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RU2018134118A - Способ изготовления многослойного пленочного полотна - Google Patents

Способ изготовления многослойного пленочного полотна Download PDF

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Publication number
RU2018134118A
RU2018134118A RU2018134118A RU2018134118A RU2018134118A RU 2018134118 A RU2018134118 A RU 2018134118A RU 2018134118 A RU2018134118 A RU 2018134118A RU 2018134118 A RU2018134118 A RU 2018134118A RU 2018134118 A RU2018134118 A RU 2018134118A
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film web
paragraphs
polymer component
mass
melting polymer
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RU2018134118A
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English (en)
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RU2734515C2 (ru
RU2018134118A3 (ru
Inventor
Людвиг БЁРМАНН
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Ркв Се
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Claims (18)

1. Способ изготовления многослойного пленочного полотна из по меньшей мере двух исходных пленочных полотен, состоящих из термопластичного полимерного материала, причем каждое исходное пленочное полотно содержит по меньшей мере один низкоплавкий полимерный компонент и по меньшей мере один высокоплавкий полимерный компонент, где способ включает следующие стадии:
изготовление по меньшей мере двух исходных пленочных полотен посредством экструзии с раздувом, плоскощелевой экструзии или комбинации экструзии с раздувом и плоскощелевой экструзии;
пропускание по меньшей мере двух исходных пленочных полотен до их перехода в частично расплавленное состояние, в котором в каждом исходном пленочном полотне по меньшей мере один низкоплавкий полимерный компонент находится в жидком расплавленном состоянии, а по меньшей мере один высокоплавкий полимерный компонент не находится в жидком расплавленном состоянии, совместно через по меньшей мере один нагревательный валец; и
пропускание многослойного, частично расплавленного пленочного полотна через охлаждаемый межвальцовый зазор.
2. Способ по п. 1, отличающийся тем, что по меньшей мере два исходных пленочных полотна являются одинаковыми или различными.
3. Способ по п. 1 или 2, отличающийся тем, что по меньшей мере два исходных пленочных полотна являются двумя исходными пленочными полотнами, изготовленными посредством экструзии с раздувом, при этом получают раздутый пленочный рукав, этот рукав плоско складывают, при необходимости разделяют с обеих сторон, и оба пленочных полотна по отдельности или совместно направляют к нагревательному вальцу.
4. Способ по любому из пп. 1-3, отличающийся тем, что каждое исходное пленочное полотно содержит от 15 масс. % до 85 масс. % низкоплавкого полимерного компонента и от 85 масс. % до 15 масс. % высокоплавкого полимерного компонента, в пересчете на 100 масс. % низкоплавкого и высокоплавкого полимерных компонентов.
5. Способ по любому из пп. 1-4, отличающийся тем, что каждое исходное пленочное полотно содержит по меньшей мере один полиэтилен в качестве низкоплавкого полимерного компонента и по меньшей мере один полипропилен в качестве высокоплавкого полимерного компонента.
6. Способ по любому из пп. 1-5, отличающийся тем, что каждое исходное пленочное полотно нагревают до температуры, лежащей на от 5°С до 20°С ниже температуры плавления кристаллита по меньшей мере одного высокоплавкого полимерного компонента.
7. Способ по любому из пп. 1-6, отличающийся тем, что вальцы, образующие охлаждаемый межвальцовый зазор приводят в движение с более высокой скоростью, чем скорость по меньшей мере одного нагревательного вальца.
8. Способ по любому из пп. 1-7, отличающийся тем, что многослойное пленочное полотно растягивают между по меньшей мере одним нагревательным вальцом и охлаждаемым межвальцовым зазором, в частности с кратностью растягивания, равной по меньшей мере 1:1,2, предпочтительно - по меньшей мере 1:1,5, более предпочтительно - по меньшей мере 1:2.
9. Способ по любому из пп. 1-8, отличающийся тем, что многослойное пленочное полотно в охлаждаемом межвальцовом зазоре подвергают охлаждению до температуры, лежащей по меньшей мере на от 10°С до 30°С ниже температуры плавления кристаллита по меньшей мере одного низкоплавкого полимерного компонента каждого исходного пленочного полотна.
10. Способ по любому из пп. 1-9, отличающийся тем, что исходные пленочные полотна содержат наполнитель, в частности в количестве, лежащем в диапазоне от 10 масс. % до 90 масс. %, предпочтительно - от 20 масс. % до 80 масс. %, в пересчете на 100 масс. % каждого исходного пленочного полотна.
11. Способ по п. 10, отличающийся тем, что по меньшей мере одно исходное пленочное полотно является микропористым.
12. Способ по любому из пп. 1-11, отличающийся тем, что по меньшей мере одно исходное пленочное полотно в процессе его изготовления растягивают в машинном направлении или в поперечном направлении, или и в машинном, и в поперечном направлениях.
13. Многослойное пленочное полотно, изготовленное способом по любому из пп. 1-12.
14. Многослойное пленочное полотно по п. 13, отличающееся тем, что оно имеет поверхностную плотность, лежащую в диапазоне от 1 г/м2 до 30 г/м2, в частности - от 5 г/м2 до 25 г/м2, предпочтительно - от 7 г/м2 до 20 г/м2, более предпочтительно - от 10 г/м2 до 20 г/м2.
15. Применение многослойного пленочного полотна по п. 13 или 14 в области гигиены или медицины, в частности для изготовления подложек (изнаночных слоев) в подгузниках, непромокаемых наматрасников или женских гигиенических прокладок.
RU2018134118A 2016-03-22 2017-03-22 Способ изготовления многослойного пленочного полотна RU2734515C2 (ru)

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