Spraying glue, preparation method and application thereof and air-cooled refrigerator

Abstract

The invention discloses spraying glue, a preparation method and application thereof and an air-cooled refrigerator, and belongs to the field of refrigeration appliances and refrigerators. Comprising 107 silicone oil, dimethyl silicone oil, calcium carbonate and a curing agent, the weight part of the 107 silicone oil is selected from any one of 30-35 parts, the weight part of the dimethyl silicone oil is selected from any one of 6-8 parts, the weight part of the calcium carbonate is selected from any one of 20-35 parts, and the weight part of the curing agent is selected from any one of 5-7 parts. The method is applied to the aspect of air-cooled refrigerators, solves the technical problems that an existing refrigerator fan protection method is poor in uniformity, poor in waterproof capacity and short in duration time, and a base plate is corroded after the whole machine operates for 2-3 years, and has the advantages that the base plate and water vapor can be effectively isolated, so that the base plate in the fan is prevented from being corroded by the water vapor, and the service life of the refrigerator fan is prolonged. And the service life of the fan is prolonged, so that the service life of the whole machine refrigerator is prolonged.

Description

Technical Field

[0001] The invention belongs to the field of refrigeration appliances and refrigerators, and in particular relates to a spray glue, a preparation method and application thereof, and an air-cooled refrigerator. Background Art

[0002] During the use of the refrigerator, a high humidity environment will appear inside the box. During the operation of the refrigerator, water vapor condenses on the connector shell and enters the terminal through the connector, causing terminal corrosion. For electronic refrigerator products, especially air-cooled refrigerators (products with fans installed in the freezer), due to the large humidity changes inside the refrigerator, high humidity conditions are prone to occur during defrosting, and water accumulates inside the fan. The base plate of the fan that is in a humid environment for a long time is prone to corrosion, which leads to failure.

[0003] The substrate inside the existing refrigerator fan is usually protected by a three-conformal paint, that is, by immersing the welded substrate into the three-conformal paint, a protective layer is formed on the substrate to protect the substrate. Due to its low cost, it is widely used in the protection of refrigerator fans.

[0004] However, the above protection method also has the problems of poor uniformity, poor waterproof ability and short duration. After the whole machine has been in operation for 2-3 years, the problem of substrate corrosion will occur. Summary of the invention

[0005] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to overcome the technical problems of poor uniformity, poor waterproof ability, short duration, and substrate corrosion in the existing refrigerator fan protection method after the whole machine has been running for 2-3 years. A spray glue is proposed which can effectively isolate the substrate from water vapor, thereby preventing water vapor from corroding the substrate inside the fan, thereby increasing the service life of the fan and thus increasing the service life of the whole refrigerator, as well as its preparation method, application and air-cooled refrigerator.

[0006] In order to solve the technical problem, the technical solution adopted by the present invention is:

[0007] On one hand, the present invention provides a spray glue, comprising: 107 silicone oil, dimethyl silicone oil, calcium carbonate, and a curing agent; the weight proportion of the 107 silicone oil is selected from any value between 30 and 35 parts, the weight proportion of the dimethyl silicone oil is selected from any value between 6 and 8 parts, the weight proportion of the calcium carbonate is selected from any value between 20 and 35 parts, and the weight proportion of the curing agent is selected from any value between 5 and 7 parts; the preparation steps of the spray glue include: stirring the 107 silicone oil and the dimethyl silicone oil evenly, and then adding the calcium carbonate.

[0008] The present invention also provides a method for preparing the spray glue described in the above technical solution, comprising a premixed liquid preparation step, a secondary mixed liquid preparation step, and a spray glue preparation step; the premixed liquid preparation step comprises: adding the dimethyl silicone oil to the 107 silicone oil, stirring evenly to obtain a premixed liquid; the secondary mixed liquid preparation step comprises: adding the calcium carbonate to the premixed liquid, stirring evenly to obtain a secondary mixed liquid; the spray glue preparation step comprises: adding the curing agent to the secondary mixed liquid, stirring evenly to obtain the spray glue.

[0009] Another aspect of the present invention provides the use of the spray glue described in any of the above technical solutions in protecting a refrigerator fan substrate.

[0010] Preferably, the method comprises the following steps: after drying the refrigerator fan substrate, spraying the spray glue evenly onto the refrigerator fan substrate; and baking the refrigerator fan substrate sprayed with the spray glue.

