CN111519347A - Polyester fiberboard based on hemp straw waste and production process thereof - Google Patents
Polyester fiberboard based on hemp straw waste and production process thereof Download PDFInfo
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- CN111519347A CN111519347A CN202010361652.3A CN202010361652A CN111519347A CN 111519347 A CN111519347 A CN 111519347A CN 202010361652 A CN202010361652 A CN 202010361652A CN 111519347 A CN111519347 A CN 111519347A
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
- D04H1/48—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation
- D04H1/485—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation in combination with weld-bonding
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/425—Cellulose series
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/541—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/542—Adhesive fibres
- D04H1/55—Polyesters
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Abstract
The invention relates to the technical field of sound-absorbing boards, in particular to a polyester fiberboard based on hemp straw waste and a production process thereof. The method comprises the steps of preparing hemp fibers by using hemp straw waste as a raw material, preparing low-melting-point fibers by melt spinning, mixing, opening, carding, lapping and needling to obtain a fiberboard body, spraying a flame retardant on the fiberboard body, drying, calendering, cooling and cutting to obtain a polyester fiberboard; the polyester fiber board is prepared from the following components, by weight, 50-60 parts of hemp fibers, 40-50 parts of low-melting-point fibers, and the NRC sound absorption coefficient of the polyester fiber board is not less than 0.90. In the production process of the polyester fiber board, the method comprises the following steps: (1) preparing raw materials (2), mixing into a net (3), reinforcing a fiber net (4), spraying a flame retardant (5), drying, calendaring, cooling (6), and cutting and finishing. The environment-friendly sound-absorbing material is environment-friendly, energy-saving, highly hygroscopic, highly breathable, well sound-absorbing, capable of effectively resisting bacteria, inhibiting mites, preventing mildew and insulating sound, degradable and high in strength.
Description
Technical Field
The invention relates to the technical field of sound-absorbing boards, in particular to a polyester fiberboard based on hemp straw waste and a production process thereof.
Background
The polyester fiber sound-absorbing board is a decorative material which is made of polyester fiber as a raw material through hot press molding and has the sound-absorbing function. The polyester fiber acoustic board has the characteristics of sound absorption, heat insulation and heat preservation, and the board is uniform and firm in material, rich in elasticity, toughness, wear resistance, impact resistance, tearing resistance, difficult to scratch and large in board width. The sound-absorbing material has the characteristics of decoration, heat preservation, flame retardance, environmental protection, light weight, easiness in processing, stability, impact resistance, simplicity and convenience in maintenance and the like, is a preferred decoration sound-absorbing material for indoor decoration, and is widely applied to activity places gathered by the public, such as families, markets, hotels, KTVs, movie theaters, dance halls, auditoriums, multifunctional halls, gymnasiums and the like.
In the prior art, most of sound-absorbing boards are polyester fiber sound-absorbing boards with porous structures formed by fibrous, granular or foaming materials, so that the sound-absorbing effect is achieved. When the polyester fiber sound-absorbing board is made of a fibrous plastic material, the fibrous plastic material is usually stacked layer by needling, and then the fiber web formed after stacking is reinforced to finally form the polyester fiber board. The polyester fiber sound-absorbing board prepared by the method has the advantages that the holes are mainly formed by needling through a limited number of felting needles, so that the number of the holes is relatively small, and the sound-absorbing effect is poor.
Hemp fiber is widely used in textile industry because of its moisture absorption, air permeability, antibacterial, and ultraviolet resistance. After China hemp is ripe and harvested, bast fibers stripped from stems of the China hemp can be prepared into two fibers, one is long hemp and the other is noil. The hemp straw can be thrown away or used for producing paper pulp to produce writing paper and printing paper, and some hemp straws can be used for cooking even by burning, so that the utilization value of hemp is reduced. With the increasing environmental pollution, it is imperative to utilize hemp straw waste to prepare degradable, sound-absorbing and flame-retardant polyester fiber boards.
