CN102517921A - Method for producing refractive PU synthetic leather - Google Patents

Method for producing refractive PU synthetic leather Download PDF

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Publication number
CN102517921A
CN102517921A CN2012100030794A CN201210003079A CN102517921A CN 102517921 A CN102517921 A CN 102517921A CN 2012100030794 A CN2012100030794 A CN 2012100030794A CN 201210003079 A CN201210003079 A CN 201210003079A CN 102517921 A CN102517921 A CN 102517921A
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resin
synthetic leather
release liners
finished product
knurling rolls
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CN102517921B (en
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许紫峰
陈武奎
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FUJIAN LANFENG LEATHER MAKING Co Ltd
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FUJIAN LANFENG LEATHER MAKING Co Ltd
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Abstract

The invention relates to a method for producing polyurethane (PU) synthetic leather, in particular to a method for producing refractive PU synthetic leather. According to the method for producing the refractive PU synthetic leather, the prepared refractive PU synthetic leather has exquisite grains, soft glossiness, flat shape and good reflective glossiness. The method comprises the following steps of: selecting materials, conveying release paper to a No. 1 coating head, coating a layer of surface material, conveying the release paper to a No. 2 coating head, coating a layer of bottom material on the surface material, preheating the treated release paper to combine a base surface material and the release paper coated with the surface material and the bottom material, drying in an oven to obtain a dry semi-finished product, embossing the dry semi-finished product through a pair of embossing rollers, cooling the embossed semi-finished product, coiling, and thus obtaining a finished product.

