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双向拉伸聚对苯二甲酸乙二醇(BOPET)覆膜金属板材在奶粉罐、熟食罐头、化学品罐等领域有重要的应用,但是BOPET薄膜与金属复合过程中需要使用胶粘剂,存在双酚A等有害物质析出的安全隐患.针对此问题,设计开发了无需胶粘剂的金属复合用BOPET多层共挤薄膜.通过薄膜总体结构设计、金属复合层分子结构设计、芯层分子结构设计以及成型工艺优化,最终成功研制出宽幅金属复合用BOPET薄膜,具有无需胶粘剂,粘接牢度高,耐冲击等特点.金属复合用BOPET薄膜的成功研发,不仅推动了BOPET薄膜行业的技术进步,而且还能促进国内金属包装行业的发展. 相似文献
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日本希爱化成股份有限公司(C.I.KASEICO.,LTD.)的聚烯烃五层共挤防老化防流滴防雾涂覆大棚膜(以下简称农用PO涂覆膜),即金裕农牌农用聚烯烃(PO)涂覆膜。该膜具有持久的防老化防流滴防雾等性能,是当今世界技术最先进的一种棚膜。1关键技术1.1树脂选定技术为了满足农用PO涂覆膜的使用性能要求(即:强度、柔软性、保温性、透明性、尺寸稳定性、加工稳定性、其他性能等),采用了乙烯-醋酸乙烯共聚 相似文献
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通过粘结性能实验研究了表面处理方法对PET薄膜/紫外光固化涂层体系粘接性能的影响,结果表明:表面处理提高了PET薄膜/涂层体系粘接强度。研究了PET表面处理对PET表面性能如表面形貌、光泽度(粗糙度)、表面张力、表面官能团含量的影响,结果表明:PET薄膜经电晕处理后,其表面粗糙度有增大的倾向,而涂层处理对PET薄膜表面粗糙度无影响;经电晕处理和底涂处理后,PET薄膜表面张力均有增加,底涂处理提高PET薄膜表面张力的幅度更大。研究了PET薄膜表面性能与剪切强度的关系,发现PET薄膜/涂层粘接体系剪切强度τ与PET薄膜表面张力γ具有线性关系。 相似文献
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醋酸乙烯与丙烯酸酯互穿网络共聚乳液的研制 总被引:3,自引:0,他引:3
介绍了一种可生物降解的醋酸乙烯与丙烯酸酯互穿网络共聚乳液 ,采用此法制备的产品的耐沸水性、耐油性等性能很好 ,可以用作食品包装材料的涂层。 相似文献
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通过研究芳纶纤维表面涂覆层的组成与涂覆层胶膜力学性能的关系,探讨了影响芳纶纤维涂覆层力学性能的因素,提出了适于芳纶纤维表面处理的间苯二酚甲醛胶乳(RFL)处理剂配方,并讨论了环氧树脂乳液、聚氨酯乳液和丙烯酸酯乳液对RFL胶膜的性能影响。 相似文献
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A method was developed and optimised for the emulsification of a conventional short oil alkyd resin which was solid at room temperature. The method was based on the emulsion inversion point (EIP) method whereby hot water (90°C) was added to molten alkyd resin (90°C) containing the emulsifier. Under slow mixing and addition of water, a point was reached where the emulsion instantaneously phase inverted from a water in oil emulsion (W/O) to an oil in water emulsion (O/W). Using optimum conditions, emulsions with droplet of diameters less than 0.8 μm were obtained. The drying and film formation of long oil alkyd emulsions were investigated with emphasis on loss of dry upon storage. The main reason for loss of dry was adsorption of the cobalt (drier) on pigment surfaces as a precipitated hydroxide. Titanium dioxides with alumina surface treatment and organic pigments were most detrimental to drying. Acrylate- and phosphate-based dispersants also deactivated cobalt presumably due to complexation and precipitation of cobalt. Emulsions prepared with an emulsifiable cobalt drier containing 2,2′-bipyridyl (complexing agent for cobalt) showed the best resistance to loss of dry. Films formed from the emulsions showed that surfactant migrated to the film surface which when washed with water leaves holes or pits in film. The pits were arranged in a hexagonal pattern, characteristic of Bénard cells which form due to interfacial tension gradients generated in the film during evaporation of water. 相似文献
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采用甲苯二异氰酸酯(TDI)、聚乙二醇(PEG)、二羟甲基丙酸(DMPA)和环氧树脂合成了环氧改性水性聚氨酯乳液。该乳液由于含有不饱和双键而具有感光性能,故可用作水性紫外光固化涂料或胶粘剂的预聚物。探讨了环氧丙烯酸酯(EB)和亲水扩链剂(DMPA)的添加量对涂料和涂膜性能的影响以及光引发剂用量、中和度对光固化涂料转化率的影响。结果表明,随着EB用量的增大,涂膜的硬度、耐水性、耐溶剂性及力学性能增强,但乳液外观和稳定性变差,故适宜的环氧树脂添加量为10%;随着DMPA用量的增加,涂膜硬度、强度提高,而断裂伸长率降低,耐水性变差,故DMPA用量在6%~8%范围为宜;光固化转化率随着中和度的提高而加快,适宜的引发剂用量为3%。本品的缺点是耐汽油性不够理想。 相似文献
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With the goal of developing a waterborne coating material that prevents staining, organic-inorganic composites prepared from
colloidal silica and two types of acrylic resin emulsions were investigated as exterior coatings. conventional acrylic resin
emulsion and organic silane hybridized acrylic resin emulsion prepared by emulsion polymerization were mixed with colloidal
silica to form organic-inorganic comiposite films. The addition of colloidal silica to emulsions yielded films with higher
hydrophilicities, as indicated by lower water contact angles for these films in comparison to films without colloidal silica.
