JPS627104Y2 - - Google Patents

Description

[Detailed explanation of the idea]

This invention relates to fiberglass casings.
Fibrous casings, which are used as filling and packaging materials for livestock meat such as hams and sausages, are produced by slitting wide base paper such as Japanese paper into the desired casing size, and then sealing both ends with a viscose coating machine to create an endless casing. Widely used are those formed into a cylindrical body, impregnated with viscose, and then coated with a polyvinylidene chloride (PVDC) coating on the inner surface. By the way, the surface of Japanese paper impregnated and coated with viscose (hereinafter referred to as viscose treated paper) is a rough surface with many unevenness, so it is necessary to apply PVDC thicker than necessary to prevent the occurrence of pinholes. There is. Furthermore, since the PVDC is applied to the inner surface of the cylindrical body, it becomes difficult to uniformly apply the PVDC, which also increases the amount of expensive PVDC applied, which increases the cost of the fiber casing. Furthermore,
Normally, viscose coating machines are capable of coating one type of product, and when fiber casings come in a variety of sizes, a coating machine is required for each size, resulting in high equipment costs. In view of the above circumstances, this invention allows the amount of PVDC used to be kept to the minimum necessary without impairing the moisture and gas barrier properties of the fiber casing, and does not require multiple types of viscose coating machines. The purpose is to provide fiberglass casings. That is, the fiber casing of this invention consists of a synthetic resin sheet laminated on the surface of processed viscose paper and a thin layer coated on the sheet.
It consists of a PVDC coating and is formed by sealing both ends of a casing material that has been slit from a wide width to the required casing size. This invention will be explained in detail below with reference to embodiments shown in the accompanying drawings. FIG. 1 shows a cross section of the casing material constituting the fibrous casing of this invention. That is, the synthetic resin sheet 3 is laminated on the upper surface of the Japanese paper 1, which is coated and impregnated with viscose while remaining wide, with the AC agent 2, which is an adhesive, interposed therebetween. Suitable synthetic resins include polyolefins such as low-density polyethylene and polypropylene, polyethylene terephthalate, and stretched polypropylene, and the synthetic resin sheet 3 may be a laminate of these. On the other hand, on the clean surface of the synthetic resin sheet 3, PVDC
A thin coating 4 is formed by coating. A suitable thickness of the coating 4 for practical use is 0.3 to 1.0 .mu.m. The casing material produced in this way is stored in its wide width and is slit into the required casing size when manufacturing the fibrous casing.
Then, tape 6 is heat-sealed to both ends of the slit casing material to seal the ends.
A cylindrical fibrous casing 5 is molded (FIGS. 2 and 3). The tape may be a laminate of stretched polyethylene film and polyethylene or unstretched polypropylene film, a laminate of viscose processed paper and polyethylene or polypropylene film, a laminate of polyethylene terephthalate film, polyethylene or unstretched polypropylene film, etc. Use as appropriate. Next, the test results of the water resistance and gas barrier properties of the fibrous casing of this invention and the conventional fibrous casing are shown in the table below. The fiber casing (example) of this invention used in the test was 20~
A 45μ thick low-density polyethylene sheet is laminated on a viscose processed paper made by coating and impregnating 30g/ ^m2 Japanese paper with 20~30g/ ^m2 of viscose, and then laminates a 45μ thick low density polyethylene sheet.
Using a casing material coated with a 0.7μ thick PVDC film, we applied it to a transversely-axially stretched polyethylene film.
It is constructed by laminating low-density polyethylene with a thickness of 30 to 50 microns and then heat-sealing both ends of the slit casing material with a tape coated with a PVDC coating of 0.3 to 0.7 microns.

【table】

[Table] As is clear from the table above, the fibrous casing of the example has no significant difference from the conventional product in terms of wet strength, pressure resistance, and filling boil test, and also has similar properties in terms of moisture permeability and gas permeability. It is not inferior to conventional products in terms of water resistance and gas barrier properties. As described above, the fibrous casing of this invention can reduce the amount of expensive PVDC used compared to conventional products without compromising water resistance or gas barrier properties. In addition, since the wide casing material is slit to the casing size and formed into a cylindrical shape when used, there is no need to use multiple types of viscose coating machines as with conventional products, and there is only one type of viscose coating machine. Casings of various widths can be manufactured by simply changing the fold width and sealing on a sheet machine. Therefore, the manufacturing cost of the fiber casing can be reduced, and the equipment cost can be kept low.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view showing an example of the casing material used in the fiber casing of this invention;
FIG. 2A is a front view showing an embodiment of the fiber casing of this invention made from the casing material shown in FIG. 1, and FIG. 2B is a perspective view of the fiber casing shown in FIG. 2A. It is. 1...Viscose processed paper, 3...Synthetic resin sheet, 4...Polyvinylidene chloride coating, 5...Fiberglass casing.

Claims (1)

[Claims for Utility Model Registration] 1. Consists of a synthetic resin sheet laminated to viscose processed paper and a thin layer of polyvinylidene chloride coating formed on the sheet, which is slit from a wide state to a casing size. Fiberglass casing is formed by sealing both ends of casing material. 2. The fibrous casing according to claim 1, wherein the thickness of the coating is within the range of 0.3 to 1.0μ.