JPH0222010A - Sheetlike molding material - Google Patents

Abstract

PURPOSE:To prevent curvature, bent from occurring at the time of transportation by providing carrier films having 1% or less of elongation rate or 3% or less of elongation at the time of styrene moistening for holding solid substance such as paste made of resin, filler, etc., glass fiber, etc. CONSTITUTION:Carrier films 2, 3 are excessively elongated at both ends laterally of compound 1, the elongated ends 2a, 3a are superposed together, folded to the upper face side, both end lugs 4, 4 are formed, both lateral ends of the compound 1 are closed to prevent the compound 1 from leaking laterally. The films have 1% or less of elongation against tension of 20kg/m of unit width and/or 3% or less of elongation at the time of moistening of styrene. Since the films which are scarcely elongated are employed, the deformation of the molding material at the time of vibration such as transportation is less.

Description

[Detailed description of the invention]

Industrial Application Field The present invention relates to a sheet-shaped molding material, in detail (j, a sheet-shaped molding + AI in which the upper and lower surfaces of a compound of a solid substance such as glass fiber and a paste-like substance such as a resin are sandwiched between carrier films, When the carrier film is wound into a roll on a cylindrical core tube for storage, the carrier film, which does not stretch easily, stretches, but the non-contact widthwise ends (edges) do not stretch, as shown in Figure 9. When the film is wound around the core tube A, it bends inward.Furthermore, the film F that is in contact with the compound C is wetted by the water lily pad, which is a component of the compound C, and stretches, but the non-contact ear part F-a is the same as above. It does not stretch, but similarly bends inward as shown in Figure 9.If the so-called "edge bending" phenomenon occurs and both ends are bent inward, as shown in Figure 10, The central part of the material is curved outward and does not become flat.This curvature does not easily return to its original shape when used after the material has thickened, and if you try to force it back to a flat surface, damage such as cutting of the ears will occur. Also, because it is curved, there are inconveniences such as the fact that it cannot be passed through an automatic cutting machine that cuts the sheet-shaped molding material during use.Secondly, the tensile force during winding causes the film to When stretched, the compound near the core tube becomes thinner, making it impossible to obtain a uniform thickness.Thirdly, as described in the first and second sections above, the rolled-up molding material curves, and Equalize the thickness by using a luno, and take a Δ:
(To prevent the occurrence of curvature/gloss in the width direction in 4), 2, to maintain the flat surface, 5, 5, j-)]. 1st floor of Hatome Shoji Traditionally, this type of resin was used as the main ingredient, A-Pace I-like material, and Sphi-I powder was sandwiched between carrier films to form a flexible sheet. Molding 111 (
, J. Immediately after manufacturing, it is difficult to maintain the shape. In particular, for transportation and storage, in the production process, continuous to the production of the sheet-shaped molded moon 11, and cylindrical. Various problems have occurred when attaching 85 to a shaped core tube. First, films made of polyethylene or polypropylene have conventionally been used as kitryar films, and these types of films have a relatively large elongation rate with respect to tensile force. When winding, if the winding force is weak, the winding cross section will not be a perfect circle, so you may need to wind it with some force.
Thread 'M' is wound with a tensile force of 20 kg/m or more. When using a gear film of 1.Q is 1
The limit is 50 to 160 kg, and it is usually set to loOkg. However, if the number of rolls per roll is small, it takes time and labor to rewind the roll during production, which poses a problem in terms of productivity. However, for users who manufacture molded products using this type of molded feed, when press forming large molded products, the number of rolls used increases, which also increases the weight of one roll. is required. In particular, with the recent demand for rationalization due to soaring labor costs, molding methods for molded products have changed from the labor-intensive hide-up and spray-up methods to SMC, TMC,
