Preparation method of anti-down-feather velvet inner liner

Abstract

The present invention relates to a method for preparing a velvet liner that is resistant to down drilling, comprising preparing a modified water-based polyurethane resin; uniformly spraying the modified water-based polyurethane resin on the non-velvet surface of a single-sided velvet cloth and one side of an inner lining cloth, and forming a porous film layer after drying; laying the inner lining cloth flat on the single-sided velvet cloth, contacting the two porous film layers with each other, and bonding them by hot pressing with a hot pressing roller, wherein a plurality of air-permeable air cavities arranged in sequence at equal intervals are formed between the two porous film layers, and the velvet liner that is resistant to down drilling is obtained after cooling. The present invention enables the velvet liner that is resistant to down drilling to maintain good anti-down drilling effect, air permeability, and waterproofness even after long-term use by drying the modified water-based polyurethane resin. The use of polyurethane-modified silicone resin and inert gas makes the pores in the formed porous film layer more evenly dispersed and the structure more stable, and changes the direction of gas flow through the air-permeable air cavities, thereby further improving the air permeability.

Description

Technical Field

[0001] The invention belongs to the technical field of velvet fabrics, and particularly relates to a method for preparing a velvet liner that is anti-down drilling. Background Art

[0002] Velvet liner (velvet cloth) is a silk fabric with velvet warp forming velvet loops or piles on the surface of the fabric. If you want it to have an anti-velvet drilling effect, it is generally adopted to evenly spray resin on the non-velvet surface of the single-sided velvet cloth. After the resin dries, a smooth anti-velvet drilling membrane layer is formed. However, the smooth anti-velvet drilling membrane layer has good sealing properties. Therefore, the disadvantage of this method is that it will greatly reduce the air permeability of the velvet cloth, and ultimately make it difficult for the velvet cloth to have good anti-velvet drilling effect and air permeability at the same time. Summary of the Invention

[0003] The purpose of the present invention is to provide a method for preparing a velvet liner that is anti-down drilling in order to solve the above problems.

[0004] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0005] The method for preparing a velvet liner that prevents down from penetrating comprises the following steps:

[0006] S1, preparing modified waterborne polyurethane resin;

[0007] S2. Evenly spraying the modified waterborne polyurethane resin on the non-velvet surface and one side of the lining fabric of the single-sided velvet cloth to form a porous film layer after drying;

[0008] S3. Lay the lining cloth flat on the single-sided velvet cloth, and place the two porous membrane layers in contact with each other. Bond them by hot pressing with a hot pressing roller, wherein a plurality of breathable air cavities arranged in sequence with equal intervals are formed between the two porous membrane layers. After cooling, an anti-downhole velvet liner is obtained.

[0009] As a further optimization scheme of the present invention, the modified waterborne polyurethane resin is composed of the following components in parts by weight: 50-80 parts of waterborne polyurethane emulsion, 10-20 parts of polyurethane-modified silicone resin, 3-9 parts of water-based zinc stearate, 1-3 parts of polyether-modified silicone oil, 0.3-1.5 parts of polyoxyethylene ether emulsifier, 0.3-2 parts of triallyl isocyanurate, 0.6-7.5 parts of polyurethane associative thickener, 5-12 parts of toluene, 6-14 parts of turpentine, and 30-45 parts of deionized water.

[0010] As a further optimized solution of the present invention, the polyoxyethylene ether emulsifier is one of fatty alcohol polyoxyethylene ether and alkylphenol polyoxyethylene ether.

[0011] As a further optimization scheme of the present invention, the preparation steps of the modified waterborne polyurethane resin are specifically as follows:

[0012] S11, heating and melting the polyurethane-modified silicone resin to a liquid state, then sequentially transferring the aqueous polyurethane emulsion, deionized water, toluene, and turpentine into a reactor, stirring, and heating to carry out a polymerization reaction;

[0013] S12. During the polymerization reaction, continuously dropwise adding aqueous zinc stearate, polyether-modified silicone oil, polyoxyethylene ether emulsifier, triallyl isocyanurate, and polyurethane associative thickener to obtain a mixed resin solution after the polymerization reaction;

[0014] S13, the mixed resin solution is foamed in a foaming machine to obtain a modified waterborne polyurethane resin, and the modified waterborne polyurethane resin is transported to a storage barrel for insulation for standby use.

