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                聚氨酯密封膠粘接強度等力學指標的改進

                • 發布時間 : 2023-10-28 19:53:23
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                (Summary description)Customized SILICONE STRUCTURAL SEALANT from China manufacturer refers to the adhesive with high strength, can bear large load, aging resistance, fatigue resistance and corrosion resistance, and has stable performance within the expected life. It is suitable for bearing the bonding of strong structural parts. Non structural adhesive has low strength and poor durability. It can only be used for bonding, sealing and fixing of ordinary and temporary properties, and cannot be used for structural adhesive bonding. NEUTRAL SILICONE WETHERPROOF SEALANT from China manufacturer is a structural adhesive with waterproof function. Silicone glue refers to the adhesive based on silicone rubber. According to different functions, it can be divided into structural adhesive, potting adhesive, sealant, thermal conductive adhesive, flame retardant adhesive and so on.

                聚氨酯密封膠粘接強度等力學指標的改進

                (Summary description)Customized SILICONE STRUCTURAL SEALANT from China manufacturer refers to the adhesive with high strength, can bear large load, aging resistance, fatigue resistance and corrosion resistance, and has stable performance within the expected life. It is suitable for bearing the bonding of strong structural parts. Non structural adhesive has low strength and poor durability. It can only be used for bonding, sealing and fixing of ordinary and temporary properties, and cannot be used for structural adhesive bonding. NEUTRAL SILICONE WETHERPROOF SEALANT from China manufacturer is a structural adhesive with waterproof function. Silicone glue refers to the adhesive based on silicone rubber. According to different functions, it can be divided into structural adhesive, potting adhesive, sealant, thermal conductive adhesive, flame retardant adhesive and so on.

                • 發布時間 : 2023-10-28 19:53:23
                • Views:
                Information

                       不同的二異氰酸酷,不同的填料量對聚氨酯密封膠的枯接強度等力學指標都有一定影響,但主要影響來自聚醚多元醇。改變預聚物中三官能度多元醇與二官能度多元醇的比例,調整預聚物中一NCO的含量指標在密封膠中的配比,可在較大范圍內提高聚氨酯密封膠的拉伸強度、剪切強度、撕裂強度等指標,但斷裂伸長率也稍受影響。需特別指出的是,預聚物的一NCO含量過高會影響聚氨酯密封膠的貯存穩定性,涂覆后如果環境溫度較高、濕過度大,在固化過程中會有微細氣泡產生,反而影響這些力學指標。另外不同分子量的聚醚多元醇,不同種類的聚醚多元醇對這些指標也有較大影響。www.qiquanonline.com

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