描述

聚甲基丙烯酸甲酯颗粒/聚甲基丙烯酸甲酯粉末/丙烯酸树脂

PMMA塑料材料

优良的透明度和优异的耐老化性

PMMA具有重量轻、成本低、易于成型的优点

聚甲基丙烯酸甲酯颗粒/聚甲基丙烯酸甲酯粉末/丙烯酸树脂

产品详细信息

聚甲基丙烯酸甲酯颗粒/PMMA粉末/丙烯酸树脂

聚甲基丙烯酸甲酯为无定形聚合物，熔融温度超过160℃，分解温度270℃
1。塑料处理PMMA具有一定的吸水率，其吸水率达到0.3-0.4%，注射温度必须低于0.1%，通常为0.04。水的存在会导致熔体中出现气泡和气泡线，降低透明度等。因此，请将其干燥。干燥80-90℃，时间超过3小时。再生材料在某些情况下可以100%使用，实际重量取决于质量要求，通常超过30%，再生材料应避免污染或影响成品的透明度和性质
2。注塑机选用PMMA注塑机无特殊要求。由于其高熔体粘度，需要深的螺旋槽和大直径的喷嘴孔。如果产品强度高，长径比大的螺杆应在低温下塑化。PMMA还必须使用干料斗储存材料
3。模具和浇口设计模具温度可为60-80℃，主通道的直径应与内锥度相匹配，最佳角度为5到7，对于注塑4毫米或以上，角度应为7、8到10毫米，直径不超过50毫米。壁厚小于4mm的产品浇口总长度，壁厚大于4mm的产品浇口直径为6-8mm，浇口直径为8-12mm，对侧、扇形和垂直浇口深度为0.7-0.9t（t壁厚），针形浇口直径为0.8-2mm；低粘度应选择较小的尺寸。常见的排气孔深度在0.05至0.07 mm之间，脱模斜度在30′-1型腔零件35′-130之间，宽度为6 mm
4。根据供应商提供的信息，熔体温度可通过空气喷射测量：210℃-270℃。5.注射温度可以快速注射，但为了避免高内应力，多阶段注射，慢-快-慢，当厚度较大时，则使用慢速。6.停留时间为260℃，最长10分钟，如果温度为270℃，停留时间不应超过8分钟

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Polymethyl Methacrylate PMMA Granule / PMMA Powder / Acrylic Resin

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PMMA Plastic Material
Excellent transparency and outstanding aging resistance
PMMA has the advantages of light weight, low cost and easy molding.

Polymethyl Methacrylate PMMA Granule / PMMA Powder / Acrylic Resin

Product Details

Polymethyl Methacrylate PMMA Granule / PMMA Powder / Acrylic Resin

The PMMA is amorphous polymer, melting temperature is more than 160℃, decomposition temperature is 270℃.
1. plastic treatment PMMA has certain water absorption, Its water absorption reached 0.3-0.4%, The injection must be below 0.1% temperature, Usually 0.04. The presence of water causes bubbles and gas lines in the melt, Reduced transparency, etc. So dry it. Dry 80-90℃, The time is more than 3 hours. Recycled materials can be used 100% in some cases, The actual weight depends on the quality requirements, Usually over 30%, Recycled materials should avoid pollution or affect transparency and the nature of the finished product.
2. injection molding machine selection PMMA no special requirements for injection molding machine. Because of its high melt viscosity, deep screw grooves and large diameter nozzle holes are needed. If the strength of the product is high, the screw with large aspect ratio should be plasticized at low temperature. Also PMMA must use dry hopper to store material.
3. mold and gate design mold temperature can be 60-80℃, The diameter of the main channel should match the inner taper, The best angle is 5 to 7, For injection molding 4 mm or more, The angle should be 7, 8 to 10 mm, in diameter Do not exceed 50 mm. overall gate length For products with wall thickness less than 4 mm, runner diameter shall be 6-8 mm for products with wall thickness greater than 4 mm, The diameter of the runner shall be 8-12 mm and the depth of the contralateral, sector and vertical sprue shall be 0.7 to 0.9 t (t wall thickness), Diameter of needle gate shall be 0.8 to 2 mm; Low viscosity should be selected smaller size. The common exhaust holes are between 0.05 and 0.07 mm deep and 6 mm wide demoulding slope between 30′-1 cavity part 35′-130.
4. melt temperature can be measured by air injection: from 210℃-270, Depending on the information provided by the supplier. 5. injection temperature can be quickly injected, But to avoid high internal stress, Multistage injection, Slow – fast – slow, When it’s thick, Then use slow speed. 6. detention time is 260℃, For a maximum of 10 minutes, If the temperature is 270℃, The retention time should not exceed 8 minutes.

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