[0015] As a further optimization solution of the present invention, in step S13, the volume ratio of the gas introduced into the foaming machine to the mixed resin solution is (2.6-4.2):1.

[0016] As a further optimized solution of the present invention, the gas is air and inert gas.

[0017] As a further optimized solution of the present invention, the volume ratio of air to inert gas is 1:(0.4-1.2).

[0018] The beneficial effects of the present invention are:

[0019] 1) The present invention uses a porous membrane layer formed after drying of a modified waterborne polyurethane resin to ensure that the anti-down drilling velvet liner can maintain good anti-down drilling effect, air permeability, and waterproofness even after long-term use. The air permeable cavity formed between the two porous membrane layers changes the direction of gas flow, thereby further improving the air permeability of the anti-down drilling velvet liner.

[0020] 2) The present invention uses a polyurethane-modified silicone resin and an inert gas in combination to make the pores in the formed porous membrane layer more evenly dispersed and the structure more stable, so that the prepared anti-down drilling velvet liner is not easy to be drilled with down, and also has a certain waterproof effect and can increase the air permeability. Even if used for a long time, it can still maintain good anti-down drilling effect, waterproofness, and air permeability, thereby increasing the service life of the anti-down drilling velvet liner. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a side cross-sectional view of the anti-drilling velvet liner of the present invention;

[0022] Figure 2 It is a side cross-sectional view of the anti-drilling velvet liner and the hot pressing roller of the present invention;

[0023] In the figure: 1. Single-sided velvet cloth; 2. Porous membrane layer; 3. Lining cloth; 4. Breathable air cavity; 5. Connecting shaft; 6. Press column; 7. Hot pressing plate. DETAILED DESCRIPTION

[0024] The present application is described in further detail below in conjunction with the accompanying drawings. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0025] 1. Description

[0026] If the specific techniques and conditions are not specified in the examples, the experiments were carried out according to the techniques and conditions described in the literature in the field. If the manufacturers of the reagents or instruments are not specified, they are all conventional products that can be purchased commercially.

[0027] 2. Methods

[0028] Example 1

[0029] The method for preparing a velvet liner that prevents down from penetrating comprises the following steps:

[0030] S1, preparing modified waterborne polyurethane resin;

[0031] S2. Evenly spraying the modified waterborne polyurethane resin on the non-velvet surface of the single-sided velvet cloth 1 and one side of the lining cloth 3 to form a porous film layer 2 after drying, wherein the spraying amount of the modified waterborne polyurethane resin on the single-sided velvet cloth 1 and the lining cloth 3 is 125 g / m2;

[0032] S3. Lay the lining cloth 3 flat on the single-sided velvet cloth 1, and place the two porous membrane layers 2 in contact with each other. Bond them by hot pressing with a hot pressing roller, wherein a plurality of breathable air cavities 4 arranged in sequence at equal intervals are formed between the two porous membrane layers 2. After cooling, an anti-downhole velvet liner is obtained.

[0033] It should be noted that the side cross-sectional view of the anti-drilling velvet liner prepared in the present invention is as follows Figure 1 As shown, the side cross-sectional view of the hot pressing roller used is as shown in FIG. Figure 2 As shown, the hot pressing roller includes a connecting shaft 5, a plurality of pressure columns 6 arranged on the connecting shaft 5, and a hot pressing plate 7 arranged on the end surface of the pressure columns 6 away from the connecting shaft 5. The pressure columns 6 are radially distributed on the outer surface of the connecting shaft 5.

