阅读说明：本技术 一种可重复利用的混凝土保温保湿养护膜 (But reuse's concrete heat preservation maintenance membrane of moisturizing ) 是由 王丙垒 纪宪坤 徐可 方博 刘拼 王德民 闵强 周青松 于 2021-07-30 设计创作，主要内容包括：本发明提供了一种可重复利用的混凝土保温保湿养护膜,属于混凝土养护材料领域。所述养护膜包括依次设置的防风保护层、保温层、吸水保湿层和贴面保湿层,每层之间通过缝纫线连接为一体；所述贴面保湿层在使用时与混凝土相接触；所述吸水保湿层为改性涤纶纤维无纺布。本发明提供的养护膜将高吸水树脂与由聚丙烯纤维制成的多个单层纤网整合成一体得到改性涤纶纤维无纺布作为吸水保湿层,并将养护膜的各层级结构缝纫成一体,在起到保温保湿作用的同时提高了养护膜可重复利用的效果。(The invention provides a reusable concrete heat-preservation and moisture-preservation curing film, and belongs to the field of concrete curing materials. The maintenance film comprises a windproof protective layer, a heat insulation layer, a water absorption and moisture retention layer and a veneering and moisture retention layer which are sequentially arranged, and all the layers are connected into a whole through sewing threads; the veneering moisturizing layer is contacted with concrete when in use; the water absorption and moisture retention layer is a modified polyester fiber non-woven fabric. The maintenance film provided by the invention integrates the super absorbent resin and a plurality of single-layer fiber nets made of polypropylene fibers to obtain the modified polyester fiber non-woven fabric as a water-absorbing and moisture-preserving layer, and the hierarchical structures of the maintenance film are sewn into a whole, so that the effect of heat preservation and moisture preservation is achieved, and the effect of reutilization of the maintenance film is improved.)

1. The reusable concrete heat-preservation and moisture-preservation maintenance film is characterized by comprising a wind-proof protection layer, a heat-preservation layer, a water-absorption and moisture-preservation layer and a veneering and moisture-preservation layer which are sequentially arranged, wherein all the layers are connected into a whole through sewing threads; the veneering moisturizing layer is contacted with concrete when in use; the water absorption and moisture retention layer is a modified polyester fiber non-woven fabric with the thickness of 1-3mm, and the preparation method of the modified polyester fiber non-woven fabric is as follows:

mechanically leveling long-cut polyester fibers produced by polypropylene particles, and forming a plurality of single-layer fiber nets by using net curtains; uniformly adding SAP particles into the first single-layer fiber web by using a funnel, covering a second single-layer fiber web on the surfaces of the SAP particles, carrying out hot rolling reinforcement, and integrating an upper pressing roller and a lower pressing roller into a whole by adopting a polished steel roller and a surface bonding mode to obtain a water-retaining chip; and placing the water-retaining chips among a plurality of single-layer fiber nets, and forming by a needling or rolling process to obtain the modified polyester fiber non-woven fabric.

2. The recyclable concrete insulating and moisturizing curing film as claimed in claim 1, wherein the SAP particles have a water absorption capacity of 40-80 times of their own weight.

3. The recyclable concrete heat-preserving and moisture-preserving curing film as claimed in claim 1, wherein the SAP particles have a fineness of 40-55 mesh and are used in an amount of 3-8 g/m²。

4. The reusable concrete heat-preservation and moisture-preservation curing film as claimed in claim 1, wherein the wind-proof protective layer is a PE film or a PVC coated textile fabric with a thickness of 0.1-0.5 mm.

5. The recyclable concrete heat-preserving and moisture-preserving curing film as claimed in claim 1, wherein the heat-preserving layer is EPE pearl wool or a bubble film, and the thickness of the heat-preserving and moisture-preserving curing film is 2-5 mm.

6. The recyclable concrete heat-preserving and moisture-preserving curing film as claimed in claim 1, wherein the wind-proof protective layer and the heat-preserving layer are of an integral structure, the integral structure is EPE pearl wool with an aluminum foil coated on the surface or a bubble film with an aluminum foil coated on the surface, the thickness of the integral structure is 2-5 mm, and the coating thickness of the aluminum foil is 0.05-0.1 mm.

