Polystyrene foam board forming processing technology
By applying a flame-retardant coating during the molding process of polystyrene foam boards, the problems of flammability and toxic fume release of polystyrene foam boards are solved, achieving higher flame-retardant performance and health protection.
Patent Information
- Application Number
- CN202510620648.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-14
- Publication Date
- 2025-08-01
AI Technical Summary
Existing polystyrene foam boards are flammable and release toxic fumes when burned, increasing the cost of fire prevention measures and posing health risks.
In the process of molding polystyrene foam boards, a flame-retardant coating is prepared and coated, including a mixture of flame retardants, charring agents, catalysts and solvents, which form an expanded char layer through a chemical reaction to improve flame-retardant performance.
It significantly improves the flame retardancy and fire resistance of polystyrene foam boards, avoids the release of toxic fumes, and protects human health.
Smart Images
Figure CN120396404A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of foam board forming, and particularly relates to a forming and processing technology for polystyrene foam board. Background Art
[0002] Polystyrene foam board is a lightweight thermal insulation material made of polystyrene (EPS) resin, with a fine closed-cell structure, and is widely used in fields such as construction, packaging, and transportation. When used in some special places (such as near electrical equipment, cable boxes, ceiling light frames, etc.), due to its flammability and the characteristic of possibly releasing toxic fumes, additional fire protection measures are required, thus increasing the cost investment in fire protection measures. Therefore, it is necessary to improve the flame retardant performance of the foam board itself. Summary of the Invention
[0003] The purpose of the present invention is to solve the deficiencies existing in the prior art, and to provide a forming and processing technology for polystyrene foam board.
[0004] To achieve the above purpose, the present invention adopts the following technical solution: A forming and processing technology for polystyrene foam board, comprising the following steps: S1: Pre-foaming stage: Put polystyrene particles into the hopper, and send them into the foaming machine through the conveying device. In the foaming machine, heat to 70 - 80 °C, and at the same time inject steam or compressed air to generate bubbles inside the particles and make them expand. The expanded particles are transported to the curing bin for cooling and stabilization to ensure a uniform cell structure; S2: Curing stage: After the particles are cooled to room temperature in the curing bin, heat them again to the steam temperature to further stabilize the cells. After curing is completed, the particles are transported to the forming equipment for the next step of processing; S3: Compression molding stage: The molding machine heats the particles to the softening temperature and applies pressure to make them fill the mold cavity. In the mold, the particles expand due to heat and fill the mold space, and after cooling, they are solidified into a foam board. The formed foam board needs to be cooled and dried to ensure the stability of its physical properties; S4: Cutting and post-treatment: Use a cutting machine to cut the foam board into the required size and shape, prepare a flame retardant coating and coat it on the surface of the polystyrene foam board; S5: Packaging and storage: The finished foam board will be packaged and stored in the warehouse.
[0005] Preferably, the preparation of the flame retardant coating in S4 includes the following steps: S401: Mixing and grinding: Mix the flame retardant, charring agent, catalyst and solvent evenly in proportion, and then grind them in a high-speed disperser to a moderate fineness; S402: Coating and Drying: Coat the mixture on the surface of the polystyrene foam board. Control the drying temperature at 30°C - 40°C. The thickness of each coating is about 0.1 - 0.2 mm. Coat 3 - 5 times. After drying, a preliminary coating is formed. S403: Curing and Expansion: The coating undergoes a chemical reaction at high temperature. The reaction temperature is 80 - 120°C and the reaction time is 25 - 35 min. Then an expanded carbon layer is formed.
[0006] Preferably, the ratio of the flame retardant, char - forming agent, catalyst, and solvent in S401 is 4:2:1:1.
[0007] Preferably, the steam temperature in S2 is 70 - 80°C.
[0008] Preferably, the softening temperature of S3 is 180 - 200°C.
[0009] Preferably, the cooling temperature in S3 is 80 - 100°C and the cooling time is 5 - 20 min.
[0010] Preferably, the foaming machine in S1 is an intermittent foaming machine.
[0011] Preferably, the drying treatment in S3 is specifically to send the polystyrene foam board into a drying room. The temperature of the drying room is 60°C to 70°C and the drying time is 4 h.
