CN104974720A

CN104974720A - Thin-sheet-type self-heating element, preparation method and application thereof

Info

Publication number: CN104974720A
Application number: CN201410145975.3A
Authority: CN
Inventors: 汤小雄; 孙经一
Original assignee: SHANGHAI WARMYOU INDUSTRIAL Co Ltd
Current assignee: SHANGHAI WARMYOU INDUSTRIAL Co Ltd
Priority date: 2014-04-11
Filing date: 2014-04-11
Publication date: 2015-10-14
Anticipated expiration: 2034-04-11
Also published as: CN104974720B

Abstract

The invention discloses a thin-sheet-type self-heating element, a preparation method and an application thereof. The thin-sheet-type self-heating element includes the following components, by weight, 20.0-60.0% of iron powder, 4.0-20.0% of activated carbon, 2.0-6.0% of ultrahigh-molecular-weight polyethylene fiber, 0.5-5.5% of xanthan gum, Arabic gum and carboxymethylcellulose (CMC), 1.0-4.0% of industrial salt, 0.3-1.5% of an anionic surfactant NP-4 and 12.0-28.0% of water. The self-heating element is greatly improved in heating temperature stability, can be prepared into a thin-sheet-type heating element, is free of leakage and is safe, can be widely applied in a body warming patch, a medical operation warming cushion, a medical and health-caring patch, a female menstrual-period dysmenorrhea-alleviating patch, breast caring, medical health caring of lumbar and cervical disease, instruments and meters, and digital product portable heating and the like fields.

Description

Spontaneous hot body of slice-type and its preparation method and application

Technical field

The present invention relates to a kind of spontaneous hot body.

Background technology

Spontaneous hot body, the product critical material that to be warming subsides (being commonly called as " warm paste ", " warmer ", " pastes heat ", " warmer shellfish " etc.) be for human body warm, its ultimate principle is: iron powder, powdered carbon, vermiculite, resin, salt etc. are made heating element with the mixing of the formula of suitable proportion, its loading microporosity oxygen permeable film is covered in the sack that non-woven fabrics makes, the plastic outer bag packaging of outer oxygen barrier.During use, tear plastic outer bag, after non-woven fabrics inner bag ingress of air, oxygen enters from the micropore of non-woven fabrics, and with iron powder generation oxidizing reaction, thus produce heat, reach effect of keeping warm.Warming subsides product heating temp is generally 40 DEG C ~ 65 DEG C in the market, 10 hours of holding time.

Currently available products exists that some is significantly not enough: (1) heating element is too thick, and volume is large, for during human body warm very unsightly; (2) be packed powdery substance, be easy to Lou expect because breakage causes, thus cause the pollution damage to human body or clothing; (3) heating temp is unstable, and causing scald sympathetic is sometimes easily cause low temperature to scald.

Summary of the invention

The object of this invention is to provide spontaneous hot body of a kind of slice-type and its preparation method and application, to overcome the above-mentioned defect that prior art exists.

The spontaneous hot body of slice-type of the present invention, comprises the component of following weight percent:

Preferably, the spontaneous hot body of slice-type, comprises the component of following weight percent:

The thickness of the spontaneous hot body of described slice-type is 1mm-4mm;

The molecular weight of described superhigh molecular weight polyethylene fibers is 1 × 10 ⁶~ 3 × 10 ⁸;

Preparation method of the present invention, comprise the steps: xanthan gum, gum arabic or carboxymethyl cellulose (CMC), Industrial Salt, NP-4 and water mix at normal temperatures, obtain mashed prod, leave standstill 10 hours;

Water add weight be the 10-15 of xanthan gum, gum arabic or carboxymethyl cellulose weight doubly;

Under normal temperature, add iron powder, gac superhigh molecular weight polyethylene fibers, be uniformly mixed, be pressed into the three-dimensional shape of sheet or needs, then be greater than under 720 holder vacuum tightnesss, 180 DEG C of dryings 1.5 hours, can obtain the spontaneous hot body of described slice-type.

The water of formula ratio adds in use.

The present invention uses like this:

After adding the water of formula ratio, loading microporosity oxygen permeable film covers after in the sack that non-woven fabrics makes and claims " inner bag ", and the plastic outer bag of outer oxygen barrier is packed.During use, tear plastic outer bag, after non-woven fabrics inner bag ingress of air, oxygen enters from the micropore of non-woven fabrics, thus produce heat, reach effect of keeping warm.

The composition of raw materials generation chemical reaction heat that the present invention is new, considerably improves the heating temp stability of spontaneous hot body; Meanwhile, reach the same time with less raw material, thus solve and do not need thick and heavy heating element; To be fried batter in a thin layer shape heating element by special processes, thus more attractive in appearance, without leaking material problem, safer.The slice-type heating element that the technology of the present invention is made, ultra-thin, be easy to moulding, heating stable, without leaking material, safer environmental protection, many fields such as human body warm subsides, medical operation Warm cover, health care patch heating and thermal insulation, the subsides of female menstrual period relieving dysmenorrhea, breast health promotion, the health care of lumbar vertebrae strength vertebra disease, instrument and digital product Portable heating be warming can be widely used in.

Embodiment

Note, embodiment needs to adopt single-point numerical value.

Embodiment 1

Formula:

The thickness of the spontaneous hot body of described slice-type is 1mm; The long 100mm of wide 100mm

The molecular weight of described superhigh molecular weight polyethylene fibers is 1 × 10 ⁶;

Preparation method of the present invention: by xanthan gum, Industrial Salt, NP-4 and mixing at normal temperatures, obtains mashed prod, leaves standstill 10 hours; The weight that adds of water is xanthan gum weight 10 times;

Under normal temperature, add iron powder, gac superhigh molecular weight polyethylene fibers, be uniformly mixed, be pressed into sheet, then under 720 holder vacuum tightnesss, 180 DEG C of dryings 1.5 hours, can obtain the spontaneous hot body of described slice-type.The water of formula ratio adds in use.

