发明名称 |
Plastics foil for the manufacture of audio-visual information carriers |
摘要 |
A rigid polyvinyl chloride foil with modified impact resistance and free from plasticizer especially suitable for the manufacture of audio-visual information carriers with stamped spiral grooves from which the information is played back by pressure scanning. The foil is characterized by a special combination of properties such as flow, reduction in length, toughness, surface resistance, elasticity, peak-to-valley height and surface deposit.
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申请公布号 |
US4071490(A) |
申请公布日期 |
1978.01.31 |
申请号 |
US19760721308 |
申请日期 |
1976.09.08 |
申请人 |
HOECHST AKTIENGESELLSCHAFT |
发明人 |
ANDRASCHECK, HANS-JOACHIM;MUCKE, RAINER;LORZ, WERNER;BORCHARD, HEINZ;BUCK, JURGEN;KNOTHE, HERBERT;RYBKA, BRUNO |
分类号 |
G11B7/24;G11B3/70;G11B7/253;(IPC1-7):C08L91/00 |
主分类号 |
G11B7/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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