CN105199181A - Light flame-retardant thermoplastic polyolefin waterproof rolled material and preparation method thereof - Google Patents

Light flame-retardant thermoplastic polyolefin waterproof rolled material and preparation method thereof Download PDF

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Publication number
CN105199181A
CN105199181A CN201510640226.2A CN201510640226A CN105199181A CN 105199181 A CN105199181 A CN 105199181A CN 201510640226 A CN201510640226 A CN 201510640226A CN 105199181 A CN105199181 A CN 105199181A
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tpo
retardant
coiled material
parts
flame
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韩忠强
段文锋
田凤兰
谢少波
丁丹鹏
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Beijing Oriental Yuhong Waterproof Technology Co Ltd
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Beijing Oriental Yuhong Waterproof Technology Co Ltd
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Priority to CN201510640226.2A priority Critical patent/CN105199181A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
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    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
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    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
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    • B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
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Abstract

The invention provides a light flame-retardant thermoplastic polyolefin waterproof rolled material and a preparation method thereof. The light flame-retardant thermoplastic polyolefin waterproof rolled material is a homogeneous type TPO (thermoplastic polyolefin) waterproof rolled material of a single-layered flame-retardant TPO rolled material layer or a reinforced TPO waterproof rolled material which comprises a flame-retardant TPO surface layer but does not comprise a TPO bottom surface layer or a middle gridding cloth enhancement layer structure. The formula of the flame-retardant TPO rolled material layer or surface layer consists of the following raw materials in part by weight: 100 parts of TPO resin, 5-25 parts of hollow microspheres, 5-50 parts of halogen-free flame retardant, 0.01-3 parts of antioxidant, 0.01-3 parts of ultraviolet stabilizers and 1-8 parts of a pigment pack. The invention also provides the preparation method of the light flame-retardant thermoplastic polyolefin waterproof rolled material. The light flame-retardant thermoplastic polyolefin waterproof rolled material has the advantages of environmental protection, lightweight, high efficiency and flame retardancy. Preparation operation is simple and convenient, and cost is low.

Description

A kind of light flame-retardant thermoplastic polyolefin water-proof coiled material and preparation method thereof
Technical field
The present invention relates to a kind of flame-retardant high-molecular waterproof roll and preparation method, be specifically related to a kind of light flame-retardant thermoplastic polyolefin water-proof coiled material and preparation method.
Background technology
TPO (TPO) waterproof roll is a kind of novel high polymer waterproof roll developed rapidly in recent years, single ply waterproofing coiled material is adopted directly to expose use, there is the plurality of advantages such as green, environmental protection and low application life cost, being mainly used in the waterproof protective of industrial premises flat roof deck, is the first-selection of single storey industry workshop water proof roofing sheet.Current, along with the raising of Building Fire Protection awareness of safety, and GB50016-2014 " Code for fire protection design of buildings " is to the new demand of industrial premises Roof system fire protection design, the fire retardancy of exploitation and raising TPO waterproof roll becomes the direction of following TPO coiled material research and development.
At present, adding the fire retardant adapted to is the most effective technical way improving TPO waterproof roll flame retardant properties, and additive flame retardant conventional in TPO coiled material is composite inorganic based flame retardant or composite inorganic class, halogen family based flame retardant.Wherein, composite inorganic based flame retardant does not produce cracking when equipment is had to corrosive material and burns and generates inorganic high-temp residue in the course of processing, is conducive to the heat-resisting ability improving charring layer.But, this based flame retardant must (>50phr) competence exertion is good when high addition flame retardant properties, and easily cause goods mechanical strength and unit elongation significantly to reduce, density significantly raises, this just means that the load-bearing load of building roof framework increases, and also improves construction cost and production cost; In addition, composition metal based flame retardant preparation process is complicated, and cost is high.For composite inorganic class, halogen family based flame retardant, be faced with the problem that extrudate density is higher equally, and, what worse is that it produces a large amount of toxic gases in combustion, feature of environmental protection extreme difference, and known according to investigation, loss of life and personal injury a large amount of in fire is that the toxic gas owing to producing in product burns process causes.Such as, prior art CN201410662979.9 discloses a kind of flame retarded thermoplastic's coiled water-proof polyolefine material, composite flame-retardant agent is made up of TDE, magnesium hydroxide, antimonous oxide, zinc borate, this invention flame-retardant system not environmentally, discharge a large amount of toxic gas in combustion processes, is the flame-retardant system generally do not adopted.Equally, this system is also faced with the larger problem of density.Therefore, develop a kind of environmental protection, lightweight, highly effective flame-retardant type TPO waterproof roll be the technical barrier that need solve.
