CN111546743A - Rubber roller for preparing microporous composite film - Google Patents
Rubber roller for preparing microporous composite film Download PDFInfo
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- CN111546743A CN111546743A CN202010394075.8A CN202010394075A CN111546743A CN 111546743 A CN111546743 A CN 111546743A CN 202010394075 A CN202010394075 A CN 202010394075A CN 111546743 A CN111546743 A CN 111546743A
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- China
- Prior art keywords
- coating layer
- composite film
- grooves
- rubber
- microporous composite
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/0046—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by constructional aspects of the apparatus
- B32B37/0053—Constructional details of laminating machines comprising rollers; Constructional features of the rollers
Abstract
A rubber roll for preparing a microporous composite film comprises a metal roll core and a coating layer, wherein the coating layer is annularly distributed and wrapped on the outer layer of the metal roll core, and the coating layer is cylindrical; the surface of the coating layer is annularly distributed and provided with a plurality of grooves at certain intervals; the density of the grooves on the surface of the cladding layer is reduced in a gradient manner from the middle to the two ends, and the metal roller core is arranged on a rubber roller mounting station of the rubber roller compounding equipment. The invention combines the existing stretching process to prepare the microporous composite membrane. In application, the glue amount of the glue roller compounding equipment is adjusted, the overall stability of the finished microporous composite film product can be effectively adjusted and controlled, and the distribution difference of the middle and two sides air permeability is reduced, so that the air permeability of the finished microporous composite film product is uniformly distributed, and the performance of a terminal product manufactured by using the composite film is more stable and reliable. Based on the above, the invention has good application prospect.
Description
Technical Field
The invention relates to the technical field of equipment for preparing and using a breathable film, in particular to a rubber roller for preparing a microporous composite film.
Background
The microporous breathable film is a high polymer material. The microporous breathable film is widely applied to the industrial and civil fields, and in practical application, gas at one sealed side end of the microporous breathable film can permeate to the other side, so that the microporous breathable film generates a gas permeation phenomenon. In the prior art, the microporous breathable film is mainly prepared by adopting a stretching process. The preparation process generally comprises the procedures of casting extrusion, stretching, heat setting film forming and the like. Wherein, the flow casting extrusion process is to blend, extrude and granulate raw materials to prepare breathable particles; the extrusion procedure is that the air-permeable particles are extruded and melted by a casting extruder, and the melt is continuously extruded into a film through a die lip gap of a T-shaped die head of a casting machine; the stretching process is to stretch the film by a single axial one-step method or a two-step method; the heat setting film forming process is to set the stretched film in a setting machine to obtain the microporous polyolefin breathable film product.
The method is limited by the existing stretching process, and in the preparation process, the phenomena of non-uniform stretching rate and non-uniform thickness of the whole film can be generated due to the non-uniform stress and different shrinkage rates of the middle part and the two sides of the breathable film, so that the air permeability of the breathable film product is non-uniform due to the fact that the middle part of the breathable film is larger than the air permeability of the two sides (the middle micropores are larger and the micropores of the two sides are smaller), especially the defect that the middle part of the breathable film is higher than the air permeability of the two sides in the transverse direction can affect the.
The prepared microporous breathable film and non-woven fabric are pressed and compounded by using glue by a glue roller transfer method after the stretching and heat setting film forming procedures, so that the obtained microporous composite film finished product has enough strength, and can effectively adjust and control the overall stability of the microporous composite film finished product and reduce the distribution difference of the middle and two sides of the permeability, thereby ensuring that the permeability of the microporous composite film finished product is uniformly distributed, and thus, the performance of a terminal product manufactured by using the microporous composite film finished product is more stable and reliable (see another patent filed by the applicant on the same day and named a microporous composite film with uniform permeability). In the preparation of the microporous composite film finished product, the rubber roll transfer method needs to adopt the existing rubber roll compounding equipment (when the existing rubber roll compounding equipment compounds the processed product, the two products can be automatically glued and pressed, and the like, so that the two products are compounded together) to carry out pressing compounding treatment on the breathable film and the non-woven fabric which are subjected to stretching and heat setting film forming preparation by using glue. The rubber roller of the existing rubber roller compounding equipment is a main component of the rubber roller compounding equipment, the rubber roller is a roller-shaped product which is prepared by taking metal or other materials as a core and coating rubber outside by vulcanization, and the rubber roller can be divided into a papermaking rubber roller, a printing and dyeing rubber roller, a printing rubber roller, a rice hulling rubber roller, a metallurgy rubber roller, an mimeographing rubber roller and the like according to the application; the materials can be divided into butyl rubber rollers, butyronitrile rubber rollers, polyurethane rubber rollers, silicon rubber rollers and the like. Because the structure of the existing rubber roller is limited, the rubber roller does not have micropores matched with the microporous breathable film, and after the prepared microporous breathable film and the non-woven fabric are directly glued, pressed and compounded, the obtained microporous composite film finished product also has the problem of uneven ventilation distribution, and the stability requirement of other products related to the application of the breathable film is difficult to meet.
