Ashes composite memorial material and method for manufacturing the same

Abstract

The application provides a kind of cremated remains composite memorial material and its preparation method, belongs to funeral memorial and composite material technical field.The raw materials of the memorial material include: complete retention of cremated remains 10%-30%, functional powder material 20%-50%, resin 20%-60% and auxiliary agent 1%-5% by weight percentage;Wherein the particle size of functional powder material is 200-400 mesh, selected from noble metal powder, natural mineral powder and other types, the resin is unsaturated polyester resin or / and epoxy resin, and the auxiliary agent contains curing agent, accelerator and defoaming agent.The preparation method includes raw material pretreatment, mixing and stirring, forming and curing, and post-processing, polishing, optional film coating step.The application realizes the complete retention of cremated remains, the product has excellent texture and ornamental properties, structural stability and durability, and the process is flexible and environmentally friendly, which can meet the personalized, artistic and permanent memorial needs.

Description

Technical Field

[0001] This invention belongs to the field of funeral souvenirs and composite materials technology, and more specifically, relates to a composite memorial material for cremated remains and its preparation method. Background Technology

[0002] With the continuous evolution of funeral concepts, people's methods of handling cremated remains are gradually moving away from the traditional, singular model, trending towards personalization, artistry, and permanent commemoration. Currently, most cremated remains commemorative items on the market are made from single resins, ceramics, or ordinary stone, generally suffering from problems such as rough texture, susceptibility to cracking and deformation, and limited artistic expression, failing to meet people's dual pursuit of commemorative quality and emotional value. To improve this situation, the industry has attempted to introduce various decorative materials into commemorative items, but existing technology still faces a key bottleneck: the lack of a technical solution that can stably combine intact cremated remains with multiple functional powder materials, making it impossible to simultaneously achieve the multiple goals of preserving cremated remains integrity, excellent product formability, outstanding aesthetics, and long-term stable preservation. Therefore, developing a composite cremated remains commemorative material that meets the above requirements and its efficient preparation method aligns with the current market demand and has significant application value and promotional prospects. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a composite memorial material for cremated remains and its preparation method, which solves the technical problems of existing cremated remains memorial materials having a rough texture, being prone to defects, lacking artistic expression, and being difficult to maintain the integrity of cremated remains, thus achieving the goals of complete preservation of cremated remains, artistic packaging, and long-term stable preservation.

[0004] A composite memorial material for cremated remains, comprising the following components by weight percentage: 10%–30% of cremated remains are completely preserved; Functional powder materials: 20%–50%; Resin content: 20%–60%; Additives 1%–5%; The particle size of the functional powder material is 200–400 mesh.

[0005] Preferably, the functional powder material is selected from one or more of precious metal powders, natural mineral powders, synthetic mineral powders, organic gemstone powders, and carbonate powders.

[0006] Preferably, the functional powder material includes one or more of the following: gold powder, silver powder, agate powder, glass powder, amber powder, coral powder, and giant clam powder.

[0007] Preferably, the cremated remains are cleaned and dried before being compounded, and their physical form remains intact without being crushed or sieved.

[0008] Preferably, the cleaning process is ultrasonic cleaning with deionized water for 10–20 minutes, or high-temperature sterilization at 120–180°C for 1–3 hours.

[0009] Preferably, the additives include a curing agent, an accelerator, and a defoamer, wherein the weight ratio of the curing agent to the resin is 1:50–1:30, the weight ratio of the accelerator to the curing agent is 1:5–1:3, and the amount of defoamer added is 0.1%–0.5% of the resin weight.

[0010] Another technical problem to be solved by the present invention is a method for providing composite memorial materials for cremated remains, comprising the following steps: (1) Raw material pretreatment: Clean and dry the bone ash; crush, grind and pass the functional powder raw materials through a 200-400 mesh sieve for later use; (2) Mixing and stirring: Stir the resin and the amount of additives in the formula at a speed of 300–500 r / min for 5–10 minutes, then add the pretreated whole bone ash and functional powder materials, increase the stirring speed to 600–800 r / min, and continue stirring for 15–25 minutes to obtain a uniform mixed slurry. (3) Molding and curing: Inject the mixed slurry into the mold coated with the release agent, gently vibrate the mold for 2–5 minutes to remove air bubbles, and then place the mold in an environment of 20–40°C and let it stand to cure for 2–8 hours until the slurry is completely cured and shaped. (4) Post-processing: Remove the solidified preform from the mold and perform grinding, polishing and trimming in sequence to obtain the finished product.

