CN115897297A - High-damping paper cone and preparation method and application thereof - Google Patents
High-damping paper cone and preparation method and application thereof Download PDFInfo
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- CN115897297A CN115897297A CN202211442837.2A CN202211442837A CN115897297A CN 115897297 A CN115897297 A CN 115897297A CN 202211442837 A CN202211442837 A CN 202211442837A CN 115897297 A CN115897297 A CN 115897297A
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- 240000000907 Musa textilis Species 0.000 claims abstract description 40
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 38
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims abstract description 37
- 238000004537 pulping Methods 0.000 claims description 91
- 238000007731 hot pressing Methods 0.000 claims description 45
- 238000000034 method Methods 0.000 claims description 33
- 239000002002 slurry Substances 0.000 claims description 26
- 238000010009 beating Methods 0.000 claims description 21
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Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
Abstract
The invention discloses a high-damping paper cone and a preparation method and application thereof. The high-damping paper cone comprises the following components in parts by weight: 30-50 parts of bleached sulfate wood pulp, 10-30 parts of manila hemp pulp, 10-30 parts of bark and 10-30 parts of tencel fiber. The paper cone manufactured by the invention has high strength and proper damping.
Description
Technical Field
The invention relates to the technical field of loudspeakers, in particular to a cone paper and a preparation method and application thereof, and particularly relates to a high-damping cone paper and a preparation method and application thereof.
Background
The cone is still the largest material in the diaphragm material in the loudspeaker industry. However, the specialty fibers currently used to improve cone damping are few and have their own drawbacks. The performance of the loudspeaker is greatly improved by finding the pulp which does not reduce the physical performance of the cone and can improve the damping of the cone.
The specific modulus is high, and proper damping is an ideal performance requirement of the loudspeaker, but the high modulus and the damping are two inversely related performance indexes, and how to reach the high modulus and the proper damping is always a research hotspot of the loudspeaker industry. The damping of the cone is generated by heat generated by friction between fibers, which requires weak bonding force between the fibers to generate internal friction, and the weak bonding force may cause strength reduction of the cone and affect the performance of the speaker.
At present, the manufacturing process of the paper cone mainly uses plant fibers as main materials, and simultaneously, part of chemical fibers including carbon fibers, aramid fibers, glass fibers and the like can be doped. The main form of the plant fiber is a slender rod-shaped fiber, the good devillicate brooming effect is not achieved, meanwhile, hydrogen bond combination is easy to generate among the plant fibers, the strength is improved, and the damping effect does not achieve the ideal effect.
At present, a mode of adding wool pulp to improve damping effect is adopted, and CN111996829B discloses a cone for a loudspeaker containing bulletproof fiber pulp and a preparation method thereof, wherein the cone comprises 40-70 parts of unbleached sulfate wood pulp, 20-50 parts of linseed pulp, 5-10 parts of degreased wool, 4-12 parts of bulletproof fiber pulp and 0.5-2 parts of cationic starch. All components in the slurry are matched with each other, the synergy is realized, and the cone has proper internal damping on the basis of improving the Young modulus of the cone. CN111510845A discloses a cone for a loudspeaker and a preparation method and application thereof, and the materials of the cone comprise 20 to 50 parts of unbleached sulfate wood pulp, 30 to 40 parts of hemp pulp, 10 to 20 parts of bark pulp, 5 to 20 parts of wool pulp and 0.01 to 0.03 part of pulping enzyme. The damping performance of the loudspeaker is improved by adding wool pulp.
In the prior art, the wool pulp can improve the damping of the cone, but the wool fiber serving as a protein fiber is extremely easy to damage, so that the service life of the cone is shortened.
And the damping effect of the paper cone is improved by coating damping glue. CN206611575U discloses a loudspeaker, wherein a cone of the loudspeaker is coated with damping glue to suppress resonance, reduce distortion and improve the middle frequency valley. The damping effect of the cone can be improved by coating the damping glue, but the mass of the cone is increased, and the sound pressure level of the loudspeaker is reduced.
Still others have used the basin of polymer material to replace the cone of paper to improve the damping effect. CN114940824A discloses a vibrating diaphragm of a generator, a preparation method thereof and a generator, wherein the damping performance of a speaker is improved by using the vibrating diaphragm made of silica gel material. But the loudspeaker of the polymer cone is difficult to restore the real original sound.
As a rayon fiber, the tencel fiber has very high fiber crystal orientation which is arranged along the fiber axial direction and reaches more than 90 percent, has very high devillicate brooming characteristic due to the crystal orientation, and is expected to be applied to the speaker industry. However, the tencel fiber is very easy to cut off in the beating process as an artificial cellulose fiber, so that the length of the tencel fiber is greatly reduced to form fine fibers, and the tencel fiber is easy to run off along with the papermaking process. In fibrillation and papermaking characteristics of two cellulose fibers, it was pointed out by Tian et al that in the beating process, when a PFI mill was used to beat tencel fibers, the length of the tencel fibers was drastically reduced; when the rotational speed of the PFI mill was increased from 0 to 2000r, the tencel fiber length had decreased from 6mm to 0.99mm; increasing to 10000r, the tencel fiber length had decreased to 0.36mm. Similar results were also found in chen qie et al, application of tencel fibers in transformer insulation board. How to ensure the devillicate brooming of the tencel fiber, and meanwhile, the length of the fiber can not be correspondingly reduced, which is also a difficulty in the application of the tencel fiber.
