CN217622599U

CN217622599U - Grid stitch-bonding composite felt

Info

Publication number: CN217622599U
Application number: CN202221666833.8U
Authority: CN
Inventors: 李喜娜
Original assignee: Henan Saidi Composite Materials Co ltd
Current assignee: Henan Saidi Composite Materials Co ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2022-10-21
Anticipated expiration: 2032-06-30

Abstract

The utility model relates to a square stitch-bonding composite felt, include: the short cutting layer comprises a plurality of glass fiber short shreds with certain length which are uniformly spread in a non-directional way; the checkered cloth is lined on one side of the short cut layer; the square stitch-bonded composite felt further comprises: the continuous felt is positioned on one side, back to the chopped layer, of the check cloth and comprises a plurality of glass fiber filaments which are connected in an adhesive mode and are not chopped; the chopped strand mat is positioned on one side of the continuous mat, which is back to the checkered cloth, and comprises a plurality of glass fiber chopped strands which are bonded and connected, are uniformly tiled in a non-directional manner and have a certain length; a stitch connecting the chopped layer, the check cloth, the continuous felt and the chopped felt in a coil structure; the double-side chopped glass fiber reinforced plastic composite material has a continuous felt and coil stitch-bonding structure, greatly improves the tensile strength, is suitable for producing and using glass fiber reinforced plastic products with high strength requirements, is soft and easy to shape, has regular surface lines, can be finely cut, and is suitable for glass fiber reinforced plastic products with complex shapes.

Description

Grid stitch-bonding composite felt

Technical Field

The utility model relates to a square stitch-bonding composite felt.

Background

At present, the grid stitch-bonded composite felt takes a piece of grid cloth as a base layer, glass fiber chopped strands with certain length are uniformly paved on the grid cloth in an unoriented way, then the glass fiber fabric is made by adopting stitch-bonding connection through stitches, and the stitches are multi-purpose polyester threads used for reinforcing unsaturated polyester resin, vinyl ester resin, epoxy resin, phenolic resin, polyurethane resin and other forming processes, including pultrusion processes, hand lay-up supply, resin transfer molding forming processes and the like.

When a high-strength and thick glass fiber reinforced plastic product needs to be prepared in the using process, the existing grid stitch-bonded composite felt is used as a reinforcing material, the thickness of the existing grid stitch-bonded composite felt is thin, the existing grid stitch-bonded composite felt cannot be comprehensively combined with resin to comprehensively reinforce the resin, and after the thickness of glass fiber short cut threads and the number of layers of grid cloth are increased, on one hand, the short cut threads are only connected by stitch bonding, and the too thick thickness causes the unstable connecting structure, is not beneficial to fine cutting, and also causes part of the short cut threads to fall off; on the other hand, the unidirectional chopped strands cannot greatly improve the tensile strength of the glass fiber reinforced plastic product even if the thickness of the chopped strands is increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a square stitch-bonding composite felt to solve the problem that is used for among the prior art high strength glass steel goods, reinforcing strength are not enough.

In order to achieve the purpose, the utility model provides a compound felt of square stitch bonding's technical scheme is:

a square stitch bonded composite felt comprising: the short cutting layer comprises a plurality of glass fiber short shreds which are uniformly paved in a non-directional way and have certain length; the checkered cloth is lined on one side of the short cut layer; the square stitch-bonded composite felt further comprises:

the continuous felt is positioned on one side, back to the chopped layer, of the check cloth and comprises a plurality of glass fiber filaments which are connected in an adhesive mode and are not chopped; the chopped strand mat is positioned on one side, back to the check cloth, of the continuous mat and comprises a plurality of glass fiber chopped strands which are connected in an adhesive mode, are uniformly paved in a non-directional mode and are of a certain length; and the stitches are used for stitch-bonding the chopped layer, the check cloth, the continuous felt and the chopped felt in a coil structure.

The beneficial effects are that: compared with the prior art with only short cut layers, the continuous felt can remarkably increase the tensile strength; the thickness of the continuous felt and the chopped felt is increased, and a bilateral chopped structure is formed, so that the continuous felt and the chopped felt can be comprehensively combined with a thicker glass fiber reinforced plastic product to realize more comprehensive reinforcement; the suture is stitch-bonded with a coil structure as a thickened continuous felt and a chopped strand mat, the internal glass fiber filaments are connected in a bonding mode, the stability is better, the shedding is not easy, the phenomenon that the shedding of the glass fiber filaments is increased is avoided, and the fine cutting can be carried out.

Further, the length of the chopped layer and the glass fiber chopped strands of the chopped strand mat is in the range of 2-12cm.

The beneficial effects are that: the glass fiber short shreds in the chopped strand layer are the same in length, and the glass fiber short shreds in the chopped strand mat are the same in length; the combination of a certain length and the length range is suitable for the uniform distribution of the glass fiber short shreds during processing, and can form interaction to ensure the reinforcing effect. Too short is not beneficial to enhancing the effect and too long makes the processing more difficult.

Furthermore, the glass fiber chopped threads and the glass fiber threads are alkali-free glass fibers.

The beneficial effects are that: the alkali-free glass fiber has better reinforcing effect, and has good chemical stability, electrical insulation performance and strength.

Further, the suture is a polyester thread.

