CN219731474U - Heat-sealing tea filter paper and teabag - Google Patents
Heat-sealing tea filter paper and teabag Download PDFInfo
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- CN219731474U CN219731474U CN202321084302.2U CN202321084302U CN219731474U CN 219731474 U CN219731474 U CN 219731474U CN 202321084302 U CN202321084302 U CN 202321084302U CN 219731474 U CN219731474 U CN 219731474U
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Abstract
The utility model belongs to the technical field of special paper new materials, and particularly relates to heat-sealing tea filter paper and teabags. The heat-sealing tea filter paper comprises base paper and a heat-bonding coating layer, wherein one side or two sides of the base paper are coated and dried with food-grade thermoplastic polyolefin or polylactic acid emulsion, the base paper part of the base paper which is not infiltrated by the food-grade thermoplastic polyolefin or polylactic acid emulsion forms a base layer, the base paper part which is infiltrated by the base paper forms an emulsion-containing permeable layer, the surface of the base paper is also provided with a surface layer, and the surface layer and the emulsion-containing permeable layer jointly form the heat-bonding coating layer. The heat-seal tea filter paper has the advantages of good comprehensive performance, simple base paper manufacturing method, convenient coating of the heat-seal coating layer, strong production adaptability, easy control of various indexes of the paper, convenient production management, more stable various indexes of the paper and lower production cost.
Description
Technical Field
The utility model belongs to the technical field of special paper new materials, and particularly relates to heat-sealing tea filter paper and teabags.
Background
Tea leaves are native in china, and the 9 th century of the male element is transmitted into japan, and the 19 th century is transmitted into southeast asia, south asia, europe and other worldwide places. In eastern countries such as China and Japan, tea leaves are generally placed into a teacup or a teapot to be directly soaked or decocted by hot water, and the leaching liquid is used for drinking. However, in Europe and south Asia, tea leaves are generally dried and ground into tea dust, and the tea dust is packaged in small bags, and the small bags of tea are placed into a teacup or a teapot to be soaked or decocted with hot water and then drunk. European tea powder is also favored to be added with various flavors and fragrances to prepare teabags with various tastes. The production of the teabag mainly involves three production elements: tea raw material, packaging material and teabag package forming machine.
The packaging material can be selected from mesh cloth and tea filter paper made of chemical fibers such as polyester, and the tea filter paper is generally selected as the packaging material of the teabag because the chemical fibers such as polyester are difficult to degrade, and the tea filter paper is divided into heat-seal type tea filter paper and non-heat-seal type tea filter paper according to the sealing mode of the teabag and the different manufacturing materials. The heat-seal tea bag forming machine is simple in machine, low in cost and easy to popularize, and especially, the heat-seal tea filter paper is generally selected for making the tea bag in our domestic market. The heat-seal tea filter paper contains a certain amount of heat-seal fibers, and the sealing of the tea bag can be realized by bonding two layers of paper containing the heat-seal fibers in a high-temperature roller hot-pressing mode, so that the sealing is sealed. The heat-seal tea filter paper is added with part of heat-melting fibers such as PP fibers, PE fibers, ES fibers, PLA fibers and the like, and has relatively high ration, and is generally more than or equal to 16.5g/m 2 . At present, the heat-seal tea filter paper produced at home and abroad is manufactured by two layers, the two layers are completely different in structure, one layer is a base layer (or called no heat-seal layer), and the other layer is a heat-seal layer, so that the single-bag type tea bag is manufactured. The production process of the heat-seal type tea filter paper comprises the following steps: the basic layer adopts softwood pulp, hardwood pulp and various hemp pulp as raw materials, and in the mass ratio of the paper, the mass ratio of the paper is generally controlled as follows: 60-80%; the heat-bonding layer is made of a larger part of heat-sealing fibers, and is additionally added with part of softwood pulp, hardwood pulp and various hemp pulp as raw materials, wherein the mass ratio of the heat-bonding layer in the whole paper is as follows: 20-40%; the mass ratio of the heat seal fiber in the heat seal layer is as follows: 50-90%, and the rest is selected from wood pulp, various hemp pulp or the combination of the wood pulp and the hemp pulp, and the other steps of two-layer molding, squeezing, drying, coiling, slitting, packaging and the like are performed. The heat-seal tea leaf filter paper produced by the combination has better paper strength, better heat-seal strength, better air permeability and better bulk, and simultaneously hasHas better anti-end leakage performance.