Press molding using molding materials such as BMC is becoming mainstream, and molded products are also becoming larger, such as bathtubs, waterproof pans, and bathtubs with a washing area. molding materials are required. However, in the case of thick TMC, the weight per unit area is large, and it is difficult to make the thickness uniform, and moreover, it is difficult to return when curved. However, the winding method is not adopted. Therefore, they are either stored in saw-shaped boxes, or in this case, there are problems in that productivity is low and it is difficult to meet demands for larger sizes. Fourth, the paste-like material and glass fiber compound is very flexible as soon as it is manufactured, so when it is rolled up, there is a problem that it protrudes beyond the edges of the carrier film on both the upper and lower sides, especially when the tensile force is high and However, when the winding weight increases, leakage from both ends increases, making it difficult to maintain a uniform thickness in the width direction. OBJECTS TO BE SOLVED BY THE INVENTION Accordingly, the present invention aims to provide a new sheet-like molding material that solves the two problems mentioned above. That is, the sheet-shaped molding material according to the present invention uses a carrier film that has a low tensile force and a low elongation rate with respect to styrene, thereby eliminating curvature and bending that occur during winding, and making the wall thickness uniform. The carrier film with a low elongation rate described above can be formed from polyester (PET), nylon, cellulose acetate, cellophane, stretched polypropylene, polystyrene, polyvinylidene chloride, polyvinyl alcohol, paper, etc. A film is preferably used. The carrier film may be used by overlapping the film in contact with the compound, or the carrier film and the film in contact with the compound may be laminated on the front side. In this case, When using this compound, these films have the advantage of being easily peeled off from the compound. Polyethylene, polypropylene, etc. are preferably used as the film in contact with this compound, and the thickness of the film is 10
When the thickness is about 50μ, it is preferable that the film made of polyester, nylon, etc. used as a carrier film with a low elongation rate for the outer layer has a thickness of about 5 to 50μ. The above-mentioned carrier film allows the surplus portions extending from both ends of the compound in the width direction to increase Ui1 at the same time. In this way, it is possible to increase the winding weight, which makes it possible to increase the monthly yield of sheet-like molding by winding it into one roll, and in particular, it is possible to roll and manufacture thick TMC. It is. Furthermore, both ends of the carrier film in the width direction are folded back to eliminate leakage of the compound. Means for Solving the Problems - 1 - Achieving the stated objectives "4 - In order to achieve the above-mentioned objectives, the present invention provides a method for forming a compound of a paste-like substance consisting of a mixture of a resin, a filler, etc. and a solid substance such as glass fiber. In a sheet-shaped molded material sandwiched between carrier films, the sheet-shaped molded material is wound around a cylindrical core tube, in which at least one side of the gear film is 2.
Elongation gravity q% or less for tensile strength of 0 kg/m, and/
Alternatively, the present invention provides a sheet-like molding material characterized by using a material having an elongation rate of 3% or less when wetted with lily pad. It may be folded back in the opposite direction to create a sliding configuration to prevent side leakage of the compound. The above-mentioned compound for sheet-shaped molding is made of paste-like materials such as unsaturated polyester resin, liquid resin such as polystyrene, liquid styrene monomer, powdered calcium carbonate, filler such as aluminum hydroxide, etc. Internal mold release agents such as zinc stearate and carunium stearate, catalysts such as liquid or paste 13 PO (penzoyl peroginde) and TBPB (t-butyl perbenzoate), and powder H Q (hydroquinone). ), PBQ (Barahenzoquinone) is a compound solution prepared by mixing seven stabilizers, a thickener made of MgO paste (Magnenoor paste), and various coloring agents made of liquid. The glass fiber used as a reinforcing material for the solid substance to be mixed with is made by cutting a 12 μm, TEX 4630 glass row hinge into a predetermined length of about 50 mm. Function: By winding up the compound into a roll with both sides covered with the gear carrier film, deformation due to elongation of the carrier film that occurs during winding can be suppressed. y), the winding weight was reduced to 100% compared to the conventional