Description

A kind of production method of refractive power PU synthetic leather
Technical field
The present invention relates to a kind of production method of PU synthetic leather, especially relate to a kind of production method of refractive power PU synthetic leather.
Background technology
The reinforcement of the reinforcement, particularly environmental protection consciousness realized because the restriction that receives natural conditions and countries in the world watch for animals, the use of natural leather year by year minimizing.The PU synthetic leather has that ABRASION RESISTANCE is strong, intensity and good toughness, oil resistance is good, the cutting rate is high advantage; Become the best substitute of natural leather; Synthetic leather is used more and more widely in fields such as clothing leather, sport footwear, sofa, case and bag, has remedied the influence that brings to curriery in short supply of animal skins to a great extent.
The production craft step of conventional P U synthetic leather is: (1) preparation polyurethane slurry: the viscosity of slurry is had relatively high expectations; Generally should be controlled at 7000-9000Pas; The prescription of slurry is PU resin, dimethyl formamide, wood powder, and wherein, the content of dimethyl formamide is controlled between 10%～15%; (2) the base cloth immersion is handled: base cloth is gone into soaking pit through magazine, extracts the moisture in the base cloth then, then scalds base cloth half-dried; (3) coating is solidified: treated base cloth; Through the coating platform; Employing is coated with the cutter cladding process and is coated in the slurry mixed liquor equably on the base cloth, and the solidification liquid in the coagulating basin is made up of water and dimethyl formamide, and the content of dimethyl formamide is generally 20%～25%; (4) wash, dry, batch.
The PU synthetic leather that adopts the production technology of traditional P U synthetic leather to make exists that glossiness is relatively poor, the refractive power effect is bad; Shortcomings such as lines is unintelligible; Therefore; The exploitation glossiness is good, refractive power is effective, it is clear to reach lines, and the PU synthetic leather of the multi-level aesthetic feeling of administration of human has become the inexorable trend of market development on the appearance sense organ.
Summary of the invention
Therefore, to the problems referred to above, the present invention provides a kind of production method of refractive power PU synthetic leather, and the refractive power PU synthetic leather lines that makes is fine and smooth, glossiness is soft, moulding is smooth, specular gloss is good.
For achieving the above object, the present invention realizes through following technical scheme: a kind of production method of refractive power PU synthetic leather comprises the forming step of PU synthetic leather it is characterized in that the forming step of said PU synthetic leather comprises:
(1) material chosen: comprise release liners, knurling rolls, base, resin choice; Said release liners is provided with lines; Said knurling rolls are provided with lines; Lines and the lines on the knurling rolls on the said release liners should be complementary, and base is selected wet method BASS, and that resin should be selected is high temperature resistant, cold-resistant, the dry embossed resin of hydrolysis;
(2) selection through above release liners, resin, base; Release liners is passed through a dispense tip; Coating one deck viscosity is the lining of 2500～3000cps, and lining is the PU resin of 100:60～80:10～15 by weight ratio: dimethyl formamide: toner is formed, and it is that 30-35%, 100% modulus are the polyurethane resin of 50-70kg/cm2 poor heat resistance that the PU resin is selected solid content for use; Its heat resisting temperature makes the release liners that scribbles precoat at 160～180 ℃;
The release liners that (3) will scribble precoat is through No. two dispense tips; Coating one deck viscosity is the bed material of 3000～5000cps on precoat; Bed material is the PU resin of 100:50～70:10～15 by weight ratio: dimethyl formamide: toner is formed; It is that 30-35%, 100% modulus are the polyurethane resin of 50-70kg/cm2 poor heat resistance that the PU resin is selected solid content for use, and its heat resisting temperature is at 160～180 ℃;
(4) release liners of step (3) being handled is carried out The pre-heat treatment, and base cloth is combined with bed material, handles making the dry type semi-finished product through oven for drying;
(5) the dry type semi-finished product are carried out embossed through a pair of knurling rolls; Its surface of the knurling rolls of an adjacent side with lining is provided with the effective reflecting feel lines of refractive power; And be connected with conduction oil in these knurling rolls and make its surface temperature, make finished product carrying out rolling after the cooling of the semi-finished product after the embossed between 180～210 ℃.
Further improve and be: the oven temperature in the said step (4) is 100～110 ℃.
Further improve and be: the cooling in the said step (5) is to use recirculated cooling water to cool off, and the temperature of cooling is controlled at 15～20 ℃.
Through adopting the aforementioned techniques scheme; The invention has the beneficial effects as follows: the present invention is through changing the proportioning of precoat and initial bed prescription, and the refractive power PU synthetic leather lines that makes is fine and smooth, glossiness is soft, moulding is smooth, specular gloss is good, on the appearance sense organ, gives the multi-level aesthetic feeling of people; Its production technology is compared with the preparation method of traditional P U synthetic leather; Step is simpler, and production effect is better, and production efficiency is higher.
The specific embodiment
Below will combine specific embodiment to specify embodiment of the present invention, how the application technology means solve technical problem to the present invention whereby, and the implementation procedure of reaching technique effect can make much of and implement according to this.
Embodiments of the invention are:
A kind of production method of refractive power PU synthetic leather comprises the forming step of PU synthetic leather it is characterized in that the forming step of said PU synthetic leather comprises:
(1) material chosen: comprise release liners, knurling rolls, base, resin choice; Said release liners is provided with lines; Said knurling rolls are provided with lines; Lines and the lines on the knurling rolls on the said release liners should be complementary, and base is selected wet method BASS, and resin should be selected to resist cold, the dry embossed resin of hydrolysis;
(2) through the preparation and the selection of above release liners, resin, base, through a dispense tip, coating one deck viscosity is the lining of 2750cps with release liners, and lining is the PU resin of 100:70:12 by weight ratio: dimethyl formamide: toner is formed; It is that 35%, 100% modulus is the polyurethane resin of 60kg/cm2 poor heat resistance that the PU resin is selected solid content for use, and its heat resisting temperature makes the release liners that scribbles lining between 160 ~ 180 ℃;
The release liners that (3) will scribble lining is through No. two dispense tips, and coating one deck viscosity is the bed material of 4000cps on precoat, and bed material is the PU resin of 100:60:13 by weight ratio: dimethyl formamide: toner is formed;
(4) release liners of step (3) being handled is carried out The pre-heat treatment, and base cloth is combined with bed material, handles making the dry type semi-finished product through oven for drying, and oven temperature is made as 105 ℃;
(5) the dry type semi-finished product are carried out embossed through a pair of knurling rolls; Its surface of the knurling rolls of an adjacent side with lining is provided with the effective reflecting feel lines of refractive power; Be connected with conduction oil in these knurling rolls, the temperature on control knurling rolls surface makes finished product at 195 ℃ with carrying out rolling after the cooling of the semi-finished product after the embossed; Adopt recirculated cooling water to cool off, the temperature of cooling is controlled at 17 ℃.
Wherein, the viscosity of lining can be 2500～3000cps, the prescription PU resin of lining: dimethyl formamide in the step (2): the weight ratio of toner can be 100:60～80:10～15; The viscosity of bed material can be 3000～5000cps in the step (3); The prescription PU resin of bed material: dimethyl formamide: the weight ratio of toner can be 100:50～70:10～15: it is that 30～35%, 100% modulus is the polyurethane resin of 50～70kg/cm2 poor heat resistance that the PU resin in step (2) and (3) is selected solid content for use, and its heat resisting temperature is at 160～180 ℃; Oven temperature can be 100～110 ℃ in the step (4); The temperature on knurling rolls surface is controlled at 180～210 ℃ in the step (5), and the temperature of cooling water is controlled at 15～20 ℃.
More than the temperature, the weight ratio of various materials, the range of viscosities that relate in each concrete steps be actually the feasible and desirable scope that limits; Use the interior arbitrary numerical value of each span can realize the purpose of inventing; Simultaneously; Equipment that relates in each processing step such as baking oven, knurling rolls, the first-class genus known technology of coating be not so do concrete description to its structure.
The present invention is through changing the proportioning of precoat and initial bed prescription; The glossiness and the refractive power effect of the refractive power PU synthetic leather that makes are all better, and lines is clear, the multi-level aesthetic feeling of administration of human on the appearance sense organ; Its production technology is compared with the preparation method of traditional P U synthetic leather; Step is simpler, and production effect is better, and production efficiency is higher.
The above record is merely the embodiment that utilizes this origination techniques content, anyly is familiar with modification, the variation that this creation of this art utilization is done, and all belongs to the claim of this creation opinion, and is not limited to embodiment announcement person.