[0034] The preparation steps of the modified waterborne polyurethane resin are specifically as follows:

[0035] S11, heat 10 parts of polyurethane-modified silicone resin to melt until liquid, the heating temperature is 48°C (±2°C), then add 80 parts of aqueous polyurethane emulsion, 43.8 parts of deionized water, 5 parts of toluene, and 6 parts of turpentine to a reactor in sequence, stir, and heat to 90°C (±5°C) to carry out polymerization reaction;

[0036] S12. During the polymerization reaction, 3 parts of aqueous zinc stearate, 1 part of polyether-modified silicone oil, 0.3 parts of alkylphenol polyoxyethylene ether, 0.3 parts of triallyl isocyanurate, and 0.6 parts of polyurethane associative thickener were continuously added dropwise to obtain a mixed resin solution after polymerization reaction;

[0037] S13. The mixed resin solution is foamed in a foaming machine to obtain a modified waterborne polyurethane resin, and is transported to a storage barrel for insulation for standby use. The insulation temperature is 25°C (±2°C), wherein the volume ratio of the gas introduced into the foaming machine to the mixed resin solution is 2.6:1, the gas is air and inert gas, and the volume ratio of air to inert gas is 1:0.4.

[0038] Example 2

[0039] The preparation steps of the modified waterborne polyurethane resin are adjusted to:

[0040] S11, heat 15 parts of polyurethane-modified silicone resin to melt until liquid, the heating temperature is 48°C (±2°C), then add 65 parts of aqueous polyurethane emulsion, 36.5 parts of deionized water, 8 parts of toluene, and 10 parts of turpentine to a reactor in sequence, stir, and heat to 90°C (±5°C) to carry out polymerization reaction;

[0041] S12. During the polymerization reaction, 6 parts of aqueous zinc stearate, 2 parts of polyether-modified silicone oil, 1.1 parts of fatty alcohol polyoxyethylene ether, 1.4 parts of triallyl isocyanurate, and 5 parts of polyurethane associative thickener were continuously added dropwise to obtain a mixed resin solution after polymerization reaction;

[0042] S13. The mixed resin solution is foamed in a foaming machine to obtain a modified waterborne polyurethane resin, and is transported to a storage barrel for insulation for standby use. The insulation temperature is 25°C (±2°C), wherein the volume ratio of the gas introduced into the foaming machine to the mixed resin solution is 3.4:1, the gas is air and inert gas, and the volume ratio of air to inert gas is 1:0.9.

[0043] The rest remains the same as in Example 1.

[0044] Example 3

[0045] The preparation steps of the modified waterborne polyurethane resin are adjusted to:

[0046] S11, heat 20 parts of polyurethane-modified silicone resin to melt until liquid, the heating temperature is 48°C (±2°C), then sequentially transfer 50 parts of aqueous polyurethane emulsion, 31 parts of deionized water, 12 parts of toluene, and 14 parts of turpentine into a reactor, stir, and heat to 90°C (±5°C) to carry out polymerization reaction;

[0047] S12. During the polymerization reaction, 9 parts of aqueous zinc stearate, 3 parts of polyether-modified silicone oil, 1.5 parts of fatty alcohol polyoxyethylene ether, 2 parts of triallyl isocyanurate, and 7.5 parts of polyurethane associative thickener were continuously added dropwise to obtain a mixed resin solution after polymerization reaction;

[0048] S13. The mixed resin solution is foamed in a foaming machine to obtain a modified waterborne polyurethane resin, and is transported to a storage barrel for insulation for standby use. The insulation temperature is 25°C (±2°C), wherein the volume ratio of the gas introduced into the foaming machine to the mixed resin solution is 4.2:1, the gas is air and inert gas, and the volume ratio of air to inert gas is 1:1.2.

[0049] The rest remains the same as in Example 1.

