JPH04253653A - Packaging material for ham/sausage casing - Google Patents

Abstract

PURPOSE:To improve the strength of a sealed part when a packaging material is made into a tube shape, and at the same time, improve the bag tear resistant strength, and increase the filling efficiency and yield, when the packaging material is used for a filling package of a ham or sausage. CONSTITUTION:A surface active agent treatment with saccharose fatty acid ester, etc., is applied on an unwoven fabric sheet which consists of a synthetic long fiber with a sheath and core strucutre, for which the melting point of a core component polymer is higher than the melting point of a sheath component polymer by 30 deg.C or more, to give viscose coating property.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging material for ham and sausage casings.

0002

BACKGROUND OF THE INVENTION Conventionally, packaging materials for ham casings, for example, have been used that have appropriate air permeability and moisture permeability. For example, it is known that paper is coated with a viscose liquid for rayon or cellophane in order to maintain appropriate air permeability and moisture permeability, and that paper is further coated with cardboard or cellophane by polymerization. When wrapping ham in such a packaging material, the packaging material must be cylindrical (tubular) in advance.
The cylindrical bag is rolled up and the longitudinal ends are joined with glue or the like, and the ham is filled into this cylindrical bag. Since the ends along the longitudinal direction are sealed with glue, the tensile strength and tear strength are low, and as a result, the bag tear resistance is low, including the sealed end portions, and there is a problem of frequent tearing. be. Therefore, the filling speed must be lowered to perform the work, resulting in a problem of poor workability. In addition, there is a problem that the bag is easily broken even at the distribution stage.

0003

[Problems to be Solved by the Invention] The present invention solves these problems, and aims to improve the bag breakage resistance, including the sealing strength of the joints between the ends, and further improves the structure. The purpose of this invention is to improve the speed at which hams and sausages are filled into the bags, thereby improving work efficiency.

0004

[Means for Solving the Problems] In order to solve this problem, the present invention provides a nonwoven fabric made of synthetic fibers with a core-sheath structure in which the melting point of the core component polymer is 30° C. or more higher than the melting point of the sheath component polymer. The sheet is treated with a surfactant such as sucrose fatty acid ester to give it viscose coating properties.

The present invention also provides a nonwoven fabric sheet made of synthetic fibers and having at least a two-layer structure, wherein one sheet made of a single polymer has a melting point of the polymer of the other sheet made of a single polymer. The melting point of the nonwoven fabric sheet is set at 30°C or more higher than the melting point of the polymer, and the nonwoven fabric sheet is treated with a surfactant such as sucrose fatty acid ester to impart viscose coating properties.

The present invention also provides a nonwoven fabric sheet made of synthetic fibers having a core-sheath structure in which the melting point of the core component polymer is 30° C. or more higher than the melting point of the sheath component polymer, and the sheath component polymer of this nonwoven fabric sheet. A nonwoven fabric sheet having at least a two-layer structure formed by laminating a nonwoven fabric sheet of synthetic fibers made of a single polymer having a melting point 30 ° C or more higher than the melting point of
This nonwoven fabric sheet is treated with a surfactant such as sucrose fatty acid ester to impart viscose coating properties.

Furthermore, the present invention provides a nonwoven fabric sheet made of synthetic fibers having a core-sheath structure in which the melting point of the core component polymer is 30° C. or more higher than the melting point of the sheath component polymer; At least a two-layer structure formed by laminating a nonwoven fabric sheet made of synthetic fibers having a core-sheath structure, the melting point of which is higher than the melting point of the polymer and the melting point of the sheath component polymer is higher than the melting point of the sheath component polymer of the long fibers. This nonwoven fabric sheet is treated with a surfactant such as sucrose fatty acid ester to impart viscose coating properties.

Next, the packaging material for ham/sausage casings of the present invention will be specifically explained. First, in a nonwoven fabric sheet made of synthetic fibers with a core-sheath structure, the polymer forming the core is polyamide such as polycapramide or polyhexamethylene adipamide, polyester such as polyethylene terephthalate or polybutylene terephthalate, or polypropylene. It will be done. The polymers that make up the sheath are polyolefins such as polyethylene, polypropylene, linear low-density polyethylene, polyethylene copolymers, terephthalic acid/isophthalic acid copolyester,
Polycapramide or the like is used.

