Environment-friendly halogen-free flame-retardant PP floor and preparation method thereof

Abstract

The invention discloses an environment-friendly halogen-free flame-retardant PP floor and a preparation method thereof, the environment-friendly halogen-free flame-retardant PP floor comprises a PP wear-resistant layer, a PP color film, a PP base material layer and a PP balance layer, the PP wear-resistant layer and the balance layer are prepared by a phosphorus flame retardant in an auxiliary manner, and the PP base material layer is prepared by a rare earth flame retardant in an auxiliary manner. From the two aspects of the wear-resistant layer and the base material layer, according to different requirements of the wear-resistant layer and the base material layer on flame-retardant characteristics, the flame-retardant floor is prepared by adopting flame retardants with different characteristics in an auxiliary manner, so that the flame-retardant floor has excellent flame-retardant performance and also has an environment-friendly characteristic, and the basic performance of the floor is not influenced. By adopting metal ions in rare earth, the decomposition rate of aluminum hydroxide can be accelerated in the combustion process, and a good flame-retardant effect is achieved. A rare earth flame retardant method is adopted, the smoke amount of the floor is very small, and in addition, in the processing temperature range, due to the fact that the aluminum hydroxide content is low, the appearance of the PP base material is smoother.

Description

Technical Field

[0001] The invention relates to the field of preparation of PP floor, in particular to an environmentally friendly halogen-free flame-retardant PP floor and a preparation method thereof. Background Art

[0002] At present, the flooring industry is mainly dominated by two categories: wooden flooring and PVC plastic flooring. Among them, PVC plastic flooring is a new type of lightweight floor decoration material that is very popular in the world today, also known as "lightweight flooring", and is widely used. However, since PVC contains a large amount of chlorine, the flooring releases hydrochloric acid and other toxic gases during the combustion process, which affects people's health and safety. In addition, PVC is a non-degradable plastic, which also poses a huge challenge to the environmental issues that people are increasingly concerned about.

[0003] In recent years, the rise of PP flooring has set off a wave of environmental protection in the flooring industry. However, compared with PVC flooring, PP flooring has the problem of poor flame retardancy. Therefore, research on an environmentally friendly halogen-free flame-retardant PP flooring meets the current market demand. Summary of the invention

[0004] Purpose of the invention: In order to solve the problems existing in the prior art, the present invention proposes an environmentally friendly, halogen-free, flame-retardant PP floor and a preparation method thereof which is environmentally friendly, has higher elasticity and bonding properties, and reduces costs.

[0005] Technical solution: To achieve the above purpose, the present invention adopts the following technical solution: an environmentally friendly halogen-free flame-retardant PP floor, including a PP wear-resistant layer, a PP color film, a PP bottom film, a PP substrate layer, and a PP balancing layer, wherein the PP wear-resistant layer and the balancing layer are prepared with the aid of a phosphorus-based flame retardant, and the PP bottom film\substrate layer is prepared with the aid of a rare earth flame retardant.

[0006] Furthermore, the phosphorus-based flame retardant used in the wear-resistant layer and the balancing layer is specifically ammonium polyphosphate.

[0007] Furthermore, the PP wear-resistant layer and the PP balancing layer specifically include the following components by weight: 70-100 parts of PP resin, 0-5 parts of PP elastomer, 0.2-1.0 parts of lubricant, 25-30 parts of flame retardant ammonium polyphosphate, 5-7 parts of carbonizing agent, 0.2-1.0 parts of antioxidant, and 0.1-0.5 parts of external lubricant.

[0008] Furthermore, the carbon-forming agent is a triazine carbon-forming agent.

[0009] Furthermore, the rare earth flame retardant used in the PP bottom film layer and the PP base material layer is specifically a mixture of phosphate rock rare earth ore and aluminum hydroxide.

[0010] Furthermore, the preparation method of the rare earth flame retardant is as follows: phosphate ore, rare earth ore and aluminum hydroxide are evenly mixed in a ratio of 1:4, water is added to mix into mud, after stirring for 2-3 hours, the mixed mud is flattened and dried into blocks, and processed into 300 mesh powder by a grinder to obtain a rare earth flame retardant.