Therefore, a cone which can improve the strength of the loudspeaker and has proper damping can greatly improve the performance and competitiveness of the loudspeaker is searched.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a high-damping cone and a preparation method and application thereof, and the prepared cone has high strength and proper damping.
One of the purposes of the invention is to provide a high damping paper cone, and in order to achieve the purpose, the invention adopts the following technical scheme:
a high damping paper cone comprises the following components in parts by weight:
it should be noted that the high damping, i.e. loss factor, referred to in the present invention refers to the loss factor of the corresponding cone. The types and the addition amounts of the pulps are different, and the loss factors are also different. The high damping means that the loss factor of the cone is above 0.05 after the tencel fiber is added.
In the high-damping cone, the tencel fibers are added and matched with the plant fibers, so that the manufactured cone has high strength and high damping effect, and the comprehensive performance of the loudspeaker is improved when the high-damping cone is used for manufacturing the loudspeaker.
Specifically, the high-damping paper cone comprises the following components in parts by weight:
the bleached kraft pulp is in a weight part range of 30-50 parts, for example 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49 or 50 parts, etc.
The manila hemp pulp is 10-30 parts by weight, such as 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, 26 parts, 27 parts, 28 parts, 29 parts or 30 parts and the like.
The bark is 10-30 parts, such as 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29 or 30 parts by weight.
The weight portion of the tencel fiber is 10-30 portions, such as 10 portions, 11 portions, 12 portions, 13 portions, 14 portions, 15 portions, 16 portions, 17 portions, 18 portions, 19 portions, 20 portions, 21 portions, 22 portions, 23 portions, 24 portions, 25 portions, 26 portions, 27 portions, 28 portions, 29 portions or 30 portions, etc.
In the present invention, the tencel fiber has a length of 2 to 4mm, for example, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, etc.; if the length of the tencel fiber is too long, the length of the beaten tencel fiber is longer, and the devillicate brooming effect is lower; if the length of the tencel fiber is too short, the tencel fiber is short after pulping, and meanwhile, the content of fine fibers is high.
The second purpose of the invention is to provide a preparation method of the high damping cone, which comprises the following steps:
(1) Pulping bleached sulfate wood pulp, manila hemp pulp and bark pulp respectively according to a ratio, and mixing to obtain a component A;
(2) Pulping tencel fibers to obtain tencel fiber pulp;
(3) Adding water into the component A obtained in the step (1) and the tencel fiber slurry obtained in the step (2) according to a ratio, diluting and stirring the mixture to uniformly disperse the mixture, and filtering the mixture on a cone forming die to obtain a cone blank;
(4) Carrying out hot pressing on the cone blank obtained in the step (3) to obtain a cone blank;
(5) And (4) punching the cone blank obtained in the step (4) to obtain the high-damping cone.
The high-damping paper basin manufacturing method can be used for devillicating the tencel fiber, meanwhile, the length of the tencel fiber cannot be correspondingly reduced, and the manufactured paper basin has high strength and high damping effect.
In the present invention, in the step (2), the beaten pulp is concentrated to 0.5 to 1%, for example, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1% or the like. If the pulp concentration is too low, the pulping efficiency is too low; if the pulp concentration is too high, the fibers are wound, the beating effect is poor, and the fiber devillicating and brooming effect is poor.
In the step (2), the weight of the beating is 0.5-2kg, for example, 0.5kg, 0.6kg, 0.7kg, 0.8kg, 0.9kg, 1kg, 1.1kg, 1.2kg, 1.3kg, 1.4kg, 1.5kg, 1.6kg, 1.7kg, 1.8kg, 1.9kg or 2kg.
In the step (2), the beating pitch of beating is 0.1-0.5mm, such as 0.1mm, 0.2mm, 0.3mm, 0.4mm or 0.5mm. If the spacing is too high, the beating effect is poor.
In the step (2), the beating time of the beating is 30-180min, such as 30min, 40min, 50min, 60min, 70min, 80min, 90min, 100min, 110min, 120min, 130min, 140min, 150min, 160min, 170min, 180min and the like. If the pulping time is too long, the fibers are cut off and the length is short; if the beating time is too short, the fibers are not broomed.
In the step (4), the hot pressing temperature of the hot pressing is 150-200 ℃, for example, 150 ℃, 160 ℃, 170 ℃, 180 ℃, 190 ℃, 200 ℃ and the like; the hot pressing time is 20-40s, such as 20s, 25s, 30s, 35s or 40s.
As a preferable scheme of the invention, the preparation method of the high damping cone comprises the following steps:
(1) Pulping bleached sulfate wood pulp, manila hemp pulp and bark pulp according to the proportion respectively and then mixing to obtain a component A;
(2) Pulping tencel fiber to obtain tencel fiber pulp, wherein the concentration of the pulped pulp is 0.5-1%, the hanging weight is 0.5-2kg, the pulping interval is 0.1-0.5mm, and the pulping time is 30-180min;
(3) Diluting the component A obtained in the step (1) and the tencel fiber slurry obtained in the step (2) by adding water according to a ratio, stirring to uniformly disperse the component A and the tencel fiber slurry, and filtering on a cone forming die to obtain a cone blank;
(4) Carrying out hot pressing on the cone blank obtained in the step (3), wherein the hot pressing temperature is 150-200 ℃, and the hot pressing time is 20-40s, so as to obtain the cone blank;
(5) And (5) punching the cone blank obtained in the step (4) to obtain the high-damping cone.
