CN103211545B - A kind of wet tissue for escaping during fire and preparation method thereof - Google Patents

Abstract

The present invention relates to a wet tissue used for escaping in case of fire and a preparation method thereof, characterized in that the wet tissue includes a non-woven fabric carrier impregnated with a refreshing Chinese herbal medicine solution, and at least one side is covered with a layer with a thickness of 0.1 um-1mm polymer film containing hydrophilic functional groups, the Chinese herbal medicine solution is made by mixing mint, cloves and water, the weight ratio of various components is: mint 0.1-5wt%, cloves 0.1-5wt%, water is margin. Among them, the polymer film layer can filter harmful smoke and dust, and activated carbon or titanium dioxide that can adsorb harmful gases can be placed in the non-woven fabric layer, which can further absorb harmful gases and reduce the harm of harmful smoke to the human body. The present invention has the characteristics of simple structure, small size, convenient use, simple preparation process and low cost. It can effectively wake up the brain and prevent smoke when escaping from a fire. Early or late people's escape safety.

Description

A kind of wet tissue used for escaping in case of fire and its preparation method

technical field

The invention relates to a self-rescue article used for escaping from a fire, in particular to a wet tissue used for self-rescue and mutual rescue in the early or late stage of a fire and a preparation method thereof.

Background technique

In recent years, with the rapid development of urban buildings, large fires and extraordinarily large fires are more likely to increase, seriously threatening the safety of people's lives and properties. Smoke is an inevitable product of fire. When a fire breaks out in a building, the toxic smoke produced by building materials paralyzes the central nervous system, causing people to lose their ability to escape. It is the main factor that causes people to be injured or killed.

Most of the anti-smoke devices used for self-rescue when an existing fire broke out are face shields. Patent CN2360110Y discloses a support mask for fire escape, which is composed of a breathing mask, an automatic oxygen supplier and a see-through window, which can effectively prevent oxygen from escaping outwards and ensure the safety of users; patent CN1403175A discloses an emergency smoke mask , the mask completely covers the user's mouth and nose, has a large protective area, and has an obvious blocking effect on smoke. However, it is not difficult to find that the existing emergency smoke-proof products have the disadvantages of complex structure, cumbersome wearing, large volume, and high cost, making it impossible to configure sufficient protective articles in the fire exits of the building. It is easy to panic and cannot wear the product as required, which also limits the protection of such products to personnel.

Contents of the invention

The first technical problem to be solved by the present invention is to provide a wet tissue used for escape in case of fire, which has the characteristics of small size, light weight, clear mind, anti-smoke and low cost.

The second technical problem to be solved by the present invention is to provide a method for preparing wet wipes used for escaping in case of fire. Features.

The technical scheme adopted by the present invention to solve the first above-mentioned technical problem is: a kind of wet tissue used for escape in case of fire, which is characterized in that it is a non-woven fabric carrier impregnated with a refreshing Chinese herbal medicine solution. At least one side of the woven fabric carrier is covered with a polymer film containing a hydrophilic functional group with a thickness of 0.1um-1mm. The Chinese herbal medicine solution is made by mixing mint, clove and water, and the weight ratio of various components is: mint 0.1-5wt%, clove 0.1-5wt%, water as the balance.

As an improvement, activated carbon or particles for adsorption of titanium dioxide having the function of absorbing toxic gases are added to the non-woven fabric carrier.

Preferably, the polymer film is a polyvinyl alcohol film, the degree of hydrolysis of the polyvinyl alcohol used is above 80%, and the thickness of the polyvinyl alcohol film is 1um-100um.

Finally, the mass percentage of peppermint and clove in the Chinese herbal medicine solution is 1 wt%.

The technical solution adopted by the present invention to solve the second above-mentioned technical problem is: a preparation method of a wet wipe used for escaping in a fire, characterized in that the steps are:

1) Using non-woven fabric as the base material of the carrier, the polymer film containing hydrophilic functional groups is coated on the surface of the non-woven fabric by phase inversion film formation, spin coating or direct film method, so that the thickness of polyvinyl alcohol is between Between 0.1um-1mm;

2) Preparation of Chinese herbal medicine solution: at 0-50°C, prepare according to the mass percentage of mint 0.1-5wt%, clove 0.1-5wt%, and water as the balance;

3) Soak the non-woven fabric coated with the polymer film in the Chinese herbal medicine solution for 1 min-2 h to obtain the final product.