[0011] Preferably, the refrigerator fan substrate sprayed with the spray glue is subjected to a baking treatment, and the treatment temperature of the baking treatment is any value between 60-75°C.

[0012] Preferably, the refrigerator fan substrate sprayed with the spray glue is subjected to a baking treatment, and the baking treatment time is 1.5 hours.

[0013] Preferably, the spray glue is prepared by sequentially passing through a premixed liquid preparation step, a secondary mixed liquid preparation step, and a spray glue preparation step.

[0014] Preferably, the premixed liquid preparation step comprises: adding the dimethyl silicone oil to the 107 silicone oil, and stirring evenly to obtain a premixed liquid; the secondary mixed liquid preparation step comprises: adding the calcium carbonate to the premixed liquid, and stirring evenly to obtain a secondary mixed liquid; the spray glue preparation step comprises: adding the curing agent to the secondary mixed liquid, and stirring evenly to obtain the spray glue.

[0015] The present invention also provides an air-cooled refrigerator, wherein the spray glue described in any of the above technical solutions is sprayed on a substrate of the air-cooled refrigerator.

[0016] Preferably, the spray glue is sprayed on the substrate of the air-cooled refrigerator by the following method: after drying the refrigerator fan substrate, the spray glue is evenly sprayed on the refrigerator fan substrate; the refrigerator fan substrate sprayed with the spray glue is baked to obtain a refrigerator fan substrate with a protective coating on the surface; the treatment temperature of the baking treatment is any value between 60-75°C, and the treatment time is 1.5h.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention provides a spray glue, which reduces the curing time of the spray glue by improving the formula and ratio, and simultaneously improves the production efficiency of the fan;

[0019] The invention provides a method for preparing spray glue, which has the characteristics of simple process and easy industrial production;

[0020] The present invention provides an air-cooled refrigerator, on the substrate of which the above-mentioned spray glue is sprayed, and the spray glue forms a protective layer on the substrate of the air-cooled refrigerator to isolate the substrate from water vapor, thereby preventing water vapor from corroding the substrate inside the fan, thereby increasing the service life of the fan, thereby increasing the service life of the entire refrigerator. DETAILED DESCRIPTION

[0021] The technical scheme in the specific embodiment of the present invention is described in detail and completely below. Obviously, the described embodiment is only a part of the specific implementation of the overall technical scheme of the present invention, rather than all implementations. Based on the overall concept of the present invention, all other embodiments obtained by ordinary technicians in this field fall within the scope of protection of the present invention.

[0022] On one hand, the present invention provides a spray glue, comprising: 107 silicone oil, dimethyl silicone oil, calcium carbonate, and a curing agent; the weight of the 107 silicone oil is selected from any value of 30-35 parts, the weight of the dimethyl silicone oil is selected from any value of 6-8 parts, the weight of the calcium carbonate is selected from any value of 20-35 parts, and the weight of the curing agent is selected from any value of 5-7 parts; the preparation steps of the spray glue include: stirring the 107 silicone oil and the dimethyl silicone oil evenly, and then adding the calcium carbonate. The spray glue containing the above composition will not condense when placed in the air, but will condense at room temperature for about 24 hours after being mixed evenly. After adding the curing agent and stirring evenly, the mixed liquid will solidify faster. Since the mixed liquid is in liquid state and has good fluidity, it will not condense in a short time.

