Polyolefin substrate and waterproof roll material

Abstract

The present invention provides a polyolefin substrate and a waterproof roll, belonging to the field of polymer waterproofing. The present invention provides a polyolefin substrate, which includes the following raw materials by mass: 25-35 parts of linear low-density polyethylene; 35-45 parts of high-density polyethylene; 10-15 parts of polyolefin elastomer POE; 20-30 parts of metallocene polyethylene; 2-4 parts of white masterbatch; 2-3 parts of antioxidant. The polyolefin elastomer POE is a thermoplastic elastomer obtained by in-situ polymerization of ethylene and octene using a metallocene catalyst, has a very narrow molecular weight distribution, good heat resistance and fluidity, which gives the polyolefin substrate excellent heat resistance and fluidity, can adapt to a construction environment with a wide temperature range, and broadens the scope of use of the original product; and the polyolefin elastomer POE has no unsaturated double bonds in its structure, which also gives the polyolefin substrate excellent aging resistance.

Description

Technical Field

[0001] The invention relates to the field of polymer waterproofing, and in particular to a polyolefin substrate and a waterproofing roll. Background Art

[0002] Non-asphalt-based polymer self-adhesive waterproof membrane is a kind of multi-layer composite waterproof material with superior performance, which is mainly used for underground projects that need to be constructed by pre-laying method. It is mainly composed of polyolefin substrate, polymer self-adhesive film and surface particle protection layer. The post-poured concrete slowly cross-links and meshes with the self-adhesive layer of the membrane under the action of gravity, and physical adsorption and mortise and tenon effect occur during the cement curing process, so that the membrane and the post-poured concrete are firmly bonded together and not easy to separate.

[0003] Conventional non-asphalt-based polymer self-adhesive waterproofing membranes are suitable for room temperature because their base material is mainly polyethylene, and the mechanical properties of polyethylene materials decay significantly under high temperature environments, making them no longer suitable for construction conditions with higher rock temperatures. Therefore, it is necessary to improve their temperature resistance. Summary of the invention

[0004] The purpose of the present invention is to provide a polyolefin substrate and a waterproof roll material. The polyolefin substrate of the present invention has excellent high temperature resistance.

[0005] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0006] The present invention provides a polyolefin substrate, which comprises the following raw materials in parts by mass:

[0007] Linear low density polyethylene 25-35 parts;

[0008] 35-45 parts of high-density polyethylene;

[0009] Polyolefin elastomer POE 10~15 parts;

[0010] 20-30 parts of metallocene polyethylene;

[0011] 2~4 parts of white masterbatch;

[0012] 2~3 parts of antioxidant.

[0013] Preferably, at a heating temperature of 190° C. and an applied load of 2.16 kg, the melt index of the linear low-density polyethylene is 1.5 to 2.0 g / 10 min.

[0014] Preferably, at a heating temperature of 190 ° C and an applied load of 2.16 kg, the melt index of the high-density polyethylene is 0.15 ~ 1g / 10min;

[0015] The density of the high-density polyethylene is 0.93-0.95 g / m 3 .

[0016] Preferably, at a heating temperature of 190° C. and an applied load of 2.16 kg, the melt index of the polyolefin elastomer POE is 3.5 to 6.0 g / 10 min.

[0017] Preferably, at a heating temperature of 190° C. and an applied load of 2.16 kg, the melt index of the metallocene polyethylene is 0.2 to 1.0 g / 10 min;

[0018] The density of the metallocene polyethylene is 0.925-0.940 g / cm 3 .

[0019] Preferably, the white masterbatch comprises, by mass fraction, 40-50% titanium dioxide and the remainder polyethylene.

[0020] Preferably, the antioxidant includes one or more of antioxidant 1010, antioxidant 1076, distearyl thiodipropionate, antioxidant 2246 and antioxidant 264.

[0021] The present invention also provides a waterproof coiled material, comprising a first polyolefin substrate, a heat insulation layer, a second polyolefin substrate, a polymer self-adhesive film and a surface particle protection layer stacked in sequence;

[0022] The first polyolefin substrate and the second polyolefin substrate are independently the polyolefin substrates described in the above technical solution.