7. The recyclable concrete thermal insulation and moisture retention curing film as described in claim 5 or 6, wherein the bubble film has a bubble diameter of 6mm and a bubble height of 3 mm.

8. The recyclable concrete heat and moisture preserving curing film as claimed in claim 1, wherein the facing and moisture preserving layer is a polyester textile fabric with a thickness of 0.1-0.5 mm.

9. The reusable concrete heat-preservation and moisture-preservation curing film as claimed in claim 1, wherein the sewing threads are polyester threads, the curing film is sewn into a grid shape, and the distance between any two parallel and adjacent sewing threads is 100-200 mm; and performing edge covering treatment on the edge of the maintenance film, wherein the width of the edge covering is 50-100 mm.

10. The reusable concrete thermal insulation and moisture retention curing film as claimed in claim 9, wherein one through hole is provided on the binding at intervals of 50cm in the length and/or width direction.

Technical Field

The invention belongs to the field of concrete curing materials, and particularly relates to a reusable concrete heat-preservation and moisture-preservation curing film.

Background

The concrete has the characteristics of high compressive strength, low tensile strength and high brittleness, and particularly, the penetration cracking risk of various factors such as plastic shrinkage, chemical shrinkage, temperature shrinkage, drying shrinkage and the like is accompanied in the hardening process of the concrete, so that the structural durability of the concrete is seriously threatened. The plane concrete structure such as the bottom plate or the top plate can adopt measures such as secondary plastering, covering film or geotextile water storage, moisture preservation, heat preservation and maintenance to reduce the cracking risk; the vertical concrete structure is often difficult to preserve moisture for a long time due to easy water falling and evaporation during watering maintenance, the manual watering efficiency is low, the cost is high, the durability is poor, the spraying mode can only preserve moisture and can not preserve heat, particularly, the large-volume concrete side wall or the upright column not only needs moisture preservation maintenance to reduce drying shrinkage cracks, but also needs long-term heat preservation maintenance to reduce the cooling rate and reduce the risk of temperature shrinkage cracks.

The prior art CN108795309A discloses a heat-preservation and moisture-preservation maintenance film for cast-in-place concrete of a railway, which is formed by sequentially compounding a plastic film, a coating fabric, a water storage and release material and a non-woven fabric, wherein all the layers are bonded by hot melt adhesive. The bottom surface of the non-woven fabric layer is coated with pressure-sensitive adhesive with a wet concrete base surface bonding function, and the coating fabric is a foam coating fabric. The water storage and release material is 60-150 mesh super absorbent resin particles. The specification of this patent application discloses that the particle size and the amount of super absorbent resin particles (SAP particles) used are strictly optimized, so that the occurrence of agglomeration is reduced as much as possible while a good curing effect is achieved, and the repeated use is facilitated. However, experimental data are not provided in the patent application to prove that the curing film can achieve the heat preservation effect and the recycling effect, and how the curing film can achieve the concrete curing effect is not disclosed. In addition, the super absorbent resin particles in the patent application are directly arranged between the coated fabric and the non-woven fabric, and are bonded through hot melt adhesive, so that under the dual effects of concrete hydration heat and water absorption expansion of the super absorbent resin, the super absorbent resin particles are easy to fall off and separate from the coated fabric and the non-woven fabric, and are finally easy to agglomerate; when the maintenance film is removed, the non-woven fabric is easy to be stuck by the wall surface to cause damage, and the super absorbent resin particles are also damaged; therefore, the curing film in this patent application is difficult to be recycled.

