EP4711111A1

EP4711111A1 - Processing process of toile lid containing coconut shells and wood flour

Info

Publication number: EP4711111A1
Application number: EP24200260.8A
Authority: EP
Inventors: Xiaofeng Xu
Original assignee: Zhejiang Hengyuan Sanitary Ware Co Ltd
Current assignee: Zhejiang Hengyuan Sanitary Ware Co Ltd
Priority date: 2024-09-13
Filing date: 2024-09-13
Publication date: 2026-03-18

Abstract

The present disclosure discloses a processing process of a toilet lid containing coconut shells and wood flour, aiming to provide a processing process of a high-toughness high-resistance toilet lid formed by combination of coconut shells, wood flour, glass fibers or carbon fibers, a water-proofing agent and urea formaldehyde glue, through multiple screening and grinding and through addition of combined fiber materials. The key of the technical solution is that the coconut shells, the wood flour, the glass fibers or carbon fibers, the water-proofing agent and the urea formaldehyde glue are used, wherein the use of the coconut shells is intended to increase the rational utilization of resources, and the coconut shells are degradable materials. Furthermore, the addition of the fiber materials allows a mixed slurry formed by the coconut shells and the wood flour to have a binding strength brought by the fiber materials.

Description

TECHNICAL FIELD

The present disclosure relates to the technical field of toilet lid production, more particularly to a processing process of a toilet lid containing coconut shells and wood flour.

BACKGROUND

In today's life, toilets in bathrooms are gradually replacing traditional squatting toilets due to their conveniences and aesthetics, as well as the convenience of people with limited mobility (pregnant women, elderly people, people with limited limbs, etc.), and are widely used.
Furthermore, the current toilets are mostly made of plastics, but toilet lids made of plastics have the problems of difficult degradation, environmental pollution and the like; in response to this, wood plastic composites are gradually emerging on the market, which are composites prepared by mixing wood materials (such as wood chips, shavings, bamboo chips, wheat straw and bran, coconut shells, sugarcane bagasse, peanut shells and hemp) as a main raw material with plastics (such as PE, PP, PVC, PS and ABS). However, the added plastics and other plastic components reduce processing performance, mechanical properties and durability of composites.
Furthermore, it is found during the research and development that if a mixed material of wood materials and glue is only used, its strength mainly depends on the binding strength of glue, and the particularity of glue takes a crucial effect. However, it can increase the entire production cost, is poor in practicability, is strong in limitation and is not beneficial to large-scale production. Therefore, the present disclosure provides a processing process of a toilet lid containing coconut shells and wood flour, which does not need glue with special components, can be produced on large scale, and has good compression resistance effect, good water-proof effect.

SUMMARY

In view of the defects in the prior art, the objective of the present disclosure is to provide a processing process of a high-toughness high-resistance toilet lid formed by combination of coconut shells, wood flour, glass fibers or carbon fibers, a water-proofing agent and urea formaldehyde glue, through multiple screening and grinding and through addition of combined fiber materials.
In order to achieve the above objective, the present disclosure provides the following technical solution: a processing process of a toilet lid containing coconut shells and wood flour, wherein the toilet lid is molded by hot pressing of a mixed material, and the mixed material specifically consists of the following components in parts by weight:

80-150 parts of coconut shells;
0-150 parts of wood flour;
0-30 parts of bamboo fibers or glass fibers or carbon fibers;
8-10 parts of water-proofing agent;
21-50 parts of urea formaldehyde glue,
the processing process specifically comprises the following steps: S1, preparation: 80-150 parts of coconut shells; 0-150 parts of wood flour; 0-30 parts of bamboo fibers or glass fibers or carbon fibers; 8-10 parts of water-proofing agent; 21-50 parts of urea formaldehyde glue;
S2, adding the coconut shells as a raw material into a grinding machine, pouring clear water in the grinding machine and then adjusting the smashing rotation speed of the grinding machine to 200- 600 r/min, wherein a mass ratio of the clear water to the raw material is 2:3-4:5, and the time is 10-15 min;
S3, injecting ozone into the grinding machine during the smashing of the grinding machine for sterilization to obtain wet coconut shell powders for later use;
S4, pouring the wood flour into the grinding machine to be mixed with the wet coconut shell powders and preliminarily drying the above mixture, performing preliminary screening after uniform mixing, and then grinding the screened material again to obtain mixed powders;
S5, drying the mixed powders obtained after screening in step S4 until the moisture content of the powders is less than 95%;
S6, delivering the dried powders from the grinding machine into a stirring machine through a pipeline, cutting the bamboo fibers or glass fibers or carbon fibers into short fibers with a length of 2 mm-3 mm, and mixing the cut short fibers into the mixed powders, and adjusting the stirring rotation speed of the stirring machine to 100-150 r/min;
S7, then putting the water-proof agent into the stirring machine, mixing and stirring for 5- 7 min to obtain a mixed material;
S8, adding the urea formaldehyde glue into the mixed material in step S7 according to weight parts while stirring so as to obtain the mixed material after the completion of addition;
S9, quantitatively delivering the mixed material into a cold mold of a molding machine through a pipeline, evacuating the water vapor of the mixed material inside the cold mold in a low-temperature and low-pressure environment, and then closing the mold for preliminary extrusion molding to obtain a blank;
S10, performing hot press molding on the blank obtained in step S9 according to the shape of the mold at the hot press temperature of 150°C-200°C under the pressure of 1000 N-5000 N for 10 min-20 min to obtain a toilet lid crude product;
S11, polishing the toilet lid crude product obtained after hot press molding in step S10 followed by painting to prepare a toilet lid finished product, wherein the painting pressure is 8-12 bar, and the painting adopts surface protective paint.

