CN100509341C - Method for forming composite material product and composite material - Google Patents

Abstract

A method for forming a composite product and the composite material, the manufacturing process includes: preparing a substrate, hot pressing the composite material, cutting it into a predetermined size, and cold pressing the product. The process of hot pressing the composite material is to lay a film layer composed of a thermoplastic polyurethane elastomer (TPU) on the two base surfaces of the base fabric layer, and then cover one of the film layers with a bonding layer, and then hot press at a temperature of 120 to 180°C and a pressure of 2 to 10kg/ ^cm2 for 60 to 250 seconds to form a composite material. The composite material can be cut and cold pressed at 100 to 130°C and a pressure of 2 to 10kg/ ^cm2 for 60 to 180 seconds to form the composite product. The above method can not only quickly form a composite product with a smooth surface, but also improve the bonding strength of the composite material.

Description

Method for forming a composite material article and the composite material

technical field

The present invention relates to a method for forming composite material products and the composite material, in particular to a method for forming a composite material with a smooth surface after preparing the composite material base material, and the prepared composite material has better bonding strength, and can be used in sewing occasions.

Background technique

Generally used to make composite materials such as golf bags, notebook computers, mobile phone casings, etc., most of them are made of glass fiber, carbon fiber and other materials to make the base cloth layer, and then the fibers of the base cloth layer are impregnated with epoxy resin. resin and other thermosetting resins, and then stack several layers of resin-impregnated base cloth layers according to the required thickness, and then heat press the base cloth layers to form a composite material. The aforementioned composite material is sprayed with multiple layers of polyurethane (PU) paint after trimming to form a smooth surface on the composite material, and the aforementioned composite material with a smooth surface is subjected to cold pressing to form a Composite products of desired shape and size. The hot press forming and cold press forming mentioned here refer to different heating temperatures, that is, the heating temperature of cold press forming is relatively lower than that of hot press forming.

Although the composite material prepared by the above method has the advantages of free increase or decrease in thickness and good strength, it needs to wait for a long drying time after spraying polyurethane paint every time, so the whole manufacturing process requires a relatively long time. long time. In addition, in the past, the fibers of the base fabric layer were impregnated with a thermosetting resin in the composite material. The aforementioned thermosetting resin would also harden the hardness of the composite material after molding, making the product unable to be used in sewing.

In order to make the composite material have proper strength and at the same time solve the problems that it cannot be used in sewing occasions, although it is possible to combine the base fabric layer and the joint layer such as polyvinyl chloride (PVC) and polystyrene (PS) with moderate hardness to form a composite material, The method is to apply glue on the surface of the joint layer, attach the base cloth layer, and then attach a polyurethane (PU) joint layer or coat several layers of polyurethane (PU) paint on the other side of the base cloth layer. It has a smooth surface after molding, but since the base cloth layer and the bonding layer all need a long hardening time after bonding, the molding time is still very long, which is not economical. In addition, the base fabric layer and the joint layer made of fiber materials are of different materials, so the joint method of using glue as the adhesive agent for bonding the base fabric layer and the joint layer has poor joint strength after joining, and the mutual It is easy to peel off, and during the heating process, the residual solvent in the glue will also produce turbidity and air bubbles, which will affect the aesthetics of the composite material and its products after joining.

Contents of the invention

The object of the present invention is to provide a forming method of a composite material product which can be quickly formed and has a smooth surface.

Another object of the present invention is to provide a composite material that has better bonding strength and can be used in sewing.

The method for forming a composite material product of the present invention includes: preparing a base material, hot-press forming a composite material, cutting into a predetermined size, and cold-press forming a product, etc., wherein:

The step of preparing the base material: it is used to prepare the base material of the molding composite material. The above base material includes: a base cloth layer made of fiber and added with a diamine surface treatment agent, thermoplastic polyurethane elastomer (TPU ) composed of the first film layer, the second film layer, and the first bonding layer, wherein these film layers are respectively corresponding to the first base surface and the second base surface of the base fabric layer, and on the first film layer covering the first bonding layer. And the bonding layer is selected from: polyvinyl chloride, acrylonitrile-butadiene-styrene copolymer, polystyrene, polycarbonate or polyethylene terephthalate.

The step of forming composite materials by hot pressing: heat pressing the stacked substrates for 60-250 seconds at a temperature of 120-180°C and a pressure of 2-10kg/ ^cm2 to form a composite material. During the hot-pressing process, the The film layer will melt into the fibers of the base cloth layer, and chemically bond with the surface treatment agent in the base cloth layer, and the first joint layer will be firmly combined on the first base surface of the base cloth layer. At the same time, the The second film layer also forms a smooth surface on the second base surface of the base fabric layer due to infiltration into the fibers of the base fabric layer.