The prior art CN204235975U discloses a dry-wet type point glue moisturizing maintenance film, which is composed of a dry-wet mixed glue layer, a first nonwoven fabric layer, a water-absorbing polymer particle layer, a second nonwoven fabric layer and a plastic film layer, wherein the dry-wet mixed glue layer is coated or hot-pressed on the first nonwoven fabric layer, the water-absorbing polymer particle layer is arranged between the first nonwoven fabric layer and the second nonwoven fabric layer, the plastic film layer is laid on the second nonwoven fabric layer, and the plastic film layer, the second nonwoven fabric layer, the water-absorbing polymer particle layer, the first nonwoven fabric layer and the dry-wet mixed glue layer are connected by point glue. The wet and dry mixed glue layer of this patent can be used on dry or wet concrete surfaces. After the construction concrete is solidified and primarily dried, a dry and wet type point glue moisturizing curing film is adhered to the surface of the construction concrete, and the dry glue in the dry and wet mixed glue layer acts to enable the moisturizing curing film to be tightly attached to the surface of the construction concrete. But the maintenance film can not be used repeatedly, and a large amount of resource waste and white pollution can be caused by one-time use; the concrete curing agent only consists of 2 layers of non-woven fabrics and plastic films, has poor heat insulation performance, and is often cracked due to too high cooling rate when used for curing large-volume concrete; the bonding between each layer is not firm, and especially in severe windy weather, the plastic film is easy to separate, so that the moisture retention performance of the maintenance film is invalid.

The prior art CN209851223U discloses a concrete curing structure and a curing product using the same, wherein the concrete curing structure comprises a protective layer, a heat-insulating layer, a water-resisting layer and a moisture-preserving layer, and the protective layer, the heat-insulating layer, the water-resisting layer and the moisture-preserving layer are sequentially arranged; the heat-insulating layer is made of low-density porous heat-insulating material; the water-resisting layer and the moisturizing layer are arranged in a composite and integrated mode. The maintenance product using the concrete maintenance structure also comprises a self-bonding structure, wherein the self-bonding structure is arranged on one surface, which is not provided with the waterproof layer, of the moisture retention layer of the maintenance structure; or the maintenance structure further comprises a suspension structure and a fixing device, wherein the suspension structure is arranged at the top of the maintenance structure, and the fixing device is arranged at the bottom of the maintenance structure. The maintenance structure disclosed in the patent can realize close fitting with concrete, and simultaneously has the effects of heat preservation and moisture preservation; the self-adhesive structure can realize free adhesion and disassembly and assembly with concrete, can be repeatedly used and can be tightly attached to the surface of the concrete, and can ensure that external air flow cannot directly generate heat exchange with the concrete. However, the maintenance structure in this patent is too complex, the cost is high, the use procedure is complex, and the reliability of the fixing mode is poor.

Disclosure of Invention

In order to solve the problems of poor reusable effect, insecure bonding between effective functional layers, poor heat-preservation and moisture-preservation performances and the like of the concrete maintenance film in the prior art, the invention provides a reusable concrete heat-preservation and moisture-preservation maintenance film, which adopts the following technical scheme:

a recyclable concrete heat-preservation and moisture-preservation maintenance film comprises a wind-proof protection layer, a heat-preservation layer, a water-absorption and moisture-preservation layer and a veneering and moisture-preservation layer which are sequentially arranged, wherein each layer is connected into a whole through a sewing thread; the veneering moisturizing layer is contacted with concrete when in use; the water absorption and moisture retention layer is a modified polyester fiber non-woven fabric with the thickness of 1-3mm, and the preparation method of the modified polyester fiber non-woven fabric is as follows:

mechanically leveling long-cut polyester fibers produced by polypropylene particles, and forming a plurality of single-layer fiber nets by using net curtains; uniformly adding SAP particles into the first single-layer fiber web by using a funnel, covering a second single-layer fiber web on the surfaces of the SAP particles, carrying out hot rolling reinforcement, and integrating an upper pressing roller and a lower pressing roller into a whole by adopting a polished steel roller and a surface bonding mode to obtain a water-retaining chip; and placing the water-retaining chips among a plurality of single-layer fiber nets, and forming by a needling or rolling process to obtain the modified polyester fiber non-woven fabric.