Provided is a processing process of a toilet lid containing coconut shells and wood flour, wherein the toilet lid is molded by hot pressing of a mixed material, and the mixed material specifically consists of the following components in parts by weight:

80-150 parts of coconut shells;
80-150 parts of wood flour;
10-30 parts of bamboo fibers or glass fibers or carbon fibers;
8-10 parts of water-proofing agent;
21-50 parts of urea formaldehyde glue,
the processing process specifically comprises the following steps: S1, preparation: 80-150 parts of coconut shells; 80-150 parts of wood flour; 10-30 parts of bamboo fibers or glass fibers or carbon fibers; 8-10 parts of water-proofing agent; 21-50 parts of urea formaldehyde glue;
S2, adding the coconut shells as a raw material into a grinding machine, pouring clear water in the grinding machine and then adjusting the smashing rotation speed of the grinding machine to 200- 600 r/min, wherein a mass ratio of the clear water to the raw material is 2:3-4:5, and the time is 4-10 min;
S3, injecting ozone into the grinding machine during the smashing of the grinding machine for sterilization to obtain wet coconut shell powders for later use;
S4, pouring the wood flour into the grinding machine to be mixed with the wet coconut shell powders and preliminarily drying the above mixture, performing preliminary screening after uniform mixing, and then grinding the screened material again to obtain mixed powders;
S5, drying the mixed powders obtained after screening in step S4 until the moisture content of the powders is less than 95%, dividing the dried powders into two parts, mixing 80% of the powders as a part that is mixed with the fiber material, and retaining remaining 20% powders for later use;
S6, delivering 80% of dried powders from the grinding machine to a stirring machine through a pipeline, cutting the bamboo fibers or glass fibers or carbon fibers into short fibers with a length of 2 mm-3 mm, and mixing the cut short fibers into the mixed powders, and adjusting the stirring rotation speed of the stirring machine to 100-150 r/min;
S7, then putting the water-proof agent into the stirring machine, mixing and stirring for 5- 7 min to obtain a mixed material;
S8, adding the urea formaldehyde glue into the mixed material in step S7 according to weight parts while stirring so as to obtain the mixed material after the completion of addition;
S9, quantitatively delivering the mixed material into a cold mold of a molding machine through a pipeline, evacuating the water vapor of the mixed material inside the cold mold in a low-temperature and low-pressure environment, and then closing the mold for preliminary extrusion molding to obtain a blank;
the step S9 also comprises a floated fiber treatment step, S90, putting the blank subjected to preliminary extrusion molding after closing the mold into the cold mold;
S91, delivering remaining 20% powders into the cold mold through the pipeline and making powders in a cavity uniformly adhered to the surface of the blank subjected to preliminary extrusion molding, and performing extrusion molding again by closing the mold to obtain a blank with a reduced fiber floating rate;
S10, performing hot press molding on the blank obtained in step S91 according to the shape of the mold at the hot press temperature of 150°C-200°C at the pressure of 1000 N-5000 N for 10 min-20 min to obtain a toilet lid crude product;
S11, polishing the toilet lid crude product obtained after hot press molding in step S10 followed by painting to prepare a toilet lid finished product, wherein the painting pressure is 8-12 bar, and the painting adopts surface protective paint.