[0050] In order to verify the effect of the present invention, the anti-down drilling velvet liners prepared in Examples 1-3 were tested. Each group of examples provided 50 test samples. The test items were air permeability test, anti-down drilling effect test, and waterproof test. The specific test method is as follows:

[0051] The air permeability test is carried out in accordance with the determination method of GB / T5453-1997.

[0052] The anti-down drilling effect test is carried out in accordance with the determination method of GB / T12705-1991.

[0053] The waterproof test is carried out in accordance with the determination method of GB / T4744-2013.

[0054] The test was divided into two rounds. The test samples in the first round were washed in a washing machine for 12 hours before testing and then dried in the sun before testing. The speed of the washing machine was 800 rpm. The test samples in the second round were washed in a washing machine for 72 hours before testing and then dried in the sun before testing. The speed of the washing machine was 1400 rpm. The specific test results are shown in Table 1:

[0055] Table 1

[0056]

[0057] Experimental conclusion: According to the data in Table 1, the anti-down drilling velvet liner prepared according to the scheme of Example 2 has good anti-down drilling effect and waterproofness, while maintaining good air permeability. Moreover, the anti-down drilling velvet liner can still maintain good anti-down drilling effect, waterproofness and air permeability after multiple washings, and has a long service life. Therefore, Example 2 is the optimal solution.

[0058] 3. Experimental Verification

[0059] The comparative examples verified by the experiment are divided into three groups, respectively labeled as comparative example 1, comparative example 2, and comparative example 3, wherein:

[0060] Comparative Example 1 is used to verify the effect of no air cavity 4 between the two porous membrane layers 2 on the air permeability, anti-down drilling effect and waterproofness of the velvet liner;

[0061] Comparative Example 2 is used to verify the effects of polyurethane-modified silicone resin in modified waterborne polyurethane resin on the air permeability, anti-down drilling effect, and waterproofness of velvet lining;

[0062] Comparative Example 3 is used to verify the effects of inert gas filling during the foaming process of the modified waterborne polyurethane resin on the air permeability, anti-down drilling effect, and waterproofness of the velvet liner.

[0063] The difference between the velvet liner in the experiment conducted in Comparative Example 1 and the anti-drilling velvet liner in Example 2 is that: in step S3, the lining cloth 3 is laid flat on the single-sided velvet cloth 1, and the two porous membrane layers 2 are in contact with each other and are tightly bonded by hot pressing with a hot pressing roller with a continuous and flat surface, wherein the two porous membrane layers 2 are tightly attached and tightly bonded without leaving any gaps.

[0064] The remaining steps and raw material ratios are consistent with those in Example 2.

[0065] The difference between the velvet liner in the experiment conducted in Comparative Example 2 and the anti-drilling velvet liner in Example 2 is that in the preparation of the modified water-based polyurethane resin, the polyurethane-modified silicone resin is replaced by an equal amount of epoxy resin.

[0066] The remaining steps and raw material ratios are consistent with those in Example 2.

[0067] The difference between the velvet liner in the experiment conducted in Comparative Example 3 and the anti-drilling velvet liner in Example 2 is that in the preparation of the modified water-based polyurethane resin, an equal volume of oxygen is used to replace the inert gas during the foaming process of the foaming machine.

[0068] The remaining steps and raw material ratios are consistent with those in Example 2.

[0069] The test was carried out according to the above test method, and the test results are shown in Table 2:

[0070] Table 2

[0071]

[0072] Experimental conclusion: According to the experimental data of Comparative Example 1 in Table 2 and Example 2 in Table 1, it can be known that the breathable air cavity 4 between the two porous membrane layers 2 can be used to improve the air permeability of the anti-drilling velvet liner. When the gas passes through the lining cloth 3 and the porous membrane layer 2 on the lining cloth 3 in turn, most of the gas will continue to be transported along the direction of the breathable air cavity 4 to flow out. Even when the anti-drilling velvet liner is sewn into clothes, most of the gas will be transported along the breathable air cavity 4 to the needle seam and flow out. In addition, a small part of the gas passes through the porous membrane layer 2 and the single-sided velvet cloth 1 of the single-sided velvet cloth 1 in turn and flows out. The air permeability is improved by changing the gas flow direction, and this method will not reduce the anti-drilling effect and waterproof effect of the anti-drilling velvet liner. Therefore, the provision of the breathable air cavity 4 can improve the air permeability while maintaining the anti-drilling effect and waterproof effect of the anti-drilling velvet liner.