The step of cutting into a predetermined size: using a cutting technology to cut the hot-pressed composite material into a predetermined size and shape.

The step of forming cold-pressed products: using a predetermined molding die to apply pressure molding at a temperature of 100-130° C. and a pressure of 2-10 kg/cm ² on the composite material cut into a predetermined size and shape, after 60-180 seconds After a certain time, the composite article can be completed.

The aforementioned composite material product is formed by heating and pressing the composite material, and the film layers are made of thermoplastic polyurethane elastomer (TPU), and are respectively laid on the base surfaces of the base fabric layer , so the first bonding layer and the base fabric layer can be firmly bonded by the film layer and heat and pressure, and have better bonding strength.

The composite material of the present invention comprises: a base fabric layer made of fiber material, a first film layer, a second film layer, and at least one bonding layer, wherein the base fabric layer has a first base surface and a second base surface, It is characterized by:

These film layers are all made of thermoplastic polyurethane elastomer (TPU), and are respectively laid on the base surfaces of the base fabric layer, wherein the first film layer is bonded between the bonding layer and the base layer by thermocompression Between the first base surface of the cloth layer, and the second film layer is thermocompression bonded on the second base surface of the base cloth layer to form a smooth surface, and the above-mentioned bonding layer is selected from: polyvinyl chloride, acrylonitrile-butadiene - styrene copolymers, polystyrene, polycarbonate or polyethylene terephthalate.

Description of drawings

The present invention is described in detail below in conjunction with accompanying drawing:

Fig. 1 is an exploded perspective view of the first preferred embodiment of the composite material of the present invention.

Fig. 2 is a fragmentary assembled cross-sectional view of the preferred embodiment.

Fig. 3 is a manufacturing flow diagram showing the process of making the composite material of Fig. 1 and making the composite material into a composite material article.

Fig. 4 is a perspective view showing the appearance of a composite product manufactured by the manufacturing process in Fig. 3 .

Fig. 5 is a fragmentary assembled sectional view of the second preferred embodiment of the composite material of the present invention.

Detailed ways

Referring to FIGS. 1 and 2 , the first preferred embodiment of the composite material 2 of the present invention includes: a base fabric layer 21 , a first film layer 22 , a second film layer 23 , a first bonding layer 24 and a second bonding layer 25 . The base cloth layer 21 is made of carbon fiber (carbon fabric), and a diamine surface treatment agent is added in the fiber. The surface 211 is spaced apart from the second base surface 212 up and down. The film layers 22 , 23 are made of thermoplastic polyurethane elastomer (hereinafter referred to as TPU), and are melted on the base surfaces 211 , 212 of the base fabric layer 21 respectively. The bonding layers 24, 25 are selected from: polyvinyl chloride (PVC), acrylonitrile-butadiene-styrene (ABS) copolymer, polystyrene (PS), polycarbonate (PC) or polyparaffin Ethylene phthalate (PET), wherein the first bonding layer 24 is fused on the first base surface 211 of the base cloth layer 21 through the first film layer 22, and the second bonding layer 25 is bonded through the second The film layer 23 is fused on the second base surface 212 of the base fabric layer 21 .

Referring to Figures 1, 3, and 4, in order to manufacture the composite material 2, and further make the composite material 2 into the composite material product 2' of Figure 4, the method for forming the composite material product 1 of the present invention includes: Forming composite material 2, cutting into predetermined size, and cold pressing forming products.

Among them, in the step of preparing the base material, the base cloth layer 21 made of carbon fabric and added with a diamine surface treatment agent is prepared in advance, and the base cloth layer 21 is made of thermoplastic polyurethane elastomer (TPU). Formed film layers 22, 23, and the bonding layers 24, 25, wherein the bonding layers 23 can be selected from: polyvinyl chloride (PVC), acrylonitrile-butadiene-styrene (ABS), polystyrene (PS), polycarbonate (PC) or polyethylene terephthalate (PET).

After stacking the aforementioned substrates up and down, apply hot pressing. The hot pressing temperature is 120-180°C, the hot pressing pressure is 2-10kg/cm ² , and the hot-pressing time is 60-250 seconds. During the hot pressing process of the material, the film layers 22, 23 will thermally melt and penetrate into the fibers of the base cloth layer 21, and chemically bond with the surface treatment agent of the base cloth layer 21, so that the first bonding layer 24 can be The first film layer 22 is firmly combined on the first base surface 211 of the base cloth layer 21, and the second bonding layer 25 can also be stably bonded to the second base surface 212 of the base cloth layer 21 by the second film layer 23. , to form the composite material 2. The step of cutting into a predetermined size is to use a cutting technology to cut the hot-pressed composite material 2 into a predetermined size and shape.

