得；第二纺粘无纺布层由聚乙烯丙纶纺粘无纺布制成，所述的聚乙烯丙纶纺粘无纺布由抗菌的聚乙烯丙纶纺粘无纺布母粒经过纺粘制得。该专利只简单介绍了抗菌无纺布的结构，其具体制备工艺没有公开，也没有解决纺粘无纺布吸湿、透气的技术问题。
中国专利公号：CN103132319A公开了一种阻燃纺粘无纺布、制备方法及其应用。该阻燃纺粘无纺布是由包含以下重量份的组分制成：60-80份纺粘无纺布、15-30份阻燃剂和5-10份偶联剂。其制备方法如下：称取15-30份阻燃剂配制成质量分数为15-30％的水溶液形成阻燃液；将5-10份的偶联剂加入到阻燃液中，充分搅拌均匀成混合液；然后将60-80份纺粘无纺布浸泡在上述混合液中10-20min；最后将浸泡过的纺粘无纺布置于压辊机的两个橡胶压辊之间挤压，烘干制得阻燃纺粘无纺布。将制备的阻燃纺粘无纺布重叠、针刺加固，按照规格裁剪，得到汽车装饰材料。将制备的阻燃纺粘无纺布漂洗、晾干，按照规格裁剪大小，得到家用纺织品材料。该专利解决的是纺粘无纺布阻燃的技术问题，仍然没有解决吸湿、透气的技术问题。
综上所述，吸湿性和透气性好，抗菌性好，柔软亲肤，生物相容性好，力学性能优异 的无纺布产品亟待开发。
发明内容
为解决上述问题，本发明的目的是提供一种海藻改性pp纺粘无纺布。
本发明为实现上述目的，通过以下技术方案实现：
一种海藻改性pp纺粘无纺布，其特征在于：所述PP纺粘无纺布中含有海藻酸盐0.1-2％。
所述海藻改性pp纺粘无纺布回潮率0.2-3.5％，抗菌率≥98％；
所述海藻改性pp纺粘无纺布中的海藻酸盐是以海藻酸改性而成：所述海藻改性pp纺粘无纺布的制备原料还包括聚丙烯，聚乙二醇，聚乙烯吡咯烷酮和抗氧剂；
所述抗氧剂为抗氧剂3125或抗氧剂2013；
其中海藻酸盐按照以下步骤制备得到：
将海藻酸溶于溶剂中，在10～35℃条件下加入1-(3-二甲氨基丙基)-3-乙基碳二亚胺盐酸盐和N-羟基琥珀酰亚胺，搅拌反应5～10小时后，得到反应液，向反应液中加入多元胺，在40～80℃下搅拌反应10～24小时，得到混合液，向混合液中加入去离子水，用分子量3500的透析袋透析得透析液，透析液冻干得改性海藻酸；
所述溶剂是N,N-二甲基甲酰胺或二甲基亚砜；
所述多元胺是己二胺或三(2-氨基乙基)胺；
海藻酸、溶剂、1-(3-二甲氨基丙基)-3-乙基碳二亚胺盐酸盐、N-羟基琥珀酰亚胺、多元胺和去离子水的质量比为100：300～600：5～15：7～14：1～10：300～600。
本发明制备的海藻酸盐，利用海藻酸中的羧基和多元胺中的氨基反应，得到交联的改性海藻酸，形成致密的互穿网格结构，并通过透析袋截留分子量3500以上的大分子，一方面，使海藻改性pp纺粘无纺布保留了海藻酸的快速降解性能，另一方面，大分子的网格结构保证了无纺布具有较高的力学强度和耐磨性能；改性后的海藻酸中由于同时具有羟基、酰胺基等亲水官能团和支链烷基等疏水官能团，在与pp纺丝成无纺布后，在pp纤维中形成了类似两性表面活性剂的性能，使得无纺布表面在遇液体时，能够显著降低液体的表面张力，使得无纺布吸湿性和干爽性好；另外改性后的海藻酸形成的致密的互穿网格结构内有大量空隙，形成了类似海绵的结构，能够快速吸水，并且具有大量吸水的性能。
优选的，聚乙二醇是聚乙二醇4000或聚乙二醇6000，优选的聚乙二醇种类分子量适中，能将海藻改性pp纺粘无纺布的拉伸强度提高10～15％。
优选的，聚乙烯吡咯烷酮为聚乙烯吡咯烷酮K30，优选的聚乙烯吡咯烷酮K30粘度小，无纺布的顺滑性能更好。
