And Tian is a hydrous calcium magnesium silicate having a chain structure. It is a collection of microfibrous or dense massive minerals mainly composed of tremolite and actinolite , and containing other trace minerals. The chemical composition is Ca 2 (Mg, Fe 2+ ) 5 (Si 4 O 11 ) 2 (OH) 2 . Is a monoclinic system. The crystal is fibrous or needle-shaped. The colors are various, and are white, cyan, yellow, green, black, red, and the like. It is generally lustrous and sometimes waxy. Translucent to opaque. The refractive index is 1.606-1.632, and the birefringence is 0.021-0.023. No fluorescence or phosphorescence. Hardness 6-6.5, density 2.9-3.1g/cm3. The fracture is jagged. Extremely tough, fine texture, tough, polished surface is very bright. Nephrite is mainly produced in the green schist facies which are in contact with metamorphic metamorphic belts and shallow metamorphic belts, and sometimes may be altered or metamorphosed by basic magmatic rocks. China is the oldest and most famous country in the world for the production of jade . The main producing areas are the Hetian Yulong Kashi River in the south of Xinjiang, the Karakash River and the Kunlun Mountains in the upper reaches of the Yarkant River. Other countries producing nephrite include Australia, Canada, the United States, Russia, New Zealand, and Brazil.
In the silicone industry, to meet the user experience of the majority of consumers, multi-color products have always been the best-selling products, the process is used in silicon materials bonding and plastic bonding.
1. Soft and hard plastic two-color design
In the silicon bonding area, several silicon materials will be used to achieve different color silicon, different rubber components, so the multi_k color process is commonly used and is quite popular.
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The two materials must have a certain temperature difference in the melting point. Generally, it is recommended to reach 60°. It is recommended to be at least 30°. The melting temperature of the first shot material is high. Generally, the first shot is PC or PC/ABS, and the second shot is TPU or TPE, PC thickness is 0.6-0.7mm, soft rubber part thickness is required to be 0.4mm or more.
Try to widen the contact area, make grooves to increase the adhesion, or use the core for the first shot, and the second part of the material is injected into the first shot. The surface of the first shot is as rough as possible.
2. Material compatibility
Multi-color injection molded mating materials must meet two basic compatibility conditions. They are compatible with the adhesive compatibility and processing.
3. Transparent and non-transparent two-shot design
(1) Double shot design of small lenses
The first shot is non-transparent, and the second shot is made of a lens. The first shot uses a PC with a high melting point and the second shot uses a PMMA.
(2) Transparent and non-transparent bijective design for decoration
The first shot is a non-transparent material, the second shot is a transparent material, and the non-transparent material is generally a high temperature of the PC material of SABIC, and the second shot transparent material is PMMA or PC. The PC needs to be sprayed with UV to protect it. PMMA can choose uv or fortification. If there are characters on the surface, you must choose UV
Hetian jade has at least 7,000 years of history in China, also known as nephrite, which is the main body of Chinese jade culture. Because of its delicate texture, Hetian jade has a beautiful and moisturizing effect, uniform color, soft and fat, and it has a special fineness, so its beauty is smooth and moist, the color is uniform, soft and fat, it has a a special kind of gloss, gloss between glass, oil sheen, between waxy luster, luster can be called jade, this beauty is very elegant; but also very tough and Tian, under pressure can be more than steel. If you add delicate carvings, you can really cultivate people's temperament and character.