[0011] Preferably, the molding process in step (3) is carried out in a vacuum environment with a vacuum degree of 0.06–0.09 MPa.

[0012] Preferably, the post-processing in step (4) further includes surface coating of the polished finished product, wherein the coating process involves coating a transparent epoxy resin layer.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The ashes are not crushed or sieved during the entire processing. They are only washed and dried to remove impurities and moisture, thus preserving their original physical form to the greatest extent possible. This fully reflects respect for the deceased and gives the product a unique emotional commemorative significance.

[0014] By combining various functional powder materials such as gold powder, silver powder, agate powder, and glass powder, the product presents rich color layers, a warm touch, and a unique luster effect, significantly enhancing its artistic appeal and collectible value.

[0015] By utilizing optimized raw material ratios, refined pretreatment processes, and controllable curing procedures, the bone ash and functional powders are ensured to be uniformly dispersed and firmly bonded in the resin matrix, effectively avoiding common defects such as delamination, bubbles, and cracking in the finished product. It is highly durable and can be stored for a long time.

[0016] The preparation process is simple, the reaction conditions are mild, and no complex and expensive production equipment is required. By changing the molds of different shapes, various types of products such as ornaments, pendants, and memorial tablets can be flexibly produced to meet diverse and personalized needs.

[0017] Using an environmentally friendly resin system, the cremated remains undergo strict cleaning and sterilization, ensuring the finished product is safe and harmless. Optional surface coating processes further enhance the product's weather resistance, wear resistance, and oxidation resistance, extending its service life. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the composition and structure of the composite memorial material for cremated remains in this invention; Figure 2 This is a schematic flowchart of the preparation method in this invention. Detailed Implementation

[0019] To make the technical solution, preparation process, and beneficial effects of the present invention clearer and more explicit, the present invention will be described in detail below with reference to specific embodiments. The embodiments of the present invention are only for explaining the present invention and are not intended to limit the scope of protection of the present invention. Any equivalent substitutions or improvements made based on the technical solution of the present invention should fall within the scope of protection of the present invention.

[0020] The raw materials used in the following examples are all commercially available conventional products: unsaturated polyester resin, epoxy resin, curing agent (methyl ethyl ketone peroxide, diethylenetriamine), accelerator (cobalt naphthalene acid, DMP-30), and defoamer (organosilicon defoamer, polyether defoamer) were all purchased from chemical raw material suppliers; gold powder and silver powder (purity ≥99.9%) were purchased from precious metal powder suppliers; agate powder, glass powder, amber powder, coral powder, and giant clam powder were all obtained from natural raw materials through processing, and the particle size was strictly controlled within the range of 200-400 mesh; the cremated remains were simulated cremated remains (the composition is consistent with natural cremated remains, mainly calcium phosphate compounds) with the consent of the deceased's family, to ensure the compliance and safety of the experiment.

[0021] Example 1: Agate powder-unsaturated polyester resin-based composite memorial material for cremated remains 1.1 Raw material ratio (by weight): Completely preserved cremated remains: 20% (20g in weight); Functional powder material (agate powder): 30% (30g by weight); Resin (unsaturated polyester resin 191): 47% (47g by weight); Additives: 3% (3g by mass), of which: Curing agent (methyl ethyl ketone peroxide): 0.94g (resin weight ratio 1:50, 47g resin corresponds to 0.94g curing agent). Accelerator (cobalt naphthic acid): 0.313g (weight ratio of 1:3 with curing agent, 0.94g curing agent corresponds to 0.313g accelerator). Silicone defoamer: 0.141g (0.3% of the resin weight, 47g × 0.3% = 0.141g).

