Personal Property Secured Transactions Act Article 4-1

When work is contributed to, or something is joined or mixed with, the subject property of a personal property secured transaction, the effect of the personal property in securing a claim extends to the work contributed to or the thing joined or mixed with the subject property, to the extent of the original value.
中文原文 動產擔保交易法第4-1條
動產擔保交易之標的物,有加工、附合或混合之情形者,其擔保債權之效力,及於加工物、附合物或混合物。
但以原有價值為限。

English translation for reference only; the Chinese text prevails. Not legal advice.