SU240996A1 - METHOD OF OBTAINING POLYMERIC POROUS MATERIAL BASED ON Fluoroplastic-4D - Google Patents

METHOD OF OBTAINING POLYMERIC POROUS MATERIAL BASED ON Fluoroplastic-4D

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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
Application number
SU1228450A
Other languages
Russian (ru)
Inventor
Д. Д. Чегодаев А. А. Кузнецова Ю. Ф. Дуничев Л. В. Черешкевич
О. Г. Совпель
Publication of SU240996A1 publication Critical patent/SU240996A1/en

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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.

SU1228450A METHOD OF OBTAINING POLYMERIC POROUS MATERIAL BASED ON Fluoroplastic-4D SU240996A1 (en)

Publications (1)

Publication Number Publication Date
SU240996A1 true SU240996A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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