PARAFILM 封口膜 具有柔软性-可塑性-防止水分流失,自动密封性-无味-容易切割,热塑性塑料-半透明-无色。
实验室:PARAFILM 封口膜是实验室工作的理想选择,它是热塑性塑料,自动密封的,Z小化的减少水分的流失,对于斜置瓶,细颈瓶,培养皿中的样品起到的保护作用。
医院:PARAFILM 封口膜 被当作上好的绷带覆盖在盒子上,它是Z有效的被使用在医院的实验室和药物储存领域,它也可以作为一条障碍和架子,用来防止瓶子、容器、实验工具的滑移和损坏。
物理性质:
PARAFILM 封口膜 是半透明的,有柔性的,热塑性塑料, 高性能防水材料,本身为无色,无嗅,无味,厚度仅 0.005 ″(0.127mm)。
Parafilm M''s 的独特特性使它适用于许多重要实验和技术方面的理想工具,它紧紧而且自动密闭的形成在试管,细颈瓶,各种不规则工具和物体的表面。
它对于湿气蒸汽、湿气损失、湿气吸收以及渗透气体具有高度的低灵敏度,这个特性也是它成为流动池中理想的覆盖工具。
渗透性:
氧气:
150cc/m2/24 hours at 73℉,and 50%R.H.
氧化物:
400cc/m2/24 hours at 73℉,and 50%R.H.
注意:渗透比例是在0℃和760mm大气压的条件下测定的。
水蒸气:
扁平:88g/m2/24 hours at 100℉,and 90% R.H. vs. desiccant(干燥剂)
折叠:同上
注意: 由于材料本身对水蒸气的低渗透性和低敏感性,所以相对于氧气或者二氧化碳的渗透性,这两者在湿度方面有本质的不同。
受普通试剂的影响:
浓盐酸(12N)稀释到(5N),在24小时内不会有明显影响
浓硫酸(36N)稀释到(5N),在24小时内不会有明显影响
浓硝酸(22%),在24小时内不会有明显影响
浓氢氧化钠(28%),在24小时内不会有明显影响
高锰酸钾:5%,非长期性,在棕色环境内18个小时无明显影响
1%,效果同上排除在浅色环境内
碘溶液,0.1N:在棕色环境内18个小时无明显影响
氯化钠20%, 在24小时内不会有明显影响
四氯化碳/氯仿/:接触后开始溶解
乙酸 95%,在24小时内不会有明显影响,排除部分变白
異丙醇99%,在24小时内不会有明显影响
在超过54度到68度之间封口膜开始变软和粘稠。
订货号PM996:4″(10.16cm)* 125′(38.1m),适中的尺寸用来覆盖流动池、大口杯保护样品
Parafilm M? all-purpose laboratory film :A versatile, moisture-resistant, thermoplastic flexible plastic for a wide variety of clinicalindustrial applications, Parafilm M? film has been used with confidence for years in scientific researchmedical settings.
It is a proven fast, economical covering or stopper for test tubes, beakers, vials, petri dishes, flasksvarious instrumentsobjects with irregular surfaces.
In hospitals, Parafilm M? sheet makes a superior bandage cover in drainage casesis useful in all stocking areas. It is an ideal shelf or tray liner to prevent slipping of bottles or instruments. It is odorlesssemi-transparent.
In laboratories, Parafilm M? sheet is a thermoplastic, self-sealing film that holds moisture loss to a minimumoffers excellent barrier protection to the contents of tubes, flasks, culture tubes, etc.
Available in four functional roll sizes: 4" x 125''
Parafilm M? FILM Performance Characteristics
Permeability Characteristics:
? Oxygen (ASTM 1927-98):
150 cc/m? d at 23°C50% RH
? Carbon Dioxide (Modulated IR Method):
1200 cc/m? d at 23°C0% RH
? Water Vapor (ASTM F1249-01):
Flat: 1 g/m? d at 38°C90% RH
Creased: same as flat
? Note: Because of low water permeabilitythe insensitivity of this material to moisture vapor, it is unlikely that differences in relative humidity (RH) will make a difference in the oxygen permeability.
Effects of Common Reagents:
? Hydrochloric acid conc. (12N) dil. (5N) - no apparent effect in 24 hours
? Sulphuric acid conc. (36N) dil.(5N) - no apparent effect in 24 hours
? Nitric acid conc. (16N) dil. (5N) - no apparent effect in 24 hours
? Sodium hydroxide conc. (22%) - no apparent effect in 24 hours
? Ammonium hydroxide conc. (28% NH3) - no apparent effect in 24 hours
? Potassium permanganate:
5%: no apparent effect except permanent dark brown coloration in 18 hours
0.1%: same as 5% but slightly less color
Iodine solution 0.1N: no effect except brown staining in 18 hours
? Salt (NACL) solution 20%: no apparent effect in 24 hours
? Ethyl Alcohol 95%: no apparent effect except some face whitening in 24 hours
? Isopropyl alcohol 99%: no apparent effect in 24 hours
? Not recommended for use with chorinated, non-polar aliphaticaromatic solvents
Film becomes softsticky at about 130°F to 150°F (68°C)
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