PVC profile lining formula, glass door, production process and application

Abstract

The invention discloses a PVC profile lining formula, a glass door, a production process and application, the PVC profile lining formula comprises the following raw materials by weight: 80 parts of a mixed white material for polyurethane foaming; 100 parts of a black material for polyurethane foaming; 5 to 25 parts of aerogel powder; according to the invention, a polyurethane foaming material added with aerogel powder and a PVC extrusion cavity lining injection roll coating and curing technology are adopted to form a heat insulation protection layer, and a certain heat insulation height is piled up; the problem of high heat conductivity coefficient of the PVC extrusion profile is solved, the thermal insulation performance is improved, the energy consumption is reduced, and the customer satisfaction is improved.

Description

Technical Field

[0001] The invention relates to the technical field of thermal insulation performance of PVC products, and in particular to a PVC profile lining formula, a glass door, a production process and an application. Background Art

[0002] PVC is one of the most produced general-purpose plastics in the world. Its excellent mechanical properties, corrosion resistance and electrical insulation properties, coupled with its low production cost, make it widely used in the electrical, construction and automotive fields.

[0003] Since the molecular chain of PVC plastic has high polarity and poor plasticity, it is necessary to add more than 40% of plasticizers and fillers (calcium carbonate) and other materials to make its thermal conductivity as high as 0.31-0.45W / (m*K). When PVC products are used in refrigerator door profiles, due to the high thermal conductivity, condensation will occur on the profile surface, causing instability to users. Summary of the invention

[0004] The main purpose of the invention is to provide a PVC profile lining formula, a glass door, a production process and an application, aiming to solve the existing technical problems.

[0005] To achieve the above object, the present invention provides a PVC profile lining formula, which is composed of the following raw materials in parts by weight:

[0006] 80 parts of mixed white material for polyurethane foaming;

[0007] 100 parts of black material for polyurethane foaming;

[0008] 5 to 25 parts of aerogel powder.

[0009] Furthermore, the following components are included in the proportion by weight:

[0010] 80 parts of mixed white material for polyurethane foaming;

[0011] 100 parts of black material for polyurethane foaming;

[0012] 10 parts aerogel powder.

[0013] Furthermore, the following components are included in the proportion by weight:

[0014] 80 parts of mixed white material for polyurethane foaming;

[0015] 100 parts of black material for polyurethane foaming;

[0016] 20 parts aerogel powder.

[0017] Furthermore, the mixed white material for polyurethane foaming is a mixture of polyol, foaming agent and foaming aid.

[0018] A PVC frame glass door, wherein the lining of the glass door adopts the above-mentioned PVC profile lining formula.

[0019] A production process for processing the above-mentioned PVC frame glass door specifically comprises the following steps:

[0020] PVC extrusion profile tilting shaping process: two-end fixed rotating tooling with adjustable tilt angle (5°~15°);

[0021] Static electricity removal: Use 0.2-0.8MPa compressed air with moisture to blow on the profile surface and each cavity lining for 1-2S;

[0022] Profile rotation: The rotary tool rotates slowly around the axis at 6 to 15 revolutions per minute;

[0023] Injection mixing in the inner cavity: With the injection gun tip facing downward, adjust the injection speed (10-200g / s), shake and then inject into each cavity;

[0024] Foam liquid rolling coating: polyurethane foam material is mixed and rolled at the same time;

[0025] Cavity wall film formation + bottom stacking: continuous rolling for 8 to 10 minutes, standing for aging for 10 to 20 minutes, the bottom filler is about 1 / 5 to 1 / 3 of the height;

[0026] Cutting and shaping: Cutting and shaping of PVC extrusion strips for surrounding assembly.

[0027] Furthermore, in the shaping process, the bottom of the profile is plugged with a foam plug, the top is open, and other openings are plugged with tape.

[0028] Furthermore, the rotation speed of the rotating tooling is adjusted during the foam liquid roller coating, and priority is given to ensuring that the coating around the maximum cross-section cavity is uniform and an anti-static exhaust device is used around it.

[0029] An application of a PVC profile lining formula, such as the above-mentioned PVC profile lining formula is applied to PVC frame glass doors or other PVC products.

[0030] The beneficial effects of the present invention are embodied in:

[0031] The invention adds aerogel powder to the polyurethane foam material, and the PVC extrusion cavity lining injection roll coating and curing technology to form a heat insulation protection layer, and stack a certain heat preservation height; solve the problem of high thermal conductivity of PVC extrusion profiles, improve heat preservation performance, reduce energy consumption, and improve customer satisfaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The present invention is a schematic diagram of the production process of the PVC frame glass door. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0034] The present invention provides a PVC profile lining formula, which is composed of the following raw materials in parts by weight:

[0035] 80 parts of mixed white material for polyurethane foaming;

[0036] 100 parts of black material for polyurethane foaming;

[0037] 5 to 25 parts of aerogel powder.

[0038] Specifically, the mixed white material for polyurethane foaming is a mixture of polyol, foaming agent and foaming aid.

[0039] The present invention also provides a PVC frame glass door, the lining of the glass door adopts the above-mentioned PVC profile lining formula.

