Dry process paper filter tip and its prepn process
A cigarette filter rod and dry-laid paper technology, which is applied in the fields of e-liquid filter elements, tobacco, and other applications, can solve the problems of reducing filter elasticity, filtration rate, and influence on taste, and achieve good resilience, fullness, firmness, and elasticity Good results
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Embodiment 1
[0013] First, use non-toxic esters or ethers to carry out antistatic treatment on the surface of the hot-melt sheath-core fiber, so that the specific resistance is less than 9×10 8 (Ω·cm). Subsequently, the opened wood pulp fiber and 5% to 65% heat-melting sheath-core fiber are respectively metered and transported and air-laid. The hot-melt sheath-core fiber can choose PE / PP, LPET / PET, or PE / PET, or a mixture of PE / PP and PE / PET. The web-formed paper web is heat-formed without pressure in the forming drying tunnel, and the drying tunnel is in a negative pressure state of 0.98-0.85 atmospheres, so that the dry-laid paper maintains a high bulkiness. Then, spray glue on the formed dry-laid paper, the spraying amount is 3.5% to 7% of the weight of the dry-laid paper, and complete the drying, curing and puffing process at one time. After being shaped by cold air, the grammage is 35g / m 2 ~75g / m 2 , a bulky and highly elastic dry-laid paper with a thickness of 0.8mm to 3.5mm. If ...
Embodiment 2
[0015] The dry-laid paper cigarette filter rod prepared by the method described in Example 1 adopts 35% PE / PP hot-melt sheath-core fiber, or a mixture of PE / PP and PE / PET hot-melt sheath-core fiber , the mixing ratio is: 5% ~ 95% PE / PP and 95% ~ 5% PE / PET, forming a gram weight of 45g / m 2 , Thickness of 1.3mm bulky high elastic dry-laid paper. According to the requirements of the finished product, divide the dry-laid paper into strips with a width of 4 cm, and overlap three layers. Place the three layers of overlapping dry-laid paper on the feeding device of an ordinary filter rod forming machine, and directly wrap the forming paper on the filter rod forming machine to form a rod. The air-laid paper filter rod made has good air permeability, uniform mesh gap, good elasticity, strong resilience, full hand feeling, no shrinkage, hardness of about 89%, and all indicators meet the national standards for filter rods. When the length is 120mm, the suction resistance is 3750pa, and...
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