Disclosure of Invention
In order to overcome the defects that the microporous breathable film prepared by the stretching and heat setting film forming procedures is directly compounded with non-woven fabric because the existing rubber roll compounding equipment is limited by the rubber roll structure and does not have micropores adaptive to the microporous breathable film, the obtained microporous composite film finished product also has uneven air permeability distribution and is difficult to meet the stability requirement of other products related to the application of the breathable film, the invention provides the rubber roll with the metal roll core and the coating layer, the surface of the coating layer is carved with the groove, the air permeability in the microporous breathable film and non-woven fabric compounding preparation is adjusted by changing the distribution density of the groove, the deviation of the air permeability of the breathable film is compensated by the using amount of the rubber in production, the integral stability of the breathable film can be effectively adjusted and controlled, and the distribution difference of the air permeability in the middle and two sides is reduced, so that the air permeability of, the rubber roller for preparing the microporous composite film has more stable and reliable performance of the terminal product manufactured by using the composite film.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the rubber roll for preparing the microporous composite film comprises a metal roll core and a coating layer, and is characterized in that the coating layer is annularly distributed and wrapped on the outer layer of the metal roll core, the length of the metal roll core is greater than that of the coating layer, and the coating layer is cylindrical; the surface of the coating layer is annularly distributed and provided with a plurality of grooves at certain intervals; the density of the grooves on the surface of the cladding layer is reduced in a gradient manner from the middle to the two ends, and the density change formula of the grooves on the surface of the cladding layer is that y is +/-0.11 x + 30; the metal roller core is arranged on a rubber roller mounting station of the rubber roller compounding equipment.
Further, in the density variation formula of the grooves, y is the distribution density of the grooves on the surface of the cladding layer, and x is the transverse position.
Furthermore, the width of two adjacent grooves on the surface of the coating layer is 5-10 μm.
Further, the coating material is vulcanized rubber.
Furthermore, the width and depth of the groove on the surface of the cladding layer are approximately consistent with the size and depth of the micropore gap distributed on the surface of the breathable film prepared by the stretching and heat setting film-forming processes.
The invention has the beneficial effects that: the invention combines the existing stretching process to prepare the microporous composite membrane. In the preparation, the microporous breathable film prepared by the casting extrusion, stretching and heat setting film forming processes of the stretching process is combined with non-woven fabrics, and glue applying, pressing and compounding treatment is carried out by adopting rubber roll compounding equipment. Based on the above, the invention has good application prospect.
Drawings
The invention is further illustrated below with reference to the figures and examples.
FIG. 1 is a schematic diagram of the present invention.
FIG. 2 is a graph showing the distribution of the groove density on the surface of the rubber roller.
Detailed Description
As shown in fig. 1 and 2, a rubber roll for preparing a microporous composite film comprises a metal roll core 1 and a coating layer 2, wherein the coating layer 2 is annularly distributed and coated on the outer layer of the metal roll core 1, the length of the metal roll core 1 is greater than that of the coating layer 2, and the coating layer 2 is cylindrical; a plurality of grooves 21 (namely glue grooves) are distributed on the surface of the coating layer 2 at intervals in a ring shape; the density of the grooves 21 on the surface of the coating layer 2 is reduced in a gradient manner from the middle to the two ends, and the density change formula of the grooves 21 on the surface of the coating layer 2 is that y is +/-0.11 x + 30; the metal roller core 1 is arranged on a rubber roller mounting station of the rubber roller compounding equipment.
In the density variation formula of the groove 21 shown in fig. 1 and 2, y is the distribution density (%) of the groove on the surface of the rubber roll (i.e., the coating layer 2), and x is the transverse position (unit: cm, the middle point of the rubber roll is 0). The width of two grooves 21 adjacent to the surface of the clad is 5 μm to 10 μm (7 μm in this example). The material of the coating layer 2 is vulcanized rubber. The width and depth of the groove 21 on the surface of the cladding layer are approximately consistent with the size and depth of the micropore gap distributed on the surface of the breathable film after the film forming process of stretching and heat setting. The distribution density of the grooves 21 on the surface of the coating layer is the area occupied by the coating layer 2 on the coating layer divided by the total area of the grooves 21.