[0073] According to the experimental data of Comparative Example 2 and Comparative Example 3 in Table 2 and Example 2 in Table 1, it can be known that the use of polyurethane-modified silicone resin can improve the air permeability of the finally formed porous membrane layer 2, thereby improving the air permeability of the anti-down drilling velvet liner. Among them, through the mutual use of polyurethane-modified silicone resin and inert gas, the pore dispersion in the formed porous membrane layer 2 is more uniform and the structure is more stable, so that the prepared anti-down drilling velvet liner is not easy to be drilled with down, and also has a certain waterproof effect and can increase the air permeability. Even if it is used for a long time, it can still maintain good anti-down drilling effect, waterproofness and air permeability, thereby increasing the service life of the anti-down drilling velvet liner.

[0074] The above-described embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. A method for preparing a velvet liner that is resistant to down penetration, characterized in that: The following steps are involved: S1. Preparation of modified waterborne polyurethane resin: The modified waterborne polyurethane resin is composed of the following components in parts by weight: 50-80 parts of waterborne polyurethane emulsion, 10-20 parts of polyurethane modified silicone resin, 3-9 parts of waterborne zinc stearate, 1-3 parts of polyether modified silicone oil, 0.3-1.5 parts of polyoxyethylene ether emulsifier, 0.3-2 parts of triallyl isocyanurate, 0.6-7.5 parts of polyurethane associative thickener, 5-12 parts of toluene, 6-14 parts of turpentine, and 30-45 parts of deionized water; The preparation steps of the modified waterborne polyurethane resin are specifically as follows: S11, heating and melting the polyurethane-modified silicone resin to a liquid state, then sequentially transferring the aqueous polyurethane emulsion, deionized water, toluene, and turpentine into a reactor, stirring, and heating to carry out a polymerization reaction; S12. During the polymerization reaction, continuously dropwise adding aqueous zinc stearate, polyether-modified silicone oil, polyoxyethylene ether emulsifier, triallyl isocyanurate, and polyurethane associative thickener to obtain a mixed resin solution after the polymerization reaction; S13, the mixed resin solution is foamed in a foaming machine to obtain a modified waterborne polyurethane resin, and the modified waterborne polyurethane resin is transported to a storage barrel for insulation for standby use; In step S13, the volume ratio of the gas introduced into the foaming machine to the mixed resin solution is (2.6-4.2):1, and the gas is air and an inert gas; S2. Evenly spraying the modified waterborne polyurethane resin on the non-velvet surface and one side of the lining fabric of the single-sided velvet cloth to form a porous film layer after drying; S3. Lay the lining cloth flat on the single-sided velvet cloth, and place the two porous membrane layers in contact with each other. Bond them by hot pressing with a hot pressing roller, wherein a plurality of breathable air cavities arranged in sequence with equal intervals are formed between the two porous membrane layers. After cooling, an anti-downhole velvet liner is obtained.

2. The method for preparing the anti-down drilling velvet liner according to claim 1, characterized in that: The spraying amount of the modified waterborne polyurethane resin on the single-sided velvet cloth and the lining cloth is 110-140 g / m.

3. The method for preparing the anti-down drilling velvet liner according to claim 1, characterized in that: The polyoxyethylene ether emulsifier is one of fatty alcohol polyoxyethylene ether and alkylphenol polyoxyethylene ether.

4. The method for preparing the anti-down drilling velvet liner according to claim 1, characterized in that: The volume ratio of the air to the inert gas is 1:(0.4-1.2).

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