The invention also aims to provide application of the high-damping cone, which is used for preparing a loudspeaker.
Compared with the prior art, the invention has the beneficial effects that:
the high-damping paper cone has high strength and proper damping. Specifically, the tencel fiber prepared by the method has the length of 0.73-1.38mm, the devillicate fibrillation length ratio of the fiber of 20.34-34.27 percent and the length ratio of the fine fiber of 32-53 percent; the tencel fiber-containing paperboard prepared by the method has the tensile strength of 11.33-17.03KN/m, the modulus of 3.54-5.14GPa and the loss factor of 0.058-0.091.
Detailed Description
The technical solution of the present invention is further described below by way of specific embodiments.
Unless otherwise specified, various starting materials of the present invention are commercially available or prepared according to conventional methods in the art.
The raw material sources of the components in the following examples are as follows: bleached kraft pulp (BKP, available from Yongqi electro-acoustic technology development, inc., guangzhou), abaca pulp (available from Yongqi electro-acoustic technology development, inc., guangzhou), bark pulp (available from Yongqi electro-acoustic technology development, inc., guangzhou), tencel fiber (brand: australian, 1.78dtex 2mm, available from Yongzhou Yokogao textile, inc.).
Example 1
The embodiment provides a cone for a loudspeaker containing tencel fibers, which is prepared from the following raw materials in parts by weight: 50 parts of bleached sulfate wood pulp, 10 parts of manila hemp pulp, 10 parts of bark pulp and 30 parts of tencel fiber.
The cone for a speaker of the present embodiment is prepared by the following method:
(1) Respectively pulping 3 kinds of bleached sulfate wood pulp, manila hemp pulp and bark pulp, and mixing according to fractions to obtain a component A;
(2) Pulping 2mm tencel fiber according to pulp concentration of 0.5%, hanging weight of 1kg, pulping interval of 0.2mm and pulping time of 90min, and collecting pulp after pulping.
(3) Diluting the component A obtained in the step (1) and the tencel fiber slurry obtained in the step (2) by adding water according to parts, stirring to uniformly disperse the components, and filtering on a cone forming die to obtain a cone blank;
(4) Carrying out hot pressing on the cone blank obtained in the step (3), wherein the hot pressing temperature is 180 ℃, and the hot pressing time is 30s, so as to obtain the cone blank;
(5) And (5) punching the cone blank obtained in the step (4) to obtain the cone for the loudspeaker containing the tencel fibers.
Example 2
The embodiment provides a cone for a loudspeaker containing tencel fibers, which is prepared from the following raw materials in parts by weight: 40 parts of bleached sulfate wood pulp, 15 parts of manila hemp pulp, 10 parts of bark pulp and 23 parts of tencel fiber.
The cone for a speaker of the present embodiment is prepared by the following method:
(1) Respectively pulping 3 kinds of bleached sulfate wood pulp, manila hemp pulp and bark pulp, and mixing according to fractions to obtain a component A;
(2) Pulping 2mm tencel fiber according to pulp concentration of 0.65%, hanging weight of 1kg, pulping interval of 0.1mm and pulping time of 90min, and collecting pulp after pulping.
(3) Diluting the component A obtained in the step (1) and the tencel fiber slurry obtained in the step (2) by adding water according to parts, stirring to uniformly disperse the component A and the tencel fiber slurry, and filtering on a cone forming die to obtain a cone blank;
(4) Carrying out hot pressing on the cone blank obtained in the step (3), wherein the hot pressing temperature is 180 ℃, and the hot pressing time is 30s, so as to obtain the cone blank;
(5) And (5) punching the cone blank obtained in the step (4) to obtain the cone containing the tencel fibers for the loudspeaker.
Example 3
The embodiment provides a cone for a loudspeaker containing tencel fibers, which is prepared from the following raw materials in parts by weight: 30 parts of bleached sulfate wood pulp, 20 parts of manila hemp pulp, 20 parts of bark pulp and 30 parts of tencel fiber.
The cone for a speaker of the present embodiment is prepared by the following method:
(1) Respectively pulping 3 kinds of bleached sulfate wood pulp, manila hemp pulp and bark pulp, and mixing according to fractions to obtain a component A;
(2) Pulping 4mm tencel fiber according to pulp concentration of 0.8%, hanging weight of 1kg, pulping interval of 0 and pulping time of 90min, and collecting pulp after pulping.
(3) Diluting the component A obtained in the step (1) and the tencel fiber slurry obtained in the step (2) by adding water according to parts, stirring to uniformly disperse the components, and filtering on a cone forming die to obtain a cone blank;
(4) Carrying out hot pressing on the cone blank obtained in the step (3), wherein the hot pressing temperature is 180 ℃, and the hot pressing time is 30s, so as to obtain the cone blank;
(5) And (5) punching the cone blank obtained in the step (4) to obtain the cone containing the tencel fibers for the loudspeaker.
