JP2636971B2 - Packaging material for ham and sausage casing - Google Patents

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 / sausage casing.

[0002]

2. Description of the Related Art Hitherto, for example, a ham casing packaging material having a suitable air permeability and moisture permeability has been used. For example, a paper coated with a viscose liquid for rayon or cellophane in order to maintain appropriate air permeability and moisture permeability on paper, and a paper coated with cardboard or cellophane thereon are known. When wrapping ham in such a packaging material, the packaging material must be tubular (tube-shaped) in advance.
The ends along the longitudinal direction are joined together with glue, etc., and the ham is filled in this cylindrical bag. Since the ends along the longitudinal direction are sealed by glue bonding, the tensile strength and the tear strength are small, and as a result, the strength of the bag, including the sealing portion at the end, is small, and the breakage frequently occurs. is there. Therefore, the work must be performed at a lower filling speed, and there is a problem that workability is poor. There is also a problem that the bag is easily broken even at the distribution stage.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and aims at improving the strength against ruptured bags, including the improvement in the sealing strength at the joints between the end portions, and furthermore, the structure. It is an object of the present invention to improve the filling speed of ham or sausage into the filled bag and improve the working efficiency.

[0004]

SUMMARY OF THE INVENTION In order to solve this problem, the present invention relates to a nonwoven fabric made of synthetic filaments having a core-sheath structure in which the melting point of a core component polymer is 30 ° C. or more higher than the melting point of a sheath component polymer. The sheet is treated with a surfactant such as a sucrose fatty acid ester to impart viscose coatability.

[0005] The present invention also provides a nonwoven fabric sheet composed of synthetic filaments and having at least a two-layer structure, wherein one sheet composed of a single polymer has a melting point of the polymer of the other sheet composed of a single polymer. 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 coatability.

The present invention also relates to a nonwoven fabric sheet made of synthetic filaments having a core-sheath structure in which the melting point of the core component polymer is at least 30 ° C. higher than the melting point of the sheath component polymer, and a sheath component polymer of the nonwoven fabric sheet. A nonwoven fabric sheet of at least a two-layer structure obtained by laminating a nonwoven fabric sheet of a synthetic long fiber composed of a single polymer having a melting point of 30 ° C. or more higher than the melting point of the nonwoven fabric sheet. A surfactant treatment is applied to impart viscose coatability.

Further, the present invention provides a sheet made of a nonwoven fabric made of synthetic filaments having 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. An at least two-layer structure obtained by laminating a nonwoven fabric sheet made of a synthetic filament having a core-sheath structure higher than the melting point of the polymer and having a melting point of the sheath component polymer higher than the melting point of the sheath component polymer of the long fiber. The nonwoven fabric sheet is treated with a surfactant such as a sucrose fatty acid ester to impart viscose coatability.

Next, the packaging material for a ham / sausage casing of the present invention will be specifically described. First, in a nonwoven sheet made of synthetic filaments having a core-sheath structure, the polymer constituting the core portion is polyamide such as polycapramide or polyhexamethylene adipamide, polyester such as polyethylene terephthalate or polybutylene terephthalate, or polypropylene. Can be The polymer constituting the sheath portion is polyethylene or polypropylene, linear low-density polyethylene, polyolefin such as polyethylene copolymer, terephthalic acid / isophthalic acid copolyester,
Polycapramide or the like is used.