Further, the processing process of the present disclosure also comprises a performance detection method, wherein performance testing comprises temperature testing and pressure testing, the temperature testing specifically comprises the following step: S12, putting a product into a thermostatic box, and setting high and low temperature environments, wherein the high temperature environment is set as being maintained in a high temperature environment of 70°C with an environment humidity of 95%; the low temperature environment is set as being maintained in a low temperature environment of -20°C with an environment humidity of 0%;

S13, placing the product in the high temperature environment for the duration of 3 h; after 3h is ended, placing the product in the low temperature environment for the duration of 3 h, and performing high/low temperature cycle testing on the product for 5 times in total; and
S14, observing whether or not the product is deformed or cracked.

Further, the testing conditions for pressure testing are as follows: the product is placed under a pressure testing machine and the pressure is applied to the product, and the pressure is maintained between 1750 N and 3500 N, the duration is 10 min-30 min, and the product is not deformed or cracked.
Provided is a toilet lid produced by using the processing process of the above toilet lid containing coconut shells and wood flour.
Through the adoption of the above technical solution, the present disclosure has the following beneficial effects: 1, in the present disclosure, the coconut shells, the wood flour, the glass fibers or carbon fibers, the water-proofing agent and the urea formaldehyde glue are used, the selection of the coconut shells is to increase the rational utilization of resources, and the coconut shells are degradable materials. Furthermore, the addition of the fiber materials allows a mixed slurry formed by the coconut shells and the wood flour to have a binding strength brought by the fiber materials. Moreover, after hot press molding, the overall strength of the toilet lid can be enhanced and the high roughness is formed, thereby significantly increasing the compression resistance effect and improving the stability.
2. In the overall processing process of the present disclosure, the mixed powders with a smaller particle size are obtained through multiple grinding and screening, and the short fibers of the glass fibers and carbon fibers are mixed and the humidity of the mixed powders is reduced by drying, and the agglomeration phenomenon of the mixed powders caused by excessive humidity is avoided, the addition of the water-proof agent can increase the water-proof effect on the toilet lid, and meanwhile due to a relatively great water content of the powders, the blister or moldy phenomenon, appeared after the toilet lid is used, is greatly reduced through the added water-proofing agent.
3. Moreover, different treatment processes for the bamboo fibers or glass fibers or carbon fibers are also adopted in the present disclosure, the toilet lid blank is wrapped first before being subjected to the hot press molding, allowing the above fibers to be affixed to the toilet lid after hot press, and finally the fibers are subjected to hidden processing by painting, such that the overall bonding strength is higher and the practicality is greatly improved.

DETAILED DESCRIPTION OF THE EMBODIMENTS

For ease of description, spatial relative terms such as "upper", "lower", "left", "right" and the like used in embodiments are used to describe the relationship of one element or feature relative to another element or feature shown in the drawings. It is understood that, in addition to the orientation shown in the drawings, the spatial terms are intended to include different orientations of the device during use or operation. For example, if the device in the drawings are inverted, it shall be described as locating the element "below" other elements or features "above" the other elements or features. Therefore, the exemplary term "below" may include both orientations of "above" and "below". The device may be located in other ways (rotating 90 degrees or located at other orientations), and the spatial relative description used herein may be explained accordingly.
Moreover, relational terms "first", "second" and the like are merely used for separating one component from another component with the same name, rather than not necessarily requiring or implying any actual relation or sequence between these components.

Example 1

A processing process of a toilet lid containing coconut shells and wood flour was provided in this example, wherein the toilet lid was molded by hot pressing of a mixed material, and the mixed material specifically consisted of the following components in parts by weight:

150 parts of coconut shells;
8 parts of water-proof agent;
21 parts of urea formaldehyde glue.

In the present disclosure, the coconut shells, the water-proofing agent and the urea formaldehyde glue were used, wherein the use of the coconut shells was intended to increase the rational utilization of resources, and the coconut shells were degradable materials, and all the raw materials in this example adopted the coconut shells, so as to greatly increase the utilization of resources. Furthermore, to avoid the cracking caused when in contact with water, an appropriate amount of water-proof agent was added to improve the overall water-proof effect. Moreover, after hot press molding, the overall strength of the toilet lid was improved and high roughness was formed, thereby greatly improving the compression resistance effect and promoting the stability.
The processing process specifically comprised the following steps: S1, preparation: 150 parts of coconut shells, 8 parts of water-proof agent and 21 parts of urea formaldehyde glue;