Example 4
The embodiment provides a cone for a loudspeaker containing tencel fibers, which is prepared from the following raw materials in parts by weight: 30 parts of bleached sulfate wood pulp, 30 parts of manila hemp pulp, 30 parts of bark pulp and 10 parts of tencel fiber.
The cone for a speaker of the present embodiment is prepared by the following method:
(1) Respectively pulping 3 kinds of bleached sulfate wood pulp, manila hemp pulp and bark pulp, and mixing according to fractions to obtain a component A;
(2) Pulping 4mm tencel fiber according to pulp concentration of 1%, hanging weight of 1kg, pulping interval of 0.3mm and pulping time of 90min, and collecting pulp after pulping.
(3) Diluting the component A obtained in the step (1) and the tencel fiber slurry obtained in the step (2) by adding water according to parts, stirring to uniformly disperse the component A and the tencel fiber slurry, and filtering on a cone forming die to obtain a cone blank;
(4) Hot-pressing the cone blank obtained in the step (3) at 180 ℃ for 30s to obtain a cone blank;
(5) And (5) punching the cone blank obtained in the step (4) to obtain the cone containing the tencel fibers for the loudspeaker.
Example 5
The embodiment provides a cone for a loudspeaker containing tencel fibers, which is prepared from the following raw materials in parts by weight: 45 parts of bleached sulfate wood pulp, 20 parts of manila hemp pulp, 18 parts of bark pulp and 17 parts of tencel fiber.
The cone for a speaker of the present embodiment is prepared by the following method:
(1) Respectively pulping 3 kinds of bleached sulfate wood pulp, manila hemp pulp and bark pulp, and mixing according to fractions to obtain a component A;
(2) Pulping 2mm tencel fiber according to pulp concentration of 0.65%, hanging weight of 1kg, pulping interval of 0.2mm and pulping time of 180min, and collecting pulp after pulping.
(3) Diluting the component A obtained in the step (1) and the tencel fiber slurry obtained in the step (2) by adding water according to parts, stirring to uniformly disperse the components, and filtering on a cone forming die to obtain a cone blank;
(4) Carrying out hot pressing on the cone blank obtained in the step (3), wherein the hot pressing temperature is 180 ℃, and the hot pressing time is 30s, so as to obtain the cone blank;
(5) And (5) punching the cone blank obtained in the step (4) to obtain the cone for the loudspeaker containing the tencel fibers.
Example 6
The embodiment provides a cone for a loudspeaker containing tencel fibers, which is prepared from the following raw materials in parts by weight: 50 parts of bleached sulfate wood pulp, 20 parts of manila hemp pulp, 20 parts of bark pulp and 10 parts of tencel fiber.
The cone for a speaker of the present embodiment is prepared by the following method:
(1) Respectively pulping 3 kinds of bleached sulfate wood pulp, manila hemp pulp and bark pulp, and mixing according to fractions to obtain a component A;
(2) Pulping 2mm tencel fiber according to pulp concentration of 0.7%, hanging weight of 1kg, pulping interval of 0.4mm and pulping time of 140min, and collecting pulp after pulping.
(3) Diluting the component A obtained in the step (1) and the tencel fiber slurry obtained in the step (2) by adding water according to parts, stirring to uniformly disperse the components, and filtering on a cone forming die to obtain a cone blank;
(4) Hot-pressing the cone blank obtained in the step (3) at 180 ℃ for 30s to obtain a cone blank;
(5) And (5) punching the cone blank obtained in the step (4) to obtain the cone for the loudspeaker containing the tencel fibers.
Example 7
The embodiment provides a cone for a loudspeaker containing tencel fibers, which is prepared from the following raw materials in parts by weight: 40 parts of bleached sulfate wood pulp, 30 parts of manila hemp pulp, 15 parts of bark pulp and 15 parts of tencel fiber.
The cone for a speaker of the present embodiment is prepared by the following method:
(1) Respectively pulping 3 kinds of bleached sulfate wood pulp, manila hemp pulp and bark pulp, and mixing according to fractions to obtain a component A;
(2) Pulping 4mm tencel fiber according to pulp concentration of 0.7%, hanging weight of 1kg, pulping interval of 0.3mm and pulping time of 140min, and collecting pulp after pulping.
(3) Diluting the component A obtained in the step (1) and the tencel fiber slurry obtained in the step (2) by adding water according to parts, stirring to uniformly disperse the components, and filtering on a cone forming die to obtain a cone blank;
(4) Hot-pressing the cone blank obtained in the step (3) at 180 ℃ for 30s to obtain a cone blank;
(5) And (5) punching the cone blank obtained in the step (4) to obtain the cone for the loudspeaker containing the tencel fibers.
Example 8
The embodiment provides a cone for a loudspeaker containing tencel fibers, which is prepared from the following raw materials in parts by weight: 50 parts of bleached sulfate wood pulp, 30 parts of manila hemp pulp, 10 parts of bark pulp and 10 parts of tencel fiber.
The cone for a speaker of the present embodiment is prepared by the following method:
(1) Respectively pulping 3 kinds of bleached sulfate wood pulp, manila hemp pulp and bark pulp, and mixing according to fractions to obtain a component A;
(2) Pulping 2mm tencel fiber according to pulp concentration of 0.65%, hanging weight of 1kg, pulping interval of 0mm and pulping time of 30min, and collecting pulp after pulping.