[0023] Preferably, the surface particle protection layer comprises reaction sand, and the particle size of the reaction sand is 30-70 meshes.

[0024] Preferably, the thickness of the polymer self-adhesive film is 0.25-0.40 mm;

[0025] The thickness of the first polyolefin substrate and the second polyolefin substrate are independently 0.4 to 0.5 mm.

[0026] Polyolefin elastomer POE is a thermoplastic elastomer obtained by in-situ polymerization of ethylene and octene using a metallocene catalyst. It has a very narrow molecular weight distribution, good heat resistance and fluidity, and gives the polyolefin substrate excellent heat resistance and fluidity, and can adapt to a construction environment with a wide temperature range, broadening the scope of use of the original product. In addition, the structure of polyolefin elastomer POE does not contain unsaturated double bonds, which also gives the polyolefin substrate excellent aging resistance. In addition, polyolefin elastomer POE also increases the flexibility of the polyolefin substrate, improves the hardness of the polyolefin substrate, facilitates construction, and improves the mechanical properties of the substrate.

[0027] Furthermore, the waterproof roll material of the present invention uses a sandwich structure of a first polyolefin substrate + an aluminum silicate needle-punched geotextile + a second polyolefin substrate to ensure a double-layer waterproof effect. The aluminum silicate needle-punched geotextile can not only play a heat insulating role but also a buffering role. When damaged by external force and sharp objects, even if one layer of the heat-resistant waterproof layer is damaged, the product still has a waterproof effect. DETAILED DESCRIPTION

[0028] The present invention provides a polyolefin substrate, which comprises the following raw materials in parts by mass:

[0029] Linear low density polyethylene 25-35 parts;

[0030] 35-45 parts of high-density polyethylene;

[0031] Polyolefin elastomer POE 10~15 parts;

[0032] 20-30 parts of metallocene polyethylene;

[0033] 2~4 parts of white masterbatch;

[0034] 2~3 parts of antioxidant.

[0035] In parts by mass, the raw material of the polyolefin substrate includes 25 to 35 parts of linear low-density polyethylene, preferably 28 to 32 parts, and more preferably 29 to 30 parts;

[0036] In the present invention, at a heating temperature of 190° C. and an applied load of 2.16 kg, the melt index of the linear low-density polyethylene is preferably 1.5-2.0 g / 10 min, more preferably 1.6-1.8 g / 10 min; the linear low-density polyethylene preferably includes Daqing Petrochemical 9047.

[0037] Based on the mass fraction of the linear low-density polyethylene, the raw material of the polyolefin substrate includes 35 to 45 parts of high-density polyethylene, preferably 36 to 40 parts;

[0038] In the present invention, at a heating temperature of 190°C and an applied load of 2.16 kg, the melt index of the high-density polyethylene is preferably 0.15 to 1 g / 10 min, more preferably 0.2 to 0.8 g / 10 min, and further preferably 0.4 to 0.6 g / 10 min; the density of the high-density polyethylene is preferably 0.93 to 0.95 g / m 3 , more preferably 0.946 g / m 3 The high-density polyethylene preferably includes TR-144 from Qatar Petrochemical, which has good toughness and processing properties.

[0039] Based on the mass fraction of the linear low-density polyethylene, the raw material of the polyolefin substrate includes 10 to 15 parts of polyolefin elastomer POE, preferably 12 to 14 parts;

[0040] In the present invention, at a heating temperature of 190°C and an applied load of 2.16 kg, the melt index of the polyolefin elastomer POE is preferably 3.5-6.0 g / 10 min, more preferably 5.0 g / 10 min; the polyolefin elastomer POE preferably includes Basic Innovative Plastics (Korea) 8570D. The polyolefin elastomer POE is a thermoplastic elastomer that is polymerized in situ with ethylene and octene using a metallocene catalyst, has a very narrow molecular weight distribution, and is endowed with excellent heat resistance and fluidity. There is no unsaturated double bond in its structure, and it has excellent aging resistance.

