1.注塑過程中使用更多純樹脂
1. Use more pure resin during injection molding
在許多塑料的注塑加工中，尤其是在諸如聚氯乙烯，苯乙烯，聚乙酸乙酯和丙烯酸酯之類的塑料中，痕量的殘留單體會(huì)產(chǎn)生難聞的氣味。使用單體殘留非常困難的樹脂就足夠了,這些氣味。如果使用本來就無味的樹脂，則效果會(huì)很差。
In the injection molding of many plastics, especially in plastics such as polyvinyl chloride, styrene, polyvinyl acetate and acrylate, trace residual monomers will produce unpleasant smell. It is sufficient to use a resin with very difficult monomer residue to eliminate these odors. If you use an already tasteless resin, the effect will be very poor.
2.注塑加工改變添加劑
2. Change additives in injection molding
用于生產(chǎn)聚氨酯泡沫的叔胺催化劑通常會(huì)產(chǎn)生非常微弱的氣味，此外，它還會(huì)在汽車的內(nèi)窗玻璃上形成霧氣。該問題的方法是找到這些胺的替代物，其中一種措施是使用多羥基化合物，剩余的羥基化合物不僅是聚氨酯分子鏈的組成部分，因此它們還具有催化活性。一些多羥基化合物也可以代替叔胺催化劑的一半，因此生成的產(chǎn)品散發(fā)出的臭味比那還少。
The tertiary amine catalyst used to produce polyurethane foam usually produces very faint odors. In addition, it also forms fog on the inner windows of cars. The way to solve this problem is to find substitutes for these amines. One measure is to use polyhydroxy compounds. The remaining hydroxyl compounds are not only components of polyurethane molecular chain, so they also have catalytic activity. Some polyhydroxy compounds can also replace half of the tertiary amine catalyst, so the resulting products emit less odor than that.
PVC擠出或壓延中使用的苯酚穩(wěn)定劑通常被高氣味的鋅穩(wěn)定劑代替。由于其高氣味和低霧化特性，熱穩(wěn)定劑辛酸錫在汽車PVC中也很常見。在產(chǎn)品中，植物提取油（如芥酸和油酸）比胺潤(rùn)滑劑（用于聚烯烴和苯乙烯食品包裝中）的氣味要高得多材料）由動(dòng)物提取油制成。
Phenol stabilizer used in PVC extrusion or calendering is usually replaced by high odor zinc stabilizer. Due to its high odor and low atomization characteristics, heat stabilizer tin octanoate is also very common in automotive PVC. In products, vegetable extracted oils (such as erucic acid and oleic acid) have a much higher odor than amine lubricants (used in polyolefin and styrene food packaging). Materials) are made of animal extracted oils.
3.注塑加工吸附劑
3. Injection molding adsorbent
如果聚合物中填充有少量沸石（一種鋁硅酸鹽吸附劑），它將起到材料異味的作用,沸石具有大量的圓盤，可以捕獲帶有氣味的小氣體分子。該分子吸附劑已成功應(yīng)用于聚烯烴擠出管，注塑加工和擠出吹塑容器，隔離包裝材料，擠出包裝材料和密封件。分子吸附粉末也可以作為吸濕劑添加到塑料中,除去除水蒸氣外，該水蒸氣還將有助于塑料制品的氣味。
If the polymer is filled with a small amount of zeolite (an aluminosilicate adsorbent), it will eliminate the peculiar smell of the material. Zeolite has a large number of discs, which can capture small gas molecules with odor. The molecular adsorbent has been successfully applied to polyolefin extrusion tubes, injection molding and extrusion blow molding containers, isolation packaging materials, extrusion packaging materials and seals. Molecular adsorption powder can also be added to plastics as a hygroscopic agent. In addition to water vapor, the water vapor will also contribute to the odor of plastic products.
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