WO2024060499A1 - 一种分组加工的聚乳酸纤维滤棒及其制备方法 - Google Patents

一种分组加工的聚乳酸纤维滤棒及其制备方法 Download PDF

Info

Publication number
WO2024060499A1
WO2024060499A1 PCT/CN2023/076384 CN2023076384W WO2024060499A1 WO 2024060499 A1 WO2024060499 A1 WO 2024060499A1 CN 2023076384 W CN2023076384 W CN 2023076384W WO 2024060499 A1 WO2024060499 A1 WO 2024060499A1
Authority
WO
WIPO (PCT)
Prior art keywords
polylactic acid
acid fiber
raw material
component raw
inner core
Prior art date
Application number
PCT/CN2023/076384
Other languages
English (en)
French (fr)
Inventor
岳保山
詹建波
王涛
谢姣
王旭
郑晗
王浩
余耀
余婷婷
程量
丁卫
Original Assignee
云南中烟工业有限责任公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 云南中烟工业有限责任公司 filed Critical 云南中烟工业有限责任公司
Publication of WO2024060499A1 publication Critical patent/WO2024060499A1/zh

Links

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
    • 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 present invention relates to the technical field of cigarette preparation.
  • the present invention relates to a group-processed polylactic acid fiber filter rod and a preparation method thereof.
  • Polylactic acid is produced from lactic acid by fermentation of starch from renewable plant resources, and then prepared into polymer materials through chemical synthesis. It has good recyclability and biodegradability, and has the following characteristics: 1. Using renewable plant resources (corn, wheat, sugar beets, rice, potatoes, potatoes, etc.) and organic waste (corn cobs or roots, stems, leaves, skins, etc. of other crops) as raw materials, we get rid of the need for wood and petroleum resources. 2. It can be completely biodegraded and will naturally decompose into water and carbon dioxide after a certain period of time in the natural environment, without causing environmental pollution.
  • renewable plant resources corn, wheat, sugar beets, rice, potatoes, potatoes, etc.
  • organic waste corn cobs or roots, stems, leaves, skins, etc. of other crops
  • the generated carbon dioxide can be reused through plant photosynthesis and become a
  • the eternal, closed carbon cycle system is a veritable "green material"; 3. Compared with the three major synthetic fibers of polyester, nylon, and acrylic fiber, the energy consumption of producing polylactic acid fiber is low, and it is a relatively low resource and environmental load Polymer material; 4. It has good processing performance and can use the melt spinning method of general thermoplastic resin to produce tows.
  • polylactic acid fiber has been developed for use in tobacco tow and other fields.
  • polylactic acid for clothing The fiber must meet the requirements for fiber spinning, weaving, fabric printing and dyeing, washing, and ironing. It must have high crystallinity, orientation, and mechanical strength. It must be able to withstand temperatures of 80 to 100°C. It must not be soluble in detergent aqueous solutions and dry cleaning solvents. Dissolution and non-swelling require a certain degree of hygroscopicity, and at the same time, the less adsorption of other gaseous substances in the surrounding environment, the better.
  • the filter rod rolled from it is non-toxic, tasteless and safe; (2) The tow has good stability and can meet the needs of filter rod forming equipment and Process requirements; (3) It has appropriate rigidity and curling properties, so that it has good elasticity and looseness. With a small amount of tow filling, by adding plasticizer or adhesive, the filter rod can It meets certain hardness, suction resistance and appearance quality requirements, and has a high rod extraction rate; (4) It has sufficient heat resistance, and the filter tip does not collapse or deform during cigarette smoking; (5) It is harmful to smoke The ingredients have high filtration efficiency; (6) It does not affect the sensory quality of cigarettes. Therefore, special spinning and post-processing technology must be developed to meet the requirements for cigarette use.
  • Chinese patent invention patent CN103074716A relates to a sheath-core type polylactic acid cigarette tow and filter rod and its preparation method.
  • a single fiber in the tow is a sheath-core structure composed of an inner core and an outer skin.
  • the skin layer and the core layer The main resin is polylactic acid.
  • the weight ratio of the skin layer resin to the core layer resin is 20:80 ⁇ 40:60.
  • the crystallinity of the tow skin layer and core layer are 3-25% and 25-60% respectively.
  • the melting points of the skin layer and core layer are 120-150oC and 150-175oC respectively.
  • the above invention combines the advantages of both the core layer and the skin layer.
  • the core layer provides higher physical and mechanical properties and heat resistance, and the skin layer provides good bondability.
  • Filter rods can be easily molded using common plasticizers such as triacetin.
  • the core and skin layers of the sheath-core polylactic acid tow provided by the above invention have good biodegradability
  • the above-mentioned filter rod preparation structure still has the following problems: both the skin layer resin and the core layer resin are compositely spun from a variety of raw materials, and there is no control over the properties of the polylactic acid raw materials.
  • the large difference makes the above-mentioned sheath-core polylactic acid tow processing process unstable.
  • the object of the present invention is to provide a group-processed polylactic acid fiber filter rod, which is simple to set up and strictly controls the properties of the polylactic acid raw materials, so that all outer skins have uniform crystallinity and all inner cores also have uniform crystallinity. degree, and the nodes are evenly distributed when the tow is crystallized, and the polylactic acid fiber filter rod produced has a gradual degree of crystallinity on the inside and outside, making the processing process more stable.
  • a group-processed polylactic acid fiber filter rod comprises an inner core and an outer skin arranged on the outside of the inner core, wherein the inner core and the outer skin are both composited from a plurality of polylactic acid fiber bundles, the polylactic acid fiber bundles in the inner core are prepared from a first component raw material, and the polylactic acid fiber bundles in the outer skin are prepared from a second component raw material, the content of L-lactic acid monomers in the first component raw material is higher than that in the second component raw material, and a dispersant is added to the first component raw material, and triacetin is added to the second component raw material; the polylactic acid fiber bundles in the inner core are made by drawing stress-induced crystallization to improve the crystallinity of the polylactic acid fiber bundles in the inner core.
  • the ratio of the number of polylactic acid fiber tows in the inner core and outer skin ranges from 30:70 to 35:65.
  • nucleating agents are added to both the first component raw material and the second component raw material, and the content of nucleating agent in the first component raw material is not lower than the content of nucleating agent in the second component raw material.
