WO2021037144A1 - 一种无纺棉过滤嘴及其制备方法 - Google Patents

一种无纺棉过滤嘴及其制备方法 Download PDF

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Publication number
WO2021037144A1
WO2021037144A1 PCT/CN2020/111765 CN2020111765W WO2021037144A1 WO 2021037144 A1 WO2021037144 A1 WO 2021037144A1 CN 2020111765 W CN2020111765 W CN 2020111765W WO 2021037144 A1 WO2021037144 A1 WO 2021037144A1
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Prior art keywords
woven cotton
melting point
polylactic acid
cotton filter
tow
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PCT/CN2020/111765
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English (en)
French (fr)
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卢集伟
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深圳市智叶科技有限公司
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Publication of WO2021037144A1 publication Critical patent/WO2021037144A1/zh

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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/0204—Preliminary operations before the filter rod forming process, e.g. crimping, blooming
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/0229—Filter rod forming processes
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/08—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent
    • A24D3/10—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent of cellulose or cellulose derivatives

Definitions

  • the application relates to the field of cigarette filtering, in particular to a non-woven cotton filter tip and a preparation method thereof.
  • the existing traditional electronic cigarettes cause the smoke to move extremely fast due to smoking, and it is inevitable that the trace oily microbeads will move with the smoke, and as the number of smoking increases, the smoking part accumulates oily matter. , Which greatly destroys the taste experience and increases the psychological burden; the same small amount of water vapor will condense into microbeads on the airway wall.
  • the oily droplets with high temperature meet a small amount of water, there will be a slight frying sound , In severe cases, oil droplets will directly blow up the inlet cavity, causing safety hazards.
  • polylactic acid fiber tow is significantly better than polypropylene fiber and slightly inferior to cellulose acetate fiber, but it has good adsorption and absorption capacity for aromatic and non-polar substances represented by toluene. Obviously better than cellulose acetate fiber.
  • the polylactic acid fiber tow can be completely applied to the filter material of tobacco, and polylactic acid is recognized as a green and environmentally friendly biodegradable material with higher safety.
  • the purpose of this application is to provide a non-woven cotton filter and a preparation method thereof to solve the above-mentioned problems in the background art.
  • a non-woven cotton filter comprises a weight ratio of 80%-95% high melting point polylactic acid and a weight ratio of 5%-20% low melting point polylactic acid composition.
  • a method for preparing a non-woven cotton filter tip includes the following steps:
  • the high melting point polylactic acid is vacuum dried at 80-100°C for 10-12 hours, and the low melting point polylactic acid is vacuum dried at 45-55°C for 12-15 hours;
  • step S2 The high melting point polylactic acid processed in step S1 is subjected to melt spinning, drawing, and crimping processes to prepare tow 1, and the low melting point polylactic acid processed in step S1 is subjected to melt spinning, drawing, and crimping processes Prepare tow two;
  • step S3 The tow 1 and the tow 2 prepared in step S2 are opened and cut into short filaments according to a certain weight percentage, and mixed, and then oriented or randomly arranged to form a fiber network structure, and use thermal bonding to form a cylindrical strip Non-woven cotton and/or sheet-shaped non-woven cotton;
  • step S4 The non-woven cotton prepared in step S3 is packaged in roll paper to prepare a non-woven cotton filter.
  • the melt index of the high melting point polylactic acid is 5-30g/10min (210°C, 2.16kg), and the melting point is 160-200°C
  • the melt index of the low melting point polylactic acid is 5-30g/10min (210°C, 2.16kg), the melting point is 120-155°C.
  • the preparation shape of the non-woven cotton is cylindrical strip-shaped non-woven cotton or sheet-shaped non-woven cotton.
  • the diameter D of the cylindrical strip-shaped non-woven cotton is 5-12 mm, and the thickness L of the sheet-shaped non-woven cotton is 5-12 mm.
  • the density of the non-woven cotton in the step S3 is 0.3 g/cm 3 -0.7 g/cm 3 .
