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1.发明授权Thermoplastic binders for continuously produced leads for pencils,copying pencils and coloured pencils 失效用于连续生产铅笔，复印纸和彩色笔杆的热塑性粘合剂
公开(公告)号：US3821157A
公开(公告)日：1974-06-28
申请号：US36118673
申请日：1973-05-17
Applicant: BAYER AG
CPC classification number: C09D13/00
Abstract: Leads for writing purposes comprising a graft polymer of an ethylene/vinyl acetate copolymer, a vinyl chloride and a graft copolymer of a styrene and an acrylonitrile type monomer onto a butadiene polymer and graphite or a scouring agent.
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2.发明授权Process and apparatus for the continuous production and/or covering of extruded sections 失效连续生产和/或覆盖挤压部分的过程和装置
公开(公告)号：US3780154A
公开(公告)日：1973-12-18
申请号：US3780154D
申请日：1971-06-15
Applicant: BAYER AG
CPC classification number: B29C47/128 , B29C47/0014 , B29C47/0016 , B29C47/0021 , B29C47/0023 , B29C47/0026 , B29C47/003 , B29C47/025 , B29C47/20 , B29C47/28
Abstract: Extruded sections are covered with plasticised synthetic plastics material in an extruder nozzle, by having the plastic synthetic plastics material first of all flowing from outside around the extruder nozzle, then guided opposite to the ejection direction, and then deflected into the duct of the extruder nozzle.
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