阅读说明：本技术 一种透气吸水树脂及其制备方法和防尘防毒口罩 (Breathable water-absorbent resin, preparation method thereof and dustproof and gas-defense mask ) 是由 杨金明 于 2020-12-17 设计创作，主要内容包括：本发明公开了一种透气吸水树脂,按照重量份数包括以下各组分：淀粉50-60份；PTFE28-34份；偶联剂2-3份；淀粉增塑剂18-26份；本发明与现有技术相比,通过淀粉增塑剂来对淀粉进行改性,从而使淀粉具有优异的可塑性,然后通过偶联剂来使改性后的淀粉与PTFE发生交联反应,合理利用淀粉的强吸水性能以及PTFE的透气、过滤等性能来制备本透气吸水树脂,将本透气吸水树脂加工成透气膜块后热熔在口罩的内层上,能够快速的对佩戴者嘴中呼出的水蒸汽中的水分进行吸附,提高了佩戴者的佩戴舒适感以及口罩的透气效果。(The invention discloses a breathable water-absorbent resin which comprises the following components in parts by weight: 50-60 parts of starch; 28-34 parts of PTFE; 2-3 parts of a coupling agent; 18-26 parts of a starch plasticizer; compared with the prior art, the invention modifies starch through the starch plasticizer, so that the starch has excellent plasticity, then the modified starch and PTFE generate a cross-linking reaction through the coupling agent, the breathable water-absorbent resin is prepared by reasonably utilizing the strong water-absorbing performance of the starch and the air permeability, filtration and other performances of the PTFE, the breathable water-absorbent resin is processed into the breathable film block and then is hot-melted on the inner layer of the mask, the moisture in the water vapor exhaled from the mouth of a wearer can be rapidly adsorbed, and the wearing comfort of the wearer and the ventilation effect of the mask are improved.)

1. The breathable water-absorbing resin is characterized by comprising the following components in parts by weight:

2. the breathable water-absorbent resin according to claim 1, wherein: the starch plasticizer comprises urea, formamide and glycerol which are mixed according to a ratio of 2: 1: (1.5-2).

3. The breathable water-absorbent resin according to claim 1, wherein: the coupling agent is maleic anhydride or maleic anhydride.

4. A method for preparing the breathable water-absorbent resin according to any one of claims 1 to 3, characterized by comprising the steps of:

s1, weighing the components in proportion, adding starch and a starch plasticizer into a high-speed mixer, mixing for 10-14min, and adding the mixture into an open mill to plasticize the pull tabs;

s2, adding the product prepared in the step S1, PTFE and a coupling agent into a high-speed mixer, and mixing for 12-16 min;

s3, adding the mixture mixed in the step S2 into a double-screw extruder for extrusion processing, wherein the screw rotating speed of the double-screw extruder is 90-100r/min, and the extrusion temperature is 100-120 ℃.

5. A dustproof and gas-defense mask comprises a mask body consisting of an inner protective layer, a filter layer and an outer protective layer, and is characterized in that the filter layer is clamped between the inner protective layer and the outer protective layer in a wavy manner, one side of the inner protective layer, which is far away from the filter layer, is positioned at the contact position of a mouth when the mask is worn, and a breathable water absorption block is arranged at the middle part of the breathable water absorption block, which is sunken towards one side close to the outer protective layer;

the breathable water absorption block is formed by melting the breathable water absorption resin according to any one of claims 1 to 3 and then pressing the melted breathable water absorption resin through a die.

6. The respirator of claim 5, wherein: still include two hangers portions of connecting on the gauze mask body, two hangers are arranged on the side of gauze mask body in opposite directions mutually, and every hanger portion all includes inside hollow hangers thread, and the both ends of hangers thread all link to each other with the gauze mask body, and it has the perforation to open on the one end outer wall of hangers thread, keeps away from the one end fixedly connected with regulation line that passes the hole in the hangers thread, and the free end of regulation line freely passes and arranges the outside in the hangers thread after perforating, and the free end fixedly connected with bonding piece of regulation line.

7. The respirator of claim 5, wherein: the filter layer is a filter membrane formed by pressing a polyethylene resin and a PTFE membrane after mixing and processing.

Technical Field

The invention relates to the technical field of medical protective products, in particular to a breathable water-absorbent resin, a preparation method thereof and a dustproof and gas-defense mask.

