TW201444672A - Method for forming thermoplastic composites - Google Patents

Abstract

A method for forming thermoplastic composites contains steps of cutting a thermoplastic film and a cloth material, wherein the thermoplastic film has an adhesive layer and a surface layer, and a melting point of the surface layer is higher than the adhesive layer; stacking the thermoplastic film and the cloth material on a platform and facing the adhesive layer of the thermoplastic film to the cloth material; heating and melting the adhesive layer and softening the surface layer; vacuuming the platform so as to attach the thermoplastic film and the cloth material downwardly and pressing the thermoplastic film and the cloth material by ways of a pressing member so that the adhesive layer of the thermoplastic film penetrates into and attach with the cloth material, wherein when the platform has a plurality of concave and convex patterns formed thereon and the surface layer of the thermoplastic film faces to a top surface of the platform, the surface layer has three-dimensional patterns corresponding to the plurality of concave and convex patterns, and wherein the cloth material and the thermoplastic film are cut in a predetermined shape and connected together. Thereby, the cloth material and the thermoplastic film are connected together to form thermoplastic composites with a varying shape.

Description

Method for molding thermoplastic composite

The invention relates to the technical field of the method for preparing a thermoplastic composite material, in particular to a structure which can make the thermoplastic film and the cloth material are tightly combined, can form a clear three-dimensional texture on the surface of the thermoplastic film, and can make the structure of the thermoplastic composite material. A molding method for a thermoplastic composite material having many effects such as variations.

A method for forming a conventional thermoplastic composite material, as shown in the Japanese Patent Application No. I269703, which is hereby incorporated by reference. Then, the extruder is used to hang the thermoplastic material on the release interface of the release mold layer above the guide wheel, and then a base cloth is wound on one of the runners on one side of the guide wheel to make the release mold a layer, the thermoplastic film and the base fabric pass through a contact point of the guide wheel and the rotating wheel, so that the three rollers are attached to each other by rolling the guide wheel and the rotating wheel, and then the release mold layer is peeled off A three-dimensional pattern corresponding to the uneven pattern can be formed on the surface of the thermoplastic film. However, such a rolling method using the two rollers causes the release mold layer, the thermoplastic film and the base fabric to be combined with each other and form a three-dimensional pattern, the degree of bonding is poor, and the resulting three-dimensional pattern is also less clear. . In particular, the molding method is only suitable for the production of a thermoplastic composite material in which the entire base fabric is completely combined with the entire surface thermoplastic film, and cannot be produced in different shapes. The base fabric is bonded with a thermoplastic composite of thermoplastic films of different shapes and sizes.

Another conventional method for forming a thermoplastic composite material, as shown in Taiwan Patent No. I266693, utilizes an upper mold and a lower mold to thermally press together a cloth material and a thermoplastic film. Thermoplastic composites incorporating thermoplastic films of different shapes and sizes on fabrics of different shapes. However, the cloth material and the thermoplastic film are directly pressed together by the hot pressing of the upper and lower molds, and the combined effect thereof is not good, and the three-dimensional texture which can be produced by using the concave and convex lines on the mold will also be Less clear. In addition, it also produces a wind phenomenon, which makes the texture reproducible and also makes the texture less clear.

It is known that the thermoplastic film and the cloth material are combined to form a thermoplastic composite material, which has a problem that the degree of bonding between the thermoplastic film and the cloth material is not good, the texture formed on the thermoplastic film is less clear, and the structure of the thermoplastic composite material is less changed.

The invention provides a method for molding a thermoplastic composite, comprising: cutting a thermoplastic film and a cloth into a predetermined shape, the thermoplastic film consisting of a surface layer and a bonding layer, the melting point of the surface layer The thermoplastic film is placed on the top surface of the stage of a molding machine, and the bonding layer is faced upward, and the cloth material is laminated on the upper side of the thermoplastic film to cover the film. The thermoplastic film has a plurality of air flow passages in the stage, and a plurality of concave and convex lines and a plurality of fine holes are disposed on a top surface of the stage, and the plurality of fine holes are uniformly disposed on a top surface of the stage And respectively passing through the plurality of air flow channels; heating the thermoplastic film by a heating unit to form a heat-fusible state of the bonding layer and softening the surface layer, The air in the plurality of air flow channels is extracted by a vacuuming unit and a pressing member is pressed against the upper side of the cloth. In this way, the thermoplastic film and the cloth material can be adsorbed downward by the plurality of micropores, and pressure is applied downward from the cloth material by the pressing member, so that the bonding layer of the thermoplastic film penetrates into the cloth. A tight fit is formed in the material, and the surface layer of the thermoplastic film forms a clear three-dimensional pattern corresponding to the embossed texture of the stage. Moreover, the thermoplastic composite can be composed of a variety of different shapes of thermoplastic film and cloth material, and thus the molded thermoplastic composite can have more structural changes.