  • the specification of the first tow monofilament is 1-8 dtex
  • the specification of the second tow monofilament is 1-8 dtex
  • the filter used in the technical solution of the present application can completely isolate the oily substance from contacting the oral cavity, block the fried oil from entering the oral cavity, and adjust the size of the pores in the fiber network structure of the non-woven cotton can effectively intercept harmful substances in the smoke and adjust the suction resistance. It can restore the smoking sensation of traditional cigarettes.
  • the filter adopts a completely biodegradable polylactic acid material, which is non-toxic, harmless, green and environmentally friendly.
  • the non-woven process is simple and convenient, which is conducive to the operability of product performance and product diversity.
  • Figure 1 is a schematic diagram of a cylindrical filter tip
  • Figure 2 is a schematic diagram of a hollow cylindrical filter.
  • a non-woven cotton filter tip comprises 95% by weight high melting point polylactic acid and 5% by weight low melting point polylactic acid.
  • a method for preparing a non-woven cotton filter tip includes the following steps:
  • the high melting point polylactic acid is vacuum dried at 80°C for 10 hours, and the low melting point polylactic acid is vacuum dried at 45°C for 12 hours.
  • the melt index of the high melting point polylactic acid is 5g/10min (210°C, 2.16kg) , Melting point is 160°C, low melting point polylactic acid melt index is 5g/10min (210°C, 2.16kg), melting point is 120°C;
  • step S2 The high-melting-point polylactic acid processed in step S1 is melt-spinned, drawn, and crimped to prepare a tow with a monofilament specification of 1dtex, and the low-melting-point polylactic acid processed in step S1 is melt-spinned , Drafting and crimping process to prepare tow 2 with a monofilament specification of 1dtex;
  • step S3 The tow 1 and the tow 2 prepared in step S2 are opened and cut into short filaments according to a certain weight percentage, and mixed, and then oriented or randomly arranged to form a fiber network structure, and use thermal bonding to form a cylindrical strip Non-woven cotton, and the tow 1 and tow 2 obtained in step S2 are opened and cut into short filaments according to a certain weight percentage, and then mixed, and then oriented or randomly arranged to form a fiber network structure.
  • Connected to form sheet-shaped non-woven cotton wherein the diameter D of the cylindrical strip-shaped non-woven cotton is 5 mm, the thickness L of the sheet-shaped non-woven cotton is 5 mm, and the density of the non-woven cotton is 0.3 g/cm 3 ;
  • step S4 The non-woven cotton prepared in step S3 is wrapped in a paper roll to obtain a non-woven cotton filter.
  • a non-woven cotton filter tip comprises 90% by weight high melting point polylactic acid and 10% by weight low melting point polylactic acid.
  • a method for preparing a non-woven cotton filter tip includes the following steps:
  • the high melting point polylactic acid was vacuum dried at 90°C for 11 hours, and the low melting point polylactic acid was vacuum dried at 48°C for 13 hours.
  • the melt index of the high melting point polylactic acid was 10g/10min (210°C, 2.16kg) , Melting point is 170°C, low melting point polylactic acid melt index is 10g/10min (210°C, 2.16kg), melting point is 130°C;
  • step S2 The high-melting-point polylactic acid treated in step S1 is melt-spinned, drawn, and crimped to prepare a tow with a monofilament specification of 2dtex, and the low-melting-point polylactic acid treated in step S1 is melt-spinned , Drafting and crimping process to prepare tow 2 with a monofilament specification of 2dtex;
  • step S3 The tow 1 and the tow 2 prepared in step S2 are opened and cut into short filaments according to a certain weight percentage, and mixed, and then oriented or randomly arranged to form a fiber network structure, and use thermal bonding to form a cylindrical strip
  • the tow 1 and the tow 2 obtained in step S2 are opened and cut into short filaments according to a certain weight percentage, and then mixed, and then oriented or randomly arranged to form a fiber network structure, using thermal bonding
  • a sheet-shaped non-woven cotton is formed, wherein the diameter D of the cylindrical strip-shaped non-woven cotton is 8 mm, the thickness L of the sheet-shaped non-woven cotton is 8 mm, and the density of the non-woven cotton is 0.4 g/cm 3 ;
  • step S4 The non-woven cotton prepared in step S3 is wrapped in a paper roll to obtain a non-woven cotton filter.
