申请人:TOYO SEIKAN KAISHA LIMITED
公开号:EP0076634A1
公开(公告)日:1983-04-13
Disclosed is a process for the preparation of metallic bottles which comprises lap-bonding circumferential open end portions of upper and lower members, each consisting of a formed cup of a metal, said process being characterized by using at least one thermoplastic resin adhesive having a water absorption of less than 2%, as measured at a temperature of 23°C and a relative humidity of 80%, and an elasticity contribution ratio [R(t)t=1] of from 1 x 10-4 to 5 x 10-1, defined by the following formula:
wherein J(t)t=1 represents a creep compliance at a time constant of 1 second when the adhesive is caused to creep at a temperature higher by 30°C than the melting point of the adhesive under a shear stress of 50 to 5,000 dyne/cm2, and J(t)rec,t=1 represents an equilibrium recovery creep compliance when the adhesive is caused to creep under the same conditions as described above and the adhesive is then let to recover, and containing in the main or side chain groups
at a concentration of 10 to 1400 milliequivalents per 100 g of the adhesive.
本发明公开了一种制备金属瓶的工艺,该工艺包括搭接粘接上下构件的圆周开口端部,每个构件都由一个成形的金属杯组成,所述工艺的特点是使用至少一种热塑性树脂粘合剂,该粘合剂在温度为23℃和相对湿度为80%的条件下测量,吸水率小于2%,弹性贡献率[R(t)t=1]为1×10-4至5×10-1,由下式定义:
其中,J(t)t=1 代表时间常数为 1 秒时的蠕变顺应性,即在剪切应力为 50 至 5000 达因/厘米2 的条件下,在比粘合剂熔点高 30℃的温度下使粘合剂发生蠕变;J(t)rec,t=1 代表平衡恢复蠕变顺应性,即在与上述相同的条件下使粘合剂发生蠕变,然后让粘合剂恢复,并且在主链或侧链基团中含有
浓度为每 100 克粘合剂 10 至 1400 毫当量。