  • a transition layer is provided between the inner core and the outer skin, and the transition layer is composited by a plurality of polylactic acid fiber bundles, and the content of L-lactic acid monomer in the component raw materials used in the polylactic acid fiber bundles in the transition layer is not higher than the content of L-lactic acid monomer in the first component raw material and not lower than the content of L-lactic acid monomer in the second component raw material.
  • the number of the transition layers is at least two, and the polylactic acid fiber tows of the transition layers close to the inner core are made of component raw materials with a L-lactic acid monomer content not less than that of the transition layers close to the inner core.
  • a nucleating agent is added to the component raw materials used for the polylactic acid fiber tows of the transition layer, and the content of the nucleating agent in this component raw material is not higher than that in the first component raw material.
  • the nucleating agent content is not less than the nucleating agent content in the second component raw material.
  • a fiber acetate tow layer is provided on the outside of the outer skin.
  • the invention also provides a method for preparing grouped polylactic acid fiber filter rods, which includes the following steps:
  • S1 Obtain polylactic acid with a L-isomer content at a first predetermined value, add a dispersant to obtain the first component raw material, and induce crystallization through drafting stress during spinning of the first component raw material to obtain the first polylactic acid fiber tow. ;
  • S2 Obtain polylactic acid with a L-isomer content at a second predetermined value, add triacetin to obtain a second component raw material, and spin the second component raw material into a second polylactic acid fiber tow; the second predetermined value The value is lower than the first predetermined value;
  • S3 Compound a plurality of first polylactic acid fiber tows to form an inner core, composite a plurality of second polylactic acid fiber tows to form an outer skin, and wrap the outer skin around the outside of the inner core to form Sheath-core type polylactide fiber filter rod.
  • step S3 polylactic acid with a L-isomer content at a third predetermined value is obtained to obtain a third polylactic acid fiber tow, and multiple third polylactic acid fiber tows are compounded to form a transition layer;
  • the transition layer is wrapped around the inner core, and then the outer skin is wrapped around the transition layer.
  • the outer skin is covered with a fiber acetate tow layer.
  • the beneficial effects of a group-processed polylactic acid fiber filter rod and its preparation method of the present invention are: simple setup, strict control of the properties of polylactic acid raw materials, so that all outer skins have uniform crystallinity, and all inner cores also have It has uniform crystallinity, and the nodes are evenly distributed when the tow is crystallized, and the polylactic acid fiber filter rod produced has a gradual degree of crystallinity on the inside and outside, making the processing process more stable.
  • Figure 1 is a cross-sectional schematic diagram of an embodiment of a group-processed polylactic acid fiber filter rod of the present invention
  • Figure 2 is a schematic flow chart of a method for preparing group-processed polylactic acid fiber filter rods according to the present invention
  • Embodiment 1 As shown in Figure 1, a polylactic acid fiber filter rod processed in groups includes an inner core 1 and an outer skin 2 arranged outside the inner core 1. The inner core 1 and the outer skin 2 are arranged outside the inner core 1. Each layer of skin 2 is composed of several polylactic acid fiber tows. The polylactic acid fiber tows in the inner layer core 1 are prepared from the first component of raw materials.
  • the polylactic acid fiber in the outer layer of skin 2 The tow is prepared from a second component raw material, the L-lactic acid monomer content in the first component raw material is higher than the L-lactic acid monomer content in the second component raw material, and the first component A dispersant is added to the raw material, and triacetin is added to the second component raw material; the polylactic acid fiber tows in the inner layer core 1 are made by drafting stress-induced crystallization to improve the inner layer. Crystallinity of polylactic acid fiber tow in core 1.
  • a polylactic acid with a L-isomer content at a first predetermined value is obtained, a dispersant is added to obtain a first component raw material, and the first component raw material is induced to crystallize by drafting stress during spinning to obtain the first polylactic acid.
  • the fiber tow makes the first polylactic acid fiber tow have a higher crystallinity, providing higher physical and mechanical properties and heat resistance; adding a dispersant can make it difficult to form in the first polylactic acid fiber tow with high crystallinity. Large knots for easy cutting.
  • the first predetermined value ranges from 95% to 98%, that is, the first component raw material contains 95% to 98% of the L-isomer (ie, L-lactic acid monomer).
  • the melting point of the first polylactic acid fiber tow will also be higher.
  • low-temperature crystallization is induced by drafting stress.
  • the crystallinity of the drawn tow is improved, and the thermal stability of the tow size is improved. Improved, it can achieve better curling and shaping, ensuring that the tow has appropriate rigidity and curling properties, as well as good elasticity and opening properties, and low heat shrinkage properties.
  • polylactic acid with a L-isomer content at a second predetermined value is obtained, triacetin is added to obtain a second component raw material, and the second component raw material is spun into a second polylactic acid fiber tow; the second component The predetermined value is lower than the first predetermined value; making the second polylactic acid fiber tow less crystalline than the first polylactic acid fiber tow, but providing more swelling performance and bonding with the addition of triacetin. performance.
  • the second predetermined value is not higher than the first predetermined value; generally speaking, the value range of the second predetermined value is 92% to 95%, and the second component raw material contains 92% to 95% of the levorotatory isomer, And it is necessary to add triacetin to the second component raw material. Under the action of triacetin, the second polylactic acid fiber tow swells and bonds, and can finally be combined with the first polylactic acid obtained from the first component raw material. The fiber tows are combined to obtain a well-bonded sheath-core structure polylactic acid tow.
  • first polylactic acid fiber tows are compounded to form an inner core
  • second polylactic acid fiber tows are compounded to form an outer skin