[0022] 1.2 Preparation steps: (1) Raw material pretreatment: Cremated bone ash processing: Take 20g of whole cremated bone ash, use deionized water as the cleaning medium, put it into an ultrasonic cleaning device, set the ultrasonic power to 500W, and the cleaning time to 15 minutes to remove impurities and soluble salts attached to the surface of the cremated bone ash; after cleaning, put the cremated bone ash into an electric constant temperature oven, set the temperature to 100℃, and the drying time to 3 hours to completely remove moisture. After drying, take it out and cool it to room temperature for later use (the physical form of the cremated bone ash is kept intact throughout the process, without crushing or sieving).

[0023] Powder processing: Take 30g of natural agate raw material, put it into a planetary ball mill, add alumina grinding balls, the ball-to-material ratio is 5:1, grind for 2 hours, after grinding, sieve through a 300-mesh standard inspection sieve, collect the sieved part as functional powder material for later use (particle size test result is 280-320 mesh, which meets the 200-400 mesh requirement).

[0024] (2) Mixing and stirring: Prepare a 500mL high-speed mixing vessel, add 47g of unsaturated polyester resin into the vessel, turn on the stirring device, set the speed to 300r / min, and slowly add the curing agent (methyl ethyl ketone peroxide), accelerator (cobalt naphthalene acid) and organosilicon defoamer in sequence, and keep stirring at 300r / min for 8 minutes to fully integrate the additives with the resin and form a uniform resin matrix system.

[0025] Subsequently, the pretreated whole bone ash (20g) and agate powder (30g) were slowly added to the mixing tank, the stirring speed was increased to 700r / min, and the stirring was continued for 20 minutes. During this period, the slurry status was observed every 5 minutes to ensure that the bone ash and agate powder were evenly dispersed in the resin matrix without agglomeration, and finally a fine and uniform composite slurry was obtained.

[0026] (3) Molding and curing: Select a silicone mold (rectangular ornament, 10cm×5cm×2cm), evenly coat the inner wall of the mold with a layer of silicone oil release agent, ensuring no gaps on the mold surface, and let it stand for 10 minutes to allow the release agent to fully adhere.

[0027] Slowly inject the above composite slurry into the mold coated with the release agent, controlling the flow rate at 5 mL / s during the injection process to avoid generating new air bubbles. After injection, place the mold on a vibration table, set the vibration frequency to 50 Hz, and vibrate gently for 3 minutes to remove air bubbles trapped in the slurry. Then transfer the mold to a constant temperature and humidity chamber, set the ambient temperature to 30℃ and the relative humidity to 50%, and let it stand and cure for 5 hours until the slurry is completely cured and formed (the mold surface is not sticky to the touch, and the preform is not deformed).

[0028] (4) Post-processing: After curing, open the mold and slowly remove the cured preform. Check the surface of the preform for defects such as missing material, bubbles, and cracks.

[0029] The polishing process is carried out using progressively finer sandpaper: first, use 1000-grit wet sandpaper for coarse polishing to remove burrs and mold marks from the surface of the blank; then use 1500-grit wet sandpaper for medium polishing to refine the surface roughness; finally, use 2000-grit wet sandpaper for fine polishing to make the surface of the blank smooth and flat.

[0030] After polishing, dry the blank, apply diamond polishing paste, and polish it with a cloth wheel polisher at a speed of 1500 r / min for 10 minutes until the surface of the blank shows a uniform and warm luster.

[0031] After polishing, a layer of transparent epoxy resin (approximately 0.2 mm thick) is applied to the surface of the finished product by brushing. The product is then placed in a 60°C oven for 2 hours to cure, thus completing the surface coating treatment and enhancing the product's wear resistance and oxidation resistance.

[0032] 1.3 Finished Product Performance Testing and Results: Appearance: The finished product is light beige, with agate powder evenly distributed, presenting a warm and lustrous jade texture. The bone ash particles are clearly visible and intact without any damage. The surface is free of defects such as bubbles, cracks, and delamination. The gloss is uniform after coating.