  • a non-woven cotton filter tip comprises 85% by weight high melting point polylactic acid and 15% by weight low melting point polylactic acid.
  • a method for preparing a non-woven cotton filter tip includes the following steps:
  • the high melting point polylactic acid is vacuum dried at 95°C for 10 hours, and the low melting point polylactic acid is vacuum dried at 50°C for 13 hours.
  • the melt index of the high melting point polylactic acid is 15g/10min (210°C, 2.16kg) , Melting point is 180°C, low melting point polylactic acid melt index is 15g/10min (210°C, 2.16kg), melting point is 135°C;
  • step S2 The high-melting-point polylactic acid processed in step S1 is melt-spinned, drawn, and crimped to prepare a tow with a monofilament specification of 4dtex, and the low-melting-point polylactic acid processed in step S1 is melt-spun , Drafting and crimping process to prepare tow 2 with a monofilament specification of 4dtex;
  • step S3 The tow 1 and the tow 2 prepared in step S2 are opened and cut into short filaments according to a certain weight percentage, and mixed, and then oriented or randomly arranged to form a fiber network structure, and use thermal bonding to form a cylindrical strip
  • the tow 1 and the tow 2 obtained in step S2 are opened and cut into short filaments according to a certain weight percentage, and then mixed, and then oriented or randomly arranged to form a fiber network structure, using thermal bonding
  • a sheet-shaped non-woven cotton is formed, wherein the diameter D of the cylindrical strip-shaped non-woven cotton is 8 mm, the thickness L of the sheet-shaped non-woven cotton is 8 mm, and the density of the non-woven cotton is 0.6 g/cm 3 ;
  • step S4 The non-woven cotton prepared in step S3 is wrapped in a paper roll to obtain a non-woven cotton filter.
  • a non-woven cotton filter tip comprises a high melting point polylactic acid with a weight ratio of 82% and a low melting point polylactic acid with a weight ratio of 18%.
  • a method for preparing a non-woven cotton filter tip includes the following steps:
  • the high melting point polylactic acid is vacuum dried at 95°C for 12 hours, and the low melting point polylactic acid is vacuum dried at 45°C for 15 hours.
  • the melt index of the high melting point polylactic acid is 25g/10min (210°C, 2.16kg) , Melting point is 180°C, low melting point polylactic acid melt index is 25g/10min (210°C, 2.16kg), melting point is 150°C;
  • step S2 The high-melting-point polylactic acid processed in step S1 is melt-spinning, drawing, and crimping to prepare a tow with a monofilament specification of 6dtex, and the low-melting-point polylactic acid processed in step S1 is melt-spinned , Drafting and crimping process to prepare tow 2 with a monofilament specification of 6dtex;
  • step S3 The tow 1 and the tow 2 prepared in step S2 are opened and cut into short filaments according to a certain weight percentage, and mixed, and then oriented or randomly arranged to form a fiber network structure, and use thermal bonding to form a cylindrical strip
  • the tow 1 and the tow 2 obtained in step S2 are opened and cut into short filaments according to a certain weight percentage, and then mixed, and then oriented or randomly arranged to form a fiber network structure, using thermal bonding
  • a sheet-shaped non-woven cotton is formed, wherein the diameter D of the cylindrical strip-shaped non-woven cotton is 11 mm, the thickness L of the sheet-shaped non-woven cotton is 11 mm, and the density of the non-woven cotton is 0.6 g/cm 3 ;
  • step S4 The non-woven cotton prepared in step S3 is wrapped in a paper roll to obtain a non-woven cotton filter.
  • a non-woven cotton filter tip comprises 95% by weight high melting point polylactic acid and 5% by weight low melting point polylactic acid.
  • a method for preparing a non-woven cotton filter tip includes the following steps:
  • the high melting point polylactic acid is vacuum dried at 100°C for 12 hours, and the low melting point polylactic acid is vacuum dried at 55°C for 15 hours.