According to the invention, the polypropylene fiber is made into a single-layer fiber web, the SAP particles and two single-layer fiber webs are rolled into a whole to obtain the water-retaining chip, and the water-retaining chip and a plurality of single-layer fiber webs are integrated into a whole to obtain the water-absorbing and moisture-retaining layer, so that the high-molecular water-absorbing resin particles can not fall off after being used for one time or more times, and the maintenance film can not be reused due to agglomeration. The number of the single-layer fiber webs is determined by the thickness of the water absorption and moisture retention layer and the single fiber web. Because concrete surface non-flat surface, there is easy adhesion destruction of protruding structures such as piece bolt absorb water moisturizing layer, consequently, veneer moisturizing layer demolishs after the maintenance is over during the maintenance membrane, can protect absorb water moisturizing layer is not destroyed, and prevents absorb water moisturizing layer glues in the concrete surface, thereby reaches and makes maintenance membrane reuse can and can not reduce the purpose of maintenance effect. The SAP particles may be any super absorbent resin particles that can satisfy concrete curing conditions, for example, the SAP particles may be polyacrylate, polyvinyl alcohol, polyacrylamide, organic-inorganic composite, cellulose, or starch super absorbent resin particles.

Preferably, the water absorption capacity of the SAP particles is 40-80 times of the self weight.

Preferably, the fineness of the SAP particles is 40-55 meshes, and the dosage of the SAP particles is 3-8 g/m²。

When the SAP particles are excessively mixed, the weight of the maintenance film after water absorption is excessively large and is difficult to fix, and when the SAP particles are excessively mixed, the moisturizing age is reduced; when the SAP particles are too thick, the maintenance film is easy to expand locally due to excessive volume expansion after water absorption, and is not easy to be flatly paved on the surface of concrete.

Preferably, the windproof protective layer is a PE film or PVC coating woven cloth, and the thickness is 0.1-0.5 mm.

The PVC coating woven cloth is acrylic fiber or polyester fiber woven cloth with a PVC coating coated on one side, and the thickness of the PVC coating is generally 0.1-0.5 mm; in order to prevent pinhole defects, the PVC coating is applied on the surface of the acrylic fiber or polyester textile cloth after the acrylic fiber or polyester textile cloth, the heat-insulating layer, the water-absorbing moisture-preserving layer and the veneering moisture-preserving layer are sewn into a whole.

Preferably, the heat preservation layer is EPE pearl cotton or an air bubble film, and the thickness is 2-5 mm. The temperature of the using environment of the heat-insulating layer is up to 80 ℃, and the heat-insulating layer can be arranged into one layer or a plurality of layers according to the heat-insulating requirement.

Preferably, the windproof protective layer and the heat preservation layer are of an integrated structure, the integrated structure is EPE pearl wool with an aluminum foil coated on the surface or an air bubble film with an aluminum foil coated on the surface, the thickness of the integrated structure is 2-5 mm, and the coating thickness of the aluminum foil is 0.05-0.1 mm. The aluminum foil is coated on the surface of the heat-insulating layer, so that the wind-proof protection effect can be achieved, and the heat-insulating effect of the heat-insulating layer can be enhanced.

Preferably, the bubble diameter of the bubble film is 6mm, and the bubble height is 3 mm.

Preferably, the veneering moisturizing layer is polyester woven cloth, and the thickness of the veneering moisturizing layer is 0.1-0.5 mm.

Preferably, the sewing threads are polyester threads, the curing film is sewn into a grid shape, and the distance between any two parallel and adjacent sewing threads is 100-200 mm; and performing edge covering treatment on the edge of the maintenance film, wherein the width of the edge covering is 50-100 mm. During edge covering, the area of the terylene textile cloth of the veneering moisturizing layer can be larger than that of other three-layer structures, so that the redundant cloth around the terylene textile cloth is directly used for edge covering; the maintenance film can also be subjected to edge covering treatment by using polyester textile cloth alone. In order to facilitate the paving and sticking of the edges of two adjacent curing films on the surface of concrete after the overlapping, the thickness of the edges should not be too thick, therefore, if the polyester textile cloth of the veneering moisturizing layer is used for edge covering during edge covering treatment, only a windproof protective layer and a veneering moisturizing layer can be selected to be wrapped, and a windproof protective layer, a veneering moisturizing layer, a heat-insulating layer or a windproof protective layer, a veneering moisturizing layer or a water-absorbing moisturizing layer can be selected to be wrapped; if the polyester textile cloth is used for edge covering alone, only the wind-proof protective layer and the veneering moisturizing layer are wrapped. In order to make the edge covering more firm and durable, the core of the edge covering can be reinforced by nylon ropes. Limiting the proper distance between sewing threads may allow the protective film structure to be more robust while further preventing the accumulation of SAP particles that may be dislodged in small amounts after multiple uses.

