会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 7. 发明专利
    • HEAT-SHRINKABLE MULTILAYER FILM
    • JPH01225550A
    • 1989-09-08
    • JP5118788
    • 1988-03-04
    • KUREHA CHEMICAL IND CO LTD
    • NISHIMOTO YOSHIHARUYAMAZAKI KENGO
    • B32B7/02B32B27/08B32B27/28B32B27/34
    • PURPOSE:To enhance stretchability, heat-shrinkability and dimensional stability, by forming a film from two layers of a polyamide resin blend layer containing two kinds of polyamides having specific crystal melting points, and a resin blend layer based on a saponified ethylene/vinyl acetate copolymer. CONSTITUTION:This multilayer film consists of a resin blend layer, which consists of 55-90wt.% of a polyamide resin (PA resin) having a crystal melting point of 175-240 deg.C such as nylon 6 or nylon 9 and 45-10wt.% of a polyamide resin having a crystal melting point of 120-below 175 deg.C such as nylon 6-69 or nylon 6-12, and a resin blend layer based on a saponified ethylene/vinyl acetate copolymer (EVOH resin). When the crystal melting point of the PA resin exceeds 240 deg.C, the crystallinity thereof becomes high and stretchability thereof easily becomes inferior and, when the crystal melting point is below 120 deg.C, stretchability and heat resistance become inferior. The ethylene content of the EVOH resin is 25-49mol% and the saponification degree thereof is 95% or more and, when the ethylene content exceeds 49mol%, a gas barrier property becomes inferior and, when the ethylene content is below 25mol%, stretchability is inferior.