  • the melt index of the high melting point polylactic acid is 30g/10min (210°C, 2.16kg) , Melting point is 200°C, low melting point polylactic acid melt index is 30g/10min (210°C, 2.16kg), melting point is 155°C;
  • step S2 The high-melting-point polylactic acid processed in step S1 is melt-spinned, drawn, and crimped to prepare a tow with a monofilament specification of 8dtex, and the low-melting-point polylactic acid processed in step S1 is melt-spinned , Drafting and crimping process to prepare tow 2 with a monofilament specification of 8dtex;
  • step S3 The tow 1 and the tow 2 prepared in step S2 are opened and cut into short filaments according to a certain weight percentage, and mixed, and then oriented or randomly arranged to form a fiber network structure, and use thermal bonding to form a cylindrical strip
  • the tow 1 and the tow 2 obtained in step S2 are opened and cut into short filaments according to a certain weight percentage, and then mixed, and then oriented or randomly arranged to form a fiber network structure, using thermal bonding
  • a sheet-shaped non-woven cotton is formed, wherein the diameter D of the cylindrical strip-shaped non-woven cotton is 12 mm, the thickness L of the sheet-shaped non-woven cotton is 12 mm, and the density of the non-woven cotton is 0.7 g/cm 3 ;
  • step S4 The non-woven cotton prepared in step S3 is wrapped in a paper roll to obtain a non-woven cotton filter.

Abstract

一种无纺棉过滤嘴及其制备方法，该无纺棉过滤嘴的制备方法包括以下步骤：将高熔点聚乳酸抽真空干燥，将低熔点聚乳酸抽真空干燥，将高熔点聚乳酸经过熔融纺丝、牵伸、卷曲工艺制备出丝束一，将低熔点聚乳酸经过熔融纺丝、牵伸、卷曲工艺制备出丝束二，将丝束一和二开松切为短丝进行混合，再进行定向或随机撑列，形成纤维网状结构，利用热粘接形成无纺棉，对无纺棉进行卷纸包装，制得无纺棉过滤嘴。

Description

一种无纺棉过滤嘴及其制备方法
相关申请的交叉引用
本申请要求于2019年8月28日提交中国专利局、申请号为201910801502.7、申请名称为“一种无纺棉过滤嘴及其制备方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及香烟过滤领域，具体是一种无纺棉过滤嘴及其制备方法。
