Method for determining manufacturing technological conditions of standard varicosity membranes by testing oil contents of varicosity membranes

Abstract

The invention discloses a method for determining manufacturing technological conditions of standard varicosity membranes by testing the oil contents of the varicosity membranes. The method comprises the steps that 1, varicosity membranes of different batches are selected as samples to be extracted and dried for testing the oil contents of the varicosity membranes; 2, contrastive analysis is performed on the tested oil content data by combining different technological conditions such as deoiling oven temperature and the varicosity membrane thickness adopted by the varicosity membranes of different batches; 3, the varicosity membrane of the certain batch with the low oil content and the small difference between the technological conditions and original technological conditions is selected, infrared spectrum detection is performed on a carbon tetrachloride extract solution of the varicosity product manufactured through the membrane of the batch, and if no hydrocarbon substance is detected, the manufacturing technological conditions of the membrane of the batch are determined as the manufacturing technological conditions of the standard varicosity membrane. The method can well determine the setting temperature at which the amount of substance containing hydrocarbon of the varicosity product which cannot be detected by an infrared spectrum is manufactured by a deoiling oven so as to ensure that the final product is qualified in quality.

Description

technical field [0001] The invention belongs to the technical field of medical product material production, and relates to a method for determining the production process conditions of a standard expanded membrane by testing the oil content of the expanded membrane. Background technique [0002] The manufacturing process of expanded polytetrafluoroethylene diaphragm (expanded diaphragm for short) is generally: mixing polytetrafluoroethylene with D80 solvent oil, extrusion molding, deoiling oven drying, calendering stretching, heat treatment; and, in calendering During the stretching process, a film of the required thickness is obtained by setting a certain distance between the calender rollers. The expanded polytetrafluoroethylene diaphragm prepared above is then processed into expanded polytetrafluoroethylene implant products (referred to as expanded products) after bonding and curing processes. [0003] According to the technical requirements of expanded polytetrafluoroet...

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Problems solved by technology

[0005] The existing process conditions for the production of bulky diaphragms are that the drying temperature of the deoiling oven is 170-230°C, and the thickness of the diaphragm is 1mm. After the expanded product is made, the carbon tetrachloride extract of the expanded product is sent out for infrared spectrum testing. The test result is unqualified, and hydrocarbons are detected.

At present, there is no good way to determine the set temperature of the deoiling oven so that the amount of hydrocarbon-containing substances in the final expanded product cannot be detected by infrared spectroscopy, so as to ensure that the final produced The quality of bulked products is qualified

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