CN112111994B

CN112111994B - Tea leaf residue paper holder and preparation method thereof

Info

Publication number: CN112111994B
Application number: CN202010845725.6A
Authority: CN
Inventors: 俞健
Original assignee: Cafa Technology Shanghai Co ltd
Current assignee: Cafa Technology Shanghai Co ltd
Priority date: 2020-08-20
Filing date: 2020-08-20
Publication date: 2022-09-06
Anticipated expiration: 2040-08-20
Also published as: CN112111994A

Abstract

The application belongs to the technical field of packaging, and particularly relates to a tea leaf residue paper holder and a preparation method thereof. The preparation raw materials comprise: raw wood pulp, tea leaves, cellulose, bean pulp and water. By adjusting the mass ratio of the tea leaves, the cellulose and the soybean meal, the method can improve the bursting strength of the tea leaves paper holder, further prolong the service life of the tea leaves paper holder and reduce the production cost; the green tea leaves are selected, so that the acting force among the tea leaves, cellulose and bean pulp can be enhanced, and the wood pulp taste on the surface of the paper holder is improved; and the tea leaves with the particle size of 100-200 meshes are selected, so that the enhancement effect of the tea leaves on the performance of the paper holder is improved on the premise of ensuring good dispersibility.

Description

Tea leaf residue paper holder and preparation method thereof

Technical Field

The application belongs to the technical field of packaging, and particularly relates to a tea leaf residue paper holder and a preparation method thereof.

Background

Paper holder (Molded pulp tray), also known as a paper pulp mold, is an environment-friendly paper product with different types and purposes formed by using newsprint, white pure wood pulp and the like as raw materials, pulping and blending the raw materials into pulp with a certain proportion of concentration, designing according to product requirements, forming by vacuum adsorption, and drying. Has better effects of shock resistance, static resistance, corrosion resistance and the like. The paper holder is widely applied to four fields of industrial paper holders, agricultural paper holders, food paper holders and medical products.

At the present stage, along with the development of society, the demand of household appliances and machines is increased, and the demand of fruits and bowls on paper supports is increased, so that the mass production of the paper supports causes the mass felling of trees, resource waste and environmental pollution.

The paper support made of white wood pulp or waste paper boxes is poor in solvent resistance, for example, when some cold drinks are placed, the shockproof effect of the paper support is greatly influenced due to the wetting of water; and the wood pulp taste of the paper support can generate bad use experience when the paper support is used in the field of food.

Disclosure of Invention

In order to solve the technical problem, the application provides a tea leaf residue paper holder, which comprises the following preparation raw materials: raw wood pulp, tea leaf residue, cellulose, bean pulp and water.

As a preferred technical scheme, the preparation raw materials comprise the following components in parts by weight: 20-100 parts of raw wood pulp, 10-50 parts of tea leaves, 10-50 parts of bean pulp, 1-10 parts of cellulose and 2500 parts of water.

In a preferred embodiment, the cellulose is at least one selected from the group consisting of hydroxyethylcellulose, ethylhydroxyethylcellulose, carboxymethylcellulose, carboxymethylethylcellulose, methylhydroxyethylcellulose, hydroxyethylcellulose, hydroxyethylmethylcellulose, methylcellulose, sulfoethylated hydroxyethylcellulose, hydroxypropylcellulose, and hydroxypropylmethylcellulose.

As a preferred technical scheme, the mass ratio of the tea leaves, the cellulose and the soybean meal is 1: (0.1-1): (0.5-2).

Preferably, the tea leaves are selected from at least one of black tea leaves, green tea leaves and oolong tea leaves.

As a preferable technical scheme, the mass ratio of the tea leaves, the cellulose and the soybean meal is 1: (0.1-0.5): (1-2).

As a preferable technical scheme, the mass ratio of the tea leaves, the cellulose and the soybean meal is 1: 0.1: 1.5

As a preferable technical scheme, the particle size range of the tea leaves is 100-400 meshes.

As a preferable technical scheme, the average particle size of the tea leaves is 150 meshes.