In addition, a very special heat-sealing tea filter paper is used for manufacturing double-bag type tea bags, a small amount of heat-sealing fibers are added in a base layer of paper sheets, the heat-sealing paper is used on a very special tea bag machine, and the tea bag machine is produced by only one company worldwide, is complex to manufacture, has very high selling price and is rarely used in the market. The heat-sealing tea filter paper with the two layers of heat-sealing fibers cannot be used on the existing tea packaging machine for manufacturing single bags in the market, otherwise, the heat-sealing fibers contained on the base layer are bonded with the sealing pressing wheel through hot pressing at the sealing pressing wheel of the tea packaging machine, and normal production cannot be achieved.
Chinese patent (publication No. CN111172802A, publication No. 2020-05-19) discloses a lightweight green heat-sealing tea filter paper and a preparation method thereof: the filter paper comprises an outer thermal adhesive layer and an inner thermal adhesive layer, and is prepared by mixing wood pulp fiber and heat-seal fiber, wherein the heat-seal fiber adopts modified polylactic acid fiber, the melting point is 125-145 ℃, and the additives added in the slurry are all green natural polymer additives, so that the filter paper has the characteristics of complete natural circulation and biological decomposition. The patent describes that the filter paper comprises an outer heat-bonding layer and an inner heat-bonding layer, and obviously, the heat-sealing tea filter paper is only suitable for manufacturing heat-sealing double-bag tea bags, and has small application amount in the market.
The Chinese patent (publication No. CN104233906A, publication No. 2014-12-24) discloses a preparation process of heat-seal tea filter paper: the filter paper of the utility model adopts a two-layer structure, takes a wood pulp layer as an inner layer and a chemical fiber layer as an outer layer, and is formed by adopting two raw materials to respectively paper and then adopting heat setting for compounding. The patent uses two layers of base paper (one layer is a chemical fiber layer and the other layer is a wood pulp layer) to carry out composite shaping by adopting a compression roller to form composite paper, and only part of heat-seal fibers at the joint of the two layers of the composite paper are melted to generate viscosity to be bonded with the wood pulp of the other layer, so that the bonding force formed by fiber winding between the two layers formed by wet papermaking and the hydrogen bonding force between plant fibers are avoided. The composite paper formed by adopting the dry-method compression roller for hot pressing has poor binding force at the composite position of the two layers, and the prepared tea bag is soaked in boiling water, so that the peeling and layering between the chemical fiber layer and the wood pulp layer are very easy to form a bag breaking phenomenon. Such heat-sealed filter papers for making tea bags are not approved by the market.
The Chinese patent (publication No. CN101798773A, publication No. 2010-08-11) discloses a double-sided heat-seal filter paper for manufacturing double bags and a preparation method thereof, wherein the double-sided heat-seal filter paper consists of a main heat-seal layer and a secondary heat-seal layer, the paper of the main heat-seal cover contains polypropylene fibers, the addition of the polypropylene fibers is 20-50% of the total amount of the paper fibers of the main heat-seal surface, the paper of the secondary heat-seal cover contains polyethylene fibers or composite fibers containing the polyethylene fibers, and the addition of the polyethylene fibers or the polyethylene fibers is 10-40% of the total amount of the paper fibers of the secondary heat-seal surface; the preparation method of the double-sided heat-seal filter paper adopts an inclined wire paper machine for forming, wherein the upper layer adopts wood pulp mixed polypropylene fibers, the lower layer adopts wood pulp mixed polyethylene fibers or polyethylene-containing composite fibers, the upper layer and the lower layer are used for composite papermaking, and a drying tunnel type drying mode is adopted for shaping. The two layers of the product manufactured by the patent are heat-bonding layers, so that the product is obviously only suitable for manufacturing heat-sealing double-bag tea bags, and the market dosage is small.
The Chinese patent (publication No. CN111155355A, publication No. 2020-05-15) discloses a heat-sealing tea filter paper, which is characterized in that the filter paper is manufactured by upper and lower layers, the upper layer is made of full wood pulp fiber, the lower layer is a mixture of corn fiber and wood pulp fiber, the upper layer accounts for 30-80% of the filter paper, and the corn fiber of the lower layer accounts for 20-80% of the mixture of the lower layer according to weight percentage.
The production modes of the heat-sealing type tea leaf filter paper in the patent of the utility model all use two layers of paper making, and then the heat-sealing type tea leaf filter paper with a two-layer structure is formed by different combination modes.