  • the outer skin is wrapped around the outside of the inner core to form Sheath-core type polylactide fiber filter rod.
  • the quantity ratio of the polylactic acid fiber tows in the inner core 1 and the outer skin 2 ranges from 30:70 to 35:65, that is, the mass ratio of the core to the skin is within this range.
  • polylactic acid raw materials are strictly controlled, so that all outer skins have uniform crystallinity, all inner cores also have uniform crystallinity, and the nodes are evenly distributed during tow crystallization, making the processing process more stable.
  • the polylactic acid fiber filter rod produced has a gradient crystallinity on the inside and outside, and the multi-layer structure is processed in groups.
  • the raw materials of polylactic acid fiber tows in the inner core and outer skin need to ensure the same origin, batch and purification steps, that is, uniqueness, then the cigarette factory purchases both at the same time.
  • the two types of raw materials cannot be mixed for processing, then the two types of raw materials are directly prepared on two different production lines to obtain two different polylactic acid fiber tows.
  • the L-lactic acid monomer of the two types of raw materials For comparison, the raw materials with high L-lactic acid monomer content are prepared according to the preparation method of the inner core, and the raw materials with low L-lactic acid monomer content are prepared according to the preparation method of the outer skin.
  • the two kinds of polylactic acid fiber tows are prepared inside and outside. The combination of distribution not only achieves the uniqueness of a single layer of raw materials, but also satisfies the gradient of crystallinity inside and outside.
  • the invention is a group-processed polylactic acid fiber filter rod, which is simple to set up and strictly controls the properties of polylactic acid raw materials, so that all outer skins have uniform crystallinity, and all inner cores also have uniform crystallinity, and the silk During beam crystallization, the nodes are evenly distributed, and the inner and outer sides of the polylactic acid fiber filter rod produced have a gradual degree of crystallinity, making the processing process more stable.
  • Embodiment 2 still as shown in FIG1 , is only one embodiment of the present invention.
  • nucleating agents are added to both the first component raw material and the second component raw material, and the nucleating agent content in the first component raw material is not lower than the nucleating agent content in the second component raw material, thereby further increasing the crystallinity gradient between the inner and outer sides of the polylactic acid fiber filter rod.
  • a transition layer 3 is provided between the inner core 1 and the outer skin 2.
  • the transition layer is composed of several polylactic acid fiber tows, and the polylactic acid fiber tows in the transition layer 3
  • the L-lactic acid monomer content in the component raw materials used in the bundle is not higher than the L-lactic acid monomer content in the first component raw material and is not lower than the L-lactic acid monomer content in the second component raw material.
  • the number of the transition layers 3 is at least two, and the polylactic acid fiber tows used in the transition layers 3 close to the inner core 1 have a L-lactic acid monomer content in the raw materials that is not lower than that of the transition layers 3 close to the inner core 1.
  • the L-lactic acid monomer content in the component raw materials used for the polylactic acid fiber tows of the transition layer 3 of the outer skin 2 is determined.
  • Multiple transition layers 3 are also processed in groups. Multiple raw materials can be processed in multiple production lines to form polylactic acid fiber tows, and finally they are coated layer by layer according to the relationship between the L-lactic acid monomer content.
  • the component raw materials used for the polylactic acid fiber tows of the transition layer 3 are also added with a nucleating agent, and the content of the nucleating agent in this component raw material is not higher than the nucleating agent in the first component raw material.
  • the content of the agent is not less than the content of the nucleating agent in the second component raw material.
  • the polylactic acid fiber tows of the transition layer 3 on the inner side are made of ingredients added to the component raw materials. The more nuclear agents there are.
  • an acetate fiber tow layer is provided on the outside of the outer skin 2, that is, an acetate fiber tow outer layer is covered on the outside of the polylactic acid fiber tow filter rod, and the bonding effect of the acetate fiber tow layer is utilized. And the adsorption performance makes the filter rod structural stability better and the adsorption performance of the filter rod is guaranteed.
  • Embodiment 3 as shown in Figure 2, the present invention also provides a method for preparing group-processed polylactic acid fiber filter rods in all the above embodiments, including the following steps:
  • S1 Obtain polylactic acid with a L-isomer content at a first predetermined value, add a dispersant to obtain the first component raw material, and induce crystallization through drafting stress during spinning of the first component raw material to obtain the first polylactic acid fiber tow. ;
  • S2 Obtain polylactic acid with a L-isomer content at a second predetermined value, add triacetin to obtain a second component raw material, and spin the second component raw material into a second polylactic acid fiber tow; the second predetermined value The value is lower than the first predetermined value;
  • S3 Compound a plurality of first polylactic acid fiber tows to form an inner core, composite a plurality of second polylactic acid fiber tows to form an outer skin, and wrap the outer skin around the outside of the inner core to form Sheath-core type polylactide fiber filter rod.
  • step S3 Before performing step S3, obtain polylactic acid with a L-isomer content at a third predetermined value, obtain a third polylactic acid fiber tow, and combine multiple third polylactic acid fiber tows to form a transition layer;
  • the transition layer is wrapped around the inner core, and then the outer skin is wrapped around the transition layer.
  • step S3 After performing step S3, wrap the acetate fiber bundle layer on the outside of the outer skin.
  • the present invention is a group-processed polylactic acid fiber filter rod and its preparation method. It is simple to set up and strictly controls the properties of polylactic acid raw materials, so that all outer skins have uniform crystallinity and all inner cores also have uniform crystallinity. degree, and the nodes are evenly distributed when the tows crystallize, and the inner and outer sides of the polylactic acid fiber filter rod produced have a gradual degree of crystallinity, the processing process is more stable, and the adsorption performance of the filter rod is guaranteed.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Multicomponent Fibers (AREA)

