Fragrance-absorbing paper, long-acting fragrance-holding scented sheet and preparation methods of fragrance-absorbing paper and long-acting fragrance-holding scented

Abstract

The invention discloses aroma-absorbing paper, a long-acting aroma-retaining scented sheet and preparation methods of the aroma-absorbing paper and the long-acting aroma-retaining scented sheet, and the preparation method of the aroma-absorbing paper comprises the following steps: treating plant fibers by adopting a pulping process to obtain paper pulp; sequentially bleaching, washing, concentrating and pulping the paper pulp; adding an auxiliary agent and a microporous material into the paper pulp, and uniformly mixing and stirring; the mixed paper pulp is made into paper through a paper machine, and wet paper is obtained; s5, dehydrating and drying the wet paper to obtain the aroma-absorbing paper. According to the method, the microporous material is added in the papermaking process, the content of essence and essential oil adsorbed by the paper sheet can be effectively increased, and the fragrance release time is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of aromatherapy products, and in particular to a fragrance absorbing paper and a long-lasting fragrance sheet and preparation methods thereof. Background Art

[0002] With economic development, people's quality of life is getting higher and higher, and various aromatherapy products have entered everyone's life. These products can not only bring a comfortable olfactory experience, but also often combine with interior decoration, personal taste and art of life. Although the traditional aromatherapy paper products on the market are widely used due to their low price and strong fragrance burst, they stand out among many aromatherapy products and are very popular products, but they still have significant technical defects and usage limitations. First, the fragrance lasts for a short time, and second, the fragrance content of the paper is low.

[0003] Existing aromatherapy paper usually absorbs essential oils through plant fibers. This adsorption mechanism relies on the capillary phenomenon between fibers. When it comes into contact with essential oils, the essential oils will move along the tiny gaps between fibers due to the capillary phenomenon. This is also a manifestation of a force between molecules. Through this movement, the essential oils are adsorbed into the paper. However, since the tiny plant fibers are not tightly bound together, that is, the structure between the plant fibers is relatively loose, the fluidity of the essential oils in the fiber gaps is high, and the interaction force is not large enough, resulting in the accelerated volatilization of the fragrance and the weak adsorption of the paper on the essential oils. This structure not only makes the paper absorb less essential oils, but also cannot retain the fragrance for a long time. Usually, it will lose the obvious fragrance in about 10 days, and the service life is short. Therefore, there is still a lack of an aromatherapy product that can provide long-lasting fragrance on the market.

[0004] For example, the previously disclosed patent CN117357683A discloses a scented card and a preparation method thereof. Although it can improve the scent absorption rate and scent retention time of the scented card, it is achieved by setting a water-based adhesive and an adsorbent material between at least two sheets of paper. Because this structure is a composite of multiple sheets of paper, coupled with the water-based adhesive and adsorbent material in the middle, the final scented card is relatively thick, which affects the appearance and is not practical. Summary of the invention

[0005] In order to overcome the existing technical defects, the present invention provides a fragrance absorbing paper and a long-lasting fragrance sheet and a preparation method of the two, which can effectively increase the content of essential oil absorbed by the paper and prolong the fragrance release time without changing the thickness or changing much.

[0006] In order to solve the above problems, the present invention proposes the following technical solutions:

[0007] In a first aspect, a method for preparing a fragrance absorbent paper is provided, comprising the following steps:

[0008] S1. Processing plant fibers by pulping process to obtain pulp;

[0009] S2, sequentially bleaching, washing, concentrating and beating the pulp;

[0010] S3, adding additives and microporous materials into the pulp and mixing and stirring evenly;

[0011] S4, papermaking the mixed pulp through a papermaking machine to obtain wet paper;

[0012] S5, dehydrating and drying the wet paper to obtain fragrance absorbing paper.

[0013] Furthermore, the amount of the plant fiber, the auxiliary agent and the microporous material is in the weight ratio of (15-25):(5-8):(5-10).

[0014] Furthermore, in step S1, 15 to 25 parts by weight of plant fibers are processed by chemical pulping, mechanical pulping or semi-chemical pulping to obtain paper pulp.

[0015] Furthermore, in step S3, 5 to 8 parts by weight of an auxiliary agent and 5 to 10 parts by weight of a microporous material are added to the pulp and mixed and stirred evenly.

[0016] Furthermore, the auxiliary agent is selected from one or more of polyacrylamide, adhesive, cellulose nanofiber and surfactant.

[0017] Furthermore, the microporous material is selected from one or more of calcium silicate, calcium chloride, magnesium silicate, magnesium stearate, fumed silica, diatomaceous earth and attapulgite.

