Preparation method for standard sealant test piece

Abstract

The invention relates to a preparation method for a test piece. According to a technical scheme in the invention, a preparation method for a standard sealant test piece comprises the following steps: placing a sealant between two anti-sticking films; putting the sealant together with the anti-sticking films in dies; stacking the dies containing the sealant and the anti-sticking films layer upon layer, wherein a steel cover plate is put on a top, and edges of the dies are totally aligned with edges of the cover plate; pressurizing the stacked dies in a press and after the sealant overflows from the edges of the dies, carrying out pressure maintaining until the sealant is nonstick; and sulfurizing a die pressing test piece under standard conditions until the test piece is nonstick, relieving pressure, taking out the test piece, peeling the anti-sticking films and placing the test piece in an open environment. According to the invention, the sealant is placed between the two anti-sticking films, and after the test piece is sulfurized in a standard environment for 24 h, the anti-sticking films can be easily peeled; in subsequent accelerated sulfuration, the surface of the test piece is directly exposed in the air, solvents in the test piece can easily volatilize, thereby realizing complete sulfuration, and thus, the high quality standard test piece can be prepared.

Description

technical field [0001] The invention relates to a preparation method of a test piece, in particular to a preparation method of a sealant standard test piece. Background technique [0002] In the engineering test of new materials, such as sealants, it is necessary to prepare test pieces of new materials. The production of existing test pieces is realized through a set of molds, which include: plastic molds, presses, etc. Wherein the plastic mold is injection molded by polypropylene plastic. like figure 1 As shown, the production process is as follows: the sealant 1 is mixed and filled into the plastic mold 2, and the filled molds are stacked. The peripheries of the stacked molds should be completely aligned, and they are sent to the press under standard conditions. Remove the test piece when pressure is applied until it does not stick to the mold. [0003] Due to the long natural vulcanization period of the sealant, in the actual scientific research and production, after t...

AI Technical Summary

Problems solved by technology

[0003] Due to the long natural vulcanization period of the sealant, in the actual scientific research and production, after the sealant is mixed, filled, and pressurized, it must continue to accelerate the vulcanization after 24 hours of vulcanization in the standard environment, and the test piece made of the plastic mold cannot be completely taken out at this time. In order to ensure the integrity of the test piece, the mold must be used for accelerated vulcanization. Because the mold is closed and sealed, the solvent of the test piece is not easy to volatilize during the vulcanization process, resulting in incomplete vulcanization and affecting the quality of the test piece.

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