Claims (3)

1. the production method of a refractive power PU synthetic leather comprises the forming step of PU synthetic leather it is characterized in that the forming step of said PU synthetic leather comprises:
(1) material chosen: comprise release liners, knurling rolls, base, resin choice; Said release liners is provided with lines; Said knurling rolls are provided with lines; Lines and the lines on the knurling rolls on the said release liners should be complementary, and base is selected wet method BASS, and resin should be selected to resist cold, the dry embossed resin of hydrolysis;
(2) selection through above release liners, resin, base; Release liners is passed through a dispense tip; Coating one deck viscosity is the lining of 2500～3000cps, and lining is the PU resin of 100:60～80:10～15 by weight ratio: dimethyl formamide: toner is formed, and it is that 30-35%, 100% modulus are the polyurethane resin of 50-70kg/cm2 poor heat resistance that the PU resin is selected solid content for use; Its heat resisting temperature makes the release liners that scribbles precoat at 160～180 ℃;
The release liners that (3) will scribble precoat is through No. two dispense tips; Coating one deck viscosity is the bed material of 3000～5000cps on precoat; Bed material is the PU resin of 100:50～70:10～15 by weight ratio: dimethyl formamide: toner is formed; It is that 30-35%, 100% modulus are the polyurethane resin of 50-70kg/cm2 poor heat resistance that the PU resin is selected solid content for use, and its heat resisting temperature is at 160～180 ℃;
(4) release liners of step (3) being handled is carried out The pre-heat treatment, and base cloth is combined with bed material, handles making the dry type semi-finished product through oven for drying;
(5) the dry type semi-finished product are carried out embossed through a pair of knurling rolls; Its surface of the knurling rolls of an adjacent side with lining is provided with the effective reflecting feel lines of refractive power; And be connected with conduction oil in these knurling rolls and make its surface temperature, make finished product carrying out rolling after the cooling of the semi-finished product after the embossed between 180～210 ℃.
2. the production method of a kind of refractive power PU synthetic leather according to claim 1 is characterized in that: the oven temperature in the said step (4) is 100～110 ℃.
3. the production method of a kind of refractive power PU synthetic leather according to claim 1 is characterized in that: the cooling in the said step (5) is to use recirculated cooling water to cool off, and the temperature of cooling is controlled at 15～20 ℃.
CN201210003079.4A 2012-01-06 2012-01-06 Method for producing refractive PU synthetic leather Active CN102517921B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108978254A (en) * 2018-08-10 2018-12-11 福建兰峰制革有限公司 The production method of the cold-resistant synthetic leather of moisture-curable
CN111364255A (en) * 2020-04-03 2020-07-03 泉州梵兜服装有限公司 Velvet PU leather with anti-counterfeiting mark and processing method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000160484A (en) * 1998-11-25 2000-06-13 Ichikin Technical:Kk Production of artificial leather
CN1966265A (en) * 2006-10-27 2007-05-23 海宁杰玛高科涂层织物有限公司 Preparation method of inner decoration material for automobile
CN101525846A (en) * 2009-03-27 2009-09-09 福建兰峰制革有限公司 Method for producing crease-free leathers
CN101545211A (en) * 2009-03-27 2009-09-30 福建兰峰制革有限公司 Method for producing emulational leather
CN102234937A (en) * 2010-05-07 2011-11-09 福建兰峰制革有限公司 Production process of top layer leather-simulated super-fibre synthetic leather

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000160484A (en) * 1998-11-25 2000-06-13 Ichikin Technical:Kk Production of artificial leather
CN1966265A (en) * 2006-10-27 2007-05-23 海宁杰玛高科涂层织物有限公司 Preparation method of inner decoration material for automobile
CN101525846A (en) * 2009-03-27 2009-09-09 福建兰峰制革有限公司 Method for producing crease-free leathers
CN101545211A (en) * 2009-03-27 2009-09-30 福建兰峰制革有限公司 Method for producing emulational leather
CN102234937A (en) * 2010-05-07 2011-11-09 福建兰峰制革有限公司 Production process of top layer leather-simulated super-fibre synthetic leather

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108978254A (en) * 2018-08-10 2018-12-11 福建兰峰制革有限公司 The production method of the cold-resistant synthetic leather of moisture-curable
CN108978254B (en) * 2018-08-10 2020-10-30 福建兰峰制革有限公司 Production method of moisture-cured cold-resistant synthetic leather
CN111364255A (en) * 2020-04-03 2020-07-03 泉州梵兜服装有限公司 Velvet PU leather with anti-counterfeiting mark and processing method thereof

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