Summary of the invention
Technical problem to be solved by this invention is, provides a kind of environmental protection, lightweight, highly effective flame-retardant TPO waterproof roll and preparation method easy and simple to handle, with low cost thereof.
The technical scheme that the present invention solves the employing of its technical problem is, a kind of light flame-retardant thermoplastic polyolefin water-proof coiled material, for the homogeneous pattern TPO waterproof roll of individual layer fire-retardant TPO coiled material layer or containing fire-retardant TPO upper layer, not containing the enhancement type TPO waterproof roll of fire-retardant TPO bottom surface layer and intermediate mesh cloth enhancement layer structure; Wherein, the formula of fire-retardant TPO coiled material layer or upper layer is made up of the raw material of following parts by weight: TPO resin 100 parts, hollow microsphere 5 ~ 25 parts (preferably 10 ~ 20 parts), halogen-free flame retardants 5 ~ 50 parts (preferred 10-15 part), filler 0 ~ 20 part (preferably 5 ~ 10 parts), 0.01 ~ 3 part, oxidation inhibitor (preferably 0.3 part), UV light stabilizing agent 0.01 ~ 3 part (preferably 0.5 part), pigment bag 1 ~ 8 part (preferably 4 parts).
Further, described hollow microsphere is have the sphere material of thin-wall case hollow structure (preferred diameter is phenolic aldehyde hollow microsphere, hollow glass microballoon, polyimide hollow microsphere or the hollow silica microsphere of 100nm ~ 20 μm.More preferably the diameter of chemical grafting treated, Surface coating, surperficial coupling processing is phenolic aldehyde hollow microsphere, hollow glass microballoon, polyimide hollow microsphere or the hollow silica microsphere of 100nm ~ 20 μm).
Further, described TPO is the reactor polymeric thermoplastic polyolefine (Hifax of preferred Li Ande Basel tMseries of elastic body) or mechanical blending type TPO (being preferably made up of polypropylene, Thermoplastic Elastomer, Olefinic).
Further, described halogen-free flame retardants is magnesium hydroxide, ammonium polyphosphate or silicon-nitrogen composite combustion inhibitor.
Further, described pigment bag is a kind of and multiple mixture in titanium dioxide, carbon black, ferric oxide, Prussian blue, lead silicate, monoazo, tetrazo, Tai Celadon.
The effect of oxidation inhibitor is the processing characteristics improving TPO coiled material, is preferably antioxidant 1010; The effect of UV light stabilizing agent is the weather resistance improving TPO coiled material, and preferred UV light stabilizing agent is 850.
The technical scheme that the present invention solves the employing of its technical problem is further, a kind of preparation method of light flame-retardant thermoplastic polyolefin water-proof coiled material, and the preparation of described homogeneous pattern TPO waterproof roll comprises the following steps:
(1) first all granulating formula starting material are mixed by the preparation of TPO compound material master batch: according to TPO coiled material granulating formula in mixing equipment; Then utilize whipping device to be transported in twin screw extruder granulating equipment the compound material mixed, extrude, draw, cool, granulation, oven dry, collection; Wherein, the barrels set temperature of twin screw extruder is 165 DEG C ~ 230 DEG C, and pelletizing speed is 100 revs/min ~ 400 revs/min;
(2) preparation of homogeneous pattern TPO waterproof roll: in twin screw extruder, the TPO compound material master batch of acquisition is directly extruded, barrel zone temperature is 165 DEG C ~ 230 DEG C, main frame screw rod rotating speed is 100 revs/min ~ 400 revs/min, and through smoother roller calendering, with after through cooling, correction, trimming, cutting, rolling, packaging, homogeneous pattern TPO coiled material;
The preparation of described enhancement type TPO waterproof roll: adopt forcing machine to extrude respectively on TPO coiled material surface layer and TPO coiled material bottom surface layer, wherein, bottom surface layer elder generation and grid cloth are in three rolling smooth roll hot pressing compounds, with after through cooling after enter another three rollings smooth roll and TPO upper layer hot pressing compound, with after be prepared into enhancement type TPO coiled material through cooling, correction, trimming, cutting, rolling, packaging; Wherein, sheet extruder temperature 160 DEG C ~ 240 DEG C, rotating speed is 100 revs/min ~ 500 revs/min.
