Thermoplastic PU composite sponge

Abstract

The utility model discloses a thermoplastic polyurethane (PU) composite sponge, which relates to the technical field of sponges and comprises a framework part and a filling part, the framework part comprises a surface layer a and a surface layer b, the surface layer a and the surface layer b are connected through a tying belt, and a filling cavity is formed between the surface layer a and the surface layer b; and the filling part is a polyurethane sponge body, is positioned in the filling cavity and is bonded with the bonding surface of the surface layer a and the surface layer b. The thermoplastic PU composite sponge adopts a composite sponge structure, so that the toughness is improved, and meanwhile, the stability of the sponge in the production process is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sponges, in particular to a thermoplastic PU composite sponge. Background Art

[0002] The commonly used sponges are made of wood cellulose fibers or foamed plastic polymers. In addition, there are also natural sponges made from sponge animals, most of which are used for body cleaning or painting. In addition, there are three types of synthetic sponges made of other materials, namely low-density polyether (non-absorbent sponge), polyvinyl alcohol (highly absorbent material without obvious pores) and polyester.

[0003] Polyurethane sponge is a low-density PU with a foam density below 18kg / m3. The method is usually to use more than 4.5 parts of water (per 100 parts of polyol) and more than 55 parts of TDI. The heat dissipation problem of the foam is very prominent. Since the heat inside the foam is not easy to dissipate, the temperature automatically rises to more than 180°C during the foaming process, which will cause the foam to spontaneously combust, leading to a fire hazard.

[0004] The finished polyurethane has average toughness during use and is difficult to quickly recover from deformation after being squeezed, making it difficult to meet use requirements.

[0005] To this end, we propose thermoplastic PU composite sponge. Utility Model Content

[0006] The technical problem to be solved by the utility model is to overcome the existing defects, provide a thermoplastic PU composite sponge, a composite sponge structure, improve the toughness, and at the same time improve the stability of the sponge production process, which can effectively solve the problems in the background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a thermoplastic PU composite sponge, comprising a skeleton part and a filling part;

[0008] Skeleton part: comprising surface layer a and surface layer b, wherein the surface layer a and the surface layer b are connected by a lace, and a filling cavity is formed between the surface layer a and the surface layer b;

[0009] Filling part: It is a polyurethane sponge, which is located in the filling cavity and bonded to the fitting surfaces of the surface layer a and the surface layer b.

[0010] Furthermore, the skeleton part is a thermosetting plastic. The function of the skeleton part is to increase the toughness and strength of the filling part.

[0011] Furthermore, aeration holes are arranged on both the surface layer a and the surface layer b, and the polyurethane sponge enters the aeration holes to form an embedded body. The aeration holes are pores of the composite sponge, and the embedded body is conducive to the stable fit between the surface layer and the polyurethane sponge.

[0012] Furthermore, the surface of the lace is provided with protrusions, which ensure stable contact between the lace and the polyurethane sponge, further improving stability.

[0013] Furthermore, the protrusion is hollow, which is conducive to heat dissipation.

[0014] Furthermore, the lace is provided with air guide holes, and the two ends of the air guide holes respectively penetrate the surface layer a and the surface layer b. When processing the composite sponge, air is guided and heat is dissipated through the air guide holes, which can reduce the temperature of the central part of the polyurethane sponge and is conducive to the stable production of the polyurethane sponge.

[0015] Compared with the prior art, the beneficial effects of the utility model are: the thermoplastic PU composite sponge has the following advantages:

[0016] 1. This thermoplastic PU composite sponge adds a skeleton part to the polyurethane sponge to form a composite sponge, which can improve the overall toughness and have a good fit;

[0017] 2. The polyurethane sponge raw material is filled into the skeleton part to form a composite sponge. In this process, air is conducted and heat is dissipated through the air ducts, which can reduce the temperature of the central part of the polyurethane sponge and is conducive to the stable generation of the polyurethane sponge. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall cross-sectional structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the cross-sectional structure of the skeleton part of the utility model;

[0020] Figure 3 It is a schematic diagram of the structure of the utility model during the processing.

