Anti-sublimation hot melt film as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of high polymer materials and textile clothing, and particularly relates to an anti-sublimation hot melt film as well as a preparation method and application thereof. The preparation method of the anti-sublimation hot melt film comprises the following steps: adding polyol, polyisocyanate, a micromolecular chain extender, an auxiliary agent and a catalyst into a twin-screw extruder according to a weight ratio, carrying out a polymerization reaction, and then carrying out underwater pelletizing and curing to obtain polyurethane plastic particles for an anti-sublimation layer material; and carrying out curtain coating to prepare a single-layer film or a multi-layer structure composite film used as a middle layer, so as to obtain the anti-sublimation hot melt film. The prepared anti-sublimation hot melt film has high-grade anti-sublimation performance, migration and sublimation of pigment molecules can be effectively blocked, the film is soft in hand feeling, and good washing and dry cleaning resistance is achieved. The anti-sublimation hot-melt film prepared by the invention can be used as a decorative film, a transfer film and a hot-melt adhesive film, and is applied to the textile fields of trademarks, fabrics, clothes and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of polymer materials and textile clothing, and particularly relates to an anti-sublimation hot-melt film and a preparation method and application thereof. Background Art

[0002] With the improvement of people's quality of life and the increasing aesthetic concept, the pursuit of personalized trends in clothing and accessories with bright colors and different styles has led to the booming and use of a wide range of clothing decorative materials, especially heat transfer decorative films and transfer films. Due to their soft feel, simple and convenient operation, environmentally friendly and non-toxic materials, and high flexibility in color patterns, they are suitable for a large number of promotion and use on a variety of textiles, which can meet the requirements of various clothing designs and bright colors. The personalized characteristic decoration is also deeply loved by consumers. However, fabric factories or garment factories have found in actual applications that some polyester, cotton, nylon, and blended fabrics, especially dark-colored fabrics, will gradually sublimate and migrate to the surface of the clothing film after using these decorative films or transfer films, showing more or large areas of color spots and mixed color areas, which seriously affect the appearance quality and personalized performance of clothing products. The reason is that the transfer film and decorative film used do not have anti-sublimation properties, or the anti-sublimation effect is weak. The gradual sublimation and migration of pigment molecules in the later stage lead to spots and mixed color defects, forming a serious color difference appearance.

[0003] Therefore, it is necessary to study an anti-sublimation hot-melt film with high anti-sublimation grade performance, which can effectively block the migration and sublimation of pigment molecules and is suitable for the production of trademarks, fabrics and clothing. Summary of the invention

[0004] The object of the present invention is to provide an anti-sublimation hot-melt film and a preparation method and application thereof. The anti-sublimation hot-melt film has a high anti-sublimation grade performance, can effectively block the migration and sublimation of pigment molecules, has a soft feel, and has good water-washing and dry-cleaning resistance. The anti-sublimation hot-melt film prepared by the present invention can be used as a decorative film, a transfer film, and a hot-melt adhesive film, and can be applied to textile fields such as trademarks, fabrics, and clothing.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] The present invention provides an anti-sublimation hot-melt film, which comprises the following raw material components in parts by weight:

[0007] Polyol 30-85 parts

[0008] Polyisocyanate 10-35 parts

[0009] Small molecule chain extender 0.3-7 parts

[0010] Additives 0-5 parts

[0011] Catalyst 0.01-0.1 parts.

[0012] Furthermore, the polyol is one or more of polyester polyol, polyether polyol, polycaprolactone polyol, polycarbonate polyol, and silicone polyol; the number average molecular weight of the polyol is 500-5000 g / mol;

[0013] The polyisocyanate is one or more of aromatic polyisocyanate, aliphatic polyisocyanate and alicyclic polyisocyanate;