The water contact angles of organic silane hybridized acrylic resin emulsion/colloidal silica films were lower than those
of acrylic resin emulsion/colloidal silica films. Composite films containing colloidal silica particles smaller than 100 nm
in diameter showed high hydrophilicities. Observations of the dispersed state of colloidal silicaparticles in organic-inorganic
composite films by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) demonstrated that colloidal
silica particles were densely aggregated on the film surface. Outdoor exposure tests of the coating materials prepared from
organic silane hybridized acrylic resin and colloidal silica particles with diameters of 7.5 nm showed excellent stain resistance. 相似文献
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环氧改性含磷苯丙防锈乳液的合成 总被引:3,自引:0,他引:3
采用常规乳液聚合方法,以环氧树脂改性含有磷酸酯功能单体的苯丙乳液来制备水性防锈乳液。苯乙烯(St)、丙烯酸丁酯(BA)等为共聚单体,引入环氧树脂及具有抗闪蚀功能的磷酸酯功能单体,考察了乳化剂、引发剂、环氧树脂、磷酸酯单体不同用量对乳液及其漆膜的影响,并对乳液的粒径、固含量及漆膜的耐盐水性、附着力等性能进行测试,逐步优化聚合工艺来合成具有高效防锈的新型环氧防锈乳液。研究表明,乳化剂用量、引发剂用量、环氧树脂用量、磷酸酯单体用量分别为单体总量的1.5%、0.6%、7%、3%时,可制得性能较好的水性环氧改性含磷苯丙防锈乳液。 相似文献
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以丙烯酸酯类为主要单体,环氧树脂和有机硅大分子乳液为改性剂,R303为主要乳化剂,通过乳液聚合方法合成了耐指纹涂料用聚合物乳液成膜物,讨论了乳化剂、环氧树脂和有机硅对乳液及涂膜性能的影响。结果表明,采用阳/非离子复合乳化体系可以制得酸性环境下使用的聚合物乳液,涂膜烘烤过程中活泼的环氧基团与其它基团的交联会大幅度提高涂膜的耐腐蚀性和硬度,有机硅参与聚和后会进一步改善涂层的耐水耐腐蚀性,当m(R303)∶m(OP-10)为3∶1,E-51质量分数为10%,乙烯基有机硅乳液质量分数为5%时,合成的乳液成膜物有较好的综合性能。 相似文献
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有机硅改性聚酯的合成及其粉末涂料的性能 总被引:5,自引:0,他引:5
利用有机硅中间体合成了有机硅改性聚酯树脂。通过IR、GPC、SEM等分析了改性聚酯的结构与形态 ,用电子探针分析了改性聚酯的表面组成 ,考察了有机硅含量对改性树脂玻璃化温度、熔融黏度、对水的接触角及表面张力的影响。研究发现 ,改性聚酯中的含硅聚酯在表面富集 ,大大降低了聚酯树脂的表面张力 ,提高了其粉末涂料的涂膜耐候性。相对于纯聚酯树脂 ,有机硅质量分数为 1 %可使树脂的表面张力从 49.5降到 2 8.4mN/m ;经 2 1 6h中波紫外线照射后 ,涂膜的光泽保留率从 81 %上升到 91 .3 %。含有机硅质量分数超过 5 %后 ,涂膜的抗冲性能下降。 相似文献