[0021] In the figure: 1 surface layer a, 2 surface layer b, 3 ties, 301 air guide holes, 4 polyurethane sponge bodies, 401 embedded bodies, 5 aeration holes, 6 protrusions. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-3 ,This embodiment provides a technical solution: a thermoplastic PU composite sponge, including a skeleton part and a filling part;

[0024] Skeleton parts, such as Figure 2 As shown: it includes a surface layer a1 and a surface layer b2, the surface layer a1 and the surface layer b2 are connected by a lace 3, and a filling cavity is formed between the surface layer a1 and the surface layer b2; a skeleton part is added to the polyurethane sponge 4 to form a composite sponge, which can improve the overall toughness and have a good fit;

[0025] The function of the skeleton part is to increase the toughness and strength of the filling part. The toughness of the skeleton part is higher than that of the filling part. Specifically, it can be a thermosetting plastic. The filling part formed during use can reduce the temperature effect on it.

[0026] The surface of the lace 3 is provided with a protrusion 6; the protrusion 6 enables the lace 3 and the polyurethane sponge 4 to be in stable contact, further improving the stability;

[0027] The protrusion 6 is hollow and communicates with the inner cavity of the lace 3; the hollow protrusion 6 is conducive to heat dissipation;

[0028] An air guide hole 301 is provided inside the lacing 3, and the two ends of the air guide hole 301 penetrate the surface layer a1 and the surface layer b2 respectively; when processing the composite sponge, air is guided and heat is dissipated through the air guide hole 301, which can reduce the temperature of the central part of the polyurethane sponge body 4, which is conducive to the stable production of the polyurethane sponge;

[0029] Filling part: a polyurethane sponge 4, which is located in the filling cavity and bonded to the fitting surfaces of the surface layer a1 and the surface layer b2;

[0030] Aeration holes 5 are provided on both surface layer a1 and surface layer b2, and the polyurethane sponge 4 enters the aeration holes 5 to form an embedded body 401; the aeration holes 5 are the pores of the composite sponge, which are used for the exchange of gas inside and outside the composite sponge, and the embedded body is conducive to the stable fit between the surface layer and the polyurethane sponge 4.

[0031] The production process of the thermoplastic PU composite sponge provided by the utility model is as follows:

[0032] First, process Figure 2 The frame part shown is coated with glue on the inner side of the frame part;

[0033] Then, the filling part is formed: the raw material for forming the polyurethane sponge is filled between the surface layer a1 and the surface layer b2, and after solidification and foaming, the polyurethane sponge is formed. Figure 3 The polyurethane sponge body 4 shown, a part of the polyurethane sponge protrudes to the outside of the surface layer a1 and the surface layer b2 through the aeration hole 5;

[0034] During the formation of the filling part, air is blown from one side by an external fan (for example, the fan is placed on the surface layer a1), and the airflow is discharged from the other side through the air guide hole 301 in the middle of the lace 3, taking away the heat of the filling part;

[0035] Finally, cutting is performed to remove the portions protruding to the outside of the surface layer a1 and the surface layer b2 along the surface of the surface layer a1 and the surface layer b2 (the portions in the aeration holes 5 and not protruding are the embedded bodies 401), so as to form Figure 1 The final product shown.

[0036] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. Thermoplastic PU composite sponge, characterized by: It includes a skeleton part and a filling part; The skeleton part comprises a surface layer a (1) and a surface layer b (2), wherein the surface layer a (1) and the surface layer b (2) are connected by a lace (3), and a filling cavity is formed between the surface layer a (1) and the surface layer b (2); The filling part is a polyurethane sponge (4), which is located in the filling cavity and is bonded to the fitting surfaces of the surface layer a (1) and the surface layer b (2).

2. The thermoplastic PU composite sponge according to claim 1, characterized in that: The skeleton part is made of thermosetting plastic.

3. The thermoplastic PU composite sponge according to claim 1, characterized in that: Aeration holes (5) are provided on both the surface layer a (1) and the surface layer b (2), and the polyurethane sponge (4) enters the aeration holes (5) to form an embedded body (401).

4. The thermoplastic PU composite sponge according to claim 1, characterized in that: The surface of the lace (3) is provided with a protrusion (6).

5. The thermoplastic PU composite sponge according to claim 4, characterized in that: The protrusion (6) is hollow.

6. The thermoplastic PU composite sponge according to claim 1, characterized in that: An air guide hole (301) is provided inside the lace (3), and two ends of the air guide hole (301) respectively penetrate the surface layer a (1) and the surface layer b (2).

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