Preferably, one through hole is provided on the edge wrap at intervals of 50cm in the length and/or width direction. The through hole can be a round hole or a regular polygonal hole; when the hole is a round hole, the diameter of the round hole is 2 cm; in the case of regular polygon holes, the circumscribed circle of the regular polygon has a diameter of 2 cm.

When concrete is cured, the surface of the concrete is fully wetted, the curing film is laid on the surface of the concrete, the curing film penetrates through the through hole through a special concrete gasket and is fixed on a concrete wall surface to be cured, and after curing is finished, the shooting nail is removed through mechanical cutting. When needing to use polylith maintenance membrane, through the overlap joint of borduring between two adjacent maintenance membranes, and the overlap joint during adjacent through-hole coincidence of borduring, then shoot the nail through the special gasket of concrete with the maintenance membrane is fixed in the concrete wall that needs the maintenance, avoids leaking gas and leads to the moisture evaporation because of the overlap joint of borduring.

Compared with the prior art, the invention has the beneficial effects that:

(1) the high water-absorbent resin and the single-layer fiber nets made of the polypropylene fiber are integrated to obtain the modified polyester fiber non-woven fabric as a water-absorbent and moisture-retention layer, so that the falling and agglomeration caused by the infirm adhesion or non-adhesion of water-absorbent resin particles in the maintenance film in the prior art are avoided;

(2) the polyester fiber non-woven fabric which is low in heat preservation coefficient, good in moisturizing effect, light and durable is used as a carrier of the super absorbent resin, and the prepared water-absorbing moisturizing layer has the functions of heat preservation and moisturizing;

(3) each layer structure of the maintenance film is sewn into a whole through sewing threads, so that the combination of each layer is firmer, and super absorbent resin particles can be prevented from falling off and gathering, thereby improving the durability of the maintenance film and ensuring that the maintenance film has good reutilization effect;

(4) the veneering moisturizing layer can prevent the water-absorbing moisturizing layer from being stuck on the surface of concrete and being damaged, and the reutilization effect of the maintenance film is improved on the other hand.

Drawings

FIG. 1 is a top view of the reusable concrete insulating and moisturizing film of the present invention;

FIG. 2 is a sectional view of the reusable concrete insulating and moisturizing film according to example 1 of the present invention;

FIG. 3 is a sectional view of the reusable concrete insulating and moisturizing film according to example 2 of the present invention.

In the figure: 1. a windproof protective layer; 2. a heat-insulating layer; 3. a water-absorbing moisture-retaining layer; 4. a surface moisturizing layer; 5. a through hole; 6. SAP particles.

Detailed Description

The technical solution of the present invention is described in detail and fully with reference to the following examples, it is obvious that the described examples are only a part of the examples of the present invention, and not all of the examples. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention. Any equivalent changes or substitutions by those skilled in the art according to the following embodiments are within the scope of the present invention.