(3) Diluting the component A obtained in the step (1) and the tencel fiber slurry obtained in the step (2) by adding water according to parts, stirring to uniformly disperse the components, and filtering on a cone forming die to obtain a cone blank;
(4) Carrying out hot pressing on the cone blank obtained in the step (3), wherein the hot pressing temperature is 180 ℃, and the hot pressing time is 30s, so as to obtain the cone blank;
(5) And (5) punching the cone blank obtained in the step (4) to obtain the cone for the loudspeaker containing the tencel fibers.
Example 9
The embodiment provides a cone for a loudspeaker containing tencel fibers, which is prepared from the following raw materials in parts by weight: 35 parts of bleached sulfate wood pulp, 25 parts of manila hemp pulp, 25 parts of bark pulp and 15 parts of tencel fiber.
The cone for a speaker of the present embodiment is prepared by the following method:
(1) Respectively pulping 3 kinds of bleached sulfate wood pulp, manila hemp pulp and bark pulp, and mixing according to fractions to obtain a component A;
(2) Pulping 4mm tencel fiber according to pulp concentration of 0.7%, hanging weight of 1kg, pulping interval of 0.2mm and pulping time of 140min, and collecting pulp after pulping.
(3) Diluting the component A obtained in the step (1) and the tencel fiber slurry obtained in the step (2) by adding water according to parts, stirring to uniformly disperse the components, and filtering on a cone forming die to obtain a cone blank;
(4) Hot-pressing the cone blank obtained in the step (3) at 180 ℃ for 30s to obtain a cone blank;
(5) And (5) punching the cone blank obtained in the step (4) to obtain the cone for the loudspeaker containing the tencel fibers.
Example 10
The embodiment provides a cone for a loudspeaker containing tencel fibers, which is prepared from the following raw materials in parts by weight: 40 parts of bleached sulfate wood pulp, 15 parts of manila hemp pulp, 10 parts of bark pulp and 23 parts of tencel fiber.
The cone for a speaker of the present embodiment is prepared by the following method:
(1) Respectively pulping 3 kinds of bleached sulfate wood pulp, manila hemp pulp and bark pulp, and mixing according to fractions to obtain a component A;
(2) Pulping the tencel fiber with the thickness of 6mm according to the pulp concentration of 0.65 percent, the hanging weight of 1kg, the pulping interval of 0.1mm and the pulping time of 90min, and collecting the pulp after pulping.
(3) Diluting the component A obtained in the step (1) and the tencel fiber slurry obtained in the step (2) by adding water according to parts, stirring to uniformly disperse the component A and the tencel fiber slurry, and filtering on a cone forming die to obtain a cone blank;
(4) Hot-pressing the cone blank obtained in the step (3) at 180 ℃ for 30s to obtain a cone blank;
(5) And (5) punching the cone blank obtained in the step (4) to obtain the cone containing the tencel fibers for the loudspeaker.
Example 11
The embodiment provides a cone for a loudspeaker containing tencel fibers, which is prepared from the following raw materials in parts by weight: 40 parts of bleached sulfate wood pulp, 15 parts of manila hemp pulp, 10 parts of bark pulp and 23 parts of tencel fiber.
The cone for a speaker of the present embodiment is prepared by the following method:
(1) Respectively pulping 3 kinds of bleached sulfate wood pulp, manila hemp pulp and bark pulp, and mixing according to fractions to obtain a component A;
(2) Pulping 1mm tencel fiber according to pulp concentration of 0.65%, hanging weight of 1kg, pulping interval of 0.1mm and pulping time of 90min, and collecting pulp after pulping.
(3) Diluting the component A obtained in the step (1) and the tencel fiber slurry obtained in the step (2) by adding water according to parts, stirring to uniformly disperse the components, and filtering on a cone forming die to obtain a cone blank;
(4) Carrying out hot pressing on the cone blank obtained in the step (3), wherein the hot pressing temperature is 180 ℃, and the hot pressing time is 30s, so as to obtain the cone blank;
(5) And (5) punching the cone blank obtained in the step (4) to obtain the cone for the loudspeaker containing the tencel fibers.
Example 12
The embodiment provides a cone for a loudspeaker containing tencel fibers, which is prepared from the following raw materials in parts by weight: 40 parts of bleached sulfate wood pulp, 15 parts of manila hemp pulp, 10 parts of bark pulp and 23 parts of tencel fiber.
The cone for a speaker of the present embodiment is prepared by the following method:
(1) Respectively pulping 3 kinds of bleached sulfate wood pulp, manila hemp pulp and bark pulp, and mixing according to fractions to obtain a component A;
(2) Pulping 2mm tencel fiber according to pulp concentration of 0.65%, hanging weight of 5kg, pulping interval of 0.1mm and pulping time of 90min, and collecting pulp after pulping.