[0012] Compared with the prior art, the advantages and positive effects of the present invention are as follows: In the present invention, by coating a flame - retardant coating on the foam board, the flame - retardant and fire - resistant properties of the polystyrene foam board can be greatly improved. Thus, when used near electrical equipment, cable boxes, and ceiling light frames, it can avoid releasing toxic fumes and affecting the physical health of surrounding personnel. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a flow chart of a forming and processing process for a polystyrene foam board proposed by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0014] In order to more clearly understand the above - mentioned objects, features, and advantages of the present invention, the present invention will be further described below with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.
[0015] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention. In addition, in the description of the present invention, the meaning of "a plurality" is two or more unless otherwise specifically defined.
[0016] Embodiment 1 Please refer to Figure 1 , the present invention provides a forming and processing technology for polystyrene foam board, including the following steps: S1: Pre-foaming stage: Put polystyrene particles into the hopper and send them into the foaming machine through the conveying device. In the foaming machine, heat them to 70 °C, and at the same time inject steam or compressed air to generate bubbles inside the particles and make them expand. The expanded particles are transported to the curing bin for cooling and stabilization to ensure a uniform cell structure; S2: Curing stage: After the particles are cooled to room temperature in the curing bin, heat them again to the steam temperature to further stabilize the cells. After curing is completed, the particles are transported to the forming equipment for the next processing step; S3: Compression molding stage: The molding machine heats the particles to the softening temperature and applies pressure to make them fill the mold cavity. In the mold, the particles expand due to heat and fill the mold space, and after cooling, they are solidified into a foam board. The formed foam board needs to be cooled and dried to ensure the stability of its physical properties; S4: Cutting and post-treatment: Use a cutting machine to cut the foam board into the required size and shape, prepare a flame retardant coating and coat it on the surface of the polystyrene foam board; S5: Packaging and storage: The finished foam board will be packaged and stored in the warehouse.
[0017] The preparation of the flame retardant coating in S4 includes the following steps: S401: Mixing and grinding: Mix the flame retardant, charring agent, catalyst and solvent evenly in proportion, and then grind them in a high-speed disperser to a moderate fineness; S402: Coating and drying: Coat the mixture on the surface of the polystyrene foam board, control the drying temperature at 30 °C, the thickness of each coating is about 0.2 mm, coat 3 times, and form a preliminary coating after drying; S403: Curing and expansion: The coating undergoes a chemical reaction at a high temperature, the reaction temperature is 80 °C, the reaction time is 25 - 35 min, and then an expanded carbon layer is formed.
[0018] The proportions of the flame retardant, charring agent, catalyst, and solvent in S401 are 4:2:1:1.
[0019] The steam temperature in S2 is 80 °C.
[0020] The softening temperature of S3 is 200 °C.
[0021] The cooling temperature in S3 is 100 °C, and the cooling time is 20 min.
[0022] The foaming machine in S1 is an intermittent foaming machine.
[0023] The drying treatment in S3 specifically involves feeding the polystyrene foam board into a drying chamber. The temperature of the drying chamber is 70 °C, and the drying time is 4 h.
[0024] Example Two Please refer to Figure 1 , the present invention provides a polystyrene foam board forming and processing technology, including the following steps: S1: Pre-foaming stage: Put the polystyrene particles into the hopper and send them into the foaming machine through the conveying device. In the foaming machine, heat them to 75 °C, and at the same time inject steam or compressed air to generate bubbles inside the particles and make them expand. The expanded particles are transported to the curing bin for cooling and stabilization to ensure a uniform cell structure; S2: Curing stage: After the particles are cooled to room temperature in the curing bin, heat them again to the steam temperature to further stabilize the cells. After curing is completed, the particles are transported to the forming equipment for the next step of processing; S3: Compression molding stage: The forming machine heats the particles to the softening temperature and applies pressure to make them fill the mold cavity. In the mold, the particles expand due to heat and fill the mold space. After cooling, they are solidified into a foam board. The formed foam board needs to undergo cooling and drying treatments to ensure the stability of its physical properties; S4: Cutting and post-treatment: Use a cutting machine to cut the foam board into the required size and shape, prepare a flame retardant coating and coat it on the surface of the polystyrene foam board; S5: Packaging and storage: The finished foam board will be packaged and stored in the warehouse.
[0025] The preparation of the flame retardant coating in S4 includes the following steps: S401: Mixing and grinding: Mix the flame retardant, charring agent, catalyst, and solvent evenly in proportion, and then grind them in a high-speed disperser to a moderate fineness; S402: Coating and drying: Coat the mixture on the surface of the polystyrene foam board. Control the drying temperature at 35 °C, with each coating thickness about 0.15 mm, and coat 4 times. After drying, a preliminary coating is formed; S403: Curing and Expansion: The coating undergoes a chemical reaction at a high temperature. The reaction temperature is 95 °C and the reaction time is 30 min. After that, an expanded carbon layer is formed.