S2, the coconut shells as a raw material were added into a grinding machine, clear water was poured in the grinding machine and then the smashing rotation speed of the grinding machine was adjusted to 200- 600 r/min, wherein a mass ratio of the clear water to the raw material was 2:3-4:5, and the time was 4-10 min;
S3, ozone was injected into the grinding machine during the smashing of the grinding machine for sterilization to obtain wet coconut shell powders for later use;
S4, the wet coconut shell powders were preliminarily dried, preliminary screening was performed after uniformly mixing, and the screened material was ground again to obtain mixed powders;
S5, the mixed powders obtained after screening in step S4 were dried until the moisture content of the powders was less than 95%;
S6, the dried powders were delivered from the grinding machine into a stirring machine through a pipeline;
S7, a water-proof agent was then put into the stirring machine, mixed and stirred for 5-7 min to obtain a mixed material;
S8, the urea formaldehyde glue was added into the mixed material in step S7 according to weight parts while stirring so as to obtain the mixed material after the completion of addition;
S9, the mixed material was quantitatively delivered into a cold mold of a molding machine through a pipeline, the water vapor of the mixed material inside the cold mold was evacuated in a low-temperature and low-pressure environment, and then the mold was closed for preliminary extrusion molding to obtain a blank;
S10, hot press molding was performed on the blank obtained in step S9 according to the shape of the mold at the hot press temperature of 150°C-200°C under the pressure of 1000 N-5000 N for 10 min-20 min to obtain a toilet lid crude product; and
S11, the toilet lid crude product obtained after hot press molding in step S10 was polished, followed by painting to prepare a toilet lid finished product, wherein the painting pressure was 8-12 bar, and the painting adopted surface protective paint.

In the overall processing process of the present disclosure, mixed powders with a smaller particle size are obtained through multiple grinding and screening, the humidity of the mixed powders is reduced by drying, and the agglomeration phenomenon of the mixed powders caused by excessive humidity is avoided, the addition of the water-proof agent can increase the water-proof effect on the toilet lid, and meanwhile due to a relatively great water content of the powders, the blister or moldy phenomenon, appeared after the toilet lid is used, is greatly reduced through the added water-proofing agent.
Further, the present disclosure also comprised a performance detection method. The performance testing comprised temperature testing and pressure testing, the temperature testing specifically comprised the following step: S12, a product was put into a thermostatic box, and high and low temperature environments were set, wherein the high temperature environment was set as being maintained in a high temperature environment of 70°C with an environment humidity of 95%; the low temperature environment was set as being maintained in a low temperature environment of -20°C with an environment humidity of 0%;

S13, the product was placed first in the high temperature environment for the duration of 3 h; after 3 h was ended, the product was placed in the low temperature environment for the duration of 3 h, and high/low temperature cycle testing was performed on the product for 5 times in total; and
S14, whether or not the product was deformed or cracked was observed.

In the above temperature testing, to make the toilet lid adapt to various extreme environments, high and low temperatures were circulated, time control was performed, and the cycling time reached 5 times, thereby greatly improving the overall high/low temperature resistance strength and significantly prolonging the service life.
Furthermore, the pressure testing specifically comprised the following steps, and the testing conditions for pressure testing were as follows: the product was placed under a pressure testing machine and the pressure was applied to the product, and the pressure was maintained between 1750 N and 3500 N, the duration was 3 min-10 min, and the product was not deformed or cracked.
In the present disclosure, performance testing was performed on the molded toilet lid so as to improve the yield, and ensure whether or not the production effect could reach preliminary resistance and then other tests were performed. Moreover, specific tear strength, impact strength, elongation at break and waterproof performance are as shown in Table 1.

Example 2

80 parts of coconut shells;
80 parts of wood flour;
20 parts of bamboo fibers or glass fibers or carbon fibers;
8 parts of water-proof agent;
21 parts of urea formaldehyde glue.

In the present disclosure, the coconut shells, the wood flour, the bamboo fibers or glass fibers or carbon fibers, the water-proofing agent and the urea formaldehyde glue were used, wherein the use of the coconut shells was intended to increase the rational utilization of resources, and the addition of the fiber materials allowed the mixed material formed by the coconut shells and wood flour to have a binding strength brought by the fiber materials. Furthermore, after hot press molding, the overall strength of the toilet lid could be improved and the high roughness was formed, thereby greatly improving the compression resistance effect and promoting the stability.
The processing process specifically comprised the following steps: S1, preparation: 80 parts of coconut shells, 80 parts of wood flour, 20 parts of bamboo fibers or glass fibers or carbon fibers, 8 parts of water-proof agent and 21 parts of urea formaldehyde glue;

