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Microporous membrane, preparing method and use

A technology of microporous membrane and microporous structure, which is applied in the field of microporous membrane materials, can solve the problem that the air permeability, moisture permeability and tensile strength of water pressure resistance of membranes differ greatly, the size of pores in microporous products cannot be accurately controlled, and bacteria , poor virus protection and other problems, to achieve uniform air permeability and moisture permeability, light weight, and the effect of SARS virus protection

Inactive Publication Date: 2004-12-08
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Whether the above-mentioned patents use PTFE or olefin polymers, the biggest defect is that the size of the pores in the obtained microporous product cannot be accurately controlled, and the size distribution of the pores in each part is uneven, which is further manifested in the air permeability of different parts of the same product. The moisture permeability, water pressure resistance and tensile strength are quite different, that is, the inhomogeneity is large
Especially due to the large pore size, the general pore diameter is 1.5 μm. Although this microporous film can be used as general waterproof and breathable clothing, because the pore diameter is larger than the size of 0.3 μm of general bacteria, it is larger than such as "SARS virus (Severe Acute Respiratory Syndrome (severe acute respiratory syndrome coronavirus)" 80-150nm and influenza virus 30nm in size, and the length of its micropores is shorter, which has poor protection against bacteria and viruses

Method used

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  • Microporous membrane, preparing method and use
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Extrusion calendering method: Mix the components listed in Table 1 evenly in a high-speed mixer, then extrude and plasticize them at 180°C in an extruder (domestic, TP-35), and use a calender (three Roller calender) at 70 ° C to form a sheet-like coil with a thickness of 0.12 mm. Then, the film was washed with xylene at 70° C. for 25 minutes, finally dried, and wound up. A microporous membrane with a volume porosity of 55% and an average pore diameter of 30 nm was prepared. Its electron microscope photo is as figure 1 .

[0037] (2) Blow molding method Mix the components listed in the table evenly in a high-speed mixer, then use an extruder (domestic, TP-35) to extrude and plasticize at 200°C, and then use a blow molding machine for blow molding , the thickness is controlled at 0.05mm, then, wash with xylene at 70°C for 8 minutes, and finally dry and roll. A microporous membrane with a volume porosity of 85% and an average pore diameter of 80 nm was prepared. I...

Embodiment 2

[0041] Mix the components listed in the table evenly in a high-speed mixer, then use an extruder (domestic, TP-35) to extrude and plasticize at 180°C, and use a calender (three-roll calender) to compress at 150°C to form Sheet-like coils with a thickness of 0.2 mm. Then, wash with n-hexane at 50° C. for 10 minutes, and finally dry and wind up. A microporous membrane with a volume porosity of 40% and an average pore diameter of 30 nm was prepared. Next, the above-mentioned microporous membrane was biaxially stretched with a stretching machine, and the stretching ratio was 5 times to obtain a microporous membrane with a thickness of 0.07 mm, a volume porosity of 80%, and a pore diameter of 150 nm.

[0042] The above-mentioned microporous membrane has excellent antibacterial properties, the membrane has good flexibility, high elasticity, smooth hand feeling, and the moisture permeability is greater than 5000g / m 2 · d, water pressure resistance 6m water column; observed by elect...

Embodiment 3

[0045] (1) Casting method Mix the components listed in the table evenly in a high-speed mixer, then plasticize at 230°C, cast into a film with a thickness of 0.07mm through a casting machine, wash with toluene at 60°C for 20 minutes, Finally, it is dried and rolled. A microporous membrane with a volume porosity of 80% and an average pore diameter of 60 nm was prepared.

[0046] (2) Casting stretching method Mix the components listed in Table 1 uniformly in a high-speed mixer, then plasticize at 220°C, cast into a film with a thickness of 0.15mm through a casting machine, and wash with toluene at 60°C 20 minutes, finally dry and roll. A microporous membrane with a volume porosity of 50% and an average pore diameter of 50 nm was prepared. Next, the above-mentioned microporous membrane was biaxially stretched with a stretching machine, and the stretching ratio was 7 times to obtain a microporous membrane with a thickness of 0.06 mm, a volume porosity of 80%, and a pore diameter...

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Abstract

A millipore film is prepared from synthetic resin, thermoplastic elastomer, inorganic powder, lubricant and antibacterial agent through proportional mixing, filming and pore forming in solvent. It can be used for virus preventing clothing, diving suit, mountaineering wear, etc. Its advantages are high weight, good heat insulation, high air and moisture permeability, and high tension strength.

Description

technical field [0001] The invention relates to a microporous membrane material, in particular to a protective clothing membrane for isolating viruses and its preparation method and application. Background technique [0002] Waterproof and breathable membranes have a wide range of uses, especially in special protective clothing, such as diving suits, mountaineering suits, sports suits, etc., which are not only light in weight, but also keep warm and breathable; they can be made into diapers, incontinence products, Sanitary products such as bandages are both waterproof and breathable; when the pores of the membrane are smaller than the size of bacteria and viruses, they can block bacteria and viruses and play a protective role. If the membrane contains bactericidal and antivirus substances, the membrane not only blocks bacteria and viruses, And it can sterilize and kill viruses. [0003] At present, some rubber films are mainly used as bacteria and virus protective clothing....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18
Inventor 杨桂生孙学礼
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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