[0026] The ratio of the flame retardant, charring agent, catalyst and solvent in S401 is 4:2:1:1.
[0027] The steam temperature in S2 is 75 °C.
[0028] The softening temperature of S3 is 190 °C.
[0029] The cooling temperature in S3 is 90 °C and the cooling time is 15 min.
[0030] The foaming machine in S1 is an intermittent foaming machine.
[0031] The drying treatment in S3 is specifically to send the polystyrene foam board into a drying room. The temperature of the drying room is 65 °C and the drying time is 4 h.
[0032] Example Three Please refer to Figure 1 , the present invention provides a forming and processing process for polystyrene foam board, including the following steps: S1: Pre-foaming stage: Put polystyrene particles into a hopper and send them into a foaming machine through a conveying device. In the foaming machine, heat them to 78 °C, and at the same time inject steam or compressed air to make bubbles generate and expand inside the particles. The expanded particles are transported to a ripening bin for cooling and stabilization to ensure a uniform cell structure; S2: Ripening stage: After the particles are cooled to room temperature in the ripening bin, heat them to the steam temperature again to further stabilize the cells. After ripening is completed, the particles are transported to a forming device for the next processing; S3: Compression molding stage: The forming machine heats the particles to the softening temperature and applies pressure to make them fill the mold cavity. In the mold, the particles expand due to heat and fill the mold space. After cooling, they are solidified into a foam board. The formed foam board needs to undergo cooling and drying treatments to ensure its stable physical properties; S4: Cutting and post-treatment: Use a cutting machine to cut the foam board into the required size and shape, prepare a flame retardant coating and coat it on the surface of the polystyrene foam board; S5: Packaging and storage: The finished foam board will be packaged and stored in a warehouse.
[0033] The preparation of the flame retardant coating in S4 includes the following steps: S401: Mixing and grinding: Mix the flame retardant, charring agent, catalyst and solvent evenly according to the ratio, and then grind them in a high-speed disperser to a moderate fineness; S402: Coating and Drying: Coat the mixture on the surface of the polystyrene foam board, control the drying temperature at 37°C, the thickness of each coating is about 0.2 mm, coat 5 times, and form a preliminary coating after drying; S403: Curing and Expansion: The coating undergoes a chemical reaction at high temperature, the reaction temperature is 110°C, the reaction time is 35 min, and then an expanded carbon layer is formed.
[0034] The ratio of the flame retardant, charring agent, catalyst and solvent in S401 is 4:2:1:1.
[0035] The steam temperature in S2 is 80°C.
[0036] The softening temperature of S3 is 200°C.
[0037] The cooling temperature in S3 is 100°C, and the cooling time is 20 min.
[0038] The foaming machine in S1 selects an intermittent foaming machine.
[0039] The drying treatment in S3 specifically means sending the polystyrene foam board into a drying room, the temperature of the drying room is 70°C, and the drying time is 4 h.
[0040] Example 4 Please refer to Figure 1 , the present invention provides a forming and processing process for a polystyrene foam board, including the following steps: S1: Pre-foaming stage: Put the polystyrene particles into the hopper, send them into the foaming machine through the conveying device, in the foaming machine, heat to 73°C, and at the same time inject steam or compressed air to generate bubbles inside the particles and make them expand. The expanded particles are transported to the curing bin for cooling and stabilization to ensure uniform cell structure; S2: Curing stage: After the particles are cooled to room temperature in the curing bin, heat them to the steam temperature again to further stabilize the cells. After curing is completed, the particles are transported to the forming equipment for the next step of processing; S3: Compression molding stage: The forming machine heats the particles to the softening temperature and applies pressure to make them fill the mold cavity. In the mold, the particles expand due to heat and fill the mold space, and are cured into a foam board after cooling. The formed foam board needs to be cooled and dried to ensure its physical properties are stable; S4: Cutting and post-treatment: Use a cutting machine to cut the foam board into the required size and shape, prepare a flame retardant coating and coat it on the surface of the polystyrene foam board; S5: Packaging and storage: The finished foam board will be packaged and stored in the warehouse.