[0011] Furthermore, the PP bottom sheet and PP base layer include the following components by weight: 30-50 parts of PP resin, 50-70 parts of PP elastomer, 200-250 parts of stone powder, 0.5-2.0 parts of lubricant, 250-300 parts of rare earth flame retardant, 0.5-1.0 parts of antioxidant, 1-4 parts of carbon black, and 0.1-0.5 parts of external lubricant.

[0012] Furthermore, the lubricant is stearic acid, calcium stearate, zinc stearate, and the external lubricant is PE wax.

[0013] Furthermore, the antioxidant is 1010.

[0014] The present invention also discloses a method for preparing the above-mentioned environmentally friendly halogen-free flame-retardant PP floor, comprising the following steps:

[0015] (1) Weighing corresponding weight portions of each raw material, and preparing a PP substrate layer, a PP wear-resistant layer, and a PP balancing layer through twin-screw extrusion or internal mixing, calendering, pulling, cutting, and other processes;

[0016] (2) Hot pressing bonding: From top to bottom, there is the wear-resistant layer, color film, PP substrate and PP balance film, which are bonded by hot pressing using a press.

[0017] (3) UV heat treatment: UV paint coating weight 15-20g, speed 10-15.5m / min;

[0018] (4) Multi-blade saw slotting: The floorboards are neatly stacked on pallets and slotted with multiple saws according to the specifications;

[0019] (5) Standing: Ensure that the standing time is not less than 72 hours;

[0020] (6) Product performance testing: Conduct qualification testing on finished products.

[0021] Beneficial effects: The present invention provides an environmentally friendly halogen-free flame-retardant PP floor and a preparation method thereof. Starting from the two aspects of the wear-resistant layer and the substrate layer, according to their different requirements for flame-retardant properties, it is prepared with the aid of flame retardants of different properties. While having excellent flame-retardant properties, it also has environmentally friendly properties, and the basic properties of the floor itself are not affected. The present invention uses metal ions in rare earths, which can accelerate the decomposition rate of aluminum hydroxide during the combustion process and have a good flame-retardant effect. When rare earths are not added, the decomposition rate of the flame retardant is low and the flame-retardant effect is poor. The flame retardant content required to achieve the same flame-retardant effect is very high. Using the rare earth flame retardant method, the smoke emission of the floor is very small, and in the processing temperature range, due to the low aluminum hydroxide content, the surface of the PP substrate is smoother. DETAILED DESCRIPTION

[0022] Embodiment 1:

[0023] An environmentally friendly halogen-free flame-retardant PP floor, comprising a PP wear-resistant layer, a PP color film, a PP base film, a PP substrate layer, and a PP balancing layer, wherein the PP wear-resistant layer and the balancing layer are prepared with the aid of a phosphorus-based flame retardant ammonium polyphosphate, and the PP base film and the substrate layer are prepared with the aid of a mixture of a rare earth flame retardant phosphate ore and aluminum hydroxide. The phosphorus-based flame retardant used in the wear-resistant layer and the balancing layer is specifically ammonium polyphosphate. Specifically, the PP wear-resistant layer and the PP balancing layer specifically include the following components by weight: 70 parts of PP resin, 1 part of PP elastomer, 0.2 parts of lubricant, 25 parts of flame retardant ammonium polyphosphate, 5 parts of carbonizing agent, 0.2 parts of antioxidant, and 0.1 parts of external lubricant. The PP bottom sheet and PP base layer include the following components by weight: 30 parts of PP resin, 50 parts of PP elastomer, 200 parts of stone powder, 0.5 parts of lubricant, 250 parts of rare earth flame retardant, 0.5 parts of antioxidant, 1 part of carbon black, and 0.1 parts of external lubricant.