[0014] The small molecule chain extender is one or more of ethylene glycol, 1,4-butanediol, diethylene glycol, triethylene glycol, 1,2-propylene glycol, neopentyl glycol, methyl propylene glycol, 1,6-hexanediol, 1,3-propylene glycol, dipropylene glycol, tripropylene glycol, butyl ethyl propylene glycol, diethyl pentanediol, 3-methyl-1,5-pentanediol, 1,3-butanediol, 1,2-butanediol, 2,3-butanediol, trimethyl pentanediol, 1,5-pentanediol, 1,2-pentanediol, 2-ethyl-1,3-hexanediol, dodecanediol, 1,4-dihydroxymethylcyclohexane, 1,4-cyclohexanediol, hydroquinone dihydroxyethyl ether, 1,4-cyclohexanediamine, diaminodicyclohexylmethane, trimethylhexanediamine, and dimethyldiaminodicyclohexylmethane;

[0015] The auxiliary agent is one or a mixture of any of an antioxidant, a lubricant and a light stabilizer;

[0016] The catalyst is an organic metal compound and / or a tertiary amine.

[0017] Furthermore, the polyester polyol is prepared by esterification polycondensation reaction of one or more dicarboxylic acids or cyclic dicarboxylic acids or cyclic anhydrides having 4 to 12 carbon atoms and at least one linear or branched diol or cyclic diol having 2 to 12 carbon atoms;

[0018] The polyether polyol is one or more of polytetramethylene ether glycol, polyoxyethylene ether glycol, and polyoxypropylene ether glycol;

[0019] The organosilicon polyol is composed of one or more macromolecular diols with a main molecular chain connected by a Si-O structure and alkyl hydroxyl groups at both ends;

[0020] The polyisocyanate is 4,4'-diphenylmethane diisocyanate, 2,4-diphenylmethane diisocyanate, 2,2'-diphenylmethane diisocyanate, 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, 1,5-naphthalene diisocyanate, 1,4-phenylene diisocyanate, m-xylylene diisocyanate, diphenylmethane-3,3'-dimethoxy-4,4'-diisocyanate, 1,6-hexamethylene diisocyanate, 1,10-decane diisocyanate, 1,11-undecane diisocyanate, 1,12-dodecane diisocyanate, One or more of 1,3-cyclohexane diisocyanate, 1,4-cyclohexane diisocyanate, 2,4-hexahydrotoluene diisocyanate, 2,6-hexahydrotoluene diisocyanate, 4,4'-dicyclohexylmethane diisocyanate, 2,2'-dicyclohexylmethane diisocyanate, 2,4-dicyclohexylmethane diisocyanate, isophorone diisocyanate, 2,4-dimethyloctane-1,8-diisocyanate, lysine diisocyanate, L-lysine diisocyanate, 1,4-butane diisocyanate, 1,5-pentane diisocyanate, and 2-methylpentane diisocyanate;

[0021] The organometallic compound is one or more of stannous acetate, stannous octoate, stannous dilaurate, dibutyltin diacetate, dibutyltin dilaurate, dioctyltin diacetate, bismuth isooctanoate, bismuth laurate, bismuth neodecanoate, bismuth cyclohexaneate, and zinc isooctanoate;

[0022] The tertiary amine is one or more of triethylamine, tributylamine, dimethylbenzylamine, dicyclohexylmethylamine, dimethylcyclohexylamine, N,N,N',N'-tetramethylethylenediamine, N,N,N',N'-tetramethylbutylenediamine, N,N,N',N'-tetramethylhexanediamine, pentamethyldiethylenetriamine, N-methylmorpholine, N-ethylmorpholine and N-cyclohexylmorpholine, tetramethyldiaminoethyl ether, dimethylpiperazine, and 1,2-dimethylimidazole.

[0023] The present invention also provides a method for preparing the anti-sublimation hot-melt film, comprising the following steps:

[0024] (1) By weight, 30-85 parts of polyol, 10-35 parts of polyisocyanate, 0.3-7 parts of small molecule chain extender, 0-5 parts of auxiliary agent, and 0.01-0.1 parts of catalyst are taken;

[0025] (2) The raw materials described in step (1) are uniformly mixed and poured into a twin-screw extruder reactor to carry out a polymerization reaction, and then obtained by underwater granulation and aging to form polyurethane plastic particles for use as anti-sublimation layer materials;

[0026] (3) The polyurethane plastic particles are preliminarily heated to melt at 90-200°C or completely dissolved in a solvent at 60-180°C, and then cast or dried to prepare a single-layer film with a thickness of 0.03-0.2 mm or a multi-layer composite film used as an intermediate layer, thereby obtaining an anti-sublimation hot-melt film.