[0041] The preparation of the flame retardant coating in S4 includes the following steps: S401: Mixing and Grinding: Mix the flame retardant, charring agent, catalyst and solvent evenly in proportion, and then grind them in a high-speed disperser until the fineness is appropriate; S402: Coating and Drying: Coat the mixture on the surface of the polystyrene foam board, control the drying temperature at 33 °C, the thickness of each coating is about 0.1 mm, coat 3 times, and form a preliminary coating after drying; S403: Curing and Swelling: The coating undergoes a chemical reaction at high temperature, the reaction temperature is 90 °C, the reaction time is 28 min, and then an expanded carbon layer is formed.
[0042] The proportions of the flame retardant, charring agent, catalyst and solvent in S401 are 4:2:1:1.
[0043] The steam temperature in S2 is 70 °C.
[0044] The softening temperature of S3 is 180 °C.
[0045] The cooling temperature in S3 is 80 °C, and the cooling time is 10 min.
[0046] The foaming machine in S1 selects an intermittent foaming machine.
[0047] The drying treatment in S3 is specifically to send the polystyrene foam board into a drying room, the temperature of the drying room is 60 °C to 70 °C, and the drying time is 4 h.
[0048] In the present invention, by coating a flame retardant coating on the foam board, the flame retardancy and fire resistance of the polystyrene foam board can be greatly improved, so that when it is used near electrical equipment, cable boxes, and ceiling light frames, the release of toxic smoke can be avoided, which may affect the physical health of the surrounding personnel.
[0049] The above are only the preferred embodiments of the present invention, and are not limitations to the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims
1. A processing technology for forming a polystyrene foam board, characterized in that, It includes the following steps: S1: Pre-foaming stage: Put polystyrene particles into the hopper, and send them into the foaming machine through the conveying device. In the foaming machine, heat them to 70 - 80 °C, and at the same time inject steam or compressed air to generate bubbles inside the particles and make them expand. The expanded particles are transported to the curing bin for cooling and stabilization to ensure a uniform cell structure; S2: Curing stage: After the particles are cooled to room temperature in the curing bin, heat them again to the steam temperature to further stabilize the cells. After curing is completed, the particles are transported to the molding equipment for the next processing; S3: Compression molding stage: The molding machine heats the particles to the softening temperature and applies pressure to make them fill the mold cavity. In the mold, the particles expand due to heat and fill the mold space. After cooling, they are solidified into a foam board. The formed foam board needs to go through cooling and drying processes to ensure the stability of its physical properties; S4: Cutting and post-treatment: Use a cutting machine to cut the foam board into the required size and shape, prepare a flame-retardant coating and coat it on the surface of the polystyrene foam board; S5: Packaging and storage: The finished foam board will be packaged and stored in the warehouse.
2. The polystyrene foam board forming and processing process according to claim 1, characterized in that: The preparation of the flame-retardant coating in S4 includes the following steps: S401: Mixing and grinding: Mix the flame retardant, charring agent, catalyst and solvent evenly according to the ratio, and then grind them in a high-speed disperser to a moderate fineness; S402: Coating and drying: Coat the mixture on the surface of the polystyrene foam board, control the drying temperature at 30 °C - 40 °C, the thickness of each coating is about 0.1 - 0.2 mm, coat 3 - 5 times, and form a preliminary coating after drying; S403: Curing and expansion: The coating undergoes a chemical reaction at high temperature, the reaction temperature is 80 - 120 °C, the reaction time is 25 - 35 min, and then an expanded carbon layer is formed.
3. The polystyrene foam board forming and processing technology according to claim 2, characterized in that: The ratio of the flame retardant, charring agent, catalyst and solvent in S401 is 4:2:1:
1.
4. The polystyrene foam board forming and processing process according to claim 1, characterized in that: The steam temperature in S2 is 70 - 80 °C.
5. The polystyrene foam board forming and processing process according to claim 1, characterized in that: The softening temperature in S3 is 180 - 200 °C.
6. The polystyrene foam board forming and processing process according to claim 1, characterized in that: The cooling temperature in S3 is 80 - 100 °C, and the cooling time is 5 - 20 min.
7. The polystyrene foam board forming and processing process according to claim 1, characterized in that: The foaming machine in S1 is an intermittent foaming machine.
8. The polystyrene foam board forming and processing technology according to claim 7, characterized in that: The drying treatment in S3 is specifically to send the polystyrene foam board into a drying room, the temperature of the drying room is 60 °C to 70 °C, and the drying time is 4 h.