[0024] The carbonizing agent is a triazine carbonizing agent; the preparation method of the rare earth flame retardant is as follows: phosphate ore, rare earth ore and aluminum hydroxide are mixed evenly in a ratio of 1:4, water is added to mix into mud, after stirring for 2 hours, the mixed mud is flattened and dried into blocks, and processed into 300 mesh powder by a grinder to obtain a rare earth flame retardant. The lubricant is stearic acid, calcium stearate, zinc stearate, the external lubricant is PE wax; the antioxidant is 1010.

[0025] The present invention also discloses a method for preparing the above-mentioned environmentally friendly halogen-free flame-retardant PP floor, comprising the following steps:

[0026] (1) Weighing corresponding weight portions of each raw material, and preparing a PP substrate layer, a PP wear-resistant layer, and a PP balancing layer through twin-screw extrusion or internal mixing, calendering, pulling, cutting, and other processes;

[0027] (2) Hot pressing bonding: From top to bottom, there is the wear-resistant layer, color film, PP substrate and PP balance film, which are bonded by hot pressing using a press.

[0028] (3) UV heat treatment: UV paint coating weight 15g, speed 10m / min;

[0029] (4) Multi-blade saw slotting: The floorboards are neatly stacked on pallets and slotted with multiple saws according to the specifications;

[0030] (5) Standing: Ensure that the standing time is not less than 72 hours;

[0031] (6) Product performance testing: Conduct qualification testing on finished products.

[0032] Embodiment 2:

[0033] An environmentally friendly halogen-free flame-retardant PP floor, comprising a PP wear-resistant layer, a PP color film, a PP base film, a PP substrate layer, and a PP balance layer, wherein the PP wear-resistant layer and the balance layer are prepared with the aid of a phosphorus-based flame retardant ammonium polyphosphate, and the PP base film and the substrate layer are prepared with the aid of a mixture of a rare earth flame retardant phosphate ore and aluminum hydroxide. The phosphorus-based flame retardant used in the wear-resistant layer and the balance layer is specifically ammonium polyphosphate. Specifically, the PP wear-resistant layer and the PP balance layer specifically include the following components by weight: 100 parts of PP resin, 5 parts of PP elastomer, 1.0 parts of lubricant, 30 parts of flame retardant ammonium polyphosphate, 7 parts of carbonizing agent, 1.0 parts of antioxidant, and 0.5 parts of external lubricant. The PP bottom sheet and the PP substrate layer include the following components by weight: 50 parts of PP resin, 70 parts of PP elastomer, 250 parts of stone powder, 2.0 parts of lubricant, 300 parts of rare earth flame retardant, 1.0 part of antioxidant, 4 parts of carbon black, and 0.5 parts of external lubricant.

[0034] The carbonizing agent is a triazine carbonizing agent; the preparation method of the rare earth flame retardant is as follows: phosphate ore, rare earth ore and aluminum hydroxide are mixed evenly in a ratio of 1:4, water is added to mix into mud, after stirring for 3 hours, the mixed mud is flattened and dried into blocks, and processed into 300 mesh powder by a grinder to obtain a rare earth flame retardant. The lubricant is stearic acid, calcium stearate, zinc stearate, the external lubricant is PE wax; the antioxidant is 1010.

[0035] The present invention also discloses a method for preparing the above-mentioned environmentally friendly halogen-free flame-retardant PP floor, comprising the following steps:

[0036] (1) Weighing corresponding weight portions of each raw material, and preparing a PP substrate layer, a PP wear-resistant layer, and a PP balancing layer through twin-screw extrusion or internal mixing, calendering, pulling, cutting, and other processes;

[0037] (2) Hot pressing bonding: From top to bottom, there is the wear-resistant layer, color film, PP substrate and PP balance film, which are bonded by hot pressing using a press.

[0038] (3) UV heat treatment: UV paint coating weight 20g, speed 15.5m / min;

[0039] (4) Multi-blade saw slotting: The floorboards are neatly stacked on pallets and slotted with multiple saws according to the specifications;

[0040] (5) Standing: Ensure that the standing time is not less than 72 hours;

[0041] Product performance testing: Conduct qualification testing on finished products.

