CN112107111A - Brush wire and production equipment thereof - Google Patents
Brush wire and production equipment thereof Download PDFInfo
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- CN112107111A CN112107111A CN202010966919.1A CN202010966919A CN112107111A CN 112107111 A CN112107111 A CN 112107111A CN 202010966919 A CN202010966919 A CN 202010966919A CN 112107111 A CN112107111 A CN 112107111A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 48
- 238000009998 heat setting Methods 0.000 claims abstract description 34
- 239000004626 polylactic acid Substances 0.000 claims abstract description 29
- 229920000747 poly(lactic acid) Polymers 0.000 claims abstract description 28
- 239000012792 core layer Substances 0.000 claims abstract description 20
- 238000001125 extrusion Methods 0.000 claims abstract description 17
- 229920001707 polybutylene terephthalate Polymers 0.000 claims abstract description 16
- 229920000139 polyethylene terephthalate Polymers 0.000 claims abstract description 10
- 239000005020 polyethylene terephthalate Substances 0.000 claims abstract description 10
- 230000007246 mechanism Effects 0.000 claims abstract description 9
- -1 polybutylene terephthalate Polymers 0.000 claims abstract description 6
- 239000000155 melt Substances 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims abstract description 3
- 238000007493 shaping process Methods 0.000 claims description 57
- 239000010410 layer Substances 0.000 claims description 16
- 238000004804 winding Methods 0.000 claims description 6
- 238000004513 sizing Methods 0.000 description 36
- 238000000034 method Methods 0.000 description 13
- 230000008569 process Effects 0.000 description 13
- 239000011162 core material Substances 0.000 description 10
- 239000002994 raw material Substances 0.000 description 10
- JVTAAEKCZFNVCJ-REOHCLBHSA-N L-lactic acid Chemical compound C[C@H](O)C(O)=O JVTAAEKCZFNVCJ-REOHCLBHSA-N 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 229930182843 D-Lactic acid Natural products 0.000 description 3
- JVTAAEKCZFNVCJ-UWTATZPHSA-N D-lactic acid Chemical compound C[C@@H](O)C(O)=O JVTAAEKCZFNVCJ-UWTATZPHSA-N 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 229940022769 d- lactic acid Drugs 0.000 description 3
- 229920001519 homopolymer Polymers 0.000 description 3
- 229920002521 macromolecule Polymers 0.000 description 3
- 238000009987 spinning Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000008707 rearrangement Effects 0.000 description 2
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
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Images
Classifications
-
- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46D—MANUFACTURE OF BRUSHES
- A46D1/00—Bristles; Selection of materials for bristles
- A46D1/02—Bristles details
- A46D1/0207—Bristles characterised by the choice of material, e.g. metal
-
- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46D—MANUFACTURE OF BRUSHES
- A46D1/00—Bristles; Selection of materials for bristles
- A46D1/04—Preparing bristles
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- Nonwoven Fabrics (AREA)
Abstract
A brush wire is of a sheath-core structure, wherein a sheath material is at least one of PBT (polybutylene terephthalate) and PET (polyethylene terephthalate), a core layer material is PLA (polylactic acid), and the mass ratio of the sheath material to the core layer material is 4: 1-1: 2. The brush wire has high strength and good rebound resilience. The utility model provides an equipment of aforementioned brush silk of production, is including the melt extrusion device, water bath cooling device, drafting arrangement, heat setting device, the coiling mechanism that connect gradually, its characterized in that: the heat setting device comprises a setting roller component driven by a driving mechanism to rotate around the axis of the heat setting roller component and a heater for heating the setting roller component; the design roller subassembly includes the interval setting go up the design roller and the design roller down, and goes up the projection of design roller on the horizontal plane and the contained angle between the projection of design roller on the horizontal plane down is 1 ~ 6, goes up the projection of design roller on the vertical face and the contained angle between the projection of design roller on the vertical face down is 2 ~ 7. The brush wire production equipment can improve the resilience of the brush wire.
