Bio-based environment-friendly flame retardant wallpaper and preparation method thereof

Abstract

A bio-based environment-friendly flame retardant wallpaper and a preparation method thereof, including: selecting alginate fibre to be mixed with wood pulp, beating to obtain mixed size, adding dispersant and performing paper-making and drying to obtain raw paper; sequentially coating the surface of the raw paper with alginate colloid, PVC, calcium carbonate and DOP paste; performing drying, cooling, printing, and cutting into the required specification to obtain the wallpaper. The chopped alginate fibre is used as paper pulp fiber, and the catalytic cracking effect is realized by metal ions in the fibre to reduce the production of flammable gases, form an alkaline environment, produce CO.sub.2, dilute the flammable gases, form a solid-state barrier of metal oxides and carbonates on the surface of the fiber and achieve the flame retardant effects of little smoke, no melt drops and the like. The flame retardant oxygen index of the wallpaper is more than 30%.

Claims

1. A preparation method of environment-friendly flame retardant wallpaper, sequentially comprising the following sequential steps: a. preparing raw paper: selecting alginate fibre to be mixed with full wood pulp, beating to obtain mixed size, adding a dispersant into the mixed size and performing paper-making and drying to obtain the raw paper; b. coating: sequentially uniformly coating the surface of the raw paper obtained in the step a with alginate colloid, PVC, calcium carbonate and DOP paste; c. drying and cooling: drying and cooling a coating coated on the surface of the raw paper in the step b; and d. printing: printing a required pattern on the surface of the raw paper coating after cooling, then softening the pattern, pressing the surface of the raw paper coating with an embossing wheel to obtain corresponding lines, and cutting into the required specification to obtain the wallpaper.

2. The preparation method of the environment-friendly flame retardant wallpaper according to claim 1, wherein, in the step a, the alginate fibre accounts for 20-80% of the mass of bone dry pulp in the mixed size; and the dispersant is an anion dispersant or a water-soluble polymer dispersant.

3. The preparation method of the environment-friendly flame retardant wallpaper according to claim 1, wherein in the step b, the alginate colloid is sodium alginate, and the coating thickness is 0.2-0.5 mm.

4. The preparation method of the environment-friendly flame retardant wallpaper according to claim 1, wherein in the step c, a hot air circulating system is selected to dry the coating on the surface of the raw paper, the drying temperature is 110-250 C., the drying time is 10-18 s, and the cooling time is 10-30 s.

5. The preparation method of the environment-friendly flame retardant wallpaper according to claim 1, wherein in the step d, the embossing depth of the embossing wheel is 0.2-1.2 mm.

6. The preparation method of the environment-friendly flame retardant wallpaper according to claim 2, wherein the alginate fibre is seaweed chopped fiber with the average length of 3-6 mm.

7. The preparation method of the environment-friendly flame retardant wallpaper according to claim 6, wherein the preparation method of the seaweed chopped fiber comprises: filtering, defoaming and spinning a sodium alginate solution with the mass fraction of 2-12% under the condition that the temperature is 15-100 C. to obtain the alginate fibre, and chopping the obtained alginate fibre for preparation.

8. Environment-friendly flame retardant wallpaper prepared by the preparation method according to claim 1.

9. Environment-friendly flame retardant wallpaper prepared by the preparation method according to claim 2.

10. Environment-friendly flame retardant wallpaper prepared by the preparation method according to claim 3.

11. Environment-friendly flame retardant wallpaper prepared by the preparation method according to claim 4.

12. Environment-friendly flame retardant wallpaper prepared by the preparation method according to claim 5.

13. Environment-friendly flame retardant wallpaper prepared by the preparation method according to claim 6.

14. Environment-friendly flame retardant wallpaper prepared by the preparation method according to claim 7.

Description

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The invention provides bio-based environment-friendly flame retardant wallpaper and a preparation method thereof In order to enable the advantages and the technical solutions of the invention to be clearer and more definite, the invention will be further clearly and fully illustrated below in conjunction with the specific embodiments.

[0024] The raw materials selected by the invention are commercially available.