[0027] Furthermore, in step (2), the polymerization reaction is carried out at an extrusion temperature of 80-250° C. and an extrusion pressure of 3-8 MPa.

[0028] Furthermore, in step (3), the solvent is one or more of acetone, butanone, N,N-dimethylformamide, N,N-dimethylacetamide, tetrahydrofuran, methyl ethyl ketone, cyclohexanone, toluene, o-xylene, m-xylene, and p-xylene.

[0029] Furthermore, in step (3), the drying temperature is 80-140°C.

[0030] The present invention also provides the application of the anti-sublimation hot-melt film or the anti-sublimation hot-melt film prepared by the preparation method in textile manufacturing.

[0031] Furthermore, the textiles include trademarks, fabrics and clothing.

[0032] Furthermore, the application includes using the anti-sublimation hot-melt film as a decorative film, a transfer film and a hot-melt adhesive film.

[0033] The beneficial effects of the present invention are:

[0034] The present invention starts from the essential cause of the anti-sublimation phenomenon of hot-melt film materials. After deeply studying the sublimation and migration mechanism of pigment molecules, the composition structure of the material molecules is specially designed. During the synthesis, on the one hand, a large number of structural links and / or high cohesive energy and high-density structural components with a large polarity contrast with the pigment molecules are introduced into the soft segment structure of the polyurethane molecular chain; on the other hand, a strong polarity and high crystallinity link structure is introduced into the hard segment molecular chain structure of the polyurethane, and there is also a physical cross-linking network on the hard segment molecular structure that can form a large number of hydrogen bonds with the soft segment structure. The excellent effect obtained by the above-mentioned combination design is that the microscopic molecular chains of the material are arranged regularly to form a high-density, high-crystallinity, and rich physical cross-linked network structure. At the same time, the structural components with large polarity contrast between the molecular chains can also play a good role in repelling and hindering the pigment molecules. From the perspective of thermodynamic mechanism, the pigment molecules can sublimate and migrate from the molecular chains on one side of the surface of the film material to the inside. The work required for thermodynamic movement is greatly increased, giving the hot-melt film material a high-level anti-sublimation performance, while maintaining good softness and washability, essentially solving the defect of poor anti-sublimation effect caused by the hot-melt film material's inability to resist the migration of pigment molecules during use. The anti-sublimation hot-melt film prepared by the present invention can be used as a decorative film, transfer film, and hot-melt adhesive film, and is applied to textile fields such as trademarks, fabrics, and clothing. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 Schematic diagram of the anti-sublimation hot-melt film of the single-layer film structure in the present invention;

[0037] Figure 2 Schematic diagram of the anti-sublimation hot-melt film of the two-layer composite structure film in the present invention;

[0038] Figure 3 Schematic diagram of the anti-sublimation hot-melt film of the three-layer composite structure film in the present invention;

[0039] Figure 4 It is a schematic diagram of the application of the anti-sublimation hot-melt film of the single-layer film structure in the present invention in textile decoration;

[0040] Figure 5 This is a schematic diagram of the application of the anti-sublimation hot-melt film of the two-layer composite structure film in the present invention in textile decoration;

[0041] Figure 6This is a schematic diagram of the application of the anti-sublimation hot-melt film of the three-layer composite structure film in the present invention in textile decoration.

[0042] Wherein, the anti-sublimation hot-melt film of the present invention is used as Figure 1 When the single-layer film is used, it is composed of a matte PET release film 1 and an anti-sublimation layer 2; Figure 2 When the two-layer composite structure film is used, it is composed of a matte PET release film 1, a hot melt film 2-1 and an anti-sublimation layer 2-2; Figure 3 The three-layer composite structure film is composed of a matte PET release film 1, a hot-melt film 2-1, an anti-sublimation layer 2-2 and a hot-melt film 2-3.