(3) Diluting the component A obtained in the step (1) and the tencel fiber slurry obtained in the step (2) by adding water according to parts, stirring to uniformly disperse the components, and filtering on a cone forming die to obtain a cone blank;
(4) Carrying out hot pressing on the cone blank obtained in the step (3), wherein the hot pressing temperature is 180 ℃, and the hot pressing time is 30s, so as to obtain the cone blank;
(5) And (5) punching the cone blank obtained in the step (4) to obtain the cone for the loudspeaker containing the tencel fibers. Example 13 this example provides a cone for a speaker containing tencel fibers, which is prepared from the following raw materials in parts by weight: 40 parts of bleached sulfate wood pulp, 15 parts of manila hemp pulp, 10 parts of bark pulp and 23 parts of tencel fiber.
The cone for a speaker of the present embodiment is prepared by the following method:
(1) Respectively pulping 3 kinds of bleached sulfate wood pulp, manila hemp pulp and bark pulp, and mixing according to fractions to obtain a component A;
(2) Pulping 2mm tencel fiber according to pulp concentration of 1.65%, hanging weight of 1kg, pulping interval of 0.1mm and pulping time of 90min, and collecting pulp after pulping.
(3) Diluting the component A obtained in the step (1) and the tencel fiber slurry obtained in the step (2) by adding water according to parts, stirring to uniformly disperse the component A and the tencel fiber slurry, and filtering on a cone forming die to obtain a cone blank;
(4) Carrying out hot pressing on the cone blank obtained in the step (3), wherein the hot pressing temperature is 180 ℃, and the hot pressing time is 30s, so as to obtain the cone blank;
(5) And (5) punching the cone blank obtained in the step (4) to obtain the cone containing the tencel fibers for the loudspeaker.
Example 14
The embodiment provides a cone for a loudspeaker containing tencel fibers, which is prepared from the following raw materials in parts by weight: 40 parts of bleached sulfate wood pulp, 15 parts of manila hemp pulp, 10 parts of bark pulp and 23 parts of tencel fiber.
The cone for a speaker of the present embodiment is prepared by the following method:
(1) Respectively pulping 3 kinds of bleached sulfate wood pulp, manila hemp pulp and bark pulp, and mixing according to fractions to obtain a component A;
(2) Pulping 2mm tencel fiber according to pulp concentration of 0.65%, hanging weight of 1kg, pulping interval of 0.1mm and pulping time of 360min, and collecting pulp after pulping.
(3) Diluting the component A obtained in the step (1) and the tencel fiber slurry obtained in the step (2) by adding water according to parts, stirring to uniformly disperse the components, and filtering on a cone forming die to obtain a cone blank;
(4) Carrying out hot pressing on the cone blank obtained in the step (3), wherein the hot pressing temperature is 180 ℃, and the hot pressing time is 30s, so as to obtain the cone blank;
(5) And (5) punching the cone blank obtained in the step (4) to obtain the cone for the loudspeaker containing the tencel fibers. Example 15
The embodiment provides a cone for a loudspeaker containing tencel fibers, which is prepared from the following raw materials in parts by weight: 40 parts of bleached sulfate wood pulp, 15 parts of manila hemp pulp, 10 parts of bark pulp and 23 parts of tencel fiber.
The cone for a speaker of the present embodiment is prepared by the following method:
(1) Respectively pulping 3 kinds of bleached sulfate wood pulp, manila hemp pulp and bark pulp, and mixing according to fractions to obtain a component A;
(2) Pulping 2mm tencel fiber according to pulp concentration of 0.65%, hanging weight of 1kg, pulping interval of 0.8mm and pulping time of 90min, and collecting pulp after pulping.
(3) Diluting the component A obtained in the step (1) and the tencel fiber slurry obtained in the step (2) by adding water according to parts, stirring to uniformly disperse the component A and the tencel fiber slurry, and filtering on a cone forming die to obtain a cone blank;
(4) Hot-pressing the cone blank obtained in the step (3) at 180 ℃ for 30s to obtain a cone blank;
(5) And (5) punching the cone blank obtained in the step (4) to obtain the cone for the loudspeaker containing the tencel fibers.
Comparative example 1
This comparative example provides a cone for a speaker, which is different from example 2 in that no lyocell fiber is added, and the reduced lyocell fiber is added to the other components on average to ensure that the total amount is not changed, and the manufacturing method is the same as example 2.
Comparative example 2
This comparative example provides a cone for speakers, which is different from example 2 in that the amount of lyocell fiber is reduced to 5 parts, and the reduced lyocell fiber is added to the other components on average to ensure that the total amount is not changed, and the manufacturing method is the same as example 2.
Comparative example 3
This comparative example provides a cone for speakers, which is different from example 2 in that the amount of lyocell fibers used is increased to 50 parts, the increased lyocell fibers are subtracted from the other components on average to ensure that the total amount is not changed, and the manufacturing method is the same as example 2.
Comparative example 4
This comparative example provides a cone for a loudspeaker, which differs from example 2 in that the amount of bleached kraft pulp is increased to 80 parts, the added bleached kraft pulp is subtracted from the other components on average to ensure that the total amount is unchanged, and the manufacturing method is the same as example 2.
Comparative example 5
This comparative example provides a cone for speakers, which is different from example 2 in that the amount of manila hemp pulp used is increased to 50 parts, the added manila hemp pulp is subtracted from other components on average to ensure that the total amount is not changed, and the preparation method is the same as example 2.
Comparative example 6
This comparative example provides a cone for a speaker, which is different from example 2 in that the amount of bark pulp is increased to 50 parts, the increased bark pulp is subtracted from other components on average to ensure that the total amount is constant, and the preparation method is the same as example 2.