[0023] On the one hand, the above technical scheme limits the composition of the spray glue. The reason is that: adding dimethyl silicone oil to 107 silicone oil can form a high-viscosity mixed liquid (i.e., premixed liquid). The number of bubbles in this mixed liquid is small, and the viscosity is increased by 25%. At the same time, the waterproof performance of the mixed liquid is increased by 30%. After adding calcium carbonate to the above mixed liquid, the strength of the mixed liquid is increased, and the fluidity of the mixed liquid is reduced to form a polymer (i.e., a secondary mixed liquid). The hardness of the polymer is significantly improved compared with the previous mixed liquid. The curing agent is added to the above polymer at room temperature, which prompts the polymer to quickly form a larger molecular long chain within 30-50 minutes, and cross-links the molecular chains, which quickly produces a hardening effect from the appearance. On the other hand, the technical scheme also limits the order of adding the components in the preparation process of the spray glue. The reason is that after the 107 silicone oil and the dimethyl silicone oil are mixed, a premixed liquid with low surface tension and good moisture resistance is prepared, and the performance is improved by 30%. After stirring evenly, calcium carbonate is added for shaping so that the solution has a supporting carrier. After stirring evenly, an intermediate state of solid-liquid viscosity is formed. At this time, after the curing agent is added, the mixed viscous liquid in the solid-liquid state can be cured in a short time, thereby improving production efficiency. The above technical scheme specifically defines the composition of each component. It can be understood that the weight proportion of 107 silicone oil can also be 31, 32, 33, 34 parts and any value therein, the weight proportion of dimethyl silicone oil can also be 6.5, 7.0, 7.5 parts and any value therein, the weight proportion of calcium carbonate can also be 22, 24, 26, 28, 30, 32, 34 parts and any value therein, and the weight proportion of curing agent can also be 5.5, 6.0, 6.5 parts and any value therein.

[0024] The present invention also provides a method for preparing the spray glue described in the above technical solution, comprising a premixed liquid preparation step, a secondary mixed liquid preparation step, and a spray glue preparation step; the premixed liquid preparation step comprises: adding the dimethyl silicone oil to the 107 silicone oil, stirring evenly to obtain a premixed liquid; the secondary mixed liquid preparation step comprises: adding the calcium carbonate to the premixed liquid, stirring evenly to obtain a secondary mixed liquid; the spray glue preparation step comprises: adding the curing agent to the secondary mixed liquid, stirring evenly to obtain the spray glue. The technical scheme specifically defines the sequence of the preparation steps, wherein 107 silicone oil and dimethyl silicone oil are first mixed and stirred evenly, and then calcium carbonate is added. After the mixture is mixed and stirred evenly, a curing agent is added. Adding dimethyl silicone oil to 107 silicone oil can form a high-viscosity mixed liquid (i.e., premixed liquid). The number of bubbles in this mixed liquid is small, and the viscosity is increased by 25%. At the same time, the waterproof performance of the mixed liquid is increased by 30%. After calcium carbonate is added to the above mixed liquid, the strength of the mixed liquid is increased, and the fluidity of the mixed liquid is reduced to form a polymer (i.e., a secondary mixed liquid). The hardness of the polymer is significantly improved compared to the previous mixed liquid. The curing agent is added to the above polymer at room temperature, which prompts the polymer to quickly form a larger molecular long chain within 30-50 minutes, and cross-links the molecular chains, which quickly produces a hardening effect from the appearance. It should be noted that after 107 silicone oil and dimethyl silicone oil are mixed, a premixed liquid with low surface tension and good moisture resistance is prepared, and the performance is improved by 30%. After stirring evenly, calcium carbonate is added for shaping to give the solution a supporting carrier. After stirring evenly, an intermediate state of solid-liquid viscosity is formed. At this time, after adding the curing agent, the mixed viscous liquid in the solid-liquid state can be cured in a short time, thereby improving production efficiency.

[0025] On the other hand, the present invention provides the application of the spray glue described in any of the above technical solutions in the protection of refrigerator fan substrates. The method comprises the following steps: after drying the refrigerator fan substrate, the spray glue is evenly sprayed on the refrigerator fan substrate; the refrigerator fan substrate sprayed with the spray glue is subjected to baking treatment, wherein the treatment temperature of the baking treatment is any value in the range of 60-75°C, and the treatment time of the baking treatment is 1.5h. It should be noted that the glue used in the existing curing technology requires a long curing baking time, and a good curing effect cannot be obtained in a short time. The technical solution further defines the preparation process of the spray glue by optimizing the formula of the spray glue. In an environment of 60-75°C, it can be quickly cured after 1.5h, and a protective layer is formed on the surface of the substrate to prevent water vapor from entering, causing corrosion of the substrate and components, and improving production efficiency. This embodiment specifically defines the treatment temperature of the baking treatment. It can be understood that the treatment temperature can also be 61°C, 62°C, 63°C, 64°C and any point value within the range.