As a preferable technical scheme, the preparation method of the tea leaf residue paper holder comprises the following steps:

(1) tea leaf residue pretreatment: grinding and sieving tea leaves, putting the ground tea leaves into water with the temperature of 30-50 ℃ for cleaning to obtain tea leaves residues, and then putting the tea leaves into an oven for drying for later use;

(2) adding raw wood pulp, tea leaf residues, cellulose and soybean meal into a pulping barrel, adding water into the barrel for pulping, wherein the pulping degree is 35-40 DEG SR, and the pulping time is 60-80 minutes to obtain a paper pulp stock solution;

(3) diluting the obtained paper pulp stock solution with water to obtain paper pulp solution with the concentration of 4-5%;

(4) and (3) injecting the pulp liquid into a molding pulp tank, molding the product by using a molding machine, heating and preserving heat by using a hot pressing and molding machine for molding, wherein the temperature of the hot pressing and molding machine is 220-240 ℃, and thus the tea leaf residue paper holder is obtained.

Has the advantages that:

(1) by adjusting the mass ratio of the tea leaves, the cellulose and the soybean meal, the method can improve the bursting strength of the tea leaves paper holder, further prolong the service life of the tea leaves paper holder and reduce the production cost;

(2) according to the application, the green tea leaves are selected, so that the acting force among the tea leaves, cellulose and bean pulp can be enhanced, and the wood pulp taste on the surface of the paper holder is improved;

(3) according to the application, the tea leaves with the particle size of 100-200 meshes are selected, so that the effect of enhancing the performance of the paper holder by the tea leaves is improved on the premise of ensuring good dispersibility.

Detailed Description

For purposes of the following detailed description, it is to be understood that the invention may assume various alternative variations and step sequences, except where expressly specified to the contrary. Moreover, other than in any operating examples, or where otherwise indicated, all numbers expressing, for example, quantities of ingredients used in the specification and claims are to be understood as being modified in all instances by the term "about". Accordingly, unless indicated to the contrary, the numerical parameters set forth in the following specification and attached claims are approximations that may vary depending upon the desired properties to be obtained by the present invention. At the very least, and not as an attempt to limit the application of the doctrine of equivalents to the scope of the claims, each numerical parameter should at least be construed in light of the number of reported significant digits and by applying ordinary rounding techniques.

Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the invention are approximations, the numerical values set forth in the specific examples are reported as precisely as possible. Any numerical value, however, inherently contains certain errors necessarily resulting from the standard deviation found in their respective testing measurements.

When a range of values is disclosed herein, the range is considered to be continuous and includes both the minimum and maximum values of the range, as well as each value between such minimum and maximum values. Further, when a range refers to an integer, each integer between the minimum and maximum values of the range is included. Further, when multiple range-describing features or characteristics are provided, the ranges may be combined. In other words, unless otherwise indicated, all ranges disclosed herein are to be understood to encompass any and all subranges subsumed therein. For example, a stated range from "1 to 10" should be considered to include any and all subranges between the minimum value of 1 and the maximum value of 10. Exemplary subranges of the range 1 to 10 include, but are not limited to, 1 to 6.1, 3.5 to 7.8, 5.5 to 10, and the like.

In order to solve the problems, the invention provides a tea leaf residue paper holder which is prepared from the following raw materials: raw wood pulp, tea leaves, cellulose, bean pulp and water.

Preferably, the preparation raw materials comprise the following components in parts by weight: 20-100 parts of raw wood pulp, 10-50 parts of tea leaves, 10-50 parts of bean pulp, 1-10 parts of cellulose and 2500 parts of water.

Preferably, the cellulose is selected from at least one of hydroxyethyl cellulose, ethyl hydroxyethyl cellulose, carboxymethyl ethyl cellulose, methyl hydroxyethyl cellulose, hydroxyethyl methyl cellulose, sulfoethylated hydroxyethyl cellulose, hydroxypropyl cellulose, and hydroxypropyl methyl cellulose.

Further preferably, the cellulose is selected from hydroxypropyl methylcellulose.

Hydroxypropyl methylcellulose has a methoxyl content of 28-30%, a hydroxypropyl content of 7.0-12%, a viscosity of 50mPa · s, model H811095, available from Maxin reagent nets.