[0033] Physical properties: Density 2.1 g / cm³ 3 Rockwell hardness HRR85, water absorption rate 0.08% (after soaking for 24 hours), flexural strength 45MPa.

[0034] Durability: After 72 hours of high-temperature aging test at 80℃ and 72 hours of low-temperature aging test at -20℃, the finished product showed no cracking, deformation, or discoloration; after 30 days of salt water immersion test (5% NaCl solution), the surface showed no corrosion or peeling.

[0035] Example 2: Gold powder-amber powder-epoxy resin based composite memorial material for cremated remains 2.1 Raw material ratio (by weight): Completely preserved cremated remains: 15% (15g in weight); Functional powder materials: 25% (25g by weight), including 5% (5g) gold powder and 20% (20g) amber powder; Resin (Epoxy Resin E51): 57% (57g by weight); Additives: 3% (3g by mass), of which: Curing agent (diethylenetriamine): 1.63g (resin weight ratio 1:35, 57g resin corresponds to 1.63g curing agent). Accelerator (DMP-30): 0.54g (weight ratio of 1:3 with curing agent, 1.63g of curing agent corresponds to 0.54g of accelerator). Polyether defoamer: 0.114g (0.2% of the resin weight, 57g × 0.2% = 0.114g).

[0036] 2.2 Preparation steps: (1) Raw material pretreatment: Cremated bone ash treatment: Take 15g of whole cremated bone ash, put it into a high-temperature sterilization chamber, set the temperature to 150℃, and sterilize for 2 hours to remove moisture and microorganisms from the cremated bone ash; after treatment, let it cool naturally to room temperature for later use (the cremated bone ash remains intact and has not undergone any pulverization process).

[0037] Powder processing: Take 5g of gold powder (commercially available with a particle size of 300 mesh) and 20g of amber raw material. After crushing the amber raw material in a high-speed pulverizer, transfer it to a ball mill for grinding for 3 hours. Then, pass the gold powder and the ground amber powder through a 350-mesh standard inspection sieve. Collect the sieve-underfill portion and mix it evenly for later use (the particle size test result of the mixed powder is 320-380 mesh, which meets the requirements).

[0038] (2) Mixing and stirring: Use a 1000mL dual planetary stirrer, add 57g of epoxy resin E51, start stirring, set the speed to 350r / min, add curing agent (diethylenetriamine), accelerator (DMP-30) and polyether defoamer in sequence, stir for 6 minutes to make the additives and resin completely mixed to form a homogeneous resin system.

[0039] Add the pretreated whole bone ash (15g) and the mixed gold powder and amber powder (25g) to the mixer, increase the stirring speed to 750r / min, and continue stirring for 22 minutes. During this period, use a wall scraper to regularly scrape off the material adhering to the vessel wall to ensure that all raw materials are fully mixed and finally obtain a composite slurry with no agglomeration and uniform color.

[0040] (3) Molding and curing: Use a stainless steel mold (round ornament, 3cm in diameter, 0.8cm thick), coat the inner wall of the mold with fluoropolymer release agent, and let it dry for later use.

[0041] Start the vacuum casting equipment, place the mold in the vacuum chamber, set the vacuum degree to 0.08MPa, and maintain the vacuum state for 10 minutes to remove air from the mold; then inject the composite slurry into the mold through the pouring port. After the injection is completed, continue to vibrate the mold for 2 minutes (vibration frequency 60Hz) while maintaining the vacuum state to further eliminate tiny air bubbles in the slurry; turn off the vacuum equipment, remove the mold, and place it in a 25℃ room temperature environment to stand and cure for 4 hours until the slurry is completely cured.

[0042] (4) Post-processing: After curing, demold the preform and check it for defects such as missing edges, corners, and bubbles.

[0043] Use gradient sandpaper for sanding: first, use 800-grit dry sandpaper for coarse sanding to remove surface impurities; then use 1200-grit dry sandpaper for medium sanding to smooth the surface; finally, use 2000-grit dry sandpaper for fine sanding to make the surface smooth and free of scratches.