Description
Technical Field
The invention relates to the technical field of toothbrush wires, in particular to a toothbrush wire and production equipment thereof.
Background
The toothbrush is an indispensable daily consumption article for human life, and the use amount is extremely large. The rebound resilience of the brush wire is an important index for judging the performance of the brush wire, the brush wire with good rebound resilience is not easy to deform and disperse, and the brush wire can still maintain good shape after long-time use, thereby keeping good tooth brushing effect and use feeling, and having long service life.
Polylactic acid (PLA), also known as polylactide, which is a brush filament material, is a polymer polymerized from lactic acid as a main raw material, and belongs to the polyester family. The polylactic acid as the raw material of the brush wire has the following advantages: polylactic acid raw materials are fully renewable, pollution-free in the production process, good in biocompatibility and degradability, non-toxic and harmless to human bodies, and can be decomposed into carbon dioxide and water in the natural environment, so that the polylactic acid is a completely biodegradable green high polymer material; the polylactic acid material is proved to have antibacterial property; the polylactic acid material has good tensile strength and thermoplasticity, and can be produced by various processing modes, such as melt extrusion, injection molding and the like; the polylactic acid material has good glossiness and transparency, and the brush filaments prepared from the polylactic acid material have glittering and translucent color and luster, so that the toothbrush can have good visual impression. The above characteristics of polylactic acid make it a natural advantage as a raw material of brush filaments, especially toothbrush filaments. However, polylactic acid has the defects of high brittleness, poor heat resistance, low elongation at break and poor toughness, and the prepared brush wire has poor resilience, so that the application of the prepared brush wire in the field of brush wires is still limited.
Disclosure of Invention
The first technical problem to be solved by the present invention is to provide a brush wire with high strength and good resilience.
A second technical problem to be solved by the present invention is to provide a device for producing the brush wire, which can further improve the resilience of the brush wire.
The technical scheme adopted by the invention for solving the first technical problem is as follows: a brush wire, which is characterized in that: the core layer material is polylactic acid (PLA), and the mass ratio of the skin layer material to the core layer material is 4: 1-1: 2.
The PBT is spinning-grade PBT, the intrinsic viscosity is 1.013-1.016 dl/g, and the weight average molecular weight is 4-11 ten thousand; the PET is spinning grade PET, and the weight average molecular weight is 5-15 ten thousand; the PLA is a homopolymer or a copolymer of L-lactic acid and D-lactic acid, and the weight-average molecular weight is 7-18 ten thousand.
In order to further improve the resilience of the brush wire, the section of the core layer material is circular or elliptical, and the section of the skin layer material is circular or elliptical.
The technical solution adopted by the present invention to solve the second technical problem is as follows: the utility model provides an equipment of production brush silk as aforesaid, includes melt extrusion device, water bath cooling device, drafting arrangement, heat setting device, the coiling mechanism that connects gradually, its characterized in that: the heat setting device comprises a setting roller component driven by a driving mechanism to rotate around the axis of the heat setting roller component and a heater for heating the setting roller component; the design roller subassembly includes the last design roller and the lower design roller that the interval set up, just go up the projection of design roller on the horizontal plane with contained angle between the projection of design roller on the horizontal plane is 1 ~ 6 down, go up the projection of design roller on the vertical face with contained angle between the projection of design roller on the vertical face is 2 ~ 7 down.
In order to optimize the orientation degree and the crystallinity degree of the brush filaments so as to improve the resilience performance, the drafting device comprises a first drafting roller, a second drafting roller and a third drafting roller, and the rotating speed ratio of the first drafting roller, the second drafting roller and the third drafting roller is 1: 4.35-5.15: 4.5 to 6.
In order to make the arrangement of the sizing roller assembly simpler, the lower sizing roller is horizontally placed.
In order to make the design roller subassembly temperature more even, heat setting device still including inside have the cavity and the casing of cavity down, the heater hold in go up in the cavity, design roller subassembly hold in down in the cavity and with set up the outside actuating mechanism of casing is connected, go up in the cavity still be equipped with heater connection's fan, the exit linkage of fan has worn out go up the cavity and get into air-out pipe in the cavity down, it centers on to go out the air-out pipe design roller subassembly arrange just the interval is equipped with a plurality of air outlets on the air-out pipe.