Abstract

提供一种分组加工的聚乳酸纤维滤棒及其制备方法，涉及烟支制备技术，包括内层芯（1）和外层皮（2），内层芯（1）和外层皮（2）均由若干根聚乳酸纤维丝束复合而成，内层芯（1）的聚乳酸纤维丝束采用第一组分原料制备而成，外层皮（2）中的聚乳酸纤维丝束采用第二组分原料制备而成，第一组分原料的左旋乳酸单体含量高于第二组分原料的左旋乳酸单体含量，且第一组分原料中添加有分散剂，第二组分原料中添加有三乙酸甘油酯。制备方法设置简单，对聚乳酸原料性质进行严格控制，使得所有外层皮（2）具有统一的结晶度，所有内层芯（1）也具有统一的结晶度，且丝束结晶时结点分布均匀，且制得的聚乳酸纤维滤棒内外侧具有渐变的结晶度，加工过程更稳定，滤棒的吸附性能有保障。

Description

一种分组加工的聚乳酸纤维滤棒及其制备方法 技术领域
 本发明涉及烟支制备技术领域，尤其是，本发明涉及一种分组加工的聚乳酸纤维滤棒及其制备方法。
 背景技术
 聚乳酸（poly lactic acid，PLA）是由可再生植物资源中的淀粉发酵制取乳酸，而后经化学合成制备成高分子材料，具有良好的循环再生性和生物降解性，具有以下特点：1、以可再生的植物资源（玉米、小麦、甜菜、大米、土豆、山芋等）以及有机废弃物（玉米芯或其它农作物的根、茎、叶、皮等）为原料，摆脱了对木材和石油资源的依赖，符合可持续发展的要求；2、能够完全生物降解，在自然环境中经过一定时间会自然分解为水和二氧化碳，不造成环境污染，产生的二氧化碳通过植物光合作用得到重新利用，成为一个永恒的、封闭的碳循环系统，是名副其实的“绿色材料”；3、与涤纶、锦纶、腈纶三大合成纤维相比，生产聚乳酸纤维的能源消耗较低，是一种相对低资源环境负荷的高分子材料；4、具有良好的加工性能，可采用一般热塑性树脂的熔融纺丝方法生产丝束。
 目前，聚乳酸纤维已经被开发出用于烟用丝束等领域，但是烟用丝束用聚乳酸纤维和常规的服装用聚乳酸丝束在性能要求上存在很大差别，如服装用聚乳酸纤维必须满足纤维纺制、编织和织物印染、洗涤、熨烫的要求，必须有很高的结晶度、取向度和机械强度，能耐温80～100℃，必须在洗涤剂水溶液和干洗溶剂中不溶解、不溶胀，需要一定的吸湿性，同时对周围环境中的其它气体物质吸附越少越好。但是作为烟用丝束，则需要满足以下要求：（1）由它卷制而成的滤棒无毒、无味、安全性好；（2）丝束稳定性好，能满足滤棒成型设备和工艺要求；（3）具有适宜的刚性和卷曲性能，使之具有良好的弹性和开松性，在较少丝束填充量的情况下，通过添加增塑剂或胶黏剂后，滤棒能满足一定的硬度、吸阻和外观质量要求，有较高的出棒率；（4）具备足够的耐热性，卷烟抽吸过程中，滤嘴不塌陷、变形；（5）对烟气有害成分具有较高的过滤效率；（6）不影响卷烟感官质量。因此，必须开发专用的纺丝及后处理工艺技术，才能满足烟用要求。
 例如中国专利发明专利CN103074716A涉及一种皮芯型聚乳酸烟用丝束和滤棒及其制备方法，丝束中的单根纤维是由内芯和外皮构成的皮芯型结构，皮层和芯层主体树脂均为聚乳酸，皮层树脂和芯层树脂的重量比为20∶80~40∶60，丝束皮层和芯层结晶度分别为3-25%和25-60%，皮层和芯层熔点分别为120-150oC和150-175oC。上述发明结合了芯层和皮层两者的优势，芯层提供了较高的物理机械性能和耐热性能，皮层提供了良好的可粘接性。可方便地使用常见增塑剂(如三醋酸甘油酯)进行滤棒成型加工。此外，上述发明提供的皮芯型聚乳酸丝束其芯层、皮层均具有良好的生物降解性能，为环境友好型烟用丝束。
 但是上述滤棒制备结构依然存在以下问题：皮层树脂和芯层树脂均采用多种原料复合纺丝，没有对聚乳酸原料性质进行控制，多种原料的结晶程度的差异，丝束结点位置及多少差异较大，使得上述皮芯型聚乳酸丝束加工过程不稳定。
 因此为了解决上述问题，设计一种合理高效的分组加工的聚乳酸纤维滤棒对我们来说是很有必要的。
 发明内容
 本发明的目的在于提供一种分组加工的聚乳酸纤维滤棒，其设置简单，对聚乳酸原料性质进行严格控制，使得所有外层皮具有统一的结晶度，所有内层芯也具有统一的结晶度，且丝束结晶时结点分布均匀，且制得的聚乳酸纤维滤棒内外侧具有渐变的结晶度，加工过程更稳定。
 为达到上述目的，本发明采用如下技术方案得以实现的：
一种分组加工的聚乳酸纤维滤棒，包括内层芯和设置于所述内层芯外侧的外层皮，所述内层芯和外层皮均由若干根聚乳酸纤维丝束复合而成，所述内层芯中的聚乳酸纤维丝束采用第一组分原料制备而成，所述外层皮中的聚乳酸纤维丝束采用第二组分原料制备而成，所述第一组分原料内的左旋乳酸单体含量高于所述第二组分原料内的左旋乳酸单体含量，且所述第一组分原料中添加有分散剂，所述第二组分原料中添加有三乙酸甘油酯；所述内层芯中的聚乳酸纤维丝束通过牵伸应力诱导结晶制成，用以提高所述内层芯中的聚乳酸纤维丝束的结晶度。
 作为本发明的优选，所述内层芯和外层皮中的聚乳酸纤维丝束数量比例范围为30:70至35:65之间。
 作为本发明的优选，所述第一组分原料和第二组分原料中均添加有成核剂，且所述第一组分原料中的成核剂含量不低于所述第二组分原料中的成核剂含量。
