CN214727001U - High-breathability basement membrane for hygienic products - Google Patents
High-breathability basement membrane for hygienic products Download PDFInfo
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- CN214727001U CN214727001U CN202120255966.5U CN202120255966U CN214727001U CN 214727001 U CN214727001 U CN 214727001U CN 202120255966 U CN202120255966 U CN 202120255966U CN 214727001 U CN214727001 U CN 214727001U
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Abstract
The utility model discloses a highly breathable sanitary article basement membrane, which is formed by laminating a carrier layer and a melt-blown layer; the square meter gram weight of the melt-blown layer is 15-35, the square meter gram weight of the carrier layer is 13-40, the self weight can be effectively minimized under the condition of not influencing the air permeability of the basement membrane, the moisture permeability of the basement membrane formed by compounding the online melt-blown layer and the non-woven fabric can reach 4000g/m2/24hr, and the water pressure resistance can reach more than 30 mbar.
Description
Technical Field
The utility model relates to a bottom film of a sanitary article, in particular to a highly breathable bottom film of a sanitary article.
Background
In the real life, the sanitary/protective products such as paper diapers, sanitary napkins and protective clothing are daily articles of daily use in contact, and with the development of society, the consumption demand of people on the disposable sanitary/protective products becomes more and more common, and the requirements on the comfort and the safety of the disposable sanitary/protective products become higher and higher, wherein the air permeability of the products is also one of the important indexes for measuring the quality of the products, and the products with poor air permeability can cause consumers to feel stuffy and wet easily due to the reason that water vapor is not easy to diffuse when the products are used, and can also easily cause the breeding of a large number of microorganisms, thereby affecting the physical and mental health of the consumers.
In order to improve the air permeability of products, disposable sanitary products such as diapers, sanitary towels, breast pads and the like on the market at present generally use a PE (polyethylene) breathable film as a component material of a basement membrane, and disposable non-woven fabric protective clothing adopts the PE breathable film and spun-bonded non-woven fabric to be compounded into a manufacturing material in order to have certain air permeability; because the PE breathable film is formed by mixing calcium carbonate with various types of polyethylene and micropores are generated by stretching, if the process is improperly controlled, the phenomenon of calcium carbonate powder precipitation is easy to occur, so that foreign matter pollution is caused, the moisture permeability of the breathable material is generally between 1500-3000g/m2/24hr, the moisture permeability is increased, the stretching multiple is inevitably increased, if the breathable film is stretched excessively, irregular changes such as enlargement of local holes of the breathable film are easily caused, and the phenomenon of leakage of the produced product is easily caused.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides a highly breathable basement membrane of a hygienic article.
The utility model provides a technical scheme that its technical problem adopted is:
a highly breathable basement membrane of a sanitary article is formed by hot-pressing, on-line thermal bonding or ultrasonic pressing of a carrier layer and a melt-blown layer; the square meter gram weight of the melt-blown layer is 15-35, and the square meter gram weight of the carrier layer is 13-40.
The hot-melt spraying device is characterized in that the hot-melt spraying layer and the carrier layer are formed by hot-press bonding, and a hot-melt adhesive layer is locally coated between the hot-melt spraying layer and the carrier layer.
The amount of the hot melt adhesive layer is 1-6 g per square.
The utility model has the advantages that: the utility model is formed by hot pressing, on-line heat bonding or ultrasonic pressing of a carrier layer and a melt-blown layer; the square meter gram weight of the melt-blown layer is 15-35, the square meter gram weight of the carrier layer is 13-40, the self weight can be effectively minimized under the condition of not influencing the air permeability of the basement membrane, the moisture permeability of the basement membrane formed by compounding online melt-blown and non-woven fabrics can reach 4000g/m2/24hr, the water pressure resistance can reach more than 30mbar, the basement membrane has the advantages of water resistance, high air permeability and small self weight, and is suitable for the basement membrane composition materials of disposable sanitary products such as protective clothing, diapers, sanitary towels, breast pads and the like.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;
fig. 2 is a schematic structural view of a second embodiment of the present invention;
FIG. 3 is a flow chart of a manufacturing method according to a first embodiment of the present invention;
FIG. 4 is a flow chart of a first manufacturing method according to a second embodiment of the present invention;
fig. 5 is a flowchart of a second production method according to a second embodiment of the present invention.