Patent CN 106968049A discloses a fire-retardant sound-absorbing board based on polyester fiber material and production technology thereof to old and useless plastics are the raw materials, make regeneration polyester staple fiber, regeneration low melting point skin core type polyester staple fiber through melt spinning, evenly spray the fire retardant at the upper surface of panel body, and the partial thickness of lower surface soaks the fire retardant, through the predrying, the cooling of cold wind after the press polish, obtains fire-retardant sound-absorbing board after the cutting, and the technology includes following step: (1) preparing raw materials: (2) and web formation of the mixed regenerated short fibers: (3) reinforcing the fiber net (4), spraying and impregnating a flame retardant: (5) pre-drying, press polishing and cooling: (6) and cutting and finishing. Although the patent utilizes the method of simultaneously acting spraying and immersion liquid to carry out the upper spraying and lower immersion of the fire retardant, the sound-absorbing board can effectively ensure good flame-retardant effect. But also has the following disadvantages: firstly, the sound-absorbing pores on the flame-retardant sound-absorbing plate prepared by the patent are mainly the pores caused by needling through a limited number of felting needles, so that the number of the pores is relatively small, and the sound-absorbing effect is poor. Secondly, the sound-absorbing board prepared by using waste plastics as raw materials is difficult to degrade because the waste plastics are made of plastics when a new sound-absorbing board needs to be replaced, and the environment is polluted after the waste plastics are discarded at will, so that the sound-absorbing board is not beneficial to environmental protection.
The patent CN 107160762A discloses an environment-friendly jute board applied to wall decoration and a preparation method thereof, and the jute board comprises jute fiber boards, wherein the jute fiber boards are formed by stacking and assembling jute fiber layers, and a polyester fiber layer is arranged between each jute fiber layer; the jute fiber layer has the surface density of 60-200 g/square meter and the thickness of 0.5-2 mm; the polyester fiber layer has the surface density of 70-500 g/square meter. The patent is made by needle punching jute fiber sheets after stacking jute fiber sheets and polyester fiber sheets one on top of the other. Because the jute fiber layer and the polyester fiber layer are stacked at intervals and the jute fiber and the polyester fiber are not intertwined with each other, the board prepared by the interval stacking has small and few pores and is harder, so that the air permeability is poor and the sound absorption effect is poor.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the polyester fiberboard which is environment-friendly, energy-saving, extremely strong in hygroscopicity and air permeability, good in sound absorption effect, capable of effectively resisting bacteria, inhibiting mites, preventing mildew and insulating sound and degradable and is based on hemp straw waste and the production process thereof.
The technical scheme adopted by the invention for realizing the purpose is as follows: a polyester fiber board based on hemp straw waste is prepared by using hemp straw waste as a raw material to prepare hemp fibers, then preparing low-melting-point fibers through melt spinning, obtaining a fiber board body through mixing, opening, carding, lapping and needling reinforcement, spraying a flame retardant on the fiber board body, drying, calendering, cooling and cutting to obtain the polyester fiber board; the polyester fiber board is prepared from the following components, by weight, 50-60 parts of China-hemp fibers and 40-50 parts of low-melting-point fibers, wherein the NRC sound absorption coefficient of the polyester fiber board is not less than 0.90, the surface density of the polyester fiber board is 1.6-1.8kg per square meter, and the thickness of the polyester fiber board is 8-10 mm.
According to the polyester fiberboard based on hemp straw waste, the length of hemp fibers is 51-65mm, the fineness of the hemp fibers is 6-11D, and the length of low-melting-point fibers is 51mm, and the fineness of the low-melting-point fibers is 4D.
The polyester fiber board based on hemp straw waste is prepared from the following components, by weight, 50 parts of hemp fibers and 50 parts of low-melting-point fibers.
A production process of polyester fiber boards based on hemp straw waste comprises the following steps:
(1) preparing raw materials: hemp straw waste and waste plastic are used as raw materials to respectively prepare hemp fibers and low-melting-point polyester fibers;
(2) and mixing into a net: opening, mixing, carding and lapping the hemp fibers and the low-melting-point polyester fibers prepared in the step (1), and overlapping layer by layer to form a net wadding with a certain thickness to finally form a uniform fiber net;
(3) and reinforcing the fiber net: reinforcing the fiber net prepared in the step (2) by adopting a four-needle repeated reinforcement mode to form a polyester fiber plate body;
(4) and spraying a flame retardant: uniformly spraying a flame retardant on the polyester fiber board body after needling reinforcement;
(5) drying, calendaring and cooling: continuously feeding the polyester fiber plate body sprayed with the flame retardant into a drying device and a flatting mill, drying and then heating to enable China hemp fibers and low-melting-point polyester fibers in the polyester fiber plate body to be co-melted and mixed, adhering and reinforcing the China hemp fibers and the low-melting-point polyester fibers, solidifying the flame retardant on the fibers of the polyester fiber plate body, and finally cooling and forming the polyester fiber plate through a cooling roller;
(6) and cutting and finishing: and cutting the polyester fiber board according to the required size, and finishing and warehousing.
