SU240996A1 - METHOD OF OBTAINING POLYMERIC POROUS MATERIAL BASED ON Fluoroplastic-4D - Google Patents
METHOD OF OBTAINING POLYMERIC POROUS MATERIAL BASED ON Fluoroplastic-4DInfo
- Publication number
- SU240996A1 SU240996A1 SU1228450A SU1228450A SU240996A1 SU 240996 A1 SU240996 A1 SU 240996A1 SU 1228450 A SU1228450 A SU 1228450A SU 1228450 A SU1228450 A SU 1228450A SU 240996 A1 SU240996 A1 SU 240996A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- fluoroplastic
- porous material
- material based
- polymeric porous
- obtaining polymeric
- Prior art date
Links
- 239000011148 porous material Substances 0.000 title 1
- 239000000463 material Substances 0.000 description 9
- 238000001035 drying Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 239000004604 Blowing Agent Substances 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000009998 heat setting Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
Description
Известен способ получени пористого полимерйого материала путем экструзии композиции из фтОропласта-4Д и легколетучего порообразовател , например бензина, с последующей сушкой и термообработкой.A method of producing a porous polymer material is known by extruding a composition from phOroplast-4D and a volatile blowing agent, for example gasoline, followed by drying and heat treatment.
Предлагаемый способ отличаетс от известного тем, что материал после сушки подвергают выт жке на 100-400% от первоначальной длины. Это позвол ет получать материал с повышенной пористостью от 60 до 85% при сохранении хороших физико-механических свойств.The proposed method differs from the known one in that the material after drying is stretched to 100-400% of the original length. This makes it possible to obtain material with increased porosity from 60 to 85%, while maintaining good physical and mechanical properties.
Варьиру степень выт жки, можно получать материал любой заданной плотности от 0,34 до I г/смз.By varying the degree of stretching, it is possible to obtain material of any given density from 0.34 to I g / cm 3.
Пример 1. 80-82 ч. (части) порошка фторопласта-4Д смешивают с 20-18 ч. бензина . Из получаемой композиции (смазанной пасты) изготовл ют таблетку при давлении до 35 кг/см, которую помеш.ают в матрицу поршневого экструдера. Экструзию ведут при 25°С и получают стержень любой формы, сечени и любого размера. После высушивани от бензина стержень нагревают до 150-300°С и выт гивают на 100-300% от первоначальной длины. Степень выт жки зависит от нагрева стержн - рекомендуетс нагрев до 150°С при выт жке на 100% и нагрев доExample 1. 80-82 parts (parts) of fluoroplast-4D powder are mixed from 20-18 parts of gasoline. A tablet is prepared from the resulting composition (lubricated paste) at a pressure of up to 35 kg / cm, which is placed in the matrix of the piston extruder. The extrusion is carried out at 25 ° C and a rod of any shape, cross section and any size is obtained. After drying from gasoline, the core is heated to 150-300 ° C and stretched to 100-300% of the original length. The degree of stretching depends on the heating of the rod — it is recommended to heat to 150 ° C with a stretching of 100% and heating to
SOO°C при выт жке на 300%. Получают материал с пористостью от 62% до 81%.SOO ° C at 300% stretching. A material with a porosity of 62% to 81% is obtained.
Пример 2. Композицию, приготовленную но примеру 1, экструдируют через мундштукExample 2. The composition prepared in Example 1 is extruded through a mouthpiece.
переменного сечени , вначале (по ходу пасты ) меньшего сечени , а затем большего на 25-50%. Получаемый стержень выт гивают при нагреве до 100-300°С на 250-400% от первоначальной длины. Получают материалvariable cross section, first (along the paste) smaller section, and then more by 25-50%. The resulting rod is drawn when heated to 100-300 ° C at 250-400% of the original length. Receive material
с пористостью от 77% ДО 85%.with porosity from 77% up to 85%.
Пример 3. Стерл ень, получаемый по примеру 2, выт гивают при комнатной температуре на 200-250%, наматывают плотно на катушку и прогревают на катушке дл Example 3. The sterilum obtained according to example 2 is drawn at room temperature by 200-250%, wound tightly on the coil and heated on a coil for
термофиксацпи до 200°С. Получают материал с пористостью около 75%.heat setting up to 200 ° C. A material with a porosity of about 75% is obtained.
Пористые стержни и другие профили обладают очень большой м гкостью и гибкостью при достаточно высокой прочности и могутPorous rods and other profiles have very high softness and flexibility with sufficiently high strength and can
примен тьс дл различных целей, где необходимо иметь пористый фторопласт-4Д, например , в качестве материала дл теплоизол ции или дл создани электрической изол ции с особо низкой диэлектрической проницаемостью . 3 летучего порообразовател методом экструзии с последующей сушкой и термообработкой , отличающийс тем, что, с целью получе4 ни материала с большей пористостью и хорошими физико-механическими свойствами, материал иосле сушки подвергают выт жке.used for various purposes where it is necessary to have porous fluoroplast-4D, for example, as a material for thermal insulation or for creating electrical insulation with a particularly low dielectric constant. 3 volatile blowing agent by extrusion, followed by drying and heat treatment, characterized in that, in order to obtain4 a material with greater porosity and good physicomechanical properties, the material and after drying is subjected to stretching.
Publications (1)
Publication Number | Publication Date |
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SU240996A1 true SU240996A1 (en) |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4096227A (en) * | 1973-07-03 | 1978-06-20 | W. L. Gore & Associates, Inc. | Process for producing filled porous PTFE products |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4096227A (en) * | 1973-07-03 | 1978-06-20 | W. L. Gore & Associates, Inc. | Process for producing filled porous PTFE products |
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