For extension brush silk heat setting's winding length and heat setting time, be equipped with into silk mouth and play silk mouth on the lower chamber cavity wall, advance the silk mouth orientation the tangential setting of the corresponding department of lower design roller one end, go out the silk mouth orientation go up the tangential setting of the corresponding department of the design roller other end.
The melting extrusion device comprises a first single-screw extruder, a second single-screw extruder and a co-extrusion die head, wherein the first single-screw extruder is used for extruding a skin layer material, and the second single-screw extruder is used for extruding a core layer material; the core-skin structure flow channel is arranged in the co-extrusion die head, the co-extrusion die head is provided with a first inlet, a second inlet and an outlet which are communicated with the core-skin structure flow channel, the first inlet is connected with the outlet of the first single-screw extruder, and the second inlet is connected with the outlet of the second single-screw extruder.
In order to ensure that the heat setting effect of the brush filaments is better, the temperature of each setting roller is 160-190 ℃.
Further design, each stock roller is the cylinder roller, and the diameter of each stock roller is 600 ~ 900mm, and length is 800 ~ 1500 mm.
Compared with the prior art, the invention has the advantages that: the brush wire is prepared into a sheath-core structure by adopting a sheath material with better toughness, such as polybutylene terephthalate, polyethylene terephthalate and a core material with higher strength, namely polylactic acid, so that the brush wire can have higher strength and better resilience by combining the respective excellent performances of the sheath material and the core material, and even when the core material with higher brittleness breaks, the surface of the brush wire still maintains a complete state due to the connection of the sheath material, and even the brush wire is easier to bend and rebound due to the breakage of the core material, so that the overall toughness, resilience and glossiness are better; the production equipment of the brush filaments guides the brush filaments when the brush filaments are wound on the shaping roller assembly by arranging the included angles between the projections of the upper shaping roller and the lower shaping roller on the horizontal plane respectively, so that the brush filaments are transmitted and distributed along the shaping roller assembly, the winding length and the retention time of the brush filaments in the heat shaping device are prolonged, meanwhile, the included angles between the projections of the upper shaping roller and the lower shaping roller on the vertical plane respectively are arranged so that the brush filaments are heat-shaped under the condition of micro-tension, the rearrangement of the macro-molecule chain segments of the brush filaments under the tension is facilitated to keep better orientation degree and crystallinity, the tensile stress is released, and the resilience of the brush filaments is higher; by increasing the drafting multiple of the drafting process to 4.5-6, the orientation degree and the surface compactness of the brush wire can be greatly improved, and the strength and the resilience of the brush wire are further improved.
Drawings
FIG. 1 is a front view of an embodiment of the present invention;
FIG. 2 is a side view of an embodiment of the present invention;
figure 3 is a top view of a sizing roller assembly in an embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
The brush wire in the embodiment comprises a core layer material and a skin layer material coated on the periphery of the core layer material, wherein the skin layer material is at least one of PBT and PET, and the core layer material is PLA. The cross section of the core layer material is circular or elliptical, the cross section of the skin layer material is circular or elliptical, and the mass ratio of the skin layer material to the core layer material is 4: 1-1: 2. The brush silk in this embodiment has combined the respective excellent performance of cortex material and sandwich layer material and has higher intensity and better resilience, and even if when the great sandwich layer material of fragility breaks, the brush silk surface still maintains intact state because of the connection of cortex material, makes the brush silk change and buckle and kick-back owing to the fracture of sandwich layer material even, and whole toughness, resilience are better.
The production equipment of the brush filaments in the embodiment comprises a melt extrusion device, a water bath cooling device, a drafting device, a heat setting device and a winding device which are sequentially connected. As shown in fig. 1-2, the heat setting device includes a housing 1, a setting roller assembly, a heater 3, a fan 4, an air outlet pipe 5, and a driving mechanism 6.