The beneficial effects are that: the polyester yarn has good wet tensile strength and high tensile strength after being combined with resin.

Drawings

Fig. 1 is a schematic structural view of an embodiment 1 of the square stitch-bonded composite felt of the present invention.

In the figure: 1. a chopped layer, 2, a piece of checkered cloth, 3, a continuous felt, 4, a chopped felt, 5 and a sewing line.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention, i.e., the described embodiments are merely illustrative of some, but not all, of the embodiments of the invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, elements defined by the phrases "comprising a" \8230; "do not exclude processes, methods of including such elements.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art through specific situations.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the term "provided" may be used in a broad sense, for example, the object provided may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art through specific situations.

The present invention will be described in further detail with reference to examples.

The utility model provides a concrete embodiment 1 of compound felt of square stitch bonding:

as shown in fig. 1, a square-stitched composite mat comprising: the chopped layer 1 comprises a plurality of glass fiber chopped strands which are uniformly paved in a non-directional manner and have certain length; the check cloth 2 is lined on one side of the short cut layer 1; the continuous felt 3 is positioned on one side, back to the short cut layer 1, of the checkered cloth 2 and comprises a plurality of glass fiber yarns which are connected in a bonding mode and are not subjected to short cutting; the chopped strand mat 4 is positioned on one side of the continuous mat 3, which is back to the checkered cloth 2, and comprises a plurality of glass fiber chopped strands which are bonded and connected, are uniformly tiled in a non-directional manner and have a certain length; and the stitches 5 are used for stitch-bonding and connecting the chopped layer 1, the checked cloth 2, the continuous felt 3 and the chopped felt 4 in a coil structure. The weight ratio of the glass fiber chopped strands of the chopped layer in the unit area of the square stitch-bonded composite felt to the glass fiber chopped strands of the square cloth, the glass fiber filaments of the continuous felt to the glass fiber chopped strands of the chopped felt is 1:1:1:1.

the continuous felt 3 can significantly increase the tensile strength; the continuous mat 3 and chopped mat 4 increase in thickness. The double-side short cutting structure is formed, so that the glass fiber reinforced plastic composite material can be comprehensively combined with a thicker glass fiber reinforced plastic product to realize more comprehensive reinforcement; the suture 5 is stitch-bonded with a coil structure, the thickened continuous felt 3 and the thickened chopped strand mat 4 are connected in an adhesion mode, so that the stability is better, the shedding is difficult, the phenomenon that the glass fiber chopped strand shedding is increased is avoided, the fine cutting can be carried out, and the glass fiber reinforced plastic composite material is suitable for producing glass fiber reinforced plastic products with complex shapes.

In the embodiment, the lengths of the glass fiber chopped threads of the chopped layer 1 are all 5cm; the lengths of the glass short shreds of the chopped strand mats 4 are all 5cm. The length is suitable for the uniform distribution of the glass fiber chopped strands during processing, and can form interaction to ensure the reinforcing effect.

In this embodiment, both the chopped fiberglass threads and the fiberglass threads are alkali-free fiberglass. The alkali-free glass fiber has better reinforcing effect, and has good chemical stability, electrical insulation performance and strength.

In this embodiment, the suture 5 is a polyester thread. The polyester yarn has good wet tensile strength and high tensile strength after being combined with resin.

The utility model provides a concrete embodiment 2 of compound felt of square stitch bonding:

the difference between this example and example 1 is that in example 1, both the glass staple fibers and the glass filaments are alkali-free glass fibers. In this embodiment, the glass fiber chopped strands are alkali-free glass fibers, and the glass fiber filaments are medium-alkali glass fibers.

The utility model provides a concrete embodiment 3 of square stitch-bonding composite felt:

the difference between this embodiment and embodiment 1 is that in embodiment 1, the checked cloth 2 is in direct contact with the continuous felt 3, and in this embodiment, there are several glass short filaments of a certain length laid uniformly in a non-directional manner between the checked cloth 2 and the continuous felt 3.

Finally, it should be noted that the above mentioned embodiments are only preferred embodiments of the present invention, and not intended to limit the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made without inventive effort to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A square stitched composite felt comprising:

the short cutting layer comprises a plurality of glass fiber short shreds which are uniformly paved in a non-directional way and have certain length;

the checkered cloth is lined on one side of the short cut layer;

it is characterized in that the square stitch-bonded composite felt further comprises:

the continuous felt is positioned on one side, back to the chopped layer, of the check cloth and comprises a plurality of glass fiber filaments which are connected in a bonding mode and are not chopped;

the chopped strand mat is positioned on one side, back to the check cloth, of the continuous mat and comprises a plurality of glass fiber chopped strands which are connected in an adhesive mode, are uniformly paved in a non-directional mode and are of a certain length;

and the stitches are used for stitch-bonding the chopped layer, the check cloth, the continuous felt and the chopped felt in a coil structure.

2. The square-stitched composite felt according to claim 1, wherein: the length range of the short cutting layer and the glass fiber short cutting threads of the chopped strand mat is 2-12cm.

3. The square-stitched composite felt according to claim 1, wherein: the glass fiber short cut filaments and the glass fiber filaments are alkali-free glass fibers.

4. The square stitch bonded composite felt according to claim 1, wherein: the suture is a polyester thread.