As an improvement, the process of forming a film by the phase inversion method in the step 1) is: adding a certain amount of polyvinyl alcohol into hot water at a temperature of 90°C-100°C, and configuring a polyethyl alcohol with a concentration of 5%-80wt% Aqueous solution, immerse the non-woven fabric in the polyvinyl alcohol solution, the immersion time is 10 seconds-4h, preferably 1min-2h, more preferably 5min-40min, and then blow it to dry with air at room temperature, so that the polyvinyl alcohol is deposited on the non-woven fabric textile surface;

The technological process of the spin-coating film is as follows: a certain amount of polyvinyl alcohol is added into hot water at a temperature of 90°C-100°C, and an aqueous solution of polyethanol with a concentration of 5%-80wt% is prepared. Using a spin coating machine to evenly deposit polyvinyl alcohol on the surface of the non-woven fabric, followed by air drying, so that the polyvinyl alcohol is deposited on the surface of the non-woven fabric;

The preparation process of direct film sticking is as follows: buy a polyvinyl alcohol film with a thickness of 0.1um-1mm in the market, and bond the film to one or both sides of the non-woven fabric to obtain a non-woven fabric covered with a polyvinyl alcohol film. .

Further improvement, the non-woven fabric in the step 1) is added with activated carbon or titanium dioxide adsorption particles with the function of absorbing toxic gases, and the thickness of polyvinyl alcohol is between 1um-100um.

Preferably, the temperature for preparing the Chinese herbal medicine solution in step 2) is 5-25°C, more preferably 10-20°C, and the mass percentage of mint and clove in the Chinese herbal medicine solution is 1wt%.

Finally, the time for soaking the non-woven fabric in the step 3) in the Chinese herbal medicine solution is preferably 10 min-1 h.

Compared with the prior art, the present invention has the advantages that: the non-woven fabric is used as the carrier base material, mainly to ensure that the product has a certain strength and toughness; a layer of polyvinyl alcohol film is coated on the non-woven fabric, By adjusting the thickness and pore characteristics of the polyvinyl alcohol film, the non-woven fabric covered with the polyvinyl alcohol film has the function of filtering and blocking harmful smoke and dust while ensuring a good air permeability; the non-woven fabric The activated carbon or titanium dioxide placed in the layer can further absorb harmful gases and reduce the harm of harmful smoke to the human body; the prepared Chinese herbal medicine solution can refresh the mind during the escape process. The present invention has the characteristics of simple structure, small size, convenient use, simple preparation process and low cost. It can effectively wake up the brain and prevent smoke when escaping from a fire. Escape safety for early or late people

detailed description

Below in conjunction with embodiment the present invention is described in further detail.

Example 1

After the non-woven fabric is sliced, at 95°C, as for the polyvinyl alcohol aqueous solution with a concentration of 30wt%, the weight average molecular weight of the polyvinyl alcohol used is 15000, and the degree of hydrolysis is 95%. After immersing for 1 hour, it is fully dried with air to form a coated Polyvinyl alcohol non-woven fabric with a thickness of 12.5um. At 20°C, put the non-woven fabric in an aqueous solution composed of 1 wt% mint and clove for 5 minutes, take it out and dry it until there is no water drop, and set it aside.

Example 2

Pre-configure a polyvinyl alcohol aqueous solution with a concentration of 50%, use a spin coating machine to coat the non-woven fabric, and obtain a non-woven fabric coated with polyvinyl alcohol with a thickness of 10.3um after drying at 20°C. After the non-woven fabric is placed in an aqueous solution composed of 1 wt% mint and clove for 5 minutes, it is taken out and dried until there is no water drop, and is set aside.

Example 3

Paste a polyvinyl alcohol film with a thickness of 10.0um on both sides of the non-woven fabric, place the non-woven fabric in an aqueous solution of 1 wt% mint and clove for 5 minutes, take it out and dry it until there is no water drop, and set it aside.

Example 4

Paste a polyvinyl alcohol film with a thickness of 10.0um on one side of the non-woven fabric, place the non-woven fabric in an aqueous solution composed of 1 wt% mint and clove for 5 minutes, take it out and dry it until there is no water drop, and set it aside.

Example 5

Add 1.0g activated carbon to the non-woven fabric, then stick a polyvinyl alcohol film with a thickness of 10.0um on both sides of the non-woven fabric surface, and place the non-woven fabric in an aqueous solution of 1 wt% mint and clove for 5 minutes, Take out and dry until there are no water droplets, set aside.

Example 6

Add 1.0g of titanium dioxide to the non-woven fabric, then stick a polyvinyl alcohol film with a thickness of 10.0um on both sides of the surface of the non-woven fabric, place the non-woven fabric in an aqueous solution of 1 wt% mint and clove for 5 minutes, and then take it out Dry until there is no water drop, set aside.

comparative example

After placing the non-woven fabric in an aqueous solution composed of 1 wt% mint and clove for 5 minutes, take it out and dry it until there is no water drop, and set it aside.

Air permeability test for products

Air permeability testing is used to evaluate a material's ability to exchange air.

