CN107109792B - 生产发泡体幅材的方法 - Google Patents
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Abstract
生产无菌的发泡体幅材的方法，其中所述方法包括以下步骤：制备湿发泡体(1)，将湿发泡体(1)进料至流浆箱(2,11)，通过流浆箱(2,11)分布湿发泡体、用电子束辐射(3a,3b,3c)处理湿发泡体(1)以使湿发泡体(1)固定且灭菌，在移动的网(4)上接收经电子束处理的发泡体以形成发泡体幅材(6,13)，挤压和发泡体幅材(6,13)，和将发泡体幅材(6,13)干燥。
Description
本发明涉及生产无菌(杀菌)的发泡体幅材(sterilized foam web)的方法。
本发明进一步涉及无菌的发泡体幅材。
最终，本发明涉及发泡体产品。
现今，存在已知的在造纸机中通过如下生产多种发泡体的幅材的方法：让湿发泡体穿过流浆箱至移动的网(wire)、然后将发泡体幅材干燥，例如DE19857096、US55711383、DE19917809、US4686006和US4285767。
然而，在使发泡体层不崩塌(collapse)或致密化(densify)的情况下，使用传统的造纸机、干燥设备(例如IR或热辊接触干燥)干燥发泡体幅材是不容易的。而且，当湿发泡体遇到网(wire)时，湿发泡体就已经倾向于崩塌。
本发明的目标是提供在造纸机中生产发泡体幅材的新方法，所述新方法消除或减轻上述缺陷中的至少一些。另一目标是通过使用流浆箱提供发泡体幅材，其包括一个或多个层，所述流浆箱允许获得具有高松厚度(bulk)的三维(3D)发泡体幅材。
在本发明以下的说明书中，将使用术语“天然纤维”。在本文中，该术语包括木质纤维、植物纤维、和/或它们的衍生物或它们的混合物。
而且，将频繁地使用术语“发泡体”或“湿发泡体(wet foam)”。湿发泡体包括天然纤维、液体和至少一种添加剂的混合物。添加剂中的至少一种适用于通过电子辐射(见下文)而稳定化/硬化(stiffened)。发泡体的液体可为水或水与多种挥发性溶剂的共混物。而且，液体可以是完全基于溶剂的液体，例如甲醇、乙醇、甲苯等。
说明书进一步涉及术语“无菌的发泡体幅材”。在本文中所述术语包括由湿发泡体制得的平面的(flat)或三维成形的(3D-formed)发泡体幅材。发泡体幅材适用于制造发泡体产品、例如食物容器、盘(tray)、杯、气体过滤器、空气过滤器、液体过滤器、口罩、隔层(insulation)、卫生垫和卫生棉(tampon)等。然而，这些仅是示例并且明显由本发明的发泡体幅材制得的其他发泡体产品是可能的。
而且，说明书包括术语“电子束辐射”。电子束辐射是涉及出于多种目的使用(通常为高能量)电子以处理物体的方法。电子辐射可能的用途包括杀菌(sterilization)和交联聚合物。电子能量典型地在keV至MeV的范围变化，取决于所需渗透的深度。辐射剂量通过以戈瑞(Gray，Gy)计。
本发明的方法的特征在于所述方法包括以下步骤：
-制备湿发泡体,
-将湿发泡体进料至流浆箱,
-通过流浆箱分布(distribute)湿发泡体，
-用电子束辐射处理湿发泡体以使湿发泡体固定并且灭菌，
-在移动的网上接收经电子束处理的发泡体以形成发泡体幅材，
-挤压和发泡体幅材，和
-干燥发泡体幅材。
无菌的发泡体幅材的特征在于所述幅材通过上述方法获得。
发泡体产品的特征在于其至少部分由上述发泡体幅材制得。
下面，将参照附图进一步描述本发明，其中：
图1示出造纸机中用于形成无菌的发泡体幅材的单层的设备布置的示意图。
图2示出造纸机中用于形成无菌的发泡体幅材的多层的的设备布置的示意图。
图1中的设备布置包括用于混合湿发泡体1的混合反应器7。所述布置进一步包括成型部(forming section)2、3a、3b、3c、4、5、12以从湿发泡体1形成无菌的发泡体幅材6、13。
混合反应器7包括进料装置8、9、10以向混合反应器7加入天然纤维8、液体9和添加剂10。该反应器包括混合天然纤维8、液体9和添加剂10以形成湿发泡体1的混合装置(图1中未示出)。然后将湿发泡体1运输至流浆箱2、11。
流浆箱2、11均匀地将湿发泡体1分布至移动的网4上，使得在移动的网4上形成发泡体幅材6、13。在网4上，发泡体变得脱水的/致密化的。网4可是单网4或双网4，其中发泡体位于双网4之间。网4部可包含吸水箱(suction box)以进一步使发泡体致密化。
流浆箱2可是单层流浆箱2(图1)，或多层流浆箱2(图2)。单层流浆箱2将单层发泡体幅材6分布至移动的网4上，其中发泡体幅材6包括湿发泡体1。多层流浆箱11将多层发泡体幅材13分布至移动的网4上，其中所述层中的至少一个包括湿发泡体1。多层幅材中的其他层可源自具有与湿发泡体1相同的组成的发泡体悬浮体14或具有与湿发泡体1相比具有其它性质的另一组成的发泡体悬浮体14。其他层还可源自非发泡体悬浮体，例如，包括天然纤维和液体的纤维悬浮体14或包括合成或非天然纤维(例如丙烯酸类、聚酯、人造丝、尼龙等)的其他悬浮体14。
图2中的多层流浆箱11包括制造具有三个层的多层发泡体幅材的设置(setup)，其中所述层中的至少一个包括发泡体层。然而，明显多于三个层是可能的和当然还有包括两个层的多层是可能的。
在湿发泡体1遇到网4之前、和/或遇到网4时和/或遇到网4之后，使湿发泡体1经受电子束辐射3a、3b、3c。电子束辐射使湿发泡体1固定且灭菌，使得湿发泡体1变得更稳定且当湿发泡体遇到网4时避免湿发泡体1崩塌，从而形成发泡体幅材6、13。这将产生具有高松厚度或结构规整的稳定/坚硬(stiff)的无菌的发泡体幅材6,13。