[0018] Furthermore, after step S5, the following steps are also included:

[0019] S6. According to the designed size, the fragrance absorbing paper is cut, punched, printed, glazed and other processing is carried out in sequence to obtain a finished fragrance absorbing paper of standard size.

[0020] In a second aspect, the present invention further provides a fragrance absorbing paper, which is prepared by the preparation method described in any one of the first aspects.

[0021] In a third aspect, the present invention also provides a method for preparing a long-lasting fragrance tablet, comprising the following steps:

[0022] S10, mixing the essential oil and the antioxidant in a weight ratio of 2500 to 7000:1 and stirring to form a flavor mixture;

[0023] S11, soaking the fragrance absorbing paper in the essence mixture to impart fragrance; the fragrance absorbing paper is the fragrance absorbing paper as described in the second aspect.

[0024] S12, and then hang the fragrance absorbing paper adsorbed with the essence mixture to dry until no liquid drips, so as to obtain a long-lasting fragrance tablet.

[0025] Furthermore, in step S10, 0.01 to 0.02 parts by weight of an antioxidant is added to 50 to 70 parts by weight of essential oils and the mixture is mixed and stirred to form an essential oil mixture.

[0026] Furthermore, the essential oil is selected from one or more of patchouli essential oil, coumarin essential oil, vanillin essential oil and artificial musk.

[0027] Furthermore, the hanging drying time is controlled within 0.5-1 hour, and the long-lasting fragrance tablets are sealed and packaged after being air-dried.

[0028] In a fourth aspect, the present invention further provides a long-lasting fragrance tablet, which is prepared by the preparation method as described in any one of the third aspects.

[0029] Furthermore, in the long-lasting fragrance tablet, the ratio of essential oil, plant fiber, auxiliary agent, microporous material and antioxidant is (50-70) by weight: (15-25) : (5-8) : (5-10) : (0.01-0.02).

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. Since the amount of essential oil adsorbed by the microporous material can reach 3-5 times of its own weight, the present invention directly applies it to the papermaking process of the fragrance absorbing paper, so that the microporous material is evenly distributed on the fragrance absorbing paper, thereby greatly improving the fragrance absorption rate of the fragrance absorbing paper, which can reach 200% of its own weight, which is 1.5-2 times that of ordinary paper; and the thickness of the fragrance absorbing paper is controllable, and the fragrance absorption rate can be increased when the thickness remains unchanged or changes little.

[0032] 2. Since the microporous material has a large and deep porous structure, after the fragrance absorbent paper absorbs the essential oil to form a scented sheet, the essential oil can be adsorbed inside the micropores, thereby forming a multi-layer sustained-release mechanism. This structure and sustained-release mechanism not only increase the storage capacity of the essential oil, but also the essential oil content it carries is far greater than the essential oil content carried by a single plant fiber in an ordinary paper sheet. It can also effectively control its release rate to ensure that the release of the essential oil is stable and uniform, making up for the problems of aroma attenuation and insufficient explosive power of traditional paper sheets in the later stage. Therefore, by increasing the adsorption capacity and release stability of the essential oil, the fragrance retention time of the scented sheet is extended from 10 days to more than 20 days, and the service life is significantly improved, which greatly enhances the user experience.

[0033] 3. In the method of the present invention, microporous materials are added to paper pulp and then paper is made into paper using papermaking technology. By adjusting the content ratio of each component, the scented sheet finally produced has the characteristics of strong weather resistance. In an environment of -20°C to 50°C, the appearance and fragrance remain stable, and it is suitable for use in different regions and climatic conditions.

[0034] Additional aspects and advantages of the present invention will be given in part in the following description, which will become obvious from the following description, or may be learned through practice of the present invention. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments will be described clearly and completely below in conjunction with the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0037] It should also be understood that the terms used in this description of the embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the embodiments of the present invention. As used in the description of the embodiments of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms of "a", "an" and "the" are intended to include plural forms.

[0038] A long-lasting fragrance tablet provided by an embodiment of the present invention comprises the following raw material components: essential oils, plant fibers, additives, microporous materials and antioxidants; and the ratio of the essential oils, plant fibers, additives, microporous materials and antioxidants is (50-70) by weight: (15-25) by weight: (5-8) by weight: (5-10) by weight: (0.01-0.02).

[0039] Optionally, in the long-lasting fragrance tablet, by weight, the essential oil is 50-70 parts, the plant fiber is 15-25 parts, the auxiliary agent is 5-8 parts, the microporous material is 5-10 parts, and the antioxidant is 0.01-0.02 parts.

