挤塑板在加工过程中其中之一是由聚苯乙烯树脂辅以聚合物加催化剂制成，不具备良好的阻燃功能。后续生产中会添加一定量的阻燃剂，有助于提高其阻燃性。那么，影响挤塑板阻燃性的因素有哪些呢？介绍如下。

One of the extruded boards in the processing process is made of polystyrene resin, polymer and catalyst, which does not have good flame retardant function. A certain amount of flame retardant will be added in subsequent production, which will help to improve its flame retardancy. So, what are the factors that affect the flame retardancy of extruded boards? The introduction is as follows.

人为因素

human factor

挤塑板中阻燃剂的添加量很少，一般在10%以下。要使阻燃剂均匀地分布在材料中，搅拌是关键部分。5克左右的阻燃剂，可想而知需要大量的人工搅拌或专用搅拌机进行搅拌。大部分厂家会直接洒在物料表面，送入加料机，虽然加料机自带搅拌，短时间只能形成小面积分散，难以混合均匀，导致区域性阻燃。不合格项目主要体现在GB8624要求的氧指数测试。

The addition amount of flame retardant in extruded board is very small, generally less than 10%. Stirring is the key to make the flame retardant evenly distributed in the material. It is conceivable that about 5g of flame retardant requires a large number of manual mixing or special mixer for mixing. Most manufacturers will directly sprinkle it on the material surface and send it to the feeder. Although the feeder has its own mixing, it can only form a small area of dispersion in a short time, which is difficult to mix evenly, resulting in regional flame retardance. The unqualified items are mainly reflected in the oxygen index test required by GB8624.

生产工艺因素

Production process factors

不同的设备制造商对设备内部结构的设计不同，导致物料在设备内部的塑化、分散和停留时间不同。常规阻燃剂主要为六溴环十二烷，其分解温度较低，与普通挤塑板的加工温度不一致。普通的热温度足以分解大部分阻燃剂。因此，我们通常以熔融温度作为阻燃板的标准，而不是加热温度。

Different equipment manufacturers have different designs for the internal structure of the equipment, resulting in different plasticization, dispersion and residence time of materials in the equipment. The conventional flame retardant is mainly hexabromocyclododecane, and its decomposition temperature is low, which is inconsistent with the processing temperature of ordinary extruded boards. Ordinary thermal temperatures are sufficient to decompose most flame retardants. Therefore, we usually take the melting temperature as the standard of the flame retardant board, rather than the heating temperature.

实际生产证明，厂家根据设备的不同，将较高的熔体温度调节在175-190摄氏度之间，可以更好的生产出质量更好、阻燃效果更好的板材。工艺温度相反，主要是因为设备的生产工艺是以新型聚苯乙烯颗粒的熔融温度为基准的。

The actual production has proved that the manufacturer can better produce plates with better quality and better flame retardant effect by adjusting the higher melt temperature between 175-190 ℃ according to different equipment. The process temperature is opposite, mainly because the production process of the equipment is based on the melting temperature of the new polystyrene particles.

在实际生产中，大部分板材都是用回收的PS颗粒生产的，回收的PS颗粒与新材料的熔化温度相差20-30摄氏度。因此，设备对物料的剪切热会越来越高。如果长期生产过程中的加热温度和冷却水不调整，阻燃成分就会分解失效。不合格项目主要体现在单体测试参数上。.

In actual production, most plates are produced with recycled PS particles, and the melting temperature of recycled PS particles is 20-30 ℃ different from that of new materials. Therefore, the shear heat of equipment to materials will be higher and higher. If the heating temperature and cooling water are not adjusted in the long-term production process, the flame retardant components will decompose and fail. The unqualified items are mainly reflected in the individual test parameters

华美橡塑保温山东总代理人员提醒您，阻燃剂按外观分为粉状、颗粒状和色母粒三种。母粒由阻燃剂加塑料载体和分散剂经挤出机加热造粒而成。阻燃成分将占40%-50%。母粒分散性好，使用卫生无粉尘，阻燃。一次处理后，难免会有一点损失。粉状阻燃剂使用较早，应用广泛，经济性好，阻燃效果好，但易脱层。

Huamei rubber and plastic insulation Shandong general agent reminds you that flame retardants are divided into powder, granular and color masterbatch according to their appearance. Master batch is made of flame retardant, plastic carrier and dispersant by heating and granulating in extruder. Flame retardant components will account for 40%-50%. Masterbatch has good dispersibility, no dust and flame retardant. After one treatment, it is inevitable that there will be some losses. Powdered flame retardant is used earlier and widely, with good economy and flame retardant effect, but it is easy to delaminate.

粒状阻燃剂是通过干法挤出制成颗粒状的粉末阻燃剂，不添加任何杂质，不经热处理，无材料分解损失，其成分与粉剂相同，用量相同，比重颗粒与PS相同。颗粒相互接近，解决了粉状产品分散不均匀的问题，现已被广泛使用。

Granular flame retardant is a granular powder flame retardant made by dry extrusion. It does not add any impurities, does not undergo heat treatment, and has no material decomposition loss. Its composition is the same as that of powder, its dosage is the same, and its specific gravity particles are the same as that of PS. The particles are close to each other, which solves the problem of uneven dispersion of powder products, and has been widely used.

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