加入适当比例的聚乙二醇和聚乙烯吡咯烷酮，能够增加海藻酸盐和聚丙烯之间的兼容 性，减少海藻酸盐和聚丙烯在熔融之后单种物料的粗糙感，增加无纺布的顺滑性能；
本发明还包括一种海藻改性pp纺粘无纺布的制备方法，包括以下步骤：
①按照质量比将聚丙烯和占混合物料总重量0.1-2％的海藻酸盐加入到卧式双螺带混合机中，加热至40～80℃，中速混合20～40分钟，然后向其中加入聚乙二醇，聚乙烯吡咯烷酮和抗氧剂，加热至180～190℃，高速混合20～40分钟，得到混合料；
其中海藻酸盐按照以下步骤制备得到：
将海藻酸溶于溶剂中，在10～35℃条件下加入1-(3-二甲氨基丙基)-3-乙基碳二亚胺盐酸盐和N-羟基琥珀酰亚胺，搅拌反应5～10小时后，得到反应液，向反应液中加入多元胺，在40～80℃下搅拌反应10～24小时，得到混合液，向混合液中加入去离子水，用分子量3500的透析袋透析得透析液，透析液冻干得海藻酸盐；
所述抗氧剂为抗氧剂3125或抗氧剂2013；抗氧化剂的作用主要是防止海藻酸盐加入到高温聚丙烯时的碳化，而抗氧剂3125或抗氧剂2013具有更好的流动性和附着性，可以显著的降低改性海藻酸的碳化程度，防止改性海藻酸盐因碳化而发生结构的变化和失去功能性。
②将步骤①所得混合料压入纺丝箱体，经喷丝、牵引得纤维网，所得纤维网在热轧机上热轧成布，得到海藻改性pp纺粘无纺布。
优选的制备方法，步骤②中纤维网在热轧机上的轧辊温度为140～150℃。
优选的制备方法，步骤②中将熔融体压入纺丝箱体的工作压力为2～5MPa。
本发明还包括一种海藻改性pp纺粘无纺布的用途，用于一次性医疗卫生用品，如妇女卫生巾、婴儿尿不湿、湿面巾、溢乳垫巾等。
本发明相比现有技术具有以下优点：
1、改性后的海藻酸中由于同时具有羟基、酰胺基等亲水官能团和支链烷基等疏水官能团，在与pp纺丝成无纺布后，在pp纤维中形成了类似两性表面活性剂的性能，即能给出质子又能接受质子，使得无纺布表面在遇液体时，能够显著降低液体的表面张力，使得无纺布吸湿性和干爽性好；另外改性海藻酸形成的致密的互穿网格结构内有大量空隙，形成了类似海绵的结构，具有良好的吸湿性；且吸水速度快，吸水后表面仍保持干爽，并且能吸收其质量12倍以上的水分，具有很好的亲水性能，公定回潮0.2-3.5％。
2、通过海藻酸的改性，使制备的PP纺粘无纺布具有优良的抗菌性能，综合抗菌率在98％以上。
3、通过海藻酸的改性，使纤维具有的大分子的网格结构保证了无纺布具有较高的力学强度和耐磨性能，断裂强度和断裂伸长率均高于常规pp纺粘无纺布的20％倍左右，耐磨性较常规产品至少提高30％以上。
4、本发明的海藻改性pp纺粘无纺布，由于结构上的微孔结构，使产品透气率为常规pp纺粘无纺布的一倍以上，具有很好的透气性能及吸湿性，相较而言行业合成纤维回潮几乎为0，上一次较大的突破。
5、本发明的海藻改性pp纺粘无纺布，柔软亲肤，具有良好的生物相容性。
具体实施方式
以下结合具体实施例来对本发明作进一步的描述。
实施例1
一种海藻改性pp纺粘无纺布，由以下原料组成：聚丙烯90kg，改性海藻酸0.2kg，聚乙二醇1kg，聚乙烯吡咯烷酮0.3kg和抗氧剂0.3kg；
所述抗氧剂为抗氧剂3125；
其中改性海藻酸按照以下步骤制备得到：
将100kg海藻酸溶于300kgN,N-二甲基甲酰胺中，在10℃条件下加入5kg 1-(3-二甲氨基丙基)-3-乙基碳二亚胺盐酸盐和7kg N-羟基琥珀酰亚胺，搅拌反应10小时后，得到反应液，向反应液中加入1kg己二胺，在40℃下搅拌反应10小时，得到混合液，向混合液中加入300kg去离子水，用分子量3500的透析袋透析得透析液，透析液冻干得改性海藻酸。