在第一实施方式中，湿发泡体经受的电子束辐射处理3a位于流浆箱2、11中。
在第二实施方式中，湿发泡体经受的电子束辐射处理3b位于流浆箱2、11之后。
在第三实施方式中，湿发泡体经受的电子束辐射处理3c位于流浆箱2、11之前。
将电子束辐射调节至一定的水平，使得产生的电子会穿过发泡体并在干燥前让发泡体生成所需的挺度(stiffness)和结构。通过使用多种幅材速度(web speed)和流浆箱2,11中的调节(固含量、化学品、气体量)，可产生发泡体的多种性质和厚度并使用电子束设备硬化。通过使用多种交联添加剂和多种量的电子束辐射，可在发泡体幅材中产生用于多种用途的多种类型的性质(从软的橡胶状到硬脆的结构)，例如纤维结构可在高度潮湿条件下携带负载。还可以产生具有多种吸收和吸附性质的材料，即诱导例如用于多种两亲材料和与所选聚合物的组合的疏水和/或亲水性质。
通过网4将经电子束处理的发泡体幅材6、13运送至挤压部12。挤压部12包括至少一个压具(press)12，其将发泡体幅材6、13的液体压出。经挤压的幅材6、13随后被运送至用于干燥发泡体幅材的干燥部5。干燥部5可包括热干燥筒5、IR(红外)加热器5、和/或热空气吹扫烘干燥器5。
本发明可快速且准确地生成多种发泡体幅材类型，其由多种组分组成且含有天然矿物质和甚至如果需要，含有非有机(un-organic)材料以向所需的包装(在运输和销售期间携带多种产品的软质/硬质轻型材料)和建筑需求(例如隔离、隔音、阻热/阻燃材料等)提供新型材料。
而且，通过选择合适的电子束辐射水平，可使发泡体的表面硬化，而在材料的更深处获得可压缩的弹簧状的材料。
电子束辐射对工作环境是无害的因为其可被准确地引导并且穿过材料的量可通过在位于电子束下方的辊或收集箱捕获(caught)。
本发明的主要优点为：就在通过流浆箱将湿发泡体分布之前，在混合反应器中制备包括天然纤维8、液体9和添加剂10(还有可电子照射活剂，electron beamableactivators)的湿发泡体1的所有混合物。因此，湿发泡体具有非常短的寿命(lifetime)。这意味着所有的发泡体都用在发泡体幅材的生产中。主要的原理在于快速发泡、快速使用以及同时通过电子束快速固定(fixing)湿发泡体以形成三维结构的发泡体。这允许不需要返回循环，因为使用了所有的湿发泡体。发泡体的快速固定会确保发泡体幅材的高速生产。
因此，当形成短寿命的湿发泡体并从流浆箱被送出时，通过使用电子束辐射，发泡体的柔性(flexibility)将被原样锁定。电子束辐射与电子束辐射活性化合物作用并导致纤维的刚性网络。
通过电子束辐射的不同能量水平可调节该结构的刚性。因此，可获得从柔性到坚硬刚性的网络的发泡体幅材。发泡体幅材立即可用于继续在发泡体产品的转化方法中。
在上文中，已经基于一些具体实施方式描述本发明。然而应理解，其他实施方式和变化也在后面的权利要求的范围中。例如电子束辐射处理可位于流浆箱之前，在流浆箱处，在流浆箱之后或所提及这些情况的组合。
Claims (8)
1.生产无菌的发泡体幅材的方法，其特征在于所述方法包括如下步骤:
-制备湿发泡体(1)，其中湿发泡体包括天然纤维、液体和至少一种添加剂的混合物，所述至少一种添加剂适合通过电子束辐射稳定化；
-将湿发泡体(1)进料至流浆箱(2,11)；
-通过流浆箱(2,11)分布湿发泡体；
-用电子束辐射(3a,3b,3c)处理湿发泡体(1)以在湿发泡体遇到网(4)之前使湿发泡体(1)固定并灭菌；
-在移动的网(4)上接收经电子束处理的发泡体以形成发泡体幅材(6,13)；
-挤压发泡体幅材(6,13)，和
-干燥发泡体幅材(6,13)，
其中网(4)包含吸水箱以进一步使发泡体致密化。
2.根据权利要求1所述的方法，其特征在于，电子束辐射(3a)在流浆箱(2,11)处遭遇湿发泡体(1)。
3.根据权利要求1所述的方法，其特征在于，电子束辐射(3b)在流浆箱(2,11)之前遭遇湿发泡体(1)。
4.根据权利要求1所述的方法，其特征在于，电子束辐射(3c)在流浆箱(2,11)之后遭遇湿发泡体(1)。
5.根据权利要求1-4任一项所述的方法，其特征在于，流浆箱为单层流浆箱(2)，其中所述流浆箱(2)在移动的网(4)上分布湿发泡体以形成单层发泡体幅材(6)。
6.根据权利要求1-4任一项所述的方法，其特征在于，流浆箱为多层流浆箱(11)，其中所述流浆箱(11)分布湿发泡体(1)和至少一种另外的悬浮体(14)以在移动的网(4)上形成多层发泡体幅材(13)。
7.根据权利要求1-4任一项所述的方法，其特征在于，干燥包括用于干燥发泡体幅材(6,13)的热筒。
8.根据权利要求1-4任一项所述的方法，其特征在于，干燥包括用于干燥发泡体幅材(6,13)的IR辐射。
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1451172A SE539865C2 (en) | 2014-10-03 | 2014-10-03 | Method for producing a foam web involving electron beam radiation |
| SE1451172-9 | 2014-10-03 | ||