Detailed Description
The first embodiment is as follows:
referring to fig. 1, a highly breathable bottom film of a hygienic article is formed by hot-pressing a carrier layer 2 and a melt-blown layer 1; the square meter grammes per square metre of melt-blown layer 1 is 15-35, the square meter grammes per square metre of carrier layer 2 is 13-40, can make the weight of self reach minimum effectively under the condition that does not influence basement membrane gas permeability, melt-blown layer 1 is melt-blown by the polypropylene master batch and constitutes, carrier layer 2 adopts spunbonded nonwoven or hot-air non-woven fabrics to constitute, through the basement membrane that melts the complex of online melt-blown and non-woven fabrics and form, its moisture permeability can reach 4000g/m2/24hr, and water pressure resistance can reach more than 30 mbar.
The hot-melt spraying device is characterized in that the hot-melt spraying layer 1 and the carrier layer 2 are formed by hot pressing, and a hot-melt adhesive layer 3 is locally coated between the hot-melt spraying layer 1 and the carrier layer 2.
The glue distribution amount of the hot melt glue layer 3 is 1-6 g per square, so that the bonding strength of the melt-blown layer 1 and the carrier layer 2 can be increased.
Referring to fig. 3, a method for manufacturing a highly breathable bottom film of a hygienic article comprises the following steps:
(1) and after the polypropylene master batch is extracted, heating and melting molding are carried out, wherein the temperature is 150-250 ℃.
(2) And extruding the formed raw materials into filaments after metering and conveying, wherein the temperature for extruding into filaments is 200-240 ℃.
(3) Hot air stretching the raw material to be formed into filaments; the adopted temperature is 180-300 ℃, the hot air speed is 1000-1300m/min, and the effect of stretching the polypropylene master batch is optimal.
(4) The non-woven fabric is extracted to be a carrier layer, and the carrier layer is locally glued through glue scraping or roller glue mode to form a hot melt glue layer.
(5) And after the stretched raw material melt-spraying material is arranged on the carrier layer which is coated with the glue, the stretched raw material melt-spraying material and the carrier layer are placed on a supporting net for cooling, and the raw material is cooled into a melt-spraying layer by blowing cold air at the wind speed of 800-.
(6) Hot-pressing the melt-blown layer, the hot-melt adhesive layer and the carrier layer, and then rolling, slitting and packaging; the geometric patterns are generated during pressing, so that the local gluing in the step 4 can be implemented in a glue scraping mode, the hot melt glue layer is in a block-surface-shaped pattern in the carrier layer, a roller-transferring glue distribution mode can also be adopted, the pattern can be formed in a hollow shape in the mode, namely the hot melt glue layer is in a frame pattern in the carrier layer, and the specific hot pressing mode comprises the following four modes:
1. after the raw materials are melt-sprayed onto the carrier layer (non-woven fabric) to form a melt-sprayed layer, the melt-sprayed layer is combined by flat pressing and rolling, the melt-sprayed layer has no patterns, the temperature of the pressing roll is 30-100 ℃, the pressure is 0.5-3kg/cm2, and the bonding strength is 0.5-3N.
2. After the raw materials are melt-sprayed onto the carrier layer (non-woven fabric) to form a melt-sprayed layer, the melt-sprayed layer is pressed and combined through a group of pattern rollers, the melt-sprayed layer has patterns, the pressing roller temperature is 50-130 ℃, the pressure is 0.5-3.5kg/cm2, and the bonding strength is 1-4N.
3. After the carrier layer (non-woven fabric) is glued, the glue is melt-blown and sprayed on the carrier layer to form a melt-blown layer, and then the melt-blown layer is combined through a flat pressing roller, wherein the temperature of the pressing roller is 30-100 ℃, the pressure is 0.5-3kg/cm2, the melt-blown layer has no patterns, and the combination strength is 1-4N.
4. After the carrier layer (non-woven fabric) is glued, the carrier layer (non-woven fabric) is melt-blown and sprayed on the material to form a melt-blown layer, and the melt-blown layer is combined by a patterned roller, the hot-pressing temperature is 50-130 ℃, the pressure is 0.5-3.5kg/cm2, the melt-blown layer has patterns, and the combination strength is 1.5-5N.