Background

Because of the strong transmission capacity of the novel coronavirus and the large number of infected people, the shortage of medical materials appears in succession in the world, and the current key material demands are divided into five categories, wherein the key protective articles such as medical protective clothing, medical protective mask and the like belong to the first category of materials which are very short in supply, so that medical staff fighting at the first line of epidemic prevention are threatened to be greatly infected. Therefore, the quantity and quality of medical protective clothing and medical protective mask have become key factors for global prevention and control of new coronary pneumonia epidemic situations.

Although the existing protective mask has a certain protective performance, in the using process, the mask is easily adhered to the mouth of a wearer, and the mouth can generate a large amount of water vapor in the exhausting process, the inner layer of the mask is generally made of non-woven fabrics, the water vapor is gathered on the non-woven fabrics to wet the non-woven fabrics, and the water absorption effect of the non-woven fabrics is poor, so that the wearing comfort of the wearer and the ventilation effect of the mask are seriously affected.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a breathable water-absorbing resin to solve the problem that the wearing comfort of a wearer and the breathable effect of a mask are seriously affected because an inner layer of the mask is made of non-woven fabric and the non-woven fabric has poor water-absorbing effect in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme: the breathable water-absorbing resin comprises the following components in parts by weight:

50-60 parts of starch;

28-34 parts of PTFE;

2-3 parts of a coupling agent;

18-26 parts of a starch plasticizer.

Compared with the prior art, the invention has the following beneficial effects:

according to the breathable water-absorbent resin, starch is modified through the starch plasticizer, so that the starch has excellent plasticity, the modified starch and PTFE are subjected to a cross-linking reaction through the coupling agent, the breathable water-absorbent resin is prepared by reasonably utilizing the strong water absorption performance of the starch and the ventilation and filtration performances of the PTFE, the breathable water-absorbent resin is processed into a breathable film block and then is hot-melted on the inner layer of the mask, the moisture in water vapor exhaled from the mouth of a wearer can be quickly adsorbed, and the wearing comfort of the wearer and the ventilation effect of the mask are improved.

Further, the starch plasticizer comprises urea, formamide and glycerol which are mixed according to the proportion, wherein the proportion of the urea, the formamide and the glycerol is 2: 1: (1.5-2).

Further, the coupling agent is maleic anhydride or maleic anhydride.

In order to efficiently process the breathable water-absorbent resin with high quality, the invention also adopts the following technical scheme: a preparation method of breathable water-absorbent resin comprises the following steps:

s1, weighing the components in proportion, adding starch and a starch plasticizer into a high-speed mixer, mixing for 10-14min, and adding the mixture into an open mill to plasticize the pull tabs;

s2, adding the product prepared in the step S1, PTFE and a coupling agent into a high-speed mixer, and mixing for 12-16 min;

s3, adding the mixture mixed in the step S2 into a double-screw extruder for extrusion processing, wherein the screw rotating speed of the double-screw extruder is 90-100r/min, and the extrusion temperature is 100-120 ℃.

The preparation method of the breathable water-absorbent resin comprises the steps of fully mixing starch and a starch plasticizer, and then modifying the starch in an open mill by the starch plasticizer to enhance the plasticity of the starch; the modified starch plasticizing pull sheet is conveniently and rapidly mixed with PTFE and a coupling agent uniformly in a follow-up manner through an open mill, and then the breathable water-absorbent resin is prepared through a double-screw extruder.

In order to enhance the water absorption effect, the ventilation effect and the filtering sterilization effect of the mask and enhance the wearing comfort of a wearer, the invention also adopts the following technical scheme: a dustproof and gas-defense mask comprises a mask body consisting of an inner protective layer, a filter layer and an outer protective layer, wherein the filter layer is clamped between the inner protective layer and the outer protective layer in a wavy manner, one side of the inner protective layer, far away from the filter layer, is positioned at the contact position of a mouth when the mask is worn and is provided with a breathable water absorption block, and the middle part of the breathable water absorption block is sunken towards one side close to the outer protective layer;

the breathable water absorption block is formed by melting the breathable water absorption resin and then pressing the melted breathable water absorption resin through a die.