Embodiment 1

[0025] According to the invention, a preparation method of bio-based environment-friendly flame retardant wallpaper specifically comprises the following steps:

[0026] (1) preparing raw paper: preparing seaweed chopped fiber with the length of 3 mm and 6 mm (with the mass ratio of 1:1) by wet spinning, mixing with 6 wt % of wood pulp with the beating degree of 30 SR and beating, wherein the mass of the seaweed chopped fiber accounts for 20% of the mass of bone dry paper pulp; and performing paper-making and drying after adding a dispersant, namely sodium cellulose sulfate with the concentration of 0.04 wt % after dilution and 0.3 wt % of a sodium alginate polymer solution dispersant to prepare the raw paper of the wallpaper;

[0027] (2) coating: firstly coating the 2 wt % of the sodium alginate solution by a coating machine, performing gelation treatment by 5 wt % of a calcium chloride solution, and then uniformly coating PVA, calcium carbonate and DOP paste on the surface of the raw paper, wherein the coating thickness is 0.25 mm;

[0028] (3) drying: drying a coating on the surface of the raw paper through a hot air circulating system, wherein the ambient temperature for drying is 150 C. and the drying time is 15 s;

[0029] (4) cooling: cooling and hardening the surface material by circulating cooling water through two cooling rings, wherein the cooling process is performed at normal temperature, and the cooling time is 10 s;

[0030] (5) printing: using different printing patterns to print the required patterns on the surface of the wallpaper by using corresponding printing wheels;

[0031] (6) softening: heating the wallpaper by utilizing a heating cover to soften the wallpaper to facilitate embossing;

[0032] (7) embossing: pressing the surface of the wallpaper by using an embossing wheel to produce corresponding line effects, wherein the embossing depth is 0.6 mm; and

[0033] (8) cutting and packaging: cutting the wallpaper into the required specification and curling the product into a finished product by a curling machine according to the required size and packaging.

[0034] The flame retardant oxygen index of the flame retardant wallpaper prepared by the embodiment is tested to be 31%.

Embodiment 2

[0035] According to the invention, bio-based environment-friendly flame retardant wallpaper, and the preparation thereof specifically comprises the following steps:

[0036] (1) preparing raw paper: preparing seaweed chopped fiber with the length of 3 mm, 4 mm, 5 mm and 6 mm(with the mass ratio of 2:2:3:3) by wet spinning, mixing with 5 wt % of wood pulp with the beating degree of 40 SR and beating, wherein the mass of the seaweed chopped fiber accounts for 50% of the mass of bone dry paper pulp; and performing paper-making and drying after adding a dispersant, namely sodium alkyl diphenyl ether sulfonate with the concentration of 0.02 wt % after dilution and 0.4 wt % of a sodium alginate polymer solution dispersant to prepare the raw paper of the wallpaper;

[0037] (2) coating: firstly coating the 1 wt % of the sodium alginate solution by a coating machine, performing gelation treatment by 4 wt % of a calcium chloride solution, and then uniformly coating PVA, calcium carbonate and DOP paste on the surface of the raw paper, wherein the coating thickness is 0.3 mm;

[0038] (3) drying: drying a coating on the surface of the raw paper through a hot air circulating system, wherein the ambient temperature for drying is 190 C. and the drying time is 18 s;

[0039] (4) cooling: cooling and hardening the surface material by circulating cooling water through two cooling rings, wherein the cooling process is performed at normal temperature, and the cooling time is 20 s;

[0040] (5) printing: using different printing patterns to print the required patterns on the surface of the wallpaper by using corresponding printing wheels;

[0041] (6) softening: heating the wallpaper by utilizing a heating cover to soften the wallpaper to facilitate embossing;

[0042] (7) embossing: pressing the surface of the wallpaper by using an embossing wheel to produce corresponding line effects, wherein the embossing depth is 0.5 mm; and

[0043] (8) cutting and packaging: cutting the wallpaper into the required specification and curling the product into a finished product by a curling machine according to the required size and packaging.

[0044] The extreme oxygen index of the flame retardant wallpaper prepared by the embodiment is tested to be 36%.