[0043] The anti-sublimation hot-melt film of the present invention is first applied to the lettering film, and then when it is used for textile decoration, the matte PET release film 1 is torn off and hot-pressed on the easy-sublimation textile fabric 3 by a flat-plate press at a temperature of 160° C., a pressure of 0.4 MPa and a time of 15 seconds. At this time, Figure 4 It is used as a single-layer film on the textile fabric 3, and from the inside to the outside are the anti-sublimation layer 2 and the lettering film 4; Figure 5 It is used as a two-layer composite film on a textile fabric 3, and from the inside to the outside are a hot-melt film layer 2-1, an anti-sublimation layer 2-2, and a lettering film 4; Figure 6 The three-layer structure composite film is used on the textile fabric 3, which comprises a hot-melt film layer 2-3, an anti-sublimation layer 2-2, a hot-melt film layer 2-1 and a lettering film 4 from the inside to the outside. DETAILED DESCRIPTION

[0044] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. 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.

[0045] Example 1

[0046] The specific preparation method of the anti-sublimation hot-melt film in this embodiment 1 comprises the following steps:

[0047] (1) By weight, 65 parts of polybutylene adipate diol with a molecular weight of 1000 g / mol, 29.57 parts of 4,4'-diphenylmethane diisocyanate, 2.93 parts of 1,4-butanediol, 2.5 parts of 1,4-cyclohexanediamine, 0.3 parts of antioxidant 1010, 0.35 parts of lubricant erucamide, 0.15 parts of light stabilizer 7700, and 0.02 parts of stannous octoate were taken;

[0048] (2) The raw materials described in step (1) are mixed uniformly and poured into a twin-screw extruder reactor, and a polymerization reaction is carried out at an extrusion temperature of 80-250° C. and an extrusion pressure of 3-8 MPa, and polyurethane plastic particles are obtained after underwater granulation and aging, which are used as anti-sublimation layer materials;

[0049] (3) The polyurethane plastic particles are preliminarily heated to 90-200°C to melt or completely dissolved in N,N-dimethylacetamide at 120°C, and then cast coated or dried at 80°C to prepare a single-layer film with a thickness of 0.12 mm or a multi-layer composite film used as an intermediate layer, thereby obtaining an anti-sublimation hot-melt film.

[0050] Example 2

[0051] The specific preparation method of the anti-sublimation hot-melt film in this embodiment 2 comprises the following steps:

[0052] (1) By weight, 51.8 parts of polybutylene adipate diol with a molecular weight of 1000 g / mol, 22.2 parts of polycarbonate diol with a molecular weight of 2000 g / mol, 22.63 parts of 4,4'-diphenylmethane diisocyanate, 3.37 parts of 1,6-hexanediol, 0.3 parts of antioxidant 1010, 0.35 parts of lubricant erucamide, 0.15 parts of light stabilizer 622, and 0.02 parts of stannous octoate were taken;

[0053] (2) The raw materials described in step (1) are mixed uniformly and poured into a twin-screw extruder reactor, and a polymerization reaction is carried out at an extrusion temperature of 80-250° C. and an extrusion pressure of 3-8 MPa, and polyurethane plastic particles are obtained after underwater granulation and aging, which are used as anti-sublimation layer materials;

[0054] (3) The polyurethane plastic particles are preliminarily heated to 90-200°C for melting or completely dissolved in N,N-dimethylformamide at 100°C, and then cast coated or dried at 80°C to prepare a 0.1 mm thick single-layer film or a multi-layer composite film used as an intermediate layer, thereby obtaining an anti-sublimation hot-melt film.

