Composite profile made from waste dry film and preparation method thereof
A composite profile and dry film technology, applied in the field of composite profiles, can solve problems such as environmental pollution, and achieve the effects of reducing solid waste discharge, realizing resource utilization, and simple processing equipment
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Embodiment 1
[0036] 1. Preparation of dry film fines
[0037]Use 0.1mol / L NaOH solution to carry out alkali treatment (alkali boiling) on the waste dry film, wherein the mass ratio of NaOH solution to waste dry film is 2:1, and the temperature of the alkali treatment is controlled at 90°C, and the time is 120min. An alkaline treatment solution is obtained.
[0038] The above-mentioned alkali treatment liquid is filtered, and the filtrate is collected to obtain an alkaline filtrate containing a small amount of colloid, which is combined into a NaOH solution for reuse; at the same time, the filter residue is collected to obtain a water-containing dry film filter residue, which is ventilated and dried. The drying temperature is controlled to be 100° C. and the drying time is 120 minutes to obtain a dry film dispersion slag.
[0039] The above dry film dispersion slag is crushed and sieved to obtain dry film fines with an average particle size of 120 mesh and a water content of <1%.
[004...
Embodiment 2
[0046] 1. Preparation of dry film fines
[0047] Use 0.2mol / L NaOH solution to carry out alkali treatment (alkali boiling) on the waste dry film, wherein the mass ratio of NaOH solution to the waste dry film is 2:1, and the temperature of the alkali treatment is controlled at 90°C and the time is 60min. An alkaline treatment solution is obtained.
[0048] The above-mentioned alkali treatment liquid is filtered, and the filtrate is collected to obtain an alkaline filtrate containing a small amount of colloid, which is combined into a NaOH solution for reuse; at the same time, the filter residue is collected to obtain a water-containing dry film filter residue, which is ventilated and dried. The drying temperature is controlled to be 105° C. and the drying time is 100 min to obtain a dry film dispersion slag.
[0049] The above dry film dispersion slag is crushed and sieved to obtain dry film fines with an average particle size of 130 mesh and a water content of <1%.
[0050...
Embodiment 3
[0056] 1. Preparation of dry film fines
[0057] Use 0.3mol / L NaOH solution to carry out alkali treatment (alkali boiling) on the waste dry film, wherein the mass ratio of NaOH solution to waste dry film is 3:1, and control the temperature of alkali treatment to 90°C for 30 minutes, An alkaline treatment solution is obtained.
[0058] The above-mentioned alkali treatment liquid is filtered, and the filtrate is collected to obtain an alkaline filtrate containing a small amount of colloid, which is combined into a NaOH solution for reuse; at the same time, the filter residue is collected to obtain a water-containing dry film filter residue, which is ventilated and dried. The drying temperature is controlled to be 110° C., and the drying time is 80 minutes to obtain a dry film dispersion slag.
[0059] The above dry film dispersion slag is crushed and sieved to obtain dry film fines with an average particle size of 110 mesh and a water content of <1%.
[0060] The above-menti...
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