CN100491630C - Manufacturing method and application of kapok fiber in the field of non-woven non-woven fabrics - Google Patents

Abstract

The invention relates to an additive, an assistant agent for pre treatment to ceiba fiber and a method for non-woven cloth by the ceiba fiber, belonging to non-woven technology area. Said method is that the additive is used to pre-treat the ceiba fiber; the ceiba fiber after pre-treatment is mixed with all kinds of natural fiber, man made fiber and synthetic fiber and is carded to net; the fiber net is strengthened; after that assistant agent with 1.5-5% wt of ceiba fiber stock weight is added in the sizing groove to mucilage so as to strengthened the intensity; after the formation under high temperature the product is produced. The invention not only realizes the non-woven production of ceiba fiber and all kinds of natural fiber, man made fiber in different proportion but also realizes the fabrication of all kinds of non-woven production with acupuncture and water jet, which uses the 100% ceiba fiber as the stock. It creates the precedent of non-woven area and novel industry chain is formed by producing novel non-woven environmental protection product. The grade of non-woven production is improved.

Description

Manufacturing method and application of kapok fiber in the field of non-woven non-woven fabrics

technical field

The invention relates to an additive and auxiliary agent for pretreatment of kapok fiber, kapok fiber treated with the auxiliary agent and its processing method, and the manufacturing method and application of the kapok fiber in the field of non-woven and non-woven fabrics, belonging to non-woven fabrics The field of nonwoven technology.

Background technique

The non-woven (non-woven) industry is an industry that has just emerged in recent years. Due to the rapid development of chemical fibers, the variety of (non-woven) products is also increasing, and the scope of application is becoming wider and wider. The most important thing is in To make napkins, tablecloths, sanitary napkins, diapers, disposable wet wipes, product packaging, hand shopping bags, etc., almost everyone will use it, and the amount will increase.

However, most of the raw materials currently used to produce (non-woven) products are chemical synthetic fibers. Therefore, these large quantities of used (non-woven) product wastes have become new environmental protection hazards because they are difficult to decompose, which has caused the industry personnel concerns. Therefore, the raw materials of (non-woven) products will also face a revolution, just like disposable fast food boxes, which will eventually be replaced by an environmentally friendly material (natural fiber).

"Kapok fiber" is a kind of fiber that is not well known in the textile industry. It is a fruit of a woody wild natural plant (tree) that grows in subtropical regions, and is very similar to cotton. The surface of the fiber is smooth and the gloss is excellent. It is a kind of natural high hollow and superfine fiber with a hollowness of more than 80% and a linear density of 0.4--0 7dtex.

"Kapok fiber" has some unique advantages that other "natural fibers" and "synthetic fibers" do not have. It is a pure natural environmental protection material. "It has unique features of anti-mildew, moisture-proof, waterproof and moth-proof. It has no irritation or adverse effect on human skin. The ultra-fine and silky fiber makes it feel soft, warm, smooth and comfortable... It is a natural fiber The top grade of materials has an excellent prospect for the application of non-woven (non-woven) products in today's advocating natural materials.

Due to the short length of kapok fiber (15-25mm), smooth fiber surface, poor cohesion rate, low strength, and too light fiber specific gravity, it cannot be carded into a web and spunlace or needle punched on non-woven (non-woven) equipment. Tangle, so it is impossible to make non-woven (non-woven) products, and even in the encyclopedia it is clearly defined that it can only be used as a filler and cannot be used as a textile. Therefore, there has never been a precedent for the application of kapok fiber in non-woven (non-woven) products in the past.

Contents of the invention

The object of the present invention is to provide an additive for pretreatment of kapok fibers in the application of non-woven non-woven fabrics.

Another object of the present invention is to provide an auxiliary agent for kapok fibers used in non-woven fabrics.

Another object of the present invention is to provide a method for manufacturing non-woven non-woven fabrics using kapok fibers.

The processing of non-woven non-woven fabrics is divided into two processes of fiber web formation and fiber web reinforcement. The additives are used in the pretreatment of kapok fibers in the fiber web formation process, and the additives are used in the fiber web reinforcement process.

Described additive is made of following components by weight:

Acrylate 65-75

Starch 15-25

Polyvinyl alcohol 5-15

Water 340-460.

Described additive is preferably made of following components by weight:

Acrylic 70

Starch 20

Polyvinyl alcohol 10

Water 400.

The acrylate is preferably butyl acrylate.

The polyvinyl alcohol preferably has a molecular weight of 500--1500 PVA.

Described auxiliary agent is used in fiber web reinforcement process, and its effect is to increase its intensity, and this auxiliary agent is made of following weight parts:

Vinyl acetate 20-30

Acrylate 25-35

Polyvinyl alcohol 40-50

Above-mentioned auxiliary agent is preferably made of following parts by weight:

Vinyl acetate 25

Acrylic 30

Polyvinyl alcohol 45

The acrylate is preferably butyl acrylate.