Fundamentals of the Experimental Method

The principle of the test is to evaluate the resistance of the product to the passage of air. Measure the volume of air flowing through a sample of a given size under standard conditions, (23°C/50% relative humidity) and a given pressure difference. The instrument used in the experiment is: Air Permeabilimeter FX3300 manufactured by TexTestAG Switzerland. Prepare a sample with an area of 100 square millimeters, place the sample on the device, use a suction pump to generate a low pressure of 1210 Pa, and suck air through the sample layer. The device measures the volume of a gas flow at a constant pressure drop across a small orifice containing the sample and measuring head. Finally, the device produces an air permeability value in "1/m ² s". For each sample, 6 measurements are required to obtain the average value.

Smoke and dust transmission rate test for products

The smoke transmission rate test is used to evaluate the barrier ability of materials to smoke.

experimental method

Mix 10wt% carbon black particles with a size of 100um in the air, make the air flow under a given pressure, and measure the passing rate of the carbon black at a given sample size. Prepare a sample with an area of 100 square millimeters, clamp it in the middle of the pipe, pass air containing carbon black particles with a concentration of 10wt% and a size of 100um in the pipe, and the flow rate is 5ml/min. After 2min, measure the back of the sample For the black area on the air side, its transmittance is measured by "%".

The experimental results are shown in Table 1, which shows that the non-woven fabric covered with polyvinyl alcohol film can effectively prevent the penetration of smoke and dust while ensuring good air permeability. In addition, the sample contains sobering Chinese herbal ingredients. It is believed that this product will effectively protect the safety of personnel and keep them awake during escape.

Table 1 Test results of sample air and smoke transmission rate

Claims (6)

1. the wet tissue for escaping during fire, it is characterized in that impregnated of the nonwoven carrier after the Chinese herbal medicine solution having and produce refreshing effect to the mind, the at least one side of described nonwoven carrier is covered with the thin polymer film containing hydrophilic functional groups that a layer thickness is 0.1um-1mm, described Chinese herbal medicine solution is mixed by peppermint, cloves and water, and the weight ratio of various component is: peppermint 0.1-5wt%, cloves 0.1-5wt%, water are surplus; Add in described nonwoven carrier and there is the activated carbon or titanium dioxide absorption particle that are absorbed with poisonous gas function;

Described thin polymer film is polyvinyl alcohol film, and the degree of hydrolysis of polyvinyl alcohol used is more than 80%, and the thickness of polyvinyl alcohol film is 1um-100um;

And adopting the technological process of spin-coating to be: a certain amount of polyvinyl alcohol being added temperature is in the hot water of 90 DEG C-100 DEG C, configuration concentration is the PVOH aqueous solution of 5%-80wt%, adopt whirler by polyvinyl alcohol uniform deposition in nonwoven surface, subsequently, air oxygen detrition, makes polyvinyl alcohol be deposited on nonwoven surface.

2. wet tissue according to claim 1, is characterized in that the mass percent of peppermint and cloves in described Chinese herbal medicine solution is 1wt%.

3. the preparation method of wet tissue for escaping during fire, is characterized in that step is:

1) using non-woven fabrics as the base material of carrier, by spin-coating method, the thin polymer film containing hydrophilic functional groups is coated on nonwoven surface, makes the thickness of thin polymer film between 0.1um-1mm;

2) Chinese herbal medicine solution is prepared: at 0-50 DEG C, be that surplus is prepared according to mass percent peppermint 0.1-5wt%, cloves 0.1-5wt%, water;

3) impregnated in Chinese herbal medicine solution by the non-woven fabrics be coated with thin polymer film, time 1min-2h, obtains final products;

The technological process of spin-coating is: a certain amount of polyvinyl alcohol being added temperature is in the hot water of 90 DEG C-100 DEG C, configuration concentration is the PVOH aqueous solution of 5%-80wt%, adopt whirler by polyvinyl alcohol uniform deposition in nonwoven surface, subsequently, air oxygen detrition, makes polyvinyl alcohol be deposited on nonwoven surface and forms polyvinyl alcohol film;

Described step 1) non-woven fabrics in be added with the activated carbon or titanium dioxide absorption particle that have and be absorbed with poisonous gas function.

4. preparation method according to claim 3, is characterized in that the thickness of described polyvinyl alcohol film is between 1um-100um.

5. preparation method according to claim 3, is characterized in that described step 2) preparation Chinese herbal medicine solution temperature be 5-25 DEG C, in Chinese herbal medicine solution, the mass percent of peppermint and cloves is 1wt%.

6. preparation method according to claim 3, is characterized in that described step 3) the non-woven fabrics time that impregnated in Chinese herbal medicine solution be 10min-1h.