Preferably, the mass ratio of the tea leaves, the cellulose and the bean pulp is 1: (0.1-1): (0.5-2).

The applicant found that the addition of hydroxypropylmethylcellulose can increase the dispersibility of the pulp raw material in water, and the addition of hydroxypropylmethylcellulose can increase the strength of the paper holder, and that, in the process of preparing the paper holder, tea leaves were added as a main additive to hydroxypropylmethylcellulose, and the ratio of tea leaves, hydroxypropylmethylcellulose and soybean meal was maintained at 1: (0.1-1): when the content of the tea leaves is within the range of (0.5-2), one part of the tea leaves can be dispersed in a hydroxypropyl methyl cellulose molecular chain, the rigidity of the hydroxypropyl methyl cellulose molecular chain is enhanced, the mechanical property of the paper holder is enhanced by cooperating with the hydroxypropyl methyl cellulose, the other part of the tea leaves can form a strong surface hydrogen bond effect with hydroxypropyl methyl molecules under the cooperation with various amino groups in the bean pulp, the swelling property of the paper holder is enhanced, and the hydration action force between the cooperation of the tea leaves and the solvent is enhanced by the enhancement effect of the tea leaves on the hydroxypropyl methyl cellulose, so that the bursting strength of the paper holder is improved.

Further preferably, the mass ratio of the tea leaves, the cellulose and the bean pulp is 1: (0.1-0.5): (1-2).

More preferably, the mass ratio of the tea leaves, the cellulose and the bean pulp is 1: 0.1: 1.5.

Further preferably, the tea leaves are selected from green tea leaves.

Green tea is one of the main teas in china. The green tea is prepared by fermenting, retains natural substances of fresh leaves, and contains more nutrients such as tea polyphenols, catechin, caffeine, amino acids, vitamins, etc. The natural nutrient components in the green tea have special effects of anti-aging, cancer prevention, cancer resistance, sterilization, inflammation elimination and the like, and are beyond the reach of other tea. The green tea is prepared from tea shoots as raw materials by typical processes of de-enzyming, rolling, drying and the like. The color and luster of the dry tea and the tea soup and the tea bottom after being brewed are mainly green, the picked fresh leaves are firstly subjected to high-temperature de-enzyming to kill various oxidases and keep the green tea leaves, and then the tea is prepared by rolling and drying.

Preferably, the particle size range of the tea leaves is 100-400 meshes.

More preferably, the average particle size of the tea leaves is 150 meshes.

The particle size of the tea leaf residue is selected from 100-400 meshes, and particularly the average particle size is 150 meshes. The applicant finds that the small-particle-size tea leaves rapidly reduce the fluidity of the whole system and enhance the bursting strength of the paper holder at the initial stage of addition along with the addition of the tea leaves, but the higher the surface energy of the tea leaves particles is along with the gradual reduction of the particle size, so that the wetting property is reduced, the dispersion performance is reduced, and the performance of the tea leaves paper holder is affected.

The particle size of the tea leaves is selected to be 100-400 meshes, the type of the tea leaves is selected to be green tea, the two conditions are determined, the small particle size and the large specific surface area of the tea leaves can be ensured, the green tea containing more tea polyphenol is selected, the tea leaves of the tea leaves residue paper holder can be endowed with faint scent due to the existence of the tea polyphenol in the green tea, the original taste of wood pulp is improved, and the paper holder can be endowed with a certain odor adsorption function due to the addition of the tea leaves with the small particle size and the large specific surface area, and the taste of the wood pulp paper holder is improved.

A second aspect of the present application provides a method for preparing a tea leaf residue paper holder, comprising the following steps: (1) tea leaf residue pretreatment: grinding and sieving tea leaves, putting the ground tea leaves into water with the temperature of 30-50 ℃ for cleaning to obtain tea leaves residues, and then putting the tea leaves into an oven for drying for later use; (2) adding raw wood pulp, tea leaf residues, cellulose and soybean meal into a pulping barrel, adding water into the barrel for pulping, wherein the pulping degree is 35-40 DEG SR, and the pulping time is 60-80 minutes to obtain a paper pulp stock solution; (3) diluting the obtained paper pulp stock solution with water to obtain paper pulp solution with the concentration of 4-5%; (4) and (3) injecting the pulp liquid into a molding pulp tank, molding the product by using a molding machine, heating and preserving heat by using a hot pressing and molding machine for molding, wherein the temperature of the hot pressing and molding machine is 220-240 ℃, and thus the tea leaf residue paper holder is obtained.