As shown in fig. 1-2, the housing 1 has an upper chamber 11 and a lower chamber 12 inside. Therein, as shown in fig. 1, a heater 3 is received in the upper chamber 11 and is used to heat the sizing roller assembly. As shown in fig. 1, the sizing roller assembly is disposed in the lower chamber 12, and the sizing roller assembly is connected to a driving mechanism 6 disposed outside the housing 1 to drive each sizing roller in the sizing roller assembly to rotate about its own axis. As shown in fig. 1, a fan 4 connected to the heater 3 is further disposed in the upper chamber 11, an outlet of the fan 4 is connected to an air outlet pipe 5 passing through the upper chamber 11 and entering the lower chamber 12, a plurality of air outlets 51 are spaced on the air outlet pipe 5, and the air outlet pipe 5 is disposed around the sizing roller assembly, so that a heat medium heated by the heater 3, such as air, is delivered to the lower chamber 12 to heat the sizing roller assembly.
The shaping roller assembly comprises an upper shaping roller 21 and a lower shaping roller 22 (see fig. 1-3) which are arranged at intervals, an included angle between the projection of the upper shaping roller 21 on the horizontal plane and the projection of the lower shaping roller 22 on the horizontal plane is 1-6 degrees (see fig. 3), and an included angle between the projection of the upper shaping roller 21 on the vertical plane and the projection of the lower shaping roller 22 on the vertical plane is 2-7 degrees (see fig. 1). In this embodiment, as shown in fig. 1, the lower sizing roller 22 is placed horizontally. As shown in fig. 1-3, the upper sizing roller 21 and the lower sizing roller 22 are both cylindrical rollers, and the diameter of the upper sizing roller 21 and the diameter of the lower sizing roller 22 are 600-900 mm, and the length of the upper sizing roller 21 and the length of the lower sizing roller 22 are 800-1500 mm. In order to improve the heat setting effect of the brush filaments, the temperature of the upper setting roller 21 and the lower setting roller 22 is 160-190 ℃. As shown in fig. 1-2, a yarn inlet 121 and a yarn outlet 122 are provided on the wall of the lower chamber 12, the yarn inlet 121 is arranged tangentially toward the corresponding position of one end of the lower sizing roller 22, and the yarn outlet 122 is arranged tangentially toward the corresponding position of the other end of the upper sizing roller 21.
The production facility of brush silk in this embodiment is through setting up the contained angle between the projection of sizing roller 21 and lower sizing roller 22 respectively on the horizontal plane in order to lead when the brush silk twines on sizing roller subassembly, thereby make the brush silk along sizing roller subassembly transmission, arrange, the winding length and the dwell time of extension brush silk in heat setting device, simultaneously through setting up the contained angle between the projection of sizing roller 21 and lower sizing roller 22 respectively on the vertical plane so that the brush silk heat setting under the micro-tension condition, help brush silk macromolecule chain segment to keep better orientation degree and crystallinity at the rearrangement under tension, thereby release tensile stress, make the brush silk resilience higher.
The drafting device comprises a first drafting roller, a second drafting roller and a third drafting roller, wherein the rotating speed ratio of the first drafting roller to the third drafting roller is 1: 4.35-5.15: 4.5 ~ 6, the draft multiple of this drafting arrangement can improve the orientation degree and the surface compactness of brush silk greatly, and then improves the intensity and the resilience of brush silk.
The melt extrusion device comprises a first single-screw extruder, a second single-screw extruder and a co-extrusion die head, wherein the first single-screw extruder is used for extruding a skin layer material, and the second single-screw extruder is used for extruding a core layer material; the inside of the co-extrusion die head is provided with a skin-core structure runner, the co-extrusion die head is provided with a first inlet, a second inlet and an outlet which are communicated with the skin-core structure runner, the first inlet is connected with the outlet of the first single-screw extruder, and the second inlet is connected with the outlet of the second single-screw extruder.
