CN213772298U - Spinneret plate for preparing polylactic acid sheath-core structure tows - Google Patents
Spinneret plate for preparing polylactic acid sheath-core structure tows Download PDFInfo
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- CN213772298U CN213772298U CN202021966602.XU CN202021966602U CN213772298U CN 213772298 U CN213772298 U CN 213772298U CN 202021966602 U CN202021966602 U CN 202021966602U CN 213772298 U CN213772298 U CN 213772298U
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Abstract
The utility model provides a spinneret for preparing polylactic acid skin core structure silk bundle, a serial communication port, be equipped with the spinneret orifice on the spinneret, the spinneret orifice is including the cortex spinneret orifice that is used for the cortex silk bundle to pass through and the sandwich layer spinneret orifice that is used for the sandwich layer silk bundle to pass through, cortex spinneret orifice symmetry is arranged in the sandwich layer spinneret orifice outside for cortex spinneret orifice and sandwich layer spinneret orifice are combined together and are cross hole structure. The utility model discloses the cross skin core structure silk bundle heat resistance of polylactic acid of spinneret preparation is strong, and bonding strength is high.
Description
Technical Field
The utility model belongs to the technical field of cigarette filter tip material preparation, concretely relates to a spinneret for preparing polylactic acid skin core structure silk bundle.
Background
At present, polylactic acid fibers prepared by a conventional spinning method have the problems of tow shrinkage, collapse and deformation of formed filter rods and the like easily caused by low crystallization degree and high placement temperature. On the other hand, if the shrinkage is suppressed by simply increasing the crystallinity of the polylactic acid fiber, problems such as the failure to swell and bond the filament bundle occur.
Therefore, the composite spinning technology is an important direction for simultaneously solving the shrinkage and bonding problems of the polylactic acid fiber, the polylactic acid material with high crystallinity is used as a core layer to solve the heat shrinkage problem, and the polylactic acid material with low crystallinity is used as a skin layer structure to provide bonding. Based on this, it is necessary to provide a spinneret plate for preparing a polylactic acid sheath-core structure filament bundle.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a spinneret for preparing polylactic acid skin-core structure silk bundle solves among the prior art the not good problem of spinneret preparation polylactic acid silk bundle adhesion property and heat resistance.
In order to realize the purpose, the following technical scheme is adopted:
the utility model provides a spinneret for preparing polylactic acid skin-core structure silk bundle, its characterized in that, be equipped with the spinneret orifice on the spinneret, the spinneret orifice is including the cortex spinneret orifice that is used for the cortex silk bundle to pass through and the sandwich layer spinneret orifice that is used for the sandwich layer silk bundle to pass through, cortex spinneret orifice symmetry arranges outside the sandwich layer spinneret orifice for cortex spinneret orifice and sandwich layer spinneret orifice are combined together and are cross hole structure.
The utility model is used for preparing the spinneret of polylactic acid skin core structure silk bundle has cross hole structure, and cortex silk bundle, sandwich layer silk bundle are respectively through the cortex spinneret orifice and the sandwich layer spinneret orifice of this spinneret orifice to the preparation obtains the polylactic acid silk bundle that has cross skin core structure.
The utility model discloses a following improvement can be done, the spinneret orifice includes four cortex spinneret orifices and a sandwich layer spinneret orifice, and four cortex spinneret orifice symmetries are arranged in the sandwich layer spinneret orifice outside, and cortex spinneret orifice and sandwich layer spinneret orifice combination are cross hole structure together.
Furthermore, the cortex spinneret holes and the core spinneret holes are square holes, and each cortex spinneret hole is connected with four sides of each core spinneret hole.
Furthermore, the cortex spinneret orifice is a square hole, the core layer spinneret orifice is a cross-shaped hole, the core layer spinneret orifice is provided with four protruding parts, and each cortex spinneret orifice is respectively connected with the protruding parts of the core layer spinneret orifice.
The utility model discloses a following improvement can be done, the spinneret orifice includes a cortex spinneret orifice and a sandwich layer spinneret orifice, the sandwich layer spinneret orifice is cross type hole, and a cortex spinneret orifice symmetry is arranged in the sandwich layer spinneret orifice outside, and cortex spinneret orifice and sandwich layer spinneret orifice combination are cross type hole structure together.
The utility model discloses can further improve, the spinneret orifice becomes array distribution or multilayer ring distribution on the spinneret.
The utility model discloses in, the spinneret is circular, and the diameter is 100 supplyes 400 mm.
Furthermore, the number of the spinneret holes of the spinneret plate is 800-2000.
The utility model discloses in, the cortex spinneret orifice is connected with cortex material feed inlet, the sandwich layer spinneret orifice is connected with sandwich layer material feed inlet.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the utility model discloses can be used for among the composite spinning, the preparation has the silk bundle of cross skin core structure, solves polylactic acid fibre and contracts the first problem that is not enough with bonding strength.