It is possible to increase the weight from kg to 1000 kg, and it is natural that it can be applied to thin SMC, but it can also be applied when manufacturing TMC that is about three times as thick as the SMC (about 5 to 10 mm). It is something. This kind of SMC,T
Large sheet-shaped molding materials made of MC can be suitably used as materials for large molded products for various uses by press molding.
For example, housing equipment such as bathtubs, waterproof pans, water tank panels, and balconies, air spoilers, air intakes, roofs, side panels, engine hoods, chairs, trays, parabolic antennas, etc. for automobile equipment can be suitably manufactured. Below, the present invention will be explained in detail with reference to embodiments shown in the drawings. FIG. 1 shows the second lumen of the sheet-like molding material according to the present invention.
3 are both made of films with a small elongation rate, but only one side may be made of the film with a small elongation rate. The sheet-shaped molding material shown in FIG. 2 shows a second embodiment of the present invention, and is made of compound 1 and compound 1 so that the user can easily peel off the carrier film 2.3 when using the molding material. A two-layer laminate film is used as the gear film 2.3, in which polyethylene or polypropylene films 5.6 are laminated at 2° and 3°, each having a low elongation rate, on the contact side of the gear film 2.3. This laminate film 2.3 is made into a two-layered film by applying an adhesive to the polyethylene or polypropylene film 5.6 after producing the film 2.3°. The thickness of the two-layer carrier film is, for example, the thickness of the inner layer film is about 10 to 50 μm, while the thickness of the film made of polyester, nylon, etc. used as the outer layer film is about 5 to 50 μm. It is said that 4 shows the cross section of the sheet-like molded material shown in FIGS. 1 and 2 above, where 1 is the compound and 2.3 ("
This is a carrier film that holds the upper and lower surfaces of Compound I. The carrier film 2.3 extends extra in the width direction of the compound I, and the two end portions 2a and 3a of the carrier film are overlapped together as shown in the figure, folded back to the - side, and both ends are folded. Ears 4.4 are formed to close both ends of the compound 1 in the width direction to prevent the compound I from leaking into the groove. "-1; Koji) = Yarya film 2.3 is Firno, which does not stretch easily. The gear film is made of a polyester (P
ET), nylon, cellulose acetate, cellophane,
A gear film 2.3 is formed from stretched polypropylene, borisdyrene, polyvinylidene chloride, polyhinyl alcohol, paper, or the like. In the illustrated embodiment, the carrier filler on both sides of the lower surface of "1" is as follows:
As described above, both ends of the carrier film 2.3 are folded back, and the compound 1 is prevented from protruding from both ends in the width direction. From the impregnation step in which the conopound 1 produced in step 10 is sandwiched between upper and lower carrier films 2.3 (or a two-layered carrier film with a laminate film), a cylindrical core tube 11 is formed.
It is installed in the conveyance process to the winding process where it is wound into a roll. As shown in FIGS. 4 to 6, the folding means includes a folding bar 12 that folds both ends 2a, 3a of the carrier film 2.3 upward, and then folds both ends 2a, 3a of the carrier film 2.3 upward. A pressing roller 13 that is folded downward is installed, and both end portions 2a and 3a are folded back onto the upper surface of the upper carrier film 2 in a stacked state to form an ear portion 4. The length of the folded ear portion 4 is the length of the folded ear portion 4.
If the width of the river is loocm, it is approximately 10cm. Note that the shape of the folded portions at both ends of the carrier film 2.3 is not limited to the above embodiment, and may be formed, for example, as shown in FIG. It is sufficient to form a closing portion that does not protrude beyond both ends. As shown schematically in FIG. Cutting and impregnating roller 20.2
0' and the impregnating roller 20.20
A pipe 24 for supplying a paste substance 23 onto the surface of
．． 2/I', and therefore the impregnating roller 20.
The lower carrier film 3 impregnates the glass fibers into the pasty substance 23 as it passes through the 20° gap and moves this impregnated compound downwards along the plane of the roller 20.20'' and is fed into the lower position. Then, it is covered with the top carrier film 2 and transported from the folding position to the roll winding position on the downstream side, where it is wound up with the cylindrical core tube 11. The paste-like substance that is a component of the above compound 1 includes unsaturated polyester resin, polyester resin, etc.