Performance testing
First, the influence of the component proportion and the heat setting process on the resilience of the brush wire
1. Sample preparation
The raw materials of PBT and PLA components with the mass ratio of 100:0, 70:30, 50:50 and 30:70 in sequence are respectively used for preparing the brush wire with the sheath-core structure and the diameter of 0.18mm by brush wire production equipment, and the rebound rate (unit:%) of each sample is tested. Wherein, the PBT is spinning grade PBT, the intrinsic viscosity is 1.016dl/g, and the weight average molecular weight is 8 ten thousand; PLA is a homopolymer or copolymer of L-lactic acid and D-lactic acid, and has a weight average molecular weight of 12 ten thousand. The rotation speed ratio of the first drafting roller to the third drafting roller in the drafting device is 1: 5. The heat setting device adopts the following 5 heat setting processes respectively: firstly, offline shaping is carried out, and steam is injected into a steam pressure tank (the steam temperature is 120 ℃, the steam pressure is 0.2MPa, and the time is 20 min); secondly, online shaping (the upper shaping roller and the lower shaping roller are arranged in parallel); thirdly, online shaping (the included angle between the projections of the upper shaping roller and the lower shaping roller on the horizontal plane is 3 degrees, and no included angle is formed between the projections of the upper shaping roller and the lower shaping roller on the vertical plane); the online shaping (the projection of the upper shaping roller and the lower shaping roller on the horizontal plane has no included angle, and the projection of the upper shaping roller and the lower shaping roller on the vertical plane has an included angle of 2 degrees); and fifthly, performing online shaping (the included angle between the projections of the upper shaping roller and the lower shaping roller on the horizontal plane is 3 degrees, and the included angle between the projections of the upper shaping roller and the lower shaping roller on the vertical plane is 2 degrees).
2. The test results are given in the following table:
TABLE 1 rebound of brush filaments at different component ratios and under different heat setting process conditions
As shown in Table 1, under the same heat setting process condition, the rebound rate of each sample tends to increase and then decrease with the increase of the content of PLA in the mixed raw material, and when the mass ratio of the components of PBT and PLA in the mixed raw material is 70:30, the rebound rate of the brush wire reaches the maximum value; in addition, when the ratio of the PBT component to the PLA component in the mixed raw material reaches 30:70, the heat setting process of the brush filaments can cause the fracture of the brush filaments, and the fracture of the brush filaments is mainly caused by the following reasons: the PLA content in the brush wire is too high, and the toughness of cortex material PBT is broken through by core layer material PLA, causes the whole fragility of brush wire still great and easily breaks, to sum up to know, the component mass ratio of PBT of skin core structure and PLA need maintain in reasonable interval, can full play PBT and PLA advantage between them, makes the brush wire have good resilience.
As shown in table 1, taking the mass ratios of the PBT and PLA in the mixed raw material as 100:0, 70:30 and 50:50 in sequence as examples, the rebound rate of the brush wire in the on-line sizing process is generally higher than that of the brush wire prepared in the off-line sizing process under the condition of the same component ratio; moreover, the rebound rate of the brush filaments prepared when the upper sizing roller and the lower sizing roller form an included angle between the projections of the horizontal plane and/or the vertical plane is higher than that of the brush filaments prepared when the upper sizing roller and the lower sizing roller are arranged in parallel; in addition, the rebound rate of the brush filaments prepared when an included angle exists between the projections of the upper sizing roller and the lower sizing roller on the horizontal plane is lower than that of the brush filaments prepared when an included angle exists between the projections of the upper sizing roller and the lower sizing roller on the vertical plane; finally, the rebound rate of the brush silk of going up the design roller and preparing when all there is the contained angle with lower design roller between the projection of horizontal plane and vertical face is higher than the rebound rate of the brush silk of going up the design roller and preparing when lower design roller has the contained angle between the projection of horizontal plane or vertical face, causes the leading cause of above-mentioned result difference to lie in: go up the design roller and decide the angle mainly used between the projection of roller difference on the horizontal plane down and lead when the brush silk twines on design roller subassembly, thereby make the brush silk along design roller subassembly transmission, arrange, the winding length and the dwell time of extension brush silk in heat setting device, and go up design roller and decide the angle between the projection of roller difference on vertical face down mainly used for making the brush silk heat setting under the micro-tension condition, help brush silk macromolecule chain segment to rearrange under tension and keep better orientation degree and crystallinity, thereby release tensile stress, it can know on a large scale, all there is the angle through making last design roller and lower design roller between the projection of horizontal plane and vertical face, can make the brush silk heat setting under the micro-tension condition, effectively release the tensile stress of brush silk, make the brush silk resilience higher.