The efficient and light weight fire-retardant TPO waterproof coiled material of the present invention, by introducing the hollow microsphere material of special hollow structure, utilizing its Ultralight characteristic on the one hand, still having lower density when fire retardant height addition, thus reduce the density of fire-retardant TPO coiled material; Its hollow heat insulation layer formed at material internal is utilized to slow down the transfer rate of outside heat to material internal on the other hand, simultaneously, self also has higher high thermal resistance, and formed dual fire-retardant " barrier " with fire retardant, internal heat energy when not only reducing material combustion, and also there is function of heat insulation when applying.Product of the present invention has the advantage of environmental protection, lightweight, highly effective flame-retardant; And preparation manipulation is easy, cost is low.
Accompanying drawing explanation
Fig. 1 is homogeneous pattern TPO waterproof roll.
Fig. 2 is enhancement type TPO waterproof roll (21 is TPO coiled material surface layer, and 22 is polyester graticule cloth enhancement layer, and 23 is TPO coiled material bottom surface layer).
Specific implementation method
Following instance is only in order to explanation and unrestricted technical scheme described in the invention, and all do not depart from technical scheme and the improvement thereof of spirit and scope, and it all should be encompassed within right of the present invention.
Embodiment 1: the preparation of light flame-retardant TPO waterproof roll
1, the formula of light flame-retardant TPO waterproof roll is made by the raw material of following parts by weight:
TPO resin: full aggretion type TPO resin, 100 parts
Hollow microsphere: hollow silica microsphere, 10 parts
Halogen-free flame retardants: ammonium polyphosphate, 10 parts
Filler: calcium carbonate, 5 parts
Oxidation inhibitor: antioxidant 1010,0.3 part
UV light stabilizing agent: photostabilizer 850,0.5 part
Pigment bag: titanium dioxide, 4 parts
2, the preparation of light flame-retardant TPO waterproof roll
(1) hollow microsphere surface preparation: adopt conventional chemical grafting treated, Surface coating or surperficial coupling processing, obtains the diameter 100nm ~ 20 μm hollow silica microsphere of modifying.
(2) TPO compound material master batch preparation: according to TPO coiled material granulating formula, first all granulating formula starting material are mixed in mixing equipment; Then utilize whipping device to be transported in twin screw extruder granulating equipment the compound material mixed, extrude, draw, cool, granulation, oven dry, collection; Wherein, the barrels set temperature of twin screw extruder is 165 DEG C ~ 190 DEG C, and pelletizing speed is 250 revs/min.
(3) preparation of homogeneous pattern TPO waterproof roll: the TPO compound material master batch will obtained in twin screw extruder, directly to extrude and through three rolling smooth calendered, with after be prepared into through cooling, correction, trimming, cutting, rolling, packaging the homogeneous pattern TPO coiled material that thickness is 1.0mm-2.5mm; Wherein, barrel zone temperature is 165 DEG C ~ 190 DEG C, and main-machine screw rotating speed is 350 revs/min.
Embodiment 2: the preparation of light flame-retardant TPO waterproof roll
1, the formula of light flame-retardant TPO waterproof roll is made by the raw material of following parts by weight:
TPO resin: mechanically mixing type TPO (polypropylene/polypropylene elastomerics is 30/70), 100 parts
Hollow microsphere: hollow polyimide microsphere, 20 parts
Halogen-free flame retardants: ammonium polyphosphate, 10 parts
Filler: calcium carbonate, 0 part
Oxidation inhibitor: antioxidant 1010,0.3 part
UV light stabilizing agent: photostabilizer 850,0.5 part
Pigment bag: titanium dioxide, 4 parts
2, the preparation of light flame-retardant TPO waterproof roll, is with the difference of embodiment 1, and step (1) obtains the diameter 100nm ~ 20 μm hollow polyimide microsphere modified.