In the production process of the polyester fiber board based on hemp straw waste, the flame retardant is uniformly sprayed on the upper surface of the polyester fiber board body along the width of the polyester fiber board body in the spraying mode of the flame retardant in the step (4), the lower surface of the polyester fiber board body enters the flame retardant container, so that the flame retardant permeates into the polyester fiber board body from the lower surface of the polyester fiber board body, the permeating thickness is half of the thickness of the polyester fiber board body, and the flame retardant soaks the polyester fiber board body from outside to inside.
In the production process of the polyester fiberboard based on hemp straw waste, the drying temperature in the step (5) is 150 ℃ and 180 ℃, and the drying time is 10-15 min.
In the production process of the polyester fiberboard based on hemp straw waste, in the step (5), the drying equipment comprises a first section of drying box and a second section of drying box, and the liquid waiting rate of the polyester fiber board body dried by the first section of drying box is 10%.
The polyester fiberboard based on hemp straw waste and the production process thereof have the beneficial effects that: firstly, hemp straw waste is combined with low-melting-point fibers, and the polyester fiberboard with sound absorption and flame retardant functions is prepared after needling reinforcement and flame retardant spraying. This polyester fiber board is owing to adopted china-hemp fibre straw waste material, and not only raw materials cost is low, environmental protection and energy saving, moreover because china-hemp self has porous structure to and adopt the acupuncture reinforcement technique, make polyester fiber board have more holes, make sound absorbing effect good. More importantly, after the China-hemp fibers and the China-hemp fibers are fused and bonded through the low-melting-point fibers, the China-hemp fibers and the China-hemp fibers are intertwined to generate a plurality of fiber gaps, so that the number of pores is further increased, and the porosity of the polyester fiber board is greatly improved, so that the sound absorption effect is better, and the sound absorption rate is greatly improved. Secondly, polyester fiber board's porous structure for polyester fiber board has extremely strong hygroscopicity and gas permeability, and because china-hemp fiber has natural antibacterial property and degradability, make polyester fiber board not only can effectively antibiotic, suppress mite, mould proof, syllable-dividing effect, still have the degradability, thereby can effectively protect the environment.
The preparation process of the polyester fiber provided by the invention utilizes a method of simultaneously acting spraying and immersion liquid to carry out upper spraying and lower immersion of the flame retardant, so that the liquid-waiting rate of the sound-absorbing board can be reasonably controlled, the preparation is prepared for the subsequent drying process, the sound-absorbing board can be ensured to have good moldability after being dried while the good flame retardant effect is effectively ensured, the hardness reaches the standard, and the traditional phenomenon that the formation of the three-dimensional net shape of the fiber is influenced by the nonuniform melting inside the fiber due to the excessive addition of the flame retardant can be avoided. And the flame retardant is uniformly distributed in the fibers of the sound-absorbing board, so that the flame retardant effect cannot be reduced due to normal use, and the optimal integral flame retardant effect of the sound-absorbing board is ensured. The combustion performance conforms to the B1-grade regulation of GB8624, no formaldehyde emission exists, and the fiber board is degradable, so that the fiber board is high-strength environment-friendly flame-retardant fiber board with high quality and low price. Therefore, the product generated by the preparation system is environment-friendly, energy-saving, free of peculiar smell, extremely strong in hygroscopicity and air permeability, good in sound absorption effect, capable of effectively resisting bacteria, inhibiting mites, preventing mildew, insulating sound, degradable, widely applicable to the aspects of building interior decoration, flame-retardant furniture production, flame-retardant floor production, ship and vehicle interior decoration and the like, and has good economic and social benefits.