S2, the coconut shells as a raw material were added into a grinding machine, clear water was poured in the grinding machine and then the smashing rotation speed of the grinding machine was adjusted to 200- 600 r/min, wherein a mass ratio of the clear water to the raw material was 2:3-4:5, and the time was 4-10 min;
S3, ozone was injected into the grinding machine during the smashing of the grinding machine for sterilization to obtain wet coconut shell powders for later use;
S4, the wood flour was poured into the grinding machine to be mixed with the wet coconut shell powders and the above mixture was preliminarily dried, preliminary screening was performed after uniform mixing, and then the screened material was ground again to obtain mixed powders;
S5, the mixed powders obtained after screening in step S4 were dried until the moisture content of the powders was less than 95%;
S6, the dried powders was delivered from the grinding machine into a stirring machine through a pipeline, bamboo fibers or glass fibers or carbon fibers were cut into short fibers with a length of 2 mm-3 mm, and the cut short fibers were mixed into the mixed powders, and the stirring rotation speed of the stirring machine was adjusted to 100- 150 r/min;
S7, the water-proof agent was then put into the stirring machine, mixed and stirred for 5- 7 min to obtain a mixed material;
S8, the urea formaldehyde glue was added into the mixed material obtained in step S7 based on weight parts while stirring, and a further mixed material was obtained after the addition was ended;
S9, the mixed material was quantitatively delivered into a cold mold of a molding machine through a pipeline, the water vapor of the mixed material inside the cold mold was evacuated in a low-temperature and low-pressure environment, and then the mold was closed for preliminary extrusion molding to obtain a blank;
S10, hot press molding was performed on the blank obtained in step S9 according to the shape of the mold at the hot press temperature of 150°C-200°C under the pressure of 1000 N-5000 N for 10 min-20 min to obtain a toilet lid crude product;
S11, the toilet lid crude product obtained after hot press molding in step S10 was polished, followed by painting to prepare a toilet lid finished product, wherein the painting pressure was 8-12 bar, and the painting adopted surface protective paint.

In the overall processing process of the present disclosure, mixed powders with a smaller particle size are obtained through multiple grinding and screening, and the short fibers of the glass fibers and the carbon fibers are used to be mixed, and the humidity of the mixed powders is reduced by drying, and the agglomeration phenomenon of the mixed powders caused by excessive humidity is avoided, the addition of the water-proof agent can increase the water-proof effect on the toilet lid, and due to a relatively great water content of the powders, the blister or moldy phenomenon, appeared after the toilet lid is used, is greatly reduced through the added water-proofing agent.
The performance test method adopted in the present disclosure is the same as that in example 1. Performance test is performed on the molded toilet lid through the above test method so as to improve the yield and ensure whether or not the production effect can reach preliminary resistance and then other tests are performed, and specific tear strength, impact strength, elongation at break and waterproof performance are as shown in Table 1.

Example 3

110 parts of coconut shells;
110 parts of wood flour;
25 parts of bamboo fibers or glass fibers or carbon fibers;
9 parts of water-proof agent;
35 parts of urea formaldehyde glue.

The main process of this example was basically the same as that of example 1 only except that different material components were selected, and specific tear strength, impact strength, elongation at break and waterproof performance are as shown in Table 1.

Example 4

150 parts of coconut shells;
150 parts of wood flour;
30 parts of bamboo fibers or glass fibers or carbon fibers;
10 parts of water-proof agent;
50 parts of urea formaldehyde glue.

The processing process specifically comprised the following steps: S1, preparation: 150 parts of coconut shells, 150 parts of wood flour, 30 parts of bamboo fibers or glass fibers or carbon fibers, 10 parts of water-proof agent and 50 parts of urea formaldehyde glue;