The invention provides a method for molding a thermoplastic composite, comprising: cutting a thermoplastic film and a cloth into a predetermined shape, the thermoplastic film consisting of a surface layer and a bonding layer, the melting point of the surface layer The material is higher than the bonding layer; the cloth material is placed on the top surface of the stage of a molding machine, and the bonding layer of the thermoplastic film is stacked on the upper side of the cloth material, and the stage is placed on the upper side of the cloth. a plurality of air channels are disposed on the top surface of the stage, and a plurality of micropores penetrating into the air flow path are uniformly disposed on the top surface of the stage; and the thermoplastic film is heated by a heating unit to form a hot melt state of the bonding layer. The air in the plurality of air flow passages is extracted by a vacuuming unit and a pressing member is pressed against the upper side of the thermoplastic film. In this way, the thermoplastic film and the cloth material can be adsorbed downward by the plurality of micropores, and pressure is applied downward from the thermoplastic film by the pressing member, so that the bonding layer of the thermoplastic film penetrates into the cloth. Form a tight fit in the material. Moreover, the thermoplastic composite can be composed of a variety of different shapes of thermoplastic film and cloth material, and thus the molded thermoplastic composite can have more structural changes.

10‧‧‧ thermoplastic film

11‧‧‧ surface layer

12‧‧‧Fitting layer

20‧‧‧ cloth

30‧‧‧stage

31‧‧‧Air flow path

32‧‧‧ embossed road

33‧‧‧Micropores

34‧‧‧vacuum unit

40‧‧‧heating unit

50‧‧‧ Pressing parts

51‧‧‧ gas barrier film

52‧‧‧Molding

Figure 1 is a flow chart showing the fabrication of the first embodiment of the present invention.

Fig. 2 is an enlarged schematic cross-sectional view showing the thermoplastic film of the present invention.

Fig. 3 is a schematic view showing the operation of the thermoplastic film and the cloth material on the stage according to the first embodiment of the present invention.

Fig. 4 is a schematic view showing the operation of heating, vacuuming and pressing in the first embodiment of the present invention.

Figure 5 is a schematic view of the finished product of the thermoplastic composite of the first embodiment of the present invention.

Figure 6 is a flow chart showing the fabrication of the second embodiment of the present invention.

Figure 7 is a schematic view showing the operation of heating, vacuuming and pressing in the second embodiment of the present invention.

Referring to Figures 1 to 5, which are the first embodiment of the method for molding a thermoplastic composite according to the present invention, it is pointed out that the molding method of the thermoplastic composite comprises the following steps: (a) a thermoplastic The film 10 and a cloth 20 are cut into a predetermined shape, and the thermoplastic film 10 is smaller than the cloth 20. The thermoplastic film 10 is made of a thermoplastic polymer material and a colorant, and is mixed and formed by an extruder, which may be a plastic polyurethane elastomer resin (TPU) + stilbene-butene rubber (SBR), or Plastic polyurethane elastomer resin (TPU) + styrene (SEBS), or plastic polyurethane elastomer resin (TPU) + thermoplastic rubber (TPR), or plastic poly Any of urethane elastomer resin (TPU) + elastomer (EPDM), or plastic polyurethane elastomer resin (TPU) + TPU hot melt adhesive, or plastic polyurethane elastomer resin (TPU) + nylon elastomer. The color of the thermoplastic film 10 can be formed by any of a printing method, a coating color film method, or a surface interlayer method. The thermoplastic film 10 has a thickness of about 0.05 to 2.5 mm, and is composed of a surface layer 11 and a bonding layer 12 (as shown in FIG. 2). The surface layer 11 has a melting point higher than that of the bonding layer 1. High, the temperature of the melting point of the two differs by about 5 ° C or more. The cloth material 20 may be a plain woven fabric, a knitted fabric, a non-woven fabric or a sandwich mesh fabric, or the like.

