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填充料是生产油毡必用的一种原料,在沥青中加入填充料,能改变沥青性能,提高软化点,增强耐热性、塑性和机械强度,有利改善产品质量,防止油毡受热出现流淌,避免开卷时发生粘结。加入填充料还能节约沥青、降低油毡生产成本。但对填充料也有一定的要求,一般是无机矿物细粉,不影响沥青性能,又不降低指标,对沥青不发生化学变化。生产油毡用沥青填充料必须具备的技术指标如下:
Filler is a kind of raw material that must be used for producing linoleum. Adding filler to asphalt can change asphalt performance, increase softening point, increase heat resistance, plasticity and mechanical strength, improve product quality, prevent linoleum from flowing hot, and avoid unwinding. Bonding occurs. Adding filler can also save asphalt and reduce the cost of linoleum production. However, there is also a certain requirement for the filler, which is generally an inorganic mineral fine powder, which does not affect the performance of the asphalt and does not reduce the index, and does not undergo chemical changes to the asphalt. The technical specifications that must be available for the production of asphalt felt for linoleum are as follows: