CN211394354U - Multilayer strong cross pressed film single face sand self-adhesive waterproof coiled material - Google Patents

Abstract

The utility model discloses a multilayer strong cross pressed film single-side sand self-adhesive waterproof coiled material, which comprises a sintered sand layer, a first self-adhesive layer, a strong cross pressed film, a second self-adhesive layer and an isolating film from top to bottom in sequence; the strong cross lamination film is made by cross lamination of four layers and more than four layers of HDPE films, and the two adjacent films are crossed by 45 degrees; the upper surface and the lower surface of the strong cross pressed film are respectively coated with a first self-adhesive layer and a second self-adhesive layer by adopting a fixed-thickness blade coating method, and the thickness of the first self-adhesive layer and the thickness of the second self-adhesive layer are not less than 0.6 mm; the upper surface of the first self-adhesive layer is covered with a special sintered sand layer, and the lower surface of the second self-adhesive layer is covered with an isolating film; the waterproof coiled material provided by the utility model can improve the maximum tensile force and the elongation at break of the membrane; the coiled material has strong compatibility with post-cast concrete, ensures firm and durable bonding and avoids the formation of water leakage; the pre-wet paving integrated construction can be realized; the problem of foot sticking does not exist, and the construction period is relatively shortened.

Description

Multilayer strong cross pressed film single face sand self-adhesive waterproof coiled material

Technical Field

The utility model relates to a powerful alternately press mold single face sand self-adhered waterproofing membrane of multilayer belongs to waterproofing membrane technical field.

Background

With the rapid development of economy in China, the fields of civil and industrial buildings, bridges, tunnels, agricultural water conservancy, transportation and the like all put forward various high-quality requirements on waterproof materials. The waterproof roll is a curlable sheet-shaped waterproof material, is one of important varieties in waterproof materials for building engineering, and can be divided into three categories, namely an asphalt waterproof material, a high polymer modified waterproof roll and a synthetic polymer waterproof roll according to main waterproof composition materials. The common self-adhesive waterproof roll material with the polymer film base is a common building waterproof material, is popular with the construction parties due to moderate price and excellent performance, and develops very quickly. However, in the actual construction process, the common polymer film-based self-adhesive waterproof roll material has the following defects:

firstly, the waterproof material has poor tensile force and elongation at break, the maximum tensile force of the coiled material in the prior art is 200N/50mm, and the elongation at break of the membrane is 180 percent, so that the requirements of some special waterproof projects cannot be met, particularly some underground waterproof projects;

secondly, the self-adhesive layer is bonded with post-cast concrete insecurely, so that water leakage is easy to form;

thirdly, the waterproof coiled material cannot have the characteristics of pre-laying and wet-laying at the same time;

fourthly, the self-adhesive layer has the problem of foot adhesion, is not easy to get on people and exhaust, and causes construction inconvenience due to long construction period;

in summary, the prior art obviously has inconvenience and defects in practical use, so it is necessary to develop a new waterproof roll to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide a multilayer strong cross pressed film single face sand self-adhesive waterproof coiled material, which can improve the maximum tensile force of the waterproof coiled material and the elongation at break of the film; the coiled material has strong compatibility with post-cast concrete, ensures firm and durable bonding and avoids the formation of water leakage; the pre-wet paving integrated construction can be realized; the problem of foot sticking does not exist, and the construction period is relatively shortened.

For solving the technical problem, the utility model discloses a following technical scheme:

a multilayer strong cross pressed film single-sided sand self-adhesive waterproof coiled material sequentially comprises a sintered sand layer, a first self-adhesive layer, a strong cross pressed film, a second self-adhesive layer and an isolating film from top to bottom; the powerful cross laminated film is formed by cross lamination of four or more layers of HDPE films, the two adjacent films are crossed by 45 degrees, and the thickness of the HDPE film is not less than 0.2 mm; the upper surface and the lower surface of the strong cross pressed film are respectively coated with a first self-adhesive layer and a second self-adhesive layer by adopting a fixed-thickness blade coating method, and the thickness of the first self-adhesive layer and the thickness of the second self-adhesive layer are not less than 0.6 mm; the upper surface of the first self-adhesive layer is covered with a special sintered sand layer, and the lower surface of the second self-adhesive layer is covered with an isolating film.

Further, the first self-adhesive layer and the second self-adhesive layer are both modified asphalt self-adhesive glue.

Further, the tensile strength of the HDPE film is 600N/50 mm; the HDPE film has a film elongation at break of 300%.

Further, the thickness of the sintered sand layer is not less than 0.2 mm.