(2) The utility model discloses the cross skin core structure silk bundle heat resistance of polylactic acid of spinneret preparation is strong, and bonding strength is high.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic view of the spinneret orifice structure of the spinneret plate according to embodiments 1 and 2 of the present invention;
fig. 2 is a schematic view of the spinneret orifice structure of the spinneret plate in embodiment 3 of the present invention;
fig. 3 is a schematic view of the spinneret orifice structure of the spinneret plate according to embodiment 4 of the present invention;
the reference numbers in the figures are as follows: 1-sheath spinneret holes; 2-core layer spinneret orifice.
Detailed Description
Example 1
A spinneret plate for preparing polylactic acid sheath-core structure tows is circular, the diameter of the spinneret plate is 100mm, cross-shaped spinneret holes shown in figure 1 are distributed on the spinneret plate in an array mode, and the number of the spinneret holes is 800. The spinneret orifice includes four cortex spinneret orifices 1 and a sandwich layer spinneret orifice 2, and cortex spinneret orifice 1 and sandwich layer spinneret orifice 2 all are square hole, and four 1 symmetries of cortex spinneret orifice are arranged in 2 outsides of sandwich layer spinneret orifice, and every cortex spinneret orifice 1 is connected with the four sides of sandwich layer spinneret orifice 2, and cortex spinneret orifice 1 and the combination of sandwich layer spinneret orifice 2 are the cross together. The cortex spinneret orifice 1 is connected with the cortex material feed inlet, and the core spinneret orifice 2 is connected with the core material feed inlet.
The method for preparing the polylactic acid sheath-core structure tows by using the spinneret plate comprises the following steps:
2kg of polylactic resin with the crystallization temperature of 150 ℃ is selected as core layer resin and is put into an oven with the temperature of 80 ℃ for drying for 6 hours, and 4kg of polylactic resin with the crystallization temperature of 140 ℃ is selected as skin layer resin and is put into an oven with the temperature of 60 ℃ for drying for 4 hours. The polylactic resin of the core layer is added into a core layer spinning system, the temperature of the double screws of the core layer is set to 205-. The cortical layer polylactic resin is added into a cortical layer spinneret system, the cortical layer double-screw temperature is set to 160-. And then performing water bath drafting and sizing, and forming the obtained tows and 0.2kg of glycerol triacetate by a filter stick forming machine to obtain the cigarette filter stick.
Example 2
The difference between this example and example 1 is that the diameter of the spinneret plate is 400mm, cross spinneret holes as shown in fig. 1 are distributed on the spinneret plate in a circular manner, and the number of the spinneret holes is 2000.
The spinneret plate is used for preparing the polylactic acid sheath-core structure tows in the same way as in the example 1.
Example 3
A spinneret plate for preparing polylactic acid sheath-core structure tows is circular, the diameter of the spinneret plate is 200mm, cross spinneret holes shown in figure 2 are distributed on the spinneret plate in a circular mode, and the number of the spinneret holes is 1200. The spinneret orifice includes four cortex spinneret orifices 1 and a sandwich layer spinneret orifice 2, and cortex spinneret orifice 1 is square hole, and sandwich layer spinneret orifice 2 is cross hole, and sandwich layer spinneret orifice 2 has four bulges, and four 1 symmetries of cortex spinneret orifice are arranged in 2 outsides of sandwich layer spinneret orifice, and every cortex spinneret orifice 1 is connected with the bulge of sandwich layer spinneret orifice 2 respectively, and cortex spinneret orifice 1 is the cross together with 2 combinations of sandwich layer spinneret orifice. The cortex spinneret orifice 1 is connected with the cortex material feed inlet, and the core spinneret orifice 2 is connected with the core material feed inlet.
The method for preparing the polylactic acid sheath-core structure tows by using the spinneret plate comprises the following steps:
4kg of polylactic resin with the crystallization temperature of 200 ℃ is selected as core layer resin and is put into a 100 ℃ oven for drying for 10h, and 2kg of polylactic resin with the crystallization temperature of 100 ℃ is selected as skin layer resin and is put into a 40 ℃ oven for drying for 2 h. The polylactic resin of the core layer is added into a core layer spinning system, the temperature of the double screws of the core layer is set to 205-. The cortical layer polylactic resin is added into a cortical layer spinneret system, the cortical layer double-screw temperature is set to be 160-170-190-200 ℃, the filtration temperature is 205 ℃, and the cortical layer polylactic resin is sprayed out through the cortical layer spinneret orifice 1. And then the mixture is drafted and shaped through water bath. And forming the obtained tows and 0.1kg of glycerol triacetate by a filter stick forming machine to obtain the filter stick.
Example 4
A spinneret plate for preparing polylactic acid sheath-core structure tows is circular, the diameter of the spinneret plate is 300mm, cross spinneret holes shown in figure 3 are distributed on the spinneret plate in a circular mode, and the number of the spinneret holes is 1600. The spinneret orifice comprises a cortex spinneret orifice 1 and a core layer spinneret orifice 2, the core layer spinneret orifice 2 is a cross-shaped orifice, the cortex spinneret orifice 1 is sleeved outside the core layer spinneret orifice 2, and the cortex spinneret orifice 1 and the core layer spinneret orifice 2 are combined together to form a cross shape. The cortex spinneret orifice 1 is connected with the cortex material feed inlet, and the core spinneret orifice 2 is connected with the core material feed inlet.