[0009] Regarding the melting point relationship between the core component polymer and the sheath component polymer, the melting point of the core component polymer is higher than the melting point of the sheath component polymer by 30° C. or more, and this synthetic fiber with a core-sheath structure is When heat sealing the longitudinal ends of a nonwoven fabric sheet made of cylindrical material, only the sheath component polymer is melted and heat sealed.
Even if there is some variation in the temperature at which the sheath component polymer is melted, the core component polymer will not be melted, and the mechanical strength of the core component polymer can be maintained. Therefore, the core component polymer and the sheath component polymer are used in an appropriate combination so as to satisfy the above conditions.

[0010] Furthermore, in a nonwoven fabric sheet having a two-layer structure made of synthetic fibers, the polymer of one sheet is the same as the core component polymer, and the polymer of the other sheet is the same as the sheath component polymer. In this case, the melting point of one polymer is 30°C higher than the melting point of the other polymer.
The condition is that it be higher than that.

[0011] In addition, in a nonwoven fabric sheet having a two-layer structure in which a nonwoven fabric sheet made of synthetic fibers with a core-sheath structure is laminated with a nonwoven fabric sheet made of synthetic fibers of a single polymer, a core with a core-sheath structure is laminated. The component polymer used is the same as the core component polymer, and the sheath component polymer is the same as the sheath component polymer. In addition, the same polymer component as the core component polymer is used as the single polymer component, and in this case, the melting point of the core component polymer and the single polymer component having a core-sheath structure is 30° higher than the melting point of the sheath component polymer having a core-sheath structure. The condition is that the temperature is high.

Furthermore, in a nonwoven fabric sheet formed by laminating nonwoven fabric sheets made of synthetic fibers with a core-sheath structure into a two-layer structure, the same core component polymer is used in each layer, and the sheath component polymer in each layer is The melting point of the coalescence is lower than the melting point of the core component polymer, the melting point of the sheath component polymer in one layer is 30°C or more lower than the melting point of the core component polymer, and the melting point of the sheath component polymer in the other layer is higher than the melting point of the sheath component polymer of one layer.

[0013] The basis weight of the single-layer or multi-layer non-woven fabric sheet having the above structure is 15 g/m2 to 70 g/m2, and when ham or sausage is wrapped in this non-woven fabric sheet, the non-woven fabric sheet has an appropriate weight. It is necessary to apply a viscose liquid to the nonwoven fabric sheet to make it breathable and moisture permeable. In this case, since the nonwoven fabric sheet is made of synthetic fibers as mentioned above, the viscose liquid will not adhere to it in its original state, and therefore, the nonwoven fabric sheet will have an interface with sucrose fatty acid ester, etc., which does not pose a food hygiene problem as a food additive. Viscose coating properties are imparted to the nonwoven fabric sheet by impregnating it with an activator and treating it.

[0014] If necessary, the material of the nonwoven fabric sheet may contain an antioxidant, a matting agent, and the like. A viscose liquid for rayon and cellophane is applied to the nonwoven fabric sheet treated with a surfactant in this manner. Then, until the viscose liquid dries, cellulose paper made of natural pulp may be laminated on the nonwoven fabric sheet as necessary. In this case, the basis weight of the paper is preferably at least 5 g/m2, taking into account the uniformity of fiber deposition, smoothness, printability, etc. Paper weight is 5g/
If it is less than m2, the uniformity and smoothness of fiber deposition deteriorates, which is not preferable. Furthermore, cellophane or the like may be used instead of paper. These paper products, cellophane, and the like are pasted on the surface of the single-layer or multi-layer nonwoven fabric sheet that does not cover the low melting point component. For example, in the case of a multi-layer non-woven fabric sheet, it may be attached to the surface of the sheet made of a single polymer, and in the case of a single-layer non-woven fabric sheet with a core-sheath structure, it may be attached to any surface.

[0015]

[Operation] When packaging ham or sausage using the packaging material having the above structure, the packaging material is heat-sealed in advance by bringing the longitudinal ends of the packaging material together into a cylindrical shape having a predetermined outer diameter. That is, the packaging material is rolled into a cylindrical shape so that the low melting point component is located on the inner surface of the tube and the pasting surface of the paper or cellophane is located on the outside surface, and the low melting point components at the ends along the longitudinal direction are heat-sealed together. It is. Thereafter, ham or sausage is filled into the cylindrical packaging material.

[0016] At this time, the packaging material is made of a nonwoven fabric made of synthetic fibers as described above, and the high melting point component in the sealing portion along the longitudinal direction is not melted, and the low melting point component in the sealing portion along the longitudinal direction is not melted. Since the components are melted and sealed, it is possible to obtain sufficient tensile strength and tear strength compared to conventional packaging materials made of paper or cellophane, and to improve the tear resistance of the bag. As a result, even if the filling speed is increased, the yield can be improved, and the bag tear resistance during the distribution stage can also be improved.