[0040] The preparation method of the above-mentioned long-lasting fragrance tablet comprises the following steps:

[0041] Step 1: Prepare the scent-absorbing paper, as follows:

[0042] S1. Processing plant fibers by pulping process to obtain pulp;

[0043] S2, sequentially bleaching, washing, concentrating and beating the pulp;

[0044] S3, adding additives and microporous materials into the pulp and mixing and stirring evenly;

[0045] S4, making paper from the mixed pulp through a papermaking machine, so that the fiber components are evenly spread on the mesh and gradually intertwined to form wet paper;

[0046] S5, dehydrating and drying the wet paper to obtain fragrance absorbing paper.

[0047] Optionally, the amount of the plant fiber, the auxiliary agent and the microporous material used is in a weight ratio of (15-25):(5-8):(5-10).

[0048] Optionally, in step S1, 15 to 25 parts by weight of plant fibers are processed by chemical pulping, mechanical pulping or semi-chemical pulping to obtain pulp.

[0049] Optionally, in step S3, 5 to 8 parts by weight of an auxiliary agent and 5 to 10 parts by weight of a microporous material are added to the pulp and mixed and stirred evenly.

[0050] Optionally, the auxiliary agent is selected from one or more of polyacrylamide, adhesive, cellulose nanofiber and surfactant; the auxiliary agent is used to enhance the adhesion between paper fibers, thereby improving the strength and performance of paper.

[0051] Optionally, the microporous material is selected from one or more of calcium silicate, calcium chloride, magnesium silicate, magnesium stearate, fumed silica, diatomaceous earth and attapulgite; the above microporous materials have the characteristics of porous structure, high porosity, large specific surface area, high oil absorption value, etc., which are conducive to the absorption of more essential oils. During the use of the absorbent paper to absorb essential oils, these absorbent materials can also slowly release the essential oils from their microporous channels, thereby prolonging the fragrance dissipation time of the scented sheet. The calcium silicate includes but is not limited to the following commercially available raw materials: hydrated calcium silicate sold by Jiangxi Dishi Mineral Fiber Technology Co., Ltd.

[0052] Optionally, in step S5, the wet paper is physically pressed in a multi-layer press to remove moisture, and then further moisture is removed from the paper by drying cylinders or air drying to ensure that the paper reaches a desired moisture content.

[0053] Optionally, the plant fibers may be used in a mixture of one or more different types, such as using bamboo fibers or wood fibers alone, or using a mixture of bamboo fibers and wood fibers at the same time.

[0054] Optionally, after step S5, the following steps are also included:

[0055] S6. According to the designed size, the fragrance absorbing paper is cut, punched, printed, glazed and other processing is carried out in sequence to obtain a finished fragrance absorbing paper of standard size.

[0056] Step 2: Mix and stir the essential oil and antioxidant in a weight ratio of 2500-7000:1 or (50-70): (0.01-0.02) to form an essential oil mixture to prevent the essential oil from oxidizing and deteriorating.

[0057] Optionally, 0.01 to 0.02 parts by weight of an antioxidant is added to 50 to 70 parts by weight of essential oils and the mixture is mixed and stirred to form an essential oil mixture.

[0058] Optionally, the fragrance ingredients in the essential oil include but are not limited to one or more of patchouli, coumarin, vanillin and artificial musk; of course, the essential oil can also be wood essential oil, flower essential oil and fruit essential oil, such as sandalwood essential oil, white pine essential oil, ebony essential oil, rose essential oil, lavender essential oil, lemon essential oil, sweet orange essential oil, etc.

[0059] Step 3: Soak the fragrance absorbing paper prepared in the first step in the fragrance mixture to impart fragrance.

[0060] Step 4: then hang the fragrance absorbing paper adsorbed with the essence mixture to dry until no liquid drips, so as to obtain long-lasting fragrance tablets; hanging and drying means hanging the fragrance absorbing paper and letting it dry naturally.

[0061] Optionally, the hanging drying time is controlled at 0.5-1 hour, and the long-lasting fragrance tablets are sealed and packaged after being air-dried.

[0062] Example 1

[0063] This embodiment provides a long-lasting fragrance tablet, comprising the following raw material components in parts by weight:

[0064] 70 parts of essential oils; 18 parts of plant fibers; 6 parts of adhesives; 6 parts of diatomaceous earth; and 0.02 parts by weight of antioxidants.