[0041] Based on the mass fraction of the linear low-density polyethylene, the raw material of the polyolefin substrate includes 20 to 30 parts of metallocene polyethylene, more preferably 25 to 28 parts;

[0042] In the present invention, at a heating temperature of 190° C. and an applied load of 2.16 kg, the melt index of the metallocene polyethylene is preferably 0.2 to 1.0 g / 10 min, more preferably 0.4 to 0.8 g / 10 min, and further preferably 0.5 to 0.6 g / 10 min;

[0043] The density of the metallocene polyethylene is preferably 0.925-0.940 g / cm 3 , more preferably 0.937 g / cm 3 ;

[0044] In the present invention, the metallocene polyethylene preferably includes Korean Lotte P2460. Metallocene polyethylene has mechanical properties superior to polyethylene and can improve the processing and extrusion process of polyethylene.

[0045] In the present invention, based on the mass fraction of the linear low-density polyethylene, the raw material of the polyolefin substrate includes 2 to 4 parts of white masterbatch, and more preferably 2.5 to 3 parts.

[0046] In the present invention, the components of the white masterbatch are preferably 40-50% titanium dioxide and the balance polyethylene, by mass fraction. Titanium dioxide can improve the heat resistance of the system, thereby extending its life.

[0047] In the present invention, the preparation method of the white masterbatch preferably includes granulation. The present invention has no special limitation on the granulation, and the technical scheme well known to those skilled in the art can be adopted.

[0048] Based on the mass fraction of the linear low-density polyethylene, the raw material of the polyolefin substrate includes 2 to 3 parts of antioxidant, preferably 2.5 to 2.8 parts;

[0049] In the present invention, the antioxidant preferably includes one or more of antioxidant 1010, antioxidant 1076, distearyl thiodipropionate, antioxidant 2246 and antioxidant 264.

[0050] The present invention has no particular limitation on the preparation method of the polyolefin substrate, and any method well known to those skilled in the art may be used.

[0051] The present invention also provides a waterproof coiled material, comprising a first polyolefin substrate, a heat insulation layer, a second polyolefin substrate, a polymer self-adhesive film and a surface particle protection layer stacked in sequence;

[0052] The first polyolefin substrate and the second polyolefin substrate are independently the polyolefin substrates described in the above technical solution.

[0053] In the present invention, the waterproof coiled material comprises a first polyolefin substrate; the thickness of the first polyolefin substrate is preferably 0.4-0.5 mm;

[0054] In the present invention, the waterproof roll material comprises a heat-insulating layer attached to the surface of the first polyolefin substrate; the thickness of the heat-insulating layer is preferably 0.1-0.2 mm; the heat-insulating layer preferably comprises an aluminum silicate needle-punched geotextile; the gram weight of the aluminum silicate needle-punched geotextile is preferably 120-150 g / m 2 ;

[0055] In the present invention, the waterproof coiled material comprises a second polyolefin substrate attached to the surface of the thermal insulation layer; the thickness of the second polyolefin substrate is preferably 0.4-0.5 mm;

[0056] In the present invention, the waterproof roll material includes a polymer self-adhesive film attached to the surface of the second polyolefin substrate; the thickness of the polymer self-adhesive film is preferably 0.25~0.4mm; the polymer self-adhesive film is preferably free of slippage, dripping and flowing at a temperature of 80°C for 2 hours; the raw material of the polymer self-adhesive film preferably includes hot melt adhesive.

[0057] In the present invention, the waterproof coiled material comprises a surface particle protection layer attached to the polymer self-adhesive film; the composition of the surface particle protection layer preferably comprises reactive sand, and the particle size of the reactive sand is preferably 30-70 meshes.