The method for preparing the polylactic acid sheath-core structure tows by using the spinneret plate comprises the following steps:
4kg of polylactic resin with the crystallization temperature of 200 ℃ is selected as core layer resin and is put into a 100 ℃ oven for drying for 10h, and 2kg of polylactic resin with the crystallization temperature of 100 ℃ is selected as skin layer resin and is put into a 40 ℃ oven for drying for 2 h. The polylactic resin of the core layer is added into a core layer spinning system, the temperature of the double screws of the core layer is set to 205-. The cortical layer polylactic resin is added into a cortical layer spinneret system, the cortical layer double-screw temperature is set to be 160-170-190-200 ℃, the filtration temperature is 205 ℃, and the cortical layer polylactic resin is sprayed out through the cortical layer spinneret orifice 1. And then the mixture is drafted and shaped through water bath. And forming the obtained tows and 0.1kg of glycerol triacetate by a filter stick forming machine to obtain the filter stick.
Performance testing
The heat resistance and the bonding strength of the sheath-core structure tows prepared in examples 1 to 4 were measured, and the specific results are shown in table 1.
TABLE 1 Heat resistance and adhesion Properties of Cross sheath-core structured tows of polylactic acid prepared using different spinnerets
The above embodiments of the present invention are not right the utility model discloses the limited protection scope, the utility model discloses an embodiment is not limited to this, all kinds of basis according to the above-mentioned of the utility model discloses an under the above-mentioned basic technical thought prerequisite of the utility model, right according to ordinary technical knowledge and the conventional means in this field the modification, replacement or the change of other multiple forms that above-mentioned structure made all should fall within the protection scope of the utility model.
Claims (9)
1. The utility model provides a spinneret for preparing polylactic acid skin-core structure silk bundle, a serial communication port, be equipped with the spinneret orifice on the spinneret, the spinneret orifice is including cortex spinneret orifice (1) that are used for the cortex silk bundle to pass through and sandwich layer spinneret orifice (2) that are used for the sandwich layer silk bundle to pass through, cortex spinneret orifice (1) symmetry is arranged in sandwich layer spinneret orifice (2) outside for cortex spinneret orifice (1) and sandwich layer spinneret orifice (2) combination are cross hole structure together.
2. The spinneret plate for preparing the polylactic acid sheath-core structure filament bundle according to claim 1, wherein the spinneret holes comprise four sheath spinneret holes (1) and one core spinneret hole (2), the four sheath spinneret holes (1) are symmetrically arranged outside the core spinneret hole (2), and the sheath spinneret holes (1) and the core spinneret hole (2) are combined together to form a cross-hole structure.
3. The spinneret plate for preparing the polylactic acid sheath-core structure filament bundle according to claim 2, wherein the sheath spinneret holes (1) and the core spinneret holes (2) are square holes, and each sheath spinneret hole (1) is connected with four sides of the core spinneret hole (2).
4. The spinneret plate for preparing the polylactic acid sheath-core structure filament bundle according to claim 2, wherein the sheath spinneret holes (1) are square holes, the core spinneret holes (2) are cross-shaped holes, the core spinneret holes (2) have four protrusions, and each sheath spinneret hole (1) is connected with the protrusion of the core spinneret hole (2).
5. The spinneret plate for preparing the polylactic acid sheath-core structure filament bundle according to claim 1, wherein the spinneret holes comprise a sheath spinneret hole (1) and a core spinneret hole (2), the core spinneret hole (2) is a cross-shaped hole, one sheath spinneret hole (1) is symmetrically arranged outside the core spinneret hole (2), and the sheath spinneret hole (1) and the core spinneret hole (2) are combined together to form a cross-shaped hole structure.
6. The spinneret plate for preparing the polylactic acid sheath-core structure filament bundle according to any one of claims 1-5, wherein the spinneret holes are distributed in an array or in a plurality of layers of circular rings on the spinneret plate.
7. The spinneret plate for preparing the polylactic acid sheath-core structure filament bundle according to claim 6, wherein the spinneret plate is circular and has a diameter of 100-400 mm.
8. The spinneret plate for preparing the polylactic acid sheath-core structure filament bundle according to claim 7, wherein the number of the spinneret holes of the spinneret plate is 800-2000.
9. The spinneret plate for preparing the polylactic acid sheath-core structure filament bundle according to claim 8, wherein the sheath layer spinneret hole (1) is connected with the sheath layer material feeding port, and the core layer spinneret hole (2) is connected with the core layer material feeding port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021966602.XU CN213772298U (en) | 2020-09-10 | 2020-09-10 | Spinneret plate for preparing polylactic acid sheath-core structure tows |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021966602.XU CN213772298U (en) | 2020-09-10 | 2020-09-10 | Spinneret plate for preparing polylactic acid sheath-core structure tows |
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| CN213772298U true CN213772298U (en) | 2021-07-23 |
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| CN202021966602.XU Active CN213772298U (en) | 2020-09-10 | 2020-09-10 | Spinneret plate for preparing polylactic acid sheath-core structure tows |
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