Detailed Description
The present invention will be described in further detail with reference to specific examples;
example 1
A polyester fiber board based on hemp straw waste is prepared by using hemp straw waste as a raw material to prepare hemp fibers, then preparing low-melting-point fibers through melt spinning, obtaining a fiber board body through mixing, opening, carding, lapping and needling reinforcement, spraying a flame retardant on the fiber board body, drying, calendering, cooling and cutting to obtain the polyester fiber board; the polyester fiber board is prepared from the following components, by weight, 50 parts of hemp fibers and 50 parts of low-melting-point fibers, wherein the NRC sound absorption coefficient of the polyester fiber board is 0.91. The polyester fiber board has the surface density of 1.8kg per square meter, the thickness of 10mm and the length of 1.2 m. The length of the hemp fiber is 51mm, the fineness is 6D, the length of the low-melting-point fiber is 51mm, and the fineness is 4D.
A production process of polyester fiber boards based on hemp straw waste comprises the following steps:
(1) preparing raw materials: hemp straw waste and waste plastic are used as raw materials to respectively prepare hemp fibers and low-melting-point polyester fibers;
(2) and mixing into a net: opening, mixing, carding and lapping the hemp fibers and the low-melting-point polyester fibers prepared in the step (1), and overlapping layer by layer to form a net wadding with a certain thickness to finally form a uniform fiber net; wherein the hemp fiber accounts for 50 parts by weight, the low-melting-point fiber accounts for 50 parts by weight, the length of the low-melting-point fiber is 51mm, and the fineness is 4D;
(3) and reinforcing the fiber net: reinforcing the fiber net prepared in the step (2) by adopting a four-needle repeated reinforcement mode to form a polyester fiber plate body;
(4) and spraying a flame retardant: uniformly spraying a flame retardant on the polyester fiber board body after needling reinforcement; the spraying mode of the flame retardant is that the flame retardant is uniformly sprayed on the upper surface of the polyester fiber plate body along the width of the polyester fiber plate body, and the lower surface of the polyester fiber plate body enters the flame retardant container, so that the flame retardant permeates into the polyester fiber plate body from the lower surface of the polyester fiber plate body, the permeating thickness is half of the thickness of the polyester fiber plate body, and the flame retardant is enabled to soak the polyester fiber plate body from outside to inside;
(5) drying, calendaring and cooling: continuously feeding the polyester fiber board body sprayed with the flame retardant into drying equipment and a flatting mill, drying and then heating to mix jute fibers and low-melting-point polyester fibers in the polyester fiber board body, adhering and reinforcing the jute fibers and the low-melting-point polyester fibers to each other, solidifying the flame retardant on the fibers of the polyester fiber board body, and finally cooling and molding the polyester fiber board body by a cooling roller to obtain a polyester fiber board; the drying equipment comprises a first section of drying box and a second section of drying box, and the liquid waiting rate of the polyester fiber plate body dried by the first section of drying box is 10%; the temperature of the first section of drying box is 150 ℃, the temperature of the second section of drying box is 160 ℃, and the conveying speed of the polyester fiber plate body in the first section of drying box and the second section of drying box is 0.8 m/min;
(6) and cutting and finishing: and cutting the polyester fiber board according to the required size, and finishing and warehousing.
Example 2
A polyester fiber board based on hemp straw waste is prepared by using hemp straw waste as a raw material to prepare hemp fibers, then preparing low-melting-point fibers through melt spinning, obtaining a fiber board body through mixing, opening, carding, lapping and needling reinforcement, spraying a flame retardant on the fiber board body, drying, calendering, cooling and cutting to obtain the polyester fiber board; the polyester fiber board is prepared from the following components, by weight, 55 parts of hemp fibers and 45 parts of low-melting-point fibers, wherein the NRC sound absorption coefficient of the polyester fiber board is 0.90. The polyester fiber board has the surface density of 1.9kg per square meter, the thickness of 11mm and the length of 1.2 m. The length of the hemp fiber is 56mm, the fineness is 8D, the length of the low-melting-point fiber is 51mm, and the fineness is 4D.