Second, the influence of the drafting multiple and the heat setting process on the resilience of the brush wire
1. Sample preparation
Raw materials with the mass ratio of PET to PLA being 50:50 in sequence are taken to be sequentially processed by brush wire production equipment to prepare brush wires with the diameter of 0.18mm, and the rebound rate (unit:%) of each sample is tested. Wherein, the PET is spinning grade PET, and the weight average molecular weight is 10 ten thousand; PLA is a homopolymer or copolymer of L-lactic acid and D-lactic acid, and has a weight average molecular weight of 12 ten thousand. The rotating speed ratio of the first drafting roller to the third drafting roller in the drafting device is 1:3, 1:4, 1:5 and 1:6 respectively. The heat setting device adopts the following 5 heat setting processes respectively: firstly, offline shaping is carried out, and steam is injected into a steam pressure tank (the steam temperature is 120 ℃, the steam pressure is 0.2MPa, and the time is 20 min); secondly, online shaping (the upper shaping roller and the lower shaping roller are arranged in parallel); online shaping (the included angle between the projections of the upper shaping roller and the lower shaping roller on the horizontal plane is 2 degrees, and no included angle is formed between the projections of the upper shaping roller and the lower shaping roller on the vertical plane); the online shaping (no included angle exists between the projections of the upper shaping roller and the lower shaping roller on the horizontal plane, and the included angle between the projections of the upper shaping roller and the lower shaping roller on the vertical plane is 3 degrees); and fifthly, performing online shaping (the included angle between the projections of the upper shaping roller and the lower shaping roller on the horizontal plane is 2 degrees, and the included angle between the projections of the upper shaping roller and the lower shaping roller on the vertical plane is 3 degrees).
2. The test results are given in the following table:
TABLE 2 rebound of brush filaments at different draft ratios and different sizing process conditions
As shown in table 2, under the same heat setting process condition, as the rotation speed ratio of the first drawing roller and the third drawing roller increases, the rebound rate of the brush filaments tends to increase and then decrease, and when the rotation speed ratio of the first drawing roller and the third drawing roller is 1:5, the rebound rate of the brush filaments reaches the maximum value; moreover, under the condition of the same rotating speed ratio, the rebound rate of the brush filaments prepared by different heat setting processes still meets the rule that the online setting is better than the offline setting, and an included angle between the projections of the upper setting roller and the lower setting roller on the horizontal plane and/or the vertical plane is better than the parallel arrangement of the upper setting roller and the lower setting roller; the main reasons for the difference of the above phenomena are: when the rotation speed ratio of the first drafting roller to the third drafting roller is 1: and 3, the brush filaments are not completely drafted, the rebound rate of the brush filaments is low due to too low orientation degree of the macromolecular chain segments along the filament bundle direction, but after the brush filaments are subjected to heat setting by an upper setting roller and a lower setting roller which form an included angle between projections of a horizontal plane and/or a vertical plane, the rebound rate is also improved, when the rotating speed ratio of the first drafting roller to the third drafting roller is 1:6, the stretching stress is high after the macromolecular chain segments are excessively drafted, the stretching stress is probably not completely released or the macromolecular chain segments are not rearranged in place, so that the rebound rate is reduced, and the brush filaments can have good rebound resilience by selecting a proper drafting multiple for the brush filaments with the sheath-core structure.