[0017]

[Examples] Examples of the present invention will be explained in detail below. Note that the melting points in Examples were measured by the following method. Melting point (℃): Use a differential scanning calorimeter DSC-2 manufactured by Perkin Elma, sample amount is approximately 5 mg, and scanning speed is 2.
It was determined from a DSC curve obtained by measuring at 0° C./min.

Example 1 The sheath component was 50% by weight of a polyethylene polymer with a melting point of 128° C., the core component was 50% by weight of a polyethylene terephthalate polymer with a melting point of 258° C., and the fabric weight was 3 deniers. A 30 g/m2 non-woven fabric sheet was produced by a spunbond method, and sucrose fatty acid ester was added to the non-woven fabric sheet at a rate of 0.0 g/m2 based on the weight of the non-woven fabric sheet.
1% by weight, and then apply 15% viscose liquid on top.
g/m2 While coating, cellophane was attached to the viscose coated surface. Thereafter, it was immersed in a coagulation regeneration bath (composition: 136 g/l of sulfuric acid, 20 g/l of zinc sulfate, 260 g/l of ttrium sulfate, specific gravity 1.285) at 52°C.
Furthermore, it was washed with 50° C. warm water and dried.

When this was heat-sealed into a tube shape for use as a ham casing and filled with ham, the filling efficiency was 3 times higher than that of a conventional packaging material made of paper coated with viscose.
0% improvement, and yield also improved by 5%. Also, the problem of bag breakage during the distribution stage has been eliminated. Note that the strength of the seal portion was improved four times.

Examples 2 and 3 In place of the cellophane used in Example 1, the basis weight was 8 g/m.
When ham was filled and packaged using a packaging material using paper made from No. 2 (Example 2) and a packaging material (Example 3) in which neither cellophane nor paper was pasted on the viscose liquid applied surface,
Almost the same results as in Example 1 were obtained in terms of filling efficiency, yield, seal strength, and bag breakage resistance during the distribution stage.

Example 4 A non-woven fabric made of long fibers having a core-sheath structure with a thickness of 3 deniers, the sheath component being 50% by weight of polyethylene polymer with a melting point of 128°C, and the core component being 50% by weight of polyethylene terephthalate polymer having a melting point of 258°C. The sheet and a nonwoven fabric sheet made of long fibers of a single polymer of polyethylene terephthalate with a melting point of 258°C are continuously formed and laminated by the spunbond method to obtain a two-layer nonwoven fabric sheet with a basis weight of 30 g/m2. 0.1% by weight of sucrose fatty acid ester based on the weight of the nonwoven fabric sheet.
After that, cellophane was bonded to the viscose coated surface while coating the viscose liquid at 15 g/m 2 on the surface of a nonwoven fabric sheet made of long fibers of a single polymer of polyethylene terephthalate. After that, a 52°C coagulation regeneration bath (composition: 136 g/l of sulfuric acid, 20 g/l of zinc sulfate)
l, totrium sulfate 260 g/l, specific gravity 1.285
), further washed with warm water at 50°C, and dried.

[0022] When this was heat-sealed into a tube shape for ham casings and filled with ham, the filling efficiency was 3 times higher than that of the conventional packaging material made of paper coated with viscose.
0% improvement, and yield also improved by 5%. Also, the problem of bag breakage during the distribution stage has been eliminated. Note that the strength of the seal portion was improved approximately four times.

Examples 5 and 6 Cellophane used in Example 4 was replaced with a basis weight of 8 g/m.
When ham was filled and packaged using a packaging material using paper made from No. 2 (Example 5) and a packaging material (Example 6) in which neither cellophane nor paper was pasted on the viscose liquid applied surface,
Almost the same results as in Example 4 were obtained in terms of filling efficiency, yield, seal strength, and bag breakage resistance during the distribution stage.