A production process of polyester fiber boards based on hemp straw waste comprises the following steps:
(1) preparing raw materials: hemp straw waste and waste plastic are used as raw materials to respectively prepare hemp fibers and low-melting-point polyester fibers;
(2) and mixing into a net: opening, mixing, carding and lapping the hemp fibers and the low-melting-point polyester fibers prepared in the step (1), and overlapping layer by layer to form a net wadding with a certain thickness to finally form a uniform fiber net; the hemp fiber is prepared from 55 parts by weight of hemp fiber and 45 parts by weight of low-melting-point fiber, wherein the length of the low-melting-point fiber is 51mm, and the fineness is 4D;
(3) and reinforcing the fiber net: reinforcing the fiber net prepared in the step (2) by adopting a four-needle repeated reinforcement mode to form a polyester fiber plate body;
(4) and spraying a flame retardant: uniformly spraying a flame retardant on the polyester fiber board body after needling reinforcement; the spraying mode of the flame retardant is that the flame retardant is uniformly sprayed on the upper surface of the polyester fiber plate body along the width of the polyester fiber plate body, and the lower surface of the polyester fiber plate body enters the flame retardant container, so that the flame retardant permeates into the polyester fiber plate body from the lower surface of the polyester fiber plate body, the permeating thickness is half of the thickness of the polyester fiber plate body, and the flame retardant is enabled to soak the polyester fiber plate body from outside to inside;
(5) drying, calendaring and cooling: continuously feeding the polyester fiber board body sprayed with the flame retardant into drying equipment and a flatting mill, drying and then heating to mix jute fibers and low-melting-point polyester fibers in the polyester fiber board body, adhering and reinforcing the jute fibers and the low-melting-point polyester fibers to each other, solidifying the flame retardant on the fibers of the polyester fiber board body, and finally cooling and molding the polyester fiber board body by a cooling roller to obtain a polyester fiber board; the drying equipment comprises a first section of drying box and a second section of drying box, and the liquid waiting rate of the polyester fiber plate body dried by the first section of drying box is 10%; the temperature of the first section of drying box is 150 ℃, the temperature of the second section of drying box is 170 ℃, and the conveying speed of the polyester fiber plate body in the first section of drying box and the second section of drying box is 0.8 m/min;
(6) and cutting and finishing: and cutting the polyester fiber board according to the required size, and finishing and warehousing.
Example 3
A polyester fiber board based on hemp straw waste is prepared by using hemp straw waste as a raw material to prepare hemp fibers, then preparing low-melting-point fibers through melt spinning, obtaining a fiber board body through mixing, opening, carding, lapping and needling reinforcement, spraying a flame retardant on the fiber board body, drying, calendering, cooling and cutting to obtain the polyester fiber board; the polyester fiber board is prepared from the following components, by weight, 60 parts of hemp fibers and 40 parts of low-melting-point fibers, wherein the NRC sound absorption coefficient of the polyester fiber board is 0.90. The polyester fiber board has the surface density of 2 kg/square meter, the thickness of 12mm and the length of 1.2 m. The length of the hemp fiber is 65mm, the fineness is 11D, the length of the low-melting-point fiber is 51mm, and the fineness is 4D.
A production process of polyester fiber boards based on hemp straw waste comprises the following steps:
(1) preparing raw materials: hemp straw waste and waste plastic are used as raw materials to respectively prepare hemp fibers and low-melting-point polyester fibers;
(2) and mixing into a net: opening, mixing, carding and lapping the hemp fibers and the low-melting-point polyester fibers prepared in the step (1), and overlapping layer by layer to form a net wadding with a certain thickness to finally form a uniform fiber net; wherein the hemp fiber accounts for 50 parts by weight, the low-melting-point fiber accounts for 50 parts by weight, the length of the low-melting-point fiber is 51mm, and the fineness is 4D;
(3) and reinforcing the fiber net: reinforcing the fiber net prepared in the step (2) by adopting a four-needle repeated reinforcement mode to form a polyester fiber plate body;
(4) and spraying a flame retardant: uniformly spraying a flame retardant on the polyester fiber board body after needling reinforcement; the spraying mode of the flame retardant is that the flame retardant is uniformly sprayed on the upper surface of the polyester fiber plate body along the width of the polyester fiber plate body, and the lower surface of the polyester fiber plate body enters the flame retardant container, so that the flame retardant permeates into the polyester fiber plate body from the lower surface of the polyester fiber plate body, the permeating thickness is half of the thickness of the polyester fiber plate body, and the flame retardant is enabled to soak the polyester fiber plate body from outside to inside;
(5) drying, calendaring and cooling: continuously feeding the polyester fiber board body sprayed with the flame retardant into drying equipment and a flatting mill, drying and then heating to mix jute fibers and low-melting-point polyester fibers in the polyester fiber board body, adhering and reinforcing the jute fibers and the low-melting-point polyester fibers to each other, solidifying the flame retardant on the fibers of the polyester fiber board body, and finally cooling and molding the polyester fiber board body by a cooling roller to obtain a polyester fiber board; the drying equipment comprises a first section of drying box and a second section of drying box, and the liquid waiting rate of the polyester fiber plate body dried by the first section of drying box is 10%; the temperature of the first section of drying box is 160 ℃, the temperature of the second section of drying box is 180 ℃, and the conveying speed of the polyester fiber plate body in the first section of drying box and the second section of drying box is 0.8 m/min;
(6) and cutting and finishing: and cutting the polyester fiber board according to the required size, and finishing and warehousing.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made according to the spirit of the present disclosure should be covered within the scope of the present disclosure.