The dustproof and gas-defense mask prepared by the invention is characterized in that the filter layer is arranged into a wavy shape and then is clamped between the inner protective layer and the outer protective layer so as to improve the air permeability of the mask, and when the dustproof and gas-defense mask is worn, the mask body is separated from the mouth of a wearer by the breathable water absorption block, so that the air permeability of the mask can be further improved; meanwhile, the dustproof and anti-poison mask is processed and manufactured by the breathable water-absorbent resin prepared by the method, so that the breathable water-absorbent block has certain water-absorbing, breathable and filter-sterilization performances, and the water-absorbing effect, the breathable effect and the filter-sterilization effect of the dustproof and anti-poison mask are improved; and the middle part of the breathable water absorption block is sunken towards one side close to the outer protective layer, the breathable water absorption block is in round contact with the outer side of the mouth of a wearer, and the middle part of the breathable water absorption block is not in contact with the main breathing air position of the mouth of the wearer, so that the breathability of the mask is further improved.

Drawings

FIG. 1 is a schematic view of the construction of the respirator of the present invention;

fig. 2 is a partial cross-sectional view taken along line a-a of fig. 1.

Detailed Description

The present invention will be described in further detail below by way of specific embodiments:

reference numerals in the drawings of the specification include: the mask comprises a mask body 1, an inner protective layer 11, a filter layer 12, an outer protective layer 13, a suspension loop part 2, a suspension loop main line 21, an adjusting line 22, an adhesive block 23 and a breathable water absorption block 3.

Example 1

The embodiment of the invention provides a breathable water-absorbent resin which comprises the following components in parts by weight: 50 parts of starch, 28 parts of PTFE, 2 parts of maleic anhydride, 7.2 parts of urea, 3.6 parts of formamide and 7.2 parts of glycerol.

Example 2

The embodiment of the invention provides a breathable water-absorbent resin which comprises the following components in parts by weight: 60 parts of starch, 34 parts of PTFE, 3 parts of maleic anhydride, 11.6 parts of urea, 5.8 parts of formamide and 8.6 parts of glycerol.

Example 3

The embodiment of the invention provides a breathable water-absorbent resin which comprises the following components in parts by weight: 54 parts of starch, 30 parts of PTFE, 2.5 parts of maleic anhydride, 8.8 parts of urea, 4.4 parts of formamide and 6.8 parts of glycerol.

Example 4

The embodiment of the invention provides a breathable water-absorbent resin which comprises the following components in parts by weight: 58 parts of starch, 28 parts of PTFE, 3 parts of maleic anhydride, 8.8 parts of urea, 4.4 parts of formamide and 8.8 parts of glycerol.

Example 5

The embodiment of the invention provides a breathable water-absorbent resin which comprises the following components in parts by weight: 53 parts of starch, 32 parts of PTFE, 2.7 parts of maleic anhydride, 9.8 parts of urea, 4.9 parts of formamide and 7.3 parts of glycerol.

The above examples 1-5 were all prepared by the following process, including the steps of:

s1, weighing the components in proportion, adding starch and a starch plasticizer consisting of urea, formamide and glycerol into a high-speed mixer, mixing for 10-14min, and adding the mixture into an open mill to plasticize the pull piece;

s2, adding the product prepared in the step S1, PTFE and a coupling agent into a high-speed mixer, and mixing for 12-16min, wherein the coupling agent is maleic anhydride or maleic anhydride;

s3, adding the mixture mixed in the step S2 into a double-screw extruder for extrusion processing, thereby obtaining the breathable water-absorbent resin, wherein the screw rotating speed of the double-screw extruder is 90-100r/min, and the extrusion temperature is 100-120 ℃.

The urea, the formamide and the glycerol have a synergistic effect to form hydrogen bonds with hydroxyl groups in starch molecules so as to reduce the density of the hydrogen bonds in and among the starch molecules and reduce the intermolecular force of the starch; the starch can be modified only by urea and formamide, but the activity of the molecular chain segment of the starch is limited, so that the obtained plastic starch is relatively brittle and hard, the internal stress and the microscopic defects generated in the forming and sample preparation processes are not easy to relax and close, and the breaking strength and the elongation of the material are not high; the glycerol is added to form weak hydrogen bonds with the starch, so that the average strength of the hydrogen bonds in the system is reduced, and the glycerol with larger volume and formamide form the isolation effect of glycerol formate, so that molecular grids in the system are relatively loose, the activity of macromolecular chain segments is enhanced, the obtained plastic starch is tougher, internal stress and micro defects generated in the forming and sample preparation processes are easy to relax and close, and the breaking strength and the elongation of the material are greatly improved.