[0040] The present invention also provides a production process for processing the above-mentioned PVC frame glass door, which specifically comprises the following steps:

[0041] PVC extrusion profile tilting shaping process: two-end fixed rotating tooling with adjustable tilt angle (5°~15°);

[0042] Static electricity removal: Use 0.2-0.8MPa compressed air with moisture to blow on the profile surface and each cavity lining for 1-2S;

[0043] Profile rotation: The rotary tool rotates slowly around the axis at 6 to 15 revolutions per minute;

[0044] Injection mixing in the inner cavity: With the injection gun tip facing downward, adjust the injection speed (10-200g / s), shake and then inject into each cavity;

[0045] Foam liquid rolling coating: polyurethane foam material is mixed and rolled at the same time;

[0046] Cavity wall film formation + bottom stacking: continuous rolling for 8 to 10 minutes, standing for aging for 10 to 20 minutes, the bottom filler is about 1 / 5 to 1 / 3 of the height;

[0047] Cutting and shaping: Cutting and shaping of PVC extrusion strips for surrounding assembly.

[0048] Specifically, in the shaping process, the bottom of the profile is plugged with foam, the top is open, and other openings are plugged with tape.

[0049] Specifically, the rotation speed of the rotary tooling is adjusted during the foam liquid roller coating, priority is given to ensuring that the coating around the cavity with the largest cross-section is uniform and that an anti-static exhaust device is used around it.

[0050] Embodiment 1:

[0051] The weight parts of the raw materials of the PVC profile lining formulation in this embodiment are as follows:

[0052] 80 parts of mixed white material for polyurethane foaming;

[0053] 100 parts of black material for polyurethane foaming;

[0054] 10 parts aerogel powder.

[0055] The production process of the PVC frame glass door in this embodiment adopts the above-mentioned production process.

[0056] Embodiment 2:

[0057] The weight parts of the raw materials of the PVC profile lining formulation in this embodiment are as follows:

[0058] 80 parts of mixed white material for polyurethane foaming;

[0059] 100 parts of black material for polyurethane foaming;

[0060] 20 parts aerogel powder.

[0061] The production process of the PVC frame glass door in this embodiment is the same as that in the first embodiment.

[0062] Comparative Example:

[0063] The weight parts of the raw materials of the PVC profile lining formulation in this embodiment are as follows:

[0064] 0 parts of mixed white material for polyurethane foaming;

[0065] 0 parts of black material for polyurethane foaming;

[0066] 0 parts aerogel powder.

[0067] The production process of the PVC frame glass door in this embodiment is the same as that in the first embodiment.

[0068] Through the above examples and comparative examples, the following performance comparisons are obtained:

[0069] Take a refrigeration equipment, the temperature inside the box is 0-10℃, and install the door bodies obtained by the above method. Test respectively:

[0070] ①Insulation test: Turn off the electric auxiliary heating, and when the temperature inside the box is stable at an ambient temperature of 32°C, measure the maximum humidity corresponding to no fog condensation on the door;

[0071] ② Electric auxiliary heating power: the power required to eliminate condensation on the door body at an ambient temperature of 32°C and a relative humidity of 80%;

[0072] ③Sound insulation effect.

[0073]

[0074] From the parameters in the above table, it can be seen that adding aerogel powder and polyurethane foam to the profiles is beneficial to increasing the thermal insulation and sound insulation effects of the profiles compared to the blank group. The greater the amount of aerogel powder added, the more obvious the improvement on the above test items.

[0075] The present invention also provides an application of a PVC profile lining formula, such as the above-mentioned PVC profile lining formula being applied to a PVC frame glass door or other PVC products.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A PVC profile lining formula, characterized in that: The following raw materials in parts by weight composition: 80 parts of mixed white material for polyurethane foaming; 100 parts of black material for polyurethane foaming; 5 to 25 parts of aerogel powder.

2. A PVC profile lining formulation as claimed in claim 1, characterized in that: The following components are included in the proportion by weight: 80 parts of mixed white material for polyurethane foaming; 100 parts of black material for polyurethane foaming; 10 parts aerogel powder.

3. A PVC profile lining formulation as claimed in claim 1, characterized in that: The following components are included in the proportion by weight: 80 parts of mixed white material for polyurethane foaming; 100 parts of black material for polyurethane foaming; 20 parts aerogel powder.

4. A PVC profile lining formulation as claimed in claim 1, characterized in that: The mixed white material for polyurethane foaming is a mixture of polyol, foaming agent and foaming auxiliary agent.

5. A PVC frame glass door, characterized by: The lining of the glass door adopts the PVC profile lining formula as described in any one of claims 1-4.

6. A production process for processing the PVC frame glass door as claimed in claim 5, characterized in that: The specific steps include: PVC extrusion profile tilting shaping process: two-end fixed rotating tooling with adjustable tilt angle (5°~15°); Static electricity removal: Use 0.2-0.8MPa compressed air with moisture to blow on the profile surface and each cavity lining for 1-2S; Profile rotation: The rotary tool rotates slowly around the axis at 6 to 15 revolutions per minute; Intracavity injection mixing: With the injection gun tip facing downward, adjust the injection speed (10-200g / s), shake and then inject into each cavity; Foam liquid rolling coating: polyurethane foam material is mixed and rolled at the same time; Cavity wall film formation + bottom stacking: continuous rolling for 8 to 10 minutes, standing for aging for 10 to 20 minutes, the bottom filler is about 1 / 5 to 1 / 3 of the height; Cutting and shaping: Cutting and shaping of PVC extrusion strips for surrounding assembly.

7. The production process of the PVC frame glass door according to claim 6, characterized in that: In the shaping process, the bottom of the profile is plugged with foam, the top is open, and other openings are plugged with tape.

8. The production process of the PVC frame glass door according to claim 6, characterized in that: When the foam liquid is rolled, the rotating speed of the rotary tooling is adjusted to give priority to ensuring that the coating around the cavity with the largest cross-section is uniform and an anti-static exhaust device is used around it.

9. Application of a PVC profile lining formula, characterized in that: The PVC profile lining formula as described in any one of claims 1 to 5 is applied to PVC frame glass doors or other PVC products.

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