Furthermore, the isolating film is made of PE polyethylene or PET polyester film.

The utility model adopts the above technical scheme after, compare with prior art, have following advantage:

1. the utility model provides a reinforcing material of coiled material is made by four layers and four layers above special high-strength high-elongation HDPE membrane cross lamination, and pulling force, elongation at break performance are excellent, and the maximum pulling force can reach 600N/50mm, and the elongation at break of membrane is 300%, is far above the national standard level;

2. water channeling is eliminated, and the reliability of a waterproof system is improved; the upper surface is coated with specially-made sintered sand, and forms a mechanical locking effect with later-poured concrete, so that the water channeling phenomenon can be effectively prevented, and the skin-type waterproof effect is really realized;

3. the upper surface of the product is coated with sintered sand to form mechanical locking with post-poured concrete so as to realize pre-paving performance, the lower surface of the product is modified asphalt self-adhesive which can be bonded with a wet base surface by cement mortar or clean slurry so as to realize wet paving performance and realize pre-wet paving integrated construction;

4. the upper surface of the product is made of special sintered sand, so that the product can be effectively fused and bonded with post-cast concrete, can play a good role in isolation and dust prevention, cannot cause the problems of foot adhesion and the like, and reduces inconvenience in construction;

5. the waterproof coiled material and the structural layer are permanently bonded into a whole, and no water accumulation hidden trouble exists in the middle; even if waterproofing membrane suffers damage, also can inject water in local range, the reliability of waterproof layer has been improved safely, easy maintenance.

The present invention will be described in detail with reference to the accompanying drawings and examples.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

in the figure, 1-strong cross laminated film, 2-first self-adhesive layer, 3-second self-adhesive layer, 4-sintered sand layer and 5-isolation film.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.

Example 1 multilayer strong cross pressed film single face sand self-adhered waterproofing membrane

As shown in figure 1, the utility model provides a powerful alternately press mold single face sand self-adhesion waterproofing membrane of multilayer, the coiled material comprises five parts, from the top down is sintering sand bed 4, first from viscose layer 2, powerful alternately press mold 1, second from viscose layer 3 and barrier film 5 in proper order.

The strong cross laminated film 1 is made of reinforced materials, the strong cross laminated film 1 is formed by cross lamination of four or more HDPE films, two adjacent films are crossed at an angle of 45 degrees, namely a first film is crossed at an angle of 45 degrees with a second film, the second film is crossed at an angle of 45 degrees with a third film, and the first film is crossed at an angle of 90 degrees with the third film; the tensile strength of the HDPE film is 600N/50 mm; the HDPE film has the advantages that the film breaking elongation is 300%, the thickness of the HDPE film is not less than 0.2mm, and the HDPE film has high strength and high elongation.

Powerful alternately press mold 1's upper and lower two sides is scribbled respectively and is covered first from viscose layer 2 and second from viscose layer 3, and first from viscose layer 2 and second are scribbled the lid from viscose layer 3 adoption fixed thickness knife coating method, and first from viscose layer 2 and second are modified asphalt self-adhesive from viscose layer 3, and first from viscose layer 2 and second are all not less than 0.6mm from the thickness of viscose layer 3.

The upper surface of the first self-adhesive layer 2 is covered with a special sintered sand layer 4, and the thickness of the sintered sand layer 4 is not less than 0.2 mm; the lower surface of the second self-adhesive layer 3 is covered by an isolating film 5, and the isolating film 5 is made of PE polyethylene or PET polyester film and is a recyclable material, so that environmental pollution is avoided.

Embodiment 2 preparation method of multilayer strong cross-laminated single-sided sand self-adhesive waterproof roll

A preparation method of a multilayer strong cross-laminated single-sided sand self-adhesive waterproof coiled material comprises the following process steps:

step one, preparing a strong cross laminated film;

melting and plasticizing resin in a screw extruder, quantitatively extruding, forming by using a mouth film, and alternately bonding an upper film and a lower film at an angle of 45 degrees together, and overlapping four layers or more;

step two, preparing the modified asphalt self-adhesive;

the modified asphalt self-adhesive comprises the following components (by weight percent): 45% of asphalt, 5% of naphthenic oil, 15% of softening oil, 5% of SBS, 10% of SBR, 5% of tackifying resin and 15% of stone powder; the modified asphalt self-adhesive is prepared by taking asphalt as a main body, adding SBR, SBS elastomer, naphthenic oil, softening oil, tackifying resin, filler and the like, stirring at high temperature, melting and grinding at high speed, and the preparation process of the modified asphalt self-adhesive comprises the following steps:

a. adding asphalt and softening oil into an oxidation tank, starting stirring and raising the temperature to 160 ℃;

b, adding naphthenic oil and SBR at the temperature of 160 ℃, stirring for 1 hour, and raising the temperature to 190 ℃;

c, adding SBS at 190 ℃, stirring for 30min, and grinding for 2 h;

d. adding tackifying resin, stirring for 30min, and introducing the modified material into a stirring tank;

e. adding stone powder, and stirring for about 1h until the mixture is uniformly stirred;

f. introducing the modified self-adhesive material into a cooling tank, and reducing the temperature to 150 +/-5 ℃;

the modified asphalt self-adhesive has good viscosity, high and low temperature performance, higher cohesion and elongation than common self-adhesive materials, and can adapt to severe change of a base layer together with a strong cross laminated film;

step three, a product forming process;

the coating mode of the modified asphalt self-adhesive adopts a fixed-thickness blade coating method,

a. putting the modified asphalt self-adhesive material into oil scraping grooves 1# and 2# with adjusted thickness;

b. the upper surface of the powerful cross pressed film faces upwards, the powerful cross pressed film is driven by a large-scale 1# cooling roller, a self-adhesive layer on the upper surface is scraped and coated through a discharge port of a 1# oil scraping groove, and the temperature of the 1# oil scraping groove is controlled to be 145 +/-5 ℃;

c. the isolation film is driven by a 2# giant cooling roller, passes through a 2# oil scraping groove, scrapes and coats a lower surface self-adhesive layer, and the temperature of the 2# oil scraping groove is controlled at 150 +/-5 ℃.

d. The two are combined into one after passing through a composite roller;

e. and then the sand is uniformly spread on the self-adhesive layer on the upper surface by a sand spreading system, the sand is compacted by an extrusion roller, and the redundant sand is swept into a recovery hopper by the sand sweeping system and then is recovered and reused by a conveyor belt.

The upper surface self-adhesive layer must not be contacted with cooling water during the whole production process so as to avoid wetting.

The utility model discloses laying method: take foundation as an example

a. Coating cement paste or cement mortar with a certain thickness on a wet base surface (leveling layer) in a scraping way;

b. tearing off the isolation film on the lower surface of the coiled material, and directly paving the isolation film on cement paste or cement mortar (blade coating cement paste, film tearing and paving are generally carried out simultaneously, and cement paste solidification is not required);

c. building a steel bar structure on the laid waterproof layer;

d. and directly pouring concrete.

The foregoing is illustrative of the best mode of the invention, and details not described herein are within the common general knowledge of a person of ordinary skill in the art. The protection scope of the present invention is subject to the content of the claims, and any equivalent transformation based on the technical teaching of the present invention is also within the protection scope of the present invention.

Claims (5)

1. The utility model provides a powerful alternately press mold single face sand self-adhesion waterproofing membrane of multilayer which characterized in that: the self-adhesive film sequentially comprises a sintered sand layer (4), a first self-adhesive layer (2), a strong cross laminated film (1), a second self-adhesive layer (3) and an isolating film (5) from top to bottom; the strong cross laminated film (1) is formed by cross lamination of four or more layers of HDPE films, the two adjacent layers of films are crossed by 45 degrees, and the thickness of the HDPE film is not less than 0.2 mm; the upper surface and the lower surface of the strong cross pressed film (1) are respectively coated with a first self-adhesive layer (2) and a second self-adhesive layer (3) by adopting a fixed-thickness blade coating method, and the thicknesses of the first self-adhesive layer (2) and the second self-adhesive layer (3) are not less than 0.6 mm; the upper surface of the first self-adhesive layer (2) is covered with a special sintered sand layer (4), and the lower surface of the second self-adhesive layer (3) is covered with an isolating film (5).

2. The multilayer strong cross-laminated single-sided sand self-adhesive waterproof roll as claimed in claim 1, characterized in that: the first self-adhesive layer (2) and the second self-adhesive layer (3) are both modified asphalt self-adhesive glue.

3. The multilayer strong cross-laminated single-sided sand self-adhesive waterproof roll as claimed in claim 1, characterized in that: the tensile strength of the HDPE film is 600N/50 mm; the HDPE film has a film elongation at break of 300%.

4. The multilayer strong cross-laminated single-sided sand self-adhesive waterproof roll as claimed in claim 1, characterized in that: the thickness of the sintered sand layer (4) is not less than 0.2 mm.

5. The multilayer strong cross-laminated single-sided sand self-adhesive waterproof roll as claimed in claim 1, characterized in that: the isolating film (5) is made of PE polyethylene or PET polyester film.

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