S2, the coconut shells as a raw material were added into a grinding machine, clear water was poured in the grinding machine and then the smashing rotation speed of the grinding machine was adjusted to 200- 600 r/min, wherein a mass ratio of the clear water to the raw material was 2:3-4:5, and the time was 4-10 min;
S3, ozone was injected into the grinding machine during the smashing of the grinding machine for sterilization to obtain wet coconut shell powders for later use;
S4, the wood flour was poured into the grinding machine to be mixed with the wet coconut shell powders and the above mixture was preliminarily dried, preliminary screening was performed after uniform mixing, and then the screened material was ground again to obtain mixed powders;
S5, the mixed powders obtained after screening in step S4 were dried until the moisture content of the powders was less than 95%, the dried powders were divided into two parts, 80% of the powders were used as a part that was mixed with the fiber material, and remaining 20% powders were retained for later use;
S6, 80% of dried powders were delivered from the grinding machine to a stirring machine through a pipeline, the bamboo fibers or glass fibers or carbon fibers were cut into short fibers with a length of 2 mm-3 mm, and the cut short fibers were mixed into the mixed powders, and the stirring rotation speed of the stirring machine was adjusted to 100- 150 r/min;
S7, the water-proof agent was put into the stirring machine, mixed and stirred for 5-7 min to obtain a mixed material;
S8, the urea formaldehyde glue was added into the mixed material obtained in step S7 based on weight parts while stirring, and a further mixed material was obtained after the addition was ended;
S9, the mixed material was quantitatively delivered into a cold mold of a molding machine through a pipeline, the water vapor of the mixed material inside the cold mold was evacuated in a low-temperature and low-pressure environment, and then the mold was closed for preliminary extrusion molding to obtain a blank;
the step S9 also comprised a floated fiber treatment step, S90, the blank subjected to preliminary extrusion molding was put after the mold was closed into the cold mold;
S91, remaining 20% powders were mixed with the urea formaldehyde glue and then the obtained mixture was delivered into the cold mold through the pipeline and powders in a cavity were uniformly adhered to the surface of the blank subjected to preliminary extrusion molding, and extrusion molding was performed again by closing the mold was closed to obtain a blank with a reduced fiber floating rate;
S10, hot press molding was performed on the blank obtained in step S91 according to the shape of the mold at the hot press temperature of 150°C-200°C at the pressure of 1000 N-5000 N for 10 min-20 min to obtain a toilet lid crude product;
S11, the toilet lid crude product obtained after hot press molding in step S10 was polished, followed by painting to prepare a toilet lid finished product, wherein the painting pressure was 8-12 bar, and the painting adopted surface protective paint.

The process of this example is roughly the same as that of example 1 only except that in this example, different processes are used to treat the bamboo fibers or glass fibers or carbon fibers, specifically for how to reduce the fiber floating. In this example, the mixed powder formed by coconut shells and wood flour is divided into two parts, the first part is to mix with fiber materials, and the second part is that the mixed powders thereof are mixed with the urea formaldehyde glue and then continuously covered after extrusion molding after the cold mold in the first part is extruded and preliminarily molded, thus greatly reducing the situation of fiber floating, and moreover after hot press molding, the molded product is ground, and finally is subjected to the further surface treatment by painting, such that the the overall bonding strength is higher and the practicality is greatly improved, and the specific achieved tear strength, impact strength, elongation at break and waterproof performance are as shown in Table 1.

Comparative example 1

This comparative example is different from example 1 described above in that a processing process of a toilet lid containing coconut shells and wood flour, wherein the toilet lid was molded by hot pressing of a mixed material, and the mixed material comprised the following components in parts by weight:

80 parts of coconut shells;
80 parts of wood flour;
21 parts of urea formaldehyde glue.

Comparative example 2

80 parts of coconut shells;
80 parts of wood flour;
20 parts of bamboo fibers or glass fibers or carbon fibers;
21 parts of urea formaldehyde glue.

Comparative example 3

This comparative example is different from example 1 described above in that a processing process of a toilet lid containing coconut shells and wood flour, wherein the toilet lid was molded by hot pressing of a mixed material, and the mixed material comprised the following components in parts by weight:
80 parts of coconut shells;
80 parts of wood flour;
10 parts of water-proof agent
21 parts of urea formaldehyde glue,

Table 1

	Tear strength (kN/m)	Compressive strength (kN/m)	Elongation at break (%)	High temperature test (°C)	Low temperature test (°C)	Antibacterial rate (%)
Example 1	16.5	16.8	592.8	80	-24	94
Example 2	20.1	20.5	653.5	115	-40	98
Example 3	22.3	22.8	731.2	118	-45	97
Example 4	23.6	24	764.2	120	-48	97
Comparative example 1	16.4	16.5	589.4	83	-22	73
Comparative example 2	19.9	20.3	632.1	92	-36	75
Comparative example 3	16.6	16.9	571.6	80	-19	97

