3M中空玻璃微球綜述

一． 3M中空玻璃微球的物性

* 形狀                壁薄的單個空心球體                                 降低密度，減輕重量

* 成分                堿石灰硼硅酸鹽玻璃                                 粘度低、提高流動性

* 水溶性            不溶于水                                                     成本經(jīng)濟，部分取代樹脂

* 顏色                純白色                                                        不吸收樹脂、高填充率

* 密度                0.125-0.60g/cc                                         優(yōu)秀的隔音性能

* Ph值               堿性—9.5                                                  低熱傳導(dǎo)系數(shù)（0.003-0.01BTU/in.hr. ℉），隔熱作用

* 抗壓強度       1.72MPa – 124.02 MPa                         低介電常數(shù)(1.2-2.0)

* 軟化溫度        600 ℃                                                        減少收縮降低翹曲，增加產(chǎn)品尺寸穩(wěn)定性

                                                                                              防止開裂

                                                                                              防止玻纖外露

3M 玻璃微球普通系列（堿石灰硼硅酸鹽玻璃）

 等級     抗壓強度（MPa）      抗壓強度（psi）     真實密度                          粒徑（um）                                  顏色

                90% 存留                     90%存留                  (g/cc)         10% 以內(nèi)    50%以內(nèi)   90%以內(nèi)    

K1              1.72                               250                      0.125             30                   65             110           120         純白

K15            2.07                               300                      0.15               30                   60              105          115         純白

S15            2.07                               300                      0.15               25                   55               90            95           純白

K20            3.45                               500                      0.2                 30                   65             110            120         純白

S22            2.76                               400                      0.22               20                   35               60             75          純白

K25            5.17                               750                      0.25               25                   55               95           105          純白

S32          13.78                            2000                      0.32               20                   40                75            80          純白

K37          20.67                            3000                      0.37               20                   40                80            85          純白

S38          27.56                            4000                      0.38               15                   40                75            85          純白

S38HS    37.9                               5500                      0.38               15                   40                75            85          純白

K46         41.34                             6000                      0.46               15                   40                75            80          純白

S60          68.9                             10000                     0.6                 15                   30                55            65          純白

S60HS    124.02                         18000                     0.6                 11                   30                50            60          純白