[0055] Example 3

[0056] The specific preparation method of the anti-sublimation hot-melt film in this embodiment 3 comprises the following steps:

[0057] (1) By weight, 75 parts of polydimethylsiloxane diol with a molecular weight of 1500 g / mol, 18.1 parts of 1,5-naphthalene isocyanate, 3.46 parts of 1,4-butanediol, 1680.4 parts of antioxidant, 0.4 parts of lubricant oleic acid amide, 7700.15 parts of light stabilizer, and 0.025 parts of bismuth isooctanoate were taken;

[0058] (2) The raw materials described in step (1) are mixed uniformly and poured into a twin-screw extruder reactor, and a polymerization reaction is carried out at an extrusion temperature of 80-250° C. and an extrusion pressure of 3-8 MPa, and polyurethane plastic particles are obtained after underwater granulation and aging, which are used as anti-sublimation layer materials;

[0059] (3) The polyurethane plastic particles are preliminarily heated to 90-200°C to melt or completely dissolved in N,N-dimethylacetamide at 130°C, and then cast coated or dried at 100°C to prepare a 0.1 mm thick single-layer film or a multi-layer composite film used as an intermediate layer, thereby obtaining an anti-sublimation hot-melt film.

[0060] Example 4

[0061] The specific preparation method of the anti-sublimation hot-melt film in this embodiment 4 comprises the following steps:

[0062] (1) By weight, 50.4 parts of polycarbonate diol with a molecular weight of 1000 g / mol, 21.6 parts of polydimethylsiloxane diol with a molecular weight of 2000 g / mol, 23.78 parts of 4,4'-diphenylmethane diisocyanate, 4.22 parts of 1,4-cyclohexanediol, 10100.3 parts of antioxidant, 0.35 parts of lubricant oleic acid amide, 7700.15 parts of light stabilizer, and 0.015 parts of stannous octoate were taken;

[0063] (2) The raw materials described in step (1) are mixed uniformly and poured into a twin-screw extruder reactor, and a polymerization reaction is carried out at an extrusion temperature of 80-250° C. and an extrusion pressure of 3-8 MPa, and polyurethane plastic particles are obtained after underwater granulation and aging, which are used as anti-sublimation layer materials;

[0064] (3) The polyurethane plastic particles are preliminarily heated to 90-200°C to melt or completely dissolved in cyclohexanone at 120°C, and then cast coated or dried at 95°C to prepare a 0.1 mm thick single-layer film or a multi-layer composite film used as an intermediate layer, thereby obtaining an anti-sublimation hot-melt film.

[0065] Example 5

[0066] The specific preparation method of the anti-sublimation hot-melt film in this embodiment 5 comprises the following steps:

[0067] (1) By weight, 51.8 parts of polybutylene adipate diol with a molecular weight of 1000 g / mol, 22.2 parts of poly(1,6-hexanediol-neopentyl glycol) adipate diol with a molecular weight of 2000 g / mol, 5.45 parts of 4,4'-diphenylmethane diisocyanate, 12.71 parts of 2,6-toluene diisocyanate, 2.94 parts of 1,4-butanediol, 0.3 parts of antioxidant 1010, 0.35 parts of lubricant oleic acid amide, 0.15 parts of light stabilizer 7700, and 0.015 parts of 1,2-dimethylimidazole were taken;

[0068] (2) The raw materials described in step (1) are mixed uniformly and poured into a twin-screw extruder reactor, and a polymerization reaction is carried out at an extrusion temperature of 80-250° C. and an extrusion pressure of 3-8 MPa, and polyurethane plastic particles are obtained after underwater granulation and aging, which are used as anti-sublimation layer materials;

[0069] (3) The polyurethane plastic particles are preliminarily heated to melt at 90-200°C or completely dissolved in N,N-dimethylacetamide at 120°C, and then cast coated or dried at 90°C to prepare a 0.1 mm thick single-layer film or a multi-layer composite film used as an intermediate layer, thereby obtaining an anti-sublimation hot-melt film.

[0070] Example 6

[0071] The specific preparation method of the anti-sublimation hot-melt film in this embodiment 6 comprises the following steps:

[0072] (1) By weight, 21 parts of polytetramethylene glycol with a molecular weight of 1000 g / mol, 49 parts of polycarbonate diol with a molecular weight of 2000 g / mol, 26.03 parts of 4,4'-dicyclohexylmethane diisocyanate, 5.97 parts of neopentyl glycol, 0.3 parts of antioxidant BHT, 0.35 parts of lubricant oleic acid amide, 0.15 parts of light stabilizer 7700, and 0.015 parts of stannous octoate were taken;