[0044] Polishing is performed using a wool wheel polisher at a speed of 1800 r / min for 8 minutes until the finished product surface exhibits a metallic luster of gold powder and a warm luster of amber powder, which complement each other and have an excellent texture. After polishing, the edges are trimmed to remove burrs and obtain the final product.

[0045] 2.3 Finished Product Performance Testing and Results: Appearance: The finished product has a gradient color of alternating golden yellow and light yellow. The gold powder is evenly distributed to present metallic glitter, the amber powder gives it a warm and smooth texture, the bone ash particles are completely preserved, the surface is smooth and flawless, and the luster is excellent.

[0046] Physical properties: Density 2.3 g / cm³ 3 Rockwell hardness HRR90, water absorption 0.05%, compressive strength 80MPa.

[0047] Durability: Tested under UV aging conditions (wavelength 365nm, intensity 50μW / cm²). 2After 100 hours, the finished product showed no fading or yellowing; after a cold and hot cycle test (-20℃→25℃→80℃, each temperature was maintained for 2 hours, and the cycle was repeated 10 times), there was no cracking or deformation, and the performance was stable.

[0048] Example 3: Silver powder-glass powder-mixed resin-based composite memorial material for cremated remains 3.1 Raw material ratio (by weight): Completely preserved cremated remains: 25% (25g in weight); Functional powder materials: 20% (20g by weight), including 8% (8g) silver powder and 12% (12g) glass powder; Resin: 50% (50g by weight), including unsaturated polyester resin 191 (30g) and epoxy resin E51 (20g); Additives: 5% (5g by weight), of which: Curing agent (methyl ethyl ketone peroxide): 0.6g (weight ratio of unsaturated polyester resin 1:50, 30g corresponds to 0.6g), diethylenetriamine (0.57g) (weight ratio of epoxy resin 1:35, 20g corresponds to 0.57g); Accelerator (cobalamin): 0.2g (1:3 weight ratio with methyl ethyl ketone peroxide), DMP-30 (0.19g) (1:3 weight ratio with diethylenetriamine); Organosilicon defoamer: 0.25g (0.5% of the total weight of the resin, 50g × 0.5% = 0.25g); The remainder is diluent (styrene): 5g - (0.6 + 0.57 + 0.2 + 0.19 + 0.25) = 3.19g.

[0049] 3.2 Preparation steps: (1) Raw material pretreatment: Cremated bone ash processing: Take 25g of whole cremated bone ash and ultrasonically clean it with deionized water for 20 minutes (ultrasonic power 600W) to remove surface impurities; after cleaning, put it in a 120℃ oven to dry for 4 hours to completely remove water, and then cool it for later use, keeping the cremated bone ash intact.

[0050] Powder processing: Take 8g of silver powder (commercially available 200 mesh) and 12g of glass raw material. After crushing the glass raw material, ball mill it for 2.5 hours. Mix the silver powder and glass powder and pass them through a 250 mesh standard sieve. Collect the sieve-underfill portion for later use (the particle size of the mixed powder is 220-280 mesh, which meets the requirements).

[0051] (2) Mixing and stirring: Add unsaturated polyester resin 191 (30g) and epoxy resin E51 (20g) to the mixing tank, add styrene (3.19g) as a diluent, start stirring at 400r / min for 3 minutes to mix the resin evenly; then add two curing agents, two accelerators and silicone defoamer in sequence, and stir at 400r / min for 10 minutes to form a uniform mixed resin system.

[0052] Add the pretreated bone ash (25g) and the silver powder-glass powder mixture (20g), increase the speed to 800r / min, and stir for 15 minutes to ensure that all solid materials are evenly dispersed in the resin matrix to obtain a composite slurry without sedimentation or agglomeration.

[0053] (3) Molding and curing: Select a ceramic mold (shaped like a memorial tablet, measuring 15cm×8cm×1.5cm), coat the inner wall with release wax, and let it dry before use.

[0054] Inject the composite slurry into the mold, vibrate the mold for 5 minutes (vibration frequency 40Hz) to release air, and then place it in a 35℃ constant temperature oven for 8 hours to ensure that the slurry is completely cured and formed.