Claims (10)
1. A brush wire, which is characterized in that: the core layer comprises a core layer material and a skin layer material coated on the periphery of the core layer material, wherein the skin layer material is at least one of polybutylene terephthalate and polyethylene terephthalate, the core layer material is polylactic acid, and the mass ratio of the skin layer material to the core layer material is 4: 1-1: 2.
2. The filament according to claim 1, wherein: the cross section of the core layer material is circular or elliptical, and the cross section of the skin layer material is circular or elliptical.
3. An apparatus for producing the brush filament according to any one of claims 1 to 2, comprising a melt extrusion device, a water bath cooling device, a drafting device, a heat setting device and a winding device which are connected in sequence, wherein: the heat setting device comprises a setting roller component driven by a driving mechanism (6) to rotate around the axis of the heat setting roller component and a heater (3) for heating the setting roller component; the design roller subassembly includes last design roller (21) and lower design roller (22) that the interval set up, just go up design roller (21) on the horizontal plane the projection with the contained angle between the projection of lower design roller (22) on the horizontal plane is 1 ~ 6, go up design roller (21) on the vertical projection with the contained angle between the projection of lower design roller (22) on the vertical is 2 ~ 7.
4. The production apparatus of brush filaments according to claim 3, wherein: the drafting device comprises a first drafting roller, a second drafting roller and a third drafting roller, and the rotating speed ratio of the first drafting roller to the third drafting roller is 1: 4.35-5.15: 4.5 to 6.
5. The production apparatus of brush filaments according to claim 3, wherein: the lower shaping roller (22) is horizontally arranged.
6. The production apparatus of brush filaments according to claim 3, wherein: heat setting device still include inside casing (1) that has last cavity (11) and lower cavity (12), heater (3) hold in go up cavity (11), set the roller subassembly and hold in lower cavity (12) and with set up be in casing (1) outside actuating mechanism (6) are connected, go up still be equipped with in cavity (11) with fan (4) that heater (3) are connected, the exit linkage of fan (4) is worn out go up cavity (11) and enter air-out pipe (5) in lower cavity (12), air-out pipe (5) center on set the roller subassembly arrange just the interval is equipped with a plurality of air outlets (51) on air-out pipe (5).
7. The apparatus for producing brush filaments according to claim 6, wherein: be equipped with into silk mouth (121) and go out silk mouth (122) on lower cavity (12) chamber wall, it faces to advance silk mouth (121) the tangential setting of the department that stereotypes roller (22) one end down corresponds, go out silk mouth (122) orientation go up the tangential setting that stereotypes roller (21) other end corresponds the department.
8. The production apparatus of brush filaments according to claim 3, wherein: the melt extrusion device comprises a first single-screw extruder, a second single-screw extruder and a co-extrusion die head, wherein the first single-screw extruder is used for extruding a skin layer material, and the second single-screw extruder is used for extruding a core layer material; the core-skin structure flow channel is arranged in the co-extrusion die head, the co-extrusion die head is provided with a first inlet, a second inlet and an outlet which are communicated with the core-skin structure flow channel, the first inlet is connected with the outlet of the first single-screw extruder, and the second inlet is connected with the outlet of the second single-screw extruder.
9. The production apparatus of brush filaments according to claim 3, wherein: the temperature of each shaping roller is 160-190 ℃.
10. The production apparatus of brush filaments according to claim 3, wherein: each shaping roller is a cylindrical roller, the diameter of each shaping roller is 600-900 mm, and the length of each shaping roller is 800-1500 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010966919.1A CN112107111B (en) | 2020-09-15 | 2020-09-15 | Production equipment of brush filaments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010966919.1A CN112107111B (en) | 2020-09-15 | 2020-09-15 | Production equipment of brush filaments |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112107111A true CN112107111A (en) | 2020-12-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113057440A (en) * | 2021-03-17 | 2021-07-02 | 安徽三和刷业有限公司 | Brush hair integration production facility |
| CN114951339A (en) * | 2022-06-29 | 2022-08-30 | 廊坊辰兴机械有限公司 | Feeding device of wire rolling mill |
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| CN112107111B (en) | 2022-12-09 |
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