(b) The thermoplastic film 10 is placed on the top surface of the stage 30 of a molding machine with the bonding layer 12 facing upward, and the cloth material 20 is laminated on the upper surface of the thermoplastic film 10 so that the thermoplastic film 10 is placed on the top surface of the stage 30. It covers the thermoplastic film 10 (as shown in Figure 3). The stage 30 has a plurality of air flow passages 31. The top surface of the stage 30 is provided with a plurality of concave and convex lines 32 and a plurality of fine holes 33. The plurality of concave and convex lines 32 may be the same pattern or may be several kinds. Different patterns. The plurality of fine holes 33 have a hole diameter of about 0.001 mm, and are uniformly disposed on the top surface of the stage 30 and penetrate the plurality of air flow paths 31, respectively.

(c) The thermoplastic film 10 is heated by a heating unit 40 to form a heat-fusible state of the bonding layer 12 and to slightly soften the surface layer 11. At the same time, the air in the plurality of air flow passages 31 is extracted by a vacuum unit 34 and a pressing member 50 is pressed against the top surface of the cloth member 20. The pressure-receiving member 50 includes a gas barrier film 51 and a stamper 52. The gas barrier film 51 has a higher melting point than the surface layer 11, and the material thereof may be rubber or keloid, etc., and the gas barrier film The 51 series covers the stage 30 and the cloth The upper side of the material 20 is press-fitted to the upper side of the gas barrier film 51.

Thus, when the vacuuming unit 34 performs vacuuming, a negative pressure state lower than atmospheric pressure is formed between the top surface of the stage 30 and the gas barrier film 51, and the negative pressure state can be used to block the resistance. The gas film 51 is adsorbed downward so that the gas barrier film 51 is pressed downward from above the cloth material 20, and at the same time, the stamper 52 is applied downwardly from the upper side of the gas barrier film 51, so that the gas film 51 can be applied. The bonding layer 12 of the thermoplastic film 10 penetrates into the cloth 20 to form a close fit. In particular, the thermoplastic film 10 and the cloth material 20 can be adsorbed downward by the plurality of micropores 33, so that the surface layer 11 of the thermoplastic film 10 can be formed corresponding to the concave and convex lines 32 of the stage 30. The three-dimensional pattern is clearer and more obvious (as shown in Figure 5). Moreover, the thermoplastic composite material produced by the molding method of the present embodiment can be directly composed of the cloth material 20 of various shapes and the thermoplastic film 10, so that it can have more structural changes, and it can be more It can be applied to make shoes, purses, hats, etc. by different shapes.

In the first embodiment, the pressing member 50 may include only the gas barrier film 51 and the stamper 52, and may be only one of the gas barrier film 51 or the stamper 52. For example, when the cloth gap of the cloth material 20 is large, only the gas barrier film 51 can be used. Moreover, the heating unit 40 can be disposed in the stage 30 or the stamper 52.

Referring to Figures 6 and 7, a second embodiment of the present invention is directed to the method of forming the thermoplastic composite comprising the following steps:

(a) cutting a thermoplastic film 10 and a cloth 20 into a predetermined shape The structure of the thermoplastic film 10 and the cloth 20 is the same as that of the first embodiment.

(b) The cloth material 20 is placed on the top surface of the stage 30 of a molding machine, and the bonding layer 12 of the thermoplastic film 10 is placed on the upper side of the cloth material 20 downward. The stage 30 has a plurality of air flow passages 31, and a plurality of fine holes 33 penetrating the air flow passages 31 are uniformly disposed on the top surface of the stage 30.

(c) heating the thermoplastic film 10 by a heating unit 40 to form a heat-fusible state of the bonding layer 12, while extracting the air in the plurality of air flow paths 31 and a pressing member by a vacuuming unit 34. A 50 pressure is provided on the top surface of the thermoplastic film 10.

Thus, when the vacuuming unit 34 performs vacuuming, a negative pressure state lower than atmospheric pressure is formed between the top surface of the stage 30 and the gas barrier film 51, and the negative pressure state can be used to block the resistance. The gas film 51 is adsorbed downward so that the gas barrier film 51 is pressed downward from above the thermoplastic film 10, and at the same time, the stamper 52 is applied downwardly from the upper side of the gas barrier film 51, and the plural is utilized. The fine pores 33 are caused to adsorb the thermoplastic film 10 downward through the cloth 20, so that the bonding layer 12 of the thermoplastic film 10 can be infiltrated into the cloth 20 to form a close fit. Moreover, the thermoplastic composite material produced by the molding method of the present embodiment can be directly composed of the cloth material 20 of various shapes and the thermoplastic film 10, so that it can have more structural changes, and it can be more It can be applied to make shoes, purses, hats, etc. by different shapes.