 作为本发明的优选，所述内层芯和外层皮之间设置有过渡层，所述过渡层由若干根聚乳酸纤维丝束复合而成，且所述过渡层中的聚乳酸纤维丝束采用的组分原料中的左旋乳酸单体含量不高于所述第一组分原料内的左旋乳酸单体含量且不低于所述第二组分原料内的左旋乳酸单体含量。
 作为本发明的优选，所述过渡层的数量至少为两个，且靠近所述内层芯的过渡层的聚乳酸纤维丝束采用的组分原料中的左旋乳酸单体含量不低于靠近所述外层皮的过渡层的聚乳酸纤维丝束采用的组分原料中的左旋乳酸单体含量。
 作为本发明的优选，所述过渡层的聚乳酸纤维丝束采用的组分原料中也添加有成核剂，该组分原料中的成核剂含量不高于所述第一组分原料中的成核剂含量且不低于所述第二组分原料中的成核剂含量。
 作为本发明的优选，所述外层皮外侧设置有醋纤丝束层。
 本发明还提供一种分组加工的聚乳酸纤维滤棒的制备方法，包括以下步骤：
S1：获取左旋体含量在第一预定值的聚乳酸，添加分散剂得到第一组分原料，在第一组分原料进行纺丝时通过牵伸应力诱导结晶，得到第一聚乳酸纤维丝束；
S2：获取左旋体含量在第二预定值的聚乳酸，添加三乙酸甘油酯得到第二组分原料，在第二组分原料进行纺丝到第二聚乳酸纤维丝束；所述第二预定值低于第一预定值；
S3：将多根第一聚乳酸纤维丝束复合形成内层芯，将多根第二聚乳酸纤维丝束复合形成外层皮，并将所述外层皮包覆于内层芯外侧，形成皮芯型的聚乳酸纤维滤棒。
 作为本发明的优选，在执行步骤S3之前，获取左旋体含量在第三预定值的聚乳酸，得到第三聚乳酸纤维丝束，将多根第三聚乳酸纤维丝束复合形成过渡层；
在执行步骤S3时，将所述过渡层包覆于内层芯外侧，再将所述外层皮包覆于过渡层外侧。
 作为本发明的优选，在执行步骤S3之后，在所述外层皮外侧包覆醋纤丝束层。
 本发明一种分组加工的聚乳酸纤维滤棒及其制备方法的有益效果在于：设置简单，对聚乳酸原料性质进行严格控制，使得所有外层皮具有统一的结晶度，所有内层芯也具有统一的结晶度，且丝束结晶时结点分布均匀，且制得的聚乳酸纤维滤棒内外侧具有渐变的结晶度，加工过程更稳定。
 附图说明
 图1为本发明一种分组加工的聚乳酸纤维滤棒的一个实施例的截面示意图；
图2为本发明一种分组加工的聚乳酸纤维滤棒的制备方法的流程示意图；
图中：1、内层芯，2、外层皮，3、过渡层，4、醋纤丝束层。
 实施方式
 以下是本发明的具体实施例，对本发明的技术方案作进一步的描述，但本发明并不限于这些实施例。
 现在将参照附图来详细描述本发明的各种示例性实施例。应注意到：除非另外具体说明，否则在这些实施例中阐述的模块和步骤的相对布置和步骤不限制本发明的范围。
 同时，应当明白，为了便于描述，附图中的流程并不仅仅是单独进行，而是多个步骤相互交叉进行。
 在本发明的描述中，需要说明的是，术语“中心”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，或者是本发明产品使用时惯常摆放的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”等仅用于区分描述，而不能理解为指示或暗示相对重要性。
 以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本发明及其应用或使用的任何限制。
 对于相关领域普通技术人员已知的技术、方法及系统可能不作详细讨论，但在适当情况下，技术、方法及系统应当被视为本说明书的一部分。
 实施例一：如图1所示，一种分组加工的聚乳酸纤维滤棒，包括内层芯1和设置于所述内层芯1外侧的外层皮2，所述内层芯1和外层皮2均由若干根聚乳酸纤维丝束复合而成，所述内层芯1中的聚乳酸纤维丝束采用第一组分原料制备而成，所述外层皮2中的聚乳酸纤维丝束采用第二组分原料制备而成，所述第一组分原料内的左旋乳酸单体含量高于所述第二组分原料内的左旋乳酸单体含量，且所述第一组分原料中添加有分散剂，所述第二组分原料中添加有三乙酸甘油酯；所述内层芯1中的聚乳酸纤维丝束通过牵伸应力诱导结晶制成，用以提高所述内层芯1中的聚乳酸纤维丝束的结晶度。
 在本发明中，获取左旋体含量在第一预定值的聚乳酸，添加分散剂得到第一组分原料，在第一组分原料进行纺丝时通过牵伸应力诱导结晶，得到第一聚乳酸纤维丝束，使得第一聚乳酸纤维丝束的结晶度更高，提供了较高的物理机械性能和耐热性能；加入分散剂可以使得高结晶度的第一聚乳酸纤维丝束中不易形成大的结点，便于进行分切。
 一般来说，第一预定值的取值范围为95%至98%，即在第一组分原料中含有95%至98%的左旋体（即左旋乳酸单体），在具有如此高含量的左旋体下，第一聚乳酸纤维丝束熔点也会较高，在纺丝和后加工过程中，通过牵伸应力诱导低温结晶，牵伸后的丝束结晶度提高，丝束尺寸热稳定性提高，可以较好地卷曲定型，确保丝束具有适宜的刚性和卷曲性能，并具有良好的弹性和开松性，较低的热收缩性能。
 同样的，获取左旋体含量在第二预定值的聚乳酸，添加三乙酸甘油酯得到第二组分原料，在第二组分原料进行纺丝到第二聚乳酸纤维丝束；所述第二预定值低于第一预定值；使得第二聚乳酸纤维丝束较第一聚乳酸纤维丝束的结晶度低一些，但是在三乙酸甘油酯的添加下提供了更多的溶胀性能和粘接性能。
 所述第二预定值不高于第一预定值；一般来说，第二预定值的取值范围为92%至95%，在第二组分原料中含有92%至95%的左旋体，且需要在第二组分原料中添加三乙酸甘油酯，在三乙酸甘油酯的作用下，第二聚乳酸纤维丝束溶胀且粘结，最终可以与第一组分原料得到的第一聚乳酸纤维丝束进行配合，得到粘结良好的皮芯型结构聚乳酸丝束。