[Frozen U
P-201 (manufactured by Steel Chemical Co., Ltd., powder polyethylene)
5 parts by weight [Ternary butyl perogine benzoate] (organic peroxide)
1 part by weight

[Rose benzoginone] (stabilizer) 001 parts by weight

[Zinc stearate] (internal mold release agent) 3 parts by weight

[Super SSM (manufactured by Maruo Calcium Co., Ltd., calcium carbonate) 100 parts by weight [Glass fiber 5M-1,
4(]”)] (Roving glass, manufactured by Nippon Glass Fiber Co., Ltd.) 90 parts by weight Case (A) in which a conventional polyethylene film is used as a carrier film sandwiching both the upper and lower surfaces (outside, inside) of the above compound, and the case of the present invention (B)-2 when using gear film related to
Manufactured types. Conventional example (A) Outside (top side in Figures 1 and 2)
The inside is 35μ polyethylene, and the inside is 35μ polyethylene. Invention example (B): The outside is made of 12 μm polyester, and the outside is made of 30 μm polyester.
Liquid resin such as μ polyethylene laminate, liquid styrene monomer, filler such as powder carbonate, aluminum hydroxide, internal mold release agent such as powder zinc stearate, carunium stearate, liquid or paste. 131) Mix a catalyst consisting of ○ (henzoyl peroquinde) and TBPB (t-butyl perbenzoate), and a stabilizer such as H Q (hydroquinone) and PBQ (barahenzoquinone) consisting of powder. A mixture of a thickening agent made of MgO paste (magnesia paste) and various coloring agents made of liquid is used in the compound liquid. (Experiment example) A TMC with a product width of 1m and a unit thumb of 9kg/mxm,
100 m (weight 900
kg) and after completion of ripening, the product was cut into 1 m portions and weighed, and at the same time, the external appearance of the product was observed. The ingredients of the product compound were as follows. [Polymer 6409] (manufactured by Takeda Pharmaceutical Co., Ltd.,
(unsaturated polyester resin) 100 parts by weight, so that the polyethylene side was in contact with the comparand. The inside is 40μ polypropylene. Two types of products, the conventional example (A) and the invention example (B), described above, were manufactured and compared and studied, and the results are as follows.・Conventional example of external appearance check (A) ・Since the edges of the product pass through the cutting machine with a slight bending, if a load is applied to the product to make it flat, the edges of the product will be removed before passing through the cutting machine. was torn. Example (B) of the present invention - "Since there is no sagging, when the product is rewound, it becomes flat without applying any force, so it was possible to cut it to the specified size without any problem. ・Weight check product of 1m x Im cut sample was rolled. While returning it, it was cut into pieces of 1 m and their weights were measured, and the differences between the conventional example (A) and the present invention example (B) were compared.The results are shown in Fig. 8. B) had less variation in weight. From this result, it can be said that the inventive example achieved almost uniform thickness in the width direction and winding direction. Furthermore, in the above experimental example, the inventive example (B ), the laminate film in the above experimental example was made thinner, with the outer layer made of 12 μm polyester and 30 μm polyester.
When we produced and compared products with a laminate of μ polyethylene with the polyethylene side in contact with the compound and a product with a 20μ polypropylene inside, the results were as follows: ) exactly the same results were obtained. Effects of the Invention As is clear from the above explanation, the sheet-shaped molding material according to the present invention has a compound (molding material) sandwiched between them.
The film on at least one side of the carrier film on the descending side is a film that does not stretch easily when it is rolled up, and has a very small elongation rate when it is swollen by the tension force when it is rolled up. Sometimes, the so-called figure is a sectional view showing another folding method, Fig. 8 is a graph showing the experimental results comparing the molding material of the present invention and a conventional molding material, and Fig. 9 is a cross-sectional view showing another folding method. A drawing illustrating the problem that occurs is FIG. 10, which is a cross-sectional view of a conventional curved molding material. 1. Compound, 2.3. Carrier film, 4 Ear portion, 5.6. Inner layer of laminate film, 10. Impregnation device, ■1. Cylindrical core tube. Patent applicant Takeda Pharmaceutical Co., Ltd. Patent attorney Aoyama Aoyama and two others Can you prevent the occurrence of ear cramps? Therefore, it is possible to maintain the flatness in the width direction in the roll-wound state, and in order to solve the conventional problems, it is possible to increase the weight of one roll to about 1000 kg. Therefore, the thickness width 'J'' which was previously impossible.
Roll winding of MC becomes possible, and productivity of TMC can be improved. Moreover, since it is possible to increase the weight per roll, it is possible to provide molding materials with larger dimensions in either TMC or SMC.
It has various advantages such as being suitable for use as a molding material for large molded products.

[Brief explanation of the drawing]

Claims (8)

[Claims] (1) A sheet-shaped molding material in which the upper and lower surfaces of a compound of a paste-like substance consisting of a mixture of resin, filler, etc. and a solid substance such as glass fiber are sandwiched between carrier films, and the sheet-shaped molding material is shaped into a cylindrical shape. 20 kg as a carrier film on at least one side of the material wound on the core tube.
The elongation rate with respect to a tensile strength of /m is 1% or less, and/or
A sheet-shaped molding material characterized by using a material having an elongation rate of 3% or less when wetted with styrene. (2) The carrier film with low elongation rate according to claim (1) is a film formed from polyester (PET), nylon, cellulose acetate, cellophane, stretched polypropylene, polystyrene, polyvinidene chloride, polyvinyl alcohol, paper, etc. A sheet-shaped molding material characterized by using. (3) A sheet-like molding material characterized in that the carrier film is a laminate film obtained by attaching polyethylene, polypropylene, etc. by self-adhesion during extrusion molding to the low elongation film according to claim (1). (4) A film made of polyethylene or polypropylene is adhered to the low elongation film according to claim (1), and is in contact with the compound via the polyethylene or polypropylene film, so that the carrier film has a two-layered structure. Sheet-shaped molding material. (5) In the molding material according to claim (4), the inner layer of the laminate film has a thickness of about 10 to 50 μm, while the outer layer film made of polyester, nylon, etc. has a thickness of about 10 to 50 μm. A sheet-shaped molding material characterized by having a thickness of about 5 to 50μ. (6) A sheet-like molding material, characterized in that the carrier film with a low elongation rate according to claim (1) or (4) is attached to both upper and lower surfaces of a compound. (7) A sheet-shaped molding material characterized in that, of the carrier films sandwiching the compound according to claim (1), both ends in the width direction of at least one side of the carrier film are folded back to the other side of the carrier film. (8) The compound according to claim (1) is a paste-like substance containing a resin such as unsaturated polyester resin or polystyrene, a filler such as calcium carbonate, a styrene monomer, an internal mold release agent such as zinc stearate, and BPO. A sheet-like molding material which is a mixture of a catalyst such as HQ, a stabilizer such as HQ, a thickener such as MgO, and a coloring agent, and the solid material mixed with the paste-like material is glass fiber.