In relation to the melting point of the core component polymer and the sheath component polymer, the condition is that the melting point of the core component polymer is 30 ° C. or higher than the melting point of the sheath component polymer. When heat-sealing the ends of the nonwoven fabric sheet made of synthetic filaments having a core-sheath structure into a cylindrical shape along the longitudinal direction, only the sheath component polymer is melted and heat-sealed. By setting the melting point difference between the polymer and the sheath component polymer to 30 ° C. or more, even if there is some variation in the temperature at which the sheath component polymer is melted, the core component polymer is not melted, and the core component weight is not increased. The mechanical strength of the coalescence 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. For example, polyhexamethylene adipamide (6,6-nylon) is used as the core component polymer, and polycapramide (6-nylon) is used as the sheath component polymer.
When using nylon), the melting point of polyhexamethylene adipamide is 250 ° C, and the melting point of polycapramid is 215 ° C.
℃ (published by Kyoritsu Publishing Co., Ltd. on September 10, 1969)
Chemical Dictionary 8 Chemical Dictionary Editing Committee P732 Table I,
See Table II). In this case, the difference between the two melting points is 35 ° C. When polypropylene is used as the core component polymer and polyethylene is used as the sheath component polymer, the melting point of polypropylene is 165 ° C to 173 ° C, and the melting point of polyethylene is 125 ° C to 135 ° C (December 1974) 1975 Synthetic Fiber Handbook, published by the Japan Chemical Fiber Association, P210 to P211. Performance Table (IV). In this case, the difference between the two melting points is 40 ° C.
Before and after (30 ° C to 48 ° C). Further, polyethylene terephthalate (melting point: 258 ° C.) was used as the core component polymer, and polypropylene (melting point: 165 ° C. to 173 ° C.) was used as the sheath component polymer.
° C), the difference between the melting points of the two is around 90 ° C (85 ° C to 93 ° C).
° C). Further, when polyethylene terephthalate (melting point: 258 ° C.) is used as the core component polymer and polyethylene (melting point: 128 ° C.) is used as the sheath component polymer, the difference between the two is 130 ° C. By making the melting point difference between the core component polymer, that is, the component having a high melting point, and the sheath component polymer, that is, the component having a low melting point, 30 ° C. or more, the component having a low melting point is required to make the packaging material cylindrical. When melting and heat sealing, even if there is some variation in the temperature at which the low melting point component is melted, it does not lead to melting the high melting point component,
A component having a high melting point can maintain a fiber form and maintain sheet strength. As a result, when the packaging material is formed into a tube and used for filling and packaging ham or sausage, characteristics such as filling efficiency, yield, and breaking bag resistance at the distribution stage can be improved.

[0010] In a two-layer nonwoven fabric sheet made of synthetic long fibers, the polymer of one sheet is the same as the core component polymer, and the polymer of the other sheet is the sheath component polymer. In this case, the condition is that the melting point of the polymer of one sheet is higher than the melting point of the polymer of the other sheet by 30 ° C. or more. The melting point difference between the polymer on one sheet and the polymer on the other sheet
The selection of the polymer for raising the temperature to 30 ° C. or higher may be based on the same idea as described above.

In a two-layer non-woven fabric sheet obtained by laminating a non-woven fabric sheet made of synthetic filaments having a core-sheath structure with a non-woven fabric sheet consisting of synthetic long fibers of a single polymer, As the component polymer, the same as the core component polymer is used, and as the sheath component polymer, the same as the sheath component polymer is used. The single polymer component is the same as the core component polymer.In this case, the melting points of the core component polymer having the core-shell structure and the single polymer component are 30% lower than the melting points of the sheath component polymer having the core-shell structure. It is required that the temperature be higher by ℃.

Further, in a nonwoven fabric sheet obtained by laminating a nonwoven fabric sheet made of a synthetic filament having a core-sheath structure into a two-layer structure, the same core component polymer is used for each layer, and the sheath component weight of each layer is used. The melting point of the united polymer 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 in one layer.

[0013] The above single-layer or basis weight of the nonwoven sheet of the multilayer structure such as is ^{15g / m 2 ~70g / m 2} , the nonwoven fabric sheet when wrapped ham and sausages in the non-woven fabric sheet It is necessary to apply a viscose liquid to a non-woven fabric sheet in order to have appropriate air permeability and moisture permeability. In this case, since the nonwoven fabric sheet is composed of synthetic filaments as described above, the viscose liquid does not adhere to the nonwoven fabric sheet as it is. The viscose coatability is imparted to the nonwoven fabric sheet by impregnating and treating with an activator.

If necessary, the material of the nonwoven fabric sheet may contain an antioxidant, a matting agent and the like. The viscose liquid for rayon and cellophane is applied to the nonwoven sheet treated with the surfactant in this manner. Until the viscose liquid dries, a cellulosic paper made of natural pulp may be laminated on the nonwoven fabric sheet if necessary. In this case, the basis weight of the paper is preferably at least 5 g / m ² in consideration of the uniformity of fiber deposition, smoothness, printability, and the like. The basis weight of papermaking is 5g /
If it is less than m ² , the uniformity and the smoothness of the fiber deposition are undesirably reduced. Cellophane or the like may be used instead of papermaking. These papermaking, cellophane, and the like are attached to 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 nonwoven sheet, it is attached to a sheet surface made of a single polymer,
In the case of a nonwoven sheet having a single-layer core-sheath structure, the sheet may be attached to any surface.

[0015]

When ham or sausage is wrapped using the wrapping material having the above-described structure, the wrapping material is heat-sealed in advance so that the ends along the longitudinal direction are joined together so as to have a cylindrical shape having a predetermined outer diameter. That is, the low-melting-point component is rolled into a cylindrical shape so that the paper-making and cellophane attachment surfaces are positioned on the outer surface, and the low-melting-point components at the ends along the longitudinal direction are heat-sealed. It is. Then, ham and sausage are filled in a cylindrical packaging material.