Comparative example 7
This comparative example provides a cone for a speaker, which is different from example 2 in that wool pulp is used instead of tencel fiber, and the contents of other components and the preparation method are the same as those of example 2.
Comparative example 8
This comparative example provides a cone for a speaker, which is different from example 2 in that a combination of bulletproof fiber pulp and wool pulp is used instead of tencel fiber, and the contents of other components and the preparation method are the same as those of example 2.
Performance testing
The tencel fibers of examples 1 to 15 were measured by a fiber quality analyzer, and the results are shown in table 1. The respective performances of the cones for speakers containing tencel fibers prepared in examples 1 to 15 and the cones prepared in comparative examples 1 to 8 were measured, and the results are shown in table 2.
Wherein, the strength of the cone is characterized by tensile strength and Young modulus, and the damping is characterized by loss factor. Wherein, the test of the tensile strength refers to national standard GB/T12914-2018 constant speed tensile method (20 mm/min) for testing the tensile strength of paper and paperboard, and the test is carried out on a tensile strength instrument (L & W CE062, sweden); young's modulus and loss factor were tested using the Material parameter test Module (MPM) in KLIPPEL R & D SYSTEM.
TABLE 1
| Item | Average fiber length/mm | Devillicate brooming rate/% | Fine fiber length ratio/%) |
| Example 1 | 0.74 | 27.48 | 38 |
| Example 2 | 0.93 | 24.53 | 40 |
| Example 3 | 1.04 | 28.37 | 53 |
| Example 4 | 1.38 | 27.15 | 37 |
| Example 5 | 0.73 | 28.47 | 43 |
| Example 6 | 0.97 | 20.34 | 32 |
| Example 7 | 1.38 | 34.27 | 47 |
| Example 8 | 0.81 | 33.84 | 40 |
| Example 9 | 1.24 | 23.17 | 35 |
| Example 10 | 3.27 | 10.47 | 18 |
| Example 11 | 0.43 | 35.27 | 75 |
| Example 12 | 0.34 | 13.27 | 73 |
| Example 13 | 1.21 | 5.62 | 13 |
| Example 14 | 0.42 | 37.45 | 68 |
| Example 15 | 1.34 | 6.37 | 15 |
TABLE 2
As can be seen from the test data in Table 1, the tencel fiber prepared by the method of the present invention has a length of 0.73-1.38mm, a fibrillation length ratio of 20.34-34.27%, and a fines length ratio of 32-53%, indicating that the tencel fiber produces a higher fibrillation effect using the beating method of the present invention.
As can be seen from the test data in Table 2, the tencel fiber-containing paperboard prepared by the method of the present invention has a tensile strength of 11.33-17.03KN/m, a modulus of 3.54-5.14GPa, and a loss factor of 0.058-0.091, which indicates that in the present invention, the addition of the tencel fiber can increase the loss factor of the cone, i.e., increase the damping, and at the same time, the performance of the paper is slightly reduced due to the addition of the tencel fiber.
As can be seen from the comparison of the results of example 2 and example 10, when the lyocell fibers of 6mm were used for beating, the lyocell fibers failed to have a high fibrillation effect, and the damping of the cone was reduced.
As is clear from comparison between the results of example 2 and example 11, when 1mm lyocell fibers were used for beating, the lyocell fibers were greatly reduced in length and the ratio of the fine fiber to the fine fiber was large, which resulted in a decrease in the content of lyocell fibers during the papermaking process and a decrease in the damping of the bowl.
Comparing the results of example 2 and example 12, it is found that beating lyocell fibers with too high a weight results in greater cutting of lyocell fibers, and that the fibrillation effect is poor, reducing the damping of the cone.
Comparing the results of example 2 and example 13, it can be seen that when the lyocell fibers are beaten with an excessively high pulp consistency, the fibrillation effect of the lyocell fibers is poor, and the damping of the cone is reduced.
As is clear from the comparison between the results of example 2 and example 14, the beating time is too long, and the devillicate lyocell fibers are cut, thereby reducing the damping of the cone.
As is clear from comparison between the results of example 2 and example 15, the beating interval is too large, the lyocell fibers do not obtain a sufficient brooming effect, and the damping of the cone is reduced.
From the comparison of the results of example 2 and comparative example 1, it is understood that the tencel fiber addition amount is too small, and the physical properties of the cone can be increased, but the damping of the cone is reduced.
When the results of example 2 and comparative example 2 were compared, it was found that the damping performance was lowered when the addition amount of the lyocell fiber was too low.
Comparing the results of example 2 and comparative example 3, it is found that the strength of the cone strength is decreased when the lyocell fiber is added in an excessive amount.
Comparing the results of example 2 with those of comparative example 4, it is shown that the bleached kraft wood pulp fibers added in an excessive amount can increase the performance of the cone, but at the same time, the damping of the cone is also reduced.
Comparing the results of example 2 and comparative example 5, it is found that the performance of the cone can be increased by adding an excessive amount of manila hemp pulp, but the damping of the cone is also decreased.
Comparing the results of example 2 and comparative example 6, it is seen that the addition of bark pulp in an excessive amount increases the cone performance, but also decreases the cone damping.