 背景技术
传统的烟草产品在烟草燃烧过程中产生大量的烟焦油、不充分燃烧物等几百种对人体有毒有害的物质，进一步加大了对人体健康的损害。为了降低烟草对广大烟民消费者的健康损害，烟草行业也在不断的推陈出新，推出了各种香烟产品，如细支烟、超细支烟、传统电子烟、低温不燃烧烟等等，传统电子烟是从烟草中提取相应物质，辅助以其他的辅料配制成烟油，通过极速加热雾化技术形成烟雾来满足消费者的体验。
针对现有技术进行改进，现有的传统电子烟由于吸食导致烟气的移动速度极快，无法避免的导致微量油状微珠会随着烟气移动，随着吸食次数的增加吸食部位集聚油状物，极大的破坏了口感体验且增加了心理负担；同是少量水汽也会在气道壁上凝结成微珠，当温度高的油状微滴遇到微量的水，会有轻微的油炸声，严重时会油滴会直接炸进口腔，带来安全隐患。
据研究表明，聚乳酸纤维丝束的过滤吸附效果明显优于聚丙烯纤维，略逊于醋酸纤维素纤维，但对以甲苯为代表的芳香和非极性物质具有很好的吸附吸收能力，而且明显优于醋酸纤维素纤维，理论上聚乳酸纤维丝束完全可应用于烟草的过滤材料，而且聚乳酸是公认的绿色环保可生物降解材料，具有更高的安全性。
 技术解决方案
本申请的目的在于提供一种无纺棉过滤嘴及其制备方法，以解决上述背景技术中提出的问题。
为实现上述目的，本申请提供如下技术方案：
一种无纺棉过滤嘴，所述无纺棉过滤嘴包括重量比为80%-95%的高熔点聚乳酸和重量比为5%-20%的低熔点聚乳酸组成。
一种无纺棉过滤嘴的制备方法，所述无纺棉过滤嘴的制备方法包括以下步骤：
S1：将高熔点聚乳酸在80-100℃下抽真空干燥10-12h，将低熔点聚乳酸在45-55℃下抽真空干燥12-15h；
S2：将经步骤S1处理后的高熔点聚乳酸经过熔融纺丝、牵伸、卷曲工艺制备出丝束一，将经步骤S1处理后的低熔点聚乳酸经过熔融纺丝、牵伸、卷曲工艺制备出丝束二；
S3：将步骤S2制得的丝束一和丝束二按照一定的重量百分比开松切为短丝进行混合，再进行定向或者随机撑列，形成纤维网状结构，利用热粘接形成圆柱条状无纺棉和/或片状无纺棉；
S4：对步骤S3中制备的无纺棉进行卷纸包装，制得无纺棉过滤嘴。
在一实施例中：所述高熔点聚乳酸的熔融指数为5-30g/10min（210℃、2.16kg），熔点为160-200℃；所述低熔点聚乳酸熔融指数为5-30g/10min（210℃、2.16kg），熔点为120-155℃。
在一实施例中：所述无纺棉的制备形状为圆柱条状无妨棉或片状无纺棉。
在一实施例中：所述圆柱条状无纺棉的直径D为5-12mm，所述片状无纺棉的厚度L为5-12mm。
在一实施例中：所述步骤S3中无纺棉密度为0.3g/cm 3-0.7g/cm 3。
在一实施例中：所述丝束一单丝规格为1-8dtex，所述丝束二单丝规格为1-8dtex。
与现有技术相比，本申请的有益效果是：
本申请技术方案采用的过滤嘴可以完全隔绝油状物与口腔的接触，阻挡炸油进入口腔，调节无纺棉的纤维网状结构中的孔隙大小可有效截留烟气中的有害物质和调整吸阻，并可还原吸食传统卷烟的吸食感觉，过滤嘴采用可完全生物降解的聚乳酸材料，无毒无害，绿色环保，无纺布工艺简单便捷，利于产品性能的可操作性和产品的多样性。
 附图说明
图1为圆柱形过滤嘴的示意图；
图2为中空圆柱形过滤嘴的示意图。
 本发明的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
实施例一：
一种无纺棉过滤嘴，无纺棉过滤嘴包括重量比为95%的高熔点聚乳酸和重量比为5%的低熔点聚乳酸组成。
一种无纺棉过滤嘴的制备方法，无纺棉过滤嘴的制备方法包括以下步骤：
S1：将高熔点聚乳酸在80℃下抽真空干燥10h，将低熔点聚乳酸在45℃下抽真空干燥12h，其中，高熔点聚乳酸的熔融指数为5g/10min（210℃、2.16kg），熔点为160℃，低熔点聚乳酸熔融指数为5g/10min（210℃、2.16kg），熔点为120℃；
