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热致变色材料
原理
微胶囊涂有隐形染料,成色剂和温度控制剂。通过选择不同的温度控制因子,可以生产具有不同温度间隔的颜色材料。
2.产品描述
变色原理:低温显色,高温无色
产品范围:-15°C~70°C
基本颜色:每种温度可以提供15种颜色。每种颜色可以相互混合。可以添加其他颜色材料。以下颜色接近PANTONE颜色代码。产品的颜色取决于实际材料。
热变色颜料在塑料制品中的优点:
热致变色颜料适用于注塑和挤出:
其特点是:胶囊壁厚,强度高,耐热性好,均匀分散,脱色时残留颜色少。
适用范围:
该产品可用于透明或半透明塑料的注塑和挤出成型,如聚乙烯(PE),聚丙烯(PP),聚苯乙烯(PS),软聚氯乙烯(S-PVC),AS,ABS和硅胶。。它也可以与不饱和聚酯,环氧树脂,有机玻璃或尼龙单体混合,用于铸造,模塑和固化。
剂量:
当用于注塑,挤出加工或浇铸,模塑和固化时,变色颜料的用量为塑料重量的0.5%-1.0%。变色颜料应与塑料颗粒充分混合(混合时可使用少量白油)。如果普通颜料与变色颜料颜色匹配,则普通颜料(或染料)的用量为变色颜料的约0.5-2.5%。
色母粒:
在大规模生产中,可以将变色颜料添加到聚乙烯蜡或聚苯乙烯蜡中以制备颜料含量为10%的彩色母料,然后与塑料颗粒混合。这使得变色颜料更均匀地分散。
温度:
处理温度应控制在200°C以下,不超过220°C,并尽量缩短材料的加热时间。(高温,长期加热会损害颜料的变色性能)。
注意事项:
注射成型完成后,冷水迅速冷却,产品的色密度更好。(自然冷却,产品散热缓慢会导致产品颜色褪色或变色效果变差)
答:在注塑和挤出中使用变色颜料时,不应在塑料中同时使用其他填料或普通颜料(如二氧化钛,碳酸钙,硫酸钡,炭黑等),否则颜色变化效果将被屏蔽。
B: When using color-changing pigments in casting, molding and solidification, the color-changing pigment should be added to the unsaturated polyester, plexiglass or nylon monomer to stir and disperse uniformly, and then the initiator or curing agent is added to start the polymerization or crosslinking reaction. Since the viscosity of the system rises sharply after the prepolymerization, the addition of the color-changing pigment at this time causes a large amount of pigment particles to be wrapped together and is difficult to disperse uniformly. In addition, the agitation operation at this time also causes a large amount of air bubbles to remain in the system.
C: Careful selection of cross-linking agent or curing agent: During the cross-linking curing process of epoxy resin and unsaturated polyester resin, strong shrinkage stress sometimes occurs inside the epoxy resin and microcapsule shell, and other chemicals enter. The interior of the pigment loses its discoloration properties. This is often the case when the epoxy resin is cured to a thickness greater than 0.2 mm and a polyamine curing agent is used.
D:塑料颗粒和变色颜料的预混合不能使用高剪切设备如混合器,捏合机,高速分散机和双螺杆挤出机进行。这些装置会严重损坏变色颜料表面的保护层,使其失去变色性能。另外,应该防止变色颜料在制备色母料时经历反复挤出造粒操作。
存储方式:
可逆热致变色颜料本身是一种不稳定的体系(当它稳定时很难改变),因此它对光,热和老化的耐受性远低于普通颜料,应在使用中注意。

| Registration Date | 2019/07/31(Year/Month/Date) |
|---|---|
| Buyer / Seller in EC21 | Seller |
| Business Type | Manufacturer |
| Year established | 2016 |
| Employees total | 51 - 100 |
| Annual revenue | USD 100,000 - 500,000 |
| Company | Shenzhen Liying Plastic Chemical Co., Ltd. |
|---|---|
| Address | Room 915, Xin Yongsheng Building, 72 Songgang Avenue, Songgang Street, Bao'an DistrictShenzhen粤518103China |
| Phone | 86 - 0755 - 33515978 |
| Fax | 86 - 0755 - 33515979 |
| Homepage | http://www.liyingsuhua.com |
| Contact | Aileen Lee |