[0058] In the present invention, the method for preparing the waterproof coiled material preferably comprises the following steps:

[0059] The raw materials of the first polyolefin substrate and the second polyolefin substrate are mixed and extruded respectively, and the obtained first melt and the second melt are compounded with the heat insulation layer to obtain the substrate;

[0060] Coating a polymer self-adhesive adhesive on the surface of the substrate to form a polymer self-adhesive film;

[0061] The raw material of the surface particle protection layer is coated on the polymer self-adhesive film to form the surface particle protection layer, thereby obtaining the waterproof coiled material.

[0062] The present invention mixes the raw materials of the first polyolefin substrate and the second polyolefin substrate and extrude them separately, and composites the obtained first melt and the second melt with the heat insulation layer to obtain the substrate.

[0063] In the present invention, the mixing is preferably carried out under stirring conditions, and the mixing time is preferably 3 to 5 minutes;

[0064] In the present invention, the extrusion is preferably carried out in a single-screw extruder; the aspect ratio of the screw of the single-screw extruder is preferably 30; the temperature of the screw feed section of the single-screw extruder is preferably 160-170°C, the temperature of the screw compression section is preferably 180-195°C, the temperature of the screw homogenization section is preferably 205-220°C, the temperature of the screen changer is preferably 200-215°C, the temperature of the gear pump is preferably 200-215°C, and the temperature of the flow channel is preferably 200-215°C.

[0065] In the present invention, the metering pump frequency of the screw is preferably 15 to 20 Hz, more preferably 16 to 18 Hz.

[0066] In the present invention, the roller die frequency during extrusion is preferably 8-11 Hz, and the pulling frequency is preferably 22-27 Hz; the extrusion die temperature for extrusion is preferably 195-210°C, more preferably 200-205°C.

[0067] In the present invention, the compounding method preferably includes rolling; the pressure between the rollers during the rolling is preferably 0.03-0.04 MPa, and the temperature of the cooling roller is preferably 45-55°C.

[0068] After the lamination is completed, the present invention preferably rolls up the obtained substrate via a guide roller.

[0069] After obtaining the substrate, the present invention coats the surface of the substrate with a polymer self-adhesive to form a polymer self-adhesive film.

[0070] In the present invention, the coating method preferably includes spraying; during the spraying, the polymer self-adhesive is preferably placed in a glue box; the frequency of the glue pump in the glue box is preferably 6~8Hz; the temperature of the glue box is preferably 160~180℃, and the temperature of the rubber hose connected to the glue box is preferably 155~165℃; the temperature of the die head connected to the other end of the rubber hose is preferably 145~155℃.

[0071] After the polymer self-adhesive film is formed, the present invention coats the raw material of the surface particle protection layer on the polymer self-adhesive film to form the surface particle protection layer.

[0072] In the present invention, after the particles are coated, the resulting coil is preferably passed through a roller. The present invention has no particular limitation on the coating, as long as the particles fully cover the polymer self-adhesive film.

[0073] In the present invention, the pressure of the roller is preferably 0.02-0.03 MPa.

[0074] The polyolefin substrate and waterproof coiled material provided by the present invention are described in detail below in conjunction with the embodiments, but they should not be construed as limiting the protection scope of the present invention.

[0075] In the embodiments and comparative examples, the linear low-density polyethylene is Daqing Petrochemical 9047; the high-density polyethylene HDPE is Qatar Petrochemical TR-144; the polyolefin elastomer POE is based on Innovative Plastics (Korea) 8570D; and the metallocene polyethylene is Lotte P2460 from Korea.

[0076] The white masterbatch was purchased from Xiongxian Yikuo Plastic Products Co., Ltd. as 0805.

[0077] The thermal insulation layer is aluminum silicate needle-punched geotextile.

[0078] The hot melt adhesive is FS-1600C from Kunshan Jiuqing New Material Technology Co., Ltd.

[0079] The reaction sand is the isolation reaction sand of Beijing Hualin Ruisi Technology Development Co., Ltd., with a mesh size of 30~70 meshes.