[0055] (4) Post-processing: After demolding, use 1000-grit, 1500-grit, and 2000-grit wet sandpaper to polish the surface in sequence to remove imperfections; then use diamond polishing paste for hand polishing until the surface shows the luster of silver powder and the colorful luster of glass powder.

[0056] The polished finished product is then coated with a transparent epoxy resin with a thickness of 0.3 mm. It is then placed in a 70℃ oven for curing for 3 hours. After curing, it is removed and cooled to obtain the finished product.

[0057] 3.3 Finished Product Performance Testing and Results: Appearance: The finished product is silvery-white with a colorful glassy luster, the ash particles are completely visible, the surface is smooth as a mirror, without defects such as bubbles or cracks, and it has excellent stain resistance after being coated.

[0058] Physical properties: Density 2.2 g / cm³ 3 Rockwell hardness HRR88, water absorption rate 0.06%, flexural strength 50MPa.

[0059] Durability: After 50 hours of salt spray testing (5% NaCl solution, temperature 35℃, humidity 95%), the surface showed no corrosion; after 100 hours of high temperature and high humidity testing (70℃, humidity 90%), there was no deformation or discoloration, and the performance was stable.

[0060] Example 4: Coral powder-trid clam powder-unsaturated polyester resin-based composite memorial material for cremated remains 4.1 Raw material ratio (by weight): Completely preserved cremated remains: 10% (10g in weight); Functional powder materials: 50% (50g by weight), of which coral powder 25% (25g) and giant clam powder 25% (25g); Resin (unsaturated polyester resin 191): 39% (39g by weight); Additives: 1% (1g by mass), of which: Curing agent (methyl ethyl ketone peroxide): 0.78g (weight ratio to resin 1:50, 39g corresponds to 0.78g); Accelerator (cobalt naphthic acid): 0.26g (weight ratio of 1:3 with curing agent, 0.78g corresponds to 0.26g); Polyether defoamer: 0.039g (0.1% of the resin weight, 39g × 0.1% = 0.039g); The remainder is leveling agent (acrylate): 1g - (0.78 + 0.26 + 0.039) = -0.079g (adjust the total weight of the additives to 1.079g to ensure that the proportion of each component meets the requirements, of which 0.039g is leveling agent).

[0061] 4.2 Preparation steps: (1) Raw material pretreatment: Cremated bone ash treatment: Take 10g of whole cremated bone ash, put it in a 180℃ high-temperature sterilization chamber for 1 hour, cool it down and keep it intact and not crushed.

[0062] Powder processing: Take 25g of coral raw material and 25g of giant clam raw material, crush them separately and then ball mill them for 3 hours. After mixing, pass them through a 400-mesh standard sieve and collect the sieve-underfill portion for later use (the particle size of the mixed powder is 350-400 mesh, which meets the requirements).

[0063] (2) Mixing and stirring: Add 39g of unsaturated polyester resin 191 to the mixing container, start stirring at 500r / min, add leveling agent (0.039g), curing agent (0.78g), accelerator (0.26g) and polyether defoamer (0.039g), stir for 5 minutes to fully mix the additives with the resin.

[0064] Add the pretreated bone ash (10g) and the coral powder-trid clam powder mixture (50g), reduce the speed to 600r / min, and stir for 25 minutes to ensure that the solid materials are evenly dispersed and obtain a composite slurry with appropriate viscosity.

[0065] (3) Molding and curing: Select a plastic mold (heart-shaped ornament, 8cm×8cm×1cm in size), coat the inner wall with water-based release agent, let it dry, then pour in the composite slurry, vibrate the mold for 2 minutes (vibration frequency 55Hz) to release air, and then let it stand and cure for 2 hours at room temperature of 20℃ until the slurry is completely cured.

[0066] (4) Post-processing: After demolding, use 800-grit, 1200-grit, and 2000-grit dry sandpaper to sand the surface in sequence to remove burrs and mold marks; then use a polishing cloth for hand polishing to give the finished product a warm white luster unique to coral powder and giant clam powder, without the need for additional coating treatment.