[0042] Embodiment 3:

[0043] An environmentally friendly halogen-free flame-retardant PP floor, comprising a PP wear-resistant layer, a PP color film, a PP base film, a PP substrate layer, and a PP balance layer, wherein the PP wear-resistant layer and the balance layer are prepared with the aid of a phosphorus-based flame retardant ammonium polyphosphate, and the PP base film and the substrate layer are prepared with the aid of a mixture of a rare earth flame retardant phosphate ore and aluminum hydroxide. The phosphorus-based flame retardant used in the wear-resistant layer and the balance layer is specifically ammonium polyphosphate. Specifically, the PP wear-resistant layer and the PP balance layer specifically include the following components by weight: 80 parts of PP resin, 3 parts of PP elastomer, 0.5 parts of lubricant, 28 parts of flame retardant ammonium polyphosphate, 6 parts of carbonizing agent, 0.7 parts of antioxidant, and 0.3 parts of external lubricant. The PP bottom sheet and PP base layer include the following components by weight: 40 parts of PP resin, 60 parts of PP elastomer, 230 parts of stone powder, 1.5 parts of lubricant, 270 parts of rare earth flame retardant, 0.8 parts of antioxidant, 3 parts of carbon black, and 0.3 parts of external lubricant.

[0044] The carbonizing agent is a triazine carbonizing agent; the preparation method of the rare earth flame retardant is as follows: phosphate ore, rare earth ore and aluminum hydroxide are mixed evenly in a ratio of 1:4, water is added to mix into mud, after stirring for 3 hours, the mixed mud is flattened and dried into blocks, and processed into 300 mesh powder by a grinder to obtain a rare earth flame retardant. The lubricant is stearic acid, calcium stearate, zinc stearate, the external lubricant is PE wax; the antioxidant is 1010.

[0045] The present invention also discloses a method for preparing the above-mentioned environmentally friendly halogen-free flame-retardant PP floor, comprising the following steps:

[0046] (1) Weighing corresponding weight portions of each raw material, and preparing a PP substrate layer, a PP wear-resistant layer, and a PP balancing layer through twin-screw extrusion or internal mixing, calendering, pulling, cutting, and other processes;

[0047] (2) Hot pressing bonding: From top to bottom, there is the wear-resistant layer, color film, PP substrate and PP balance film, which are bonded by hot pressing using a press.

[0048] (3) UV heat treatment: UV paint coating weight 18g, speed 13m / min;

[0049] (4) Multi-blade saw slotting: The floorboards are neatly stacked on pallets and slotted with multiple saws according to the specifications;

[0050] (5) Standing: Ensure that the standing time is not less than 72 hours;

[0051] Product performance testing: Conduct qualification testing on finished products.

[0052] Set up comparative example 1-2

[0053] Comparative Example 1:

[0054] The other embodiments are the same as Example 3, except that there is no flame retardant in the PP wear-resistant layer and the PP balance layer, and the flame retardant in the PP bottom film and the PP substrate layer is also a common flame retardant single aluminum hydroxide flame retardant.

[0055] Comparative Example 2:

[0056] The other embodiments are the same as those in Example 3, except that the flame retardant in the PP base film and the PP substrate layer is also a common flame retardant, namely, red phosphorus flame retardant.

[0057] The performance of the finished flooring prepared in Example 3 and Comparative Example 1 was tested, and the specific performance indicators were flame retardancy, critical thermal radiation flux, and flame retardancy grade, and the test standard was ASTM648. The national standard flame retardancy grade test standard is GB8642;

[0058] The test results are shown in Table 1:

[0059] Table 1 Comprehensive performance test results of floor products of Example 3 and Comparative Examples 1-2

[0060] Test indicators Example 3 Comparative Example 1 Comparative Example 2 Self-extinguishing yes no yes Critical radiative heat flux 3.0 5.2 4.2 Flame retardant grade-E648 ClassI ClassII ClassI Smoke density 183 170 486 Flame retardant grade GB8642 B1 B2 B1 Surface smoothness excellent generally generally

[0061] It can be seen from the data in Table 1 that the halogen-free flame-retardant PP floor prepared in Example 3 of the present invention is superior to the floor of the comparative example in terms of self-extinguishing, critical radiant heat flux, flame retardant grade and smoke density. The rare earth flame retardant method of the present invention is used to produce very little smoke, and in the processing temperature range, the surface of the PP substrate is smoother due to the low aluminum hydroxide content.