S2：将经步骤S1处理后的高熔点聚乳酸经过熔融纺丝、牵伸、卷曲工艺制备出单丝规格为1dtex的丝束一，将经步骤S1处理后的低熔点聚乳酸经过熔融纺丝、牵伸、卷曲工艺制备出单丝规格为1dtex的丝束二；
S3：将步骤S2制得的丝束一和丝束二按照一定的重量百分比开松切为短丝进行混合，再进行定向或者随机撑列，形成纤维网状结构，利用热粘接形成圆柱条状无纺棉，以及将步骤S2制得的丝束一和丝束二按照一定的重量百分比开松切为短丝进行混合，再进行定向或者随机撑列，形成纤维网状结构，利用热粘接形成片状无纺棉，其中，圆柱条状无纺棉的直径D为5mm，片状无纺棉的厚度L为5mm，且无纺棉密度为0.3g/cm 3；
S4：对步骤S3中制备的无纺棉进行卷纸包装即可制得无纺棉过滤嘴。
实施例二：
一种无纺棉过滤嘴，无纺棉过滤嘴包括重量比为90%的高熔点聚乳酸和重量比为10%的低熔点聚乳酸组成。
一种无纺棉过滤嘴的制备方法，无纺棉过滤嘴的制备方法包括以下步骤：
S1：将高熔点聚乳酸在90℃下抽真空干燥11h，将低熔点聚乳酸在48℃下抽真空干燥13h，其中，高熔点聚乳酸的熔融指数为10g/10min（210℃、2.16kg），熔点为170℃，低熔点聚乳酸熔融指数为10g/10min（210℃、2.16kg），熔点为130℃；
S2：将经步骤S1处理后的高熔点聚乳酸经过熔融纺丝、牵伸、卷曲工艺制备出单丝规格为2dtex的丝束一，将经步骤S1处理后的低熔点聚乳酸经过熔融纺丝、牵伸、卷曲工艺制备出单丝规格为2dtex的丝束二；
S3：将步骤S2制得的丝束一和丝束二按照一定的重量百分比开松切为短丝进行混合，再进行定向或者随机撑列，形成纤维网状结构，利用热粘接形成圆柱条状无纺棉，将步骤S2制得的丝束一和丝束二按照一定的重量百分比开松切为短丝进行混合，再进行定向或者随机撑列，形成纤维网状结构，利用热粘接形成片状无纺棉，其中，圆柱条状无纺棉的直径D为8mm，片状无纺棉的厚度L为8mm，且无纺棉密度为0.4g/cm 3；
S4：对步骤S3中制备的无纺棉进行卷纸包装即可制得无纺棉过滤嘴。
实施例三：
一种无纺棉过滤嘴，无纺棉过滤嘴包括重量比为85%的高熔点聚乳酸和重量比为15%的低熔点聚乳酸组成。
一种无纺棉过滤嘴的制备方法，无纺棉过滤嘴的制备方法包括以下步骤：
S1：将高熔点聚乳酸在95℃下抽真空干燥10h，将低熔点聚乳酸在50℃下抽真空干燥13h，其中，高熔点聚乳酸的熔融指数为15g/10min（210℃、2.16kg），熔点为180℃，低熔点聚乳酸熔融指数为15g/10min（210℃、2.16kg），熔点为135℃；
S2：将经步骤S1处理后的高熔点聚乳酸经过熔融纺丝、牵伸、卷曲工艺制备出单丝规格为4dtex的丝束一，将经步骤S1处理后的低熔点聚乳酸经过熔融纺丝、牵伸、卷曲工艺制备出单丝规格为4dtex的丝束二；
S3：将步骤S2制得的丝束一和丝束二按照一定的重量百分比开松切为短丝进行混合，再进行定向或者随机撑列，形成纤维网状结构，利用热粘接形成圆柱条状无纺棉，将步骤S2制得的丝束一和丝束二按照一定的重量百分比开松切为短丝进行混合，再进行定向或者随机撑列，形成纤维网状结构，利用热粘接形成片状无纺棉，其中，圆柱条状无纺棉的直径D为8mm，片状无纺棉的厚度L为8mm，且无纺棉密度为0.6g/cm 3；
S4：对步骤S3中制备的无纺棉进行卷纸包装即可制得无纺棉过滤嘴。
实施例四：
一种无纺棉过滤嘴，无纺棉过滤嘴包括重量比为82%的高熔点聚乳酸和重量比为18%的低熔点聚乳酸组成。
一种无纺棉过滤嘴的制备方法，无纺棉过滤嘴的制备方法包括以下步骤：
S1：将高熔点聚乳酸在95℃下抽真空干燥12h，将低熔点聚乳酸在45℃下抽真空干燥15h，其中，高熔点聚乳酸的熔融指数为25g/10min（210℃、2.16kg），熔点为180℃，低熔点聚乳酸熔融指数为25g/10min（210℃、2.16kg），熔点为150℃；
S2：将经步骤S1处理后的高熔点聚乳酸经过熔融纺丝、牵伸、卷曲工艺制备出单丝规格为6dtex的丝束一，将经步骤S1处理后的低熔点聚乳酸经过熔融纺丝、牵伸、卷曲工艺制备出单丝规格为6dtex的丝束二；