Disclosure of Invention
In order to solve the technical problems, the utility model aims to provide novel heat-sealing tea filter paper, which is prepared by coating food-grade thermoplastic polyolefin or polylactic acid emulsion on one side or both sides of base paper, and has the advantages of good comprehensive performance, simple base paper manufacturing method, convenient coating of a heat-bonding coating layer, strong production adaptability, easy control of various indexes of paper, convenient production management, more stable various indexes of paper and lower production cost.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the heat-sealing tea filter paper comprises base paper and a heat-bonding coating layer, wherein one side or two sides of the base paper are coated and dried with food-grade thermoplastic polyolefin or polylactic acid emulsion, the base paper part of the base paper which is not infiltrated by the food-grade thermoplastic polyolefin or polylactic acid emulsion forms a base layer, the base paper part which is infiltrated by the base paper forms an emulsion-containing permeable layer, the surface of the base paper is also provided with a surface layer, and the surface layer and the emulsion-containing permeable layer jointly form the heat-bonding coating layer.
Preferably, the basis weight is 9.0-25 g/m 2 The tightness is low and is less than or equal to 0.40g/m 3 The thickness is controlled to be 20-80 mu m, and the air permeability is 4000-50000CU.
Preferably, the mass percentage of the thermal bonding coating layer on the whole piece of filter paper is 20-60%.
Preferably, the mass percentage of the thermal bonding coating layer on the whole piece of filter paper is 25-45%.
Preferably, the thermoplastic polyolefin is one of polypropylene PP, polyethylene PE, nylon PA and EVA.
Preferably, the thermoplastic polyolefin is polypropylene PP or polyethylene PE.
Preferably, the base paper is coated on both sides with food-grade thermoplastic polyolefin or polylactic acid emulsion, the surface layer on one side of the base layer and the emulsion-containing permeation layer together form a main heat-sealing layer, and the surface layer on the other side of the base layer and the emulsion-containing permeation layer together form a secondary heat-sealing layer.
Preferably, the mass ratio of the main heat seal layer to the whole paper is as follows: 20-50% of the secondary heat sealing layer in the whole paper, wherein the mass ratio of the secondary heat sealing layer to the whole paper is as follows: 4-10%.
Preferably, the mass ratio of the main heat seal layer to the whole paper is as follows: 25-40% of the secondary heat sealing layer in the whole paper, wherein the mass ratio of the secondary heat sealing layer to the whole paper is as follows: 5-8%.
Further, the utility model also discloses a teabag, which comprises a packaging bag and tea dust; the tea dust is arranged in the packaging bag; the packaging bag is made of tea filter paper, and the tea filter paper adopts the heat-seal tea filter paper.
In summary, the utility model has the beneficial effects that: the heat-seal tea filter paper has good comprehensive performance and has the following advantages:
1. the paper making method of the base paper is simple, only single-layer paper making is needed, the equipment investment is low, and the investment cost is low;
2. the production mode of coating the heat sealing material on the base paper has simple production equipment and low investment cost;
3. the base paper with the same performance can be used for producing the single-bag heat-seal tea filter paper and the double-bag heat-seal tea filter paper, and the base paper is only correspondingly changed when the heat-seal material is coated, so that the production adaptability is strong.
4. The surface layer of the heat-bonding layer of the novel heat-sealing type tea filter paper (comprising the heat-bonding layer for manufacturing the single-bag heat-sealing tea filter paper and the main heat-sealing layer and the secondary heat-sealing layer for manufacturing the double-bag heat-sealing tea filter paper) is a layer of thermoplastic material containing 100% of polyolefin hydrocarbon or polylactic acid, so that the manufactured heat-sealing type tea bag has particularly good heat-sealing performance. The heat-sealing surface layer is made of a part of base paper, and the part of base paper below the heat-sealing surface layer also contains a part of thermoplastic material containing polyolefin or polylactic acid, so that the internal binding force of the heat-sealing filter paper is particularly good, and the prepared tea bag is not easy to break under the condition of long-time high-temperature decoction.
5. The novel heat-seal tea filter paper is simple to manufacture, various indexes of the paper are easy to control, production management is convenient, various indexes of the paper are more stable, and production cost is lower.
Drawings
Figure 1 is a heat seal tea filter paper required for making a single pouch heat seal tea bag.
Figure 2 is a heat seal tea filter paper required for making a double pouch heat seal tea bag.
Wherein: 1. the base layer, 2, the emulsion permeates the emulsion permeation layer formed by the base paper, 3, the surface layer formed after the emulsion is dried, 4, the thermal bonding layer formed by the emulsion permeation layer and the surface layer; 41. primary heat-seal layer, 42. Secondary heat-seal layer.