It can be seen from the above data that the present disclosure adopts the coconut shells as a main raw material in combination with a proper proportion of wood flour, fiber materials are added in the stage of mixing the powders, the fiber materials can be the bamboo fibers or glass fibers or carbon fibers or the like. The addition of the fiber materials can allow the urea formaldehyde glue to adhere more closely to the fiber materials with the mixed powders after hot pressing, the fiber materials similarly can improve the adhesion points of the mixed powders, make a structure between the mixed powders and the fiber materials stronger, and then the tear strength, compressive strength and elongation at break of the toilet lid are improved.
For comparative example 1, the coconut shell powders are mixed with the wood flour. Comparative example 1 is mainly different from example 1 in that the coconut shell powders are used entirely in example 1, so under the condition that the coconut shell powers are used, it can also have similar performance. Therefore, when all coconut shell powders are used, it also has a certain performance effect.
For comparative example 2, the fiber materials are added, and the fiber materials are all added in example 2, example 3 and example 4. For examples after addition, the tear strength, compressive strength and elongation at break are significantly improved, and therefore the fiber materials have significantly improved strength;
furthermore, it should be noted that in the production method of example 4, the mixed powder material is divided into two parts, the first part of the two parts is mixed with the fiber materials, the mixed material after mixing is preliminarily extruded and formed, and the second part is mixed with the urea formaldehyde glue and then mixed with the first part so as to perform adhesion on the surface again so that after hot pressing, the coating is formed, thereby reducing fiber floating while increasing the entire structure strength.
For comparative example 3, the water-proof agent is added. To ensure the entire water-proof effect of the toilet lid and then achieve the antibacterial effect, by addition of the water-proof agent and a painting mode, the entire antibacterial effect is improved, and the fiber floating problem can also be solved, and therefore practicability is greatly improved.
The above are only specific embodiments of the present disclosure, and not used to limit the present disclosure. Common change and replacement made by those skilled in the art during the scope of the technical solution of the present disclosure are all included in the protection scope of the present disclosure.

Claims

A processing process of a toilet lid containing coconut shells and wood flour, wherein the toilet lid is molded by hot pressing of a mixed material, and the mixed material specifically consists of the following components in parts by weight:
80-150 parts of coconut shells;

0-150 parts of wood flour;

0-30 parts of bamboo fibers or glass fibers or carbon fibers;

8-10 parts of water-proofing agent;

21-50 parts of urea formaldehyde glue,

the processing process specifically comprises the following steps: S1, preparation: 80-150 parts of coconut shells, 0-150 parts of wood flour, 0-30 parts of bamboo fibers or glass fibers or carbon fibers, 8-10 parts of water-proofing agent and 21-50 parts of urea formaldehyde glue;

S2, adding the coconut shells as a raw material into a grinding machine, pouring clear water in the grinding machine and then adjusting the smashing rotation speed of the grinding machine to 200- 600 r/min, wherein a mass ratio of the clear water to the raw material is 2:3-4:5, and the time is 4-10 min;

S3, injecting ozone into the grinding machine during the smashing of the grinding machine for sterilization to obtain wet coconut shell powders for later use;

S4, pouring the wood flour into the grinding machine to be mixed with the wet coconut shell powders and preliminarily drying the above mixture, performing preliminary screening after uniform mixing, and then grinding the screened material again to obtain mixed powders;

S5, drying the mixed powders obtained after screening in step S4 until the moisture content of the powders is less than 95%;

S6, delivering the dried powders from the grinding machine into a stirring machine through a pipeline, cutting the bamboo fibers or glass fibers or carbon fibers into short fibers with a length of 2 mm-3 mm, and mixing the cut short fibers into the mixed powders, and adjusting the stirring rotation speed of the stirring machine to 100- 150 r/min;

S7, then putting the water-proof agent into the stirring machine, mixing and stirring for 5-7 min to obtain a mixed material;

S8, adding the urea formaldehyde glue into the mixed material obtained in step S7 based on weight parts while stirring, and obtaining a further mixed material after the addition is ended;

S9, quantitatively delivering the mixed material into a cold mold of a molding machine through a pipeline, evacuating the water vapor of the mixed material inside the cold mold in a low-temperature and low-pressure environment, and then closing the mold for preliminary extrusion molding to obtain a blank;

S10, performing hot press molding on the blank obtained in step S9 for 10 min-20 min according to the shape of the mold at the hot press temperature of 150°C-200°C under the pressure of 1000 N-5000 N to obtain a toilet lid crude product; and

S11, polishing the toilet lid crude product obtained after hot press molding in step S10 followed by painting to prepare a toilet lid finished product, wherein the painting pressure is 8-12 bar, and the painting adopts surface protective paint.
A processing process of a toilet lid containing coconut shells and wood flour, wherein the toilet lid is molded by hot pressing of a mixed material, and the mixed material specifically consists of the following components in parts by weight:
80-150 parts of coconut shells;