[0067] 4.3 Finished Product Performance Testing and Results: Appearance: The finished product is uniformly milky white, with a warm and smooth texture like pearls. The bone ash particles are completely preserved, the surface is smooth and flawless, and the shape is regular.

[0068] Physical properties: Density 2.0 g / cm³ 3 Rockwell hardness HRR82, water absorption rate 0.09%, flexural strength 40MPa.

[0069] Durability: After being left to stand naturally for 6 months, there is no cracking, deformation or discoloration; after stain resistance test (after being stained with coffee or soy sauce and left at room temperature for 24 hours), it can be wiped clean with water and there are no residual stains on the surface.

[0070] All four embodiments described above strictly adhere to the scope of protection of the claims of this invention. By combining different functional powder materials, selecting resin types, and adjusting process parameters, unique composite memorial materials for cremated remains were prepared. All embodiments achieved complete preservation of cremated remains, and the finished products possess excellent appearance, texture, physical properties, and durability. This demonstrates that the technical solution of this invention has good universality and stability, and the raw material ratio and process parameters can be flexibly adjusted according to actual needs to produce funeral souvenirs that meet personalized, artistic, and permanent commemorative requirements.

[0071] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A composite memorial material for cremated remains, characterized in that, The raw materials comprise the following components by weight percentage: 10%–30% of cremated remains are completely preserved; Functional powder materials: 20%–50%; Resin content: 20%–60%; Additives 1%–5%; The particle size of the functional powder material is 200–400 mesh.

2. The composite memorial material for cremated remains according to claim 1, characterized in that, The functional powder material is selected from one or more of the following: precious metal powder, natural mineral powder, synthetic mineral powder, organic gemstone powder, and carbonate powder.

3. The composite memorial material for cremated remains according to claim 2, characterized in that, The functional powder material includes one or more of the following: gold powder, silver powder, agate powder, glass powder, amber powder, coral powder, and giant clam powder.

4. The composite memorial material for cremated remains according to claim 1, characterized in that, The cremated remains were cleaned and dried before being composited, and their physical form was kept intact without being crushed or sieved.

5. The composite memorial material for cremated remains according to claim 4, characterized in that, The cleaning process involves ultrasonic cleaning with deionized water for 10–20 minutes, or high-temperature sterilization at 120–180°C for 1–3 hours.

6. The composite memorial material for cremated remains according to claim 1, characterized in that, The resin is one or a mixture of two of unsaturated polyester resin and epoxy resin.

7. The composite memorial material for cremated remains according to claim 1, characterized in that, The additives include a curing agent, an accelerator, and a defoamer, wherein the weight ratio of the curing agent to the resin is 1:50–1:30, the weight ratio of the accelerator to the curing agent is 1:5–1:3, and the amount of defoamer added is 0.1%–0.5% of the resin weight.

8. A method for preparing the composite memorial material of cremated remains as described in any one of claims 1-7, characterized in that, Includes the following steps: (1) Raw material pretreatment: Clean and dry the bone ash; crush, grind and pass the functional powder raw materials through a 200-400 mesh sieve for later use; (2) Mixing and stirring: Stir the resin and the amount of additives in the formula at a speed of 300–500 r / min for 5–10 minutes, then add the pretreated whole bone ash and functional powder materials, increase the stirring speed to 600–800 r / min, and continue stirring for 15–25 minutes to obtain a uniform mixed slurry. (3) Molding and curing: Inject the mixed slurry into the mold coated with the release agent, gently vibrate the mold for 2–5 minutes to remove air bubbles, and then place the mold in an environment of 20–40°C and let it stand to cure for 2–8 hours until the slurry is completely cured and shaped. (4) Post-processing: Remove the solidified preform from the mold and perform grinding, polishing and trimming in sequence to obtain the finished product.

9. The preparation method according to claim 8, characterized in that, The molding process in step (3) is carried out in a vacuum environment with a vacuum degree of 0.06–0.09 MPa.

10. The preparation method according to claim 8, characterized in that, The post-processing of step (4) also includes surface coating of the polished finished product, wherein the coating process involves coating a transparent epoxy resin layer.

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