Detailed Description
The following examples are provided to further illustrate the practice of the utility model, but are not intended to limit the scope of the utility model.
The utility model discloses novel heat-sealing tea filter paper, which comprises the following steps: crushing the sizing agent, fluffing and pulping, adding an auxiliary agent, preparing sizing agent, removing slag, forming on a net (making paper), squeezing, drying in the front process, coating heat sealing materials, shaping in the back process at high temperature, coiling, inspecting, cutting, packaging and the like. The base paper is formed by a layer of net part of a paper machine, and the paper machine is a cylinder or inclined net paper machine. A certain amount of thermoplastic polyolefin or polylactic acid hydrocarbon emulsion is coated on the surface of the base paper by any one or two of single-sided film transfer coating, single-sided spraying or single-sided intaglio printing methods on one or two sides of the base paper.
Example 1
The heat-seal tea filter paper shown in fig. 1 comprises base paper and a heat-bonding coating layer, wherein a food-grade thermoplastic polyolefin or polylactic acid emulsion is coated and dried on one side of the base paper, the base paper part of the food-grade thermoplastic polyolefin or polylactic acid emulsion which does not permeate into the base paper forms a base layer 1, the base paper part which permeates into the base paper forms an emulsion-containing permeation layer 2, a surface layer 3 is further formed on the surface of the base paper, and the surface layer 3 and the emulsion-containing permeation layer 2 together form the heat-bonding coating layer 4.
The heat-seal tea filter paper of the embodiment is the heat-seal tea filter paper required for manufacturing a single-bag heat-seal tea bag and comprises base paper and a heat-seal coating layer, wherein the base paper is formed by pulping, fluffing, pulping, streaming and forming a layer of net part of a paper machine by using 100% vegetable fiber slurry, and then is pressed, dried and dried to prepare the single-layer base paper with specific performance, and the base paper has the required quantitative lower than 9.0-25 g/m 2 The tightness is low and is less than or equal to0.40g/m 3 The thickness is controlled to be 30-80 mu m, the air permeability is good, and the air permeability is controlled to be 4000-40000CU. The mass ratio of the hot-bonding coating layer on the whole piece of paper is as follows: 20-50%; the key indexes of the novel heat-sealing tea filter paper for manufacturing the single bag are as follows: quantification: 16.5-30.0g/m 2 Of these, the most conventional quantification is 16.5g/m 2 The indexes of the heat-seal tea filter paper are as follows: quantification: 16.5.+ -. 0.8g/m 2 Air permeability: gtoreq 15000 CU, tensile strength (longitudinal): 0.55kN/m or more, tensile strength (transverse direction): 0.20kN/m or more, wet strength (machine direction): not less than 0.15kN/m, heat sealing strength: not less than 0.090kN/m, water filtering time: the base layer has no heat sealing strength, and the filter paper with the structure is smoothly used on a single-bag heat sealing tea filter paper forming machine.
Example 2
The heat-seal tea filter paper shown in fig. 2 comprises base paper and a heat-bonding coating layer, wherein food-grade thermoplastic polyolefin or polylactic acid emulsion is coated and dried on two sides of the base paper, the base paper part of the food-grade thermoplastic polyolefin or polylactic acid emulsion which does not permeate into the base paper forms a base layer 1, the base paper part which permeates into the base paper forms an emulsion-containing permeation layer 2, a surface layer 3 is further formed on the surface of the base paper, the surface layer 3 on one side of the base layer 1 and the emulsion-containing permeation layer 2 form a main heat-seal layer 41 together, and the surface layer 3 on the other side of the base layer 1 and the emulsion-containing permeation layer 2 form a secondary heat-seal layer 42 together.