[0080] Example 1

[0081] 25 parts by weight of linear low density polyethylene

[0082] High-density polyethylene 45 parts by weight

[0083] Polyolefin elastomer POE 10 parts by weight

[0084] 25 parts by weight of metallocene polyethylene

[0085] 2 parts by weight of white masterbatch

[0086] Antioxidant 1010 3 parts by weight

[0087] The raw materials of the two heat-resistant and waterproof layers enter the mixing bin through self-service suction machines respectively. After stirring, they are sucked into the storage tank by the vacuum feeder. The stirring time is 5 minutes.

[0088] The screw temperature is set as follows: 170°C for the feed section, 195°C for the compression section, 220°C for the homogenization section, 215°C for the screen changer, 215°C for the gear pump, and 215°C for the flow channel. The screw metering pump is 15Hz, the roller die frequency is 8Hz, and the traction frequency is 22Hz.

[0089] The temperature of the extrusion die is 210℃. After the two melts are extruded through the die head (the gap is 0.35mm), the two melts and the insulation layer (the thickness of the geotextile is 0.1mm and the unit area mass is 120g / m 2 ) enters the cooling roller, the pressure between the rollers is 0.04MPa, the temperature of the cooling roller is set to 55°C, and the thickness of the heat-resistant and waterproof layers (i.e., the first polyolefin substrate and the second polyolefin substrate) are 0.4mm respectively.

[0090] The temperature of the glue box was set to 180°C, the temperature of the glue hose was set to 165°C, the temperature of the glue coating die was set to 155°C, and the glue pump was set to 6Hz to obtain a polymer self-adhesive film with a thickness of 0.25mm.

[0091] After being coated with a single layer of sand, the material is passed through a roller with a roller pressure of 0.03 MPa to obtain a waterproof membrane.

[0092] Example 2

[0093] 35 parts by weight of linear low density polyethylene

[0094] High-density polyethylene 35 parts by weight

[0095] Polyolefin elastomer POE 15 parts by weight

[0096] 30 parts by weight of metallocene polyethylene

[0097] White masterbatch 3 parts by weight

[0098] Antioxidant 1010 2 parts by weight

[0099] The raw materials of the two heat-resistant and waterproof layers enter the mixing bin through self-service suction machines respectively. After stirring, they are sucked into the storage tank by the vacuum feeder. The stirring time is 3 minutes.

[0100] The screw temperature was set to: 160°C for the feed section, 180°C for the compression section, 205°C for the homogenization section, 200°C for the screen changer, 200°C for the gear pump, and 200°C for the flow channel. The screw metering pump was 20Hz, the roller die frequency was 11Hz, and the traction frequency was 27Hz.

[0101] The extrusion die temperature is 195℃. After the two melts are extruded through the die head (gap is 0.35mm), they are combined with the two melts and the insulation layer (geotextile thickness is 0.15mm, unit area mass is 135g / m 2 ) enters the cooling roller, the pressure between the rollers is 0.03MPa, the temperature of the cooling roller is set to 45°C, and the thickness of the heat-resistant and waterproof layer (i.e., the first polyolefin substrate and the second polyolefin substrate) are 0.4mm respectively.

[0102] The temperature of the glue box was set to 170°C, the temperature of the glue hose was set to 160°C, the temperature of the glue coating die was set to 150°C, and the glue pump was set to 7Hz to obtain a polymer self-adhesive film with a thickness of 0.3 mm.

[0103] After being coated with a single layer of sand, the material is passed through a roller with a roller pressure of 0.02MPa to obtain a waterproof membrane.

[0104] Example 3

[0105] 30 parts by weight of linear low density polyethylene

[0106] 40 parts by weight of high density polyethylene

[0107] Polyolefin elastomer POE 13 parts by weight

[0108] 20 parts by weight of metallocene polyethylene

[0109] White masterbatch 4 parts by weight

[0110] Antioxidant 1010 2.5 parts by weight

[0111] The raw materials of the two heat-resistant and waterproof layers enter the mixing bin through self-service suction machines respectively. After stirring, they are sucked into the storage tank by the vacuum feeder. The stirring time is 4 minutes.