The preferred molecular weight of the polyvinyl alcohol is 500--1500.

The method for producing non-woven non-woven fabrics using kapok fiber according to the present invention comprises the following steps: applying the above-mentioned additives to pre-treat the kapok fiber, and treating the kapok fiber after treatment alone or with various natural fibers, artificial fibers, synthetic fibers, etc. Raw materials are mixed, then carded into a web, and the fiber web is reinforced. After the fiber web is reinforced, an auxiliary agent of 1.5%-5% of the weight of the kapok fiber raw material is added to the upper oar groove to make glue to increase its strength. The finished product is obtained after high temperature setting.

The specific process is as follows: dyeing kapok fiber or other mixed fibers or (primary color)→spraying additives on kapok fiber→mixing pure kapok fiber or other fibers→steaming the mixed fiber raw materials→combing→"acupuncture" Or "spunlace" → special additive glue → shaping → drying.

In the present invention, the pretreatment method of applying the above-mentioned additives to the kapok fiber is as follows: mixing the components of the above-mentioned additives to form an additive mixture, heating the mixture to 60-80°C, adding 45-55 Double the weight of kapok fiber, mix evenly, and use 80°C steam in the mixing room to semi-fix the kapok fiber for 10-20 minutes, so that the additive mixture is evenly sprayed on the surface of the kapok fiber and dried. Finish.

After the above treatment, the kapok fiber will form burrs on the surface, and the cohesion force will be greatly strengthened. It can be mixed alone or with other fibers smoothly, and combed into a web.

The fiber web reinforcement method can be hydroentanglement or needle punching.

The consumption of above-mentioned auxiliary agent is preferably 3% of the kapok fiber raw material amount.

After the kapok fiber is mixed alone or with various natural fibers, man-made fibers, synthetic fibers and other raw materials, the application of "acupuncture" non-woven (non-woven) products, and the application of "spunlace" non-woven (non-woven) products Applications. Natural fibers include: plant fibers; (cotton, hemp,), animal fibers; (wool, hair-free, camel hair), man-made fibers include: (acrylic, polyester, nylon, polypropylene, various viscose, PTT), etc., using Kapok itself is waterproof, moisture-proof, mildew-proof, warm-keeping, etc., combined with the characteristics of various fibers, it can produce various grades of daily (non-woven) products, industrial conventional (non-woven) products, and various new (non-woven) products. Textile) wall coverings, high-grade sound insulation materials and other industrial and architectural thermal insulation (non-woven) fabrics and other products of different specifications. The application of kapok fiber or a series of non-woven (non-woven) products with various fibers has been realized, and the application field of (non-woven) products has been expanded.

The beneficial effect of the present invention is: use the auxiliary agent, process, and the treatment method after "acupuncture" and "spunlace" of kapok fiber (non-woven) to change the kapok fiber because of its light specific gravity, which is easy to fly. The defects of "acupuncture" and "spunlace" (non-woven) processing that cannot be processed by forming a web not only realize the non-woven non-woven production of kapok fiber and various natural fibers and artificial fibers in different proportions, but also realize the Use 100% kapok fiber as raw material for the manufacture and application of various non-textile products of "acupuncture" and "spunlace". Created a precedent for kapok entering the (non-woven) field, launched a new industrial chain of environmentally friendly products in the (non-woven) industry, and improved the grade of (non-woven) products.

According to the above successful applications, kapok fiber can be widely used in non-woven (non-woven) fields, and can produce greater economic and social benefits

For the first time at home and abroad, kapok fiber "acupuncture" and "spunlace" (non-woven) processing are used to realize large-scale production. Using conventional (non-woven) products, at the same time, it also uses the characteristics of kapok fiber itself to prevent insects, moisture, mildew, and high warmth. Liner, mattresses, thermal inner and outer garments, thermal inner liner, thermal insulation (non-woven) fabrics of different specifications for industry and construction, etc.

It has laid an important foundation for the further development and utilization of kapok fiber in the future, broke the prohibition of the encyclopedia, and filled the world blank of kapok fiber for non-woven (non-woven).