In comparative example 7, the tencel fiber was replaced with wool pulp, and it was confirmed in comparison with the result of example 2 that the tencel fiber, as a highly devillicate brookfield cellulose fiber, could produce better binding force with the paper tub.
In comparative example 8, in which the lyocell fiber was replaced with a combination of bulletproof fiber pulp and wool pulp, it was found that lyocell fiber, as a highly devillicate fibrillated cellulose fiber, can produce better binding force with a cone, as compared with the result of example 2.
The present invention is illustrated by the above-mentioned examples, but the present invention is not limited to the above-mentioned detailed process equipment and process flow, i.e. it is not meant to imply that the present invention must rely on the above-mentioned detailed process equipment and process flow to be practiced. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention can be made, and the same should be considered as the disclosure of the present invention as long as the idea of the present invention is not violated.
Claims (10)
1. The high-damping paper cone is characterized by comprising the following components in parts by weight:
2. the high damping cone of claim 1, wherein the tencel fibers have a length of 2-4mm.
3. A method for preparing a high damping cone paper according to claim 1 or 2, characterized by comprising the following steps:
(1) Pulping bleached sulfate wood pulp, manila hemp pulp and bark pulp according to the proportion respectively and then mixing to obtain a component A;
(2) Pulping tencel fibers to obtain tencel fiber pulp;
(3) Adding water into the component A obtained in the step (1) and the tencel fiber slurry obtained in the step (2) according to a ratio, diluting and stirring the mixture to uniformly disperse the mixture, and filtering the mixture on a cone forming die to obtain a cone blank;
(4) Carrying out hot pressing on the cone blank obtained in the step (3) to obtain a cone blank;
(5) And (4) punching the cone blank obtained in the step (4) to obtain the high-damping cone.
4. The method as claimed in claim 3, wherein in the step (2), the beaten pulp is at a concentration of 0.5 to 1%.
5. The production method according to claim 3, wherein in the step (2), the weight of the beating is 0.5 to 2kg.
6. The production method according to claim 3, wherein in the step (2), the beating pitch of the beating is 0.1 to 0.5mm.
7. The production method according to claim 3, wherein in the step (2), the beating time of the beating is 30 to 180min.
8. The method according to claim 3, wherein in the step (4), the hot-pressing temperature is 150 to 200 ℃ and the hot-pressing time is 20 to 40s.
9. The method of any one of claims 3 to 8, comprising the steps of:
(1) Pulping bleached sulfate wood pulp, manila hemp pulp and bark pulp respectively according to a ratio, and mixing to obtain a component A;
(2) Pulping tencel fiber to obtain tencel fiber pulp, wherein the concentration of the pulped pulp is 0.5-1%, the hanging weight is 0.5-2kg, the pulping interval is 0.1-0.5mm, and the pulping time is 30-180min;
(3) Adding water into the component A obtained in the step (1) and the tencel fiber slurry obtained in the step (2) according to a ratio, diluting and stirring the mixture to uniformly disperse the mixture, and filtering the mixture on a cone forming die to obtain a cone blank;
(4) Hot-pressing the cone blank obtained in the step (3) at the hot-pressing temperature of 150-200 ℃ for 20-40s to obtain a cone blank;
(5) And (4) punching the cone blank obtained in the step (4) to obtain the high-damping cone.
10. Use of a high damping cone as claimed in claim 1 or 2 for the production of loudspeakers.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007312286A (en) * | 2006-05-22 | 2007-11-29 | Kenwood Corp | Speaker diaphragm |
| US20110114414A1 (en) * | 2009-06-12 | 2011-05-19 | Precision Fabrics Group, Inc. | Acoustically tunable sound absorption articles and methods of making same |
| US20160295330A1 (en) * | 2015-03-31 | 2016-10-06 | Bose Corporation | Acoustic Diaphragm |
| US20160295331A1 (en) * | 2015-03-31 | 2016-10-06 | Bose Corporation | Acoustic Diaphragm |
| CN111510845A (en) * | 2020-04-08 | 2020-08-07 | 国光电器股份有限公司 | Paper cone for loudspeaker and preparation method and application thereof |
| CN112609509A (en) * | 2020-12-08 | 2021-04-06 | 国光电器股份有限公司 | Waterproof air-proof paper cone and preparation method and application thereof |
-
2022
- 2022-11-17 CN CN202211442837.2A patent/CN115897297A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007312286A (en) * | 2006-05-22 | 2007-11-29 | Kenwood Corp | Speaker diaphragm |
| US20110114414A1 (en) * | 2009-06-12 | 2011-05-19 | Precision Fabrics Group, Inc. | Acoustically tunable sound absorption articles and methods of making same |
| US20160295330A1 (en) * | 2015-03-31 | 2016-10-06 | Bose Corporation | Acoustic Diaphragm |
| US20160295331A1 (en) * | 2015-03-31 | 2016-10-06 | Bose Corporation | Acoustic Diaphragm |
| CN111510845A (en) * | 2020-04-08 | 2020-08-07 | 国光电器股份有限公司 | Paper cone for loudspeaker and preparation method and application thereof |
| CN112609509A (en) * | 2020-12-08 | 2021-04-06 | 国光电器股份有限公司 | Waterproof air-proof paper cone and preparation method and application thereof |
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