A special-shaped edge-sealing product and its preparation method

Abstract

The present invention belongs to the technical field of C08L, and more particularly relates to a special-shaped edge-sealing product and a preparation method thereof. In the first aspect of the present invention, a special-shaped edge-sealing product is provided, and the raw materials for preparation include a high-molecular substrate with a polymerization degree of 500-1500, calcium powder, functional additives, and processing additives. The edge-sealing product prepared by the present invention can be used for special-shaped edge-sealing. Especially for products with small angles, a better edge-sealing effect can be achieved. In the edge-sealing product cooperation system provided by the present invention, stearic acid and PE wax are used, enabling part of the stress dissipation of heavy calcium powder. When performing the flexural resistance test, there is no fracture, which improves the application value of the special-shaped edge-sealing product.

Description

Technical Field

[0001] The present invention belongs to the technical field of C08L, and more particularly relates to a special-shaped edge banding product and a preparation method thereof. Background Art

[0002] As a product for protecting or beautifying the surface of furniture boards, edge banding strips are mainly used for edge banding of plywood, particle board and medium density fiberboard.

[0003] Currently, most of the edge banding strips on the market are wear-resistant edge banding strips. However, with the progress of technology and the improvement of people's pursuit, the styles of furniture are gradually diversified, and the corresponding performance requirements for edge banding strips are also increasing. Now there are more circular or angled edge banding requirements in home decoration or offices. For this demand, the edge banding strips also need to have some special toughness or bending performance to meet the edge banding requirements of furniture.

[0004] Chinese invention patent with patent application number 202011240263.1 discloses an anti-shrinkage PVC edge banding strip and a preparation method thereof. The preparation raw materials of the edge banding strip provided in the disclosed patent include PVC powder, inorganic filler, plasticizer, thermoreversible crosslinking agent DCPD, heat stabilizer, impact modifier, lubricant. The disclosed patent focuses on the optimization and improvement of dimensional stability to ensure that the product adapts to different use environments of high and low temperatures, cold and heat cycles, and endows the product with good shape memory. However, in the disclosed patent, the calcium carbonate used is calcium carbonate with a particle size of 30-50 nm. Due to the too small particle size of calcium carbonate, agglomeration is likely to occur during use, resulting in uneven mixing or processing defects in the prepared edge banding strip, affecting its use.

[0005] In order to further ensure that the prepared edge banding product can not only meet the processing stability but also achieve the edge banding requirements of different shapes, preparing a special-shaped edge banding product is an important research and development. Summary of the Invention

[0006] In order to make the prepared edge banding product suitable for use in different shapes, preparing a special-shaped edge banding product is also an important problem to be solved at present.

[0007] To solve the above technical problems, the first aspect of the present invention provides a special-shaped edge banding product, and the preparation raw materials include a polymer substrate with a polymerization degree of 500-1500, calcium powder, functional additives and processing additives.

[0008] As a preferred embodiment, the polymer substrate is selected from at least one of PVC and ABS.

[0009] More preferably, the polymer substrate is PVC.

[0010] As a preferred embodiment, the degree of polymerization is 700 - 1300; preferably, the degree of polymerization is 1000.

[0011] In some preferred embodiments, the polymer of the polymer substrate is 1000.

[0012] The model of the polymer substrate is TG - 1000R.

[0013] Further preferably, the melt flow rate of the polymer substrate under the conditions of 230 °C and 2.16 kg is 1 - 10 g / 10 min.

[0014] Further preferably, the melt flow rate of the polymer substrate under the conditions of 230 °C and 2.16 kg is 5 - 7 g / 10 min.

[0015] More preferably, the melt flow rate of the polymer substrate is 6 g / 10 min.

[0016] During the experiment, the applicant found that the selection of different substrates has a relatively large difference in the subsequent raw material mixing, granulation, and the performance of the edge - sealing products prepared subsequently. In particular, it was found that when the degree of polymerization is 1000 and the polymer substrate with a melt flow rate of 6 g / 10 min is used, during the melt granulation process, its mixing and filling effects with calcium powder, functional additives, and processing additives in this system are more sufficient. It can make the calcium powder form a more compact filling effect among the polymer network structures formed by the substrate, ensuring that the shrinkage rate of the prepared edge - sealing product is less than 0.2%. And, during the experiment, the applicant found that theoretically, after the degree of polymerization of the substrate is determined, the melt flow rate may not have a great impact on the product performance. However, during the experiment, it was found that after replacing the polymer substrates with two parameters, during the performance test, there were significant differences in both its mechanical properties and shrinkage rate. The applicant checked each physical property parameter in the polymer substrate and finally found that a relatively important parameter affecting its shrinkage rate and mechanical properties lies in the melt flow rate. Especially when the melt flow rate is controlled at 6 g / 10 min, especially when used in winter in the north, the shrinkage rate of the edge - sealing product can be reduced to 0.2%, avoiding the shrinkage problem that may occur in its actual application.

