實(shí)驗(yàn)室:Parafilm封口膜,是實(shí)驗(yàn)室工作的理想選擇,它是熱塑性塑料,自動(dòng)密封的,*小化的減少水分的流失,對(duì)于斜置瓶,瓶,培養(yǎng)皿中的樣品起到優(yōu)良的保護(hù)作用。
醫(yī)院:Parafilm封口膜,被當(dāng)作上好的繃帶覆蓋在盒子上,它是*有效的被使用在醫(yī)院的實(shí)驗(yàn)室和**儲(chǔ)存領(lǐng)域,它也可以作為一條障礙和架子,用來防止瓶子、容器、實(shí)驗(yàn)工具的滑移和損壞。
物理性質(zhì):
Parafilm封口膜,是半透明的,有柔性的,熱塑性塑料, 高性能防水材料,本身為無色,無嗅,無味,厚度僅 0.005 ″(0.127mm)。
Parafilm M's 的特性使它適用于許多重要實(shí)驗(yàn)和技術(shù)方面的理想工具,它緊緊而且自動(dòng)密閉的形成在試管,瓶,各種不規(guī)則工具和物體的表面。
它對(duì)于濕氣蒸汽、濕氣損失、濕氣吸收以及滲透氣體具有高度的低靈敏度,這個(gè)特性也是它成為流動(dòng)池中理想的覆蓋工具。
滲透性:
氧氣:
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:滲透比例是在0℃和760mm大氣壓的條件下測定的。
水蒸氣:
扁平:88g/m2/24 hours at 100℉,and 90% R.H. vs. desiccant(干燥劑)
折疊:同上
注意: 由于材料本身對(duì)水蒸氣的低滲透性和低敏感性,所以相對(duì)于氧氣或者二氧化碳的滲透性,這兩者在濕度方面有本質(zhì)的不同。
受普通試劑的影響:
濃鹽酸(12N)稀釋到(5N),在24小時(shí)內(nèi)不會(huì)有明顯影響
濃硫酸(36N)稀釋到(5N),在24小時(shí)內(nèi)不會(huì)有明顯影響
濃硝酸(22%),在24小時(shí)內(nèi)不會(huì)有明顯影響
濃氫氧化鈉(28%),在24小時(shí)內(nèi)不會(huì)有明顯影響
:5%,非長期性,在棕色環(huán)境內(nèi)18個(gè)小時(shí)無明顯影響
1%,效果同上排除在淺色環(huán)境內(nèi)
碘溶液,0.1N:在棕色環(huán)境內(nèi)18個(gè)小時(shí)無明顯影響
氯化鈉20%, 在24小時(shí)內(nèi)不會(huì)有明顯影響
/氯仿/:接觸后開始溶解
乙酸 95%,在24小時(shí)內(nèi)不會(huì)有明顯影響,排除部分變白
異丙醇99%,在24小時(shí)內(nèi)不會(huì)有明顯影響
在超過54度到68度之間封口膜開始變軟和粘稠。
訂貨號(hào)PM996:4″(10.16cm)* 125′(38.1m),適中的尺寸用來覆蓋流動(dòng)池、大口杯保護(hù)樣品
It is a proven fast, economical covering or stopper for test tubes, beakers, vials, petri dishes, flasks and various instruments and objects with irregular surfaces.
In laboratories, Parafilm M® sheet is a thermoplastic, self-sealing film that holds moisture loss to a minimum and offers 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
150 cc/m2 d at 23°C and 50% RH
? Carbon Dioxide (Modulated IR Method):
1200 cc/m2 d at 23°C and 0% RH
? Water Vapor (ASTM F1249-01):
Flat: 1 g/m2 d at 38°C and 90% RH
Creased: same as flat
? Note: Because of low water permeability and the 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 ation in 18 hours
0.1%: same as 5% but slightly less
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 aliphatic and aromatic solvents
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