实施例2
一种海藻改性pp纺粘无纺布，由以下原料组成：聚丙烯100kg，改性海藻酸1kg，聚乙二醇5kg，聚乙烯吡咯烷酮0.1kg和抗氧剂0.6kg；
所述抗氧剂为抗氧剂2013；
其中改性海藻酸按照以下步骤制备得到：
将100kg海藻酸溶于600kg二甲基亚砜中，在35℃条件下加入15kg 1-(3-二甲氨基丙基)-3-乙基碳二亚胺盐酸盐和14kg N-羟基琥珀酰亚胺，搅拌反应5小时后，得到反应液，向反应液中加入10kg三(2-氨基乙基)胺，在80℃下搅拌反应24小时，得到混合液，向混合液中加入600kg去离子水，用分子量3500的透析袋透析得透析液，透析液冻干得改性海藻酸。
实施例3
一种海藻改性pp纺粘无纺布，由以下原料组成：聚丙烯94kg，改性海藻酸1.2kg，聚乙二醇4kg，聚乙烯吡咯烷酮0.15kg和抗氧剂0.4kg；
所述抗氧剂为抗氧剂3125；
其中改性海藻酸按照以下步骤制备得到：
将100kg海藻酸溶于400kg N,N-二甲基甲酰胺中，在25℃条件下加入10kg 1-(3-二甲氨基丙基)-3-乙基碳二亚胺盐酸盐和10kg N-羟基琥珀酰亚胺，搅拌反应4小时后，得到反应液，向 反应液中加入5kg己二胺，在50℃下搅拌反应14小时，得到混合液，向混合液中加入400kg去离子水，用分子量3500的透析袋透析得透析液，透析液冻干得改性海藻酸。
实施例4
一种海藻改性pp纺粘无纺布，由以下原料组成：聚丙烯95kg，改性海藻酸1.5kg，聚乙二醇40003kg，聚乙烯吡咯烷酮K300.2kg和抗氧剂0.5kg；
所述抗氧剂为抗氧剂3125；
其中改性海藻酸按照以下步骤制备得到：
将100kg海藻酸溶于400kg二甲基亚砜中，在20℃条件下加入8kg 1-(3-二甲氨基丙基)-3-乙基碳二亚胺盐酸盐和10kg N-羟基琥珀酰亚胺，搅拌反应5小时后，得到反应液，向反应液中加入6kg多元胺，在60℃下搅拌反应15小时，得到混合液，向混合液中加入450kg去离子水，用分子量3500的透析袋透析得透析液，透析液冻干得改性海藻酸。
实施例5
一种海藻改性pp纺粘无纺布，由以下原料组成：聚丙烯95kg，改性海藻酸1.9kg，聚乙二醇60003kg，聚乙烯吡咯烷酮K300.2kg和抗氧剂0.5kg；
所述抗氧剂为抗氧剂3125；
其中改性海藻酸按照以下步骤制备得到：
将100kg海藻酸溶于400kg二甲基亚砜中，在20℃条件下加入8kg 1-(3-二甲氨基丙基)-3-乙基碳二亚胺盐酸盐和10kg N-羟基琥珀酰亚胺，搅拌反应5小时后，得到反应液，向反应液中加入6kg多元胺，在60℃下搅拌反应15小时，得到混合液，向混合液中加入450kg去离子水，用分子量3500的透析袋透析得透析液，透析液冻干得改性海藻酸。
实施例6
实施例1所述海藻改性pp纺粘无纺布的制备方法，包括以下步骤：
①聚丙烯90kg和改性海藻酸0.2kg加入到卧式双螺带混合机中，加热至40℃，中速混合20分钟，然后向其中加入聚乙二醇1kg，聚乙烯吡咯烷酮0.3kg和抗氧剂0.3kg，加热至180℃，高速混合20分钟，得到混合料液；
其中改性海藻酸按照以下步骤制备得到：
将100kg海藻酸溶于300kgN,N-二甲基甲酰胺中，在10℃条件下加入5kg 1-(3-二甲氨基丙基)-3-乙基碳二亚胺盐酸盐和7kg N-羟基琥珀酰亚胺，搅拌反应10小时后，得到反应液，向反应液中加入1kg己二胺，在40℃下搅拌反应10小时，得到混合液，向混合液中加入300kg去离子水，用分子量3500的透析袋透析得透析液，透析液冻干得改性海藻酸；