[0065] The preparation method is:

[0066] (1) pulping: treating 18 parts by weight of plant fibers by chemical pulping, mechanical pulping or semi-chemical pulping to obtain pulp;

[0067] (2) Pulp processing: bleaching, washing, concentrating and beating the pulp in sequence to ensure that the produced paper reaches the expected quality;

[0068] (3) Pulp preparation: Add 6 parts by weight of a binder and 6 parts by weight of diatomaceous earth to the pulp and mix and stir evenly;

[0069] (4) Papermaking: The mixed pulp is passed through a papermaking machine to make paper to obtain wet paper;

[0070] (5) Dehydration and drying: The wet paper is physically squeezed in a multi-layer press to remove moisture, and then further removed through drying cylinders or air drying to ensure that the paper reaches the required moisture content to produce paper;

[0071] (6) Surface treatment: cutting, punching, printing, glazing and other processing are performed on the paper according to the designed size to produce the aroma-absorbing paper;

[0072] (7) Essential oil compounding: adding 0.02 parts by weight of antioxidant to 70 parts by weight of essential oil and mixing and stirring to form an essential oil mixture;

[0073] (8) Fragrance application: soaking the above-prepared fragrance absorbent paper in a fragrance mixture to perform fragrance application, so that the fragrance absorbent paper fully absorbs the fragrance mixture;

[0074] (9) Hanging to drain: The scent-absorbing paper adsorbed with the essence mixture is then hung to drain until no liquid drips, thereby obtaining a long-lasting scented sheet.

[0075] Example 2

[0076] This embodiment provides a long-lasting fragrance tablet, comprising the following raw material components in parts by weight:

[0077] 63 parts of essential oils; 20 parts of plant fibers; 7 parts of surfactants; 10 parts of calcium silicate; and 0.02 parts by weight of antioxidants.

[0078] The preparation method is:

[0079] (1) pulping: treating 20 parts by weight of plant fibers by chemical pulping, mechanical pulping or semi-chemical pulping to obtain pulp;

[0080] (2) Pulp processing: bleaching, washing, concentrating and beating the pulp in sequence to ensure that the produced paper reaches the expected quality;

[0081] (3) Pulp preparation: 7 parts by weight of a surfactant and 10 parts by weight of calcium silicate were added to the pulp and mixed and stirred uniformly;

[0082] (4) Papermaking: The mixed pulp is passed through a papermaking machine to make paper to obtain wet paper;

[0083] (5) Dehydration and drying: The wet paper is physically squeezed in a multi-layer press to remove moisture, and then further removed through drying cylinders or air drying to ensure that the paper reaches the required moisture content to produce paper;

[0084] (6) Surface treatment: cutting, punching, printing, glazing and other processing are performed on the paper according to the designed size to produce the aroma-absorbing paper;

[0085] (7) Essential oil compounding: Add 0.02 parts by weight of antioxidant to 63 parts by weight of essential oil and mix and stir to form an essential oil mixture;

[0086] (8) Fragrance application: soaking the above-prepared fragrance absorbent paper in a fragrance mixture to perform fragrance application, so that the fragrance absorbent paper fully absorbs the fragrance mixture;

[0087] (9) Hanging to drain: The scent-absorbing paper adsorbed with the essence mixture is then hung to drain until no liquid drips, thereby obtaining a long-lasting scented sheet.

[0088] Example 3

[0089] This embodiment provides a long-lasting fragrance tablet, comprising the following raw material components in parts by weight:

[0090] 50 parts of essential oils; 16 parts of plant fibers; 5 parts of cellulose nanofibers; 8 parts of calcium chloride; and 0.01 parts by weight of an antioxidant.

[0091] The preparation method is:

[0092] (1) pulping: treating 16 parts by weight of plant fibers by chemical pulping, mechanical pulping or semi-chemical pulping to obtain pulp;

[0093] (2) Pulp processing: bleaching, washing, concentrating and beating the pulp in sequence to ensure that the produced paper reaches the expected quality;

[0094] (3) Pulp preparation: 5 parts by weight of cellulose nanofibers and 8 parts by weight of calcium chloride were added to the pulp and mixed and stirred evenly;

[0095] (4) Papermaking: The mixed pulp is passed through a papermaking machine to make paper to obtain wet paper;

[0096] (5) Dehydration and drying: The wet paper is physically squeezed in a multi-layer press to remove moisture, and then further removed through drying cylinders or air drying to ensure that the paper reaches the required moisture content to produce paper;

[0097] (6) Surface treatment: cutting, punching, printing, glazing and other processing are performed on the paper according to the designed size to produce the aroma-absorbing paper;

[0098] (7) Essential oil compounding: adding 0.01 parts by weight of antioxidant to 50 parts by weight of essential oil and mixing and stirring to form an essential oil mixture;

[0099] (8) Fragrance application: soaking the above-prepared fragrance absorbent paper in a fragrance mixture to perform fragrance application, so that the fragrance absorbent paper fully absorbs the fragrance mixture;

[0100] (9) Hanging to drain: The scent-absorbing paper adsorbed with the essence mixture is then hung to drain until no liquid drips, thereby obtaining a long-lasting scented sheet.