[0026] In a preferred embodiment, the spray glue is prepared by sequentially passing through a premix preparation step, a secondary mixture preparation step, and a spray glue preparation step. The premix preparation step includes: adding the dimethyl silicone oil to the 107 silicone oil, stirring evenly to obtain a premix; the secondary mixture preparation step includes: adding the calcium carbonate to the premix, stirring evenly to obtain a secondary mixture; the spray glue preparation step includes: adding the curing agent to the secondary mixture, stirring evenly to obtain the spray glue. The technical scheme specifically defines a method for preparing spray glue. First, 107 silicone oil and dimethyl silicone oil are mixed and stirred evenly, and then calcium carbonate is added. After the mixture is mixed and stirred evenly, a curing agent is added. Adding dimethyl silicone oil to 107 silicone oil can form a high-viscosity mixed liquid (i.e., premixed liquid). The number of bubbles in this mixed liquid is small, and the viscosity is increased by 25%. At the same time, the waterproof performance of the mixed liquid is increased by 30%. After calcium carbonate is added to the above mixed liquid, the strength of the mixed liquid is increased, and the fluidity of the mixed liquid is reduced to form a polymer (i.e., a secondary mixed liquid). The hardness of the polymer is significantly improved compared to the previous mixed liquid. The curing agent is added to the above polymer at room temperature, which prompts the polymer to quickly form a larger molecular long chain within 30-50 minutes, and causes cross-linking between the molecular chains, which quickly produces a hardening effect from the appearance.

[0027] The present invention also provides an air-cooled refrigerator, the substrate of which is sprayed with the spray glue described in any of the above technical solutions. It should be noted that an air-cooled refrigerator refers to a refrigerator product in which a fan is installed in a freezer. Due to the large humidity changes inside the refrigerator, high humidity conditions are prone to occur during defrosting, and water accumulates inside the fan. The fan substrate that is in a humid environment for a long time is prone to corrosion, resulting in failure. It has higher requirements for the corrosion resistance of the protective layer. The technical solution of the present invention optimizes the formula composition and preparation method of the spray glue, and the obtained spray glue is sprayed on the substrate of the air-cooled refrigerator in a 360° rotation manner using automated equipment. Compared with the three-proof paint, it has the characteristics of high uniformity and good protective effect. The protective effect can reach more than 10 years, which can effectively avoid damage to the fan substrate components and cause abnormal operation of the refrigerator.

[0028] In a preferred embodiment, the spray glue is sprayed on the substrate of the air-cooled refrigerator by the following method: after drying the refrigerator fan substrate, the spray glue is evenly sprayed on the refrigerator fan substrate; the refrigerator fan substrate sprayed with the spray glue is baked to obtain a refrigerator fan substrate with a protective coating on the surface; the treatment temperature of the baking treatment is any value between 60-75°C, and the treatment time is 1.5h.

[0029] In order to more clearly and in detail introduce the spray glue, preparation method, application and air-cooled refrigerator provided by the embodiments of the present invention, the following description will be made in conjunction with specific embodiments.

[0030] Example 1

[0031] The composition of the spray glue, by weight, includes: 30 parts of 107 silicone oil, 6 parts of dimethyl silicone oil, 20 parts of calcium carbonate, and 7 parts of curing agent.

[0032] Preparation of spray glue:

[0033] (1) Stir 107 silicone oil and methyl silicone oil thoroughly;

[0034] (2) Pour calcium carbonate into the mixed glue in step (1) and stir thoroughly;

[0035] (3) Pour the curing agent into the mixed glue of step (2) and stir well to obtain spray glue.

[0036] The spraying process of applying the above-mentioned spray glue to the refrigerator fan substrate includes the following steps:

[0037] (1) After the substrate is basically dried, the spray glue as described above is evenly sprayed onto the substrate;

[0038] (2) Bake the sprayed substrate at 60°C for 1.5 hours.

[0039] Example 2

[0040] The composition of the spray glue, by weight, includes: 35 parts of 107 silicone oil, 8 parts of dimethyl silicone oil, 35 parts of calcium carbonate, and 5 parts of curing agent.

[0041] Preparation of spray glue:

[0042] (1) Stir 107 silicone oil and methyl silicone oil thoroughly;

[0043] (2) Pour calcium carbonate into the mixed glue in step (1) and stir thoroughly;

[0044] (3) Pour the curing agent into the mixed glue of step (2) and stir well to obtain spray glue.