Embodiment 3: the preparation of light flame-retardant TPO waterproof roll
1, the formula of light flame-retardant TPO waterproof roll upper layer is made by the raw material of following parts by weight:
TPO resin: full aggretion type TPO resin, 100 parts
Hollow microsphere: hollow glass microballoon, 25 parts
Halogen-free flame retardants: magnesium hydroxide, 10 parts
Filler: calcium carbonate, 10 parts
Oxidation inhibitor: antioxidant 1010,0.3 part
UV light stabilizing agent: photostabilizer 850,0.5 part
Pigment bag: titanium dioxide, 4 parts
2, the formula of light flame-retardant TPO waterproof roll bottom surface layer is made by the raw material of following parts by weight:
TPO resin: mechanical blending type TPO resin (polypropylene/thermoplastic elastomer is 30/70), 100 parts
Halogen-free flame retardants: 0 part
Filler: calcium carbonate, 20 parts
Oxidation inhibitor: antioxidant 1010,0.3 part
UV light stabilizing agent: photostabilizer 850,0.5 part
Pigment bag: titanium dioxide, 4 parts
3, the preparation of light flame-retardant TPO waterproof roll
(1) hollow microsphere surface preparation: adopt conventional chemical grafting treated, Surface coating or surperficial coupling processing, obtains the diameter 100nm ~ 20 μm hollow glass microballoon modified.
(2) first all granulating formula starting material are mixed by the preparation of TPO compound material master batch: according to TPO coiled material granulating formula in mixing equipment; Then utilize whipping device to be transported in twin screw extruder granulating equipment the compound material mixed, extrude, draw, cool, granulation, oven dry, collection; Wherein, the barrels set temperature of twin screw extruder is 165 DEG C ~ 190 DEG C, and pelletizing speed is 250 revs/min.
(3) preparation of enhancement type TPO waterproof roll: adopt forcing machine to extrude according to the preparation of homogeneous pattern TPO waterproof roll respectively on TPO coiled material surface layer and TPO coiled material bottom surface layer, wherein, bottom surface layer elder generation and grid cloth are in three rolling smooth roll hot pressing compounds, with after through cooling after enter another three rollings smooth roll and TPO upper layer hot pressing compound, with after be prepared into through cooling, correction, trimming, cutting, rolling, packaging the enhancement type TPO coiled material that thickness is 1.0mm-2.5mm.Wherein, sheet extruder temperature 160 DEG C ~ 240 DEG C, rotating speed is 100 revs/min ~ 500 revs/min.
Embodiment 4: the preparation of light flame-retardant TPO waterproof roll
1, the formula of light flame-retardant TPO waterproof roll is made by the raw material of following parts by weight:
TPO resin: full aggretion type TPO resin, 100 parts
Hollow microsphere: Hollow Phenolic Micro-Spheres, 15 parts
Halogen-free flame retardants: nitrogen phosphorus composite flame-retardant agent, 10 parts
Filler: calcium carbonate, 5 parts
Oxidation inhibitor: antioxidant 1010,0.3 part
UV light stabilizing agent: photostabilizer 850,0.5 part
Pigment bag: titanium dioxide, 4 parts
2, the preparation of light flame-retardant TPO waterproof roll, is with the difference of embodiment 1, and step (1) obtains the diameter 100nm ~ 20 μm Hollow Phenolic Micro-Spheres modified.