[0017] As a preferred embodiment, the calcium powder includes at least one of heavy calcium powder and light calcium powder.

[0018] Further preferably, the calcium powder is heavy calcium powder.

[0019] In some preferred embodiments, the particle size of the heavy calcium powder is 2000 - 3000 mesh.

[0020] Further preferably, the particle size of the heavy calcium powder is 2500 mesh.

[0021] During the experiment, the applicant found that when using heavy calcium powder as the filling particles to prepare the edge sealing product, different problems would also occur, and there were some practical problems in terms of cost, reaction process, and finished product performance. For example, when using heavy calcium powder with different particle sizes, there would be a large difference in cost first. Secondly, when mixing heavy calcium powder with different particle sizes, problems such as agglomeration would occur during the mixing process, ultimately resulting in surface depressions or roughness on the prepared product, seriously affecting the use of the edge sealing product. To solve the problems in the above R & D process, after a large number of creative explorations, the applicant found that in this system, when using PVC powder with a polymerization degree of 1000 and ensuring that the melt flow rate of the PVC powder is 6 g / 10 min, using heavy calcium powder with a particle size of 2500 mesh solved the problems in the above R & D process. The applicant guessed that the possible reason is: a specific PVC powder has a unique network structure and spatial type, and heavy calcium powder with a particle size of 2500 mesh has better compatibility in this system. In this system, when using heavy calcium powder with a particle size larger than 2500 mesh, due to its higher surface chemical activity, the collision frequency between particles increases, resulting in agglomeration and sedimentation phenomena in the system, affecting processing and use; however, when using heavy calcium powder with a particle size smaller than 2500 mesh, due to its too large particle size, its filling effect in this network structure is not good, resulting in a rough surface of the edge sealing product, affecting the appearance; or as the use time prolongs, particle migration occurs, resulting in the shedding of the edge sealing product, greatly affecting the quality and use effect of the edge sealing product.

[0022] As a preferred embodiment, the functional additives include at least one of a toughening agent, a plasticizer, a lubricant, an antioxidant, a flame retardant, and a stabilizer.

[0023] Further preferably, the functional additives include a toughening agent, a plasticizer, and a lubricant.

[0024] As a preferred embodiment, the toughening agent is selected from at least one of MBS, CPE, and NBR.

[0025] In some preferred embodiments, the content of the toughening agent accounts for 4 - 10% of the weight of the polymer substrate.

[0026] Further preferably, the content of the toughening agent accounts for 6% of the weight of the polymer substrate.

[0027] As a preferred embodiment, the weight ratio of MBS to CPE is (1 - 3) : (2 - 5).

[0028] Further preferably, the weight ratio of MBS to CPE is 2 : 3.

[0029] Further preferably, the chlorine content of the CPE is 35 ± 2 wt%.

[0030] The CPE grade is WEIPREN 6000.

[0031] As a preferred embodiment, the plasticizer includes at least one of epoxidized soybean oil, methyl epoxidized acetyl ricinoleate, butyl epoxidized fatty acid, and dioctyl terephthalate.

[0032] In some preferred embodiments, the lubricant includes stearic acid and PE wax.

[0033] Further preferably, the weight ratio of stearic acid to PE wax is (1 - 5):5.

[0034] More preferably, the weight ratio of stearic acid to PE wax is 3:5.

[0035] In the present application, the toughening agent preferably uses a compounding scheme of MBS and CPE. And when the weight ratio of MBS to CPE is 2:3 and the content of the toughening agent is 6% of the weight of the polymer substrate, it can ensure that the prepared edge-sealing product is used for small-angle turning edge-sealing, especially meeting the edge-sealing at 45°. For this result, the applicant has conducted a large number of experiments and explorations. Finally, it is found that only when the content of the toughening agent is 6% of the weight of the polymer substrate and the weight ratio of the two toughening agents MBS to CPE is 2:3 can the effect of the present application be achieved. The applicant speculates the possible reasons: In this system, using CPE with a chlorine content of 35 ± 2 wt% can achieve better mixing with PVC. At the same time, it ensures the uniform dispersion of MBS in PVC. Since CPE has no double-bond structure, while ensuring that the prepared edge-sealing product has appropriate hardness, it ensures that when the edge-sealing product is subjected to a bending external force impact of 45°, the external stress can be better dissipated, avoiding stress concentration. And, in combination with stearic acid and PE wax in the system, the heavy calcium powder can also dissipate a part of the stress. When performing the folding resistance test, there is no fracture, which improves the application value of the special-shaped edge-sealing product. Tangent.