[0112] The screw temperature settings are: feed section 165°C, compression section 190°C, homogenization section 210°C, screen changer 210°C, gear pump 210°C, flow channel 210°C. The screw metering pump is 17Hz, the roller die frequency is 9Hz, and the traction frequency is 24Hz.

[0113] The extrusion die temperature is 205℃. After the two melts are extruded through the die head (gap is 0.45mm), the two melts and the insulation layer (geotextile thickness is 0.2mm, unit area mass is 150g / m 2 ) enters the cooling roller, the pressure between the rollers is 0.03MPa, the temperature of the cooling roller is set to 50℃, and the thickness of the heat-resistant and waterproof layer (i.e. the first polyolefin substrate and the second polyolefin substrate) are 0.5mm respectively.

[0114] The temperature of the glue box was set to 160°C, the temperature of the glue hose was set to 155°C, the temperature of the glue coating die was set to 145°C, and the glue pump was set to 8Hz to obtain a polymer self-adhesive film with a thickness of 0.35 mm.

[0115] After being coated with a single layer of sand, the material is passed through a roller with a pressure of 0.04 MPa to obtain a waterproof membrane.

[0116] Comparative Example 1

[0117] 30 parts by weight of linear low density polyethylene

[0118] 40 parts by weight of high density polyethylene

[0119] 20 parts by weight of metallocene polyethylene

[0120] White masterbatch 4 parts by weight

[0121] Antioxidant 1010 2.5 parts by weight

[0122] The thermal insulation layer and process parameters are consistent with those in Example 3.

[0123] Comparative Example 2

[0124] 50 parts by weight of linear low density polyethylene

[0125] 40 parts by weight of high density polyethylene

[0126] White masterbatch 4 parts by weight

[0127] Antioxidant 1010 2.5 parts by weight

[0128] The raw materials enter the mixing bin through a self-service suction machine, and after stirring, they are sucked into the storage tank by a vacuum feeder. The stirring time is 4 minutes.

[0129] The screw temperature is set as follows: 165°C for the feed section, 190°C for the compression section, 210°C for the homogenization section, 210°C for the screen changer, 210°C for the gear pump, and 210°C for the flow channel. The screw metering pump is 17Hz, the roller die frequency is 9Hz, and the traction frequency is 24Hz. The extrusion die temperature is 205°C.

[0130] After being extruded through the die head, the melt enters the cooling roller. The pressure between the rollers is 0.03 MPa. The temperature of the cooling roller is set to 50°C. The thickness of the temperature-resistant and waterproof layer (ie, the first polyolefin substrate and the second polyolefin substrate) is 1.0 mm.

[0131] The temperature of the glue box was set to 160°C, the temperature of the glue hose was set to 155°C, the temperature of the glue coating die was set to 145°C, and the glue pump was set to 8Hz to obtain a polymer self-adhesive film with a thickness of 0.35 mm.

[0132] After being coated with a single layer of sand, the material is passed through a roller with a pressure of 0.04 MPa to obtain a waterproof membrane.

[0133] Comparative Example 3

[0134] 70 parts by weight of linear low density polyethylene

[0135] Polyolefin elastomer POE 13 parts by weight

[0136] 20 parts by weight of metallocene polyethylene

[0137] White masterbatch 4 parts by weight

[0138] Antioxidant 1010 2.5 parts by weight

[0139] The thermal insulation layer and process parameters are consistent with those in Example 3.

[0140] Mechanical properties testing

[0141] Examples 1, 2, 3 and Comparative Examples 1, 2, 3 were sampled and tested for physical properties in accordance with the provisions of GB / T23457-2017, and the results are shown in Table 1. The tensile strength and elongation at break of the film were tested in accordance with the provisions of GB / T328.9-2007, and the stretching speed was (250±50) mm / min; the puncture resistance was tested in accordance with Appendix B of CJ / T 234-2006; the high-temperature tensile strength, puncture resistance and water impermeability at 40°C, 60°C and 70°C were tested after preheating at the specified temperature for 1 hour.