所述抗氧剂为抗氧剂3125；
②将步骤①所得混合料液压入纺丝箱体，经喷丝、侧吹风箱体冷却、牵引得纤维网，所得纤维网在热轧机上热轧成布，得到海藻改性pp纺粘无纺布。
实施例7
实施例2所述海藻改性pp纺粘无纺布的制备方法，包括以下步骤：
①聚丙烯100kg和改性海藻酸0.9kg加入到卧式双螺带混合机中，加热至80℃，中速混合40分钟，然后向其中加入聚乙二醇5kg，聚乙烯吡咯烷酮0.1kg和抗氧剂20130.6kg，加热至190℃，高速混合40分钟，得到混合料液；
其中改性海藻酸按照以下步骤制备得到：
将100kg海藻酸溶于600kg二甲基亚砜中，在35℃条件下加入15kg 1-(3-二甲氨基丙基)-3-乙基碳二亚胺盐酸盐和14kg N-羟基琥珀酰亚胺，搅拌反应5小时后，得到反应液，向反应液中加入10kg三(2-氨基乙基)胺，在80℃下搅拌反应24小时，得到混合液，向混合液中加入600kg去离子水，用分子量3500的透析袋透析得透析液，透析液冻干得改性海藻酸；
②将步骤①所得混合料液压入纺丝箱体，经喷丝、侧吹风箱体冷却、牵引得纤维网，所得纤维网在热轧机上热轧成布，得到海藻改性pp纺粘无纺布。
实施例8
实施例3所述海藻改性pp纺粘无纺布的制备方法，包括以下步骤：
①聚丙烯94kg和改性海藻酸1.2kg加入到卧式双螺带混合机中，加热至50℃，中速混合25分钟，然后向其中加入聚乙二醇4kg，聚乙烯吡咯烷酮15kg和抗氧剂0.4kg，加热至182℃，高速混合25分钟，得到混合料液；
其中改性海藻酸按照以下步骤制备得到：
将100kg海藻酸溶于400kg N,N-二甲基甲酰胺中，在25℃条件下加入10kg 1-(3-二甲氨基丙基)-3-乙基碳二亚胺盐酸盐和10kg N-羟基琥珀酰亚胺，搅拌反应4小时后，得到反应液，向反应液中加入5kg己二胺，在50℃下搅拌反应14小时，得到混合液，向混合液中加入400kg去离子水，用分子量3500的透析袋透析得透析液，透析液冻干得改性海藻酸；
所述抗氧剂为抗氧剂3125；
②将步骤①所得混合料液压入纺丝箱体，经喷丝、侧吹风箱体冷却、牵引得纤维网，所得纤维网在热轧机上热轧成布，得到海藻改性pp纺粘无纺布。
实施例9
实施例4所述海藻改性pp纺粘无纺布的制备方法，包括以下步骤：
①聚丙烯95kg和改性海藻酸1.5kg加入到卧式双螺带混合机中，加热至60℃，中速混合30分钟，然后向其中加入聚乙二醇40003kg，聚乙烯吡咯烷酮K300.2kg和抗氧剂0.5kg，加热 至185℃，高速混合30分钟，得到混合料液；
其中改性海藻酸按照以下步骤制备得到：
将100kg海藻酸溶于400kg二甲基亚砜中，在20℃条件下加入8kg 1-(3-二甲氨基丙基)-3-乙基碳二亚胺盐酸盐和10kg N-羟基琥珀酰亚胺，搅拌反应5小时后，得到反应液，向反应液中加入6kg多元胺，在60℃下搅拌反应15小时，得到混合液，向混合液中加入450kg去离子水，用分子量3500的透析袋透析得透析液，透析液冻干得改性海藻酸；
所述抗氧剂为抗氧剂3125；
②将步骤①所得混合料液压入纺丝箱体，经喷丝、侧吹风箱体冷却、牵引得纤维网，所得纤维网在热轧机上热轧成布，得到海藻改性pp纺粘无纺布。
实施例10
实施例5所述海藻改性pp纺粘无纺布的制备方法，包括以下步骤：
①聚丙烯95kg和改性海藻酸1.9kg加入到卧式双螺带混合机中，加热至60℃，中速混合30分钟，然后向其中加入聚乙二醇60003kg，聚乙烯吡咯烷酮K300.2kg和抗氧剂0.5kg，加热至185℃，高速混合30分钟，得到混合料液；
其中改性海藻酸按照以下步骤制备得到：
