摘要
在石头纸粒料中分别加入质量分数为0.1%,0.4%和0.7%的AC发泡剂,经过高速冷混、熔融混合后,从挤出机挤出预发泡纸膜,再经过热压使纸膜发泡,冷切后分别制得了厚度增加倍率为0.4,0.2和0.8的发泡石头纸。通过扫描电镜对发泡石头纸表面结构和横截面结构进行了观察,发现石头纸表面有微孔结构,石头纸内部的微孔结构规整,其孔壁在发泡产生的气体压力下被拉伸,随着发泡剂量的增加这种拉伸现象越明显。研究表明:发泡石头纸的密度比普通未发泡石头纸减小了16%～30%;石头纸中AC发泡剂质量分数为0.1%时,发泡石头纸的物理性能增强,质量分数为0.4%和0.7%时,其物理性能有所下降。
AC blowing agent of 0.1%,0.4% and 0.7% mass fraction was added to pellets of rich mineral paper.Foam rich mineral paper with 0.4,0.2 and 0.8 thickness increasing rate was prepared through high speed cooling mixing,melting and mixture,pre-foaming extruding,hot press foaming,cooling,and cutting.The surface and cross section structure of the foaming rich mineral paper was observed with SEM.Micro-porous structures was founded on the surface;porous structures within the foam rich mineral paper was regular arranged;pore walls of which is stretched under the pressure generated by foaming.The results showed that the density of foam rich mineral paper is 16% to 30% lighter than rich mineral paper;when the AC blowing agent addition is 0.1%,the physical performance of foaming rich mineral paper is enhanced;when the additions of the AC blowing agent are 0.4% and 0.7%,its physical properties decline a certain degree.
出处
《包装工程》
CAS
CSCD
北大核心
2011年第11期21-25,共5页
Packaging Engineering
关键词
发泡
石头纸
微孔结构
包装材料
rich mineral paper
foam
porous structure
packaging materials