80-150 parts of wood flour;

10-30 parts of bamboo fibers or glass fibers or carbon fibers;

8-10 parts of water-proofing agent;

21-50 parts of urea formaldehyde glue,

the processing process specifically comprises the following steps: S1, preparation: 80-150 parts of coconut shells; 80-150 parts of wood flour; 10-30 parts of bamboo fibers or glass fibers or carbon fibers; 8-10 parts of water-proofing agent; 21-50 parts of urea formaldehyde glue;

S2, adding the coconut shells as a raw material into a grinding machine, pouring clear water in the grinding machine and then adjusting the smashing rotation speed of the grinding machine to 200- 600 r/min, wherein a mass ratio of the clear water to the raw material is 2:3-4:5, and the time is 4-10 min;

S3, injecting ozone into the grinding machine during the smashing of the grinding machine for sterilization to obtain wet coconut shell powders for later use;

S4, pouring the wood flour into the grinding machine to be mixed with the wet coconut shell powders and preliminarily drying the above mixture, performing preliminary screening after uniform mixing, and then grinding the screened material again to obtain mixed powders;

S5, drying the mixed powders obtained after screening in step S4 until the moisture content of the powders is less than 95%, dividing the dried powders into two parts, mixing 80% of the powders as a part that is mixed with the fiber material, and retaining remaining 20% powders for later use;

S6, delivering 80% of dried powders from the grinding machine to a stirring machine through a pipeline, cutting the bamboo fibers or glass fibers or carbon fibers into short fibers with a length of 2 mm-3 mm, and mixing the cut short fibers into the mixed powders, and adjusting the stirring rotation speed of the stirring machine to 100-150 r/min;

S7, then putting the water-proof agent into the stirring machine, mixing and stirring for 5-7 min to obtain a mixed material;

S8, adding the urea formaldehyde glue into the mixed material obtained in step S7 based on weight parts while stirring, and obtaining a further mixed material after the addition is ended;

S9, quantitatively delivering the mixed material into a cold mold of a molding machine through a pipeline, evacuating the water vapor of the mixed material inside the cold mold in a low-temperature and low-pressure environment, and then closing the mold for preliminary extrusion molding to obtain a blank;

the step S9 also comprises a floated fiber treatment step, S90, putting the blank subjected to preliminary extrusion molding after closing the mold into the cold mold;

S91, mixing remaining 20% powders with the urea formaldehyde glue and then delivering the obtained mixture into the cold mold through the pipeline and making powders in a cavity uniformly adhered to the surface of the blank subjected to preliminary extrusion molding, and performing extrusion molding again by closing the mold to obtain a blank with a reduced fiber floating rate;

S 10, performing hot press molding on the blank obtained in step S91 according to the shape of the mold at the hot press temperature of 150°C-200°C at the pressure of 1000 N-5000 N for 10 min-20 min to obtain a toilet lid crude product; and

S11, polishing the toilet lid crude product obtained after hot press molding in step S10 followed by painting to prepare a toilet lid finished product, wherein the painting pressure is 8-12 bar, and the painting adopts surface protective paint.
The processing process of the toilet lid containing coconut shells and wood flour according to claim 1 or 2, further comprising a performance detection method, wherein performance testing comprises temperature testing and pressure testing, the temperature testing specifically comprises the following step: S12, putting a product into a thermostatic box, and setting high and low temperature environments, wherein the high temperature environment is set as being maintained in a high temperature environment of 70°C with an environment humidity of 95%; the low temperature environment is set as being maintained in a low temperature environment of -20°C with an environment humidity of 0%;
S13, placing the product in the high temperature environment for the duration of 3 h; after 3 h is ended, placing the product in the low temperature environment for the duration of 3 h, and performing high/low temperature cycle testing on the product for 5 times in total; and

S14, observing whether or not the product is deformed or cracked.
The processing process of the toilet lid containing coconut shells and wood flour according to claim 3, wherein the pressure testing specifically comprises the following steps, the testing conditions for pressure testing are as follows: the product is placed under a pressure testing machine and the pressure is applied to the product, and the pressure is maintained between 1750 N and 3500 N, the duration is 3 min-10 min, and the product is not deformed or cracked.
A toilet lid produced by using the processing process of the toilet lid containing coconut shells and wood flour according to claim 1 or 2.