[0101] Comparative Example 1

[0102] This embodiment provides a long-lasting fragrance tablet, comprising the following raw material components in parts by weight:

[0103] 35 parts of essential oil; 16 parts of plant fiber; 5 parts of adhesive; 4 parts of calcium chloride; 0.01 parts by weight of antioxidant; its preparation method is the same as that of the above-mentioned embodiments 1-3.

[0104] Comparative Example 2

[0105] This embodiment provides a long-lasting fragrance tablet, comprising the following raw material components in parts by weight:

[0106] 42 parts of essential oil; 30 parts of plant fiber; 9 parts of surfactant; 5 parts of calcium silicate; 0.012 parts by weight of antioxidant; its preparation method is the same as that of the above-mentioned embodiments 1-3.

[0107] The long-lasting fragrance tablets prepared in Examples 1-3 and Comparative Examples 1-2 were placed in rooms without foreign fragrances, the rooms were kept normally ventilated, and the fragrance dissipation time of the fragrance cards was recorded. The recording results are shown in Table 1.

[0108] Table 1: Dissipation time of the fragrance of the long-lasting fragrance tablets of Examples 1-3 and Comparative Examples 1-2

[0109] Test groups Fragrance dissipation time (days) Example 1 38 Example 2 32 Example 3 25 Comparative Example 1 12 Comparative Example 2 16

[0110] It can be seen from the test results that the fragrance dissipation time of the long-lasting fragrance sheets of Examples 1-3 of the present invention is 25 days or more. In Comparative Examples 1 and 2, the ratio of each component was changed, resulting in a decrease in the fragrance absorption rate and fragrance retention time of the prepared fragrance absorbing paper, which ultimately affected its service life.

[0111] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A method for preparing a fragrance absorbent paper, characterized in that: The following steps are involved: S1. Processing plant fibers by pulping process to obtain pulp; S2, sequentially bleaching, washing, concentrating and beating the pulp; S3, adding additives and microporous materials into the pulp and mixing and stirring evenly; S4, papermaking the mixed pulp through a papermaking machine to obtain wet paper; S5, dehydrating and drying the wet paper to obtain fragrance absorbing paper.

2. The preparation method according to claim 1, characterized in that: The amounts of the plant fiber, the auxiliary agent and the microporous material are calculated in a weight ratio of (15-25):(5-8):(5-10).

3. The preparation method according to claim 1, characterized in that: In step S1, 15 to 25 parts by weight of plant fibers are processed by chemical pulping, mechanical pulping or semi-chemical pulping to obtain pulp.

4. The preparation method according to claim 3, characterized in that: In step S3, 5 to 8 parts by weight of an auxiliary agent and 5 to 10 parts by weight of a microporous material are added to the pulp and mixed and stirred evenly.

5. The preparation method according to any one of claims 1 to 4, characterized in that: The auxiliary agent is selected from one or more of polyacrylamide, adhesive, cellulose nanofiber and surfactant; the microporous material is selected from one or more of calcium silicate, calcium chloride, magnesium silicate, magnesium stearate, fumed silica, diatomaceous earth and attapulgite.

6. A fragrance absorbing paper, characterized in that: The preparation is obtained by the preparation method according to any one of claims 1 to 5.

7. A method for preparing a long-lasting fragrance tablet, characterized in that: The following steps are involved: S10, mixing the essential oil and the antioxidant in a weight ratio of 2500 to 7000:1 and stirring to form a flavor mixture; S11, soaking the fragrance absorbing paper in the fragrance mixture to impart fragrance; the fragrance absorbing paper is the fragrance absorbing paper as claimed in claim 6; S12, and then hang the fragrance absorbing paper adsorbed with the essence mixture to dry until no liquid drips, so as to obtain a long-lasting fragrance tablet.

8. The preparation method according to claim 7, characterized in that: In step S10, 0.01 to 0.02 parts by weight of an antioxidant is added to 50 to 70 parts by weight of an essential oil and the mixture is mixed and stirred to form an essential oil mixture.

9. A long-lasting fragrance tablet, characterized in that: The product is prepared by the preparation method as claimed in claim 7 or 8.

10. The long-lasting fragrance sheet according to claim 9, characterized in that: In the long-lasting fragrance tablet, the ratio of essential oil, plant fiber, auxiliary agent, microporous material and antioxidant is (50-70): (15-25): (5-8): (5-10): (0.01-0.02) by weight.