Example two:
referring to fig. 2, a highly breathable bottom film of a hygienic article is formed by on-line thermal bonding or ultrasonic lamination of a carrier layer 2 and a melt-blown layer 1; the square meter grammes per square metre of melt-blown layer 1 is 15-35, the square meter grammes per square metre of carrier layer 2 is 13-40, can make the weight of self reach minimum effectively under the condition that does not influence basement membrane gas permeability, melt-blown layer 1 is melt-blown by the polypropylene master batch and constitutes, carrier layer 2 adopts spunbonded nonwoven or hot-air non-woven fabrics to constitute, through the basement membrane that melts the complex of online melt-blown and non-woven fabrics and form, its moisture permeability can reach 4000g/m2/24hr, and water pressure resistance can reach more than 30 mbar.
Referring to fig. 4, a method for manufacturing a highly breathable bottom film of a hygienic article comprises the following steps:
(1) and extracting the polypropylene master batch to perform heating melting molding at the temperature of 150-250 ℃.
(2) And extruding the formed raw materials into filaments after metering and conveying, wherein the temperature for extruding into filaments is 200-240 ℃.
(3) And hot air stretching is carried out on the raw materials for forming the filaments, the adopted temperature is 180-300 ℃, the hot air speed is 1000-1300m/min, and the effect of stretching the polypropylene master batch is optimal.
(4) And taking out the rolled non-woven fabric as a carrier layer, and spraying the stretched raw material on the carrier layer.
(5) And placing the carrier layer loaded with the raw materials on a supporting net for cooling, and blowing cold air at the wind speed of 800-.
(6) Carrying out ultrasonic lamination on the melt-blown layer, the hot-melt adhesive layer and the carrier layer, and then rolling, slitting and packaging; the pressing produces a geometric pattern.
Referring to fig. 5, a second method for preparing a base film for a highly breathable sanitary article, comprises the steps of:
(1) after the polypropylene master batch is extracted, heating, melting and molding are carried out;
(2) extruding the formed raw materials into filaments after metering and conveying;
(3) hot air stretching the raw material to be formed into filaments;
(4) extracting the non-woven fabric as a carrier layer, and spraying the stretched raw material on the carrier layer;
(5) placing the carrier layer loaded with the raw materials on a supporting net for cooling, and blowing cold air to cool the raw materials into a melt-blown layer;
(6) and adopting a composite roller and utilizing the residual heat of the melt-blown layer to carry out rolling, slitting and packaging after the melt-blown layer and the carrier layer are subjected to online thermal bonding.
The method utilizes the adhesiveness of the melt-blown layer and the residual heat of the melt-blown layer after the melt-blown layer is cooled by the supporting net, and the composite roller is used for pressing without adopting an ultrasonic die head or a glue distribution hot-pressing mode, so that the production process is simpler and more convenient.
It should be noted that in all the examples, a screw extruder can be used for heating, melting, metering and conveying, and die spinning through a die spinning die.
The above embodiments are not intended to limit the scope of the present invention, and those skilled in the art can make modifications and variations equivalent without departing from the overall concept of the present invention.
Claims (2)
1. A highly breathable basement membrane of a sanitary article is characterized by being formed by hot-pressing, on-line thermal bonding or ultrasonic pressing of a carrier layer (2) and a melt-blown layer (1); the gram weight of the melt-blown layer (1) is 15-35 in square meter, and the gram weight of the carrier layer (2) is 13-40 in square meter; melt and spout layer (1) with hot pressing forms between carrier layer (2), melt and spout layer (1) with local coating has hot melt adhesive layer (3) between carrier layer (2).
2. A highly breathable sanitary napkin carrier film according to claim 1, wherein said hot melt adhesive layer (3) is applied in an amount of between 1 and 6 grams per square.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120255966.5U CN214727001U (en) | 2021-01-29 | 2021-01-29 | High-breathability basement membrane for hygienic products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120255966.5U CN214727001U (en) | 2021-01-29 | 2021-01-29 | High-breathability basement membrane for hygienic products |
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| Publication Number | Publication Date |
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| CN214727001U true CN214727001U (en) | 2021-11-16 |
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| CN202120255966.5U Active CN214727001U (en) | 2021-01-29 | 2021-01-29 | High-breathability basement membrane for hygienic products |
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2021
- 2021-01-29 CN CN202120255966.5U patent/CN214727001U/en active Active
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