The bean pulp used in the experiment of the application is not specially limited, is purchased from \37075, Hao Nuo Si Da feed factory of city county, but is not limited to the company.

The raw wood pulp used in the experiment of the application is not specially limited, and is purchased from a pulp mill in south of the Yangtze river, but is not limited to the company.

The present invention will be specifically described below by way of examples. It should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and that the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above disclosure are still within the scope of the present invention.

In addition, the starting materials used are all commercially available, unless otherwise specified.

Examples

Example 1

The tea leaf residue paper holder comprises the following preparation raw materials in parts by weight: 40 parts of raw wood pulp, 20 parts of tea leaves, 30 parts of bean pulp, 2 parts of cellulose and 1900 parts of water.

Raw wood pulp purchased from pulp factories in the south of the Yangtze river; the cellulose is selected from hydroxypropyl methylcellulose, with methoxyl content of 28-30%, hydroxypropyl content of 7.0-12%, viscosity of 50 mPa.s, model H811095, and is available from Meclin reagent net; bean pulp, cat 005, was purchased from \37075, Hao Nuo Sida feed factory, city county.

The tea leaf residue is green tea leaf residue, and the green tea is selected from West lake Longjing.

The average particle size of the tea leaves is 150 meshes.

The preparation method of the tea leaf residue paper holder comprises the following steps: (1) tea leaf residue pretreatment: grinding and sieving green tea, putting the ground tea into water with the temperature of 50 ℃ for cleaning to obtain tea leaves, and then putting the tea leaves into an oven for drying for later use; (2) adding raw wood pulp, tea leaf residues, hydroxypropyl methyl cellulose and soybean meal into a pulping barrel, adding water into the barrel for pulping, wherein the pulping degree is 35 DEG SR, and the pulping time is 70 minutes to obtain a paper pulp stock solution; (3) diluting the obtained paper pulp stock solution with water to obtain paper pulp solution with the mass concentration of 5%; (4) and (3) injecting the paper pulp liquid into a forming pulp tank, carrying out plastic forming on the product through a plastic forming machine, heating and preserving heat through a hot pressing forming machine for forming, wherein the temperature of the hot pressing forming machine is 240 ℃, and thus the tea leaf residue paper holder is obtained.

Example 2

Raw wood pulp purchased from a pulp mill in the south of the Yangtze river; the cellulose is selected from hydroxypropyl methylcellulose, with methoxyl content of 28-30%, hydroxypropyl content of 7.0-12%, viscosity of 50 mPa.s, model H811095, and is available from Meclin reagent net; bean pulp, cat 005, was purchased from \37075;, Hao Nuo Sida feed factory, city county.

The tea residue is green tea residue, and the green tea is selected from West lake Longjing tea.

The average grain diameter of the tea leaves is 400 meshes.

The tea leaf residue paper holder was prepared according to example 1.

Example 3

The average particle size of the tea leaves is 100 meshes.

The tea leaf residue paper holder was prepared according to example 1.

Example 4

The tea leaf residue paper holder comprises the following preparation raw materials in parts by weight: 40 parts of raw wood pulp, 20 parts of tea leaves, 40 parts of bean pulp, 2 parts of cellulose and 2040 parts of water.

The average particle size of the tea leaves is 150 meshes.

Tea leaf residue paper holder preparation method refer to example 1.

Comparative example 1

The tea leaves are black tea leaves, and the black tea is selected from assam black tea.

The average particle size of the tea leaves is 150 meshes.

Referring to example 1, the tea leaf residue paper holder was prepared by replacing the green tea in step (1) with black tea, which is different from example 1.

Comparative example 2

The tea residue is oolong tea residue, and the oolong tea is Wuyi rock tea.