[0073] (2) The raw materials described in step (1) are mixed uniformly and poured into a twin-screw extruder reactor, and a polymerization reaction is carried out at an extrusion temperature of 80-250° C. and an extrusion pressure of 3-8 MPa, and polyurethane plastic particles are obtained after underwater granulation and aging, which are used as anti-sublimation layer materials;

[0074] (3) The polyurethane plastic particles are preliminarily heated to 90-200°C to melt or completely dissolved in cyclohexanone at 70°C, and then cast coated or dried at 55°C to prepare a 0.1 mm thick single-layer film or a multi-layer composite film used as an intermediate layer, thereby obtaining an anti-sublimation hot-melt film.

[0075] Example 7

[0076] The specific preparation method of the anti-sublimation hot-melt film in this embodiment 7 comprises the following steps:

[0077] (1) By weight, 37.5 parts of 1000 g / mol poly(hexylene adipate) diol, 37.5 parts of 1000 g / mol poly(hexylene phthalate) diol, 20.75 parts of 4,4'-diphenylmethane diisocyanate, 4.25 parts of 1,4-cyclohexanediamine, 0.3 parts of antioxidant BHT, 0.35 parts of lubricant erucamide, 0.15 parts of light stabilizer 7700, and 0.02 parts of bismuth isooctanoate were taken;

[0078] (2) The raw materials described in step (1) are mixed uniformly and poured into a twin-screw extruder reactor, and a polymerization reaction is carried out at an extrusion temperature of 80-250° C. and an extrusion pressure of 3-8 MPa, and polyurethane plastic particles are obtained after underwater granulation and aging, which are used as anti-sublimation layer materials;

[0079] (3) The polyurethane plastic particles are preliminarily heated to 90-200°C to melt or completely dissolved in cyclohexanone at 70°C, and then cast coated or dried at 55°C to prepare a 0.1 mm thick single-layer film or a multi-layer composite film used as an intermediate layer, thereby obtaining an anti-sublimation hot-melt film.

[0080] Example 8

[0081] The specific preparation method of the anti-sublimation hot-melt film in this embodiment 8 comprises the following steps:

[0082] (1) By weight, 29.6 parts of poly(hexylene phthalate) diol with a molecular weight of 1000 g / mol, 44.4 parts of poly(dimethylsiloxane) diol with a molecular weight of 2000 g / mol, 16.16 parts of 4,4'-diphenylmethane diisocyanate, 4.04 parts of 1,4-phenylene diisocyanate, 3.58 parts of 1,4-butanediol, 0.3 parts of antioxidant 1010, 0.35 parts of lubricant erucamide, 0.15 parts of light stabilizer 329, and 0.02 parts of stannous octoate were taken;

[0083] (2) The raw materials described in step (1) are mixed uniformly and poured into a twin-screw extruder reactor, and a polymerization reaction is carried out at an extrusion temperature of 80-250° C. and an extrusion pressure of 3-8 MPa, and polyurethane plastic particles are obtained after underwater granulation and aging, which are used as anti-sublimation layer materials;

[0084] (3) The polyurethane plastic particles are preliminarily heated to melt at 90-200°C or completely dissolved in N,N-dimethylacetamide at 110°C, and then cast coated or dried at 85°C to prepare a 0.1 mm thick single-layer film or a multi-layer composite film used as an intermediate layer, thereby obtaining an anti-sublimation hot-melt film.

[0085] Test Example 1

[0086] The properties of the anti-sublimation hot-melt films prepared in Examples 1-8 and commercially available hot-melt films were measured according to the following method.

[0087] The anti-sublimation hot-melt film of the present invention is first applied to the lettering film, and then when it is used for textile decoration, the matte PET release film is first torn off, and it is hot-pressed on the sublimation-friendly textile fabric by a flat-plate press at a temperature of 160° C., a pressure of 0.4 MPa, and a time of 15 seconds, and finally cooled for 30 minutes and tested according to the following test standards.

[0088] (1) Washability test: According to JIS L0217103 method, wash in a washing machine at 40°C for 100 times, each time for 60 minutes.