The heat-seal tea filter paper of the embodiment is a novel heat-seal tea filter paper for manufacturing double bags, and comprises base paper and a heat-seal coating layer, wherein the base paper is formed by pulping, fluffing, beating, streaming and forming a layer of net part of a paper machine by using 100% vegetable fiber slurry, and then is pressed, dried and dried to prepare the single-layer base paper with specific performance, and the base paper has the required quantitative low amount of only 9.0-25 g/m 2 The tightness is low and is less than or equal to 0.40g/m 3 The thickness is controlled to be 30-80 mu m, the air permeability is good, and the air permeability is controlled to be 4000-40000CU. The heat-bonding coating layer is composed of a main heat-sealing layer and a secondary heat-sealing layer which are respectively arranged on two sides of the base paper, and the mass ratio of the main heat-sealing layer to the whole paper is as follows: 20-50% of the secondary heat sealing layer in the whole paper, wherein the mass ratio of the secondary heat sealing layer to the whole paper is as follows: 4-10%; preferably, the primary heat-seal layer is of the mass of the whole sheetThe ratio is as follows: 25-40% of the secondary heat sealing layer in the whole paper, wherein the mass ratio of the secondary heat sealing layer to the whole paper is as follows: 5-8%. Of which the most conventional quantification is 16.5g/m 2 The indexes of the heat-seal tea filter paper are as follows: quantification: 16.0.+ -. 0.8g/m 2 Air permeability: gtoreq 15000 CU, tensile strength (longitudinal): 0.55kN/m or more, tensile strength (transverse direction): more than or equal to 0.20kN/m 2 Wet strength (machine direction): not less than 0.15kN/m, and the heat sealing strength of the main heat sealing surface: not less than 0.090kN/m, water filtering time: less than or equal to 2s, and the heat sealing strength of the secondary heat sealing surface: the filter paper with the structure is smoothly used on a double-bag heat-seal tea filter paper forming machine from 0.020 to 0.050 kN/m.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art. The generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The heat-seal tea filter paper comprises base paper and a heat-bonding coating layer, and is characterized in that food-grade thermoplastic polyolefin or polylactic acid emulsion is coated and dried on one side or two sides of the base paper, a base paper part of the base paper which is not infiltrated by the food-grade thermoplastic polyolefin or polylactic acid emulsion forms a base layer (1), a base paper part which is infiltrated by the base paper forms an emulsion-containing permeable layer (2), a surface layer (3) is further formed on the surface of the base paper, and the surface layer (3) and the emulsion-containing permeable layer (2) jointly form the heat-bonding coating layer (4).
2. A heat-seal tea leaf filter paper according to claim 1 wherein the basis weight is 9.0-25 g/m 2 The tightness is low and is less than or equal to 0.40g/m 3 The thickness is controlled to be 20-80 mu m, and the air permeability is 4000-50000CU.
3. A heat-seal tea leaf filter paper according to claim 1, wherein the heat-seal coating layer is 20-60% by mass of the whole filter paper.
4. A heat-seal tea leaf filter paper according to claim 1, wherein the heat-seal coating layer is 25-45% by mass of the whole filter paper.
5. A heat seal tea leaf filter paper according to claim 1 wherein the thermoplastic polyolefin is one of polypropylene PP, polyethylene PE, nylon PA and EVA.
6. A heat seal tea leaf filter paper according to claim 1 wherein the thermoplastic polyolefin is polypropylene PP or polyethylene PE.
7. The heat-seal tea leaf filter paper according to claim 1, wherein the base paper is coated on both sides with a food-grade thermoplastic polyolefin or polylactic acid emulsion, the surface layer (3) on one side of the base layer (1) and the emulsion-containing permeation layer (2) together form a primary heat-seal layer (41), and the surface layer (3) on the other side of the base layer (1) and the emulsion-containing permeation layer (2) together form a secondary heat-seal layer (42).
8. A heat-seal tea leaf filter paper according to claim 7, wherein the mass ratio of the main heat-seal layer (41) on the whole paper is: 20-50% of a secondary heat seal layer (42) in the whole paper, wherein the mass ratio is as follows: 4-10%.
9. A heat-seal tea leaf filter paper according to claim 7, wherein the mass ratio of the main heat-seal layer (41) on the whole paper is: 25-40% of the secondary heat-sealing layer (42) comprises the following components in mass ratio on the whole paper: 5-8%.
10. A teabag is characterized by comprising a packaging bag and tea dust; the tea dust is arranged in the packaging bag; the packaging bag is made of tea leaf filter paper, wherein the tea leaf filter paper is a heat-sealing tea leaf filter paper according to any one of claims 1-9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321084302.2U CN219731474U (en) | 2023-05-08 | 2023-05-08 | Heat-sealing tea filter paper and teabag |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321084302.2U CN219731474U (en) | 2023-05-08 | 2023-05-08 | Heat-sealing tea filter paper and teabag |
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| CN219731474U true CN219731474U (en) | 2023-09-22 |
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| CN202321084302.2U Active CN219731474U (en) | 2023-05-08 | 2023-05-08 | Heat-sealing tea filter paper and teabag |
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- 2023-05-08 CN CN202321084302.2U patent/CN219731474U/en active Active
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