Claims (7)
1. The polyester fiberboard based on hemp straw waste is characterized in that: firstly, preparing China-hemp fibers by using China-hemp straw waste as a raw material, then preparing low-melting-point fibers through melt spinning, mixing, opening, carding, lapping and needling for reinforcement to obtain a fiberboard body, spraying a flame retardant on the fiberboard body, drying, calendering, cooling and cutting to obtain a polyester fiberboard; the polyester fiber board is prepared from the following components, by weight, 50-60 parts of China-hemp fibers and 40-50 parts of low-melting-point fibers, wherein the NRC sound absorption coefficient of the polyester fiber board is not less than 0.90, the surface density of the polyester fiber board is 1.8-2kg per square meter, and the thickness of the polyester fiber board is 10-12 mm.
2. The polyester fiberboard based on hemp straw waste as claimed in claim 1, wherein: the hemp fiber has the length of 51-65mm and the fineness of 6-11D, and the low-melting-point fiber has the length of 51mm and the fineness of 4D.
3. The polyester fiberboard based on hemp straw waste as claimed in claim 1, wherein: the polyester fiber board is prepared from the following components, by weight, 50 parts of hemp fibers and 50 parts of low-melting-point fibers.
4. A process for producing polyester fiber board based on hemp straw waste according to any one of claims 1 to 3, comprising the steps of:
(1) preparing raw materials: hemp straw waste and waste plastic are used as raw materials to respectively prepare hemp fibers and low-melting-point polyester fibers;
(2) and mixing into a net: opening, mixing, carding and lapping the hemp fibers and the low-melting-point polyester fibers prepared in the step (1), and overlapping layer by layer to form a net wadding with a certain thickness to finally form a uniform fiber net;
(3) and reinforcing the fiber net: reinforcing the fiber net prepared in the step (2) by adopting a four-needle repeated reinforcement mode to form a polyester fiber plate body;
(4) and spraying a flame retardant: uniformly spraying a flame retardant on the polyester fiber board body after needling reinforcement;
(5) drying, calendaring and cooling: continuously feeding the polyester fiber plate body sprayed with the flame retardant into a drying device and a flatting mill, drying and then heating to enable China hemp fibers and low-melting-point polyester fibers in the polyester fiber plate body to be co-melted and mixed, adhering and reinforcing the China hemp fibers and the low-melting-point polyester fibers, solidifying the flame retardant on the fibers of the polyester fiber plate body, and finally cooling and forming the polyester fiber plate through a cooling roller;
(6) and cutting and finishing: and cutting the polyester fiber board according to the required size, and finishing and warehousing.
5. The production process of polyester fiber board based on hemp straw waste material as claimed in claim 4, wherein the production process comprises the following steps: and (4) uniformly spraying the flame retardant along the width of the polyester fiber plate body on the upper surface of the polyester fiber plate body, enabling the flame retardant to penetrate into the polyester fiber plate body from the lower surface of the polyester fiber plate body, wherein the penetrating thickness is half of the thickness of the polyester fiber plate body, and enabling the flame retardant to soak the polyester fiber plate body from outside to inside.
6. The production process of polyester fiber board based on hemp straw waste material as claimed in claim 4, wherein the production process comprises the following steps: the drying temperature in the step (5) is 150-.
7. The production process of polyester fiber board based on hemp straw waste material as claimed in claim 6, wherein the production process comprises the following steps: and (5) the drying equipment comprises a first section of drying box and a second section of drying box, and the liquid waiting rate of the polyester fiber plate body dried by the first section of drying box is 10%.
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Application publication date: 20200811 |