Using method: after adding the water of formula ratio, loading microporosity oxygen permeable film covers in the sack that non-woven fabrics makes, the plastic outer bag packaging of outer oxygen barrier.During use, tear plastic outer bag, after non-woven fabrics inner bag ingress of air, oxygen enters from the micropore of non-woven fabrics, and with iron powder generation oxidizing reaction, thus produce heat, reach effect of keeping warm.Test method described below is adopted to detect:

Persistent fever time 35min, medial temperature, 41.5 DEG C

Time (t) min	0	5	10	15	20	25	30	35
									Temperature (T) DEG C	37.0	40	44.2	44.3	44.2	44.5	40.8	37.5

Embodiment 2

Formula:

The thickness of the spontaneous hot body of described slice-type is 4mm; The long 100mm of wide 100mm

The molecular weight of described superhigh molecular weight polyethylene fibers is 3 × 10 ⁸;

Preparation method of the present invention: by gum arabic, Industrial Salt, NP-4 and mixing at normal temperatures, obtains mashed prod, leaves standstill 10 hours; Water add 15 times that weight is gum arabic weight;

Under normal temperature, add iron powder, gac superhigh molecular weight polyethylene fibers, be uniformly mixed, compacting slice-type shape, then under 720 holder vacuum tightnesss, 180 DEG C of dryings 1.5 hours, can obtain the spontaneous hot body of described slice-type.The water of formula ratio adds in use.

Using method is with embodiment 1.

Test method described below is adopted to detect:

Persistent fever time 155min.

Medial temperature, 44.0 DEG C

Time (t) min	0	5	10	15	20	25	30	35
									Temperature (T) DEG C	37.0	39.5	42.2	43.5	44.6	45.2	46.0	46.3
Time (t) min	40	45	50	55	60	65	70	75
									Temperature (T) DEG C	47.0	47.1	47.2	47.1	47.2	47.5	47.8	47.5

Time (t) min	80	85	90	95	100	105	110	115
									Temperature (T) DEG C	47.0	47.0	46.8	46.3	46.5	45.5	44,8	44.0
Time (t) min	120	125	130	135	140	145	150	155
									Temperature (T) DEG C	42.5	42.4	41.2	39.2	38.4	37.6	37.8	37.3

Test method

Be (25 ± 2) DEG C in testing laboratory's atmospheric condition, relative humidity RH is under the condition of (50 ~ 60) %, by a pure wool towel [long (530 ± 5) mm, wide (330 ± 5) mm, quality (100 ± 5) g] lie in desktop, along long limit and each doubling of minor face once, outer packing plastic is cut off with scissors, inner bag is lain in rapidly 1/2 middle of doubling towel long side direction, then the thermometer (precision is ± 1 DEG C) being (0 ~ 100) DEG C range insert warm paste with cotton towel in the middle of (thermometer mercury steep the center being in and warming up and paste), again towel along the doubling of long limit, observe temperature-rise period, temperature rise is to (t when 37 DEG C ₀), start record, every 5 minutes records once, until after temperature is raised to the highest temperature, when dropping to again 37 DEG C, record the time (t ₁), read in top temperature value record, the persistent fever time calculates by formula (1), and medial temperature calculates by formula (2):

t=t ₁-t ₀---------------------------------------------（1）

In formula:

The t------persistent fever time, unit is: min

T ₁the time write down when------temperature drops to 40 DEG C, unit is: min

T ₀the time write down when------temperature rises to 40 DEG C, unit is: min

T = \frac{ΣTi \times 5}{t + 5} - - - (2)

In formula: T medial temperature, unit is: DEG C;

The temperature value that the different point of observation of Ti records, unit is: DEG C;

5 interval times, unit is: min;

The t persistent fever time, unit is: min.

Claims

1. the spontaneous hot body of slice-type, is characterized in that, comprises the component of following weight percent:

2. the spontaneous hot body of slice-type, is characterized in that, comprises the component of following weight percent:

3. the spontaneous hot body of slice-type according to claim 1 or 2, is characterized in that, thickness is 1mm-4mm.

4. the spontaneous hot body of slice-type according to claim 1 or 2, is characterized in that, the molecular weight of described superhigh molecular weight polyethylene fibers is 1 × 10 ⁶~ 3 × 10 ⁸.

5. the spontaneous hot body of slice-type according to claim 3, it is characterized in that, the molecular weight of described superhigh molecular weight polyethylene fibers is 1 × 10 ⁶~ 3 × 10 ⁸.

6. the preparation method of the spontaneous hot body of slice-type according to any one of Claims 1 to 5, is characterized in that, comprise the steps: xanthan gum, gum arabic or carboxymethyl cellulose (CMC), Industrial Salt, NP-4 and water mix at normal temperatures, obtain mashed prod, leave standstill 10 hours;

Under normal temperature, add iron powder, gac superhigh molecular weight polyethylene fibers, be uniformly mixed, be pressed into the three-dimensional shape of sheet or needs, then be greater than under 720 holder vacuum tightnesss, 180 DEG C of dryings 1.5 hours, can obtain the spontaneous hot body of described slice-type, the water of formula ratio adds in use.

7. the application of the spontaneous hot body of slice-type according to any one of Claims 1 to 5, it is characterized in that, for the preparation of human body warm subsides, medical operation Warm cover, health care patch heating and thermal insulation, the subsides of female menstrual period relieving dysmenorrhea, breast health promotion, the sick health care of lumbar vertebrae strength vertebra, instrument or the warming equipment of digital product Portable heating.