| PCT/IB2015/057477 WO2016051350A1 (en) | 2014-10-03 | 2015-09-30 | Method for producing a foam web |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107109792A CN107109792A (zh) | 2017-08-29 |
| CN107109792B true CN107109792B (zh) | 2019-09-17 |
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| CN201580053814.4A Active CN107109792B (zh) | 2014-10-03 | 2015-09-30 | 生产发泡体幅材的方法 |
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| Country | Link |
|---|---|
| US (1) | US10301775B2 (zh) |
| EP (1) | EP3201392B1 (zh) |
| CN (1) | CN107109792B (zh) |
| BR (1) | BR112017006511B1 (zh) |
| CA (1) | CA2962711C (zh) |
| ES (1) | ES2733424T3 (zh) |
| PL (1) | PL3201392T3 (zh) |
| SE (1) | SE539865C2 (zh) |
| WO (1) | WO2016051350A1 (zh) |
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|---|---|---|---|---|
| SE539865C2 (en) * | 2014-10-03 | 2017-12-27 | Stora Enso Oyj | Method for producing a foam web involving electron beam radiation |
| SE538530C2 (sv) * | 2015-07-07 | 2016-09-06 | Stora Enso Oyj | Shaped tray or plate of fibrous material and a method of manufacturing the same |
| BR112018007748B1 (pt) | 2015-11-03 | 2022-07-26 | Kimberly-Clark Worldwide, Inc. | Produto de tecido de papel, produto de limpeza, e, artigo absorvente de cuidado pessoal |
| CN110023563B (zh) | 2016-12-22 | 2021-02-09 | 金伯利-克拉克环球有限公司 | 用于在泡沫形成过程中重新定向纤维的方法和系统 |
| BR112020007694B1 (pt) | 2017-11-29 | 2022-12-13 | Kimberly-Clark Worldwide, Inc | Método para produzir um substrato multicamada formado por espuma |
| CN112469857B (zh) | 2018-07-25 | 2022-06-17 | 金伯利-克拉克环球有限公司 | 用于制备三维泡沫铺设的非织造物的方法 |
| MX2022006688A (es) * | 2019-12-31 | 2022-07-11 | Kimberly Clark Co | Sistema y proceso de fabricacion a base de espuma. |
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Also Published As
| Publication number | Publication date |
|---|---|
| SE1451172A1 (en) | 2016-04-04 |
| CA2962711A1 (en) | 2016-04-07 |
| EP3201392A4 (en) | 2018-05-16 |
| US20170306561A1 (en) | 2017-10-26 |
| SE539865C2 (en) | 2017-12-27 |
| CA2962711C (en) | 2022-06-07 |
| CN107109792A (zh) | 2017-08-29 |
| BR112017006511B1 (pt) | 2022-03-29 |
| BR112017006511A2 (pt) | 2017-12-19 |
| US10301775B2 (en) | 2019-05-28 |
| PL3201392T3 (pl) | 2019-09-30 |
| WO2016051350A1 (en) | 2016-04-07 |
| ES2733424T3 (es) | 2019-11-29 |
| EP3201392A1 (en) | 2017-08-09 |
| EP3201392B1 (en) | 2019-05-15 |
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