[0089] (2) Dry cleaning resistance test: In accordance with GB / T 19981.2-2005 Professional care, dry cleaning and wet cleaning of textiles, fabrics and garments Part 2, performance test procedure for dry cleaning and ironing using tetrachloroethylene, dry cleaning 15 times.

[0090] (3) Hygrothermal aging anti-sublimation test: The test environment temperature is 70°C and the humidity is 95% RH for 15 days.

[0091] (4) High temperature heat aging anti-sublimation test: According to JIS L0854 and DIN 54056 dye and print storage sublimation color fastness standards, dry heat drying at 120℃ for 80min.

[0092] The final results are shown in Table 1.

[0093] Table 1 Comparative test performance data of the anti-sublimation hot-melt films prepared in Examples 1-8 and commercially available hot-melt films

[0094]

[0095]

[0096] As shown in Table 1, the fabric samples pressed by the anti-sublimation hot-melt films prepared in Examples 1-8 all have a soft feel, good dry cleaning resistance and water washing resistance, and the pressed textile fabric samples are tested under long-term wet heat aging conditions and high-temperature dry aging conditions, and the results all have high anti-sublimation grade performance of more than level 4, and some embodiments even reach the highest level of 5, indicating that the anti-sublimation hot-melt film prepared by the present invention can effectively block the sublimation and migration of pigment molecules; while the commercially available hot-melt film has color sublimation spots in a short time in the water washing resistance test, and has serious discoloration defects in the entire region in the long-term wet heat aging anti-sublimation test and the high-temperature heat aging anti-sublimation test. This shows that the anti-sublimation hot-melt film of the present invention has excellent comprehensive performance, can be used as a decorative film, transfer film and hot-melt adhesive film, and is applied to textile fields such as trademarks, fabrics and clothing.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be covered by the scope of the claims of the present invention.

Claims

1. An anti-sublimation hot-melt film, characterized in that: The raw material components are as follows: Polyol 30-85 parts Polyisocyanate 10-35 parts Small molecule chain extender 0.3-7 parts Additives 0-5 parts Catalyst 0.01-0.1 parts.

2. The anti-sublimation hot-melt film according to claim 1, characterized in that: The polyol is one or more of polyester polyol, polyether polyol, polycaprolactone polyol, polycarbonate polyol, and silicone polyol; the number average molecular weight of the polyol is 500-5000 g / mol; The polyisocyanate is one or more of aromatic polyisocyanate, aliphatic polyisocyanate and alicyclic polyisocyanate; The small molecule chain extender is one or more of ethylene glycol, 1,4-butanediol, diethylene glycol, triethylene glycol, 1,2-propylene glycol, neopentyl glycol, methyl propylene glycol, 1,6-hexanediol, 1,3-propylene glycol, dipropylene glycol, tripropylene glycol, butyl ethyl propylene glycol, diethyl pentanediol, 3-methyl-1,5-pentanediol, 1,3-butanediol, 1,2-butanediol, 2,3-butanediol, trimethyl pentanediol, 1,5-pentanediol, 1,2-pentanediol, 2-ethyl-1,3-hexanediol, dodecanediol, 1,4-dihydroxymethylcyclohexane, 1,4-cyclohexanediol, hydroquinone dihydroxyethyl ether, 1,4-cyclohexanediamine, diaminodicyclohexylmethane, trimethylhexanediamine, and dimethyldiaminodicyclohexylmethane; The auxiliary agent is one or a mixture of any of an antioxidant, a lubricant and a light stabilizer; The catalyst is an organic metal compound and / or a tertiary amine.