[0045] The spraying process of applying the above-mentioned spray glue to the refrigerator fan substrate includes the following steps:

[0046] (1) After the substrate is basically dried, the spray glue as described above is evenly sprayed onto the substrate;

[0047] (2) Bake the sprayed substrate at 75°C for 1.5 hours.

[0048] Example 3

[0049] The composition of the spray glue, by weight, includes: 32 parts of 107 silicone oil, 7 parts of dimethyl silicone oil, 30 parts of calcium carbonate, and 6 parts of curing agent.

[0050] Preparation of spray glue:

[0051] (1) Stir 107 silicone oil and methyl silicone oil thoroughly;

[0052] (2) Pour calcium carbonate into the mixed glue in step (1) and stir thoroughly;

[0053] (3) Pour the curing agent into the mixed glue of step (2) and stir well to obtain spray glue.

[0054] The spraying process of applying the above-mentioned spray glue to the refrigerator fan substrate includes the following steps:

[0055] (1) After the substrate is basically dried, the spray glue as described above is evenly sprayed onto the substrate;

[0056] (2) Bake the sprayed substrate at 70°C for 1.5 hours.

[0057] Comparative Example 1

[0058] The composition of the spray glue, by weight, includes: 32 parts of 107 silicone oil, 30 parts of calcium carbonate, and 6 parts of curing agent.

[0059] Preparation of spray glue:

[0060] (1) Add calcium carbonate to 107 silicone oil and stir thoroughly;

[0061] (2) Pour the curing agent into the mixed glue of step (3) and stir well to obtain spray glue.

[0062] The spraying process of applying the above-mentioned spray glue to the refrigerator fan substrate includes the following steps:

[0063] (1) After the substrate is basically dried, the spray glue as described above is evenly sprayed onto the substrate;

[0064] (2) Bake the sprayed substrate at 70°C for 1.5 hours.

[0065] Comparative Example 2

[0066] The composition of the spray glue, by weight, includes: 6 parts of dimethyl silicone oil, 20 parts of calcium carbonate, and 7 parts of curing agent.

[0067] Preparation of spray glue:

[0068] (1) Pour calcium carbonate into methyl silicone oil and stir thoroughly;

[0069] (2) Pour the curing agent into the mixed glue of step (1) and stir well to obtain spray glue.

[0070] The spraying process of applying the above-mentioned spray glue to the refrigerator fan substrate includes the following steps:

[0071] (1) After the substrate is basically dried, the spray glue as described above is evenly sprayed onto the substrate;

[0072] (2) Bake the sprayed substrate at 60°C for 1.5 hours.

[0073] Comparative Example 3

[0074] The composition of the spray glue, by weight, includes: 30 parts of 107 silicone oil, 6 parts of dimethyl silicone oil, 20 parts of calcium carbonate, and 7 parts of curing agent.

[0075] Preparation of spray glue:

[0076] (1) Stir 107 silicone oil, methyl silicone oil and calcium carbonate thoroughly;

[0077] (2) Pour the curing agent into the mixed glue of step (1) and stir well to obtain spray glue.

[0078] The spraying process of applying the above-mentioned spray glue to the refrigerator fan substrate includes the following steps:

[0079] (1) After the substrate is basically dried, the spray glue as described above is evenly sprayed onto the substrate;

[0080] (2) Bake the sprayed substrate at 60°C for 1.5 hours.

[0081] Comparative Example 4

[0082] The composition of the spray glue, by weight, includes: 30 parts of 107 silicone oil, 6 parts of dimethyl silicone oil, 20 parts of calcium carbonate, and 7 parts of curing agent.

[0083] Preparation of spray glue:

[0084] Stir 107 silicone oil, methyl silicone oil, calcium carbonate and curing agent thoroughly to obtain spray glue.

[0085] The spraying process of applying the above-mentioned spray glue to the refrigerator fan substrate includes the following steps:

[0086] (1) After the substrate is basically dried, the spray glue as described above is evenly sprayed onto the substrate;

[0087] (2) Bake the sprayed substrate at 60°C for 1.5 hours.

[0088] Performance Testing

[0089] 1) When the substrate is powered at rated voltage, the substrate of Example 1 is immersed in water and the fan is running. The fan can still work normally for more than 48 hours. After the fan is taken out and powered at rated voltage, the air volume, speed and noise of the fan meet the design requirements.

