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A kind of hot melt adhesive suitable for heat exchanger gap sealing and production method thereof
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A technology of hot melt adhesive and heat exchanger, applied in the direction of adhesives, non-polymer adhesive additives, adhesive types, etc., to achieve the effects of good mildew resistance, high peel strength and stable structure
Active Publication Date: 2021-03-16
广东邦达实业有限公司
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Problems solved by technology
However, the current common hot melt adhesives cannot meet such requirements, and there is an urgent need for improvement.
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Embodiment 1
[0013] A hot melt adhesive suitable for heat exchanger gap sealing, the mass ratio composition of raw materials is: 49% amorphous α-olefin copolymer APAO (Ring and Ball softening point 135±5°C), 6.5% styrene- Butadiene-styrene block copolymer SBS (melt index 3.0 ± 0.5g / min), 26% hydrogenated C5 petroleum resin, 18% nano-sized aluminum hydroxide, 0.5% antioxidant 1010.
[0014] A production method of hot melt adhesive suitable for heat exchanger gap sealing:
[0015] ①. Take the antioxidant 1010, nano-sized aluminum hydroxide and hydrogenated C5 petroleum resin in the composition of the above formula by mass ratio as combination A, and use a high-speed mixer to mix them evenly.
[0016] ②. Take APAO and SBS in the mass ratio composition of the above formula together as combination B, and use an internal mixer to knead evenly.
[0017] ③. Use an internal mixer to further knead the above-mentioned combination A and combination B evenly, and control the mixing temperature to 125±...
Embodiment 2
[0022] A hot melt adhesive suitable for heat exchanger gap sealing, the mass ratio composition of raw materials is: 55% APAO (Ring and Ball Softening Point 135±5°C), 9.5% SBS (melt index 3.0±0.5g / min), 20 %Hydrogenated C5 petroleum resin, 15% nano aluminum hydroxide, 0.5% antioxidant 1010.
[0023] A production method of hot melt adhesive suitable for heat exchanger gap sealing is:
[0024] ①. Take the antioxidant 1010, nano-sized aluminum hydroxide and hydrogenated C5 petroleum resin in the composition of the above formula by mass ratio as combination A, and use a high-speed mixer to mix them evenly.
[0025] ②. Take APAO and SBS in the mass ratio composition of the above formula together as combination B, and use an internal mixer to knead evenly.
[0026] ③. Use an internal mixer to further knead the above-mentioned combination A and combination B evenly, and control the mixing temperature to 125±5°C.
[0027] ④. Extrude the homogeneous mixture of combination A and combin...
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Abstract
The invention discloses a hot melt adhesive applicable to heat exchanger seam sealing and a production method of the hot melt adhesive. The production method comprises the following steps: (1) takingan antioxidant with a raw material mass ratio of 0.2-0.5%, nano-grade aluminum hydroxide of 15-30% and hydrogenated petroleum resin of 10-30% as a component A, and mixing by using a high-speed mixingmachine; (2) taking an amorphous state alpha-olefin copolymer with a raw material mass ratio of 25-65% and a styrene-butadiene-styrene segmented copolymer of 5-20% as a component B, and uniformly mixing and smelting by using an internal mixer; (3) mixing the component A with the component B, and uniformly mixing and smelting by using the internal mixer; (4) extruding the mixture obtained in the step (3) by using a double-screw extruder, cooling and pelletizing to obtain a finished product. By adopting the hot melt adhesive, requirements on high adhesive strength and properties such as high temperature resistance, low temperature resistance, water resistance, mold resistance, flame retardancy and the like of heat exchanger seam sealing cam be met, and the realization of intelligence and automation in the heat exchanger seam sealing process can be facilitated.
Description
technical field [0001] The invention relates to the technical field of hot-melt adhesives, in particular to hot-melt adhesives used for sealing gaps in heat exchangers. Background technique [0002] With the process of industrial automation, the production of industrial products is increasingly moving towards automation and intelligence, and more operating positions on the production line are replaced by industrial robots. The bonding and sealing steps in the assembly process can be performed by industrial robots equipped with hot-melt glue guns. The melt sizing characteristics of hot melt adhesives provide great convenience for the automation of bonding and sealing construction in the assembly process. At the same time, hot melt adhesives are also solvent-free, pollution-free, safe and environmentally friendly. [0003] The air conditioner heat exchanger in the prior art includes at least two connected heat exchanger groups, and the gap between the adjacent two heat exchan...
Claims
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