 最后，将多根第一聚乳酸纤维丝束复合形成内层芯，将多根第二聚乳酸纤维丝束复合形成外层皮，并将所述外层皮包覆于内层芯外侧，形成皮芯型的聚乳酸纤维滤棒。
 在这里，所述内层芯1和外层皮2中的聚乳酸纤维丝束数量比例范围为30:70至35:65之间，也就是芯与皮的质量占比在该范围内。
 需要注意的是：同一批进行生产的聚乳酸纤维滤棒中，所有第一组分原料的产地、批次以及纯化步骤都相同；
同一批进行生产的聚乳酸纤维滤棒中，所有第二组分原料的产地、批次以及纯化步骤都相同。
 也可以理解为：一根聚乳酸滤棒中，或者同时进行产出的一批聚乳酸滤棒中，所有的第一聚乳酸纤维丝束性质相同，生产的所有第一聚乳酸纤维丝束的结晶度是均匀分布的，不易产生较大的结块，在分切时不易对合金刀产生撞击损坏；所有的第二聚乳酸纤维丝束的性质也是相同。
 这样，对聚乳酸原料性质进行严格控制，使得所有外层皮具有统一的结晶度，所有内层芯也具有统一的结晶度，且丝束结晶时结点分布均匀，加工过程更稳定。
 而且，第一聚乳酸纤维丝束的结晶度高于第二聚乳酸纤维丝束的结晶度，制得的聚乳酸纤维滤棒内外侧具有渐变的结晶度，多层结构分组加工。
 在这里就延伸出一层意义，既然内层芯和外层皮中的聚乳酸纤维丝束的原材料需要保证原产地、批次以及纯化步骤都相同，即唯一性，那么制烟厂同时进货两类原料的前提下，又不能将其混合进行加工，那么就直接将两类原料在两个不同的生产线上进行制备得到两种不同的聚乳酸纤维丝束，根据两类原料的左旋乳酸单体含量进行对比，左旋乳酸单体含量高的原料按照内层芯的制备方式进行制备，左旋乳酸单体含量低的原料按照外层皮的制备方式进行制备，最后将两种聚乳酸纤维丝束内外分布的结合在一起，不仅达到了单层原料的唯一性，又满足内外侧的结晶度渐变。
 本发明一种分组加工的聚乳酸纤维滤棒，其设置简单，对聚乳酸原料性质进行严格控制，使得所有外层皮具有统一的结晶度，所有内层芯也具有统一的结晶度，且丝束结晶时结点分布均匀，且制得的聚乳酸纤维滤棒内外侧具有渐变的结晶度，加工过程更稳定。
 实施例二，仍如图1所示，仅为本发明的其中一个实施例，在实施例一的基础上，本发明一种分组加工的聚乳酸纤维滤棒中，所述第一组分原料和第二组分原料中均添加有成核剂，且所述第一组分原料中的成核剂含量不低于所述第二组分原料中的成核剂含量，进一步加大聚乳酸纤维滤棒中内外侧的结晶度渐变。
 还有，所述内层芯1和外层皮2之间设置有过渡层3，所述过渡层由若干根聚乳酸纤维丝束复合而成，且所述过渡层3中的聚乳酸纤维丝束采用的组分原料中的左旋乳酸单体含量不高于所述第一组分原料内的左旋乳酸单体含量且不低于所述第二组分原料内的左旋乳酸单体含量。
 实际上，所述过渡层3的数量至少为两个，且靠近所述内层芯1的过渡层3的聚乳酸纤维丝束采用的组分原料中的左旋乳酸单体含量不低于靠近所述外层皮2的过渡层3的聚乳酸纤维丝束采用的组分原料中的左旋乳酸单体含量。
 多个过渡层3也都是分组加工，可以多个成产线对多种原料进行加工形成聚乳酸纤维丝束，最后再根据左旋乳酸单体含量的关系逐层进行包覆。
 以及，所述过渡层3的聚乳酸纤维丝束采用的组分原料中也添加有成核剂，该组分原料中的成核剂含量不高于所述第一组分原料中的成核剂含量且不低于所述第二组分原料中的成核剂含量，多层过渡层的情况下，越靠内侧的过渡层3的聚乳酸纤维丝束采用的组分原料中添加的成核剂越多。
 最后，所述外层皮2外侧设置有醋纤丝束层，也就是在聚乳酸纤维丝束滤棒的外侧覆盖一层醋纤丝束质外层，利用醋纤丝束层的粘接效果以及吸附性能，使得滤棒结构稳定性更好，滤棒的吸附性能有保障。
 实施例三，如图2所示，本发明还提供上述所有实施例中的一种分组加工的聚乳酸纤维滤棒的制备方法，包括以下步骤：
S1：获取左旋体含量在第一预定值的聚乳酸，添加分散剂得到第一组分原料，在第一组分原料进行纺丝时通过牵伸应力诱导结晶，得到第一聚乳酸纤维丝束；
S2：获取左旋体含量在第二预定值的聚乳酸，添加三乙酸甘油酯得到第二组分原料，在第二组分原料进行纺丝到第二聚乳酸纤维丝束；所述第二预定值低于第一预定值；
S3：将多根第一聚乳酸纤维丝束复合形成内层芯，将多根第二聚乳酸纤维丝束复合形成外层皮，并将所述外层皮包覆于内层芯外侧，形成皮芯型的聚乳酸纤维滤棒。
 在执行步骤S3之前，获取左旋体含量在第三预定值的聚乳酸，得到第三聚乳酸纤维丝束，将多根第三聚乳酸纤维丝束复合形成过渡层；
在执行步骤S3时，将所述过渡层包覆于内层芯外侧，再将所述外层皮包覆于过渡层外侧。
 在执行步骤S3之后，在所述外层皮外侧包覆醋纤丝束层。
 本发明一种分组加工的聚乳酸纤维滤棒及其制备方法，其设置简单，对聚乳酸原料性质进行严格控制，使得所有外层皮具有统一的结晶度，所有内层芯也具有统一的结晶度，且丝束结晶时结点分布均匀，且制得的聚乳酸纤维滤棒内外侧具有渐变的结晶度，加工过程更稳定，滤棒的吸附性能有保障。
 本发明不局限于上述具体的实施方式，本发明可以有各种更改和变化。凡是依据本发明的技术实质对以上实施方式所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围。

