The polyurethane glue stock used for making draft roll was investigated by using self made chain extender and modifier.

采用自制扩链剂与改性剂，通过对聚合多元醇的品种与分子量的选择，研制出了适合纺织牵伸辊用的聚氨酯胶料。

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The polyurethane glue stock used for making draft roll was investigated by using self made chain extender and modifier. The varieties and molecular weight of polyester polyol were selected.

采用自制扩链剂与改性剂，通过对聚合多元醇的品种与分子量的选择，研制出了适合纺织牵伸辊用的聚氨酯胶料。

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Card stock (white or black is ideal, but any colour is fine), cotton wool, glue, scissors and a pen.

纸板(最好是黑色或者白色的，别的颜色也可以)，棉花，胶水，剪刀和笔。

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Problem is that the gum glue on pill bottle labels tends to melt in the heat and pressure generated by a stock issue laser printer.

FORBES: Toned and ready