[0036] In some preferred embodiments, the raw materials for preparing the special-shaped edge-sealing product further include a calcium-zinc stabilizer.

[0037] In some preferred embodiments, the raw materials for preparing the special-shaped edge-sealing product include a polymer substrate with a polymerization degree of 500 - 1500, calcium powder, a calcium-zinc stabilizer, a toughening agent, a plasticizer, a lubricant, and a processing aid.

[0038] In some preferred embodiments, the preparation raw materials, by weight, include: 80 - 200 parts of a high molecular substrate with a polymerization degree of 500 - 1500, 5 - 30 parts of calcium powder, 1 - 10 parts of calcium-zinc stabilizer, 0.5 - 10 parts of toughening agent, 1 - 10 parts of plasticizer, 0.1 - 5 parts of lubricant, and 0.1 - 3 parts of processing aid.

[0039] In the second aspect of the present invention, a method for preparing a special-shaped edge banding product is provided, including the following steps: mixing the raw materials, heating and extruding them into pellets by a screw extruder, and then molding to obtain a special-shaped product.

[0040] Beneficial effects

[0041] Compared with the prior art, the positive progress of the present invention lies in:

[0042] 1) The edge banding product prepared by the present invention can be used for special-shaped edge banding. Especially for small-angle products, a better edge banding effect can be achieved.

[0043] 2) For the edge banding product provided by the present invention, especially when used in winter in the north, the shrinkage rate of the edge banding product can be reduced to 0.2%, avoiding the possible edge banding shrinkage problem in its actual application.

[0044] 3) The edge banding product provided by the present invention uses PVC powder with a polymerization degree of 1000 and ensures that the melt flow rate of the PVC powder is 6 g / 10 min. Under this condition, using heavy calcium powder with a particle size of 2500 mesh solves the problem of agglomeration during the production process, avoiding the phenomenon that the prepared product has surface depressions or surface roughness, which seriously affects the use of the edge banding product.

[0045] 4) In the compounding system of the edge banding product provided by the present invention, stearic acid and PE wax are used, enabling part of the stress dissipation of the heavy calcium powder. When performing the flexural resistance test, there is no fracture, improving the application value of the special-shaped edge banding product and reducing the edge chipping of the edge banding. Description of the drawings

[0046] Figure 1 It is a picture of the edge banding strip with a beveled edge in Example 3 of the present application;

[0047] Figure 2 It is a picture of the edge banding strip with a C-shaped edge in Example 2 of the present application;

[0048] Figure 3 It is a picture of the edge banding strip with a J-shaped edge in Example 1 of the present application. Detailed embodiments

[0049] Examples

[0050] Example 1

[0051] A special-shaped edge banding product, the preparation raw materials are calculated by weight and include: 100 parts of a high molecular substrate with a polymerization degree of 500 - 1500, 15 parts of calcium powder, 5 parts of calcium-zinc stabilizer, 4 parts of toughening agent, 5 parts of plasticizer, 0.8 parts of lubricant, and 1 part of processing aid.

[0052] The high molecular substrate with a polymerization degree of 500 - 1500 is PVC, with a polymerization degree of 1000, model number Dong Cao TG - 1000R, and a melt flow rate of 6 g / 10 min;

[0053] The calcium powder is heavy calcium powder with a particle size of 2500 mesh, purchased from Huixin Mining Factory in Lingshou County;

[0054] The toughening agent is MBS and CPE, and their weight ratio is 2:3;

[0055] The grade of MBS is Korean LG impact modifier EM538; the chlorine content of CPE is 35 ± 2 wt%, and the grade is Weifang Yaxing Weipren6000;

[0056] The plasticizer is dioctyl terephthalate;

[0057] The lubricant is stearic acid and PE wax, and their weight ratio is 3:5;

[0058] The processing aid is ACR, purchased from Weihai Kingfa Rohm and Haas K121;

[0059] The second aspect of this embodiment provides a preparation method for a special-shaped edge banding product, including the following steps: mixing the raw materials, heating and extruding and pelletizing through a screw extruder, and then molding to obtain a special-shaped product.

[0060] Example 2

[0061] A special-shaped edge banding product, the preparation raw materials are calculated by weight and include: 100 parts of a high molecular substrate with a polymerization degree of 500 - 1500, 15 parts of calcium powder, 5 parts of calcium-zinc stabilizer, 4 parts of toughening agent, 5 parts of plasticizer, 0.8 parts of lubricant, and 1 part of processing aid.

