Preparation method of gel-like adhesive for pp brush filaments
An adhesive and gel-like technology, applied in the direction of adhesives, etc., can solve the problems of restricting the high elasticity of brush filaments, not being able to adapt to the requirements of cold area operations, adhesive toughness, and strength reduction, etc., to achieve good resistance to environmental stress Crackability, high rigidity, and excellent rigidity
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Embodiment 1
[0019] At room temperature of 16°C, put 35kg of polypropylene wire drawing powder, 25kg of linear low density polyethylene, 25kg of linear low density polyethylene primary recycled material, and 15kg of chlorinated polypropylene into a high-speed mixer with a rotation speed of 100rpm. , mixed for 5 minutes, and then added to a twin-screw extruder. The temperature of each zone of the extruder is: 175°C in the first zone, 185°C in the second zone, 190°C in the third zone, and 195°C in the die head, and melt to obtain a gel-like adhesive.
Embodiment 2
[0021] At a room temperature of 45°C, put 50kg of polypropylene wire drawing powder, 20kg of linear low density polyethylene, 20kg of linear low density polyethylene primary recycled material, and 10kg of chlorinated polypropylene into a high-speed mixer with a rotation speed of 100rpm. , mixed for 5 minutes, and then added to a twin-screw extruder. The temperature of each zone of the extruder is: 175°C in the first zone, 185°C in the second zone, 190°C in the third zone, and 195°C in the die head, and melt to obtain a gel-like adhesive.
Embodiment 3
[0023] At a room temperature of 30°C, put 42kg of polypropylene wire drawing powder, 23kg of linear low density polyethylene, 22kg of linear low density polyethylene primary recycled material, and 13kg of chlorinated polypropylene into a high-speed mixer with a rotation speed of 100rpm. , mixed for 5 minutes, and then added to a twin-screw extruder. The temperature of each zone of the extruder is: 175°C in the first zone, 185°C in the second zone, 190°C in the third zone, and 195°C in the die head, and melt to obtain a gel-like adhesive.
[0024] For the gel-like adhesives prepared in the above three examples, the optimal bonding time after exiting the die head is extended to 3 minutes, and the brush filaments bonded during this period of time do not crack or break after reprocessing, while ordinary bonding The agent can only implement optimal bonding within 1.5 minutes after extrusion. The PP brush filaments are baked at 120°C before bonding, and the gel-like adhesive is bond...
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