At this time, the wrapping material is made of a nonwoven fabric of synthetic long fibers as described above, and the high melting point component of the seal portion along the longitudinal direction is not melted, and the low melting point component of the seal portion along the longitudinal direction is not melted. Is melted and sealed, so that a sufficient tensile strength and tear strength can be obtained as compared with those made of conventional paper or cellophane as a packaging material, and the bag-breaking resistance can be improved. As a result, even if the filling speed is increased, the yield can be improved, and further, the breakage resistance at the distribution stage can be improved.

[0017]

Embodiments of the present invention will be specifically described below. In addition, the melting point in an Example was measured by the following method. Melting point (° C.): using a differential scanning calorimeter DSC-2 manufactured by PerkinElmer, using a sample amount of about 5 mg and a scanning speed of 20
It was determined from a DSC curve obtained by measuring at ° C./min.

Example 1 50% by weight of a polyethylene polymer having a melting point of 128 ° C. as a sheath component and a polyethylene terephthalate polymer having a melting point of 258 ° C. as a core component
A nonwoven fabric sheet having a basis weight of 30 g / m ² and made of 50% by weight of 3 denier core-sheath type composite long fiber was manufactured by a spunbond method, and a sucrose fatty acid ester was added to the nonwoven fabric sheet based on the weight of the nonwoven fabric sheet. Then, cellophane was adhered to the viscose-coated surface while the viscose solution was coated thereon at 15 g / m ² . Thereafter, a coagulation regeneration bath at 52 ° C. (composition: sulfuric acid 136 g / l, zinc sulfate 20 g / l, thorium sulfate 260 g / l, specific gravity 1.285)
, And then washed with 50 ° C warm water and dried.

When this was used for a ham casing and heat-sealed in a tube shape and filled with ham, the filling efficiency was 30 times lower than that of a conventional packaging material in which viscose was applied to paper.
% And the yield also improved by 5%. In addition, the problem of bag breakage at the distribution stage has been eliminated. The strength of the seal is 4
Improved by a factor of two.

Examples 2 and 3 Instead of the cellophane used in Example 1, a basis weight of 8 g / m 2 was used.
^When ham was filled and packaged using the packaging material using the paper making of Example 2 (Example 2) and the packaging material (Example 3) in which cellophane and paper making were not bonded to the surface coated with the viscose liquid, the filling efficiency and yield were obtained. Approximately the same results as in Example 1 were obtained for the strength of the sealing portion, and the strength against breakage of the bag during the distribution stage.

Example 4 50% by weight of a polyethylene polymer having a melting point of 128 ° C. as a sheath component, and a polyethylene terephthalate polymer having a melting point of 258 ° C. as a core component
A 50% by weight non-woven sheet made of long fibers of a 3 denier core-sheath structure and a non-woven sheet made of long fibers of a single polymer of polyethylene terephthalate having a melting point of 258 ° C are continuously formed by a spun bond method. To produce a two-layer nonwoven fabric sheet with a basis weight of 30 g / m ² ,
0.1% by weight of a sucrose fatty acid ester was attached to the nonwoven fabric sheet based on the weight of the nonwoven fabric sheet. Then, the surface of the nonwoven fabric sheet composed of long fibers of a homopolymer of polyethylene terephthalate was coated with 15 g / m ² of a viscose liquid. Cellophane was attached to the viscose-coated surface. Thereafter, a coagulation regeneration bath at 52 ° C (composition: sulfuric acid 136 g /
l, zinc sulfate 20 g / l, thorium sulfate 260 g / l, specific gravity 1.285), washed with warm water at 50 ° C and dried.

When this was used for a ham casing and heat-sealed in a tube shape and filled with ham, the filling efficiency was 30% less than that of a conventional packaging material in which viscose was applied to paper.
% And the yield also improved by 5%. In addition, the problem of bag breakage at the distribution stage has been eliminated. In addition, the strength of the seal part was improved about four times.

Examples 5 and 6 Instead of the cellophane used in Example 4, the basis weight was 8 g / m.
^When the ham was filled and packaged using the packaging material using the paper making of Example ² (Example 5) and the packaging material (Example 6) in which cellophane and paper making were not bonded to the surface coated with the viscose liquid, the filling efficiency and the yield were improved. Approximately the same results as those of Example 4 were obtained in the strength of the sealing portion, and the strength of the bag to be broken during the distribution stage.