Claims (10)

  1.  一种分组加工的聚乳酸纤维滤棒，其特征在于：包括内层芯（1）和设置于所述内层芯（1）外侧的外层皮（2），所述内层芯（1）和外层皮（2）均由若干根聚乳酸纤维丝束复合而成，所述内层芯（1）中的聚乳酸纤维丝束采用第一组分原料制备而成，所述外层皮（2）中的聚乳酸纤维丝束采用第二组分原料制备而成，所述第一组分原料内的左旋乳酸单体含量高于所述第二组分原料内的左旋乳酸单体含量，且所述第一组分原料中添加有分散剂，所述第二组分原料中添加有三乙酸甘油酯；所述内层芯（1）中的聚乳酸纤维丝束通过牵伸应力诱导结晶制成，用以提高所述内层芯（1）中的聚乳酸纤维丝束的结晶度。
  2.  根据权利要求1所述的一种分组加工的聚乳酸纤维滤棒，其特征在于：所述内层芯（1）和外层皮（2）中的聚乳酸纤维丝束数量比例范围为30:70至35:65之间。
  3.  根据权利要求1所述的一种分组加工的聚乳酸纤维滤棒，其特征在于：所述第一组分原料和第二组分原料中均添加有成核剂，且所述第一组分原料中的成核剂含量不低于所述第二组分原料中的成核剂含量。
  4.  根据权利要求1所述的一种分组加工的聚乳酸纤维滤棒，其特征在于：所述内层芯（1）和外层皮（2）之间设置有过渡层（3），所述过渡层由若干根聚乳酸纤维丝束复合而成，且所述过渡层（3）中的聚乳酸纤维丝束采用的组分原料中的左旋乳酸单体含量不高于所述第一组分原料内的左旋乳酸单体含量且不低于所述第二组分原料内的左旋乳酸单体含量。
  5.  根据权利要求4所述的一种分组加工的聚乳酸纤维滤棒，其特征在于：所述过渡层（3）的数量至少为两个，且靠近所述内层芯（1）的过渡层（3）的聚乳酸纤维丝束采用的组分原料中的左旋乳酸单体含量不低于靠近所述外层皮（2）的过渡层（3）的聚乳酸纤维丝束采用的组分原料中的左旋乳酸单体含量。
  6.  根据权利要求4所述的一种分组加工的聚乳酸纤维滤棒，其特征在于：所述过渡层（3）的聚乳酸纤维丝束采用的组分原料中也添加有成核剂，该组分原料中的成核剂含量不高于所述第一组分原料中的成核剂含量且不低于所述第二组分原料中的成核剂含量。
  7.  根据权利要求1所述的一种分组加工的聚乳酸纤维滤棒，其特征在于：所述外层皮（2）外侧设置有醋纤丝束层（4）。
  8.  根据权利要求1～7任意一项所述的一种分组加工的聚乳酸纤维滤棒的制备方法，其特征在于，包括以下步骤：
    S1：获取左旋体含量在第一预定值的聚乳酸，添加分散剂得到第一组分原料，在第一组分原料进行纺丝时通过牵伸应力诱导结晶，得到第一聚乳酸纤维丝束；
    S2：获取左旋体含量在第二预定值的聚乳酸，添加三乙酸甘油酯得到第二组分原料，在第二组分原料进行纺丝到第二聚乳酸纤维丝束；所述第二预定值低于第一预定值；
    S3：将多根第一聚乳酸纤维丝束复合形成内层芯，将多根第二聚乳酸纤维丝束复合形成外层皮，并将所述外层皮包覆于内层芯外侧，形成皮芯型的聚乳酸纤维滤棒。
  9.  根据权利要求8所述的一种分组加工的聚乳酸纤维滤棒的制备方法，其特征在于：
    在执行步骤S3之前，获取左旋体含量在第三预定值的聚乳酸，得到第三聚乳酸纤维丝束，将多根第三聚乳酸纤维丝束复合形成过渡层；
    在执行步骤S3时，将所述过渡层包覆于内层芯外侧，再将所述外层皮包覆于过渡层外侧。
  10.  根据权利要求8所述的一种分组加工的聚乳酸纤维滤棒的制备方法，其特征在于：
    在执行步骤S3之后，在所述外层皮外侧包覆醋纤丝束层。
PCT/CN2023/076384 2022-09-23 2023-02-16 一种分组加工的聚乳酸纤维滤棒及其制备方法 WO2024060499A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202211162199.9A CN115413819A (zh) 2022-09-23 2022-09-23 一种分组加工的聚乳酸纤维滤棒及其制备方法
CN202211162199.9 2022-09-23

Publications (1)

Publication Number Publication Date
WO2024060499A1 true WO2024060499A1 (zh) 2024-03-28

Family

ID=84205057

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2023/076384 WO2024060499A1 (zh) 2022-09-23 2023-02-16 一种分组加工的聚乳酸纤维滤棒及其制备方法