The dustproof and gas-proof mask comprises a mask body consisting of an inner protective layer, a filter layer and an outer protective layer, wherein the filter layer is clamped between the inner protective layer and the outer protective layer in a wavy manner, a breathable water absorption block is arranged at the contact position of the mouth when the mask is worn on one side of the inner protective layer away from the filter layer, and the middle part of the breathable water absorption block is sunken towards one side close to the outer protective layer;

the breathable water absorption block is formed by melting the breathable water absorption resin in any one of the embodiments 1-5 and then pressing the melted breathable water absorption resin by a mold.

The dustproof and gas-proof mask comprises a mask body 1 consisting of an inner protective layer 11, a filter layer 12 and an outer protective layer 13, wherein the filter layer 12 is clamped between the inner protective layer 11 and the outer protective layer 13 in a wavy manner, a breathable water absorption block 3 is arranged at the contact position of a mouth when the mask is worn on one side of the inner protective layer 11 away from the filter layer 12, and the middle part of the breathable water absorption block 3 is sunken towards one side close to the outer protective layer 13;

the breathable water absorption block 3 is formed by melting the breathable water absorption resin in any one of the embodiments 1 to 5 and then pressing the melted breathable water absorption resin by a mold.

The dustproof and gas-defense mask prepared by the invention is characterized in that the filter layer 12 is arranged into a wave shape and then is clamped between the inner protective layer 11 and the outer protective layer 13 so as to improve the air permeability of the mask, and when the dustproof and gas-defense mask is worn, the mask body 1 is separated from the mouth part of a wearer by the breathable water absorption block 3, so that the air permeability of the mask can be further improved; meanwhile, the dustproof and anti-poison mask is processed and manufactured by the breathable water-absorbent resin prepared by the invention, so that the breathable water-absorbent block 3 has certain water-absorbing, breathable and filter-sterilization performances, and the water-absorbing effect, the breathable effect and the filter-sterilization effect of the dustproof and anti-poison mask are improved; and the middle part of the breathable water absorption block 3 is sunken towards one side close to the outer protection layer 13, the breathable water absorption block 3 is in round contact with the outer side of the mouth of a wearer, and the middle part of the breathable water absorption block 3 is not in contact with the main breathing air position of the mouth of the wearer, so that the ventilation performance of the mask is further improved.

The dustproof and gas-defense mask prepared by the invention also comprises two lug hanging parts 2 connected on the mask body 1, wherein the two lug hanging parts 2 are oppositely arranged on the side edge of the mask body 1, each lug hanging part 2 comprises a lug main line 21 with a hollow inner part, two ends of the lug main line 21 are connected with the mask body 1, a through hole is formed in the outer wall of one end of the lug main line 21, one end, far away from the through hole, in the lug main line 21 is fixedly connected with an adjusting line 22, the free end of the adjusting line 22 freely penetrates through the through hole and then is arranged on the outer side of the lug main line 21, and the free end of the adjusting line 22 is fixedly connected with a bonding block 23.

When a wearer is matched, after the two ear hanging parts 2 are hung on the two ears, the free end of the adjusting wire 22 is taken and pulled towards the direction of the fixed end of the adjusting wire to enable the ear hanging main wire 21 to contract, so that the tightness of the ear hanging main wire 21 is adjusted to meet the requirements of different wearers, the dustproof and gas mask can be firmly matched, the mask can well seal the face of the wearer, and the protection performance of the mask is improved;

then the bonding block 23 is bonded on the outer side of the hanger main line 21, so that the adjusted hanger main line 21 is fixed; when the tightness of the hanger main line 21 needs to be readjusted, the bonding block 23 and the outer side of the hanger main line 21 are separated from the bonding state, and then the adjustment can be performed again, so that the method is convenient and fast.

A protective film may be attached to the adhesive block 23, and the adhesive block 23 may be used after the protective film is torn off from the adhesive block 23.

The filter layer 12 is a filter membrane formed by pressing a polyethylene resin and a PTFE membrane after mixing processing, so that the filter membrane has good air permeability and filter sterilization performance.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.