In the application of the present invention, the microporous composite membrane is prepared by combining the existing stretching process as shown in fig. 1 and 2. When in preparation, the materials are blended, extruded and granulated through a tape casting extrusion procedure to prepare breathable particles; then extruding and melting the air-permeable particles by a casting extruder through an extrusion process, and continuously extruding the melt into a film through a die lip gap of a T-shaped die head of a casting machine; then, stretching the film by adopting a stretching process in a single axial one-step method or a two-step method; and the heat setting film forming process is to set the stretched film in a setting machine to obtain the microporous polyolefin breathable film. After the polyolefin microporous breathable film finished product is obtained, the non-woven fabric is combined, and gluing, pressing and compounding treatment is carried out on the non-woven fabric and the microporous breathable film by using rubber roll compounding equipment (the rubber roll compounding equipment with the model of RWT-110, manufactured by Shanghai Huadi machinery Co., Ltd.) so as to obtain a microporous composite film finished product. In the preparation, because the surface of the coating layer 2 is engraved with the groove 21, the air permeability in the composite preparation of the microporous breathable film and the non-woven fabric can be adjusted by changing the distribution density of the groove, the width and the depth of the groove 21 on the surface of the coating layer are nearly consistent with the size and the depth of the micropore gap distributed on the surface of the breathable film after the preparation of the stretching and heat setting film forming procedures, the glue amount used in the composite process (the glue roller composite equipment has the function of controlling the glue amount), the hole in the middle of the microporous breathable film is relatively large, the density is small, the hole in the middle of the microporous breathable film is sealed by using relatively more glue amount, the hole on two sides of the microporous breathable film is relatively small, the density is large, the holes on two sides of the microporous breathable film are sealed by using relatively less glue amount in the composite process, the air permeability in the middle of the micropore and the deviation of two side ends can be effectively compensated, the integral stability of the finished microporous breathable film The distribution difference of the degree, thus leading the air permeability of the finished product of the microporous composite membrane to be distributed evenly, and leading the performance of the terminal product manufactured by the composite membrane to be more stable and reliable.
Having shown and described the essential features of the invention and its advantages, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, the embodiments do not include only one independent technical solution, and such description is only for clarity, and those skilled in the art should take the description as a whole, and the technical solutions in the embodiments may be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims (5)
1. The rubber roll for preparing the microporous composite film comprises a metal roll core and a coating layer, and is characterized in that the coating layer is annularly distributed and wrapped on the outer layer of the metal roll core, the length of the metal roll core is greater than that of the coating layer, and the coating layer is cylindrical; the surface of the coating layer is annularly distributed and provided with a plurality of grooves at certain intervals; the density of the grooves on the surface of the cladding layer is reduced in a gradient manner from the middle to the two ends, and the density change formula of the grooves on the surface of the cladding layer is that y is +/-0.11 x + 30; the metal roller core is arranged on a rubber roller mounting station of the rubber roller compounding equipment.
2. The rubber roll for preparing the microporous composite film according to claim 1, wherein in the formula of the density variation of the grooves, y is the distribution density of the grooves on the surface of the cladding layer, and x is the transverse position.
3. The rubber roller for preparing the microporous composite film according to claim 1, wherein the width of two adjacent grooves on the surface of the coating layer is 5 μm to 10 μm.
4. The rubber roll for preparing the microporous composite film according to claim 1, wherein the coating layer is vulcanized rubber.
5. The rubber roll for preparing the microporous composite film according to claim 1, wherein the width and depth of the groove on the surface of the coating layer are approximately consistent with the size and depth of the micropore gap distributed on the surface of the breathable film after the stretching and heat setting film-forming processes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010394075.8A CN111546743A (en) | 2020-05-11 | 2020-05-11 | Rubber roller for preparing microporous composite film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010394075.8A CN111546743A (en) | 2020-05-11 | 2020-05-11 | Rubber roller for preparing microporous composite film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111546743A true CN111546743A (en) | 2020-08-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010394075.8A Pending CN111546743A (en) | 2020-05-11 | 2020-05-11 | Rubber roller for preparing microporous composite film |
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| CN (1) | CN111546743A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5727831B2 (en) * | 1974-08-27 | 1982-06-12 | ||
| CN1556753A (en) * | 2001-07-20 | 2004-12-22 | ���������ϲ�Ʒ��˾ | Laminated sheet and method of making same |
| CN201406215Y (en) * | 2009-05-05 | 2010-02-17 | 核工业西南物理研究院 | Soft-rubber-faced groove-type flattening roll |
| CN103117369A (en) * | 2013-02-01 | 2013-05-22 | 深圳中兴创新材料技术有限公司 | Composite battery diaphragm |
| CN205112627U (en) * | 2015-11-09 | 2016-03-30 | 中山市金海包装科技有限公司 | Pearly -lustre laser card paper lithography apparatus |
-
2020
- 2020-05-11 CN CN202010394075.8A patent/CN111546743A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5727831B2 (en) * | 1974-08-27 | 1982-06-12 | ||
| CN1556753A (en) * | 2001-07-20 | 2004-12-22 | ���������ϲ�Ʒ��˾ | Laminated sheet and method of making same |
| CN201406215Y (en) * | 2009-05-05 | 2010-02-17 | 核工业西南物理研究院 | Soft-rubber-faced groove-type flattening roll |
| CN103117369A (en) * | 2013-02-01 | 2013-05-22 | 深圳中兴创新材料技术有限公司 | Composite battery diaphragm |
| CN205112627U (en) * | 2015-11-09 | 2016-03-30 | 中山市金海包装科技有限公司 | Pearly -lustre laser card paper lithography apparatus |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200818 |
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| RJ01 | Rejection of invention patent application after publication |