3. The anti-sublimation hot-melt film according to claim 2, characterized in that: The polyester polyol is prepared by esterification polycondensation reaction of one or more dicarboxylic acids or cyclic dicarboxylic acids or cyclic anhydrides having 4 to 12 carbon atoms and at least one linear or branched diol or cyclic diol having 2 to 12 carbon atoms; The polyether polyol is one or more of polytetramethylene ether glycol, polyoxyethylene ether glycol, and polyoxypropylene ether glycol; The organosilicon polyol is composed of one or more macromolecular diols with a main molecular chain connected by a Si-O structure and alkyl hydroxyl groups at both ends; The polyisocyanate is 4,4'-diphenylmethane diisocyanate, 2,4-diphenylmethane diisocyanate, 2,2'-diphenylmethane diisocyanate, 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, 1,5-naphthalene diisocyanate, 1,4-phenylene diisocyanate, m-xylylene diisocyanate, diphenylmethane-3,3'-dimethoxy-4,4'-diisocyanate, 1,6-hexamethylene diisocyanate, 1,10-decane diisocyanate, 1,11-undecane diisocyanate, 1,12-dodecane diisocyanate, One or more of 1,3-cyclohexane diisocyanate, 1,4-cyclohexane diisocyanate, 2,4-hexahydrotoluene diisocyanate, 2,6-hexahydrotoluene diisocyanate, 4,4'-dicyclohexylmethane diisocyanate, 2,2'-dicyclohexylmethane diisocyanate, 2,4-dicyclohexylmethane diisocyanate, isophorone diisocyanate, 2,4-dimethyloctane-1,8-diisocyanate, lysine diisocyanate, L-lysine diisocyanate, 1,4-butane diisocyanate, 1,5-pentane diisocyanate, and 2-methylpentane diisocyanate; The organometallic compound is one or more of stannous acetate, stannous octoate, stannous dilaurate, dibutyltin diacetate, dibutyltin dilaurate, dioctyltin diacetate, bismuth isooctanoate, bismuth laurate, bismuth neodecanoate, bismuth cyclohexaneate, and zinc isooctanoate; The tertiary amine is one or more of triethylamine, tributylamine, dimethylbenzylamine, dicyclohexylmethylamine, dimethylcyclohexylamine, N,N,N',N'-tetramethylethylenediamine, N,N,N',N'-tetramethylbutylenediamine, N,N,N',N'-tetramethylhexanediamine, pentamethyldiethylenetriamine, N-methylmorpholine, N-ethylmorpholine and N-cyclohexylmorpholine, tetramethyldiaminoethyl ether, dimethylpiperazine, and 1,2-dimethylimidazole.

4. A method for preparing an anti-sublimation hot-melt film according to any one of claims 1 to 3, characterized in that: The steps include: (1) By weight, 30-85 parts of polyol, 10-35 parts of polyisocyanate, 0.3-7 parts of small molecule chain extender, 0-5 parts of auxiliary agent, and 0.01-0.1 parts of catalyst are taken; (2) The raw materials described in step (1) are uniformly mixed and poured into a twin-screw extruder reactor to carry out a polymerization reaction, and then obtained by underwater granulation and aging to form polyurethane plastic particles for use as anti-sublimation layer materials; (3) The polyurethane plastic particles are preliminarily heated to melt at 90-200°C or completely dissolved in a solvent at 60-180°C, and then cast or dried to prepare a single-layer film with a thickness of 0.03-0.2 mm or a multi-layer composite film used as an intermediate layer, thereby obtaining an anti-sublimation hot-melt film.

5. The preparation method according to claim 4, characterized in that: In step (2), the polymerization reaction is carried out at an extrusion temperature of 80-250° C. and an extrusion pressure of 3-8 MPa.

6. The preparation method according to claim 4, characterized in that: In step (3), the solvent is one or more of acetone, butanone, N,N-dimethylformamide, N,N-dimethylacetamide, tetrahydrofuran, methyl ethyl ketone, cyclohexanone, toluene, o-xylene, m-xylene, and p-xylene.

7. The preparation method according to claim 4, characterized in that: In step (3), the drying temperature is 80-140°C.

8. Use of the anti-sublimation hot-melt film according to any one of claims 1 to 3 or the anti-sublimation hot-melt film prepared by the preparation method according to any one of claims 4 to 7 in textile manufacturing.

9. The use according to claim 8, characterized in that: The textile products include trademarks, fabrics and clothing.

10. The use according to claim 8, characterized in that: The application includes using the anti-sublimation hot-melt film as a decorative film, a transfer film and a hot-melt adhesive film.

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