Country Status (2)

Country Link
CN (1) CN115413819A (zh)
WO (1) WO2024060499A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115413819A (zh) * 2022-09-23 2022-12-02 云南中烟工业有限责任公司 一种分组加工的聚乳酸纤维滤棒及其制备方法
CN116236854A (zh) * 2023-05-11 2023-06-09 广东鑫球新材料科技有限公司 一种可变降解材料的滤芯

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009102796A (ja) * 2008-12-28 2009-05-14 Unitika Ltd ポリ乳酸系複合短繊維からなる不織布及びそれらの製造方法
JP2009148233A (ja) * 2007-12-21 2009-07-09 Japan Tobacco Inc 喫煙物品
CN103074716A (zh) * 2013-02-07 2013-05-01 中国烟草总公司郑州烟草研究院 一种皮芯型聚乳酸烟用丝束和滤棒及其制备方法
CN106637500A (zh) * 2016-11-08 2017-05-10 江南大学 一种耐热性高的皮芯结构聚乳酸纤维及其制备方法
US20170145597A1 (en) * 2014-04-22 2017-05-25 Fiber Innovation Technology, Inc. Fibers comprising an aliphatic polyester blend, and yarns, tows, and fabrics formed therefrom
CN106945321A (zh) * 2016-01-06 2017-07-14 余姚市创辉树脂笔头厂 一种微孔纤维棒料制作方法
CN107199754A (zh) * 2017-06-14 2017-09-26 淄博成达塑化有限公司 三层皮芯结构的生物降解3d打印丝及其制备方法
CN216701614U (zh) * 2021-09-01 2022-06-10 上海烟草集团有限责任公司 一种基于纤维编织结构的卷烟滤棒
CN115413819A (zh) * 2022-09-23 2022-12-02 云南中烟工业有限责任公司 一种分组加工的聚乳酸纤维滤棒及其制备方法

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009148233A (ja) * 2007-12-21 2009-07-09 Japan Tobacco Inc 喫煙物品
JP2009102796A (ja) * 2008-12-28 2009-05-14 Unitika Ltd ポリ乳酸系複合短繊維からなる不織布及びそれらの製造方法
CN103074716A (zh) * 2013-02-07 2013-05-01 中国烟草总公司郑州烟草研究院 一种皮芯型聚乳酸烟用丝束和滤棒及其制备方法
US20170145597A1 (en) * 2014-04-22 2017-05-25 Fiber Innovation Technology, Inc. Fibers comprising an aliphatic polyester blend, and yarns, tows, and fabrics formed therefrom
CN106945321A (zh) * 2016-01-06 2017-07-14 余姚市创辉树脂笔头厂 一种微孔纤维棒料制作方法
CN106637500A (zh) * 2016-11-08 2017-05-10 江南大学 一种耐热性高的皮芯结构聚乳酸纤维及其制备方法
CN107199754A (zh) * 2017-06-14 2017-09-26 淄博成达塑化有限公司 三层皮芯结构的生物降解3d打印丝及其制备方法
CN216701614U (zh) * 2021-09-01 2022-06-10 上海烟草集团有限责任公司 一种基于纤维编织结构的卷烟滤棒
CN115413819A (zh) * 2022-09-23 2022-12-02 云南中烟工业有限责任公司 一种分组加工的聚乳酸纤维滤棒及其制备方法

Also Published As

Publication number Publication date
CN115413819A (zh) 2022-12-02

Similar Documents

Publication Publication Date Title
WO2024060499A1 (zh) 一种分组加工的聚乳酸纤维滤棒及其制备方法
CN110656400B (zh) 一种皮芯型聚乳酸烟用丝束、制备方法及其应用
CN101660215A (zh) 蛋白质与纤维素复合纤维及其制造方法
CN1175289A (zh) 工业与非工业用纺织品以及包装材料
CN101671858A (zh) 椰碳纤维的制造方法
CN104963094A (zh) 一种利用微生物产细菌纤维素复合纤维制备的非织造布及其制备方法
CN103015040A (zh) 一种利用柞蚕长丝制造蚕丝被的方法
CN111206333A (zh) 一种环保纤维絮片及其制造方法
WO2024060502A1 (zh) 一种耐温性好的聚乳酸纤维滤棒的制备方法
CN102912474B (zh) 一种复合纤维及其制备方法
CN110409055A (zh) 以植物秸秆制备管式无纺布的方法
CN113584629B (zh) 一种皮芯型烟用丝束及其制备方法
CN112251841A (zh) 一种共纺改性皮芯结构聚乳酸丝束及其制备方法
WO2024060501A1 (zh) 一种防打刀的聚乳酸纤维滤棒的制备方法
CN104127074A (zh) 一种利用野生柞蚕丝和桑蚕丝搭配制造蚕丝被的方法
CN102704030A (zh) 一种高卷曲指数的聚乳酸烟用丝束及制备方法
CN112251844A (zh) 一种用于香烟过滤嘴具有y型皮芯结构的可降解丝束及其制备方法
CN101331979A (zh) 农作物秸秆粘胶纤维做香烟滤嘴材料方法
CN112251845A (zh) 一种用于香烟过滤嘴具有皮芯结构的可降解丝束及其制备方法
JP2003253524A (ja) マンナン繊維，マンナンシート，またはハイブリッド・マンナン，および製造方法
CN112267173A (zh) 一种用于香烟过滤嘴的可降解丝束及其制备方法
CN107034546A (zh) 一种混合纤维纺织材料及其制备方法
CN213772297U (zh) 一种用于制备聚乳酸皮芯结构丝束的喷丝板
CN112251846A (zh) 一种用于香烟过滤嘴具有o型皮芯结构的可降解丝束及其制备方法
CN112267172A (zh) 一种用于香烟过滤嘴具有h型皮芯结构的可降解丝束及其制备方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23866803

Country of ref document: EP

Kind code of ref document: A1