[0090] 2) When the substrate is powered by rated voltage, the substrate of Example 2 is immersed in water and the fan is running. The fan runs for more than 56 hours and can still work normally. After the fan is taken out and powered by rated voltage, the air volume, speed and noise of the fan meet the design requirements.

[0091] 3) When the substrate is powered by rated voltage, the substrate of comparative example 1 is immersed in water, and the fan is running. The fan runs for 24 hours and then stops. After the fan is taken out and powered by rated voltage, the fan does not run, and the air volume and speed are both 0, which does not meet the design requirements.

[0092] 4) When the substrate was powered by rated voltage, the substrate of comparative example 1 was immersed in water, and the fan was running. The fan ran for 36 hours and then stopped. After the fan was taken out and powered by rated voltage, the fan did not run, and the air volume and speed were both 0, which did not meet the design requirements.

Claims

1. A spray glue, characterized in that: include: 107 silicone oil, dimethyl silicone oil, calcium carbonate, and curing agent; The weight percentage of the 107 silicone oil is selected from any value between 30 and 35 parts, the weight percentage of the dimethyl silicone oil is selected from any value between 6 and 8 parts, the weight percentage of the calcium carbonate is selected from any value between 20 and 35 parts, and the weight percentage of the curing agent is selected from any value between 5 and 7 parts; The preparation steps of the spray glue include: stirring the 107 silicone oil and the dimethyl silicone oil evenly, and then adding the calcium carbonate.

2. The method for preparing the spray glue according to claim 1, characterized in that: The method comprises a premixed liquid preparation step, a secondary mixed liquid preparation step, and a spray glue preparation step; The premixed liquid preparation step comprises: adding the dimethyl silicone oil into the 107 silicone oil, and stirring evenly to obtain the premixed liquid; The secondary mixed solution preparation step comprises: adding the calcium carbonate to the premixed solution, and stirring evenly to obtain a secondary mixed solution; The spray glue preparation step comprises: adding the curing agent into the secondary mixed liquid, and stirring evenly to obtain the spray glue.

3. Application of the spray glue according to claim 1 in protecting refrigerator fan substrates.

4. The application of the spray glue in the protection of refrigerator fan substrate according to claim 3 is characterized in that: The following steps are involved: After drying the refrigerator fan substrate, spraying the spray glue evenly on the refrigerator fan substrate; The refrigerator fan substrate sprayed with the spray glue is subjected to a baking treatment.

5. The application of the spray glue in the protection of refrigerator fan substrate according to claim 4 is characterized in that: The refrigerator fan substrate sprayed with the spray glue is subjected to a baking treatment, and the treatment temperature of the baking treatment is any value between 60-75°C.

6. The application of the spray glue in the protection of refrigerator fan substrate according to claim 5 is characterized in that: The refrigerator fan substrate sprayed with the spray glue is subjected to a baking treatment, and the baking treatment time is 1.5 hours.

7. The application of the spray glue in the protection of refrigerator fan substrate according to claim 3 is characterized in that: The spray glue is prepared by sequentially going through a premixed liquid preparation step, a secondary mixed liquid preparation step, and a spray glue preparation step.

8. The application of the spray glue in the protection of refrigerator fan substrate according to claim 7 is characterized in that: The premixed liquid preparation step comprises: adding the dimethyl silicone oil into the 107 silicone oil, and stirring evenly to obtain the premixed liquid; The secondary mixed solution preparation step comprises: adding the calcium carbonate to the premixed solution, and stirring evenly to obtain a secondary mixed solution; The spray glue preparation step comprises: adding the curing agent into the secondary mixed liquid, and stirring evenly to obtain the spray glue.

9. An air-cooled refrigerator, characterized in that: The spray glue according to claim 1 is sprayed on the substrate of the air-cooled refrigerator.

10. The air-cooled refrigerator according to claim 9, characterized in that: The spray glue is sprayed on the substrate of the air-cooled refrigerator by the following method: After drying the refrigerator fan substrate, spraying the spray glue evenly on the refrigerator fan substrate; The refrigerator fan substrate sprayed with the spray glue is baked to obtain a refrigerator fan substrate with a protective coating on the surface; the baking treatment temperature is any value between 60-75° C., and the treatment time is 1.5 hours.