[0062] The high molecular substrate with a polymerization degree of 500 - 1500 is PVC, with a polymerization degree of 1000, model number Dong Cao TG - 1000S, and a melt flow rate of 1 g / 10 min;

[0063] The calcium powder is heavy calcium powder with a particle size of 2500 mesh, purchased from Huixin Mining Factory in Lingshou County;

[0064] The toughening agent is MBS and CPE, and their weight ratio is 2:3;

[0065] The grade of MBS is the impact modifier EM538 of LG Korea; the chlorine content of CPE is 35±2 wt%, and the grade is Weipren 6000 of Weifang Yaxing.

[0066] The plasticizer described is dioctyl terephthalate;

[0067] The lubricant described is stearic acid and PE wax, and their weight ratio is 3:5;

[0068] The processing aid described is ACR, purchased from Weihai Kingfa Rohm and Haas K121;

[0069] The second aspect of this embodiment provides a preparation method of a special-shaped edge-sealing product, including the following steps: mixing the raw materials, heating and extruding them into pellets through a screw extruder, and then molding to obtain a special-shaped product.

[0070] Example 3

[0071] A special-shaped edge-sealing product, the preparation raw materials are calculated by weight, including: 100 parts of a high-molecular substrate with a polymerization degree of 500-1500, 15 parts of calcium powder, 5 parts of calcium-zinc stabilizer, 4 parts of toughening agent, 5 parts of plasticizer, 0.8 part of lubricant, and 1 part of processing aid.

[0072] The high-molecular substrate with a polymerization degree of 500-1500 described is PVC, with a polymerization degree of 1000, model number of Tosoh TG-1000R, and a melt flow rate of 6 g / 10 min;

[0073] The calcium powder described is heavy calcium powder with a particle size of 1000 mesh, purchased from Huixin Mining Processing Factory, Lingshou County;

[0074] The toughening agent described is MBS and CPE, and their weight ratio is 2:3;

[0075] The grade of MBS is the impact modifier EM538 of LG Korea; the chlorine content of CPE is 35±2 wt%, and the grade is Weipren 6000 of Weifang Yaxing.

[0076] The plasticizer described is dioctyl terephthalate;

[0077] The lubricant described is stearic acid and PE wax, and their weight ratio is 3:5;

[0078] The processing aid described is ACR, purchased from Weihai Kingfa Rohm and Haas K121;

[0079] The second aspect of this embodiment provides a preparation method of a special-shaped edge-sealing product, including the following steps: mixing the raw materials, heating and extruding them into pellets through a screw extruder, and then molding to obtain a special-shaped product.

[0080] Example 4

[0081] A special-shaped edge banding product, the preparation raw materials are calculated by weight and include: 100 parts of a high molecular substrate with a polymerization degree of 500 - 1500, 15 parts of calcium powder, 5 parts of calcium-zinc stabilizer, 4 parts of toughening agent, 5 parts of plasticizer, 0.8 parts of lubricant, and 1 part of processing aid.

[0082] The high molecular substrate with a polymerization degree of 500 - 1500 is PVC, with a polymerization degree of 1000, model number Dongcao TG-1000R, and a melt flow rate of 6 g / 10 min;

[0083] The calcium powder is heavy calcium powder with a particle size of 5000 mesh, purchased from Huixin Mining Processing Factory, Lingshou County;

[0084] The toughening agent is MBS and CPE, and their weight ratio is 2:3;

[0085] The grade of MBS is Korean LG impact modifier EM538; the chlorine content of CPE is 35 ± 2 wt%, and the grade is Weifang Yaxing Weipren6000;

[0086] The plasticizer is dioctyl terephthalate;

[0087] The lubricant is stearic acid and PE wax, and their weight ratio is 3:5;

[0088] The processing aid is ACR, purchased from Weihai Kingfa Rohm and Haas K121;

[0089] The second aspect of this embodiment provides a preparation method for a special-shaped edge banding product, including the following steps: mixing the raw materials, heating and extruding and granulating through a screw extruder, and then molding to obtain a special-shaped product.

[0090] Example 5

[0091] A special-shaped edge banding product, the preparation raw materials are calculated by weight and include: 100 parts of a high molecular substrate with a polymerization degree of 500 - 1500, 15 parts of calcium powder, 5 parts of calcium-zinc stabilizer, 4 parts of toughening agent, 5 parts of plasticizer, 0.8 parts of lubricant, and 1 part of processing aid.