将100kg海藻酸溶于400kg二甲基亚砜中，在20℃条件下加入8kg 1-(3-二甲氨基丙基)-3-乙基碳二亚胺盐酸盐和10kg N-羟基琥珀酰亚胺，搅拌反应5小时后，得到反应液，向反应液中加入6kg多元胺，在60℃下搅拌反应15小时，得到混合液，向混合液中加入450kg去离子水，用分子量3500的透析袋透析得透析液，透析液冻干得改性海藻酸；
所述抗氧剂为抗氧剂3125；
②将步骤①所得混合料液压入纺丝箱体，经喷丝、侧吹风箱体冷却、牵引得纤维网，所得纤维网在热轧机上热轧成布，得到海藻改性pp纺粘无纺布。
对比例11
采用实施例10的方法，在其他参数不变的情况下，加入的海藻酸盐的量改变为3.5Kg。
对比例12
采用实施例10的方法，在其他参数不变的情况下，加入的海藻酸盐的量改变为4.0Kg。
对比例13
采用实施例10的方法，在其他参数不变的情况下，加入的海藻酸盐的量改变为4.5Kg。
对比例14
采用实施例10的方法，在其他参数不变的情况下，加入的海藻酸盐的量改变为0.09Kg。
对比例15
采用实施例10的方法，在其他参数不变的情况下，加入的海藻酸盐的量改变为0.05Kg。
对实施例6～10基本对比例11-13的海藻改性pp纺粘无纺布进行性能测试，对比例采用同克重的pp纺粘无纺布，克重均为20±0.5g/cm 2，采用ISO9237-1995标准进行材料透气率的测试，采用GB/T 24218.3-2010进行断裂强力和断裂伸长率的测试，结果如表1所示。
表1
Figure PCTCN2020082974-appb-000001
由表1的数据可以看出，本发明的海藻改性pp纺粘无纺布的透气率非常好是常规无纺布制品的100％以上；断裂强度和断裂伸长率均高于常规pp纺粘无纺布的20％左右，可以看出，分子量3500以上的改性海藻酸，结构上的致密互穿网格结构保证了无纺布具有较高的力学强度和耐磨性能。
同时，也可以得出结论，当制备的无纺布中海藻酸盐含量0.1-2％时，制备的纤维的抗菌性最好，且物理性能可以满足生产的需要，而当海藻酸盐含量＜0.1％时，制备的无纺布透气性和抗菌性有明显下降；当海藻酸盐含量≥2％时，制备的无纺布物理指标下降明显，显然不能满足正常生产应用的要求。综合考虑，本发明制备的海藻改性pp纺粘无纺布中海藻酸盐的最佳含量为0.1-2％。
将实施例6～10的海藻改性pp纺粘无纺布进行吸水性测试，对比例采用同克重的pp纺粘无纺布，克重均为20±0.5g/cm 2，测试其吸水速度和吸水量：吸水速度测试方法为将实 施例6～10的海藻改性pp纺粘无纺布剪成10cm*10cm的正方形片状，将1ml水滴在实验台上，并使用片状无纺布慢慢靠近水，用秒表记录无纺布完全吸水即全部润湿的时间进行吸水速度的测试；吸水量测试为将10cm*10cm的正方形片状称重后在水中浸泡10s，拿出后当无纺布不滴水后放在天平上称重，记录无纺布的重量m，每克的吸水量＝(m-5)/5；结果如表2所示。
表2实施例6～10的海藻改性pp纺粘无纺布吸水性测试结果
表2
  吸水速度 吸水量(倍) 公定回潮率(％)
实施例6 2.1 13.2 12.83
实施例7 1.6 12.5 8.59
实施例8 1.7 12.7 9.12
实施例9 1.9 13.0 12.15
实施例10 2.8 14.5 14.33
对比例11 3.1 14.8 14.75
对比例12 3.1 14.4 14.78
对比例13 3.2 14.9 14.83
对比例14 3.0 3.5 3.2
对比例15 3.0 3.6 3.3