Except for special description, the reusable concrete heat-preservation and moisture-preservation curing film in the following embodiments adopts the following technical scheme:

as shown in fig. 1 to 3, the maintenance film comprises a wind-proof protective layer 1, a heat-insulating layer 2, a water-absorbing moisture-preserving layer 3 and a veneering moisture-preserving layer 4 which are sequentially arranged, and all the layers are connected into a whole through sewing threads; the veneering moisturizing layer is contacted with concrete when in use; the water absorption and moisture retention layer is a modified polyester fiber non-woven fabric with the thickness of 1-3mm, and the preparation method of the modified polyester fiber non-woven fabric is as follows:

mechanically leveling long-cut polyester fibers produced by polypropylene particles, and forming a plurality of single-layer fiber nets by using net curtains; uniformly adding SAP particles 6 into the first single-layer fiber web by using a funnel, covering a second single-layer fiber web on the surfaces of the SAP particles, carrying out hot rolling reinforcement, and integrating an upper pressing roller and a lower pressing roller into a whole by adopting a polishing steel roller and a surface bonding mode to obtain a water-retaining chip; placing the water-retaining chips among a plurality of single-layer fiber nets, and forming by a needling or rolling process to obtain the modified polyester fiber non-woven fabric; the number of the single-layer fiber webs is determined by the thickness of the water absorption and moisture retention layer.

Example 1

The embodiment provides a recyclable concrete heat-preservation and moisture-preservation curing film, wherein the SAP particles are polyacrylate grafted copolymer, the water absorption rate is 40 times of the self weight, the fineness is 48 meshes, and the adding amount is 8g/m²(ii) a The distance between any two parallel adjacent sewing threads is 150 mm; performing edge covering treatment on the maintenance film, as shown in fig. 2, rolling up the edge of the facing moisture-retention layer 4 to wrap the water-absorbing moisture-retention layer 3 and the wind-proof protection layer 1 during edge covering, wherein the width of the edge covering is 80mm, and the core part of the edge covering is reinforced by a nylon rope; and a through hole 5 is arranged on the wrapping edge at intervals of 50cm, and the through hole is a circular hole with the diameter of 2 cm.

The structure and material specifications of the maintenance film are shown in table 1:

table 1: structure and Material Specification of curing film of example 1

Example 2

This example provides a recyclable concrete thermal-insulation moisture-retention curing film, wherein the SAP particles are starch-acrylic acid seed polymer, the water absorption rate is 80 times of their own weight, the fineness is 40 meshes, and the addition amount is 3g/m²(ii) a The distance between any two parallel adjacent sewing threads is 200 mm; performing edge covering treatment on the maintenance film, wherein the attaching moisturizing layer 4 is rolled up to wrap the wind-proof protective layer 1 when the maintenance film is subjected to edge covering as shown in fig. 3, and the width of the edge covering is 50 mm; and a through hole 5 is arranged on the edge covering at an interval of 50cm, and the through hole is a square hole with the side length of 2 cm.

The structure and material specifications of the maintenance film are shown in table 2:

table 2: structure and Material Specification of curing film in example 2

Example 3

The embodiment provides a reusable concrete heat-preservation and moisture-preservation curing film, wherein an aluminum foil is coated on the surface of a heat-preservation layer to enable a wind-proof protective layer and the heat-preservation layer to form an integrated structure, the coating thickness of the aluminum foil is 0.05-0.1 mm, and the aluminum foil layer is the wind-proof protective layer; the SAP particles are cellulose-acrylonitrile graft polymer, the water absorption rate is 60 times of the self weight, the fineness is 55 meshes, and the adding amount is 5g/m²(ii) a The distance between any two parallel adjacent sewing threads is 100 mm; the maintenance film is subjected to edge covering treatment, the veneering moisture-retention layer is rolled up to wrap the wind-proof protective layer and the heat-insulation layer during edge covering, and the core part of the edge covering is reinforced by a nylon rope; the width of the wrapping edge is 100 mm; and a through hole is arranged on each edge covering at intervals of 50cm, each through hole is a diamond hole, and the length of the short diagonal line of each diamond hole is 2 cm.

The structural and material specifications of the maintenance film are shown in table 3:

table 3: structure and Material Specification of the curing film of example 3

Example 4

The embodiment provides a recyclable concrete heat-preservation and moisture-preservation curing film, wherein the SAP particles are polyacrylate polymers, the water absorption rate of the SAP particles is 70 times of the self weight, the fineness of the SAP particles is 45 meshes, and the adding amount of the SAP particles is 4g/m²(ii) a The distance between any two parallel adjacent sewing threads is 180 mm; the maintenance film is subjected to edge covering treatment, and the wind-proof protective layer are wrapped by using single polyester textile cloth during edge coveringThe width of the edge of the veneering moisturizing layer is 60 mm; and arranging a through hole at an interval of 50cm on the wrapping edge, wherein the through hole is a circular hole with the diameter of 2 cm.