Claims

1. An environmentally friendly halogen-free flame-retardant PP floor, characterized in that It includes a PP wear-resistant layer, a PP color film, a PP base material layer, and a PP balance layer, wherein the PP wear-resistant layer and the balance layer are prepared with the aid of a phosphorus-based flame retardant, and the PP base material layer is prepared with the aid of a rare earth flame retardant.

2. The environmentally friendly halogen-free flame-retardant PP floor according to claim 1, characterized in that: The phosphorus-based flame retardant used in the wear-resistant layer and the balance layer is specifically ammonium polyphosphate.

3. The environmentally friendly halogen-free flame-retardant PP floor according to claim 1 or 2, characterized in that The PP wear-resistant layer and the PP balancing layer specifically include the following components by weight: 70-100 parts of PP resin, 0-5 parts of PP elastomer, 0.2-1.0 parts of lubricant, 25-30 parts of flame retardant ammonium polyphosphate, 5-7 parts of carbonizing agent, 0.2-1.0 parts of antioxidant, and 0.1-0.5 parts of external lubricant.

4. The environmentally friendly halogen-free flame-retardant PP floor according to claim 3, characterized in that: The carbon-forming agent is a triazine carbon-forming agent.

5. The environmentally friendly halogen-free flame-retardant PP floor according to claim 1, characterized in that: The rare earth flame retardant used in the PP bottom film layer and the PP base material layer is specifically a mixture of phosphate rock rare earth ore and aluminum hydroxide.

6. The environmentally friendly halogen-free flame-retardant PP floor according to claim 5, characterized in that: The preparation method of the rare earth flame retardant is as follows: phosphate ore rare earth ore and aluminum hydroxide are uniformly mixed in a ratio of 1:4, water is added to mix into mud, after stirring for 2-3 hours, the mixed mud is flattened and dried into blocks, and processed into 300 mesh powder by a grinder to obtain the rare earth flame retardant.

7. The environmentally friendly halogen-free flame-retardant PP floor according to claim 1 or 6, characterized in that: The PP bottom sheet and PP base layer include the following components by weight: 30-50 parts of PP resin, 50-70 parts of PP elastomer, 200-250 parts of stone powder, 0.5-2.0 parts of lubricant, 250-300 parts of rare earth flame retardant, 0.5-1.0 parts of antioxidant, 1-4 parts of carbon black, and 0.1-0.5 parts of external lubricant.

8. The environmentally friendly halogen-free flame-retardant PP floor according to claim 3 or 6, characterized in that: The lubricant is stearic acid, calcium stearate, zinc stearate, and the external lubricant is PE wax.

9. The environmentally friendly halogen-free flame-retardant PP floor according to claim 3 or 6, characterized in that: The antioxidant is 1010.

10. A method for preparing an environmentally friendly halogen-free flame-retardant PP floor according to any one of claims 1 to 9, characterized in that The steps include: (1) Weighing corresponding weight portions of each raw material, and preparing a PP substrate layer, a PP wear-resistant layer, and a PP balancing layer through twin-screw extrusion or internal mixing, calendering, pulling, cutting, and other processes; (2) Hot pressing bonding: From top to bottom, there is the wear-resistant layer, color film, PP substrate and PP balance film, which are bonded by hot pressing using a press. (3) UV heat treatment: UV paint coating weight 15-20g, speed 10-15.5m / min; (4) Multi-blade saw slotting: The floorboards are neatly stacked on pallets and slotted with multiple saws according to the specifications; (5) Standing: Ensure that the standing time is not less than 72 hours; (6) Product performance testing: Conduct qualification testing on finished products.