[0142] Table 1 Physical properties test results

[0143]

[0144] It can be seen from the above table that the longitudinal tensile strength at break of the high temperature resistant waterproof material provided by the present invention is above 27.5MPa at 23°C, above 25.4MPa at 40°C, above 21.8MPa at 60°C, and above 18.8MPa at 70°C; the transverse tensile strength at break is above 27.2MPa at 23°C, 24.5MPa at 40°C, above 20.3MPa at 60°C, and above 17.2MPa at 70°C; the longitudinal elongation at break is above 737% at 23°C, 24.5 .... ℃ is above 902%, 60℃ is above 982%, 70℃ is above 1062%; transverse elongation at break is above 710% at 23℃, above 984% at 40℃, above 1040% at 60℃, and above 1100% at 70℃; puncture resistance is above 550N at 23℃, above 470N at 40℃, above 390N at 60℃, and above 326N at 70℃; water impermeability under the test environment of 23℃, 40℃, 60℃, and 70℃ all meets the requirement of no leakage. It shows that the heat-resistant polymer self-adhesive waterproof membrane provided by the present invention still maintains excellent mechanical properties at high temperatures.

[0145] Comparative Examples 1 and 2 do not add POE. It can be seen from the table that the tensile properties decrease more. This is because the low-density polyethylene has more short branches, the molecular motion is active at high temperatures, and the intermolecular force is reduced. The decay rate of Comparative Example 1 is smaller than that of Comparative Example 2, mainly because the addition of metallocene polyethylene reduces the decay rate. Metallocene polyethylene has polar groups, and high temperature has relatively little effect on its molecular motion. Compared with Example 3, Comparative Example 3 does not add high-density polyethylene TR144, and the tensile strength decay rate is slightly faster, mainly because the high-density polyethylene molecular branches are less than low-density polyethylene, and the molecular structure is more regular, and the temperature resistance is better than low-density polyethylene.

[0146] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A waterproof roll material, characterized in that: It includes a first polyolefin substrate, a heat insulation layer, a second polyolefin substrate, a polymer self-adhesive film and a surface particle protection layer stacked in sequence; In terms of mass fractions, the raw materials of the first polyolefin substrate and the second polyolefin substrate are independently: Linear low density polyethylene 25-35 parts; 35-45 parts of high-density polyethylene; Polyolefin elastomer POE 10~15 parts; 20-30 parts of metallocene polyethylene; 2~4 parts of white masterbatch; 2~3 parts of antioxidant; The linear low-density polyethylene has a melt index of 1.5 to 2.0 g / 10 min at a heating temperature of 190° C. and an applied load of 2.16 kg; The high-density polyethylene has a melt index of 0.15 to 1 g / 10 min at a heating temperature of 190° C. and an applied load of 2.16 kg; The density of the high-density polyethylene is 0.93-0.95 g / m 3 ; The polyolefin elastomer POE has a melt index of 3.5 to 6.0 g / 10 min at a heating temperature of 190° C. and an applied load of 2.16 kg; The metallocene polyethylene has a melt index of 0.2 to 1.0 g / 10 min at a heating temperature of 190° C. and an applied load of 2.16 kg; The density of the metallocene polyethylene is 0.925-0.940 g / cm 3 .

2. The waterproof coiled material according to claim 1, characterized in that: In terms of mass fraction, the components of the white masterbatch are 40-50% of titanium dioxide and the balance of polyethylene.

3. The waterproof coiled material according to claim 1, characterized in that: The antioxidant includes one or more of antioxidant 1010 , antioxidant 1076 , distearyl thiodipropionate, antioxidant 2246 and antioxidant 264 .

4. The waterproof coiled material according to claim 1, characterized in that: The surface particle protection layer comprises reaction sand, and the particle size of the reaction sand is 30-70 meshes.

5. The waterproof coiled material according to claim 1, characterized in that: The thickness of the polymer self-adhesive film is 0.25-0.40 mm; The thickness of the first polyolefin substrate and the second polyolefin substrate are independently 0.4 to 0.5 mm.

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