注：在进行吸水量的实验时，对比例常规无纺布的表面为不沾水。
表2的结果表明，本发明实施例6～10的海藻改性pp纺粘无纺布吸水速度快，吸水后表面仍保持干爽，并且能吸收其质量12倍以上的水分，公定回潮率0.2-3.5％之间，吸湿性良好，具有很好的亲水性能。
本发明采用的海藻酸市购得到，除了本发明中要求外，其具体指标并无其他额外的要求。
以上所述，仅是本发明的较佳实施例而已，并非是对本发明作其它形式的限制，任何熟悉本专业的技术人员可能利用上述技术内容作为启示加以变更或改型为等同变化的等效实施例。但是凡是未脱离本发明技术方案内容，依据本发明的技术实质对以上实施例所作出的简单修改，等同变化与改型，仍属于本发明权利要求的保护范围。

Claims (10)

  1. 一种海藻改性pp纺粘无纺布，其特征在于：所述PP纺粘无纺布中含有海藻酸盐0.1-2％。
  2. 根据权利要求1所述的一种海藻改性pp纺粘无纺布，其特征在于：所述海藻改性pp纺粘无纺布回潮率0.2-3.5％，抗菌率≥98％。
  3. 根据权利要求1所述的一种海藻改性pp纺粘无纺布，其特征在于：所述海藻酸盐以海藻酸改性而成；所述海藻酸是从天然藻类中提取的，所述海藻酸盐按照以下步骤制备得到：
    将海藻酸溶于溶剂中，在10～35℃条件下加入1-(3-二甲氨基丙基)-3-乙基碳二亚胺盐酸盐和N-羟基琥珀酰亚胺，搅拌反应5～10小时后，得到反应液，向反应液中加入多元胺，在40～80℃下搅拌反应10～24小时，得到混合液，向混合液中加入去离子水，用分子量3500的透析袋透析得透析液，透析液冻干得海藻酸盐；
    所述溶剂是N,N-二甲基甲酰胺或二甲基亚砜；
    所述多元胺是己二胺或三(2-氨基乙基)胺；
    海藻酸、溶剂、1-(3-二甲氨基丙基)-3-乙基碳二亚胺盐酸盐、N-羟基琥珀酰亚胺、多元胺和去离子水的质量比为100：300～600：5～15：7～14：1～10：300～600。
  4. 根据权利要求1所述的一种海藻改性pp纺粘无纺布，其特征在于：所述海藻改性pp纺粘无纺布的制备原料还包括聚乙二醇；所述聚乙二醇是聚乙二醇4000或聚乙二醇6000。
  5. 根据权利要求1所述的一种海藻改性pp纺粘无纺布，其特征在于：所述海藻改性pp纺粘无纺布的制备原料还包括聚乙烯吡咯烷酮；所述聚乙烯吡咯烷酮为聚乙烯吡咯烷酮K30。
  6. 根据权利要求1所述的一种海藻改性pp纺粘无纺布，其特征在于：抗氧剂为抗氧剂3125。
  7. 权利要求1所述海藻改性pp纺粘无纺布，其特征在于：所述海藻改性pp纺粘无纺布包括以下步骤：
    ①按质量比将聚丙烯和占总重量0.1-2％的海藻酸盐加入到卧式双螺带混合机中，加热至40～80℃，中速混合20～40分钟，然后向其中加入聚乙二醇，聚乙烯吡咯烷酮和抗氧剂，加热至180～190℃，高速混合20～40分钟，得到混合料液；
    ②将步骤①所得混合料液压入纺丝箱体，经喷丝、侧吹风箱体冷却、牵引得纤维网，所得纤维网在热轧机上热轧成布，得到海藻改性pp纺粘无纺布。
  8. 根据权利要求7所述海藻改性pp纺粘无纺布，其特征在于：步骤②中纤维网在热轧机上的轧辊温度为140～150℃。
  9. 根据权利要求7所述海藻改性pp纺粘无纺布，其特征在于：步骤②中将熔融体压入纺丝箱体的工作压力为2～5MPa。
  10. 根据权利要求7所述海藻改性pp纺粘无纺布，其特征在于：所述抗氧剂为抗氧剂3125或抗氧剂2013。
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