Example 7 50% by weight of a polyethylene polymer having a melting point of 128 ° C. as a sheath component and a polyethylene terephthalate polymer having a core component of a melting point of 258 ° C.
50% by weight of a non-woven sheet A made of 3 denier core-sheath long fiber, 50% by weight of ethylene and terephthalic acid / isophthalic acid copolymer polyester having a melting point of 235 ° C, and a core component having a melting point of 258 ° C A nonwoven fabric sheet B composed of long fibers having a core-sheath structure having a thickness of 3 denier and a weight of 50% by weight of a polyethylene terephthalate polymer is continuously formed by a spun bond method and laminated, and then a pair of a flat roll and an engraving roll are formed. A non-woven sheet having a two-layer structure with a basis weight of 30 g / m ² by applying a heat-pressure treatment at a temperature of 200 ° C. with a sucrose fatty acid ester having a basis weight of 0.1 g based on the weight of the non-woven sheet. Weight%,
Thereafter, a viscose liquid is applied to the surface of the nonwoven fabric sheet B.
Cellophane was bonded to the viscose-coated surface while coating at 15 g / m ² . Thereafter, a coagulation regeneration bath at 52 ° C (composition:
Sulfuric acid 136 g / l, zinc sulfate 20 g / l, thorium sulfate 26
0 g / l, specific gravity 1.285), washed with 50 ° C warm water and dried.

When this was used for a ham casing and heat-sealed into a tube and filled with ham, the filling efficiency was 30 times lower than that of a conventional packaging material coated with viscose on paper.
% And the yield also improved by 5%. In addition, the problem of bag breakage at the distribution stage has been eliminated. In addition, the strength of the seal part was improved about four times.

Examples 8 and 9 Instead of the cellophane used in Example 7, a basis weight of 8 g / m 2 was used.
^When the ham was filled and packaged using the packing material using the paper making of Example ² (Example 8) and the packing material (Example 9) in which cellophane or paper making was not bonded to the surface coated with the viscose liquid, the filling efficiency and yield were obtained. Approximately the same results as in Example 7 were obtained for the strength of the seal, the strength of the seal portion, and the resistance to breakage of the bag during the distribution stage.

[0027]

As described above, according to the present invention, a packaging material is constituted based on a nonwoven fabric made of synthetic long fibers, and the packaging material can be sealed by heat sealing when it is formed into a tube. As a result, the strength of the seal portion can be greatly improved as compared with the conventional glue bonding. Moreover, by using components having different melting points as the components constituting the nonwoven fabric sheet, and having a difference in melting point of 30 ° C. or more, when the components having a lower melting point are melted and heat-sealed, the temperature at the time of the heat sealing may be slightly increased. Even if there is an error, a margin is provided, and the strength of the sheet can be maintained by preventing the components having a high melting point from melting. As a result, when the packaging material is used for filling ham or sausage in the form of a tube, the packaging material has a significantly improved packing efficiency, yield, and breakage resistance at the distribution stage compared to conventional packaging materials. Can be provided.

Claims (4)

(57) [Claims] 1. A sheet made of a nonwoven fabric made of synthetic filaments having 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, is treated with a surfactant such as sucrose fatty acid ester, Packaging material for ham and sausage casings with a course coat property. 2. A non-woven sheet comprising at least a two-layer structure made of synthetic fibers and comprising a single polymer, wherein the melting point of the polymer of one sheet composed of a single polymer is the polymer of the other sheet composed of a single polymer. A ham / sausage casing packaging material which is set at 30 ° C. or more higher than the melting point of the nonwoven fabric, and the viscose coatability is imparted by subjecting the nonwoven fabric sheet to a surfactant treatment such as sucrose fatty acid ester. 3. A sheet made of a nonwoven fabric made of synthetic filaments having 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 from the melting point of the sheath component polymer of the nonwoven fabric sheet. A nonwoven fabric sheet having at least a two-layer structure obtained by laminating a nonwoven fabric sheet made of a single polymer having a melting point higher than 30 ° C. and a surfactant such as a sucrose fatty acid ester is provided on the nonwoven fabric sheet. Process,
Packaging material for ham and sausage casings with viscose coat properties. 4. A sheet made of a nonwoven fabric made of synthetic long fibers having 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. A nonwoven sheet having at least a two-layer structure obtained by laminating a nonwoven sheet made of a synthetic long fiber having a core-sheath structure having a melting point higher than the melting point and a melting point of the sheath component polymer higher than the melting point of the sheath component polymer of the long fiber. A packaging material for ham and sausage casings comprising a sheet, and a viscose coat property is imparted to the nonwoven sheet by treating the sheet with a surfactant such as sucrose fatty acid ester.