Micro-breathable plastic film for tobacco packaging and preparation method
A plastic film and tobacco technology, applied in packaging, wrapping paper, transportation and packaging, etc., can solve the problems of cumbersome processing procedures, damage to forest resources, poor ventilation performance, etc., and achieve excellent moisturizing properties, saving forest resources, and environmental protection. Good results
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Embodiment 1
[0029] (1) First lay the non-woven fabric flat, then apply the soap-type rosin glue on the surface of the non-woven fabric, and then level it so that the surface roughness of the soap-type rosin glue layer is ±0.002mm; the non-woven fabric is polyester ; Soap-type rosin gum is rosin sodium soap gum, and the amount of free rosin is 32%;
[0030] (2) Apply an adhesive on the soap-type rosin adhesive layer, and bond and compound the PTFE film layer to obtain a composite film precursor; the adhesive is a silicone pressure-sensitive adhesive with a solid content of 4%; compound In the film precursor, the thickness of each layer is: non-woven fabric layer 4mil, soap type rosin glue layer 2mil, viscose layer 0.8mil, PTFE film layer 4mil;
[0031] (3) The composite film precursor prepared in step (2) is rolled by a cold roll to form air-permeable micropores, and a micro-breathable plastic film for tobacco packaging is obtained; the pressure of the cold roll is 0.7MPa, and the rolling ...
Embodiment 2
[0034] (1) First lay the non-woven fabric flat, then apply the soap-type rosin glue on the surface of the non-woven fabric, and then level it so that the surface roughness of the soap-type rosin glue layer is ±0.001mm; the non-woven fabric is polypropylene ; Soap-type rosin gum is rosin calcium soap gum, and the amount of free rosin is 25%;
[0035] (2) Apply a binder on the soap-type rosin glue layer, and bond and compound the PTFE film layer to obtain a composite film precursor; the binder is a silicone pressure-sensitive adhesive with a solid content of 30%; compound In the film precursor, the thickness of each layer is: non-woven fabric layer 3mil, soap type rosin glue layer 2mil, viscose layer 0.5mil, PTFE film layer 3mil;
[0036] (3) The composite film precursor prepared in step (2) is rolled by a cold roll to form air-permeable micropores, and a micro-breathable plastic film for tobacco packaging is obtained; the pressure of the cold roll is 0.3 MPa, and the rolling li...
Embodiment 3
[0039] (1) First spread the non-woven fabric flat, then apply the soap-type rosin glue on the surface of the non-woven fabric, and then level it so that the surface roughness of the soap-type rosin glue layer is ±0.002mm; the non-woven fabric is nylon ; Soap-type rosin gum is rosin manganese soap gum, and the amount of free rosin is 40%;
[0040](2) Apply a binder on the soap-type rosin glue layer, and bond and compound the PTFE film layer to obtain a composite film precursor; the binder is a silicone pressure-sensitive adhesive with a solid content of 50%; compound In the film precursor, the thickness of each layer is: non-woven fabric layer 5mil, soap type rosin glue layer 3mil, viscose layer 1mil, PTFE film layer 5mil;
[0041] (3) The composite film precursor prepared in step (2) is rolled by a cold roll to form air-permeable micropores, and a micro-breathable plastic film for tobacco packaging is obtained; the pressure of the cold roll is 1.2MPa, and the rolling line The...
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