S3：将步骤S2制得的丝束一和丝束二按照一定的重量百分比开松切为短丝进行混合，再进行定向或者随机撑列，形成纤维网状结构，利用热粘接形成圆柱条状无纺棉，将步骤S2制得的丝束一和丝束二按照一定的重量百分比开松切为短丝进行混合，再进行定向或者随机撑列，形成纤维网状结构，利用热粘接形成片状无纺棉，其中，圆柱条状无纺棉的直径D为11mm，片状无纺棉的厚度L为11mm，且无纺棉密度为0.6g/cm 3；
S4：对步骤S3中制备的无纺棉进行卷纸包装即可制得无纺棉过滤嘴。
实施例五：
一种无纺棉过滤嘴，无纺棉过滤嘴包括重量比为95%的高熔点聚乳酸和重量比为5%的低熔点聚乳酸组成。
一种无纺棉过滤嘴的制备方法，无纺棉过滤嘴的制备方法包括以下步骤：
S1：将高熔点聚乳酸在100℃下抽真空干燥12h，将低熔点聚乳酸在55℃下抽真空干燥15h，其中，高熔点聚乳酸的熔融指数为30g/10min（210℃、2.16kg），熔点为200℃，低熔点聚乳酸熔融指数为30g/10min（210℃、2.16kg），熔点为155℃；
S2：将经步骤S1处理后的高熔点聚乳酸经过熔融纺丝、牵伸、卷曲工艺制备出单丝规格为8dtex的丝束一，将经步骤S1处理后的低熔点聚乳酸经过熔融纺丝、牵伸、卷曲工艺制备出单丝规格为8dtex的丝束二；
S3：将步骤S2制得的丝束一和丝束二按照一定的重量百分比开松切为短丝进行混合，再进行定向或者随机撑列，形成纤维网状结构，利用热粘接形成圆柱条状无纺棉，将步骤S2制得的丝束一和丝束二按照一定的重量百分比开松切为短丝进行混合，再进行定向或者随机撑列，形成纤维网状结构，利用热粘接形成片状无纺棉，其中，圆柱条状无纺棉的直径D为12mm，片状无纺棉的厚度L为12mm，且无纺棉密度为0.7g/cm 3；
S4：对步骤S3中制备的无纺棉进行卷纸包装即可制得无纺棉过滤嘴。
尽管参照前述实施例对本申请进行了详细的说明，对于本领域的技术人员来说，其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换，凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (8)

  1. 一种无纺棉过滤嘴，其中：所述无纺棉过滤嘴包括重量比为80%-95%的高熔点聚乳酸和重量比为5%-20%的低熔点聚乳酸组成。
  2. 一种无纺棉过滤嘴的制备方法，其中：所述无纺棉过滤嘴的制备方法包括以下步骤：
    S1：将高熔点聚乳酸在80-100℃下抽真空干燥10-12h，将低熔点聚乳酸在45-55℃下抽真空干燥12-15h；
    S2：将经步骤S1处理后的高熔点聚乳酸经过熔融纺丝、牵伸、卷曲工艺制备出丝束一，将经步骤S1处理后的低熔点聚乳酸经过熔融纺丝、牵伸、卷曲工艺制备出丝束二；
    S3：将步骤S2制得的丝束一和丝束二按照一定的重量百分比开松切为短丝进行混合，再进行定向或者随机撑列，形成纤维网状结构，利用热粘接形成圆柱条状无纺棉和/或片状无纺棉；
    S4：对步骤S3中制备的无纺棉进行卷纸包装，制得无纺棉过滤嘴。
  3. 根据权利要求2所述的一种无纺棉过滤嘴的制备方法，其中：所述高熔点聚乳酸的熔融指数为5-30g/10min，熔点为160-200℃。
  4. 根据权利要求2所述的一种无纺棉过滤嘴的制备方法，其中：所述低熔点聚乳酸熔融指数为5-30g/10min，熔点为120-155℃。
  5. 根据权利要求2所述的一种无纺棉过滤嘴的制备方法，其中：所述圆柱条状无纺棉的直径D为5-12mm。
  6. 根据权利要求2所述的一种无纺棉过滤嘴的制备方法，其中：所述片状无纺棉的厚度L为5-12mm。
  7. 根据权利要求2所述的一种无纺棉过滤嘴的制备方法，其中：所述步骤S3中无纺棉密度为0.3g/cm3-0.7g/cm 3。
  8. 根据权利要求2所述的一种无纺棉过滤嘴的制备方法，其中：所述丝束一单丝规格为1-8dtex，所述丝束二单丝规格为1-8dtex。
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