Standard recipe: the preparation of fire-retardant TPO waterproof coiled material
1, the standard recipe of fire-retardant TPO waterproof coiled material is made by the raw material of following parts by weight:
TPO resin: full aggretion type TPO resin, 100 parts
Halogen-free flame retardants: magnesium hydroxide, 50 parts
Filler: calcium carbonate, 10 parts
Oxidation inhibitor: antioxidant 1010,0.3 part
UV light stabilizing agent: photostabilizer 850,0.5 part
Pigment bag: titanium dioxide, 4 parts
2, the preparation of fire-retardant TPO waterproof coiled material
(2) TPO compound material master batch preparation: according to TPO coiled material granulating formula, first all granulating formula starting material are mixed in mixing equipment; Then utilize whipping device to be transported in twin screw extruder granulating equipment the compound material mixed, extrude, draw, cool, granulation, oven dry, collection; Wherein, the barrels set temperature of twin screw extruder is 165 DEG C ~ 190 DEG C, and pelletizing speed is 250 revs/min.
(3) preparation of homogeneous pattern TPO waterproof roll: the TPO compound material master batch will obtained in twin screw extruder, directly to extrude and through three rolling smooth calendered, with after be prepared into through cooling, correction, trimming, cutting, rolling, packaging the homogeneous pattern TPO coiled material that thickness is 1.0mm-2.5mm; Wherein, barrel zone temperature is 165 DEG C ~ 190 DEG C, and main-machine screw rotating speed is 350 revs/min.
Testing method:
Tensile strength and the elongation at break of the homogeneous pattern efficient and light weight fire-retardant TPO waterproof coiled material of standard recipe, embodiment 1, embodiment 2 and embodiment 4 are tested according to method B in GB/T328.9-2007, adopt the dumbbell I type test specimen of compound GB/T528, draw speed 250mm/min; Tensile strength and the elongation at break of embodiment 3 enhancement type light-weight highly effective flame-retardant TPO waterproof roll are tested according to method A in GB/T328.9-2007; Product flame retardant properties testing method, adopts GB/T2406.2-2009 " Plastics Combustion performance measurement-oxygen index method " to measure the flame retardant properties of material; Extrudate density take ethanol as reference liquid, adopts density balance to measure; The thermo-welding test of TPO waterproof roll adopts hot gas welding machine (Swiss) at the enterprising line operate of rock wool, and coiled material face of weld wants wiped clean, and welding conditions parameter is 500 DEG C, 2.5m/min; Seam stripping strength is according to testing method described in GB/T328.21-2007 polymer coiled material seam stripping strength, and speed is 100mm/min, and test result is as shown in table 1.
Table 1-standard recipe and embodiment 1-4 test data table
As shown in Table 1, under the prerequisite of oxygen index 27 ~ 28, embodiment 1-4 density reduces by 21.5% ~ 27.8%, and goods seam stripping strength also enlarges markedly simultaneously.

Claims (9)

1. a light flame-retardant thermoplastic polyolefin water-proof coiled material, it is characterized in that, for the homogeneous pattern TPO waterproof roll of individual layer fire-retardant TPO coiled material layer or containing fire-retardant TPO upper layer, not containing the enhancement type TPO waterproof roll of fire-retardant TPO bottom surface layer and intermediate mesh cloth enhancement layer structure; Wherein, the formula of fire-retardant TPO coiled material layer or upper layer comprises the raw material composition of following parts by weight: TPO resin 100 parts, hollow microsphere 5 ~ 25 parts, halogen-free flame retardants 5 ~ 50 parts, 0.01 ~ 3 part, oxidation inhibitor, UV light stabilizing agent 0.01 ~ 3 part, pigment bag 1 ~ 8 part.
2. light flame-retardant thermoplastic polyolefin water-proof coiled material according to claim 1, it is characterized in that, the formula of described fire-retardant TPO coiled material layer or upper layer is made up of the raw material of following parts by weight: TPO resin 100 parts, hollow microsphere 10 ~ 20 parts, halogen-free flame retardants 10 ~ 15 parts, filler 5 ~ 10 parts, 0.3 part, oxidation inhibitor, UV light stabilizing agent 0.5 part, pigment bag 4 parts.
3. light flame-retardant thermoplastic polyolefin water-proof coiled material according to claim 1 or 2, is characterized in that, described hollow microsphere is the sphere material with thin-wall case hollow structure.