Embodiment 3

[0045] According to the invention, bio-based environment-friendly flame retardant wallpaper, and the preparation thereof specifically comprises the following steps:

[0046] (1) preparing raw paper: preparing seaweed chopped fiber with the length of 3 mm and 6 mm(with the mass ratio of 1:1) by wet spinning, mixing with 6 wt % of wood pulp with the beating degree of 50 SR and beating, wherein the mass of the seaweed chopped fiber accounts for 60% of the mass of bone dry paper pulp; and performing paper-making and drying after adding a dispersant, namely sodium fatty alcohol polyoxyethylene ether sulfate with the concentration of 0.04 wt % after dilution and 0.3 wt % of a sodium alginate polymer solution dispersant to prepare the raw paper of the wallpaper;

[0047] (2) coating: firstly coating the 2 wt % of the sodium alginate solution by a coating machine, performing gelation treatment by 5 wt % of a calcium chloride solution, and then uniformly coating PVA, calcium carbonate and DOP paste on the surface of the raw paper, wherein the coating thickness is 0.4 mm;

[0048] (3) drying: drying a coating on the surface of the raw paper through a hot air circulating system, wherein the ambient temperature for drying is 150 C. and the drying time is 18 s;

[0049] (4) cooling: cooling and hardening the surface material by circulating cooling water through two cooling rings, wherein the cooling process is performed at normal temperature, and the cooling time is 15 s;

[0050] (5) printing: using different printing patterns to print the required patterns on the surface of the wallpaper by using corresponding printing wheels;

[0051] (6) softening: heating the wallpaper by utilizing a heating cover to soften the wallpaper to facilitate embossing;

[0052] (7) embossing: pressing the surface of the wallpaper by using an embossing wheel to produce corresponding line effects, wherein the embossing depth is 0.6 mm; and

[0053] (8) cutting and packaging: cutting the wallpaper into the required specification and curling the product into a finished product by a curling machine according to the required size and packaging.

[0054] The extreme oxygen index of the flame retardant wallpaper prepared by the embodiment is tested to be 38%.

Embodiment 4

[0055] According to the invention, bio-based environment-friendly flame retardant wallpaper, and the preparation thereof specifically comprises the following steps:

[0056] (1) preparing raw paper: preparing seaweed chopped fiber with the length of 3 mm and 6 mm (with the mass ratio of 1:1) by wet spinning, mixing with 6 wt % of wood pulp with the beating degree of 60 SR and beating, wherein the mass of the seaweed chopped fiber accounts for 80% of the mass of bone dry paper pulp; and performing paper-making and drying after adding a dispersant, namely alkyl phenyl polyoxy ethylene ether phosphate with the concentration of 0.04 wt % after dilution and 0.3 wt % of a sodium alginate polymer solution dispersant to prepare the raw paper of the wallpaper;

[0057] (2) coating: firstly coating the 2 wt % of the sodium alginate solution by a coating machine, performing gelation treatment by 5 wt % of a calcium chloride solution, and then uniformly coating PVA, calcium carbonate and DOP paste on the surface of the raw paper, wherein the coating thickness is 0.5 mm;

[0058] (3) drying: drying a coating on the surface of the raw paper through a hot air circulating system, wherein the ambient temperature for drying is 250 C. and the drying time is 18s ;

[0059] (4) cooling: cooling and hardening the surface material by circulating cooling water through two cooling rings, wherein the cooling process is performed at normal temperature, and the cooling time is 30 s;

[0060] (5) printing: using different printing patterns to print the required patterns on the surface of the wallpaper by using corresponding printing wheels;

[0061] (6) softening: heating the wallpaper by utilizing a heating cover to soften the wallpaper to facilitate embossing;

[0062] (7) embossing: pressing the surface of the wallpaper by using an embossing wheel to produce corresponding line effects, wherein the embossing depth is 0.5 mm; and

[0063] (8) cutting and packaging: cutting the wallpaper into the required specification and curling the product into a finished product by a curling machine according to the required size and packaging.

[0064] The extreme oxygen index of the flame retardant wallpaper prepared by the embodiment is tested to be 41%.

[0065] It should be understood that the above description of the preferred embodiments is relatively detailed, but it cannot be considered to limit the protection scope of the inventive patent. Those of ordinary skill in the art can make substitutions, simple combinations and other various modifications without departing from the scope protected by the claims of the invention under the inspiration of the invention, and the protection scope claimed by the invention should be defined by the appended claims.