The average particle size of the tea leaves is 150 meshes.

Method for manufacturing tea leaf residue paper holder referring to example 1, the green tea in step (1) was changed to oolong tea, which is different from example 1.

Comparative example 3

The tea leaf residue paper holder comprises the following preparation raw materials in parts by weight: 40 parts of raw wood pulp, 20 parts of tea leaves, 50 parts of bean pulp, 2 parts of cellulose and 2240 parts of water.

Raw wood pulp purchased from pulp factories in the south of the Yangtze river; the cellulose is selected from hydroxypropyl methylcellulose, with methoxyl content of 28-30%, hydroxypropyl content of 7.0-12%, viscosity of 50 mPa.s, model H811095, and is available from Meclin reagent net; bean pulp, cat 005, was purchased from \37075;, Hao Nuo Sida feed factory, city county.

The average particle size of the tea leaves is 150 meshes.

The tea leaf residue paper holder was prepared according to example 1.

Comparative example 4

The tea leaf residue paper holder comprises the following preparation raw materials in parts by weight: 40 parts of raw wood pulp, 20 parts of tea leaf residues, 30 parts of soybean meal, 20 parts of cellulose and 2200 parts of water.

The average particle size of the tea leaves is 150 meshes.

The tea leaf residue paper holder was prepared according to example 1.

Comparative example 5

Raw wood pulp purchased from a pulp mill in the south of the Yangtze river; the cellulose is selected from carboxymethyl cellulose, has a substitution degree of 0.7, a weight average molecular weight of 90000 and a model number of C104983, and is available from Shanghai Biochemical technology Co., Ltd of Aladdin; bean pulp, cat 005, was purchased from \37075;, Hao Nuo Sida feed factory, city county.

The average particle size of the tea leaves is 150 meshes.

The tea leaf residue paper holder was prepared according to example 1.

And (3) performance testing:

1. paper bursting strength test: the tea leaf residue paper trays prepared in examples 1 to 4 and comparative examples 1 to 5 were subjected to paper bursting measurements using an NPD-2A paper bursting tester, and the test results were counted in the following table:

2. and (3) testing the folding endurance: the tea leaf residue paper bases prepared in examples 1 to 4 and comparative examples 1 to 5 were subjected to folding endurance test with reference to GB/T457-1989 "paper folding endurance test", which stipulates that the number of folding endurance tests is excellent at more than 3, good at more than 1 and poor at 1, and the results are counted in the following table:

through the experimental data, the paper prepared by the method has better bursting strength, so that the service life of the tea leaf residue paper support can be prolonged.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may modify or change the technical content of the above disclosure into equivalent embodiments with equivalent changes, but all those simple modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the present invention.

Claims

1. The tea leaf residue paper holder is characterized by comprising the following preparation raw materials in parts by weight: 20-100 parts of raw wood pulp, 10-50 parts of tea leaves, 10-50 parts of bean pulp, 1-10 parts of cellulose and 1500-2500 parts of water, wherein the cellulose is hydroxypropyl methyl cellulose, the tea leaves are green tea leaves, and the mass ratio of the tea leaves to the cellulose to the bean pulp is 1: (0.1-1): (0.5-2).

2. The tea leaf residue paper holder according to claim 1, wherein the mass ratio of the tea leaf residue, the cellulose and the soybean meal is 1: (0.1-0.5): (1-2).

3. The tea leaf residue paper holder according to claim 1, wherein the mass ratio of the tea leaf residue, the cellulose and the bean pulp is 1: 0.1: 1.5.

4. the tea grounds paper holder as claimed in claim 1, wherein the particle size range of the tea grounds is 100-400 meshes.

5. The tea leaf residue paper holder as claimed in claim 4, wherein the average particle size of the tea leaf residue is 150 mesh.

6. A method of making a tea leaf skim tray according to any one of claims 1 to 5, comprising the steps of:

(2) adding raw wood pulp, tea leaf residue, cellulose and soybean meal into a pulping barrel, adding water into the barrel for pulping, wherein the pulping degree is 35-40 DEG SR, and the pulping time is 60-80 minutes to obtain a paper pulp stock solution;