The cold pressing in the step of cold pressing the molded product refers to using a temperature lower than that of the hot pressing step, and pressing the composite material 2 for the second time. The material 2 is pressed, the temperature of the cold pressing is 100-130°C, the pressure of the cold pressing is 2-10kg/cm ² , and the time of the cold pressing is 60-180 seconds. During this process, the composite material 2 can be softened. The composite material product 2' as shown in FIG. 4 can be completed by press molding.

That is to say, in order to make the base cloth layer 21 and the joint layers 24, 25 have better bonding strength, the present invention interposes a layer of TPU film layer 22, 23, without using glue to bond. In the process of hot-press forming composite materials, the TPU film layer 22 is melted and infiltrated into the fibers of the base cloth layer 21 by using the hot-press temperature. The amine surface treatment agent reacts to form a -CONH group with a strong bonding effect. When the composite material 2 is damaged by an external force, delamination is less likely to occur. In addition, since there is no epoxy resin coated on the base fabric layer 21 in the present invention, the composite material 2 can also be applied in the sewing process to provide more diverse processing methods.

Referring to Fig. 5, the composite material 2 of the second preferred embodiment of the present invention comprises: base cloth layer 21, first film layer 22, second film layer 23, and bonding layer 24, that is to say, the second preferred embodiment of the present invention The composite material 2 of the example has only the tie layer 24 of a single layer. When the substrates on the composite material 2 are stacked up and down and subjected to hot pressing, the first film layer 22 will also melt and infiltrate into the fibers of the base fabric layer 21 to combine the bonding layer 24 and the base fabric layer 21 . And this second film layer 24 also can penetrate in the fiber of base cloth layer 21 because of hot pressing, forms a smooth surface at the outer surface of base cloth layer 21 simultaneously, and the manufacturing process of aforementioned composite material 2 is identical with first embodiment, does not need Explain again.

To sum up the above, the product 2' formed by the composite material 2 of the present invention can be used in the conventional sewing process, and only one layer of bonding layer 24 can be pasted. The composite material 2 after heating and pressing has a smooth surface. In addition, the composite material for forming the product uses the film layers 22, 23 made of thermoplastic polyurethane elastomer as a means of combining the base fabric layer 21 and the bonding layer 24. The above technology can not only improve the product 2' Excellent bonding strength, also because there is no solvent in the TPU film layers 22, 23, no bubbles will be generated during the heating process, so that the product 2' has better aesthetics. At the same time, the base fabric layer 21 of the present invention is not coated with epoxy resin, which also allows the composite material 2 to be conveniently applied in the sewing process, so as to provide more diverse processing methods.

Claims (2)

1. the method for forming composite goods, it is characterized in that: the method includes the steps of:

Prepare base material: prepare base material in order to forming composite, above-mentioned base material comprises: the base cloth layer of two amine surface conditioning agents is made and be added with to fiber, the first film layer that is constituted by the thermoplastic polyurethanes elastomer, second thin layer, and first knitting layer, wherein, this base cloth layer has first basal plane separately, second basal plane, this the first film layer is between between first basal plane and first knitting layer of base cloth layer, second thin layer is second basal plane that is attached to base cloth layer, and this knitting layer is to be selected from: polyvinyl chloride, acrylonitrile-butadiene-styrene copolymer, polystyrene, Merlon or PETG;

Hot-forming composite: with 120～180 ℃ temperature and 2～10kg/cm ²Pressure hot pressing 60～250 seconds, to form this composite, described thin layer can melt in the fiber that infiltrates base cloth layer at hot pressing, and and surface conditioning agent produces chemical bonded refractory, wherein the first film layer can be with firm being combined on the base cloth layer of knitting layer, and second thin layer then can form smooth surface on second basal plane of base cloth layer;

Cut into preliminary dimension: utilize the technology that cuts that the composite after hot-forming is cut into predetermined size shape; And

The cold moudling goods: the composite pressurization that will cut into the preliminary dimension shape with predetermined mould forms composite product, and above-mentioned cold moudling temperature is 100～130 ℃, and pressure is 2～10kg/cm ², the time is 60～180 seconds.

2. the method for forming composite goods according to claim 1, it is characterized in that: in preparing the base material process, also preparing has second knitting layer, above-mentioned second knitting layer to be and the second thin layer combination.

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