The successful application of kapok fiber in the field of non-woven (non-woven) will produce immeasurable economic and social benefits. It will create another international and domestic emerging non-woven (non-woven) industry, forming a new industrial chain of environmentally friendly products in the non-woven (non-woven) industry. In the past, it was proposed to use "cotton fiber" instead of "chemical synthetic fiber" to produce environmentally friendly (non-woven) products. However, with the continuous increase in the consumption of (non-woven) products, cotton resources will become an insurmountable obstacle, because cotton fibers are planted in farmland. With the rapid development of industrial economy, the arable area of land will become more and more However, cotton fiber must be planted in limited farmland. Therefore, the reduction of arable land will lead to a decrease in the production of cotton fiber, and the cost of cotton planting will become higher and higher. The kapok fiber grows on the kapok trees in the subtropical zone and my country's Yunnan, Guangxi, Guangdong, and Fujian areas. If a large number of kapok trees are planted in the barren hills in southern China, it will not only increase the forest area of our country, green the mountains, and protect the soil and water vegetation. , which saves limited farmland, and can activate the economy in poor mountainous areas, increase the income of farmers in mountainous areas, and benefit from one planting for life. Therefore, the overall cost of kapok fiber is lower than the cost of cotton. At the same time, as a new type of environmentally friendly (non-woven) product (product with independent intellectual property rights), a large amount of export can exchange for a large amount of foreign exchange for the country.

Description of drawings:

Fig. 1 is the thermal insulation rate and square meter weight relation of kapok fabric of the present invention and common fabric

Fig. 2 is the air permeability and square meter weight relation of kapok fabric of the present invention and common fabric

Detailed ways:

Example 1-5

Example 1 Example 2 Example 3 Example 4 Example 5 Butyl acrylate/g 65 70 75 62 70 Starch/g 15 20 25 twenty two 20 Polyvinyl alcohol/g 15 (molecular weight 600) 10 (molecular weight 1500) 8 (molecular weight 800) 5 (molecular weight 1000) 10 (molecular weight 1200) water/g 460 340 400 380 420 Heating temperature °C 60 65 70 75 80 Kapok fiber/Kg 24.9 24.2 25.4 22.9 26.5 semi-setting processing time 15 20 20 10 15

Mix the components of the above-mentioned additives to form a mixture of additives, heat the mixture to the corresponding temperature, add a certain weight of kapok fiber, mix evenly, and use 80 ° C steam in the mixing room to treat the kapok fiber. The semi-setting treatment at the corresponding time, so that the auxiliary agent mixture is evenly sprayed on the surface of the kapok fiber and dried, and the pre-treatment is completed.

Example 6

Use the kapok fiber obtained in Example 1 to mix with cotton and hemp fiber, dye, and the mixing ratio of kapok fiber is 70%, steam the mixed fiber raw material, then card it into a web, needle punch, and after the fiber web is reinforced, Add 373.5g of additives into the upper oar groove to make glue, increase its strength, and then get the finished product after high temperature setting.

Example 7

Use the kapok fiber obtained in Example 2 to blend with wool, the blending ratio of the kapok fiber is 65%, the mixed fiber raw material is steamed, then carded into a web, spunlace, and after the fiber web is reinforced, paddle Add 484g of additives into the tank to make glue, increase its strength, and then get the finished product through high temperature setting.

Example 8

Use the kapok fiber that embodiment 3 obtains, dye, the fiber raw material is steamed, then it is carded into a net, needle punched, and after the fiber web is reinforced, add 762g auxiliary agent in the oar groove to carry out glue, increase its strength, After high temperature setting, the finished product is obtained.

Example 9

Use the kapok fiber obtained in Example 4 to steam, then comb it into a web, spunlace, and after the fiber web is reinforced, add 916g of auxiliary agents to the upper oar groove to make a glue, increase its strength, and then undergo high-temperature shaping to obtain finished product.

Example 10

Using the kapok fiber obtained in Example 5 and man-made fiber mixed spinning, dyeing, obtained the kapok fiber blending ratio up to 70-95% mixed fiber, steaming the mixed fiber raw material, then carding it into a net, needle punching , After the fiber web is reinforced, add 1325g of additives to the upper oar groove to make glue to increase its strength, and then get the finished product after high temperature shaping.

The composition of auxiliary agent among the embodiment 6-10:

Example 6 Example 7 Example 8 Example 9 Example 10 Vinyl acetate/g 78 101.42 190.5 257.58 389.7 Acrylate/g 137.55 152.13 228.6 257.58 324.75 Polyvinyl alcohol/g 157.2 (molecular weight 500) 230.5 (molecular weight 1500) 342.9 (molecular weight 800) 400.68 (molecular weight 1000) 610.53 (molecular weight 1200) Total amount/g 373.5 484 762 916 1325

The following is the various detection data of kapok fiber of the present invention and all cotton and other fibers in the manufacture of various types of thermal underwear, (the thermal insulation coefficient of the thermal inner and outer garments made of non-woven high-efficiency thermal inner liner layer is based on the temperature of the thermal inner liner layer) depending on thickness):

my country's industry standards stipulate that the warmth retention rate of thermal clothing should not be less than 30%. The series of kapok high-efficiency thermal insulation underwear developed by our company has good thermal insulation effect, and the average thermal retention rate is about 50%, which is better than cashmere and down. The conduction thermal resistance is more than 20% higher than that of cotton products, the convective thermal resistance is 2-3 times that of cotton products, and the warmth retention rate is the world's leading. Moisture permeability, softness, and comfort are superior to cotton fabrics; it has soft and warm touch (the touch difference between ultra-fine kapok and pure cotton products is similar to the difference between cashmere and wool) moisture absorption, moisture conduction, elasticity, and comfort:

