Low-density and high-extrusion-rate PVC fireproof sealing strip and preparation method thereof
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A technology of extrusion rate and low density, applied in the field of low density, high extrusion rate PVC fireproof sealing strip and its preparation, can solve the problems of increasing cost, reducing the strength of sealing strip and fireproof ability
Pending Publication Date: 2021-07-23
湖北合扬科技有限公司
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Problems solved by technology
[0002] At present, in order to reduce the self-weight of the sealing strips on the market, they reduce their own density by foaming or adding PVC resin, PVC recycled materials, etc., but adding PVC recycled materials will reduce the strength and fire resistance of the sealing strip to a certain extent, and increase PVC. New materials will greatly increase the cost
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Embodiment 1
[0017] The formula is calculated by weight percentage, SG-5 polyvinyl chloride resin powder 25%, 80 mesh expanded graphite 25%, light calcium carbonate 16.5%, plasticizer 27%, heat stabilizer 1%, flame retardant 4.5% and Processing aid 1%, 200-500 rev / min mixing and stirring for 3-10 minutes, reduce to low speed and stir for 1-5 minutes, after granulation, extrusion molding, cooling, cutting and sticking double-sided adhesive tape to obtain PVC Finished flame retardant sealing strip.
Embodiment 2
[0019] The formula is calculated by weight percentage, SG-5 polyvinyl chloride resin powder 25%, 80 mesh expanded graphite 25%, light calcium carbonate 13.5%, perlite 3%, plasticizer 27%, heat stabilizer 1%, flame retardant 4.5% additive and 1% processing aid, mix and shake at 200-500 rpm for 3-10 minutes, then reduce to low speed and stir for 1-5 minutes, after granulation, extrusion molding, cooling, cutting and pasting double-sided After gluing, the finished PVC flame-retardant sealing strip is obtained.
Embodiment 3
[0021] The formula is calculated by weight percentage, SG-5 polyvinyl chloride resin powder 25%, 80 mesh expanded graphite 25%, light calcium carbonate 9%, perlite 3%, AC foaming agent 1.5%, cell regulator 3% , 27% plasticizer, 1% heat stabilizer, 4.5% flame retardant and 1% processing aid, 200-500 rpm mixing and stirring for 3-10 minutes, then reduce to low speed and stir for 1-5 minutes, after After granulation, extrusion molding, cooling, cutting and sticking double-sided tape, the finished PVC flame-retardant sealing strip is obtained.
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Abstract
The invention discloses a low-density and high-extrusion-rate PVC fireproof sealing strip, which comprises the following components in percentage by mass: 10-40% of polyvinyl chloride resin powder, 10-40% of expanded graphite, 5-30% of filler, 2-10% of light filler, 0.5-5% of a foaming agent, 0.5-5% of a cell regulator, 10-40% of a plasticizer, 0.5-5% of a heat stabilizer, 2-6% of a flame retardant and 0.5-5% of a processing aid. According to the invention, the lightweight fireproof raw material is utilized to replace part of the filler, and the foaming agent and the cell regulator are added, so that the density of the PVC sealing strip is reduced on the premise of not increasing the cost and not losing the performance, the sealing strip is prevented from falling off due to too high self weight in the use process, and the use condition of the PVC sealing strip is reduced.
Description
technical field [0001] The invention belongs to the field of fireproof sealing strips, in particular to a PVC fireproof sealing strip with low density and high extrusion rate and a preparation method thereof. Background technique [0002] At present, in order to reduce the self-weight of the sealing strips on the market, they reduce their own density by foaming or adding PVC resin, PVC recycled materials, etc., but adding PVC recycled materials will reduce the strength and fire resistance of the sealing strip to a certain extent, and increase PVC. New materials will greatly increase the cost. Contents of the invention [0003] The purpose of the present invention is to provide a low density, high extrusion rate PVC fireproof sealing strip and its preparation method, in order to solve the problems in the background technology. [0004] The more specific technical scheme of the present invention is as follows: [0005] A PVC fireproof sealing strip with low density and hig...
Claims
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Application Information
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