The structure and material specifications of the maintenance film are shown in table 4:

table 4: structure and Material Specification of the curing film of example 4

Comparative example 1

The comparative example provides a heat-preservation and moisture-retention curing film for concrete, which comprises a wind-proof protective layer, a heat-preservation layer, a water-absorption and moisture-retention layer and a veneering and moisture-retention layer which are sequentially arranged, wherein each layer is bonded through hot melt adhesive; the veneering moisturizing layer is contacted with concrete when in use; the water absorption and moisture retention layer adopts polyacrylate grafted copolymer particles, the water absorption rate is 40 times of the self weight, the fineness is 48 meshes, and the adding amount is 8g/m²(ii) a The maintenance film is subjected to edge covering treatment, the edge of the veneering moisturizing layer is rolled up to wrap the water absorbing moisturizing layer and the wind-proof protective layer during edge covering, the width of the edge covering is 80mm, and the core of the edge covering is reinforced by a nylon rope; and arranging a through hole at an interval of 50cm on the wrapping edge, wherein the through hole is a circular hole with the diameter of 2 cm.

The structure and material specifications of the curing film were the same as those of example 1.

Comparative example 2

The curing film prepared in this comparative example is different from example 1 in that: the dosage of the polyacrylate grafted copolymer particles is 10g/m²。

Comparative example 3

The curing film prepared in this comparative example is different from example 1 in that: the dosage of the polyacrylate grafted copolymer particles is 2g/m²。

Comparative example 4

The water-saving and moisture-preserving maintenance film is purchased from New Sand energy Material Co.

Performance testing

The performance of the curing films prepared in the examples of the present invention and the comparative examples was tested, and the test results are shown in table 5. The test method refers to JG/T188-2010 concrete water-saving and moisture-keeping curing film.

Table 5: results of performance test of the curing films of examples and comparative examples

As can be seen from table 4, the heat preservation and moisture retention effects of the curing film prepared in the example of the present invention are significantly superior to those of the curing film in the comparative example. In comparative example 1, SAP particles were adhered between the heat-insulating layer and the facing moisture-insulating layer by hot melt adhesive, and after 5 times of use, workability was significantly deteriorated and it was difficult to reuse; and the maintenance film is not sewn into a whole, so that the strength of the maintenance film is obviously reduced, and the effect of repeated use of the maintenance film is also influenced. Compared with the example 1, the comparative example 2 shows that when the dosage of the SAP particles is too much, the water absorption capacity is too large, the self weight of the whole maintenance film is too large, the SAP particles are not easy to hang on the wall surface and fall off in practical application, the maintenance film is wholly expanded and is not easy to fold and stack, and the SAP particles are easy to accumulate along with the gravity to influence the repeated use; comparative example 3 compared to example 1, illustrates that too little SAP particles can result in reduced water absorption and retention properties and require repeated application of water to ensure efficacy. Comparative example 4 shows that the curing film prepared by the present invention has very significant advantages in both heat and moisture retention properties and recycling effects, compared with the commercially available curing film. It can be seen from the table that the strength of the curing membrane of example 3 is slightly reduced compared with other examples, because the wind-proof protective layer and the heat-insulating layer are integrated into one structure in example 3, the strength of the aluminum foil is obviously lower than that of the PE film or PVC coated woven cloth in other examples, but the thickness of the EPE pearl wool in example 3 is thicker than that in other examples, therefore, the overall strength of the curing membrane is not reduced too much, and the number of times of recycling is not different from that in other examples.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. The present invention may be subject to various modifications and changes by any person skilled in the art. Any simple equivalent changes and modifications made in accordance with the protection scope of the present application and the content of the specification are intended to be included within the protection scope of the present invention.