1. The heat preservation rate (according to the national standard GB1048-89, using the YG606 flat-plate fabric heat tester to test) mainly reflects the thermal conductivity of the fabric. It can be seen that compared with cotton and polyester cotton products, the heat preservation rate of kapok thermal underwear is significantly improved. , which indicates its high heat conduction. (see picture 1)

2. The air permeability reflects the wind-shielding performance of the fabric (at present, there is no instrument in China that specifically assesses the convective heat dissipation performance or wind-shielding performance of the fabric. Here, the Y561 air permeability tester is used to measure the wind-shielding performance of the fabric). The greater the heat dissipation, the worse the windshield performance. Obviously, the convective heat dissipation of the kapok thermal underwear is significantly lower than that of the cotton and polyester-cotton comparison samples, indicating that the wind-shielding performance is very good. (See Figure 2)

3. Moisture permeability is a direct measure of the wet comfort of fabrics. From the data in the table, it can be seen that the moisture permeability of kapok and cotton fabrics is equivalent. It can also be explained theoretically that the two types of fabrics have the same structure and the same hygroscopicity. Humidity capacity or wet comfort comparable. Therefore, kapok and cotton fabrics have similar wet comfort, and they will never feel stuffy when worn. Some people like to use the air permeability to reflect the wet comfort of the fabric. In fact, the air permeability does not directly correspond to the wet comfort. For example, many polyester fabrics have high air permeability but the wet comfort is still not good, and the user will feel stuffy. On the contrary, if the ventilation volume is too large, the heat preservation effect will be reduced.

The following is a comparison of the main properties of (two varieties in the series of kapok high-efficiency thermal underwear) with cotton and polyester cotton products with the same structure:

Test Index Comparison Table

In short, the fabrics and four-season clothing made of kapok fiber are characterized by light, soft, comfortable, smooth, bright, antistatic, not easy to tangle, moisture absorption and moisture conduction, no mildew and moth, and acid and alkali resistance at room temperature. Green natural environmental protection product.

Claims (9)

1, a kind of additive that kapok fiber is carried out pretreatment in non-woven non-woven manufacture, is characterized in that, described additive is made of following components by weight: Acrylate 65-75 Starch 15-25 Polyvinyl alcohol 5-15 Water 340-460. 2. The additive according to claim 1, characterized in that, the additive consists of the following components in parts by weight: Acrylic 70 Starch 20 Polyvinyl alcohol 10 Water 400. 3. The additive according to claim 1 or 2, wherein the acrylate is butyl acrylate; the molecular weight of the polyvinyl alcohol is 500-1500. 4. A method for manufacturing non-woven fabrics from kapok fibers using the additives described in any one of claims 1 to 3, characterized in that the method is: applying the additives to the kapok fibers for pretreatment, and treating the kapok fibers with The final kapok fiber is mixed alone or with various natural fibers, artificial fibers, and synthetic fibers, and then it is combed into a web for fiber web reinforcement. After the fiber web reinforcement is completed, add kapok fiber raw material weight 1.5- 5% additives are added to glue to increase its strength, and then the finished product is obtained after high temperature setting; the additives are composed of the following parts by weight: 20-30 parts of vinyl acetate, 25-35 parts of acrylate, 40 parts of polyvinyl alcohol -50 copies. 5. The method according to claim 4, wherein the auxiliary agent is composed of the following parts by weight: 25 parts of vinyl acetate, 30 parts of acrylate, and 45 parts of polyvinyl alcohol. 6. The method according to claim 4, characterized in that, the pretreatment is: mixing the components of the above-mentioned additives to form a mixed solution, heating the mixed solution to 60-80°C, adding 45-55 Double the weight of kapok fiber, mix evenly, and use 80°C steam in the mixing room to semi-fix the kapok fiber for 10-20 minutes, so that the additive mixture is evenly sprayed on the surface of the kapok fiber and dried. Finish. 7. The method according to claim 4, characterized in that the fiber web reinforcement method is hydroentanglement or needle punching. 8. The method according to claim 4, characterized in that the amount of the auxiliary agent is 3% of the kapok fiber raw material amount. 9. The kapok fiber obtained by the processing method according to claim 4 is characterized in that, the kapok fiber is subjected to pretreatment, and burrs are formed on the surface, and various natural fibers and man-made fibers are used in different proportions to produce non-woven non-woven fabrics, Or use 100% kapok fiber as a raw material for "acupuncture" and "spunlace" to manufacture various non-woven products.

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