| 脱模剂使用注意 |
| 添加时间：2018/5/10 16:34:23 浏览次数： |
| 脱模剂使用注意 Attention to the use of demoulding agents 由于大多数液体状内脱模剂都是酸性的，所以在使用中要注意以下问题： Since most of the liquid release agents are acidic, attention should be paid to the following problems in use. 1、在使用对酸敏感的颜料时会导致颜色变化； 1, when using acid sensitive pigments, it will lead to color changes. 2、在使用碱性填料时，如碳酸钙，酸性脱模剂会与之起反应，引起混合料的粘度增加，但不会影响脱模效果； 2, in the use of alkaline fillers, such as calcium carbonate, acid release agent will react with it, resulting in increased viscosity of the mixture, but will not affect the mold release effect; 3、如果填料为氢氧化铝，酸性脱模剂除了会使混合料的粘度增加外，还会在混合料固化过程中放出水份，导致气泡、裂纹等问题。 3, if the filler is aluminum hydroxide, the acid demoulding agent will increase the viscosity of the mixture in addition to the increase of the viscosity of the mixture, but it will release water in the curing process of the mixture, which leads to the problems of bubbles and cracks. 通常，内脱模剂的起始用量为树脂量的1%，有效添加范围是基于树脂重量的0.75-2%。应根据实际情况适当调整。 In general, the initial dosage of the internal release agent is 1% of the resin content, and the effective addition range is 0.75-2% based on the resin weight. It should be properly adjusted according to the actual situation. 1、薄壁的简单型材，用量可以适当少些，比如0.8%或更少； 1, thin walled simple profiles, the amount can be less appropriate, such as 0.8% or less; 2、厚壁或形状复杂的型材需要多加一些。 2, thicker or more complex profiles need to be added. 3、在高填料体系内，应提高内脱模剂的添加量，但内脱模剂添加量过多，会延迟固化。 3. In high filler system, the amount of internal mold release agent should be increased, but the excessive amount of internal mold release agent will delay the curing. 4、在拉挤生产中，如果阻力过大又找不到原因时，就需要适当增加脱模剂用量。在使用时应注意加料顺序，在混合时应在加入固化剂、填料和其它树脂添加剂之前，将内脱模剂加树脂体系中并混合均匀。这样可以达到最佳的脱模效果。 4, in pultrusion production, if the resistance is too large and the cause can not be found, it is necessary to increase the dosage of the release agent appropriately. The order of feeding should be paid attention to in use, and the internal demoulding agent should be added to the resin system and mixed evenly before adding the curing agent, packing and other resin additives. This can achieve the best demoulding effect. |
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