Example 7 A non-woven fabric made of long fibers with a core-sheath structure having a thickness of 3 deniers and having a sheath component of 50% by weight of polyethylene polymer having a melting point of 128°C and a core component of 50% by weight of polyethylene terephthalate polymer having a melting point of 258°C. Sheet A and the sheath component have a melting point of 235
A nonwoven fabric sheet B consisting of long fibers with a core-sheath structure having a thickness of 3 deniers and 50% by weight of ethylene and terephthalic acid/isophthalic acid copolymer polyester at a temperature of 258°C, and a core component of 50% by weight of a polyethylene terephthalate polymer having a melting point of 258°C. After being formed and laminated continuously using the spunbond method,
Heat pressure welded at a temperature of 200℃ using a heat pressure welding device consisting of a pair of flat rolls and an engraved roll, resulting in a fabric weight of 30g.
/m2, a two-layered nonwoven fabric sheet is produced, 0.1% by weight of sucrose fatty acid ester is attached to the nonwoven fabric sheet based on the weight of the nonwoven fabric sheet, and then viscose is applied to the surface of the nonwoven fabric sheet B. 15g/m2 of liquid
While coating, cellophane was pasted onto the viscose coated surface. After that, a 52°C coagulation regeneration bath (composition: sulfuric acid 13
6 g/l, zinc sulfate 20 g/l, totrium sulfate 26
0 g/l, specific gravity 1.285), and further soaked at 50 g/l.
It was washed with warm water at °C and dried.

[0025] When this was heat-sealed into a tube shape for ham casings and filled with ham, the filling efficiency was 3 times higher than that of the conventional packaging material made of paper coated with viscose.
0% improvement, and yield also improved by 5%. Also, the problem of bag breakage during the distribution stage has been eliminated. Note that the strength of the seal portion was improved approximately four times.

Examples 8 and 9 The cellophane used in Example 7 was replaced with a basis weight of 8 g/m.
When ham was filled and packaged using a packaging material using paper made from No. 2 (Example 8) and a packaging material (Example 9) in which neither cellophane nor paper was pasted on the viscose liquid applied surface,
Almost the same results as in Example 7 were obtained in terms of filling efficiency, yield, seal strength, and bag breakage resistance during the distribution stage.

[0027]

[Effects of the Invention] As described above, according to the present invention, the packaging material is constructed based on a nonwoven fabric made of synthetic fibers, and the packaging material can be sealed by heat sealing when it is made into a tube. This makes it possible to significantly improve the strength of the seal compared to conventional glue bonding. Moreover, by using components with different melting points as the components constituting the nonwoven fabric sheet, and by setting the difference in melting point to 30°C or more, when the components with lower melting points are melted and heat-sealed, the temperature at the time of heat-sealing will be slightly different. Even if there is a margin of error, it is possible to maintain the strength of the sheet by preventing components with high melting points from melting. As a result, when the packaging material is made into a tube and used for filling and packaging hams and sausages, the packaging material has significantly improved filling efficiency, yield, and strength against tearing during the distribution stage compared to conventional packaging materials. Can be provided.

Claims (4)

[Claims] Claim 1: A nonwoven fabric sheet made of synthetic fibers with a core-sheath structure in which the melting point of the core component polymer is 30°C or more higher than the melting point of the sheath component polymer is treated with a surfactant such as sucrose fatty acid ester, and the A packaging material for ham/sausage casings that has been given course coating properties. 2. A nonwoven fabric sheet made of synthetic fibers and having at least a two-layer structure, wherein one sheet is made of a single polymer and the melting point of the other sheet is made of a single polymer. A packaging material for ham/sausage casings, which is obtained by treating the nonwoven fabric sheet with a surfactant such as sucrose fatty acid ester at a temperature 30°C or more higher than the melting point of the nonwoven fabric sheet to impart viscose coating properties. 3. A nonwoven fabric sheet made of synthetic fibers with a core-sheath structure in which the melting point of the core component polymer is higher than the melting point of the sheath component polymer by 30° C. or more, and the melting point of the sheath component polymer of this nonwoven fabric sheet. A non-woven fabric sheet with at least two layers is laminated with a non-woven fabric sheet of synthetic fibers made of a single polymer having a melting point higher than 30°C, and this non-woven fabric sheet is coated with a surfactant such as sucrose fatty acid ester. A packaging material for ham and sausage casings that has been treated to give it viscose coating properties. 4. A nonwoven fabric sheet made of synthetic fibers having a core-sheath structure in which the melting point of the core component polymer is 30° C. or more higher than the melting point of the sheath component polymer; A nonwoven fabric having at least a two-layer structure, which is formed by laminating a nonwoven fabric sheet made of synthetic fibers with a core-sheath structure, the melting point of which is higher than the melting point of the sheath component polymer, and the melting point of the sheath component polymer is higher than the melting point of the sheath component polymer of the long fibers. A packaging material for ham/sausage casings comprising a sheet, which is treated with a surfactant such as sucrose fatty acid ester to impart viscose coating properties to the nonwoven fabric sheet.