[0092] The high molecular substrate with a polymerization degree of 500 - 1500 is PVC, with a polymerization degree of 1000, model number Dongcao TG-1000R, and a melt flow rate of 6 g / 10 min;

[0093] The calcium powder is heavy calcium powder with a particle size of 2500 mesh, purchased from Huixin Mining Processing Factory, Lingshou County;

[0094] The toughening agent is MBS; the grade of MBS is Korean LG impact modifier EM538;

[0095] The plasticizer described above is dioctyl terephthalate;

[0096] The lubricant described above is stearic acid and PE wax, and their weight ratio is 3:5;

[0097] The processing aid described above is ACR, purchased from Weihai Kingfa Rohm and Haas K121;

[0098] The second aspect of this embodiment provides a method for preparing a special-shaped edge banding product, including the following steps: mixing the raw materials, heating and extruding them into pellets through a screw extruder, and then forming to obtain a special-shaped product.

[0099] Example 6

[0100] A special-shaped edge banding product, the preparation raw materials are calculated by weight, including: 100 parts of a high molecular substrate with a polymerization degree of 500 - 1500, 15 parts of calcium powder, 5 parts of calcium-zinc stabilizer, 4 parts of toughening agent, 5 parts of plasticizer, 0.8 parts of lubricant, and 1 part of processing aid.

[0101] The high molecular substrate with a polymerization degree of 500 - 1500 is PVC, with a polymerization degree of 1000, model number Tosoh TG-1000R, and a melt flow rate of 6 g / 10 min;

[0102] The calcium powder is heavy calcium powder with a particle size of 2500 mesh, purchased from Huixin Mining Factory, Lingshou County;

[0103] The toughening agent is MBS and CPE, and their weight ratio is 2:3;

[0104] The grade of MBS is Korean LG impact modifier EM538; the chlorine content of CPE is 35 ± 2 wt%, and the grade is Weifang Yaxing Weipren6000;

[0105] The plasticizer described above is dioctyl terephthalate;

[0106] The lubricant described above is PE wax;

[0107] The processing aid described above is ACR, purchased from Weihai Kingfa Rohm and Haas K121;

[0108] The second aspect of this embodiment provides a method for preparing a special-shaped edge banding product, including the following steps: mixing the raw materials, heating and extruding them into pellets through a screw extruder, and then forming to obtain a special-shaped product.

[0109] Performance Test

[0110] 1. Shrinkage rate test: The products prepared in Examples 1-6 were used for shrinkage rate test, and the test method was referred to; Cut a sealing strip about 100 mm long and place it in an oven at 60 °C for 1 h, then take it out and cool it to room temperature. Shrinkage rate = (original specimen length - length of specimen after shrinkage) / original specimen length × 100%.

[0111] 2. Flexural resistance test: The products prepared in Examples 1-6 were used for flexural resistance test, and the test method was referred to; Cut a sealing strip about 200 mm long and place it in a refrigerator at 0 °C for 1 h, then take it out and immediately bend it continuously from the middle, with a bending angle of 90-150°, and record the number of bending times when cracks appear at the bending point.

[0112] 3. Hardness test: The products prepared in Examples 1-6 were used for hardness test, and the test method was referred to GB / T 2411-2008.

[0113] Record the above test results in the following table:

[0114] Example Shrinkage rate / % Flexural resistance Hardness Example 1 0.10 20 80 Example 2 0.15 8 79 Example 3 0.19 6 81 Example 4 0.18 9 78 Example 5 0.20 12 82 Example 6 0.19 14 81

Claims

1. A special-shaped edge-sealing product, characterized in that, The preparation raw materials include a polymer substrate with a polymerization degree of 500 - 1500, calcium powder, functional additives, and processing aids; The polymer substrate is PVC; The polymer substrate has a polymerization degree of 1000, the model is Tosoh TG - 1000R, and the melt flow rate is 6 g / 10 min under the conditions of 230 °C and 2.16 kg; The calcium powder is heavy calcium powder; The calcium powder is heavy calcium powder with a particle size of 2500 mesh; The functional additives include a toughening agent, a plasticizer, and a lubricant; The toughening agent is MBS and CPE; the weight ratio of MBS to CPE is 2:

3.

2. The special-shaped edge-sealing product according to claim 1, wherein The plasticizer includes at least one of epoxidized soybean oil, methyl epoxylinoleate, butyl epoxylinoleate, and dioctyl terephthalate.

3. A method for preparing a special-shaped edge-sealed product according to any one of claims 1-2, characterized in that, It includes the following steps: Mix the raw materials, heat and extrude them into pellets through a screw extruder, and then form them to obtain a special-shaped product.

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