4. light flame-retardant thermoplastic polyolefin water-proof coiled material according to claim 3, is characterized in that, phenolic aldehyde hollow microsphere, hollow glass microballoon, polyimide hollow microsphere or the hollow silica microsphere of described hollow microsphere to be diameter be 100nm ~ 20 μm.
5. light flame-retardant thermoplastic polyolefin water-proof coiled material according to claim 4, it is characterized in that, described hollow microsphere is chemical grafting treated, phenolic aldehyde hollow microsphere, hollow glass microballoon, polyimide hollow microsphere or hollow silica microsphere that the diameter of Surface coating, surperficial coupling processing is 100nm ~ 20 μm.
6. according to the described light flame-retardant thermoplastic polyolefin water-proof coiled material of claim 1 or 2, it is characterized in that, described TPO is reactor polymeric thermoplastic polyolefine or mechanical blending type TPO.
7. described light flame-retardant thermoplastic polyolefin water-proof coiled material according to claim 1 and 2, is characterized in that, described halogen-free flame retardants is magnesium hydroxide, ammonium polyphosphate or silicon-nitrogen composite combustion inhibitor.
8. described light flame-retardant thermoplastic polyolefin water-proof coiled material according to claim 1 and 2, it is characterized in that, described pigment bag is a kind of and multiple mixture in titanium dioxide, carbon black, ferric oxide, Prussian blue, lead silicate, monoazo, tetrazo, Tai Celadon.
9. a preparation method for light flame-retardant thermoplastic polyolefin water-proof coiled material as claimed in claim 1 or 2, is characterized in that, the preparation of described homogeneous pattern TPO waterproof roll comprises the following steps:
(1) first all granulating formula starting material are mixed by the preparation of TPO compound material master batch: according to TPO coiled material granulating formula in mixing equipment; Then utilize whipping device to be transported in twin screw extruder granulating equipment the compound material mixed, extrude, draw, cool, granulation, oven dry, collection; Wherein, the barrels set temperature of twin screw extruder is 165 DEG C ~ 230 DEG C, and pelletizing speed is 100 revs/min ~ 400 revs/min;
(2) preparation of homogeneous pattern TPO waterproof roll: in twin screw extruder, the TPO compound material master batch of acquisition is directly extruded, barrel zone temperature is 165 DEG C ~ 230 DEG C, main frame screw rod rotating speed is 100 revs/min ~ 400 revs/min, and through smoother roller calendering, with after through cooling, correction, trimming, cutting, rolling, packaging, homogeneous pattern TPO coiled material;
The preparation of described enhancement type TPO waterproof roll: adopt forcing machine to extrude respectively on TPO coiled material surface layer and TPO coiled material bottom surface layer, wherein, bottom surface layer elder generation and grid cloth are in three rolling smooth roll hot pressing compounds, with after through cooling after enter another three rollings smooth roll and TPO upper layer hot pressing compound, with after be prepared into enhancement type TPO coiled material through cooling, correction, trimming, cutting, rolling, packaging; Wherein, sheet extruder temperature 160 DEG C ~ 240 DEG C, rotating speed is 100 revs/min ~ 500 revs/min.
CN201510640226.2A 2015-09-30 2015-09-30 Light flame-retardant thermoplastic polyolefin waterproof rolled material and preparation method thereof Pending CN105199181A (en)

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CN112063326A (en) * 2020-09-03 2020-12-11 苏州凯伦高分子新材料科技有限公司 Maintenance is with fire-retardant TPO waterproofing membrane
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CN106987056A (en) * 2017-04-25 2017-07-28 广东圆融新材料有限公司 A kind of modified polypropene with heat-reflective and preparation method thereof
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CN112063326A (en) * 2020-09-03 2020-12-11 苏州凯伦高分子新材料科技有限公司 Maintenance is with fire-retardant TPO waterproofing membrane
CN112721339A (en) * 2020-12-31 2021-04-30 福建闽华建材科技发展有限公司 Environment-friendly polymer composite waterproof coiled material and preparation method thereof
CN114607841A (en) * 2022-01-25 2022-06-10 上海伟星新型建材有限公司 Preparation method of temperature-resistant impact-resistant high-strength PPR fiber composite pipe

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Application publication date: 20151230