In the second embodiment, the pressing member 50 may include only the gas barrier film 51 and the stamper 52, and may be only the gas barrier film 51 or the stamper 52. One of them. For example, when the cloth gap of the cloth material 20 is large, only the gas barrier film 51 can be used. Moreover, the heating unit 40 can be disposed in the stage 30 or the stamper 52.

Claims (10)

A method for molding a thermoplastic composite material comprising: cutting a thermoplastic film and a cloth material into a predetermined shape, the thermoplastic film being composed of a surface layer and a bonding layer of one of the other side surfaces, the surface The layer has a higher melting point than the bonding layer; the thermoplastic film is placed on the top surface of the stage of a molding machine, and the bonding layer is faced upward, and the cloth material is laminated on the thermoplastic film. The side surface covers the thermoplastic film, and the stage has a plurality of air flow passages, and a plurality of concave and convex lines and a plurality of fine holes are arranged on the top surface of the stage, and the plurality of fine holes are uniformly arranged on the stage a top surface and a plurality of air passages are respectively penetrated; and the thermoplastic film is heated by a heating unit to form a heat-fusible state of the bonding layer and soften the surface layer, and the plurality of vacuum layers are extracted by a vacuuming unit Air in the air flow channel and pressing a pressing member on the upper side of the cloth material to adsorb the thermoplastic film and the cloth material downward by the plurality of micro holes and using the pressing member from the cloth material Apply pressure upwards to make the A plastic film layer bonded to penetrate the cloth material is formed rather tight fit, while the surface layer of the thermoplastic film may be formed to be uneven texture stage of a clear three-dimensional pattern pair. A method for molding a thermoplastic composite material comprising: cutting a thermoplastic film and a cloth material into a predetermined shape, the thermoplastic film being composed of a surface layer and a bonding layer of one of the other side surfaces, the surface The layer has a higher melting point than the bonding layer; the cloth material is placed on the top surface of the stage of the molding machine, and the bonding layer of the thermoplastic film is stacked on the upper side of the cloth material, Multiple in the stage a plurality of micropores penetrating into the air flow passage are uniformly disposed on a top surface of the stage; and the thermoplastic film is heated by a heating unit to form a heat fusion state of the bonding layer by Extracting the air in the plurality of air flow channels and pressing a pressing member on the upper side of the thermoplastic film to adsorb the thermoplastic film downward through the plurality of micropores and use the pressure The assembly is pressure applied downwardly from the top of the thermoplastic film such that the conformable layer of the thermoplastic film penetrates into the cloth to form a tight fit. The method of molding a thermoplastic composite according to claim 1 or 2, wherein the press-fit member is a stamper. The method of molding a thermoplastic composite according to claim 3, wherein the heating unit is provided in the stamper. The method of molding a thermoplastic composite according to claim 1 or 2, wherein the heating unit is provided on the stage. The method for molding a thermoplastic composite according to claim 1 or 2, wherein the pressing member is a gas barrier film having a melting point higher than the surface layer and covering the top surface of the stage . The method for molding a thermoplastic composite according to claim 1 or 2, wherein the press-fit member comprises a gas barrier film and a stamper having a melting point higher than the surface layer and covering the load The top surface of the table is press-fitted on the upper side of the gas barrier film. The method for molding a thermoplastic composite according to claim 1 or 2, wherein the thermoplastic film is a compound composed of a thermoplastic polymer material and a colorant, and is mixed and produced by an extruder. The method for molding a thermoplastic composite according to claim 1 or 2, wherein the thermoplastic film is a plastic polyurethane elastomer resin (TPU) + stilbene-butene rubber (SBR), or a plastic polyurethane elastomer resin (TPU). + styrene (SEBS), or plastic polyurethane elastomer resin (TPU) + thermoplastic rubber (TPR), or plastic polyurethane elastomer resin (TPU) + elastomer (EPDM), or plastic polyurethane elastomer resin (TPU) +TPU hot melt adhesive, or plastic polyurethane elastomer resin (TPU) + nylon elastomer. The method of molding a thermoplastic composite according to claim 1 or 2, wherein the color of the thermoplastic film is formed by any one of a printing method, a coating color film method, or a surface interlayer method.